CN102679238B - Backlight and display device - Google Patents
Backlight and display device Download PDFInfo
- Publication number
- CN102679238B CN102679238B CN201110194234.0A CN201110194234A CN102679238B CN 102679238 B CN102679238 B CN 102679238B CN 201110194234 A CN201110194234 A CN 201110194234A CN 102679238 B CN102679238 B CN 102679238B
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- backlight
- liquid crystal
- guide plate
- light guide
- transparent
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Abstract
The invention discloses a backlight and a display and relates to the technical field of displays. The backlight comprises a transparent light guide plate, a light source arranged at one side of the light guide plate and light reflecting plates externally arranged around the light source; the backlight further comprises a transparent base and a liquid crystal layer arranged between the base and the light guide plate; the liquid crystal of the liquid crystal layer is PDLC (polymer dispersed liquid crystal) or PNLC (polymer network liquid crystal); a first transparent electrode layer is arranged on the base, and a second transparent electrode layer corresponding to the first transparent electrode layer is arranged below the light guide plate. The backlight source can find a variable balance point between the backlight and the transparent part by taking the liquid crystal as network point control; and different network point distributions can be adjusted in the common backlight in a transparent display and the transparent display.
Description
Technical field
The present invention relates to display technology field, particularly relate to and a kind ofly can be used for Transparence Display or the backlight that can switch between Transparence Display and common display two kinds of patterns and the display applying this backlight.
Background technology
At thin film field-effect pipe liquid crystal display (Thin Film Transistor-Liquid CrystalDisplay, TFT-LCD) in display, backlight is extremely important, backlight is positioned at liquid crystal display (LCD) a kind of light source behind, because LCD itself is not luminous, its display graphics or character are the results that it is modulated light, and the illumination effect of backlight will directly have influence on LCD MODULE visual effect.Three magnitudes are proposed a kind of LCD display of Transparence Display, may be used for Window Display etc., it makes use of the backlight of outside surround lighting as LCD.Because common LCD backlight is opaque, be difficult to be applied in Transparence Display, so the backlight of Transparence Display (BackLight) is an insoluble problem always.
Backlight generally comprises: light source, light guide plate (LGP), end reflector plate, optical film material, structural member (backboard, framework, lamp batten etc.).Wherein, light guide plate is arranged on the side that LCD receives incident light, and optical film material is arranged between light guide plate and LCD, and light source is arranged on the side of light guide plate, and end reflector plate is around in the outside of light guide plate, for reflection ray.In backlight, most crucial technology is the optical technology of light guide plate, light guide plate is used for converting the directional light of incidence to planar light based on light principle at random, from the light of light guide plate outgoing again through diffusion, the polarization of optical film material, and light-collecting prism sheet makes light-ray condensing and adjusts divergence of beam angle in optical film material, the area source required for formation is supplied to LCD.Light guide plate in general backlight source itself is transparent, and by printing different sites on light guide plate, light, when getting on site, scattering occurs, thus forms uniform area source.But because site is done by screen printing mode, its size is comparatively large, also causes the transparency of light guide plate bad.In addition in order to improve uniformity and the light efficiency of light guide plate, the reflectance coating of use and the opaque optical film material such as diffusion barrier and brightness enhancement film, make common light guide plate cannot be applied in Transparence Display.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is: provide a kind of and can be used for Transparence Display or the backlight that can switch between Transparence Display and common display two kinds of patterns and display.
(2) technical scheme
For solving the problem, the invention provides a kind of backlight, comprise: transparent light guide plate, the light source being arranged on described light guide plate side, the lamp reflecting plate be around in outside light source, the liquid crystal layer that this backlight also comprises transparent substrate and is arranged between substrate and described light guide plate, the liquid crystal of described liquid crystal layer is PDLC PDLC or polymer network liquid crystal PNLC, described substrate is provided with the first transparent electrode layer, described light guide plate is arranged with second transparent electrode layer corresponding with described first transparent electrode layer.
Wherein, one is had at least to be patterning in described first transparent electrode layer and described second transparent electrode layer.
Wherein, be stained with glassy layer under described light guide plate, described second transparent electrode layer is arranged on described glassy layer.
Wherein, described liquid crystal layer comprises sealed plastic box, liquid crystal and chock insulator matter.
Wherein, described light source is Cold Cathode Fluorescent fluorescent tube CCFL or LED.
Wherein, described light guide plate is made up of polycarbonate, polymetylmethacrylate or glass material, or is formed by the baseplate-laminating be made up of above-mentioned any bi-material by Optical transparent adhesive OCA.
Display provided by the invention, comprises above-mentioned backlight.
(3) beneficial effect
Backlight of the present invention and display are controlled as site by liquid crystal, liquid crystal is filled in two pieces of patterned transparent electrode, by powering up and removing electricity, the liquid crystal that can realize on patterned electrodes presents light scattering state and clear state, thus can backlight and transparent between find change equalization point; Apply different patterned electrodes, different network point distribution can also be realized, regulate in the general backlight in Transparence Display and Transparence Display.
Accompanying drawing explanation
Fig. 1 is the structural representation of the backlight according to one embodiment of the present invention.
Detailed description of the invention
The present invention propose backlight, by reference to the accompanying drawings and embodiment be described in detail as follows.
Core concept of the present invention is: by being controlled the site of liquid crystal as light guide plate, by powering up and removing electricity, the liquid crystal realized on patterned electrodes presents light scattering state and clear state, thus can backlight and transparent between find change equalization point, as the backlight of display, the transparent of backlight can be realized, for Transparence Display, especially transparent TFT-LCD display.
As shown in Figure 1, backlight according to one embodiment of the present invention display comprises: light guide plate 1, be arranged on the light source 3 of light guide plate 1 side, be around in the lamp reflecting plate 3 outside light source 2, also comprise substrate 4 and be arranged on the liquid crystal layer 5 between substrate 4 and light guide plate 1, preferred liquid crystal 5 is PDLC (Polymer Dispersed Liquid Crystal, or polymer network liquid crystal (PolymerNetwork Liquid Crystal PDLC), PNLC), substrate 4 is provided with the first transparent electrode layer 6, light guide plate 1 is arranged with second transparent electrode layer 7 corresponding with the first transparent electrode layer 6.One is had at least to be patterning in first transparent electrode layer 6 and the second transparent electrode layer 7.Preferably, the second transparent electrode layer 7 under light guide plate 1 is patterning.
Liquid crystal layer itself is nontransparent, namely can surround lighting generation scattering to external world, and when added electric field, and liquid crystal can bleach, and transparency is high, and its scattering degree is relevant to electric-field intensity.By powering up the transparency electrode of patterning, can electrode zone be realized transparent, but not electrode zone light scattering, the function of former light guide plate light scattering site is namely realized by the liquid crystal of non-electrode region.
In order to realize better transmitance, can be Bu Tong right at the second transparent electrode layer and the patterned electrodes of the first transparent electrode layer, make the covering that certain one deck is more complete, namely transparent electrode layer covers whole as far as possible, to realize higher transparency, as shown in fig. 1, when white electrode powers up, the liquid crystal that this electrode pair is answered presents clear state, and black electrodes does not power up, then the liquid crystal of its correspondence presents scattering states, as scattering netted dot.When electrode that is white and black all powers up, then liquid crystal entirety is all clear state.Also can not power up or control suitable voltage by electrode that is white, black if desired, making whole liquid crystal layer all present scattering states.Apply different patterned electrodes, different network point distribution can also be realized, the backlight in Transparence Display and transparent in regulate.Under patterned electrodes controls, realize different scatterings.
Liquid crystal layer also comprises the known structures such as necessary sealed plastic box (sealant) and chock insulator matter (spacer), again repeats no more.
In addition, light source 2 also can be Cold Cathode Fluorescent fluorescent tube CCFL or LED.Light guide plate 1 can be made up of polycarbonate, polymetylmethacrylate or glass material, or is formed by the baseplate-laminating be made up of above-mentioned any bi-material by Optical transparent adhesive (Optical Clear Adhesive, OCA).
Because common light guide plate is PC or PMMA, do transparency electrode above and certain deformation easily occurs patterning, transparency electrode first can be deposited on a glassy layer, re-use the modes such as OCA is bonding and this glassy layer and light guide plate are bonded together.
Above embodiment is only for illustration of the present invention; and be not limitation of the present invention; the those of ordinary skill of relevant technical field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all equivalent technical schemes also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (6)
1. a backlight, comprise: transparent light guide plate, the light source being arranged on described light guide plate side, the lamp reflecting plate be around in outside light source, it is characterized in that, this backlight also comprises transparent substrate and is arranged between substrate from described light guide plate, for realizing the liquid crystal layer of different network point distribution, the liquid crystal of described liquid crystal layer is PDLC PDLC or polymer network liquid crystal PNLC, described substrate is provided with the first transparent electrode layer, described light guide plate is arranged with second transparent electrode layer corresponding with described first transparent electrode layer;
One is had at least to be patterning in described first transparent electrode layer and described second transparent electrode layer.
2. backlight as claimed in claim 1, it is characterized in that, be stained with glassy layer under described light guide plate, described second transparent electrode layer is arranged on described glassy layer.
3. backlight as claimed in claim 1, it is characterized in that, described liquid crystal layer comprises sealed plastic box, liquid crystal and chock insulator matter.
4. the backlight as described in any one of claim 1-3, is characterized in that, described light source is Cold Cathode Fluorescent fluorescent tube CCFL or LED.
5. the backlight as described in any one of claim 1-3, it is characterized in that, described light guide plate is made up of polycarbonate, polymetylmethacrylate or glass material, or is formed by the baseplate-laminating be made up of above-mentioned any bi-material by Optical transparent adhesive OCA.
6. a display, is characterized in that, comprises the backlight described in any one of claim 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110194234.0A CN102679238B (en) | 2011-07-12 | 2011-07-12 | Backlight and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110194234.0A CN102679238B (en) | 2011-07-12 | 2011-07-12 | Backlight and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102679238A CN102679238A (en) | 2012-09-19 |
| CN102679238B true CN102679238B (en) | 2015-02-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110194234.0A Expired - Fee Related CN102679238B (en) | 2011-07-12 | 2011-07-12 | Backlight and display device |
Country Status (1)
| Country | Link |
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| CN (1) | CN102679238B (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103293738A (en) * | 2012-10-19 | 2013-09-11 | 上海天马微电子有限公司 | Liquid crystal display device and control method thereof |
| CN103018955A (en) * | 2012-12-27 | 2013-04-03 | 京东方科技集团股份有限公司 | Transparent display device, special glasses and display system |
| TW201531777A (en) * | 2014-02-07 | 2015-08-16 | Chunghwa Picture Tubes Ltd | Transparent display apparatus |
| CN103941458B (en) * | 2014-02-14 | 2017-01-04 | 华映视讯（吴江）有限公司 | Transparent display |
| CN105206644A (en) * | 2015-08-28 | 2015-12-30 | 京东方科技集团股份有限公司 | Transparent display assembly and display device |
| TWI564629B (en) * | 2015-12-09 | 2017-01-01 | 揚昇照明股份有限公司 | Display apparatus and displaying method thereof |
| CN106019716B (en) * | 2016-07-28 | 2019-07-02 | 京东方科技集团股份有限公司 | Backlight and its driving method, display device |
| CN106019675A (en) * | 2016-07-29 | 2016-10-12 | 京东方科技集团股份有限公司 | Optical waveguide display module, electronic equipment and making method |
| CN106292030B (en) * | 2016-08-29 | 2017-10-24 | 京东方科技集团股份有限公司 | A kind of display panel, its preparation method and display device |
| CN108614375A (en) * | 2016-12-13 | 2018-10-02 | 宏碁股份有限公司 | Display panel |
| CN107132697A (en) | 2017-07-18 | 2017-09-05 | 京东方科技集团股份有限公司 | A kind of backlight module and display device |
| CN107797338B (en) * | 2017-11-30 | 2021-03-30 | Tcl华星光电技术有限公司 | Lateral-entry field-sequential liquid crystal display and liquid crystal display device |
| CN108153079A (en) * | 2017-12-04 | 2018-06-12 | 深圳市华星光电技术有限公司 | A kind of display panel and display |
| CN108153031A (en) * | 2017-12-07 | 2018-06-12 | 深圳市华星光电技术有限公司 | A kind of display panel and display |
| CN108445578A (en) * | 2018-04-02 | 2018-08-24 | 京东方科技集团股份有限公司 | A kind of side entrance back module, display module and backlight adjusting method |
| CN108828825A (en) * | 2018-07-24 | 2018-11-16 | 深圳市华星光电技术有限公司 | Side entrance back module and liquid crystal display device |
| JP2022024203A (en) * | 2018-11-26 | 2022-02-09 | 株式会社ジャパンディスプレイ | Display device |
| CN109541849B (en) * | 2019-01-04 | 2021-10-26 | 京东方科技集团股份有限公司 | Backlight module, driving method and display panel |
| CN111812873B (en) * | 2019-04-11 | 2023-08-11 | 京东方科技集团股份有限公司 | Transparent display panel, preparation method thereof and display device |
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| CN101846270A (en) * | 2009-01-05 | 2010-09-29 | 索尼公司 | Illuminating device and display device |
| CN101963315A (en) * | 2010-10-14 | 2011-02-02 | 友达光电股份有限公司 | Light source module and liquid crystal display |
| TW201106062A (en) * | 2009-08-05 | 2011-02-16 | Chi Mei Optoelectronics Corp | Light source device, backlight module and liquid crystal display using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5258173B2 (en) * | 2006-06-05 | 2013-08-07 | 株式会社ジャパンディスプレイ | Liquid crystal display |
| KR20110028142A (en) * | 2009-09-11 | 2011-03-17 | 엘지디스플레이 주식회사 | Reflector of back light and liquid crystal display device having thereof |
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2011
- 2011-07-12 CN CN201110194234.0A patent/CN102679238B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101846270A (en) * | 2009-01-05 | 2010-09-29 | 索尼公司 | Illuminating device and display device |
| TW201106062A (en) * | 2009-08-05 | 2011-02-16 | Chi Mei Optoelectronics Corp | Light source device, backlight module and liquid crystal display using the same |
| CN101963315A (en) * | 2010-10-14 | 2011-02-02 | 友达光电股份有限公司 | Light source module and liquid crystal display |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102679238A (en) | 2012-09-19 |
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