CN201107519Y - Back light module unit with grid point structure - Google Patents
Back light module unit with grid point structure Download PDFInfo
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- CN201107519Y CN201107519Y CNU2007201705503U CN200720170550U CN201107519Y CN 201107519 Y CN201107519 Y CN 201107519Y CN U2007201705503 U CNU2007201705503 U CN U2007201705503U CN 200720170550 U CN200720170550 U CN 200720170550U CN 201107519 Y CN201107519 Y CN 201107519Y
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Abstract
The utility model provides a backlight module with a dot structure. In order to improve the light extracting uniformity of a light guiding plate and the rate of beams to be guided out from the light guiding plate and increase the display brightness of a whole LCD, the backlight module includes a light source and the light guiding plate. The back surface of the light guiding plate is provided with hemisphere or spherical crown-shaped bumps that are arranged in dot lattice. The bumps are provided with completely same shapes and sizes. The dot lattice consisting of the bumps divides the light guiding plate into a normal illumination area and an abnormal illumination area containing a blind illumination area. The normal illumination area is divided into a plurality of subareas. The closer to the light source of the subarea, the larger the distances between lines and rows of the bumps are; the further to the light source of the subarea, the smaller the distances between lines and rows of the bumps are; in the abnormal illumination area, the distributions of the bumps are relative to the brightness of the area; in the area near a brighter light source, the distances between lines and rows of the bumps are relatively larger; in the blind illumination area or a darker area, the distances between lines and rows of the bumps are smaller.
Description
Technical field
The utility model relates to a kind of lattice point structure of module light guide plate backlight, relates in particular to a kind of lattice point structure that is used for small-medium size module light guide plate backlight.
Background technology
Existing small-medium size module backlight mostly is the light guide plate side incident, because the type of light source and light guide plate size is different, how to obtain to go out light effect and improve brightness more uniformly, and be a very important technical matters.In order to make pointolite or line source convert area source to, the lattice point structure at the light guide plate back side hemispherical bump design of giving prominence to that adopt in the existing small-medium size module backlight more, the bottom surface radius of circle of a plurality of outstanding hemispherical salient points is inequality, radius near the light source place is less, radius away from the light source place is bigger, and the variation of its radius increases progressively according to certain rules.But the area effective backlight that is used for liquid crystal panel owing to light guide plate is limited, the number of then pressing the site of above-mentioned rule design will be restricted, thereby reduced light from the probability that light guide plate derives, can't obtain higher brightness, also reduced light-emitting uniformity simultaneously.
As shown in Figure 1, described lattice point structure is divided into 4 zones that are parallel to each other by the distance with light source, the horizontal distance of center circle between all adjacent hemispherical salient point bottom surface circles is 0.02 millimeter, and the adjacent lines spacing is 0.1732 millimeter.If R represents the bottom surface radius of circle of described hemispherical salient point, the R value value in identical zone is consistent as far as possible.The R value is taken as 0.02 millimeter, 0.05 millimeter, 0.06 millimeter and 0.08 millimeter successively in away from the zone of described light source distance.In the position that two adjacent light sources cross, a dark space can occur on the described light guide plate, be made as 0.08 millimeter in this dark space R value.
As shown in Figure 2,, light guide plate is divided into regional A to area I 9 measured zone altogether, respectively distinguishes brightness with the optics software simulation according to 9 standard volume methods of general LCDs brightness.The homogeneity definition is made as brightness minimum value and the peaked ratio of brightness.Simulation obtains following experimental result:
| The zone | A | B | C | D | E | F | G | H | I |
| Brill: cd/m 2 | 3347 | 3089 | 3147 | 3414 | 3585 | 3624 | 3762 | 4129 | 3854 |
Homogeneity=(3089/4129) * 100%=74.81%.
Now, more and more higher to the brightness requirement and the uniformity requirement of light guide plate, the lattice point structure of so traditional light guide plate has been difficult to satisfy higher properties of product requirement.
The utility model content
The technical problems to be solved in the utility model is that the light-emitting uniformity of raising light guide plate improves light simultaneously from the probability that light guide plate derives, and increases the display brightness of whole LCDs.
From light source, especially as LED pointolites such as (light emitting diodes), the light that sends planar evenly distributes by the lattice point structure on the light guide plate after a side incident of light guide plate, i.e. the effect of light guide plate is pointolite is converted into area source.In order to solve the light-emitting uniformity of light guide plate, improve the probability that light is derived from light guide plate simultaneously, increase the display brightness of whole LCDs, the technical scheme that the utility model is taked is, a kind of small-medium size module backlight, comprise, light source and light guide plate, be provided with the salient point that is arranged in the hemispherical of site dot matrix or spherical crown shape at the described light guide plate back side, described light guide plate is a light inputting end near described light source one side, the site dot matrix of being made up of described salient point is divided into the illumination exceptions area that the illumination blind area was normally distinguished and contained in illumination with light guide plate, and described illumination exceptions area is the zone near described light inputting end; The described salient point that is distributed in the normal district of described illumination exceptions area and illumination has identical shape and size, but the arrangement regulation difference; The normal district of described illumination is divided into some subregions, and from the near more subregion of described light source, described salient point row, column spacing is big more, and from described light source subregion far away more, described salient point row, column spacing is more little;
In described illumination exceptions area, the distribution of described salient point is relevant with this regional bright-dark degree, and at relative brighter light source near zone, described salient point row, column spacing is relatively large; Near the darker zone illumination blind area reaches, the row, column spacing of described salient point is less.
Described illumination exceptions area is the rectangular area of close described light inputting end, and the distribution at described salient point place, described light guide plate two right angle in this zone is the closeest, described salient point in this zone described light source intersection be distributed as time compact district; The normal district of described illumination is divided into the rectangle subregion that is parallel to described light inputting end more than two, and in the normal district of described illumination, the described salient point in the same rectangle subregion is lined up dot matrix by identical line space and column pitch.
Because the brightness of zones of different and this zone are to the distance dependent system of light source in the normal district of described illumination, near more from light source, this zone often brightness is high more, and is far away more from light source, and this regional brightness is often low more.Take above-mentioned embodiment, can realize technical problem to be solved in the utility model.
As the utility model embodiment more specifically, described salient point is hemispherical, and the span of its bottom surface radius of circle R is 0.02 millimeter to 0.08 millimeter; The span of the horizontal center of circle distance L between the circle of described hemispherical salient point bottom surface is 0.12 millimeter to 0.75 millimeter; The span of the line space H of described hemispherical salient point is 0.12 millimeter to 0.65 millimeter.
As a more excellent embodiment of the utility model, the normal zoning of described illumination is divided into 4 zones that are parallel to each other, and comprises successively from the near to the remote by the distance with described light source: first area, second area, the 3rd zone and the 4th zone.
As a more excellent embodiment of the utility model, the bottom surface radius of circle of described hemispherical salient point is 0.05 millimeter, and the L value in described the 5th zone is 0.32 millimeter, and the H value is 0.2771 millimeter; The L value in described the 6th zone is 0.20 millimeter, and the H value is 0.1732 millimeter; The L value in described SECTOR-SEVEN territory is 0.17 millimeter, and the H value is 0.1472 millimeter; The L value in described Section Eight territory is 0.15 millimeter, and the H value is 0.1299 millimeter; The L value in described the 9th zone is 0.13 millimeter, and the H value is 0.1126 millimeter, and the L value of described second dark space is got 0.16 millimeter, and the H value is got 0.1358 millimeter; The L value of described first dark space is got 0.14 millimeter, and the H value is got 0.1212 millimeter.
Described light source adopts LED, i.e. light emitting diode.
Compared with prior art, advantage of the present utility model is, has further improved the light-emitting uniformity of light guide plate, improves the probability that light derives from light guide plate, the display brightness that has increased whole LCDs simultaneously.
Description of drawings
Fig. 1 is the structural representation of lattice point structure of the module light guide plate backlight of prior art;
Fig. 2 is the area dividing synoptic diagram of 9 standard volume methods;
Fig. 3 is the structural representation of first kind of embodiment of the lattice point structure of the utility model module light guide plate backlight;
Fig. 4 is the structural representation of second kind of embodiment of the lattice point structure of the utility model module light guide plate backlight.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described further.
As shown in Figure 3, light source 20 adopts LED (light emitting diode), is the light inputting end 12 one side settings of pointolite mode over against light guide plate 10.Lattice point structure is adopted at the back side of described light guide plate 10, promptly by the identical hemispherical salient point 11 of a plurality of sizes, is arranged in the back side of described light guide plate 10 according to certain rules.Horizontal distance of center circle between the circle of adjacent described hemispherical salient point 11 bottom surfaces is made as L, and line space is made as H, and the bottom surface radius of circle of described hemispherical salient point 11 is made as R.The site dot matrix of being made up of described salient point 11 is divided into normal district 101 of illumination and the illumination exceptions area 102 that contains the illumination blind area.
The normal district 101 of described illumination be described lattice point structure with described light source 20 over against part, being generally with described light source 20 is that the part of covering of the fans is spent in center of circle expansion 110.The normal district 101 of described illumination is divided into 4 zones that are parallel to each other to described light inputting end 12, comprises successively from the near to the remote by the distance with described light source 20: first area 1, second area 2, the 3 and the 4th zone 4, the 3rd zone.In identical zone, evenly distributed between the described hemispherical salient point 11, promptly described L value is identical with the H value.
Described illumination exceptions area 102 is near described light inputting end 12, but not over against the zone of described light source 20.If adopt light source set-up mode as described in Figure 3, described illumination exceptions area 102 comprises first dark space 8 and second dark space 9.Promptly adopt two light sources 20 side by side to illuminate described light guide plate 10 simultaneously, just tend to cause and comparatively significantly dark space in first area 1, occurs, promptly near described light inputting end 12 1 sides, the dark space 9 between two described light sources 20 and the dark space 8 at light guide plate two right-angle side places.In this embodiment, this second dark space 9 and first dark space 8 not as the part of described first area 1, in described second dark space 9 and first dark space 8, the arranging density of described hemispherical salient point is far above the arranging density of hemispherical salient point 11 described in the described first area 1.
This embodiment different H values and L value under identical described R value condition being made design, adopt computer software to simulate luminance brightness, make judge by mode as shown in Figure 2, below will be different experimental results.
Fixing described R value is 0.05 millimeter.
Experiment one, the L value of described first area 1 is got 0.40 millimeter, and the H value is got 0.3464 millimeter; The L value of described second area 2 is got 0.24 millimeter, and the H value is got 0.2078 millimeter; The L value in described the 3rd zone 3 is got 0.21 millimeter, and the H value is got 0.1818 millimeter; The L value in described the 4th zone 4 is got 0.18 millimeter, and the H value is got 0.1559 millimeter; The L value of described second dark space 9 is got 0.16 millimeter, and the H value is got 0.1385 millimeter; The L value of described first dark space 8 is got 0.15 millimeter, and the H value is got 0.1299 millimeter.Experimental result is as shown in the table.
| Label | A | B | C | D | E | F | G | H | I | Average brightness |
| Brill: cd/m 2 | 3562 | 3321 | 3274 | 3459 | 3792 | 3611 | 3842 | 4025 | 3952 | 3649 |
Homogeneity=(3274/4025) * 100%=81.34%.
We can understand from experimental result, and this scheme makes the light of deriving away from the light guide plate afterbody of light source less, seems darker.
Experiment two, the L value of described first area 1 is got 0.24 millimeter, and the H value is got 0.2078 millimeter; The L value of described second area 2 is got 0.16 millimeter, and the H value is got 0.1385 millimeter; The L value in described the 3rd zone 3 is got 0.14 millimeter, and the H value is got 0.1212 millimeter; The L value in described the 4th zone 4 is got 0.125 millimeter, and the H value is got 0.1082 millimeter; The L value of described second dark space 9 is got 0.13 millimeter, and the H value is got 0.1125 millimeter; The L value of described first dark space 8 is got 0.15 millimeter, and the H value is got 0.1299 millimeter.Experimental result is as shown in the table.
| Label | A | B | C | D | E | F | G | H | I | Average brightness |
| Brill: cd/m 2 | 5412 | 5614 | 5520 | 4498 | 4510 | 4498 | 4436 | 4312 | 4351 | 4795 |
Homogeneity=(4312/5614) * 100%=76.81%.
We can understand from experimental result, and this scheme has improved the brightness that light guide plate is illuminated greatly, but near light source place and too big away from the luminance contrast at light source place, bright dipping is also inhomogeneous, and visual effect is relatively poor.
As shown in Figure 4, be more excellent embodiment of the present utility model.Different with embodiment shown in Figure 3 is, the normal district 101 of described illumination is divided into 5 zones mutually, comprises successively from the near to the remote by the distance with described light source 20: be followed successively by from the near to the remote by the distance with described light source 20: the 5th zone 51, the 6th zone 52, SECTOR-SEVEN territory 53, Section Eight territory 54 and the 9th zone 55; Described illumination exceptions area 102 comprises, first dark space 8 and second dark space 9 between described two light sources 20 at 12 liang of angles of described light inputting end.
Described R value is made as 0.05 millimeter.
The L value in described the 5th zone 51 is 0.32 millimeter, and the H value is 0.2771 millimeter; The L value in described the 6th zone 52 is 0.20 millimeter, and the H value is 0.1732 millimeter; The L value in described SECTOR-SEVEN territory (53) is 0.17 millimeter, and the H value is 0.1472 millimeter; The L value in described Section Eight territory 54 is 0.15 millimeter, and the H value is 0.1299 millimeter; The L value in described the 9th zone 55 is 0.13 millimeter, and the H value is 0.1126 millimeter, and the L value of described second dark space 9 is got 0.16 millimeter, and the H value is got 0.1358 millimeter; The L value of described first dark space 8 is got 0.14 millimeter, and the H value is got 0.1212 millimeter.
Emitting brightness result is as shown in the table.
| Label | A | B | C | D | E | F | G | H | I | Average brightness |
| Brill: cd/m 2 | 4259 | 4332 | 4427 | 4546 | 4654 | 4421 | 4623 | 4498 | 4710 | 4497 |
Homogeneity=(4259/4710) * 100%=90.42%.
The light-emitting uniformity of light guide plate is the highest, and effect is best.
Claims (8)
1, a kind of small-medium size module backlight, comprise, light source (20) and light guide plate (10), be provided with the salient point (11) that is arranged in the hemispherical of site dot matrix or spherical crown shape at described light guide plate (10) back side, described light guide plate (10) is light inputting end (12) near described light source (20) one sides, the site dot matrix of being made up of described salient point (11) is divided into the illumination exceptions area (102) that illumination is normally distinguished (101) and contained the illumination blind area with light guide plate, described illumination exceptions area (102) is the zone near described light inputting end (12), it is characterized in that:
Be distributed in described salient point (11) that described illumination exceptions area (102) and illumination normally distinguishes in (101) and have identical shape and size, but the arrangement regulation difference;
Described illumination is normally distinguished (101) and is divided into some subregions, and from the near more subregion of described light source (20), the row, column spacing of described salient point (11) is big more, and from described light source (20) subregion far away more, the row, column spacing of described salient point (11) is more little;
In described illumination exceptions area (102), the distribution of described salient point (11) is relevant with this regional bright-dark degree, and at relative brighter light source near zone, the row, column spacing of described salient point (11) is relatively large; Near the darker zone illumination blind area reaches, the row, column spacing of described salient point (11) is less.
2, small-medium size according to claim 1 module backlight, it is characterized in that, described light source (20) comprises two parallel light sources that illuminate described module backlight, described illumination exceptions area (102) is the rectangular area of the most close described light inputting end (12), the distribution at described salient point (11) place, described light guide plate (10) two right angle in this zone is the closeest, described salient point (11) in this zone described two light sources (20) intersection be distributed as time compact district; Described illumination is normally distinguished (101) and is divided into the rectangle subregion that is parallel to described light inputting end (12) more than two, normally distinguishes in (101) in described illumination, and the described salient point (11) in the same rectangle subregion is lined up dot matrix by identical line space and column pitch.
3, small-medium size according to claim 2 module backlight is characterized in that, described salient point (11) is hemispherical, and the span of its bottom surface radius of circle R is 0.02 millimeter to 0.08 millimeter; The span of the horizontal center of circle distance L between the circle of described hemispherical salient point (11) bottom surface is 0.12 millimeter to 0.7 5 millimeters; The span of the line space H of described hemispherical salient point (11) is 0.12 millimeter to 0.65 millimeter.
4, according to claim 2 or 3 described small-medium sizes module backlight, it is characterized in that, described illumination is normally distinguished (101) and is divided into 4 zones that are parallel to each other, and is followed successively by from the near to the remote by the distance with described light source (20): first area (1), second area (2), the 3rd zone (3) and the 4th zone (4);
Described illumination exceptions area (102) comprises, is positioned at first dark space (8) of (12) two jiaos of described light inputting ends and is positioned at second dark space (9) between described two light sources (20).
5, small-medium size according to claim 4 module backlight is characterized in that, the L value of described first area (1) is got 0.40 millimeter, and the H value is got 0.3464 millimeter; The L value of described second area (2) is got 0.24 millimeter, and the H value is got 0.2078 millimeter; The L value in described the 3rd zone (3) is got 0.21 millimeter, and the H value is got 0.1818 millimeter; The L value in described the 4th zone (4) is got 0.18 millimeter, and the H value is got 0.1559 millimeter; The L value of described second dark space (9) is got 0.16 millimeter, and the H value is got 0.1385 millimeter; The L value of described first dark space (8) is got 0.15 millimeter, and the H value is got 0.1299 millimeter.
6, according to claim 2 or 3 described small-medium sizes module backlight, it is characterized in that, described illumination is normally distinguished (101) and is divided into 5 zones that are parallel to each other, and is followed successively by from the near to the remote by the distance with described light source (20): the 5th zone (51), the 6th zone (52), SECTOR-SEVEN territory (53), Section Eight territory (54) and the 9th zone (55);
Described illumination exceptions area (102) comprises, is positioned at first dark space (8) of (12) two jiaos of described light inputting ends and is positioned at second dark space (9) between described two light sources (20).
7, small-medium size according to claim 6 module backlight is characterized in that, the bottom surface radius of circle of described hemispherical salient point (11) is 0.05 millimeter; The L value in described the 5th zone (51) is 0.32 millimeter, and the H value is 0.2771 millimeter; The L value in described the 6th zone (52) is 0.20 millimeter, and the H value is 0.1732 millimeter; The L value in described SECTOR-SEVEN territory (53) is 0.17 millimeter, and the H value is 0.1472 millimeter; The L value in described Section Eight territory (54) is 0.15 millimeter, and the H value is 0.1299 millimeter; The L value in described the 9th zone (55) is 0.13 millimeter, and the H value is 0.1126 millimeter, and the L value of described second dark space (9) is got 0.16 millimeter, and the H value is got 0.1358 millimeter; The L value of described first dark space (8) is got 0.14 millimeter, and the H value is got 0.1 212 millimeters.
According to claim 1,2 or 3 described small-medium sizes module backlight, it is characterized in that 8, described light source (20) adopts light emitting diode.
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2007201705503U CN201107519Y (en) | 2007-10-30 | 2007-10-30 | Back light module unit with grid point structure |
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| CNU2007201705503U CN201107519Y (en) | 2007-10-30 | 2007-10-30 | Back light module unit with grid point structure |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US8182129B2 (en) | 2008-09-01 | 2012-05-22 | Coretronic Corporation | Light guide unit and backlight module |
| CN102520518A (en) * | 2011-12-12 | 2012-06-27 | 康佳集团股份有限公司 | Processing method based on light guide plate mesh point shadow reinforcement and processing apparatus |
| CN102707371A (en) * | 2012-06-28 | 2012-10-03 | 苏州佳宏光电有限公司 | Light guide plate |
| CN101858532B (en) * | 2009-04-01 | 2012-11-28 | 乐金显示有限公司 | Back light unit and liquid crystal display using the same |
| CN103411165A (en) * | 2013-08-21 | 2013-11-27 | 东莞勤上光电股份有限公司 | Edge lighting backlight module with uniform light emission |
| CN103899980A (en) * | 2012-12-25 | 2014-07-02 | 深鑫成光电（深圳）有限公司 | Backlight module and liquid crystal display device |
| CN104279513A (en) * | 2013-07-03 | 2015-01-14 | 广东亿芯照明科技有限公司 | Unidirectional light guide plate and unidirectional light guide plate structure |
| CN105353444A (en) * | 2015-11-13 | 2016-02-24 | 重庆鑫翎创福光电科技股份有限公司 | Printing-free light guide plate structure |
| CN105929479A (en) * | 2016-04-25 | 2016-09-07 | 上海向隆电子科技有限公司 | Front light plate and design method thereof |
| CN113985516A (en) * | 2021-11-03 | 2022-01-28 | 京东方科技集团股份有限公司 | Backlight and display device |
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- 2007-10-30 CN CNU2007201705503U patent/CN201107519Y/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8182129B2 (en) | 2008-09-01 | 2012-05-22 | Coretronic Corporation | Light guide unit and backlight module |
| CN101858532B (en) * | 2009-04-01 | 2012-11-28 | 乐金显示有限公司 | Back light unit and liquid crystal display using the same |
| US8508692B2 (en) | 2009-04-01 | 2013-08-13 | Lg Display Co., Ltd. | Backlight unit and liquid crystal display using the same comprising first and second light guide plate arrays connected to and independently controlled by first and second light array driving parts respectively |
| CN102520518A (en) * | 2011-12-12 | 2012-06-27 | 康佳集团股份有限公司 | Processing method based on light guide plate mesh point shadow reinforcement and processing apparatus |
| CN102520518B (en) * | 2011-12-12 | 2016-02-03 | 康佳集团股份有限公司 | A kind of disposal route based on light guide plate mesh point shadow reinforcement and device |
| CN102707371A (en) * | 2012-06-28 | 2012-10-03 | 苏州佳宏光电有限公司 | Light guide plate |
| CN103899980A (en) * | 2012-12-25 | 2014-07-02 | 深鑫成光电（深圳）有限公司 | Backlight module and liquid crystal display device |
| CN104279513A (en) * | 2013-07-03 | 2015-01-14 | 广东亿芯照明科技有限公司 | Unidirectional light guide plate and unidirectional light guide plate structure |
| CN103411165A (en) * | 2013-08-21 | 2013-11-27 | 东莞勤上光电股份有限公司 | Edge lighting backlight module with uniform light emission |
| CN103411165B (en) * | 2013-08-21 | 2016-07-27 | 东莞勤上光电股份有限公司 | A kind of sidelight type backlight module of uniform in light emission |
| CN105353444A (en) * | 2015-11-13 | 2016-02-24 | 重庆鑫翎创福光电科技股份有限公司 | Printing-free light guide plate structure |
| CN105929479A (en) * | 2016-04-25 | 2016-09-07 | 上海向隆电子科技有限公司 | Front light plate and design method thereof |
| CN113985516A (en) * | 2021-11-03 | 2022-01-28 | 京东方科技集团股份有限公司 | Backlight and display device |
| CN113985516B (en) * | 2021-11-03 | 2023-12-12 | 京东方科技集团股份有限公司 | Backlight source and display device |
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| CP03 | Change of name, title or address |
Address after: B1, building 1, building 518109, building A1, third industrial zone, Si Li Road, Shenzhen, Silicon Valley, Guanlan Road, Baoan District, Shenzhen, Guangdong, China Patentee after: ATC Optoelectronics (Shenzhen) CO., Ltd. Address before: Building 3, building B2, special science park, Longhua Town, Baoan District, Guangdong, Shenzhen 518109, China Patentee before: ATC Optoelectronics (Shenzhen) Co., Ltd. |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080827 Termination date: 20131030 |