CN100510897C - Side light type backlight modular unit - Google Patents
Side light type backlight modular unit Download PDFInfo
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- CN100510897C CN100510897C CNB2006101039733A CN200610103973A CN100510897C CN 100510897 C CN100510897 C CN 100510897C CN B2006101039733 A CNB2006101039733 A CN B2006101039733A CN 200610103973 A CN200610103973 A CN 200610103973A CN 100510897 C CN100510897 C CN 100510897C
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- guide plate
- light guide
- light
- modular unit
- backlight modular
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Abstract
The invention discloses a side-light type back light module, comprising a side light supply, a light guiding board and a module frame, wherein, a light guiding board adjusting device is arranged on the light guiding board and the module frame, and a position of the light guiding board relative to the side light supply can be freely adjusted by the adjusting device. The invention adopts the light guiding board adjusting device to freely adjust the position of the light guiding board so as to change a position of a center brightness and to enhance the equality of the picture and also to improve a problem that a bright line appears in an incidence part. And in the end a displaying system which has excellent picture quality and equality is realized.
Description
Technical field
The present invention relates to a kind of backlight modular unit, particularly a kind of side light type backlight modular unit.
Background technology
As shown in Figure 1, be general liquid crystal display device side light type backlight modular unit commonly used.As shown in Figure 1, be a kind of schematic cross-section of backlight modular unit of prior art, it comprises light source 11, light guide plate 12, reflection shield 13 and reflector plate 14.Light guide plate 12 has the incident end face 123 of exit facet 121, a back side 122 and the light input usefulness of light output, is vertical plane with respect to incident beam, and is positioned at a side of light source 11.122 inside, the light guide plate back side have a plurality of rounded convex 124.The emission light of light source 11 enters light guide plate 12 inside and carries out repeatedly total reflection through being projected to incident end face 123, is penetrated by exit facet 121.When the so far a little rounded convex 124 of the folded light beam of light guide plate 12 inside projection, be scattered and be directed to exit facet 121 outputs, become the luminous source of backlight modular unit.Reflection shield 13 ambient light sources 11, so that light source 11 back side emitted light beams are through reflection shield 13 reflection, and the people who is incident upon light guide plate 12 penetrates face 123.Reflecting piece 14 is located at 122 outsides, luminous plaque 12 back sides, to reflect the light beam that penetrates from light guide plate 12 back sides 122.
In general, the light guide plate in the display system is fixed with respect to light source.When completed backlight modular unit carries out picture homogeneous degree and picture quality evaluation; if when having used the light guide plate 12 of band rounded convex 124 as shown in Figure 1 or light reflector cover 13, usually can be offset in the position that bright line or center brightness appear in light in part.For such situation,, need to reconcile the position of light guide plate in order to obtain normal picture quality.But because the light guide plate of existing display system backlight modular unit is fixed on the module framework, can't directly change the position of light guide plate, so want to change the position of light guide plate, can only redesign backlight modular unit, again make, finish the evaluation that product carry out picture homogeneous degree and picture quality once more for it then.
By as can be known aforementioned, existing backlight modular unit is more loaded down with trivial details with respect to the production program that production has the high-quality screen quality, and elapsed time consumes property.
Summary of the invention
The objective of the invention is to propose the backlight modular unit of a kind of light guide plate of free adjustment up and down position, thereby obtain the display system of preferable picture quality and picture homogeneous degree in order to overcome the defective of prior art.
To achieve these goals, the invention provides a kind of side light type backlight modular unit, comprise: sidelight source, light guide plate and module frame, module frame and light guide plate are provided with light guiding board adjusting device, by this regulating device can the free adjustment light guide plate with respect to the position in sidelight source.
Wherein, be pasted with the optics matrix on the exiting surface of described light guide plate.Described light guide plate below is provided with reflecting plate.Inside, the described light guide plate back side has a plurality of rounded convex.Described light source is coated by a reflection shield except that emission side.Described light guiding board adjusting device, the position of energy up-down adjustment light guide plate.Described light guiding board adjusting device is specially guiding and the fastening screw of using that is provided with on guiding groove that is provided with on the module frame and light guide plate.Described light guiding board adjusting device specifically also can be the slip block tongue that is provided with on slip draw-in groove that is provided with on the module frame and tabula rasa.Described light guiding board adjusting device specifically also can be the tooth bar that is provided with on gear that is provided with on the module frame and light guide plate.
The present invention is with respect to prior art, owing to increased the regulating device of light guide plate, can be after backlight modular unit completes, position by light guiding board adjusting device free adjustment light guide plate, thereby light guide plate position in the time of can finding the picture quality of the display system the best that is attached thereto and picture homogeneous degree, realization is without the redesign backlight modular unit structure and the process of not making again, just can directly produce the display systems such as notebook LCD, tabletop display of best picture quality and picture homogeneous degree.
Below in conjunction with the drawings and specific embodiments the present invention is further illustrated in more detail.
Description of drawings
Fig. 1 is the side light type backlight modular unit synoptic diagram of prior art;
Fig. 2 is a side light type backlight modular unit synoptic diagram of the present invention;
Fig. 3 is specific embodiment one synoptic diagram of light guiding board adjusting device of the present invention;
Fig. 4 is specific embodiment two synoptic diagram of light guiding board adjusting device of the present invention;
Fig. 5 is specific embodiment three synoptic diagram of light guiding board adjusting device of the present invention;
Fig. 6 a does not regulate the position outboard profile before of light guide plate for the present invention;
Fig. 6 b moves down the outboard profile behind the position of light guide plate for the present invention;
Fig. 7 for a change before the position of light guide plate with the bright line that occurs at light in part that records afterwards.
Mark among the figure:
1, light guiding board adjusting device; 2, prismatic lens; 3, scattering sheet; 4, module frame; 5, guiding groove; 6, screw; 7, slip draw-in groove; 8, slip block tongue; 9, tooth bar; 10, gear; 11, light source; 12, light guide plate; 121, exit facet; 122, the back side; 123, incident end face; 124, rounded convex; 13, reflection shield; 14, reflector plate.
Embodiment
As shown in Figure 2, be specific embodiment of side light type backlight modular unit of the present invention.This backlight modular unit comprises light source 11, light guide plate 12, reflection shield 13 and reflector plate 14; Light guide plate 12 has the incident end face 123 of exit facet 121, a back side 122 and the light input usefulness of light output, and it is positioned at a side of light source 11; 122 inside, the light guide plate back side have a plurality of rounded convex 124; Reflection shield 13 ambient light sources 11; Reflecting piece 14 is located at 122 outsides, light guide plate 12 back sides; Be pasted with prismatic lens 2 and scattering sheet 3 on the exit facet 121 of light guide plate.Above-mentioned ingredient and backlight modular unit of the prior art all do not have much difference, and can carry out accommodation, can exchange as the position of prismatic lens 2 and scattering sheet 3.Present embodiment (or the present invention) difference prior art is characterised in that, comprise that also a light guiding board adjusting device 1 is (not shown at Fig. 2, concrete structure is with reference to the light guiding board adjusting device synoptic diagram), this device is arranged on module frame 4 and the light guide plate 12, by this regulating device, adjusting light guide plate 12 that can be up and down is with respect to the position of light source 11.Below will be in conjunction with specific embodiments light guiding board adjusting device being elaborated.
Light guiding board adjusting device embodiment one:
As shown in Figure 3, light guiding board adjusting device 1 be specially module frame 4 bilaterals or one-sided on set guiding groove 5, produce one or more screws in light guide plate 12 near guiding groove 5 places, be fixed on the module frame 4 by screw 6 and the guiding groove 5 that guide effect is arranged then.Only need unclamp screw 6 when regulating light guide plate 12 positions, it is slided in guiding groove 5, relatively move, when light guide plate 12 moves to suitable position, tighten screw 6 and get final product thereby drive light guide plate 12.
Light guiding board adjusting device embodiment two:
As shown in Figure 4, light guiding board adjusting device 1 be specially module frame 4 bilaterals or one-sided on set slip draw-in groove 7, on light guide plate 12, set slip block tongue 8.Owing on the slip draw-in groove 7 many grooves are arranged, many projections are arranged on the slip block tongue 8, when regulating the position of light guide plate 12 like this, only need mobile slip block tongue 8 in slip draw-in groove 7, to move, stop to get final product to correct position, groove on the slip draw-in groove 7 cooperates naturally with the projection of slip block tongue 8, realizes fastening function.
Light guiding board adjusting device embodiment three:
As shown in Figure 5, light guiding board adjusting device 1 be specially module frame 4 bilaterals or one-sided on set guiding groove 5, on light guide plate 12, set tooth bar 9, the gear 10 that matches with tooth bar 9 is fixed on the module frame 4 (not to be expressed among the figure).Only need rolling bearing 10 when regulating the position of light guide plate 12, gear 10 drives the tooth bar 9 that cooperates with it and the light guide plate 12 that is attached thereto moves, thereby realizes the position adjustment function of light guide plate 12.In order to prevent to slide again after light guide plate 12 from moving to suitable position, can consider to increase corresponding trip bolt.
Above-mentioned three light guiding board adjusting device embodiment are the reference mode that provides only, and the governor motion of light guide plate can carry out various accommodations, as set chute on module frame, sets slide block on light guide plate; On light guide plate, set chute conversely, set the alternative functions that slide block etc. all can be realized this regulating device at module frame.In addition, only provided the governor motion of single direction in this specific embodiment, can be changed into multidirectional up and down governor motion by accommodation.
Below in conjunction with concrete test figure the present invention is further specified.
In the notebook LCD panel, get 5 points at central part, except getting 8 points in other places of central part,, under different condition, use BM-7 (color luminance meter) testing to uniformity coefficient and center brightness then to these 13 points.
Table one is for recording experimental data before the position of not regulating light guide plate.Wherein, center brightness is 2672.0nit (nit); The luminance uniformity of 5 sampling spots in centre (numeral tilts in the following table) is 84.1%, and the luminance uniformity of 13 (5 sampling spots in the middle of 8 number underlines add in the following table) sampling spots of whole front panel is 55.6%.
Table one:
The position of light guide plate after the direction near light source moves 1mm, is measured again.Table two is the experimental data that the position of light guide plate records after the direction near light source moves 1mm.Wherein, center brightness is 2549.0nit (nit), the luminance uniformity of 5 sampling spots in centre (numeral tilts in the following table) is 84.5%, and the luminance uniformity of 13 sampling spots of whole front panel (5 sampling spots in the middle of 8 number underlines add in the following table) is 57.6%.
Table two:
The position of light guide plate after the direction away from light source moves 1mm, is measured again.Table three is the experimental data that the position of light guide plate records after the direction away from light source moves 1mm.Wherein, center brightness is 2877.0nit (nit), the luminance uniformity of 5 sampling spots in centre (numeral tilts in the following table) is 88.3%, and the luminance uniformity of 13 sampling spots of whole front panel (5 sampling spots in the middle of 8 number underlines add in the following table) is 60.4%.
Table three:
By above-mentioned three groups of test figures as can be seen, along with the variation of light guide plate position, the demonstration uniformity coefficient and the center brightness of display panel also change thereupon, by adjusting the position of light guide plate, just can determine to realize the position of the light guide plate of best quality.
Fig. 6 a is the position light source luminescent outboard profile before that the present invention does not regulate light guide plate, and Fig. 6 b is with light guide plate of the present invention light source light emission side figure when light source direction moves 1mm.Fig. 7 adopts before the adjusting light guide plate that HT12X13 model (light guide plate that this model adopts is the prismatic light guide plate, light guide plate backlight band reflex housing) records and the bright line that occurs at light in part afterwards.Wherein, curve a presentation graphs 6a does not regulate the bright line of the light in part that records before the position of light guide plate, and curve b presentation graphs 6b is the bright line of the light in part that do not record of the outboard profile during (light source direction) mobile light guide plate 1mm downwards.By two curves as can be seen, when not regulating light guide plate, the brightness of incident section is apparently higher than other positions, and behind the position of adjusting light guide plate, the brightness curve variation obviously eases up, and the brightness of incident section is compared with other positions, and difference is not obvious.
By above-mentioned experiment and experimental data as can be known, regulate the position of light guide plate, can change the position of center brightness, also can improve picture homogeneous degree, the problem that bright line appears in the incident section can also be improved, the purpose of best picture quality and picture homogeneous degree display system can be realized producing at last.
It should be noted that at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art should can use different materials and equipment to realize it as required, promptly can make amendment or be equal to replacement, and not break away from the spirit and scope of technical solution of the present invention technical scheme of the present invention.
Claims (9)
1, a kind of side light type backlight modular unit comprises: sidelight source, light guide plate and module frame is characterized in that: described module frame and light guide plate are provided with light guiding board adjusting device, by the position of this regulating device free adjustment light guide plate with respect to the sidelight source.
2, backlight modular unit according to claim 1 is characterized in that: be pasted with the optics matrix on the exiting surface of described light guide plate.
3, backlight modular unit according to claim 1 is characterized in that: described light guide plate below is provided with reflecting plate.
4, backlight modular unit according to claim 1 is characterized in that: inside, the described light guide plate back side has a plurality of rounded convex.
5, backlight modular unit according to claim 1 is characterized in that: described sidelight source places a reflection shield.
6, according to the arbitrary described backlight modular unit of claim 1-5, it is characterized in that: described light guiding board adjusting device, the position of energy up-down adjustment light guide plate.
7, according to the arbitrary described backlight modular unit of claim 1-5, it is characterized in that: described light guiding board adjusting device is specially guiding and the fastening screw of using that is provided with on guiding groove that is provided with on the module frame and light guide plate.
8, according to the arbitrary described backlight modular unit of claim 1-5, it is characterized in that: described light guiding board adjusting device is specially the slip block tongue that is provided with on slip draw-in groove that is provided with on the module frame and light guide plate.
9, according to the arbitrary described backlight modular unit of claim 1-5, it is characterized in that: described light guiding board adjusting device is specially the tooth bar that is provided with on gear that is provided with on the module frame and light guide plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101039733A CN100510897C (en) | 2006-07-28 | 2006-07-28 | Side light type backlight modular unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101039733A CN100510897C (en) | 2006-07-28 | 2006-07-28 | Side light type backlight modular unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101114077A CN101114077A (en) | 2008-01-30 |
| CN100510897C true CN100510897C (en) | 2009-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006101039733A Active CN100510897C (en) | 2006-07-28 | 2006-07-28 | Side light type backlight modular unit |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661556A (en) * | 2012-05-30 | 2012-09-12 | 深圳市华星光电技术有限公司 | Backlight module |
| CN102980148B (en) | 2012-12-04 | 2015-03-04 | 京东方科技集团股份有限公司 | Frame of backlight module, backlight module and display device |
| CN103453402B (en) * | 2013-08-28 | 2016-09-14 | 昆山龙腾光电有限公司 | Backlight module |
| CN106019703B (en) * | 2016-06-12 | 2019-08-13 | 京东方科技集团股份有限公司 | A kind of display and its control method |
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| CN101114077A (en) | 2008-01-30 |
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