测试规范

目的

确保公司产品符合客户要求,为产品检验提供依据,保证产品质量。

适用范围

本标准适用于XX生产的所有TFT模组产品。

检测设备

电测机、测试治具、放大镜、荧光灯、游标卡尺

取样计划和检查环境条件

制造单位(或工艺QC)对外观检验和电气性能测试进行全检,尺寸测量或特殊检验,每个型号的第一件取样测试5件。

质量单位每款首样测量5个,外观检验采用GB/—2012正常检验一次性抽样方案,一般检验等级为II级。

不合格等级 允许水平(AQL) 合格的质量标准评估
主要不足   如果尺码有缺陷,0收1退
顺从  
全部的

考官需要戴静电环,双手戴八个手指套。如果是没有贴偏光片的液晶显示器,所有手指都应该戴上手指套。

检查者可以目视检查或与胶片对照表进行比较。

使用测试夹具和显示屏进行电气测试,请参考样本。

检验员的眼睛与产品的距离为30~40 cm。检查视角为垂直显示面板正面±15度,水平显示面板正面±45度(见下图)

tft img1

环境照明:800~1200LUX 目视检查

环境温度:25±5℃

湿度:25~75% RH

检查项目

(1) 内部面板引起的点缺陷的定义。

a) 亮点:LCD 上黑色图案下方出现明亮的、大小恒定的点。

b) 暗点:在纯红、绿、蓝画面中,LCD 上出现大小相同的暗点。

c) 相邻的 2 个点 = 1 对 = 2 个点。

tft img2

显示支票

物品 描述 可接受数量 少校 最小
强调 随机的 N≤3  
两个相邻点 N≤0
两个相邻点 N≤0
距离 两个亮点之间的最小距离 5mm
黑点 随机的 N≤4  
两个相邻点 N≤0
两个相邻点 N≤0
黑点和亮点的总数 N≤6  
距离 两个亮点(暗点)之间的最小距离 5mm  
小亮点 D≤can be ignored,<D≤, N≤4,spacing≧5mmD(Point diameter) √ 
Show fault V/H line/line crossover line etc. Not allowed  
Chromatic aberration, uneven; ripple; hot spot Pass 5% filter under 50% dark light Invisible, can be judged by limit sample if necessary    

*Note: Defects on the black matrix (outside the active area) are not considered defects

Visual inspection

物品 描述 可接受数量 少校 最小
Point defect (display and appearance) Black spots, white spots, bright spotstft img4 D≤ignorable, <D≤, N≤4, spacing ≥5mm (Figure 2)  
Bad linearity (display and appearance) Black line, white line, bright line tft img5 W≤ignorable, <W≤,L≤, N≤4,  
Polarizer defect Dents, bubbles D≤ignorable, <D≤, N≤4,  
Scratch W≤ignorable,<W≤,L≤, N≤4  
Panel crack  tft img6 Not allowed
Damaged TFT non-lead side  tft img7 The distance between the minimum break point area, d1≧, cannot be ignored; d1<, N≦0d 1: the minimum distance between the break point area and the dot area
Damaged TFT pin side  tft img8 The alignment mark is damaged, the damaged angle>90  
W≦,L is ignored, but the pin cannot be damaged
W≦, (D depth)≦1/2 (1 layer glass thickness)
Damaged TFT lead side corner  tft img9 The swastika cannot be damaged. W≦,L≦5mm  
TFT / CF edge burr  tft img10 d2≦d 2: The distance between the burr and the edge of the TFT  
other Poor sealing glue Height: no more than length: no more than 80mm, the sealing glue must completely cover the crystal filling mouth and the penetration depth is greater than  
LCD dimensions The size refers to the design specification, the tolerance is ± mm, if it exceeds the tolerance range, it is unqualified  
The liquid crystal is not completely poured into the box Not allowed  
Gas enters the box during crystal filling Not allowed  
Smudge Stain that cannot be wiped off is not allowed to have liquid crystal on the surface or in the glass gap  
Module appearance Newton ring

tft img11

There are Newton rings and interference lines on the touch screen, rejected  
 tft img12 The pattern font is clear, the font line becomes thicker or thinner than the normal line width ≤1/3 (and ≤+/), no hyphenation. accept  
Drums on the touch screen Acceptable without affecting writing  
There are fish-eye bubbles on the surface of the touch screen FILM According to the inspection standard of the touch screen  
Poor assembly Module assembly does not match the assembly instructions Reject  
Poor assembly The assembly does not meet the process requirements (fixed double-sided tape or shading tape is not attached, etc.) Reject  
The connection between the components is not strong (the glass is separated from the backlight, etc.) Reject  
Defects when attaching transfer paper Insufficient adhesion to tear off the protective film Reject  
Attach position Does not meet the specifications, rejected  
Attaching angle Attached to the edge of the LCD edge angle is greater than ±15 degrees, rejected  
Poor coding   Does not meet the document requirements  
Other items PCBA, HSC, FPC, backlight, etc. Refer to "LCM Finished Product Inspection Specification" ~ conduct inspection    

Remarks:

1. Ignore any defects on the protective film of the polarizer, such as scratches, bubbles and particles on the protective film.

2. The angle of all damage must be greater than 90 degrees as shown on the right.

3. If the customer has specified requirements according to customer requirements.

tft img3