CN203162752U - Direct-type liquid crystal display device, backlight module thereof and diffusion plate - Google Patents
Direct-type liquid crystal display device, backlight module thereof and diffusion plate Download PDFInfo
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- CN203162752U CN203162752U CN 201320161199 CN201320161199U CN203162752U CN 203162752 U CN203162752 U CN 203162752U CN 201320161199 CN201320161199 CN 201320161199 CN 201320161199 U CN201320161199 U CN 201320161199U CN 203162752 U CN203162752 U CN 203162752U
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- total reflection
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- straight aphototropism
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Abstract
The utility model relates to the technical field of panel display, and provides a direct-type backlight module, which includes a light reflecting cavity, multiple LED backlight sources mounted at the bottom of the light reflecting cavity, a diffusion plate mounted at the top of the light reflecting cavity, and an optical diaphragm arranged on the diffusion plate, wherein the diffusion plate includes a transparent baseplate; the transparent baseplate has a front surface and a back surface for receiving illuminating rays of the LED backlight sources; and multiple total reflection components for totally reflecting the light rays emitted from the back surface are arranged on the front surface. The direct-type backlight module is light and thin and low in cost, and meanwhile, is free of color cast. The utility model further discloses the diffusion plate; and the backlight module using the diffusion plate is free of color cast and improves nonuniformity of chromaticity. The utility model further discloses a direct-type liquid crystal display device using the direct-type backlight module, which has the characteristics of low cost, thinness and lightness and is free of color cast.
Description
Technical field
The utility model relates to Display Technique field, plane, more particularly, relates to a kind of down straight aphototropism mode set and the liquid crystal indicator that has used described down straight aphototropism mode set that improves the diffuser plate of the light uniformity and used described diffuser plate.
Background technology
The back light of down straight aphototropism mode set is arranged in the reflective cavity of below of its diffuser plate, and generally use led light source as back light, and led light source is a kind of spot light, and its light mainly concentrates in the low-angle scope in led light source dead ahead, thereby its illumination that shines on the diffuser plate is also inhomogeneous, and is higher in the illumination in led light source dead ahead, more departs from led light source, its illumination is more little, and what namely it illuminated is the scope zone that an illumination is weakened gradually by middle mind-set edge; Simultaneously, diffuser plate from the distance of led light source more away from, then Zhao She scope is more big.So, occur using a lot of led light sources to carry out dense arrangement, two led light source ranges of exposures are overlapped, even the light that it sends shines on the diffuser plate after mixing, so that the illumination that shines on the diffuser plate is even; To make led light source more many but make, and cost is then more high; And reduce led light source quantity, and will make the pitch(between led light source is spacing) increase, thus the illuminance that shines on the diffuser plate is inhomogeneous, thus the light uneven illumination that diffuser plate is transmitted is even, the mura(that lineament occurs is lamp shadow) problem.So, occur again, to reduce led light source quantity, the mode that increases the distance (being light mixing distance) between diffuser plate and the led light source makes the illumination that shines on the diffuser plate even; But this mode can increase the thickness of module backlight again, and this deviates from the needs of frivolous module backlight mutually with present people, thereby much producer would rather increase led light source quantity, reduces the thickness of module backlight.These two problems are summed up: the problem of H/P value size, the i.e. problem of the ratio size between the pitch of light mixing distance and LED.
In general, the more little more easy mura problem that occurs of H/P.Thereby when the mura problem not occurring, least limit H/P value is more little, then module backlight can make more frivolous, namely least limit H/P value is the smaller the better.Present most of down straight aphototropism mode set all is to have adopted secondary optical lens to reduce least limit H/P value.But along with reducing of a led light source number, as: with 32 cun down straight aphototropism mode set, from 60 initial LEDs light sources, reduce to 40 gradually, 35, about till now 13.This method can not solve fully and the mura problem occur, so on this basis, proposes a kind of method again: namely the ink printing site reduces the H/P value of least limit on diffuser plate.Its principle is: because the light that send in the led light source dead ahead is the highest through light intensity maximum, the illumination of diffuser plate, ink printing site on diffuser plate, make the light in the big place of light intensity by in the reflective cavity of ink printing site reflected back, and the little local ink printing dot density of light intensity is little, the light of reflection is few, thereby reaches the more uniform purpose of the light illumination that transmits.Thereby solve because the H/P value reduces, and the mura problem that occurs.
But, because the characteristic of printing ink, it can absorb the light (mainly being the light of blue wave band) that led light source sends a certain specific frequency spectrum in the white light, makes the led light source dead ahead more yellow than color all around through the light of diffuser plate, and the problem of colour cast namely takes place.
The utility model content
The purpose of this utility model is to provide a kind of diffuser plate, is intended to solve that current diffuser plate absorbs the light of specific frequency spectrum and the problem that causes colour cast.
The utility model is to realize like this, a kind of down straight aphototropism mode set, comprise reflective cavity, be installed on a plurality of LED-backlit light sources at the bottom of the chamber of described reflective cavity, be installed on described reflective cavity the top, chamber diffuser plate and be located at blooming piece on the described diffuser plate, described diffuser plate comprises a transparency carrier, described transparency carrier has the rear surface that a front surface and receives LED-backlit light source irradiation light, and described front surface is provided with the light that comes is penetrated in some total reflections from described rear surface total reflection member.
Particularly, described total reflection member is discrete to be distributed on the described front surface, and the regional total reflection member that illumination is high on the described front surface regional total reflection member low with respect to illumination that distribute is densely distributed.
Particularly, described total reflection member is and the integrated micro-structural of described transparency carrier.
Perhaps, described total reflection member is total reflection light particle, and is fixed on the described front surface.
Particularly, described LED-backlit light source is white LED light source or red green blue tricolor led light source.
Particularly, described a plurality of LED-backlit light source is uniformly distributed at the bottom of the chamber of described reflective cavity.
Particularly, described blooming piece comprises diffusion barrier and brightness enhancement film.
Particularly, the inner surface of described reflective cavity is fitted with reflective membrane.
Down straight aphototropism mode set of the present utility model is by the total reflection member on the diffuser plate, diffuser plate is penetrated the total reflection member of the light that comes by total reflection is set at its front surface from the rear surface, can not absorb the light of specific frequency spectrum, thereby, use the module backlight of this diffuser plate color offset phenomenon can not occur, improve the colourity inhomogeneities.Replace existing ink printing site with this total reflection member, thereby it is few to solve in down straight aphototropism mode set the LED-backlit quantity of light source, the mura problem that occurs when distance reduces between LED-backlit light source and diffuser plate, namely reduce least limit H/P value, thereby reach frivolous and purpose that reduce cost, simultaneously, color offset phenomenon can not take place again.
The another purpose of the utility model is to provide a kind of diffuser plate, be installed in the down straight aphototropism mode set, comprise a transparency carrier, described transparency carrier has the rear surface that a front surface and receives LED-backlit light source irradiation light in the described down straight aphototropism mode set, and described front surface is provided with the light that comes is penetrated in some total reflections from described rear surface total reflection member.
Diffuser plate of the present utility model owing to being that next light is penetrated in total reflection from the rear surface by the total reflection member, can not absorb light, more can not absorb the light of specific frequency spectrum, thereby, use the module backlight of this diffuser plate color offset phenomenon can not occur, improve the colourity inhomogeneities.Replace existing ink printing site with this total reflection member, can solve and the mura problem occurs, color offset phenomenon can not occur again.
The another purpose of the utility model is to provide a kind of directly-down liquid crystal display unit, comprises display panels, also comprises aforesaid down straight aphototropism mode set, and described down straight aphototropism mode set is arranged at the back side of described display panels.
Directly-down liquid crystal display unit of the present utility model has low, the frivolous characteristics of cost, color offset phenomenon can not occur simultaneously.
Description of drawings
Fig. 1 is the structural representation of a kind of down straight aphototropism mode set of providing of the utility model embodiment.
Fig. 2 is the structural representation of diffuser plate among Fig. 1.
Fig. 3 is the emit beam schematic diagram of optical path change when shining total reflection member on the diffuser plate of certain LED-backlit light source among Fig. 1.
Fig. 4 be among Fig. 1 in the zone, diffuser plate top the total reflection member with respect to the distribution schematic diagram of led light source.
Fig. 5 is the structural representation of a kind of directly-down liquid crystal display unit of providing of the utility model embodiment.
The specific embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
See also Fig. 1 and Fig. 2, the utility model embodiment disclose a kind of down straight aphototropism mode set 1 comprise reflective cavity 11, be installed on a plurality of LED-backlit light sources 12 at the bottom of the chamber of reflective cavity 11, be installed on reflective cavity 11 the top, chamber diffuser plate 13 and be located at blooming piece 14 on the diffuser plate 13.This diffuser plate 13 comprises a transparency carrier, and this transparency carrier has a rear surface 131 and a front surface 132.Rear surface 131 is incidence surface, in order to accept the light that 12 irradiations of LED-backlit light source come.132 of front surfaces will transmit by 131 light of penetrating from the rear surface.Be provided with some total reflection members 133 at front surface 132, these total reflection members 133 energy total reflections are 132 light of penetrating from the rear surface.
131 penetrate the light that come because total reflection member 133 is total reflections from the rear surface, can not absorb light, more can not absorb the light of specific frequency spectrum, thereby, use the module backlight of this diffuser plate 13 color offset phenomenon can not occur, improve the colourity inhomogeneities.Replace existing ink printing site with this total reflection member 133, can solve and the mura problem occurs, color offset phenomenon can not occur again.
See also Fig. 4, for single led back light 12, be positioned at the zone on the diffuser plate 13 in its dead ahead, illumination is the highest, and more departs from its dead ahead, and illumination weakens gradually, thereby it is also more close to be distributed in the zone of diffuser plate 13 in its dead ahead total reflection member 133, more depart from its dead ahead, total reflection member 133 is also more rare, and namely the distribution density of total reflection member 133 is directly proportional with the light illumination that is mapped to front surface 132.Thereby, the distribution of light illumination on diffuser plate 13 that LED-backlit light source 12 sends be can obtain by the distribution curve flux of LED, thereby distribution and the density of total reflection member 133 adjusted and arrange.Therefore, when the position of making diffuser plate 13 and the layout total reflection member 133 on it and density, analyze the Illumination Distribution of determining to shine on the front surface 132 earlier, come position and the density of layout total reflection member 133 again according to Illumination Distribution, for reaching illumination evenly and the mura(lamp shadow not occurring) problem generally is the total reflection member 133 at the higher location arrangements comparatively dense of front surface 132 illumination.Please consult Fig. 3 again, illumination corresponding to each LED-backlit light source 12 dead ahead is higher, thereby the total reflection member of arranging in its dead ahead 133 compares comparatively dense, interval between two total reflection members 133 is also less relatively, increase along with angle of incidence of light, it is sparse that total reflection member 133 becomes gradually, each interval also increases relatively, thereby can return reflective cavity 11 to the light total reflection of sending from LED-backlit light source 12, the illuminance that whole diffuser plate 13 is appeared, illumination is even, the solution mura(lamp shadow that reaches) purpose of problem, namely reached the purpose that reduces least limit H/P value, thereby can make this down straight aphototropism mode set 1 more frivolous and use still less LED-backlit light source 12 quantity, to reduce its cost.Because the total reflection member 133 of diffuser plate 13 is total reflection light, can not absorb the light of specific frequency spectrum, thereby, use this down straight aphototropism mode set 1 color offset phenomenon can not occur, improve the colourity inhomogeneities.
Particularly, in the present embodiment, LED-backlit light source 12 is white LED light source.LED-backlit light source 12 also can be the red green blue tricolor led light source among other embodiment.In the present embodiment, preferably a plurality of LED-backlit light sources 12 are uniformly distributed in reflective cavity 11 bottoms.So that the Illumination Distribution of layout and installation and definite LED-backlit light source 12.Blooming piece 14 comprises all light, blast, the optically focused diaphragm that diffusion barrier and brightness enhancement film etc. are auxiliary.In the present embodiment, the inner surface of reflective cavity 11 is fitted with reflective membrane, in order to light and the next light of LED-backlit light source 12 irradiations of diffuser plate 13 reflected backs is all reflexed to diffuser plate 13, takes full advantage of with the light that LED-backlit light source 12 is sent.
The utility model embodiment also discloses a kind of diffuser plate, be installed in the down straight aphototropism mode set, comprise a transparency carrier, described transparency carrier has the rear surface that a front surface and receives LED-backlit light source irradiation light in the described down straight aphototropism mode set, and described front surface is provided with the light that comes is penetrated in some total reflections from described rear surface total reflection member.Its structure is identical with structure and the effect of diffuser plate in the above-mentioned down straight aphototropism mode set with effect, and is no longer burdensome at this.
See also Fig. 5, the utility model embodiment also discloses a kind of directly-down liquid crystal display unit, comprises liquid crystal panel 2 and the aforesaid down straight aphototropism mode set 1 of being located at liquid crystal panel 2 back sides.This directly-down liquid crystal display unit has low, the frivolous characteristics of cost, color offset phenomenon can not occur simultaneously.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1. down straight aphototropism mode set, comprise reflective cavity, be installed on a plurality of LED-backlit light sources at the bottom of the chamber of described reflective cavity, be installed on described reflective cavity the top, chamber diffuser plate and be located at blooming piece on the described diffuser plate, described diffuser plate comprises a transparency carrier, described transparency carrier has the rear surface that a front surface and receives LED-backlit light source irradiation light, it is characterized in that: described front surface is provided with the light that comes is penetrated in some total reflections from described rear surface total reflection member.
2. down straight aphototropism mode set as claimed in claim 1, it is characterized in that: described total reflection member is discrete to be distributed on the described front surface, and the regional total reflection member that illumination is high on the described front surface regional total reflection member low with respect to illumination that distribute is densely distributed.
3. down straight aphototropism mode set as claimed in claim 1 is characterized in that: described total reflection member for and the integrated micro-structural of described transparency carrier.
4. down straight aphototropism mode set as claimed in claim 1, it is characterized in that: described total reflection member is total reflection light particle, and is fixed on the described front surface.
5. as each described down straight aphototropism mode set of claim 1-4, it is characterized in that: described LED-backlit light source is white LED light source or red green blue tricolor led light source.
6. as each described down straight aphototropism mode set of claim 1-4, it is characterized in that: described a plurality of LED-backlit light sources are uniformly distributed at the bottom of the chamber of described reflective cavity.
7. as each described down straight aphototropism mode set of claim 1-4, it is characterized in that: described blooming piece comprises diffusion barrier and brightness enhancement film.
8. as each described down straight aphototropism mode set of claim 1-4, it is characterized in that: the inner surface of described reflective cavity is fitted with reflective membrane.
9. diffuser plate, be installed in the down straight aphototropism mode set, comprise a transparency carrier, described transparency carrier has the rear surface that a front surface and receives LED-backlit light source irradiation light in the described down straight aphototropism mode set, it is characterized in that: described front surface is provided with the light that comes is penetrated in some total reflections from described rear surface total reflection member.
10. a directly-down liquid crystal display unit comprises display panels, it is characterized in that: also comprise each described down straight aphototropism mode set as claim 1-8, described down straight aphototropism mode set is arranged at the back side of described display panels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320161199 CN203162752U (en) | 2013-04-02 | 2013-04-02 | Direct-type liquid crystal display device, backlight module thereof and diffusion plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320161199 CN203162752U (en) | 2013-04-02 | 2013-04-02 | Direct-type liquid crystal display device, backlight module thereof and diffusion plate |
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| Publication Number | Publication Date |
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| CN203162752U true CN203162752U (en) | 2013-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320161199 Expired - Lifetime CN203162752U (en) | 2013-04-02 | 2013-04-02 | Direct-type liquid crystal display device, backlight module thereof and diffusion plate |
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| CN (1) | CN203162752U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592706A (en) * | 2013-11-14 | 2014-02-19 | 宁波激智科技股份有限公司 | Atomization film applied to large-size displayer and backlight module thereof |
| CN103592705A (en) * | 2013-11-06 | 2014-02-19 | 苏州东显光电科技有限公司 | Diffusion plate, manufacturing method thereof and backlight module |
| CN103712161A (en) * | 2013-12-23 | 2014-04-09 | 合肥京东方光电科技有限公司 | Diffusion plate, backlight module and display device |
| CN105974657A (en) * | 2016-07-26 | 2016-09-28 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN108051953A (en) * | 2018-01-12 | 2018-05-18 | 安徽芯瑞达科技股份有限公司 | A kind of high colour gamut down straight aphototropism mode set of low mixed light height |
| CN108287438A (en) * | 2018-03-30 | 2018-07-17 | 京东方科技集团股份有限公司 | Backlight module and display equipment |
| CN110366697A (en) * | 2017-02-27 | 2019-10-22 | 富士胶片株式会社 | Brightness uniformity component, back light unit and liquid crystal display device |
| CN111045253A (en) * | 2019-12-30 | 2020-04-21 | 华为技术有限公司 | Backlight module and liquid crystal display device |
-
2013
- 2013-04-02 CN CN 201320161199 patent/CN203162752U/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103592705A (en) * | 2013-11-06 | 2014-02-19 | 苏州东显光电科技有限公司 | Diffusion plate, manufacturing method thereof and backlight module |
| CN103592705B (en) * | 2013-11-06 | 2014-09-24 | 苏州东显光电科技有限公司 | Diffusion plate, manufacturing method thereof and backlight module |
| CN103592706B (en) * | 2013-11-14 | 2015-11-18 | 宁波激智科技股份有限公司 | A kind of sprayed film and backlight module thereof being applied to large-sized monitor |
| CN103592706A (en) * | 2013-11-14 | 2014-02-19 | 宁波激智科技股份有限公司 | Atomization film applied to large-size displayer and backlight module thereof |
| CN103712161A (en) * | 2013-12-23 | 2014-04-09 | 合肥京东方光电科技有限公司 | Diffusion plate, backlight module and display device |
| CN105974657A (en) * | 2016-07-26 | 2016-09-28 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN110366697A (en) * | 2017-02-27 | 2019-10-22 | 富士胶片株式会社 | Brightness uniformity component, back light unit and liquid crystal display device |
| CN110366697B (en) * | 2017-02-27 | 2022-08-23 | 富士胶片株式会社 | Brightness uniformizing member, backlight unit and liquid crystal display device |
| CN108051953A (en) * | 2018-01-12 | 2018-05-18 | 安徽芯瑞达科技股份有限公司 | A kind of high colour gamut down straight aphototropism mode set of low mixed light height |
| US11131798B2 (en) | 2018-03-30 | 2021-09-28 | Boe Technology Group Co., Ltd. | Backlight module and display device |
| CN108287438A (en) * | 2018-03-30 | 2018-07-17 | 京东方科技集团股份有限公司 | Backlight module and display equipment |
| CN111045253A (en) * | 2019-12-30 | 2020-04-21 | 华为技术有限公司 | Backlight module and liquid crystal display device |
| CN111045253B (en) * | 2019-12-30 | 2021-12-28 | 华为技术有限公司 | Backlight module and liquid crystal display device |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
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Effective date of registration: 20160201 Address after: 518057 Guangdong city of Shenzhen province Nanshan District Gao Xin Road SKYWORTH building A block 13-16 Patentee after: SHENZHEN SKYWORTH-RGB ELECTRONIC Co.,Ltd. Address before: 518000, 1 floor, SKYWORTH science and technology industrial complex, Shiyan Industrial Street, Shiyan district, Shenzhen, Baoan District, Guangdong Patentee before: SKYWORTH LCD MODULES (SHENZHEN) Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130828 |