CN104678602A - Method for testing brightness of liquid crystal screen - Google Patents
Method for testing brightness of liquid crystal screen Download PDFInfo
- Publication number
- CN104678602A CN104678602A CN201310613973.8A CN201310613973A CN104678602A CN 104678602 A CN104678602 A CN 104678602A CN 201310613973 A CN201310613973 A CN 201310613973A CN 104678602 A CN104678602 A CN 104678602A
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- China
- Prior art keywords
- lcd screen
- temperature
- brightness
- test
- briliancy
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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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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
Abstract
The invention provides a method for testing brightness of a liquid crystal screen. The method comprises the following steps: providing a to-be-tested liquid crystal screen; determining predicted brightness and standard uniformity of the liquid crystal screen in an unused state, wherein the liquid crystal screen is placed in a dark room and is electrified, so a backlight module of the liquid crystal screen emits light and keeps for a period of time; measuring a luminous region of the liquid crystal screen, determining a style box position in the measured region and determining a predicted point and the standard uniformity; performing high-temperature aging testing on the liquid crystal screen after the brightness and the uniformity are determined; performing high and low temperature impact testing on the liquid crystal screen after high-temperature treatment; examining the relative predicted point and the standard uniformity maintenance rate of an image of the liquid crystal screen.
Description
Technical field
The present invention relates to a kind of method of testing, particularly relate to a kind of LCD screen briliancy method of testing.
Background technology
LCD(Liquid Crystal Display) liquid crystal display is primarily of TFT and backlight module.TFT(Thin Film Transistor (TFT)) design and the design of each parts of backlight module determine LCD briliancy performance jointly, if LCD in the design process the selection of TFT or backlight module parts or structural design unreasonable, result in LCD after using for a long time, there is deterioration in parts quality, result in the briliancy performances such as the homogeneity of LCD brightness and picture and occur deterioration, often see that dimmed or region property hot spot appears in lcd screen, affect client and use.
Summary of the invention
For the problems referred to above, the object of the present invention is to provide a kind of LCD screen briliancy method of testing that LCD screen shows that ensures.
In order to solve the problems of the technologies described above, the invention provides a kind of LCD screen briliancy method of testing, described method comprises:
LCD screen to be tested is provided;
Determine the step of prediction brightness under described LCD screen unused state and standard homogeneity, wherein, described LCD screen to be placed in dark place and to be energized, make the backlight module of described LCD screen luminous and keep a period of time, and measure described LCD screen light-emitting zone, in measured region, determine nine grids position, and determine future position and standard uniformity coefficient;
To the step determining the described LCD screen high temperature ageing test after brightness and uniformity coefficient;
Described LCD screen after high temperature is carried out to the step of high/low-temperature impact test;
Check the step of the relative future position of described LCD screen picture and standard uniformity coefficient sustainment rate.
Wherein, the backlight module of LCD screen luminous and retention time is 30 seconds.
Wherein, after determining to determine nine grids position in measured region, provide color analysis instrument, determine nine somes brightness of the described LCD screen in nine grids, these nine points are future position; Comparison nine somes brightness also calculates this light-emitting zone area source uniformity coefficient, and this uniformity coefficient is standard uniformity coefficient.
Wherein, the step that the described LCD screen high temperature ageing after determining brightness and uniformity coefficient is tested is comprised for providing high-low temperature chamber and regulating probe temperature and time, is positioned over smooth for described LCD screen in high-low temperature chamber.
Wherein, the temperature of described test is adjusted between 50 DEG C to 70 DEG C, and the time of test is 240 hours.
Wherein, the step of the described LCD screen high temperature ageing test after determining brightness and uniformity coefficient is also comprised time of repose under described LCD screen being positioned over normal temperature after test is no less than 2 hours.
Wherein, high/low-temperature impact test is carried out to the described LCD screen after high temperature and comprises a thermal shock case is provided, described LCD screen qualified for high temperature test is loaded in described thermal shock case, regulate test condition.
Wherein, described test condition is place 30 minutes under temperature-20 DEG C of conditions; Then inversion temperature, is adjusted to 60 DEG C and places 30 minutes by temperature.
Wherein, described temperature transition frequency is greater than 10 DEG C/min, and carries out 100 circulations.
LCD screen briliancy method of testing of the present invention carries out brightness sustainment rate and uniformity test by simulation to the described LCD screen after high temperature ageing and thermal shock, finds the shortcoming of the briliancy poor performance that LCD screen may exist after Long-Time Service.Effectively can filter out LCD screen at defective products such as the brightness of possibility LCD screen are low after Long-Time Service, light is uneven, for product development selects high-quality LCD screen to provide foundation, ensure the quality of described LCD screen.
Accompanying drawing explanation
Fig. 1 is LCD screen briliancy method of testing process flow diagram of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1, LCD screen briliancy method of testing provided by the present invention comprises:
Step S0, provides LCD screen to be tested.
Step S1, determines the brightness under described LCD screen unused state and homogeneity.Specifically comprise: first, described LCD screen to be placed in dark place and to be energized, make the backlight module of described LCD screen luminous, conduction time is 30 seconds.Measure described LCD screen light-emitting zone, and determine nine grids position in measured region.Wherein, represent described light-emitting zone length with X, represent described light-emitting zone width with Y.Determine nine grids coordinate position, provide foundation for LCD screen picture homogeneity measures.Then, provide color analysis instrument, determine nine somes brightness of the described LCD screen in nine grids, these nine points are future position; Comparison nine somes brightness also calculates this light-emitting zone area source uniformity coefficient, and this uniformity coefficient is standard uniformity coefficient.
Step S2, to determining the described LCD screen high temperature ageing test after brightness and uniformity coefficient, to simulate the state of LCD screen after Long-Time Service.Be specially, first, provide high-low temperature chamber, be positioned in high-low temperature chamber by smooth for described LCD screen, temperature be adjusted between 50 DEG C to 70 DEG C, the test duration is adjusted to 240 hours.
Then, described LCD screen taken out from high-low temperature chamber, under being positioned over normal temperature, time of repose is no less than 2 hours.
Step S3, carries out high/low-temperature impact test to the described LCD screen after high temperature, to accelerate the exposure of described LCD screen brightness and uniform defect.Concrete testing procedure is, first, provides a thermal shock case, described LCD screen qualified for high temperature test is loaded in described thermal shock case, regulates test condition, places 30 minutes under temperature-20 DEG C of conditions; Then inversion temperature, is adjusted to 60 DEG C and places 30 minutes by temperature.Wherein, temperature transition frequency is greater than 10 DEG C/min, and 100 circulations are carried out in this test, and temperature cycles is by low temperature, and high temperature terminates, and occurs dew condensation phenomenon mainly for avoiding the rear described LCD screen of test.
Then, described LCD screen taken out from thermal shock case, under being positioned over normal temperature, time of repose is no less than 2 hours, and by smooth for described LCD screen placement.
Step S4, checks brightness and the homogeneity of described LCD screen picture.Be specially, repeating said steps S1, detect brightness and the picture homogeneity sustainment rate of 9 gauge points identical with described nine future positions in light-emitting zone.
LCD screen briliancy method of testing of the present invention carries out brightness sustainment rate and uniformity test by simulation to the described LCD screen after high temperature ageing and thermal shock, finds the shortcoming of the briliancy poor performance that LCD screen may exist after Long-Time Service.Effectively can filter out LCD screen at defective products such as the brightness of possibility LCD screen are low after Long-Time Service, light is uneven, for product development selects high-quality LCD screen to provide foundation, ensure the quality of described LCD screen.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (9)
1. a LCD screen briliancy method of testing, is characterized in that, described method comprises:
LCD screen to be tested is provided;
Determine the step of prediction brightness under described LCD screen unused state and standard homogeneity, wherein, described LCD screen to be placed in dark place and to be energized, make the backlight module of described LCD screen luminous and keep a period of time, and measure described LCD screen light-emitting zone, in measured region, determine nine grids position, and determine future position and standard uniformity coefficient;
To the step determining the described LCD screen high temperature ageing test after brightness and uniformity coefficient;
Described LCD screen after high temperature is carried out to the step of high/low-temperature impact test;
Check the step of the relative future position of described LCD screen picture and standard uniformity coefficient sustainment rate.
2. LCD screen briliancy method of testing according to claim 1, is characterized in that, also the retention time is 30 seconds in the backlight module luminescence of LCD screen.
3. LCD screen briliancy method of testing according to claim 1, it is characterized in that, after determining to determine nine grids position in measured region, provide color analysis instrument, determine nine somes brightness of the described LCD screen in nine grids, these nine points are future position; Comparison nine somes brightness also calculates this light-emitting zone area source uniformity coefficient, and this uniformity coefficient is standard uniformity coefficient.
4. LCD screen briliancy method of testing according to claim 3, it is characterized in that, the step that described LCD screen high temperature ageing after determining brightness and uniformity coefficient is tested is comprised for providing high-low temperature chamber and regulating probe temperature and time, is positioned over smooth for described LCD screen in high-low temperature chamber.
5. LCD screen briliancy method of testing according to claim 4, is characterized in that, the temperature of described test is adjusted between 50 DEG C to 70 DEG C, and the time of test is 240 hours.
6. LCD screen briliancy method of testing according to claim 5, it is characterized in that, the step of the described LCD screen high temperature ageing test after determining brightness and uniformity coefficient is also comprised time of repose under described LCD screen being positioned over normal temperature after test is no less than 2 hours.
7. LCD screen briliancy method of testing according to claim 6, it is characterized in that, carry out high/low-temperature impact test to the described LCD screen after high temperature to comprise, one thermal shock case is provided, described LCD screen qualified for high temperature test is loaded in described thermal shock case, regulate test condition.
8. LCD screen briliancy method of testing according to claim 7, is characterized in that, described test condition is place 30 minutes under temperature-20 DEG C of conditions; Then inversion temperature, is adjusted to 60 DEG C and places 30 minutes by temperature.
9. LCD screen briliancy method of testing according to claim 8, is characterized in that, described temperature transition frequency is greater than 10 DEG C/min, and carries out 100 circulations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310613973.8A CN104678602A (en) | 2013-11-27 | 2013-11-27 | Method for testing brightness of liquid crystal screen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310613973.8A CN104678602A (en) | 2013-11-27 | 2013-11-27 | Method for testing brightness of liquid crystal screen |
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| Publication Number | Publication Date |
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| CN104678602A true CN104678602A (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310613973.8A Pending CN104678602A (en) | 2013-11-27 | 2013-11-27 | Method for testing brightness of liquid crystal screen |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107345848A (en) * | 2017-05-31 | 2017-11-14 | 捷开通讯(深圳)有限公司 | A kind of method and system for testing terminal |
| CN110879489A (en) * | 2019-11-27 | 2020-03-13 | 深圳同兴达科技股份有限公司 | Reliability test system and test method based on Internet of things |
| CN113703203A (en) * | 2021-07-30 | 2021-11-26 | 惠州市德赛西威汽车电子股份有限公司 | Automatic display uniformity testing method for LCD screen |
-
2013
- 2013-11-27 CN CN201310613973.8A patent/CN104678602A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107345848A (en) * | 2017-05-31 | 2017-11-14 | 捷开通讯(深圳)有限公司 | A kind of method and system for testing terminal |
| CN110879489A (en) * | 2019-11-27 | 2020-03-13 | 深圳同兴达科技股份有限公司 | Reliability test system and test method based on Internet of things |
| CN113703203A (en) * | 2021-07-30 | 2021-11-26 | 惠州市德赛西威汽车电子股份有限公司 | Automatic display uniformity testing method for LCD screen |
| CN113703203B (en) * | 2021-07-30 | 2023-08-22 | 惠州市德赛西威汽车电子股份有限公司 | Automatic testing method for display uniformity of LCD screen |
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Application publication date: 20150603 |