CN111025699A - System and method for testing GAMMA curve - Google Patents
System and method for testing GAMMA curve Download PDFInfo
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- CN111025699A CN111025699A CN201911368428.0A CN201911368428A CN111025699A CN 111025699 A CN111025699 A CN 111025699A CN 201911368428 A CN201911368428 A CN 201911368428A CN 111025699 A CN111025699 A CN 111025699A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
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Abstract
The invention relates to a system for testing a GAMMA curve, which comprises a drive board, a main control device, a power supply, a test display screen and a brightness test instrument, wherein the drive board is connected with the power supply, one end of the drive board is connected with the main control device, and the other end of the drive board is connected with the test display screen; the brightness test instrument is provided with a test probe, the test probe and the test display screen are in wireless touch, the test probe is used for detecting the test display screen, and the brightness test instrument is connected with the main control device and belongs to the technical field of electronics. The GAMMA curve can be rapidly tested, the operation time is saved, the debugging efficiency is improved, and the product development period is shortened.
Description
Technical Field
The invention relates to a system and a method for testing a GAMMA curve.
Background
The display is an important interface for communication between people and machines, and the LCM Liquid Crystal Display (LCD) has the advantages of clear and fine image, no flicker, no eye injury, no radiation, low power consumption, light weight and the like. The display device is widely applied to various display fields.
Since human eyes do not have linear perception of brightness change (perception of low brightness change is more acute than perception of high brightness change), when debugging a display screen, human correction is needed to adapt to the objective characteristics of human eyes, so that the picture is most suitable for human eyes to observe. This debugging process is called GAMMA curve debugging. The GAMMA curve is a relationship curve made by measuring the brightness corresponding to different gray levels. Referring to fig. 1 to 3, different GAMMA curves are shown, and when a general liquid crystal display is debugged, the GAMMA curve can be debugged to meet 2.2+ 0.3.
Currently testing the GAMMA curve, a manual method is adopted, and firstly, relevant equipment is prepared: luminance test equipment, display screen and driver board, power supply, etc. (see fig. 4). During testing, manually cutting different gray scale pictures (from 0 gray scale to 256 gray scale) by pressing an up-down turning key, measuring the brightness of each picture by using a brightness testing instrument, recording the brightness, finally inputting the measured data into a computer, drawing a GAMMA curve through data processing software, and comparing the GAMMA curve with the 2.2 curve. If the curve does not meet the specification, the test code in the drive board needs to be adjusted for retesting. As 256 gray-scale pictures need to be tested each time, all manual tests consume much time and have low debugging efficiency.
Disclosure of Invention
The invention aims to provide a method for testing a GAMMA curve, which aims to solve the problems that the existing method for debugging the GAMMA curve is low in efficiency, needs more manual operation and wastes time.
A GAMMA curve testing system comprises a driving board, a main control device, a power supply, a testing display screen and a brightness testing instrument, wherein the driving board is connected with the power supply, one end of the driving board is connected with the main control device, and the other end of the driving board is connected with the testing display screen; the brightness test instrument is provided with a test probe, the test probe and the test display screen are in wireless touch, the test probe is used for detecting the test display screen, and the brightness test instrument is connected with the main control device.
Furthermore, the driving board is provided with a power switch, an upturning key and a downturning key.
Furthermore, the master control device is provided with an upper computer system, the upper computer system comprises an upper computer control module, a data processing (drawing) module and a data collecting module, the upper computer control module simultaneously transmits control signals to the drive plate and the brightness test instrument, the brightness test instrument transmits the fed-back brightness test signals to the data collecting module, and the data collecting module transmits collected real-time data information to the data processing (drawing) module.
Furthermore, the brightness test instrument is provided with a data display window.
A testing method for testing a GAMMA curve system comprises the following steps:
A. turning on a power supply to adjust the initial state, starting an upper computer system in the main control device to execute a measurement instruction, controlling a drive board to be switched to a 0 gray scale picture by the upper computer system, and controlling a brightness test instrument to measure the brightness of the 0 gray scale picture by the upper computer system and read back to the upper computer system;
B. and analogizing in sequence, if the operation step in the step A is to measure a 256-gray-scale picture from a 0-gray-scale picture, and automatically drawing a GAMMA curve graph after all data are collected in an upper computer system.
The beneficial effect of adopting above-mentioned technical scheme is: the GAMMA curve can be rapidly tested, the operation time is saved, the debugging efficiency is improved, and the product development cycle is shortened.
Drawings
Figure 1 is a graph of GAMMA 1.0;
figure 2 is a graph of GAMMA 2.5;
figure 3 is a graph of GAMMA 2.2;
FIG. 4 is a schematic diagram of a prior art test method;
FIG. 5 is a schematic diagram of the improved testing method of the present disclosure;
fig. 6 is a schematic block diagram of an upper computer system in the improved testing method in the present disclosure.
Detailed Description
The invention will be further described with reference to the accompanying drawings and preferred embodiments thereof. The examples are given solely for the purpose of illustration and are not intended to limit the scope of the invention.
As shown in fig. 5 to 6, in the system for testing a GAMMA curve in this embodiment, the system includes a driving board, a main control device, a power supply, a test display screen, and a brightness testing instrument, the driving board is connected to the power supply, one end of the driving board is connected to the main control device, and the other end of the driving board is connected to the test display screen; the brightness test instrument is provided with a test probe, the test probe is in wireless touch with the test display screen, the test probe is used for detecting the test display screen, and the brightness test instrument is connected with the main control device; in the scheme, the driving board is provided with a power switch, an upturning key and a downturning key, and the starting of the whole system is started through the power switch key during specific operation, wherein the upturning key and the downturning key are respectively used for adjusting 0 gray scale to 256 gray scale values; in the scheme, the main control device is provided with an upper computer system, the upper computer system comprises an upper computer control module, a data processing (drawing) module and a data collecting module, the upper computer control module simultaneously transmits control signals to the drive plate and the brightness test instrument, the brightness test instrument transmits the fed-back brightness test signals to the data collecting module, the data collecting module transmits collected real-time data information to the data processing (drawing) module, and in the specific operation, the automatic control is mostly directly performed through the upper computer control module of the upper computer system in the main control device in order to save time and improve test efficiency, so that the complicated operation of manually switching an up-turning key and a down-turning key can be saved; in the scheme, the brightness test instrument is provided with a data display window for displaying specific data of different tests.
The testing method for testing the GAMMA curve system comprises the following steps:
A. turning on a power supply to adjust the initial state, starting an upper computer system in the main control device to execute a measurement instruction, controlling a drive board to be switched to a 0 gray scale picture by the upper computer system, and controlling a brightness test instrument to measure the brightness of the 0 gray scale picture by the upper computer system and read back to the upper computer system;
B. and analogizing in sequence, if the operation step in the step A is to measure a 256-gray-scale picture from a 0-gray-scale picture, and automatically drawing a GAMMA curve graph after all data are collected in an upper computer system.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. A system for testing a GAMMA curve, comprising: the system comprises a driving board, a main control device, a power supply, a test display screen and a brightness test instrument, wherein the driving board is connected with the power supply, one end of the driving board is connected with the main control device, and the other end of the driving board is connected with the test display screen; the brightness test instrument is provided with a test probe, the test probe and the test display screen are in wireless touch, the test probe is used for detecting the test display screen, and the brightness test instrument is connected with the main control device.
2. The system for testing the GAMMA curve of claim 1, wherein: the driving board is provided with a power switch, an upturning key and a downturning key.
3. The system for testing the GAMMA curve of claim 1, wherein: the main control device is provided with an upper computer system, the upper computer system comprises an upper computer control module, a data processing (drawing) module and a data collecting module, the upper computer control module simultaneously transmits control signals to the drive plate and the brightness test instrument, the brightness test instrument transmits the fed-back brightness test signals to the data collecting module, and the data collecting module transmits collected real-time data information to the data processing (drawing) module.
4. The system for testing the GAMMA curve of claim 1, wherein: the brightness test instrument is provided with a data display window.
5. The method for testing a GAMMA curve system as claimed in any one of claims 1 to 5, wherein the method comprises the following steps:
A. turning on a power supply to adjust the initial state, starting an upper computer system in the main control device to execute a measurement instruction, controlling a drive board to be switched to a 0 gray scale picture by the upper computer system, and controlling a brightness test instrument to measure the brightness of the 0 gray scale picture by the upper computer system and read back to the upper computer system;
B. and analogizing in sequence, if the operation step in the step A is to measure the 255 gray-scale picture from the 0 gray-scale picture, and automatically drawing a GAMMA curve graph after all data are collected in an upper computer system.
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| CN201911368428.0A CN111025699A (en) | 2019-12-26 | 2019-12-26 | System and method for testing GAMMA curve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115588391A (en) * | 2022-08-31 | 2023-01-10 | 中航华东光电有限公司 | Automatic GAMMA curve testing system and method |
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| CN207264759U (en) * | 2017-10-16 | 2018-04-20 | 广州微伟电子实业有限公司 | It can receive the display that computer corrects colour temperature and GAMMA curves automatically by DDC agreements |
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| KR20070075816A (en) * | 2006-01-16 | 2007-07-24 | 삼성전자주식회사 | Gamma correction device and method for gamma correcting therof |
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Application publication date: 20200417 |