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Alternating-current test method and system for relation curve of voltage and transmittance of liquid crystal display (LCD) module

A test method and voltage technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems that ModuleV-T AC testing is difficult to achieve

Inactive Publication Date: 2015-04-29
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the main purpose of the present invention is to provide a kind of AC testing method and system of Module V-T, to solve the problem that the AC testing of Module V-T is difficult to realize

Method used

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  • Alternating-current test method and system for relation curve of voltage and transmittance of liquid crystal display (LCD) module
  • Alternating-current test method and system for relation curve of voltage and transmittance of liquid crystal display (LCD) module
  • Alternating-current test method and system for relation curve of voltage and transmittance of liquid crystal display (LCD) module

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Embodiment Construction

[0077] The basic thought of the AC testing method of Module V-T of the present invention is, utilizes the AC voltage of square wave form to realize the AC Module V-T test, specifically as figure 1 shown, including:

[0078] Step A. Determine the actual voltage value of the square wave AC voltage that the voltage source needs to output in each test period.

[0079] Before this step, initialize the reference voltage value, voltage deviation value, initial voltage value and voltage change step size needed to determine the actual voltage value; wherein, the initial voltage value is the sum of the reference voltage value and the voltage deviation value; The voltage value, voltage deviation value and voltage change step are preset according to the test requirements.

[0080] Wherein, the actual voltage value includes a high voltage value and a low voltage value; the high voltage value and the low voltage value are symmetrical to the initial voltage value, that is, the output of the...

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Abstract

The invention provides an alternating-current test method and system for Module V-T. The alternating-current test method comprises the following steps of: A) determining the practical voltage value of square wave alternating current voltage which needs to be output by a voltage source in each test period; B) in the Nth test period, sending the Nth practical voltage value to the voltage source, and controlling the voltage source to output corresponding square wave alternating current voltage to pressurize to the Data signal of an LCD (liquid crystal display) module; C) after the Nth test period is finished, measuring and reading the luminance value of the LCD module, and drawing a V-T curve corresponding to the Nth test period according to the Nth practical voltage value and the read luminance value; and D) enabling N to be equal to N+1, and returning to the step B), wherein N is a positive integer. According to the alternating-current test method and system disclose by the invention, the alternating current test of the Module V-T can be realized.

Description

technical field [0001] The present invention relates to a liquid crystal display (LCD, Liquid Crystal Display) module (Module) testing technology, in particular to an LCD module voltage and transmittance relationship curve (Module V-T) AC testing method and system. Background technique [0002] The Module V-T test is to measure the curve relationship between the voltage (V) of the Data signal of the LCD module (Module) and the transmittance (T) of the corresponding LCD panel (Panel) at this time, where the transmittance (T) = The brightness measured by the LCD module / the maximum brightness of the LCD module, the maximum brightness of the LCD module is also measured. [0003] During the Module V-T test, the voltage of the Data signal is provided by the voltage source, and the voltage of the Gate signal is provided by the PCB of the module itself. The voltage of the Data signal is changed by changing the output voltage of the voltage source, thereby changing the brightness of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G01R31/00
Inventor 张智陈维涛张新宇
Owner BOE TECH GRP CO LTD