Touch Panel简介PPT课件

1、2021/3/91講師講師: :蔡利煌蔡利煌(Louis Tsai)(Louis Tsai)2008/3/262008/3/262021/3/92觸控技術依感應原理可分為電阻式（Resistive）電容式（Capacitive）音波式（Surface Acoustic Wave） 紅外線式(IR)光學式（Optics）等本文將針對公共使用（Public Application）層面應用較廣的電阻式技術原理作介紹。2021/3/93是由一層導電玻璃(ITO glass)及一層導電薄膜(ITO Film)所組成Allows finger, gloved-hand, and stylus input

2、 applications市場推動方向為=運用於攜帶型行動,公共領域,軍用,醫療,特殊環境等2021/3/94觸控面板之結構 主要可以分成三大部分：面板、控制系統與軟體，控制系統與軟體主要是計算碰觸之位置並將所代表之指令訊號傳予系統後加以動作，其牽涉到IC控制與軟體設計 Driver cdTouch Panelcontroller2021/3/95異方性導電膠(ACF) 隔點( DOT SPACER)膠(ADHESIVE)導電薄膜(ITO FILM)導電玻璃(ITO GLASS)絕緣(ISOLATION) 導電層 (ITO)銀線觸控面板架構觸控面板架構排線排線 (TAIL)2021/3/96導

3、電薄膜導電薄膜 (ITO FILM)絕緣油墨絕緣油墨 (ISOLATION INK)銀膠銀膠 (SILVER PASTE).膠膠 (ADHESIVE)排線排線 (TAIL)導電玻璃導電玻璃 (ITO GLASS)隔點隔點 (DOT SPACER)絕緣油墨絕緣油墨 (ISOLATION INK)銀膠銀膠 (SILVER PASTE).膠膠 (ADHESIVE)2021/3/97導電薄膜導電薄膜ITO FILM下料IssueMaterials絕緣切割IsolationCutting絕緣印刷IsolationPrinting銀線印刷Silver PastePrinting貼護膜Film Protec

4、t膠印刷AdhesivePrinting切割FilmCutting檢驗Inspection導電玻璃導電玻璃ITO GLASS下料IssueMaterials清洗Cleaning防蝕印刷E/MPrinting蝕刻去墨Etching&Stripping銀線印刷Silver PastePrinting檢驗Inspection切割GlassCutting絕緣印刷IsolationPrinting排線壓合TailLamination組合F&GAssembly線性測試Linearity Test上加強膠UV GlueOverlay檢驗Inspection包裝Package出貨Shippin

5、g排排 線線 TAIL膠印刷AdhesivePrinting隔點印刷DotPrinting老化anneal可撥膠印刷SMPrinting觸控面板製作流程觸控面板製作流程2021/3/98Cross-sectional ViewFilm thin plastic top sheetITO glassSpacer dotsAdhesiveSilver PasteIsolationConductive Coatings on Top sheet and bottom layerFinger or pen flexes top sheet to contact bottom layer2021/3/9

6、9Reading Y-PositionxyInput VoltageVout2021/3/910Reading X-PositionInput VoltageVoutxy2021/3/911X軸方向以表面薄膜(ITO Film)為主Y軸方向以表面薄膜(ITO Glass)為主5V 4V 3V 2V1V 0V13245v4v3v2v1v4 Wire 動作原理2021/3/912Design Guide 依客戶需求設計，目前可提供樣品尺寸大小為1.5”21”之間。Viewing AreaTouch Panel之不透明的區域，此區域須確保外殼完全覆蓋，避免有裸露的情形，一般可設計與LCD V/A相同

7、。Transparent Area 介於Viewing Area與Active area之間，此區域最主要是為防止組裝不良的偏移而導致Touch Panel短路而設計，一般為Viewing Area往外0.5,Active Area往外0.3mm。預留此區域，可令ITO-FILM Crack 達到最小Active Area 實際LCD ICON設計之動作區，亦是Touch Panel動作保證區，一般而言Touch Panel之Active Area會比LCD之Active Area來得大0.3mm。2021/3/913Design Guide2021/3/914Suggest Mechanic

8、al Design Touch Panel有gap約0.30.7mm，請勿直接接觸film表面，避免有誤動作產生。2021/3/915 可程式線性測試機 可程式控制技測試機 恆溫恆濕機, 高溫試驗機, 低溫試驗機, 冷熱衝擊試驗機 做動力測試機, 作動時間測試機 透光率測試機 打點測試機 絕緣壽命測試機 可程式震動測試機, 靜態荷重測試器, 撞擊測試器, 繞折測試器 表面硬度測試器品質控管品質控管主要測試設備出廠前的全檢出廠前的全檢, , 是理義對客戶的承諾與自我的要求是理義對客戶的承諾與自我的要求. .2021/3/916Liyitec Touch Panel Specifications

9、Mechanical Optical Electrical Cosmetic Environmental2021/3/917Mechanical CharacteristicItemConditionSpecification(1)Oper. ForceStylus R0.8 50g(2)Impact22 steel ball, 45g, Height 30cm1 time, no damage(3)HardnessMeet JIS K5400 3H(4)Static Load25kg at 10 areafor 30 secSatisfy (1) and elec. characterist

10、ic (5)KnockR8 rubber Tip, 250 g1,000,000 timesSatisfy (1) and elec. characteristic2021/3/918Optical CharacteristicItemConditionSpecification(1)TransparencyBy BYK-Gardner instrument 82%(Above)(2)Newton Ring17w fluorescent lamp, 30cm away from eyesAs per actual samples provide2021/3/919Electrical Char

11、acteristicItemSpecification(1) Linearity 1.5%(2) Insulation 20M(3) Contact Bounce 30ms2021/3/920Environment CharacteristicItemTemperatureHumidity(1) Operation-20 +70 20% 85% RH(2) Storage-30 +80 10% 90% RH2021/3/921Defect Mode外觀異常(點,線,面)線性異常(線性偏移)X,Y絕緣異常與接地線短路FPC Bonding Area trace crackNoise issue2

12、021/3/922外觀異常(刮傷)2021/3/923 Check the outline: The outline has Newton ring at center position of T/P.2. Analysis & Verification 外觀異常(Newton ring)2021/3/924Failure Mechanism Explanation : The structure of between T/P and LCD as below figure, we think the Newton ring was caused by T/P too near the

13、 LCD at center position.cross section paneldouble tapefront bezeldouble tapeT/PNewton ring牛頓環產生原因牛頓環產生原因中文說明中文說明 在光學上，牛頓環牛頓環是一個薄膜干涉現象。將一塊平凸透鏡放在一塊平面透鏡上，將單色光直射向凸鏡，可以觀察到一個個圓環條紋。考慮空氣射入平凸透鏡時的反射光和平面透鏡的內部反射的光發生干涉（注意，由空氣射入平凸透鏡時的反射，以及平面透鏡的內部反射光是不在考慮之列的）。空氣射入平凸透鏡時的反射光有180度相位改變。平凸透鏡和平面透鏡之間的空間薄膜的距離：當相長干涉發生時:文件參

14、考:牛頓環牛頓環 - Wikipedia2021/3/925Measured the T/P linearity function, the linearity function showed out of specification. And the measurement data was shown as following table. According to the measurement result, the T/P of returned samples was abnormal.Diagram : front sideMeasure areaX directionY dir

15、ectionLine linear test#1ResultSpecificationX- 1.5% X+1.5%Y- 1.5% Y20Mohm)XL - Yu(SPEC : 20Mohm)XR - YL(SPEC : 20Mohm)XR - Yu(SPEC : 20Mohm)Sample 1627 ohm424 ohm614 ohm1.06 k ohm14 ohm438 ohmSample 2614 ohm417 ohm4.41k ohm4k ohm5k ohm4.6k ohmYU XL YL XR2021/3/928We checked the unknown matter by EDX,

16、 this was Na and Cl element , so we thought it was salt. NaClX,Y絕緣異常2021/3/929Step 3: Measured isolation resistance : Checked Isolation resistance of T/P (X,Y) : These were normal.a.Measured resistance of T/P with LCM GND : We found Yu and Yd pin of touch panel with GND (shield case) was short.The Y

17、u pin with GND short14.7 YuYDXRXLThe XR pin was normal.The XL pin was normal.The Yd pin with GND short2021/3/930 We found FPCa with shield case was overlap by OM checked.The normal sample with a gap (0.32mm) between FPCa and shield case.This position was no gap.Abnormal sampleThe check T/P hot bar a

18、rea.Normal sampleGap0.32mmShield caseFPCaShield caseFPCaStep 4: Checked Hot bar area : 與接地線短路2021/3/931Step 5: Removed shield case : Remove shield case , measured Yu /Yd between GND resistance , it was open.Checked FPCa and ground was shown open.2021/3/932Step 6: Checked FPCa : a. Checked T/P hot ba

19、r area edge of FPCa was could measured the terminal resistance.b. Found Cu was naked out of FPCa at T/P hot bar area edge by OM checked. XRXLYuYDThe top view check Cu condition:CuCuCuCu50 xThe FPCa edge could measured the terminal resistance.2021/3/933Step 7: Compared FPCa assembly: This position wa

20、s no gap.Abnormal sampleNormal sampleGapThe down site assembly.The up site assembly.Check FPCa assembly : The defect sample assembly at frame up side , but normal sample assembly at frame down site. The different assembly caused to FPCa edge overlap shield case. 2021/3/934a.The resistances was show

21、open when measuring from hot bar area to shield case. But resistances was became short when pressing shield case. b.The samples assembly to customer machine could reproduce defect phenomenon. So, The defect was caused by T/P of FPCa edge was short with shield case. Assembly to smart phone the T/P wa

22、s NG.Defect Enhance & Reproduce method : N/AThis no press was normal.The press shield case was abnormal.FPCa overlap.2021/3/935Description of phenomenonDefect mode: MA53 Touch panel no function on LGE in-line fail.The defect panel was showed T/P no function與接地線短路2021/3/9362-5. Check open/short o

23、n gold finger : we found XR or XL had short with GND. ( resistance 38K ohm) , normal sample was open (mega ohm) XLXRYUYL#138Kopenopenopen#2open40Kopenopen#325Kopenopenopen2-6. Check the XL/XR/YU/YL trace and soldering area on FPCa by X-ray , but we could not find any short area. XLYLYUXR#1 ( XL shor

24、t with GND)X-ray inspectionOM inspectionUnit : ohm2021/3/937Checked the impedance of gold finger side with multi-meter, the X side impedance showed open. And the measurement result was shown as following table. (Impedance spec. of tpo：100 X1100 100 Y1100) Measurement pointsGold fingerSampleT/P imped

25、anceResultXY#1Open397.4 NGY- impedanceX- impedanceFPC Bonding area2021/3/938Used OM to check the XR hot bar pin of T/P FPC, the XR pin showed crack. And the observation result was showed as the following pictures. According to the measurement, experiment and observation result, the T/P function fail

26、 phenomenon resulted from XR hot bar pin crack issue.CrackXR2021/3/939Noise issue:Static electricity between panel & T/P surface2021/3/9402021/3/9412021/3/9422021/3/943Toppoly11/28/06 10:29:173.5 inch COG EC1 Panel.ats2-20+60-15-10-5+0+5+10+15+20+25+30+35+40+45+50+55-11.182+10.301dBr A2k20k4k6k8

27、k10k12k14k16k18k11.3487k9.5105kHz 3. The noise was about 10.3dB when the panel was measured by the ATS-2 (Noise Audio Test System) as the below figure. (tpo specification Noise 10dB)About 10.3dB2021/3/944 4. The static electricity were measured on the surface of T/P (glass side) and panel with Elect

28、rostatic field-meter when T/P and panel has already been taken apart. Using ion-fan to remove static electricity and measured static electronic again. The static electricity were decreasing when used the ion-fan, the measure data was shown as the below table. T/P surfacePanel surfaceBefore using ion

29、-fan0.630.15After using ion-fan (about 3minutes)0.050.03units: KV/inch2021/3/945Toppoly11/28/06 10:52:453.5 inch COG EC1 Panel.ats2-20+60-15-10-5+0+5+10+15+20+25+30+35+40+45+50+55-13.136-5.033dBr A2k20k4k6k8k10k12k14k16k18k11.3487k9.5105kHz 5. The T/P and panel were fabricated and measured the noise again. The noise was about 5dB by the ATS-2 as the below figure. About 5dB2021/3/946units: db/inch初始值3hr16hr以上 T/PPanelNormal sample10.63611.0468.705 0.245KV 0.23KVAbnormal Sample(撕保護膜前/後)9.865/10.48210.48220.521.拆開T/P量測Panel/組