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<\/figure>\n\n\n\nThe Short Answer<\/h2>\n\n\n\n
Before ordering a customized LCD module,<\/a> define these ten items:<\/p>\n\n\n\n Mark every item as fixed, preferred or flexible. This simple distinction helps the supplier preserve what matters while using an existing platform where it does not.<\/p>\n\n\n\n Customization is justified when a standard display transfers too much cost or risk into the rest of the product.<\/p>\n\n\n\n For example, changing an enclosure tool to suit a standard module may cost more than modifying the display FPC. A brighter backlight may avoid a deep external sunshade. A custom cover lens may combine the viewing window, branding and sealed front surface into one part. An interface board may preserve a proven host processor.<\/p>\n\n\n\n Consider a custom TFT LCD display when:<\/p>\n\n\n\n Customization should solve a documented constraint. It should not be used merely to make the part number unique.<\/p>\n\n\n\n The phrase \u201ccustom display\u201d can describe very different amounts of engineering.<\/p>\n\n\n\n The display module remains unchanged. The supplier helps identify an existing model that meets the mechanical, optical, electrical and environmental requirements.<\/p>\n\n\n\n This is normally the quickest route to an initial prototype. It also preserves the widest sourcing and qualification history.<\/p>\n\n\n\n A proven TFT platform remains at the center, while integration components change around it.<\/p>\n\n\n\n Typical semi-custom work includes:<\/p>\n\n\n\n For many industrial products, this is the practical middle ground. It solves fit and performance problems without creating new panel glass.<\/p>\n\n\n\n A full-custom project may change the TFT glass outline, active area, resolution, backlight, FPC and mechanical construction.<\/p>\n\n\n\n It can provide exact geometry, but it also introduces more tooling, material commitments, validation and lifecycle risk. This route normally makes sense when the display geometry creates real product value and expected volume supports the investment.<\/p>\n\n\n\n Ask the supplier to state exactly which layers are standard and which are project-specific.<\/p>\n\n\n\n Diagonal size is useful for product categories, but it does not define mechanical fit.<\/p>\n\n\n\n Two displays with the same diagonal can have different aspect ratios, active areas, outer dimensions, bezel widths and connector positions. One may fit the enclosure while the other interferes with a boss or places the FPC against a sharp bend.<\/p>\n\n\n\n Provide or request these dimensions:<\/p>\n\n\n\n The active area, commonly marked AA, is the area containing active pixels.<\/p>\n\n\n\n The viewing area, commonly marked VA, is the visible opening defined by the bezel, frame or cover printing. It is usually slightly larger than the active area but smaller than the full module outline.<\/p>\n\n\n\n Confusing AA and VA can produce visible borders, clipped pixels or a cover window that exposes internal structures. Reference both to the same mechanical datums and include tolerances.<\/p>\n\n\n\n If some dimensions can move, provide a maximum permitted envelope and identify fixed obstructions. A display module supplier can then search a larger group of existing platforms.<\/p>\n\n\n\n State which dimensions are fixed by tooling and which can change. This may turn an expensive full-custom request into a lower-risk semi-custom solution.<\/p>\n\n\n\n Resolution should come from the content and viewing distance, not from the highest number available.<\/p>\n\n\n\n List the smallest text, number of controls, graph detail, image content and expected viewing distance. A compact instrument that shows four measurements has different needs from a diagnostic device displaying waveforms or camera images.<\/p>\n\n\n\n Higher resolution can improve fine detail, but it also affects:<\/p>\n\n\n\n Common display shapes include 4:3, 16:9 and other wide, square, round or bar formats. Changing aspect ratio late can force a complete redesign of the user interface and front housing.<\/p>\n\n\n\n Prototype the interface at the actual physical size. A layout that looks comfortable on a desktop monitor may be difficult to operate on a small TFT.<\/p>\n\n\n\n Rotating a display changes more than the drawing orientation. Preferred viewing direction, polarized-sunglasses behavior, cable routing, pixel order, graphics memory and touch coordinates may be affected.<\/p>\n\n\n\n Confirm portrait use before the panel and enclosure are frozen.<\/p>\n\n\n\n \u201cHigh brightness\u201d is not a complete requirement.<\/p>\n\n\n\n Describe whether the product operates indoors, near windows, in open shade or in direct sunlight. State the expected viewing distance, enclosure color, cover stack and available power.<\/p>\n\n\n\n Brightness is measured in candelas per square meter, commonly called nits. Clarify whether the requirement applies to:<\/p>\n\n\n\n A touch sensor, adhesive and cover glass absorb and reflect part of the emitted light. The finished value may be lower than the panel rating.<\/p>\n\n\n\n Request the typical or minimum luminance, uniformity, measurement condition, dimming method and performance at high temperature.<\/p>\n\n\n\n Do not specify maximum brightness without reviewing heat and backlight life. In a sealed industrial enclosure, the thermal limit may matter more than the catalog value.<\/p>\n\n\n\n An HMI may be installed above eye level, below the operator or at the side of a machine. The display should be evaluated from those positions.<\/p>\n\n\n\n IPS TFT technology generally provides more stable contrast and color across wide viewing directions. TN can remain suitable when the viewing position is controlled and cost or availability favors it.<\/p>\n\n\n\n Define:<\/p>\n\n\n\n Test the production interface, including small text, alarms and dark backgrounds. A colorful demonstration image can hide viewing-angle weaknesses.<\/p>\n\n\n\n Many industrial products do not need cinema-grade color. They need alarms to remain distinguishable, brand colors to be consistent and graphs to be readable from unit to unit.<\/p>\n\n\n\n Useful requirements may include:<\/p>\n\n\n\n Avoid demanding a wide gamut if the interface uses only simple status colors. It can narrow the panel choice without improving the operator’s task.<\/p>\n\n\n\n For medical imaging or measurement applications where color affects interpretation, define the applicable performance and validation process with a qualified engineer. A general-purpose TFT specification is not a substitute for system-level compliance.<\/p>\n\n\n\n Temperature, humidity, sunlight, vibration and contamination influence material selection and test planning.<\/p>\n\n\n\n Provide:<\/p>\n\n\n\n Do not copy the widest available temperature range into the RFQ unless the equipment actually needs it. Wider requirements can reduce panel choice and increase cost.<\/p>\n\n\n\n Define what the image must do at the limits. At low temperature, pixel response can slow. At high temperature, brightness, contrast, adhesives and backlight life may be affected.<\/p>\n\n\n\n A custom touch display should be specified around the people and tools that operate it.<\/p>\n\n\n\n Projected capacitive touch, or PCAP, provides a durable glass front, clear optics and multi-touch capability. It may support defined gloves and wet conditions when the sensor, controller and firmware are engineered for the final stack.<\/p>\n\n\n\n Resistive touch responds to pressure and can normally be used with a finger, most gloves or a passive stylus. It remains useful for single-touch industrial interfaces and universal-glove operation.<\/p>\n\n\n\n Provide:<\/p>\n\n\n\n\n
When Should You Choose a Custom TFT LCD Display<\/a>?<\/h2>\n\n\n\n
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Three Levels of Customization<\/h2>\n\n\n\n
Standard Module with Selection Support<\/h3>\n\n\n\n
Semi-Custom TFT LCD Module<\/a><\/h3>\n\n\n\n
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Fully Custom Display<\/a><\/h3>\n\n\n\n
Customization level<\/th> Main benefit<\/th> Main limitation<\/th> Typical use<\/th><\/tr><\/thead> Standard selection<\/td> Fastest and lowest development risk<\/td> Product must accept existing geometry and interface<\/td> Early prototypes and flexible enclosures<\/td><\/tr> Semi-custom<\/td> Solves integration problems while retaining a proven TFT platform<\/td> Some core dimensions remain fixed<\/td> Most industrial and specialized OEM projects<\/td><\/tr> Fully custom<\/td> Maximum control of active area and module geometry<\/td> Higher tooling, MOQ, schedule and qualification burden<\/td> Stable, higher-volume programs with unique requirements<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n Size: Define More Than the Diagonal<\/h2>\n\n\n\n
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AA and VA Are Not Interchangeable<\/h3>\n\n\n\n
Share the Maximum Envelope, Not Only a Target Outline<\/h3>\n\n\n\n
Resolution and Aspect Ratio<\/h2>\n\n\n\n
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Match Aspect Ratio Before Finalizing the Enclosure<\/h3>\n\n\n\n
Landscape and Portrait Require Separate Review<\/h3>\n\n\n\n
Brightness: Specify the Environment and Measurement Point<\/h2>\n\n\n\n
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Viewing Angle and Image Stability<\/h2>\n\n\n\n
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Color Performance<\/a>: Specify Only What the Product Uses<\/h2>\n\n\n\n
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Operating Environment<\/h2>\n\n\n\n
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Touchscreen: Begin with the Operator<\/h2>\n\n\n\n
![TFT LCD Module<\/a><\/h3>\n\n\n\nA proven TFT platform remains at the center, while integration components change around it.<\/p>\n\n\n\nTypical semi-custom work includes:<\/p>\n\n\n\n\nRevised FPC length, shape or pin assignment<\/li>\n\n\n\nDifferent connector<\/li>\n\n\n\nModified backlight or brightness<\/li>\n\n\n\nCustom touch panel<\/li>\n\n\n\nPrinted cover lens<\/li>\n\n\n\nOptical bonding<\/li>\n\n\n\nMounting frame or adhesive<\/li>\n\n\n\nInterface-conversion or driver board<\/li>\n<\/ul>\n\n\n\nFor many industrial products, this is the practical middle ground. It solves fit and performance problems without creating new panel glass.<\/p>\n\n\n\nFully Custom Display<\/a><\/h3>\n\n\n\nA full-custom project may change the TFT glass outline, active area, resolution, backlight, FPC and mechanical construction.<\/p>\n\n\n\nIt can provide exact geometry, but it also introduces more tooling, material commitments, validation and lifecycle risk. This route normally makes sense when the display geometry creates real product value and expected volume supports the investment.<\/p>\n\n\n\nCustomization level<\/th>Main benefit<\/th>Main limitation<\/th>Typical use<\/th><\/tr><\/thead>Standard selection<\/td>Fastest and lowest development risk<\/td>Product must accept existing geometry and interface<\/td>Early prototypes and flexible enclosures<\/td><\/tr>Semi-custom<\/td>Solves integration problems while retaining a proven TFT platform<\/td>Some core dimensions remain fixed<\/td>Most industrial and specialized OEM projects<\/td><\/tr>Fully custom<\/td>Maximum control of active area and module geometry<\/td>Higher tooling, MOQ, schedule and qualification burden<\/td>Stable, higher-volume programs with unique requirements<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\nAsk the supplier to state exactly which layers are standard and which are project-specific.<\/p>\n\n\n\nSize: Define More Than the Diagonal<\/h2>\n\n\n\nDiagonal size is useful for product categories, but it does not define mechanical fit.<\/p>\n\n\n\nTwo displays with the same diagonal can have different aspect ratios, active areas, outer dimensions, bezel widths and connector positions. One may fit the enclosure while the other interferes with a boss or places the FPC against a sharp bend.<\/p>\n\n\n\nProvide or request these dimensions:<\/p>\n\n\n\n\nActive area: the pixel-producing portion of the display<\/li>\n\n\n\nViewing area: the opening through which the active area is seen<\/li>\n\n\n\nModule outline: the maximum external dimensions of the complete LCM<\/li>\n\n\n\nOverall thickness, including component peaks<\/li>\n\n\n\nActive-area location from controlled datums<\/li>\n\n\n\nConnector location and mating height<\/li>\n\n\n\nFPC exit position, direction and length<\/li>\n\n\n\nMounting tabs, holes and support areas<\/li>\n\n\n\nKeep-out areas for components and cable bends<\/li>\n<\/ul>\n\n\n\nAA and VA Are Not Interchangeable<\/h3>\n\n\n\nThe active area, commonly marked AA, is the area containing active pixels.<\/p>\n\n\n\nThe viewing area, commonly marked VA, is the visible opening defined by the bezel, frame or cover printing. It is usually slightly larger than the active area but smaller than the full module outline.<\/p>\n\n\n\nConfusing AA and VA can produce visible borders, clipped pixels or a cover window that exposes internal structures. Reference both to the same mechanical datums and include tolerances.<\/p>\n\n\n\nShare the Maximum Envelope, Not Only a Target Outline<\/h3>\n\n\n\nIf some dimensions can move, provide a maximum permitted envelope and identify fixed obstructions. A display module supplier can then search a larger group of existing platforms.<\/p>\n\n\n\nState which dimensions are fixed by tooling and which can change. This may turn an expensive full-custom request into a lower-risk semi-custom solution.<\/p>\n\n\n\nResolution and Aspect Ratio<\/h2>\n\n\n\nResolution should come from the content and viewing distance, not from the highest number available.<\/p>\n\n\n\nList the smallest text, number of controls, graph detail, image content and expected viewing distance. A compact instrument that shows four measurements has different needs from a diagnostic device displaying waveforms or camera images.<\/p>\n\n\n\nHigher resolution can improve fine detail, but it also affects:<\/p>\n\n\n\n\nProcessor and graphics capability<\/li>\n\n\n\nFrame-buffer memory<\/li>\n\n\n\nInterface bandwidth<\/li>\n\n\n\nUI development workload<\/li>\n\n\n\nPower consumption<\/li>\n\n\n\nPixel density under anti-glare cover treatment<\/li>\n\n\n\nAvailability of suitable TFT platforms<\/li>\n<\/ul>\n\n\n\nMatch Aspect Ratio Before Finalizing the Enclosure<\/h3>\n\n\n\nCommon display shapes include 4:3, 16:9 and other wide, square, round or bar formats. Changing aspect ratio late can force a complete redesign of the user interface and front housing.<\/p>\n\n\n\nPrototype the interface at the actual physical size. A layout that looks comfortable on a desktop monitor may be difficult to operate on a small TFT.<\/p>\n\n\n\nLandscape and Portrait Require Separate Review<\/h3>\n\n\n\nRotating a display changes more than the drawing orientation. Preferred viewing direction, polarized-sunglasses behavior, cable routing, pixel order, graphics memory and touch coordinates may be affected.<\/p>\n\n\n\nConfirm portrait use before the panel and enclosure are frozen.<\/p>\n\n\n\nBrightness: Specify the Environment and Measurement Point<\/h2>\n\n\n\n\u201cHigh brightness\u201d is not a complete requirement.<\/p>\n\n\n\nDescribe whether the product operates indoors, near windows, in open shade or in direct sunlight. State the expected viewing distance, enclosure color, cover stack and available power.<\/p>\n\n\n\nBrightness is measured in candelas per square meter, commonly called nits. Clarify whether the requirement applies to:<\/p>\n\n\n\n\nThe bare TFT surface<\/li>\n\n\n\nThe display plus touch panel<\/li>\n\n\n\nThe outer surface of the completed cover-lens assembly<\/li>\n<\/ul>\n\n\n\nA touch sensor, adhesive and cover glass absorb and reflect part of the emitted light. The finished value may be lower than the panel rating.<\/p>\n\n\n\nRequest the typical or minimum luminance, uniformity, measurement condition, dimming method and performance at high temperature.<\/p>\n\n\n\nDo not specify maximum brightness without reviewing heat and backlight life. In a sealed industrial enclosure, the thermal limit may matter more than the catalog value.<\/p>\n\n\n\nViewing Angle and Image Stability<\/h2>\n\n\n\nAn HMI may be installed above eye level, below the operator or at the side of a machine. The display should be evaluated from those positions.<\/p>\n\n\n\nIPS TFT technology generally provides more stable contrast and color across wide viewing directions. TN can remain suitable when the viewing position is controlled and cost or availability favors it.<\/p>\n\n\n\nDefine:<\/p>\n\n\n\n\nLandscape or portrait installation<\/li>\n\n\n\nPrimary viewing direction<\/li>\n\n\n\nRequired horizontal and vertical viewing cone<\/li>\n\n\n\nCritical colors and gray levels<\/li>\n\n\n\nUse with polarized sunglasses<\/li>\n\n\n\nLighting at the installation point<\/li>\n<\/ul>\n\n\n\nTest the production interface, including small text, alarms and dark backgrounds. A colorful demonstration image can hide viewing-angle weaknesses.<\/p>\n\n\n\nColor Performance<\/a>: Specify Only What the Product Uses<\/h2>\n\n\n\nMany industrial products do not need cinema-grade color. They need alarms to remain distinguishable, brand colors to be consistent and graphs to be readable from unit to unit.<\/p>\n\n\n\nUseful requirements may include:<\/p>\n\n\n\n\nColor depth<\/li>\n\n\n\nWhite-point range<\/li>\n\n\n\nColor-gamut target<\/li>\n\n\n\nUnit-to-unit color tolerance<\/li>\n\n\n\nGamma or gray-scale behavior<\/li>\n\n\n\nColor shift with viewing angle and temperature<\/li>\n\n\n\nWhether calibration is required<\/li>\n<\/ul>\n\n\n\nAvoid demanding a wide gamut if the interface uses only simple status colors. It can narrow the panel choice without improving the operator’s task.<\/p>\n\n\n\nFor medical imaging or measurement applications where color affects interpretation, define the applicable performance and validation process with a qualified engineer. A general-purpose TFT specification is not a substitute for system-level compliance.<\/p>\n\n\n\nOperating Environment<\/h2>\n\n\n\nTemperature, humidity, sunlight, vibration and contamination influence material selection and test planning.<\/p>\n\n\n\nProvide:<\/p>\n\n\n\n\nMinimum and maximum operating temperature<\/li>\n\n\n\nStorage and transport temperature<\/li>\n\n\n\nRequired cold-start behavior<\/li>\n\n\n\nHumidity and condensation conditions<\/li>\n\n\n\nUV or direct-sun exposure<\/li>\n\n\n\nVibration and mechanical shock profile<\/li>\n\n\n\nDust, water and cleaning-fluid exposure<\/li>\n\n\n\nExpected daily operating hours<\/li>\n<\/ul>\n\n\n\nDo not copy the widest available temperature range into the RFQ unless the equipment actually needs it. Wider requirements can reduce panel choice and increase cost.<\/p>\n\n\n\nDefine what the image must do at the limits. At low temperature, pixel response can slow. At high temperature, brightness, contrast, adhesives and backlight life may be affected.<\/p>\n\n\n\nTouchscreen: Begin with the Operator<\/h2>\n\n\n\nA custom touch display should be specified around the people and tools that operate it.<\/p>\n\n\n\nProjected capacitive touch, or PCAP, provides a durable glass front, clear optics and multi-touch capability. It may support defined gloves and wet conditions when the sensor, controller and firmware are engineered for the final stack.<\/p>\n\n\n\nResistive touch responds to pressure and can normally be used with a finger, most gloves or a passive stylus. It remains useful for single-touch industrial interfaces and universal-glove operation.<\/p>\n\n\n\nProvide:<\/p>\n\n\n\n\nRequired touch technology<\/li>\n\n\n\nNumber of touch points<\/li>\n\n\n\nGesture requirements<\/li>\n\n\n\nActual glove type and thickness<\/li>\n\n\n\nFinger, passive stylus or active stylus use<\/li>\n\n\n\nWater and cleaning conditions<\/li>\n\n\n\nMinimum touch-target size<\/li>\n\n\n\nRequired touch interface, typically I\u00b2C or USB for PCAP<\/li>\n\n\n\nOperating-system and driver requirements<\/li>\n<\/ul>\n\n\n\n\u201cWorks with gloves\u201d and \u201cworks when wet\u201d are incomplete. Supply actual gloves and define whether water should be rejected or valid touch must continue.<\/p>\n\n\n\nCover Lens<\/a>: Treat It as an Engineered Part<\/h2>\n\n\n\nThe cover lens creates the visible face of the product. It also affects touch sensitivity, reflection, sealing and assembly tolerances.<\/p>\n\n\n\nA cover drawing should define:<\/p>\n\n\n\n\nMaterial and thickness<\/li>\n\n\n\nOuter dimensions and corner radius<\/li>\n\n\n\nHoles, slots, notches and edge finish<\/li>\n\n\n\nViewing window<\/li>\n\n\n\nBlack mask and printed icons<\/li>\n\n\n\nLogo and color requirements<\/li>\n\n\n\nTransparent indicator windows<\/li>\n\n\n\nBonding and gasket areas<\/li>\n\n\n\nSurface treatment<\/li>\n\n\n\nCosmetic acceptance limits<\/li>\n<\/ul>\n\n\n\nThe printed border must hide adhesive, sensor traces and display structures without clipping the viewing area. Narrow glass features and holes should be reviewed for manufacturing and strength.<\/p>\n\n\n\nAR, AG and AF Solve Different Problems<\/h3>\n\n\n\nAR treatment reduces mirror-like reflection.<\/p>\n\n\n\nAG treatment diffuses reflected light but may soften fine pixels when haze is excessive.<\/p>\n\n\n\nAF treatment reduces visible fingerprints and can improve cleanability.<\/p>\n\n\n\nChoose these treatments from the lighting, resolution and maintenance requirements. Verify chemical resistance against the actual cleaning agents.<\/p>\n\n\n\nOptical Bonding or Perimeter Bonding?<\/h2>\n\n\n\nPerimeter bonding attaches the touch panel or cover lens around its edge, leaving an air gap over the TFT. It is economical and can simplify rework.<\/p>\n\n\n\nOptical bonding fills the gap with transparent adhesive. It can reduce internal reflections, improve perceived contrast and remove the air cavity in which condensation might form.<\/p>\n\n\n\nOptical bonding may be justified for outdoor equipment, strong ambient light, premium optical appearance or mechanically integrated front assemblies.<\/p>\n\n\n\nIt also affects cost, process yield and repair strategy. A bonded stack is normally serviced as a complete assembly rather than as separate layers.<\/p>\n\n\n\nDefine bubble, particle, alignment and cosmetic acceptance criteria before approving the bonded sample.<\/p>\n\n\n\nInterface: Start with the Host Processor<\/h2>\n\n\n\nSelect the display interface from the host’s native capability, graphics workload and cable environment.<\/p>\n\n\n\nCommon small-TFT interfaces include:<\/p>\n\n\n\n\nSPI for low pin count and modest update requirements<\/li>\n\n\n\nMCU or 8080 parallel interface for direct writes and higher throughput<\/li>\n\n\n\nRGB for continuous pixel streaming<\/li>\n\n\n\nMIPI DSI for high bandwidth with fewer differential lanes<\/li>\n\n\n\nLVDS or eDP for selected larger or higher-bandwidth displays<\/li>\n<\/ul>\n\n\n\nHDMI, USB or serial HMI solutions may be provided through a driver or conversion board when the host does not expose the panel’s native interface.<\/p>\n\n\n\nState:<\/p>\n\n\n\n\nProcessor part number and operating system<\/li>\n\n\n\nNative display peripheral<\/li>\n\n\n\nResolution, color depth and frame-rate target<\/li>\n\n\n\nFull-screen or partial-update behavior<\/li>\n\n\n\nLogic voltages<\/li>\n\n\n\nTiming requirements<\/li>\n\n\n\nInitialization commands<\/li>\n\n\n\nPower-up and power-down sequence<\/li>\n\n\n\nBacklight control and dimming<\/li>\n\n\n\nCable length and EMC environment<\/li>\n<\/ul>\n\n\n\nThe connector name is not an interface specification. Pinout, timing, voltage and initialization must all match.<\/p>\n\n\n\nFPC and Connector Customization<\/h2>\n\n\n\nA custom FPC can solve a mechanical conflict without changing the TFT glass.<\/p>\n\n\n\nDefine:<\/p>\n\n\n\n\nExit side and direction<\/li>\n\n\n\nFPC length and bend location<\/li>\n\n\n\nMinimum dynamic or static bend radius<\/li>\n\n\n\nStiffener dimensions<\/li>\n\n\n\nConnector manufacturer and part number<\/li>\n\n\n\nContact side and pin assignment<\/li>\n\n\n\nMating height<\/li>\n\n\n\nRequired shielding or ground features<\/li>\n\n\n\nAssembly and service access<\/li>\n<\/ul>\n\n\n\nDo not fold the FPC across components or force it against a sharp housing edge. Add strain relief where vibration or repeated service movement is expected.<\/p>\n\n\n\nIf the connector position is fixed on the host PCB, provide a 3D envelope or assembly drawing rather than only a two-dimensional panel outline.<\/p>\n\n\n\nMechanical Integration and Tolerance Stack<\/h2>\n\n\n\nDisplay fit should be assessed across the complete assembly, not one nominal drawing.<\/p>\n\n\n\nReview tolerances from the TFT active area through the frame, touch sensor, cover printing, adhesive, bracket and enclosure. A series of acceptable individual tolerances can still place the visible image too close to one edge.<\/p>\n\n\n\nDefine mechanical datums and inspection points. Identify surfaces that can support the module and areas that must remain free of pressure.<\/p>\n\n\n\nAvoid point loading the TFT glass. Uneven screw torque, warped bezels and over-compressed foam can create light leakage, pressure marks, mura or glass damage.<\/p>\n\n\n\nAccount for thermal expansion where the cover lens, plastic housing and metal frame use different materials.<\/p>\n\n\n\nSeparate Requirements from Preferences<\/h2>\n\n\n\nAn RFQ becomes easier to solve when every line has a priority.<\/p>\n\n\n\nUse three labels:<\/p>\n\n\n\n\nFixed: cannot change because of safety, tooling, compliance or host architecture<\/li>\n\n\n\nPreferred: valuable but open to a justified alternative<\/li>\n\n\n\nFlexible: supplier may select from existing platforms<\/li>\n<\/ul>\n\n\n\nExample:<\/p>\n\n\n\nParameter<\/th>Value<\/th>Priority<\/th>Reason<\/th><\/tr><\/thead>Maximum module width<\/td>72.0 mm<\/td>Fixed<\/td>Existing enclosure tool<\/td><\/tr>Resolution<\/td>800 \u00d7 480 preferred<\/td>Preferred<\/td>Current UI layout<\/td><\/tr>Connector position<\/td>Rear, right side<\/td>Flexible<\/td>PCB routing not frozen<\/td><\/tr>Cover logo color<\/td>Brand reference sample<\/td>Fixed<\/td>Product identity<\/td><\/tr>Display interface<\/td>RGB or LVDS<\/td>Flexible<\/td>Host supports both<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\nThis format gives the manufacturer room to find a stable platform without compromising product-critical items.<\/p>\n\n\n\nBuild a Complete RFQ Package<\/h2>\n\n\n\nA strong custom TFT LCD RFQ includes four groups of information.<\/p>\n\n\n\nProduct and Commercial Context<\/h3>\n\n\n\n\nApplication and end market<\/li>\n\n\n\nPrototype, pilot and annual quantities<\/li>\n\n\n\nTarget sample date<\/li>\n\n\n\nExpected production start<\/li>\n\n\n\nRequired supply and service period<\/li>\n\n\n\nTarget market or compliance constraints<\/li>\n<\/ul>\n\n\n\nOptical and Environmental Requirements<\/h3>\n\n\n\n\nSize, resolution and orientation<\/li>\n\n\n\nBrightness measurement point<\/li>\n\n\n\nViewing direction and lighting<\/li>\n\n\n\nColor requirements<\/li>\n\n\n\nOperating and storage temperature<\/li>\n\n\n\nHumidity, shock, vibration and UV exposure<\/li>\n<\/ul>\n\n\n\nElectrical Requirements<\/h3>\n\n\n\n\nHost processor<\/li>\n\n\n\nDisplay and touch interfaces<\/li>\n\n\n\nVoltages and power budget<\/li>\n\n\n\nFrame-rate and update behavior<\/li>\n\n\n\nConnector and pinout<\/li>\n\n\n\nSoftware and driver environment<\/li>\n<\/ul>\n\n\n\nMechanical and Cosmetic Requirements<\/h3>\n\n\n\n\n2D drawing with tolerances<\/li>\n\n\n\n3D file or enclosure envelope where available<\/li>\n\n\n\nFPC and connector position<\/li>\n\n\n\nTouch and cover construction<\/li>\n\n\n\nPrinting and color references<\/li>\n\n\n\nBonding method<\/li>\n\n\n\nCosmetic inspection criteria<\/li>\n<\/ul>\n\n\n\nIf information is unknown, say so. An explicit open item is safer than an assumed requirement.<\/p>\n\n\n\nPrototype Strategy: Answer One Risk at a Time<\/h2>\n\n\n\nTrying to perfect image quality, mechanics, touch tuning and cosmetics in the first bonded sample can make failures expensive and difficult to diagnose.<\/p>\n\n\n\nA staged program is usually easier to control.<\/p>\n\n\n\nStage 1: Electrical Evaluation<\/h3>\n\n\n\nUse a standard or near-standard display to confirm initialization, timing, color order, image orientation, frame rate, sleep, wake and backlight control on the intended host.<\/p>\n\n\n\nStage 2: Mechanical Sample<\/h3>\n\n\n\nConfirm outline, active-area location, connector access, FPC routing and mounting. A non-cosmetic cover sample can validate fit before final printing.<\/p>\n\n\n\nStage 3: Optical and Touch Stack<\/h3>\n\n\n\nAdd the production-intent touch panel, cover thickness, adhesive and surface treatment. Tune PCAP in the real enclosure.<\/p>\n\n\n\nStage 4: Cosmetic Sample<\/h3>\n\n\n\nApprove printing, color, logo, window alignment, particles, scratches, bonding bubbles and edge appearance against written standards.<\/p>\n\n\n\nStage 5: Pilot Build<\/h3>\n\n\n\nRun the assembly process at limited quantity. Record yield, work instructions, test coverage, packaging and any rework before mass production.<\/p>\n\n\n\nThis sequence is not mandatory for every project, but it helps isolate problems before the most expensive configuration is built.<\/p>\n\n\n\nTesting and Acceptance Criteria<\/h2>\n\n\n\n\u201cSample approved\u201d should mean more than the display powers on.<\/p>\n\n\n\nCreate measurable criteria for:<\/p>\n\n\n\n\nActive-area and module dimensions<\/li>\n\n\n\nConnector, FPC and mounting fit<\/li>\n\n\n\nPixel defects<\/li>\n\n\n\nLuminance and uniformity<\/li>\n\n\n\nColor and viewing performance<\/li>\n\n\n\nTouch accuracy and edge response<\/li>\n\n\n\nGlove and water behavior<\/li>\n\n\n\nBonding alignment, bubbles and particles<\/li>\n\n\n\nBacklight dimming<\/li>\n\n\n\nPower consumption<\/li>\n\n\n\nStartup and recovery<\/li>\n\n\n\nOperating-temperature behavior<\/li>\n\n\n\nVibration or shock response where required<\/li>\n<\/ul>\n\n\n\nThe finished equipment manufacturer remains responsible for system-level compliance. Module testing supports that work but does not certify the complete medical, automotive or industrial product.<\/p>\n\n\n\nUse a Golden Sample Carefully<\/h3>\n\n\n\nAn approved golden sample can preserve visual and cosmetic expectations that drawings do not fully capture.<\/p>\n\n\n\nStore it under controlled conditions and link it to a specific drawing, BOM, firmware and approval date. A golden sample without revision control can create disagreement later.<\/p>\n\n\n\nChange Control Before Mass Production<\/h2>\n\n\n\nFreeze the approved configuration before issuing a production order.<\/p>\n\n\n\nThe controlled package may include:<\/p>\n\n\n\n\nModule drawing and revision<\/li>\n\n\n\nBill of materials or controlled critical components<\/li>\n\n\n\nDisplay initialization code<\/li>\n\n\n\nTouch-controller firmware<\/li>\n\n\n\nCover-lens artwork and color reference<\/li>\n\n\n\nBonding stack<\/li>\n\n\n\nCosmetic standard<\/li>\n\n\n\nTest procedure and acceptance limits<\/li>\n\n\n\nPackaging specification<\/li>\n\n\n\nApproved sample record<\/li>\n<\/ul>\n\n\n\nDefine how supplier changes will be communicated and which changes require customer approval or requalification.<\/p>\n\n\n\nSample and Production Timing<\/h2>\n\n\n\nDevelopment time depends on what changes.<\/p>\n\n\n\nSelecting an existing display may take only technical review and sample logistics. Custom FPC, cover glass, touch sensors, backlights or driver boards add drawing, tooling and validation steps. Fully custom TFT glass requires a substantially different commercial and technical commitment.<\/p>\n\n\n\nQIHAN currently publishes these general reference periods:<\/p>\n\n\n\n\nLCM drawing: approximately 2\u20137 days<\/li>\n\n\n\nLCM sample: approximately 3\u20136 weeks<\/li>\n\n\n\nMass production: approximately 4\u201312 weeks<\/li>\n<\/ul>\n\n\n\nThese are not universal promises. Actual timing depends on the module platform, tooling, material availability, customization depth, sample revisions, order quantity and required testing. Confirm the schedule in the quotation for the specific project.<\/p>\n\n\n\nWhat Commonly Delays a Custom Display Project?<\/h3>\n\n\n\nFrequent causes include:<\/p>\n\n\n\n\nEnclosure tooling frozen before the display drawing<\/li>\n\n\n\nUnconfirmed processor or interface<\/li>\n\n\n\nCover artwork without controlled color references<\/li>\n\n\n\nGlove or wet-touch requirements added after tuning<\/li>\n\n\n\nBrightness specified at the wrong optical surface<\/li>\n\n\n\nMechanical changes after optical bonding<\/li>\n\n\n\nMissing acceptance criteria<\/li>\n\n\n\nForecast or MOQ discussed only after engineering begins<\/li>\n<\/ul>\n\n\n\nMost of these delays can be prevented by a complete initial specification and staged approval.<\/p>\n\n\n\nWhat to Expect from a TFT Display OEM Partner<\/h2>\n\n\n\nA useful supplier does more than quote the closest diagonal size.<\/p>\n\n\n\nBefore design freeze, expect clear discussion of:<\/p>\n\n\n\n\nWhich requirements match a standard platform<\/li>\n\n\n\nWhich changes require tooling<\/li>\n\n\n\nWhich tolerances are critical<\/li>\n\n\n\nWhich performance is proven and which requires validation<\/li>\n\n\n\nWhat the sample will and will not represent<\/li>\n\n\n\nWhich test data applies to the exact construction<\/li>\n\n\n\nWho controls firmware and drawings<\/li>\n\n\n\nHow changes and end-of-life events are handled<\/li>\n<\/ul>\n\n\n\nIf a requirement cannot be confirmed, it should remain an open item rather than being converted into a marketing claim.<\/p>\n\n\n\nHow QIHAN Supports Custom TFT LCD Projects<\/h2>\n\n\n\nQIHAN is a manufacturer and supplier of small and medium-sized TFT LCD modules from 0.96 to 15.6 inches for industrial, medical, automotive, HMI and embedded applications.<\/p>\n\n\n\nQIHAN’s published OEM and ODM capabilities include project-based customization of display size, resolution, brightness, interface, backlight, touch panel, cover lens, FPC, optical bonding, PCB and mechanical structure.<\/p>\n\n\n\nThe company also publishes production capabilities covering TFT processing, backlight assembly, capacitive-touch assembly and TFT-to-CTP optical bonding.<\/p>\n\n\n\nAvailable dimensions, performance, MOQ, tooling and development time depend on the selected TFT platform and the parts that become custom. They should be confirmed in the project drawing and quotation.<\/p>\n\n\n\nFrequently Asked Questions<\/h2>\n\n\n\nWhat information should I send to a TFT LCD manufacturer?<\/h3>\n\n\n\nSend the application, visible area, maximum outline, resolution, brightness, operating environment, host processor, interface, touch requirement, cover-lens drawing, expected quantity and target schedule. Mark fixed and flexible requirements.<\/p>\n\n\n\nDo I need a fully custom TFT LCD?<\/h3>\n\n\n\nOften, no. A standard panel with a custom FPC, backlight, touch panel, cover lens or interface board may solve the integration problem with lower tooling and qualification risk.<\/p>\n\n\n\nCan the display size be customized?<\/h3>\n\n\n\nThe external module, cover lens and integration features can often be adapted. A unique active area or TFT glass size is a deeper customization that depends on tooling, technical feasibility and volume.<\/p>\n\n\n\nCan QIHAN customize the display interface?<\/h3>\n\n\n\nQIHAN supports project-based interface and FPC customization as well as driver-board and interface-conversion solutions. Compatibility must be checked against the host processor, timing and software environment.<\/p>\n\n\n\nHow long does a custom TFT LCD sample take?<\/h3>\n\n\n\nQIHAN publishes approximately 3\u20136 weeks as a general LCM sample reference. A standard sample may be quicker, while a complex touch, cover, bonding or full-custom project may require more time. Use the project quotation as the controlling schedule.<\/p>\n\n\n\nWhat is the MOQ for a custom TFT display?<\/h3>\n\n\n\nThere is no single MOQ. It depends on whether the project uses a standard module, custom FPC, dedicated backlight, touch sensor, cover lens or new TFT glass. Share prototype, pilot and annual-volume estimates early.<\/p>\n\n\n\nCan a custom display be used in automotive or medical equipment?<\/h3>\n\n\n\nIt may be designed for those applications, but the required qualification, documentation and system compliance must be defined for the specific product and market. A general custom-module description is not proof of certification.<\/p>\n\n\n\nWho is responsible for final product testing?<\/h3>\n\n\n\nThe display supplier validates the agreed module requirements. The equipment manufacturer is responsible for verifying the complete product, including EMC, safety, environmental performance and applicable regulatory compliance.<\/p>\n\n\n\nDefine the Product Before Asking the Display to Fit It<\/h2>\n\n\n\nA custom TFT LCD display project works best when the product team and supplier solve the constraints together.<\/p>\n\n\n\nFreeze the visible area before the bezel. Match resolution to real content. State where brightness is measured. Select touch from the operator’s hands. Treat the cover lens as an optical and mechanical component. Match the interface to the host, and validate risk in stages before approving mass production.<\/p>\n\n\n\nQIHAN can review your mechanical envelope, host interface, lighting, touch, cover and production requirements to identify whether a standard, semi-custom or fully customized LCD module is appropriate.<\/p>\n\n\n\nSend your custom TFT LCD specifications to QIHAN<\/a>.<\/strong><\/p>","protected":false},"excerpt":{"rendered":"The fastest way to delay a custom TFT LCD display project is to begin with an incomplete specification. A request such as \u201cWe need a five-inch industrial screen with touch\u201d leaves most of the engineering work undefined. The active area may not fit the enclosure. The processor may not support the panel interface. The selected […]<\/p>\n","protected":false},"author":1,"featured_media":1459,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_gspb_post_css":"","footnotes":""},"categories":[26],"tags":[],"class_list":["post-1444","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-lcd-display-news"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/qihantech.com\/pt\/wp-json\/wp\/v2\/posts\/1444","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/qihantech.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/qihantech.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/qihantech.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/qihantech.com\/pt\/wp-json\/wp\/v2\/comments?post=1444"}],"version-history":[{"count":2,"href":"https:\/\/qihantech.com\/pt\/wp-json\/wp\/v2\/posts\/1444\/revisions"}],"predecessor-version":[{"id":1462,"href":"https:\/\/qihantech.com\/pt\/wp-json\/wp\/v2\/posts\/1444\/revisions\/1462"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/qihantech.com\/pt\/wp-json\/wp\/v2\/media\/1459"}],"wp:attachment":[{"href":"https:\/\/qihantech.com\/pt\/wp-json\/wp\/v2\/media?parent=1444"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qihantech.com\/pt\/wp-json\/wp\/v2\/categories?post=1444"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qihantech.com\/pt\/wp-json\/wp\/v2\/tags?post=1444"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}](\"https:\/\/qihantech.com\/wp-content\/uploads\/2026\/05\/TFT-LCD-Module.png\"){kind=link}