CN104848094A - Method for improving brightness uniformity of backlight module - Google Patents
Method for improving brightness uniformity of backlight module Download PDFInfo
- Publication number
- CN104848094A CN104848094A CN201510276987.4A CN201510276987A CN104848094A CN 104848094 A CN104848094 A CN 104848094A CN 201510276987 A CN201510276987 A CN 201510276987A CN 104848094 A CN104848094 A CN 104848094A
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- guide plate
- light guide
- backlight module
- brightness value
- isolated area
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
- F21V13/02—Combinations of only two kinds of elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a method for improving brightness uniformity of a backlight module. A light guide plate is divided by an air partition wall into a plurality of independent areas; a standard light source emitting light evenly is used to detect light brightness of each independent area of the light guide plate, and the brightness of each area of an LED backlight source to be assembled is adjusted; the standard back light source is replaced, thus the backlight module emits light evenly; the production process is simple, brightness uniformity of the backlight module is achieved at low cost; by adjusting spacing of local LEDs in the LED backlight source, the defects of the light guide plate made by the existing process are overcome, and good brightness uniformity of the backlight module is achieved.
Description
Technical field
The present invention relates to lcd technology, particularly relate to a kind of method promoting backlight module brightness uniformity.
Background technology
Liquid crystal indicator (Liquid Crystal Display, LCD) have that fuselage is thin, power saving, the many merits such as radiationless, be widely used, as: mobile phone, PDA(Personal Digital Assistant), digital camera, computer screen or notebook computer screen etc.
Liquid crystal indicator major part on existing market is backlight liquid crystal indicator, and it comprises liquid crystal panel and backlight module (backlight module).The operation principle of liquid crystal panel places liquid crystal molecule in the middle of the glass substrate that two panels is parallel, changes direction, the light refraction of backlight module is out produced picture by whether being energized to control liquid crystal molecule to glass substrate.Because liquid crystal panel itself is not luminous, need the light source provided by backlight module to carry out normal show image, therefore, backlight module becomes one of key component determining display quality of liquid crystal display device.The show uniformity of brightness uniformity to liquid crystal display module of backlight module has a great impact, and therefore, promotes backlight module brightness uniformity and seems extremely important.But in actual applications, because existing technique limits, the lattice point structure on light guide plate is difficult to really accomplish to be uniformly distributed; And the diameter of various site and the degree of depth are difficult to accomplish unification, and these all can cause the difference of backlight module brightness.
Summary of the invention
The object of this invention is to provide a kind of method promoting backlight module brightness uniformity, to guarantee the uniformity of backlight module brightness.
Technical scheme of the present invention is as follows: the invention provides a kind of method promoting backlight module brightness uniformity, comprise the following steps:
Step 101, provide backboard, normal backlight source, and this normal backlight source is installed in described backboard, described normal backlight source uniformly light-emitting;
Step 102, provide light guide plate to be assembled, described light guide plate is divided into several isolated area, is installed in described backboard by described light guide plate, lights normal backlight source, measures the brightness value of each isolated area;
Step 103, several isolated areas of corresponding for LED backlight to be assembled light guide plate are divided into several region, adjust the luminosity of LED backlight regional according to the brightness value of the several isolated area of light guide plate;
Step 104, the LED backlight adjusting regional luminosity is replaced described normal backlight source;
Step 105, provide optical diaphragm group, and be assembled on light guide plate, to form backlight module.
Described step 101 also comprises provides reflector plate, and is installed in described backboard by described reflector plate; Described light guide plate is installed on described reflector plate.
In described step 102, the brightness value of each isolated area of light guide plate is that 6 points got in each isolated area are measured, and obtains 6 brightness values, gets the brightness value of mean value as each isolated area of these 6 brightness values.
Brightness measuring instrument is adopted to detect the luminosity of each isolated area of light guide plate.
The luminosity adjusting LED backlight regional according to the brightness value of the several isolated area of light guide plate in described step 103 is: the spacing between the LED lamp bead expanding the region in LED backlight corresponding to the high isolated area of described light guide plate luminance value, the spacing between the LED lamp bead reducing the region in LED backlight corresponding to the low isolated area of described light guide plate luminance value.
Described step 104 also comprises: the brightness value measuring the various isolated area of light guide plate, if the luminance difference between minimum brightness value and highest brightness value is within standard error scope, then goes to step 105; If the luminance difference between minimum brightness value and highest brightness value is not within standard error scope, then repeat the luminosity adjusting LED backlight regional, make luminance difference between minimum brightness value and highest brightness value within standard error scope, then go to step 105.
The standard error scope of the luminance difference between described minimum brightness value and highest brightness value is 5% of minimum brightness value.
Described optical diaphragm group comprises the diffusion sheet set gradually from bottom to up, lower brightening piece and upper brightening piece.
Described light guide plate is provided with several air insulated wall, and this light guide plate is divided into several isolated area by described several air insulated wall.
Described air insulated wall is Open architecture or enclosed construction, and described air insulated wall is cuboid, cylindrical or triangle body.
Adopt such scheme, the method of lifting backlight module brightness uniformity of the present invention, by air insulated wall, light guide plate is divided into some isolated areas, the luminosity of each isolated area of light guide plate is detected again with luminous uniform normal backlight source, thus adjust the brightness of LED backlight regional to be assembled, and utilize it to replace normal backlight source, thus make backlight module evenly luminous, production technology is simple, realizes this effect of backlight module brightness uniformity with low cost; Solve existing technique by the spacing adjusted between LED backlight LED lamp bead locally and bring this problem of defect to light guide plate, make backlight module brightness uniformity good.
Accompanying drawing explanation
Fig. 1 is the flow chart that the present invention promotes the method for backlight module brightness uniformity.
Fig. 2 is the structural representation of backlight module in the present invention.
Fig. 3 is the structural representation of one embodiment when air insulated wall is Open architecture in the present invention.
Fig. 4 is the structural representation of one embodiment when air insulated wall is enclosed construction in the present invention.
Fig. 5 is the structural representation of LED backlight one embodiment to be assembled in the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Refer to Fig. 1 and Fig. 2, the invention provides a kind of method promoting backlight module brightness uniformity, by air insulated wall 12(12 ') light guide plate 10 is divided into some isolated area 14(14 '), detect each isolated area of light guide plate 10 14(14 ' with luminous uniform normal backlight source again) brightness, thus adjust the luminosity of LED backlight 4 regional to be assembled, and utilize it to replace normal backlight source, thus make backlight module evenly luminous; The method specifically comprises the following steps:
Step 101, provide backboard 2, normal backlight source (not shown) and reflector plate 6, and this normal backlight source and reflector plate 6 are installed in described backboard 2, described normal backlight source uniformly light-emitting.
The bottom of backboard 2 is located at by described reflector plate, for being reflected back by the light in directive radiogram direction, improves light source utilization rate.Described normal backlight source is linear LED lamp bar, and through debugging, it is towards light guide plate uniformly light-emitting.This standard sources is located on the sidewall of backboard 2.
Step 102, provide light guide plate 10 to be assembled, described light guide plate 10 is divided into several isolated area 14(14 '), described light guide plate 10 is installed in described backboard 2, lights normal backlight source, measure each isolated area 14(14 ') brightness value.
Described light guide plate 10 is provided with several air insulated wall 12(12 '), described several air insulated wall 12(12 ') this light guide plate 10 is divided into several isolated area 14(14 '), utilize total reflection principle control inject each isolated area 14(14 ') light because cannot air insulated wall 12(12 ' be passed), thus be confined to this isolated area 14(14 ') in, thus it is adjustable to realize light guide plate 10 local luminance.Refer to Fig. 3 and Fig. 4, described air insulated wall 12(12 ') in Open architecture, upwards extended from light guide plate 10 bottom surface; Also can be enclosed construction, be located at light guide plate 10 inner.Described air insulated wall 12(12 ') shape also can select according to practical application, but the shape selected all can meet the requirement of full emission principle, in the present embodiment, can be cuboid, cylindrical or triangle body, when for triangle body shape, be specially isoceles triangle shape.
In this step, adopt brightness measuring instrument to detect each isolated area of light guide plate 10 14(14 ') luminosity.Each isolated area of light guide plate 10 14(14 ') brightness value for getting each isolated area 14(14 ') in 6 points measure, obtain 6 brightness values, get the mean value of these 6 brightness values as each isolated area 14(14 ') brightness value, accuracy is high.The position of these 6 points is evenly distributed in this isolated area 14(14 ') in.
Step 103, be several region 42(44 by several Region dividing of the corresponding light guide plate of LED backlight 4 10 to be assembled), according to the several isolated area 14(14 ' of light guide plate 10) brightness value adjust LED backlight 4 regional 42(44) luminosity.
Described LED backlight 4 to be assembled is also linear LED lamp bar.
Refer to Fig. 5, in this step, according to light guide plate 10 several isolated area 14(14 ') brightness value adjust LED backlight 4 regional 42(44) luminosity specific practice be: the spacing d2 between the LED lamp bead expanding the region 44 in the LED backlight 4 of high isolated area 14 correspondence of described light guide plate 10 brightness value, spacing d1 between the LED lamp bead reducing the region 42 in LED backlight 4 corresponding to the low isolated area 14 ' of described light guide plate 10 brightness value, thus reduce the brightness of light guide plate 10 brightness height isolated area 14, improve the brightness of the low isolated area 14 ' of light guide plate 10 brightness, the brightness of each isolated area 14 of light guide plate 10 is reached unanimity, uniformity is good.
Step 104, will regional 42(44 be adjusted) LED backlight 4 of luminosity replaces described normal backlight source.
In this step, after installing LED backlight 4 to be assembled, selectively again measure the various isolated area 14(14 ' of light guide plate 10) brightness value, if the luminance difference between minimum brightness value and highest brightness value is within standard error scope, then go to step 105; If the luminance difference between minimum brightness value and highest brightness value is not within standard error scope, then repeat LED backlight 4 regional 42(44) luminosity, make luminance difference between minimum brightness value and highest brightness value within standard error scope, then go to step 105.
The standard error scope of the luminance difference between described minimum brightness value and highest brightness value, according to actual set, in the present embodiment, is specially 5% of minimum brightness value.
Step 105, provide optical diaphragm group 8, and be assembled on light guide plate 10, to form backlight module.
Described optical diaphragm group 8 comprises the diffusion sheet set gradually from bottom to up, lower brightening piece and upper brightening piece (sign).
In sum, the invention provides a kind of method promoting backlight module brightness uniformity, by air insulated wall, light guide plate is divided into some isolated areas, the luminosity of each isolated area of light guide plate is detected again with luminous uniform normal backlight source, thus adjust the brightness of LED backlight regional to be assembled, and utilize it to replace normal backlight source, thus make backlight module evenly luminous, production technology is simple, realizes this effect of backlight module brightness uniformity with low cost; Solve existing technique by the spacing adjusted between LED backlight LED lamp bead locally and bring this problem of defect to light guide plate, make backlight module brightness uniformity good.
These are only preferred embodiment of the present invention, be not limited to the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. promote a method for backlight module brightness uniformity, it is characterized in that, comprise the following steps:
Step 101, provide backboard, normal backlight source, and this normal backlight source is installed in described backboard, described normal backlight source uniformly light-emitting;
Step 102, provide light guide plate to be assembled, described light guide plate is divided into several isolated area, is installed in described backboard by described light guide plate, lights normal backlight source, measures the brightness value of each isolated area;
Step 103, several isolated areas of corresponding for LED backlight to be assembled light guide plate are divided into several region, adjust the luminosity of LED backlight regional according to the brightness value of the several isolated area of light guide plate;
Step 104, the LED backlight adjusting regional luminosity is replaced described normal backlight source;
Step 105, provide optical diaphragm group, and be assembled on light guide plate, to form backlight module.
2. the method for lifting backlight module brightness uniformity according to claim 1, it is characterized in that, described step 101 also comprises provides reflector plate, and is installed in described backboard by described reflector plate; Described light guide plate is installed on described reflector plate.
3. the method for lifting backlight module brightness uniformity according to claim 1, it is characterized in that, in described step 102, the brightness value of each isolated area of light guide plate is that 6 points got in each isolated area are measured, obtain 6 brightness values, get the brightness value of mean value as each isolated area of these 6 brightness values.
4. the method for lifting backlight module brightness uniformity according to claim 3, is characterized in that, adopts brightness measuring instrument to detect the luminosity of each isolated area of light guide plate.
5. the method for lifting backlight module brightness uniformity according to claim 1, it is characterized in that, the luminosity adjusting LED backlight regional according to the brightness value of the several isolated area of light guide plate in described step 103 is: the spacing between the LED lamp bead expanding the region in LED backlight corresponding to the high isolated area of described light guide plate luminance value, the spacing between the LED lamp bead reducing the region in LED backlight corresponding to the low isolated area of described light guide plate luminance value.
6. the method for lifting backlight module brightness uniformity according to claim 1, it is characterized in that, described step 104 also comprises: the brightness value measuring the various isolated area of light guide plate, if the luminance difference between minimum brightness value and highest brightness value within standard error scope, then goes to step 105; If the luminance difference between minimum brightness value and highest brightness value is not within standard error scope, then repeat the luminosity adjusting LED backlight regional, make luminance difference between minimum brightness value and highest brightness value within standard error scope, then go to step 105.
7. the method for lifting backlight module brightness uniformity according to claim 6, is characterized in that, the standard error scope of the luminance difference between described minimum brightness value and highest brightness value is 5% of minimum brightness value.
8. the method for lifting backlight module brightness uniformity according to claim 1, is characterized in that, described optical diaphragm group comprises the diffusion sheet set gradually from bottom to up, lower brightening piece and upper brightening piece.
9. the method for lifting backlight module brightness uniformity according to claim 1, is characterized in that, described light guide plate is provided with several air insulated wall, and this light guide plate is divided into several isolated area by described several air insulated wall.
10. the method for lifting backlight module brightness uniformity according to claim 9, is characterized in that, described air insulated wall is Open architecture or enclosed construction, and described air insulated wall is cuboid, cylindrical or triangle body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510276987.4A CN104848094A (en) | 2015-05-27 | 2015-05-27 | Method for improving brightness uniformity of backlight module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510276987.4A CN104848094A (en) | 2015-05-27 | 2015-05-27 | Method for improving brightness uniformity of backlight module |
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| CN104848094A true CN104848094A (en) | 2015-08-19 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107562398A (en) * | 2017-09-12 | 2018-01-09 | 京东方科技集团股份有限公司 | Uniformity adjustment method and device, equipment and computer-readable recording medium |
| CN108428436A (en) * | 2018-05-08 | 2018-08-21 | 京东方科技集团股份有限公司 | Luminance compensation method, luminance compensating mechanism, display device and storage medium |
| CN110111732A (en) * | 2019-05-13 | 2019-08-09 | 云谷（固安）科技有限公司 | The brightness adjusting method of mosaic screen, the display screen of mosaic screen and mosaic screen |
| WO2023143036A1 (en) * | 2022-01-30 | 2023-08-03 | 京东方科技集团股份有限公司 | Backlight brightness adjustment method, device, and system, and storage medium |
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| CN101839423A (en) * | 2009-11-02 | 2010-09-22 | 西安交通大学 | Method for improving brightness uniformity of LED backlight |
| CN102102824A (en) * | 2009-12-18 | 2011-06-22 | Tcl集团股份有限公司 | LED (light emitting diode) backlight module, LCD (liquid crystal display) display panel and liquid crystal display television |
| CN102692669A (en) * | 2012-06-12 | 2012-09-26 | 深圳市华星光电技术有限公司 | Light guide plate and lateral type backlight module applying same |
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Patent Citations (3)
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| CN101839423A (en) * | 2009-11-02 | 2010-09-22 | 西安交通大学 | Method for improving brightness uniformity of LED backlight |
| CN102102824A (en) * | 2009-12-18 | 2011-06-22 | Tcl集团股份有限公司 | LED (light emitting diode) backlight module, LCD (liquid crystal display) display panel and liquid crystal display television |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107562398A (en) * | 2017-09-12 | 2018-01-09 | 京东方科技集团股份有限公司 | Uniformity adjustment method and device, equipment and computer-readable recording medium |
| US10621907B2 (en) | 2017-09-12 | 2020-04-14 | Boe Technology Group Co., Ltd. | Method and device for adjusting uniformity, apparatus, and computer readable storage medium |
| CN107562398B (en) * | 2017-09-12 | 2020-12-01 | 京东方科技集团股份有限公司 | Uniformity debugging method and device, uniformity debugging equipment and computer readable storage medium |
| CN108428436A (en) * | 2018-05-08 | 2018-08-21 | 京东方科技集团股份有限公司 | Luminance compensation method, luminance compensating mechanism, display device and storage medium |
| CN108428436B (en) * | 2018-05-08 | 2019-12-10 | 京东方科技集团股份有限公司 | luminance compensation method, luminance compensation device, display device, and storage medium |
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| CN110111732A (en) * | 2019-05-13 | 2019-08-09 | 云谷（固安）科技有限公司 | The brightness adjusting method of mosaic screen, the display screen of mosaic screen and mosaic screen |
| CN110111732B (en) * | 2019-05-13 | 2020-11-06 | 云谷（固安）科技有限公司 | Brightness adjusting method of spliced screen, display sub-screen of spliced screen and spliced screen |
| WO2023143036A1 (en) * | 2022-01-30 | 2023-08-03 | 京东方科技集团股份有限公司 | Backlight brightness adjustment method, device, and system, and storage medium |
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Application publication date: 20150819 |
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