CN102495496A - Screening device for screening non-uniformity of backlight source and testing method of screening device - Google Patents
Screening device for screening non-uniformity of backlight source and testing method of screening device Download PDFInfo
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- CN102495496A CN102495496A CN2011103575238A CN201110357523A CN102495496A CN 102495496 A CN102495496 A CN 102495496A CN 2011103575238 A CN2011103575238 A CN 2011103575238A CN 201110357523 A CN201110357523 A CN 201110357523A CN 102495496 A CN102495496 A CN 102495496A
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- backlight
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Abstract
The invention discloses a screening device for screening the non-uniformity of a backlight source and a testing method of the screening device. The screening device comprises a liquid crystal screen (1), a structural part (2) and a diffusion plate (3), wherein the structural part (2) is provided with a screen framework for mounting the liquid crystal screen (1) and a plate framework for mounting the diffusion plate (3); the section of an inner cavity of the structural part (2) is rectangular and a backlight framework (6) is mounted in the inner cavity of the structural part (2); a backlight source (5) is fixedly mounted on the backlight framework (6); one side of the backlight framework (6), which is provided with the backlight source (5), is placed towards the diffusion plate (3); a circuit board (8) with a debugging wire is mounted on the backlight source (5); and the diffusion plate (3) is mounted between the liquid crystal screen (1) and the backlight source (5). The screening device provided by the invention is used for screening the non-uniformity of the backlight source before the backlight source is mounted on a liquid crystal module, thereby assuring the non-uniformity of the liquid crystal module through assuring the non-uniformity of the backlight source which is mounted in the liquid crystal module.
Description
Technical field
The present invention relates to a kind of screening plant and method of testing thereof that is used to screen the backlight unevenness.
Background technology
LCD MODULE is the critical component of airborne information display system, and airborne information display system is aircraft " eyes ", and all flights of aircraft and guidance operation can be accomplished on airborne display system; LCD MODULE is widely used on naval, ground force and the aviation industry simultaneously, and the quality of LCD MODULE quality directly influences the judgement of operator to environment, and backlight is the most crucial parts of LCD MODULE.Backlight mainly is made up of the LED lamp at present, and in order to improve the colour gamut of LCD MODULE, great majority adopt the white lamp of LED to add LED color lamp formation; Since the contradiction on LED lamp beam split at present and the stock utilization, the indivisible too refinement of beam split, and the backlight that can cause part to weld the LED lamp like this exists uneven situation generation under low-light level; This inhomogeneous be not to show inhomogeneous in the brightness; But visual inhomogeneous, weigh and at present can't technical indicator get on, can only observe through vision; Therefore, had a strong impact on the display quality of LCD MODULE.
Summary of the invention
Technical matters to be solved by this invention is to the problem that exists in the prior art a kind of screening plant and method of testing thereof that is used to screen the backlight unevenness to be provided; Its objective is the homogeneity that guarantees to install to backlight in the LCD MODULE; Thereby guarantee the homogeneity of LCD MODULE, improve the display quality of LCD MODULE.
Technical scheme of the present invention is the screening plant that this kind is used to screen the backlight unevenness, comprises liquid crystal display, structural member and diffusing panel, and described structural member is provided with and is used to the plate framework the panel framework of liquid crystal display being installed and being used to install diffusing panel; The intracavity section of described structural member is a rectangle, and framework backlight is installed in the inner chamber of structural member, and backlight is fixed on the framework backlight, and the one side that framework backlight has backlight is towards diffusing panel, is equipped with on the backlight to have the circuit board of debugging line; Diffusing panel is installed between liquid crystal display and the backlight.
Described structural member is divided into two parts, and a part is used for fixing liquid crystal display and diffusing panel, and this part structural member is fixed; Another part is used for fixing backlight, and this part structural member is at random, changes with the variation of model.
Described backlight is provided with plug-in unit, circuit board through its contact pin and plug-in unit matching and fixing that goes up setting on backlight.
Distance between described liquid crystal display and the diffusing panel is 1cm～3cm.
Optimum distance between described liquid crystal display and the diffusing panel is 2cm.
The method of utilizing the above-mentioned screening plant that is used to screen the backlight unevenness to test comprises:
1) end of debugging line is fixed on the circuit board, and the other end and the commissioning device of debugging line are coupled together;
2) to after the backlight energising, it is minimum that the brightness of backlight is switched to the daytime pattern, and the tester stands in the position of screening plant the place ahead apart from liquid crystal display 1m, and eyes face liquid crystal display, and the homogeneity of backlight pattern in daytime is observed;
3) daytime pattern evenly after, it is maximum that the brightness of backlight is switched to the night pattern, the tester stands in the position of screening plant the place ahead apart from liquid crystal display 1m, eyes face liquid crystal display, and the homogeneity of backlight pattern at night is observed;
4) night pattern maximum evenly after, it is minimum that the brightness of backlight is switched to the night pattern, the tester stands in the position of screening plant the place ahead apart from liquid crystal display 1m, eyes face liquid crystal display, and the homogeneity of backlight pattern at night is observed.
Described daytime, pattern was to control through the brightness of the white lamp of LED, and the inhomogeneity criterion of pattern in daytime is that daytime, whole piece or the bright especially and/or dark especially phenomenon of a panel region must not appear in the pattern minimum.
Described night, pattern was to control through the brightness of LED color lamp, and the inhomogeneity criterion of pattern at night is, night, pattern maximumly or minimum whole piece must not occur or a panel region is rubescent and/or the greening and/or the phenomenon of turning blue.
A kind of screening plant and method of testing thereof that is used to screen the backlight unevenness with said structure has the following advantages:
1. this kind screening plant of being used to screen the backlight unevenness just screened its homogeneity before backlight installs to LCD MODULE; Through guaranteeing to install to the homogeneity of backlight in the LCD MODULE; Guarantee the homogeneity of LCD MODULE, improved the display quality of LCD MODULE.
2. to be used to screen the circuit board of the screening plant of backlight unevenness be to be used for controlling back light source brightness to this kind; Can accurately control the brightness of backlight through circuit board; Have mode switch function round the clock simultaneously, thereby reach our needed back light source brightness value.
3. this kind screening plant of being used to screen the backlight unevenness only need be changed backlight and circuit board and can screen backlight; Inhomogeneous situation of reprocessing takes place after having avoided uneven backlight to install to LCD MODULE; Through round the clock mode switch, the round the clock pattern brilliance control of circuit board to backlight; Not only can screen the unevenness that also can screen the LED color lamp simultaneously to the inhomogeneous of the white lamp of LED.Thereby guarantee the homogeneity of LCD MODULE.
Description of drawings
Below in conjunction with accompanying drawing the present invention is described further:
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the fixing structural representation of liquid crystal display and diffusing panel among the present invention.
Fig. 3 is the fixing structural representation of backlight among the present invention.
In Fig. 1-3,1: liquid crystal display; 2: structural member; 3: diffusing panel; 4: the structural member rear end; 5: backlight; 6: framework backlight; 7: plug-in unit; 8: circuit board.
Embodiment
By Fig. 1 is the structural representation that the present invention is used to screen the screening plant of backlight unevenness, and Fig. 2 is the fixing structural representation of liquid crystal display and diffusing panel among the present invention, and Fig. 3 is the fixing structural representation of backlight among the present invention.Combined and can be known by structure shown in Fig. 1-3, the screening plant that this kind is used to screen the backlight unevenness comprises liquid crystal display 1, structural member 2 and diffusing panel 3, and structural member 2 is provided with and is used to the plate framework the panel framework of liquid crystal display 1 being installed and being used to install diffusing panel 3; The intracavity section of described structural member 2 is rectangles; Framework 6 backlight is installed in the inner chamber of structural member 2; Backlight 5 is fixed on the framework 6 backlight, and the one side that framework backlight 6 has backlight 5 is towards diffusing panel 3, is equipped with on the backlight 5 to have the circuit board 8 of debugging line; Backlight 5 is provided with plug-in unit 7, circuit board 8 through its contact pin and plug-in unit 7 matching and fixing that go up setting on backlight 5.Diffusing panel 3 is installed between liquid crystal display 1 and the backlight 5.
Optimum distance between liquid crystal display 1 and the diffusing panel 3 is 2cm, and both leave to such an extent that have lamp shadow to occur too closely easily, apart from too far away inhomogeneity observation are not had effect.The back of structural member 2 is 10cm to distance, and this is to consider that structural member 2 can surround entire backlight framework 6, reduces shedding of light.
Liquid crystal display 1 needs long white screen; The transmissivity of long blank screen is low; Need plus signal transmission backlight light fully, indirect requirement improves backlight illumination, and backlight 5 inhomogeneous being mainly reflected under the low-light level situation; Therefore need to select long white screen, the size of long white screen is than the long and roomy 3cm. of LCD MODULE size of our present maximum model
Diffusing panel 3 need be placed on the back of liquid crystal display 1, and the front of backlight 5 is used for reducing the lamp shadow of backlight 5; The size of diffusing panel 3 is the same with the size of liquid crystal display 1.
The inner chamber material of structural member 2 is alloy or engineering plastics, and the inner light of handling 5 generations of assurance backlight that all turns white reflexes in the structure, and structural member 2 is divided into two parts, and a part is used for fixing liquid crystal display 1 and diffusing panel 3, and this part structural member is fixed; Another part is used for fixing backlight 5, and this part structural member is at random, changes with model.
The concrete installation process that this kind is used to screen the screening plant of backlight unevenness is: at first liquid crystal display 1 and diffusing panel 3 are fixed on structural member 2; Distance between the two is 2cm; The back of structural member 2 is 10cm to distance; This is to consider that structural member 2 can surround entire backlight framework 6, reduces shedding of light.
With screw with mould the handle cross and rise backlight 5 is fixed on the framework 6 backlight; The contact pin of circuit board 8 and the plug-in unit 7 of backlight are aimed at, and circuit board 8 is fetched the debugging line after placing and finishing; One end of debugging line is fixed on the circuit board 8; The framework backlight 6 that fixes the debugging line is put in from structural member rear end 4, and the one side of backlight 5 is towards diffusing panel 3 during placement, and framework 6 backlight is close to diffusing panel 3.After all placements finish, the other end and the commissioning device of debugging line coupled together, can be to backlight 5 debugging of switching on.
The method of utilizing this kind screening plant to test comprises:
1) other end and the commissioning device that will debug line couple together;
2) to after backlight 5 energising, it is minimum that the brightness of backlight 5 is switched to the daytime pattern, and the tester stands in the position of screening plant the place ahead apart from 1 one meters of liquid crystal displays, and eyes face liquid crystal display 1, and the homogeneity of backlight pattern in 5 daytime is observed; Wherein, daytime, pattern was to control through the brightness of the white lamp of LED, and the inhomogeneity criterion of pattern in daytime is that daytime, whole piece or the bright especially and/or dark especially phenomenon of a panel region must not appear in the pattern minimum.
3) daytime pattern evenly after, it is maximum that the brightness of backlight 5 is switched to the night pattern, the tester stands in the position of screening plant the place ahead apart from 1 one meters of liquid crystal displays, eyes face liquid crystal display 1, and the homogeneity of backlight pattern at 5 night is observed;
4) night pattern maximum evenly after, it is minimum that the brightness of backlight 5 is switched to the night pattern, the tester stands in the position of screening plant the place ahead apart from 1 one meters of liquid crystal displays, eyes face liquid crystal display 1, and the homogeneity of backlight pattern at 5 night is observed.
Wherein, night, pattern was to control through the brightness of LED color lamp, and the inhomogeneity criterion of pattern at night is, night, pattern maximumly or minimum whole piece must not occur or a panel region is rubescent and/or the greening and/or the phenomenon of turning blue.
The screening plant that this kind is used to screen the backlight unevenness just screened its homogeneity before backlight installs to LCD MODULE; Even situation, the circuit board that liquid crystal display and diffusing panel are used for observing backlight is used for controlling the brightness of backlight; Through both combinations, can carry out the homogeneity screening to backlight in early days, through guaranteeing to install to the homogeneity of backlight in the LCD MODULE; Guarantee the homogeneity of LCD MODULE, improved the display quality of LCD MODULE.
Claims (8)
1. screening plant that is used to screen the backlight unevenness; It is characterized in that: described screening plant comprises liquid crystal display (1), structural member (2) and diffusing panel (3), and described structural member (2) is provided with and is used to install the panel framework of liquid crystal display (1) and the plate framework that is used to install diffusing panel (3); The intracavity section of described structural member (2) is a rectangle; Framework backlight (6) is installed in the inner chamber of structural member (2); Backlight (5) is fixed on the framework backlight (6); And framework backlight (6) has the one side of backlight (5) towards diffusing panel (3), is equipped with on the backlight (5) to have the circuit board (8) of debugging line; Diffusing panel (3) is installed between liquid crystal display (1) and the backlight (5).
2. a kind of screening plant that is used to screen the backlight unevenness according to claim 1 is characterized in that: described structural member (2) is divided into two parts, and a part is used for fixing liquid crystal display (1) and diffusing panel (3), and this part structural member is fixed; Another part is used for fixing backlight (5), and this part structural member is at random, changes with the variation of model.
3. a kind of screening plant that is used to screen the backlight unevenness according to claim 2 is characterized in that: described backlight (5) is provided with plug-in unit (7), circuit board (8) through its contact pin and plug-in unit (7) matching and fixing that goes up setting on backlight (5).
4. according to the described a kind of screening plant that is used to screen the backlight unevenness of each claim of claim 1-3, it is characterized in that: the distance between described liquid crystal display (1) and the diffusing panel (3) is 1cm～3cm.
5. a kind of screening plant that is used to screen the backlight unevenness according to claim 4 is characterized in that: the optimum distance between described liquid crystal display (1) and the diffusing panel (3) is 2cm.
6. the method for utilizing the described screening plant that is used to screen the backlight unevenness of each claim of claim 1-5 to test is characterized in that: described screening technique comprises,
1) end of debugging line is fixed on the circuit board (8), and the other end and the commissioning device of debugging line are coupled together;
2) to after backlight (5) energising, it is minimum that the brightness of backlight (5) is switched to the daytime pattern, and the tester stands in the position of screening plant the place ahead apart from liquid crystal display 1m, and eyes face liquid crystal display (1), and the homogeneity of backlight (5) pattern in daytime is observed;
3) daytime pattern evenly after, it is maximum that the brightness of backlight (5) is switched to the night pattern, the tester stands in the position of screening plant the place ahead apart from liquid crystal display 1m, eyes face liquid crystal display (1), and the homogeneity of backlight (5) pattern at night is observed;
4) night pattern maximum evenly after, it is minimum that the brightness of backlight (5) is switched to the night pattern, the tester stands in the position of screening plant the place ahead apart from liquid crystal display 1m, eyes face liquid crystal display (1), and the homogeneity of backlight (5) pattern at night is observed.
7. method of testing according to claim 6; It is characterized in that: described daytime, pattern was to control through the brightness of the white lamp of LED; The inhomogeneity criterion of pattern in daytime is that daytime, whole piece or the bright especially and/or dark especially phenomenon of a panel region must not appear in the pattern minimum.
8. according to claim 6 or 7 described method of testings; It is characterized in that: described night, pattern was to control through the brightness of LED color lamp; The inhomogeneity criterion of pattern at night is, night, pattern maximumly or minimum whole piece must not occur or a panel region is rubescent and/or the greening and/or the phenomenon of turning blue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110357523.8A CN102495496B (en) | 2011-11-11 | 2011-11-11 | Screening device for screening non-uniformity of backlight source and testing method of screening device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110357523.8A CN102495496B (en) | 2011-11-11 | 2011-11-11 | Screening device for screening non-uniformity of backlight source and testing method of screening device |
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| Publication Number | Publication Date |
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| CN102495496A true CN102495496A (en) | 2012-06-13 |
| CN102495496B CN102495496B (en) | 2014-05-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103698918A (en) * | 2013-12-30 | 2014-04-02 | 京东方科技集团股份有限公司 | Straight-down-type backlight module testing device |
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| CN202362555U (en) * | 2011-11-11 | 2012-08-01 | 中航华东光电有限公司 | Device for screening nonuniformity of backlight |
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Patent Citations (5)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103698918A (en) * | 2013-12-30 | 2014-04-02 | 京东方科技集团股份有限公司 | Straight-down-type backlight module testing device |
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| Publication number | Publication date |
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| CN102495496B (en) | 2014-05-07 |
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