ate voltage test system and ate voltage test method

Abstract

The invention provides an ATE voltage testing system and an ATE voltage testing method. The system measures an output voltage of an output board (2) through a computer (3), compares the output voltage of the output board (2) with a preset qualified voltage range, and obtains a testing result. When the testing result is that the measured output voltage of the output board (2) is not within the qualified voltage range, a control signal is transmitted to a testing tool plate (1). The testing tool plate (1) adjusts the output voltage of a to-be-tested PCBA according to the control signal according to a I2C connection line, and transmits the adjusted output voltage of the PCBA to the output board (2), thereby adjusting the output voltage of the output board (2) in the preset qualified voltage range. The system can effectively improve the ATE voltage testing qualified rate, improves the yield of PCBAs, reduces the rejection rate, also can be used for managing and controlling a more precise gamma voltage value, and guarantees that the PCBA obtains a better display effect through cooperating with a panel in the subsequent process.

Description

technical field [0001] The invention relates to the field of display device testing, in particular to an ATE voltage testing system and an ATE voltage testing method. Background technique [0002] In the field of display technology, flat panel display devices such as Liquid Crystal Display (LCD) and Organic Light Emitting Diode (OLED) have gradually replaced Cathode Ray Tube (CRT) displays. [0003] Most of the liquid crystal displays currently on the market are backlight liquid crystal displays, which include a liquid crystal display panel and a backlight module. The liquid crystal display panel includes a thin film transistor array substrate (ThinFilm Transistor Array Substrate, TFT Array Substrate) and a color filter substrate (ColorFilter, CF) disposed opposite to each other and a liquid crystal layer filled between them. The liquid crystal display includes a plurality of pixels arranged in an array, each pixel is electrically connected to a thin film transistor (TFT), ...

AI Technical Summary

Problems solved by technology

In fact, the voltage output of the PWM IC and P-Gamma IC in the PCBA has certain errors, and even the error range may exceed the range of the target voltage, so in many cases, various voltages out of range will appear in the ATE test of the PCBA. The problem is that the defect rate will be very high, resulting in the scrapping of the PCBA or the corresponding IC. The solution is to re-take the PCBA or IC for repair, change the IC, etc., which is time-consuming and laborious, and increases the cost.

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