CN202815258U - Light guide plate and display device for improving shadow - Google Patents
Light guide plate and display device for improving shadow Download PDFInfo
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- CN202815258U CN202815258U CN 201220372663 CN201220372663U CN202815258U CN 202815258 U CN202815258 U CN 202815258U CN 201220372663 CN201220372663 CN 201220372663 CN 201220372663 U CN201220372663 U CN 201220372663U CN 202815258 U CN202815258 U CN 202815258U
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- 238000000034 method Methods 0.000 description 15
- 238000010586 diagram Methods 0.000 description 12
- 238000013461 design Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The utility model relates to the display field and discloses a light guide plate and a display device for improving shadow. In the light guide plate, a shadow area of the light guide plate comprises a first sub area and a second sub area. The brightness of the first sub area is lower than the brightness of the second sub area. Small net points are filled in the first sub area, so as to replace original net points in the area. Small net points are complementarily filled in gaps among original net points in the second sub area. The diameters of the small net points are smaller than the diameters of the original net points in the shadow area. According to embodiments of the utility model, the shadow area of the light guide plate can be effectively eliminated without increasing the production cost. The display device adopting the light guide plate achieves significant improvements in image resolution and image contrast and in display effect.
Description
Technical field
The utility model relates to the demonstration field, relates in particular to a kind of light guide plate of improving shadow, and the display device that comprises described light guide plate.
Background technology
For the side-light type liquid crystal display, liquid crystal panel itself is not luminous, needs backlight that reliable light source is provided, and the area source of wanting to build homogeneous then needs the design of light guide plate.There are the flaws such as lamp pearl, lamp shadow, shadow, blanking bar in just present display effect.
The shadow of light guide plate corner is a kind of flaw of eliminating of relatively being difficult to, and especially when the shadow Width is wider, when reaching 16mm, more is difficult to eliminate.For this shadow, known solution comprises following several:
1), increase a number of LED lamp, make light guide plate corner have light source irradiation to reach the elimination shadow, its shortcoming is to increase production cost.
2), increase the site diameter in light guide plate corner, remedy the shadow defective, but for large-scale shadow, the wide shadow of 16mm proposed above for example, simple increase site diameter also can't reach promising result.
3), increase light-strip at the light guide plate non-light incidence side, be furnished with the site on the light-strip, local intensive close to the light source, local sparse away from the light source reaches the effect that compensates dark angle by guiding light.The method causes production cost to increase, complex structural designs, and light-strip adheres to light guide plate and also has technological problems.
4), increase the compensating basin at Liang Jiaochu, but strengthen from the light guide plate Edge Distance for the LED lamp, simple compensation is inapplicable.
The utility model content
The technical matters that (one) will solve
The technical problems to be solved in the utility model is, how a kind of light guide plate and display device of improving shadow is provided, so that in the situation that does not increase production cost, effectively eliminates the shadow zone of light guide plate.
(2) technical scheme
For addressing the above problem, on the one hand, the utility model provides a kind of light guide plate of improving shadow, and the shadow zone of described light guide plate comprises the first subregion and the second subregion, and the brightness of described the first subregion is lower than the brightness of described the second subregion;
In described the first subregion, be filled with little site, to substitute the original site in this zone;
Original site gap location in described the second subregion replenishes and is filled with described little site;
Wherein, the diameter of described little site is less than the diameter of the original site in the described shadow zone.
On the other hand, the utility model also provides a kind of light guide plate of improving shadow, and the original site gap location in the shadow zone of described light guide plate replenishes and is filled with little site;
The diameter of described little site is less than the diameter of the original site in the described shadow zone.
On the other hand, the utility model also provides a kind of display device, and described display device comprises described light guide plate.
(3) beneficial effect
A technical scheme in the technique scheme has following advantage:
The shadow zone of described light guide plate is divided into the first the darkest subregion and the second slightly dark subregion, the less little site of diameter is set in the first subregion substitutes original site, replenish at the second subregion little site is set, thereby realize the gradual change compensation to the shadow zone, can effectively eliminate the shadow zone of light guide plate, improve transmission uniformity.Simultaneously, be set to the leaded light zone by fringe region corresponding with the shadow zone on the light guide plate, can further improve the brightness in shadow zone, be conducive to eliminate shadow.
Another technical scheme in the technique scheme has following advantage:
In the shadow zone of described light guide plate, replenish little site is set, simple in structure, be easy to processing, and can effectively eliminate the shadow zone of light guide plate, improve transmission uniformity.Simultaneously, be set to the leaded light zone by fringe region corresponding with the shadow zone on the light guide plate, can further improve the brightness in shadow zone, be conducive to eliminate shadow.
Another technical scheme in the technique scheme has following advantage:
Described display device comprises described light guide plate, because described light guide plate has been eliminated the shadow zone, thereby has indirectly improved the display effect of described display device, has improved the image definition of described display device.
Description of drawings
Fig. 1 is corner's shadow synoptic diagram of light guide plate;
Fig. 2 is the light guide plate synoptic diagram that improves shadow of the utility model embodiment one;
Fig. 3 is the light guide plate synoptic diagram that improves shadow of the utility model embodiment two;
Fig. 4 is the light guide plate synoptic diagram that improves shadow of the utility model embodiment three;
Fig. 5 is the method flow diagram that improves shadow of the utility model embodiment five;
Fig. 6 is the method flow diagram that improves shadow of the utility model embodiment six.
Wherein: among Fig. 2, Fig. 3, Fig. 4, the implication of Reference numeral is as follows:
The original site of 100-, the little site of 200-.
Embodiment
The utility model is elaborated as follows below in conjunction with drawings and Examples.
Embodiment one
Fig. 1 is corner's shadow synoptic diagram of light guide plate, and as shown in Figure 1, when the shadow width reached 16mm, even adopted luminance compensation, the shadow at elliptic region place still can't be eliminated among Fig. 1.
Shadow problem for above-mentioned corner, we again think deeply the guiding of luminous energy and utilize problem, a kind of new net-pont design mode has been proposed: the site of light guide plate corner is become the site of " random number arrangement ", by this set, can effectively eliminate this regional shadow.
Fig. 2 is the light guide plate synoptic diagram that improves shadow of the utility model embodiment one, as shown in Figure 2, the shadow zone of described light guide plate is positioned at the corner of light guide plate, and described shadow zone comprises the first subregion and the second subregion, and the brightness of described the first subregion is lower than the brightness of described the second subregion.In described the first subregion, be filled with little site 200, to substitute the original site 100 in this zone.Original site gap location in described the second subregion replenishes and is filled with described little site 200.
Wherein, the diameter of described little site 200 is less than the diameter of the original site 100 in the described shadow zone, and the diameter of described little site 200 is more than or equal to 0.25mm.In the present embodiment, the diameter of described little site 200 preferably is set to 0.35mm.
The acquisition in described shadow zone, and the division in described shadow zone generally can be finished by range estimation, when adopting range estimation to finish, often need to obtain first the material object of light guide plate, then test, and described shadow zone is determined in range estimation according to test findings.When described shadow zone was positioned at the corner of light guide plate, the luminous energy that the LED lamp at edge sends can't arrive the edge of light guide plate, the shadow zone of this moment is a dark angle, darker the closer to the bight in described dark angle, to extend from the bight to light guide plate is inner, brightness improves gradually.According to the brightness situation of change, described shadow zone can be divided into the first subregion and the second subregion with range estimation, namely the darkest subregion and slightly dark subregion.
In addition, the acquisition in described shadow zone, and the division in described shadow zone, can also finish by software emulation, when adopting software emulation to finish, need not to obtain the material object of light guide plate, only need the relevant parameter input computing machine with light guide plate, image when the sidepiece light source that the computing machine automatic imitation obtains light guide plate is lit, the image that obtains according to described simulation, can or under area of computer aided, finish the choosing of described shadow zone with range estimation, and divide and obtain described the first subregion and the second subregion.
As shown in Figure 2, when described shadow zone is positioned at light guide plate corner, the rectangular triangle of described shadow zone global approximation, namely by S, O, 3 definite triangles of Q, described the first subregion is approximate to be quadrant shape, namely take O as the center of circle, and the quadrant shape take OT and OS as radius, described the second shadow zone is the remaining area of being determined by S, T, Q, the approximate oblique triangle that is.Wherein, S, O, T, Q all are positioned at the edge of light guide plate viewing area, and particular location all obtains by range estimation or software emulation.
Those skilled in the art expect that easily when described shadow zone was positioned at other positions of light guide plate, the shape of described the first subregion and described the second subregion all can change with the change of shadow region shape.
Can see that the utility model this " random number arrangement " characteristics are that 200 positions, little site are uncertain, irregularities is as long as satisfy in the shadow zone the darkest place intensive, slightly dark place sparse the getting final product of arranging of arranging.
Particularly, the larger original site 100 of diameter is set no longer in described the first subregion, directly uses described little site 200 instead and fill.Described original site 100 is that existing light guide plate is in the site of this original setting in zone.The diameter of described little site 200 is significantly less than the diameter of original site 100, simultaneously should be more than or equal to 0.25mm, to satisfy the printing limit.Wherein, the quantity computing formula of little site 200 is: P
1=S
1/ aL.L is the area of single little site 200; S
1It is the area of the first subregion; P
1Be the quantity of the little site 200 in the first subregion; A is the first bulkfactor, and it is relevant with the spacing between the little site 200, is used for guaranteeing that the brightness of described the first subregion can be adjusted to identical with non-shadow zone.By way of example, suppose that a is 1, i.e. P
1=S
1/ L, in the time of n little site then may occurring filling described the first subregion brightness on the low side, and the higher situation of described the first subregion brightness when filling n+1 little site.Therefore, by the value of a reasonably is set, can guarantee that the brightness of described the first subregion can be adjusted to identical with non-shadow zone.In the practical application, the value of a can suitably be adjusted, and to obtain best effect, a is preferably 2 in the present embodiment.In present embodiment, the preferred diameter value of described little site 200 is 0.35mm, and the area L of single little site 200 is 0.096mm
2, simultaneously, the first subregion radius is 6.3558mm, area S
1Be 31.74mm
2So the quantity of the little site 200 of the first subregion is P=165, under the actual conditions, this numerical value can be unsteady to some extent, and impact is little.
In described the second subregion, the set-up mode that adopts little site 200 to combine with original site 100, namely the gap location in original site 100 replenishes and fills described little site 200.In this case, the quantity computing formula of little site 200 is: P
2=S
2/ bL.S
2It is the area of the second subregion; P
2Be the quantity of the little site 200 in the second subregion; B is the second bulkfactor, and it is relevant with the spacing between the little site 200, is similar to described the first bulkfactor a, and the brightness that is used for guaranteeing described the second subregion can be adjusted to identical with non-shadow zone, and b is 8 in the present embodiment.In the present embodiment, the second subregion area S
2Be 23.05, so the quantity of the little site 200 in the second subregion is P
2=30, under the actual conditions, this numerical value can be unsteady to some extent, and impact is little.
Although in above-mentioned declarative procedure, suppose that mainly described shadow zone is positioned at light guide plate corner, those skilled in the art expect that easily design concept of the present utility model can be applied to eliminate the shadow of other positions of light guide plate equally.And the shadow of light guide plate corner generally is the most serious, and when the most serious even can reach the width of 16mm, therefore, as long as can eliminate the shadow of light guide plate corner, nature can be eliminated the shadow of other positions of light guide plate.
Embodiment two
Fig. 3 is the light guide plate synoptic diagram that improves shadow of the utility model embodiment two, as shown in Figure 3, the described light guide plate of present embodiment and embodiment one described light guide plate are basic identical, its difference only is, in order further to improve the brightness in described shadow zone, be entirely the leaded light zone with the corresponding fringe region in described shadow zone on the described light guide plate.
As shown in Figure 3, when described shadow zone was positioned at light guide plate corner, the corresponding fringe region in described shadow zone was S, O among Fig. 3, T, Q, R, O ', the determined zone of P.Wherein, the P point is positioned at the side margins of light guide plate, and its height flushes on the most lower edge of below one LED lamp with the light guide plate sidepiece; O ' point is the summit, turning at the edge of light guide plate; The R point is positioned at the lower edge of light guide plate, and the horizontal range that itself and O are ordered is greater than the distance between O point and the Q point, and particular location can be determined with range estimation or software emulation.That is to say that the corresponding fringe region in described shadow zone is by the trapezoid area of described shadow zone sidepiece, and the trapezoid area of bottom, shadow zone consists of.
Simultaneously, those skilled in the art expect that easily when described shadow zone was positioned at other positions of light guide plate, the shape of its corresponding fringe region also should corresponding change.
Although these fringe regions are not used directly to show, are set to can assist the brightness that improves described shadow zone behind the leaded light zone, are conducive to eliminate shadow.
Embodiment three
Fig. 4 is the light guide plate synoptic diagram that improves shadow of the utility model embodiment three, as shown in Figure 4, original site 100 gap locations in the shadow zone of described light guide plate replenish and are filled with little site 200, and the diameter of described little site 200 is less than the diameter of the original site 100 in the described shadow zone.Among Fig. 4, when described shadow zone was positioned at the corner of described light guide plate, described shadow zone is triangle at right angles.
The diameter of described little site 200 is more than or equal to 0.25mm, and preferred diameter is 0.35mm.
The computing formula of filling the quantity of little site 200 in the described shadow zone is: P
0=S
0/ cL;
Wherein, L is the area of single little site; S
0Area for the shadow zone; P
0Be the little dot number in the shadow zone; C is the triple density coefficient, is similar to described the second bulkfactor b, and the brightness that is used for guaranteeing described shadow zone can be adjusted to identical with non-shadow zone, and it can equal described the second bulkfactor b, also can adjust according to practical application.
Simultaneously, be entirely the leaded light zone with the corresponding fringe region in described shadow zone on the described light guide plate, particularly, comprise with the corresponding fringe region in described shadow zone on the described light guide plate: be positioned at the trapezoid area of described light guide plate side margins, and the trapezoid area that is positioned at described light guide plate lower edge.
The disposal route of the described light guide plate of corresponding present embodiment comprises step:
S100: find the shadow zone on the light guide plate, the gap location of the original site in described shadow zone replenishes fills little site, and the diameter of described little site is less than the diameter of the original site in the described shadow zone.
S200: will be set to the leaded light zone fully with the corresponding fringe region in described shadow zone on the described light guide plate.
Can see that the characteristics of the described light guide plate of present embodiment are, described shadow zone not divided, whole shadow zone is carried out the additional filling in little site according to being similar to the processing mode of described the second subregion fully.The described light guide plate of present embodiment is compared embodiment one, two and more is simple and easy to realize, and also can eliminate to a certain extent the shadow zone on the light guide plate.
Embodiment four
Present embodiment relates to a kind of display device of using described light guide plate, and described display device can be LCD TV, plasm TV, computer monitor or panel computer etc.
By adopting embodiment one, embodiment two or embodiment three described light guide plate, described display device can significantly be improved image definition and contrast, improves display effect.
Embodiment five
Fig. 5 is the method flow diagram that improves shadow of the utility model embodiment five, and the utility model embodiment one described light guide plate can adopt the described method manufacturing of present embodiment to finish.
As shown in Figure 5, described method comprises step:
A: find the shadow zone on the light guide plate, described shadow zone is divided into the first subregion and the second subregion, the brightness of described the first subregion is lower than the brightness of described the second subregion.
B: in described the first subregion, fill the original site in alternative this zone, little site, the gap location of the original site in described the second subregion replenishes fills described little site, and the diameter of described little site is less than the diameter of the original site in the described shadow zone.
Embodiment six
Fig. 6 is the method flow diagram that improves shadow of the utility model embodiment six, and the utility model embodiment two described light guide plate can adopt this method manufacturing to finish.
As shown in Figure 6, the described method of present embodiment and embodiment five described methods are basic identical, and its difference only is that described method also comprises step:
C: will be set to the leaded light zone fully with the corresponding fringe region in described shadow zone on the described light guide plate.
In this step, can adopt the mode of printing-ink, the corresponding fringe region in described shadow zone is set to the leaded light zone fully.Although these fringe regions are not used directly to show, are set to can assist the brightness that improves described shadow zone behind the leaded light zone, are conducive to eliminate shadow.
The described light guide plate of improving shadow of the utility model embodiment, by the diameter little site less than original site is set in the shadow zone, do not increasing in the situation of production cost, effectively eliminate the shadow zone of light guide plate, thereby also improved the display effect of the display device that adopts described light guide plate.Simultaneously, be set to the leaded light zone by fringe region corresponding with the shadow zone on the light guide plate, can further improve the brightness in shadow zone, be conducive to eliminate shadow.
Above embodiment only is used for explanation the utility model; and be not limitation of the utility model; the those of ordinary skill in relevant technologies field; in the situation that does not break away from spirit and scope of the present utility model; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present utility model, and scope of patent protection of the present utility model should be defined by the claims.
Claims (17)
1. a light guide plate of improving shadow is characterized in that,
The shadow zone of described light guide plate comprises the first subregion and the second subregion, and the brightness of described the first subregion is lower than the brightness of described the second subregion;
In described the first subregion, be filled with little site, to substitute the original site in this zone;
Original site gap location in described the second subregion replenishes and is filled with described little site;
Wherein, the diameter of described little site is less than the diameter of the original site in the described shadow zone.
2. light guide plate as claimed in claim 1 is characterized in that, the diameter of described little site is more than or equal to 0.25mm.
3. light guide plate as claimed in claim 2 is characterized in that, the diameter of described little site is 0.35mm.
4. light guide plate as claimed in claim 1 is characterized in that, the computing formula of filling the quantity of little site in described the first subregion is: P
1=S
1/ aL;
Wherein, L is the area of single little site; S
1It is the area of the first subregion; P
1It is the little dot number in the first subregion; A is the first bulkfactor.
5. light guide plate as claimed in claim 1 is characterized in that, the computing formula of filling the quantity of little site in described the second subregion is: P
2=S
2/ bL;
Wherein, L is the area of single little site; S
2It is the area of the second subregion; P
2It is the little dot number in the second subregion; B is the second bulkfactor.
6. light guide plate as claimed in claim 1 is characterized in that, when described shadow zone was positioned at the corner of described light guide plate, described shadow zone is triangle at right angles.
7. light guide plate as claimed in claim 1 is characterized in that, when described shadow zone was positioned at the corner of described light guide plate, described the first subregion was quadrant shape, and the center of circle is positioned at the place, summit, turning of viewing area corresponding to described light guide plate.
8. light guide plate as claimed in claim 1 is characterized in that, is entirely the leaded light zone with the corresponding fringe region in described shadow zone on the described light guide plate.
9. light guide plate as claimed in claim 8, it is characterized in that, when described shadow zone is positioned at the corner of described light guide plate, comprise with the corresponding fringe region in described shadow zone on the described light guide plate: be positioned at the trapezoid area of described light guide plate side margins, and the trapezoid area that is positioned at described light guide plate lower edge.
10. a light guide plate of improving shadow is characterized in that,
Original site gap location in the shadow zone of described light guide plate replenishes and is filled with little site;
The diameter of described little site is less than the diameter of the original site in the described shadow zone.
11. light guide plate as claimed in claim 10 is characterized in that, the diameter of described little site is more than or equal to 0.25mm.
12. light guide plate as claimed in claim 11 is characterized in that, the diameter of described little site is 0.35mm.
13. light guide plate as claimed in claim 10 is characterized in that, the computing formula of filling the quantity of little site in the described shadow zone is: P
0=S
0/ cL;
Wherein, L is the area of single little site; S
0Area for the shadow zone; P
0Be the little dot number in the shadow zone; C is the triple density coefficient.
14. light guide plate as claimed in claim 10 is characterized in that, when described shadow zone was positioned at the corner of described light guide plate, described shadow zone is triangle at right angles.
15. light guide plate as claimed in claim 10 is characterized in that, is entirely the leaded light zone with the corresponding fringe region in described shadow zone on the described light guide plate.
16. light guide plate as claimed in claim 15, it is characterized in that, when described shadow zone is positioned at the corner of described light guide plate, comprise with the corresponding fringe region in described shadow zone on the described light guide plate: be positioned at the trapezoid area of described light guide plate side margins, and the trapezoid area that is positioned at described light guide plate lower edge.
17. a display device is characterized in that, described display device comprises the described light guide plate of one of claim 1 to 16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220372663 CN202815258U (en) | 2012-07-30 | 2012-07-30 | Light guide plate and display device for improving shadow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220372663 CN202815258U (en) | 2012-07-30 | 2012-07-30 | Light guide plate and display device for improving shadow |
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|---|---|
| CN202815258U true CN202815258U (en) | 2013-03-20 |
Family
ID=47874114
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|---|---|---|---|
| CN 201220372663 Expired - Lifetime CN202815258U (en) | 2012-07-30 | 2012-07-30 | Light guide plate and display device for improving shadow |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768404A (en) * | 2012-07-30 | 2012-11-07 | 青岛海信电器股份有限公司 | Method for improving shadows, light guide plate and display device |
| US9442240B2 (en) | 2012-03-16 | 2016-09-13 | Radiant Opto-Electronics Corporation | Light guide plate and light source module |
| US10866459B2 (en) | 2018-12-18 | 2020-12-15 | Xiamen Tianma Micro-Electronics Co., Ltd. | Backlight module and display device |
-
2012
- 2012-07-30 CN CN 201220372663 patent/CN202815258U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9442240B2 (en) | 2012-03-16 | 2016-09-13 | Radiant Opto-Electronics Corporation | Light guide plate and light source module |
| TWI559038B (en) * | 2012-03-16 | 2016-11-21 | 瑞儀光電股份有限公司 | Light guide plate and light source module |
| CN102768404A (en) * | 2012-07-30 | 2012-11-07 | 青岛海信电器股份有限公司 | Method for improving shadows, light guide plate and display device |
| US10866459B2 (en) | 2018-12-18 | 2020-12-15 | Xiamen Tianma Micro-Electronics Co., Ltd. | Backlight module and display device |
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| GR01 | Patent grant | ||
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Address after: 266555 Qingdao economic and Technological Development Zone, Shandong, Hong Kong Road, No. 218 Patentee after: Hisense Visual Technology Co., Ltd. Address before: 266555 Qingdao economic and Technological Development Zone, Shandong, Hong Kong Road, No. 218 Patentee before: QINGDAO HISENSE ELECTRONICS Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
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Granted publication date: 20130320 |