CN202364414U - Backlight and display device comprising same - Google Patents
Backlight and display device comprising same Download PDFInfo
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- CN202364414U CN202364414U CN2011205220461U CN201120522046U CN202364414U CN 202364414 U CN202364414 U CN 202364414U CN 2011205220461 U CN2011205220461 U CN 2011205220461U CN 201120522046 U CN201120522046 U CN 201120522046U CN 202364414 U CN202364414 U CN 202364414U
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Abstract
The utility model provides a backlight comprising a light guide plate (2), a light source (1), an optical bi-stable layer (4) and a power-up layer, wherein the light source (1) is arranged on the side surface of the light guide plate (2); the optical bi-stable layer (4) is arranged at the bottom of the light guide plate (2); and the power-up layer is arranged on the optical bi-stable layer (4) and can stimulate the optical bi-stable layer (4) to be in a light scattering state or a transparent state. Accordingly, the utility model provides a display device comprising the backlight. The backlight and the display device can be in a transparent state, an opaque state or a state with any transparency.
Description
Technical field
The utility model relates to the display fabrication techniques field, is specifically related to a kind of backlight, and the display unit that comprises said backlight.
Background technology
LCD has occupied leading position because of having characteristics such as volume is little, low in energy consumption, radiationless in current flat panel display market.In LCD, because liquid crystal itself is not luminous, it is regulated and control light, for display image on the screen that makes LCD, backlight (BLU, Back Light Unit) need be set thereafter.
In the prior art; Backlight generally comprises light source, LGP (LGP; Light Guide Plate) and the blooming group, the bottom of said LGP is provided with density difference, leaded light site not of uniform size, like strip, triangular shape, round point shape or axiolitic leaded light site.Said backlight generally can be divided into direct-light-type backlight and side-light type back light, wherein, and in side-light type back light; Light source is positioned at the side of LGP, and when light source luminescent, the light that gets into from the side of LGP is through the leaded light site scattering of LGP bottom; Thereby formation uniform surface light source; The light that said area source sends reflects, after the diffusion, optically focused, under the effect of liquid crystal layer, becomes images displayed on the liquid crystal display equipment screen through the blooming group.LGP in this common backlight is transparent, but the material that is arranged on the leaded light site of LGP bottom is nontransparent, and the gross area of leaded light site is bigger, has therefore influenced the transparency of LGP; Simultaneously,, opaque coating materials such as reflectance coating, diffusion barrier and brightness enhancement film are set on LGP generally, have further influenced the transparency of LGP, cause said backlight to be nontransparent attitude in order to improve the service efficiency of leaded light uniformity and light.
Development along with lcd technology; Occurred a kind of transparent LCD in the industry, it utilizes extraneous surround lighting as backlight, but because the transmitance very low (transmitance of liquid crystal has only 5% generally speaking) of liquid crystal; Make the light of the overwhelming majority all absorbed by liquid crystal; So rely on common surround lighting to be difficult to make the screen of LCD to reach good display effect as backlight, especially when extraneous surround lighting was dark, its display effect was poorer.And common backlight is opaque, can't be applied in the transparent LCD, and the backlight problem in the therefore transparent LCD is one of insoluble problem in the industry always.
Recently; Occur a kind of novel backlight source in the industry again, the pattern of the leaded light site of its LGP bottom adopts tiny moire, and the leaded light site gross area of this kind structure is less; Greatly improved the transparency of this backlight; Thereby can be applicable in the transparent LCD, this backlight can utilize the light source and extraneous surround lighting in it simultaneously, so reduced power consumption to a certain extent.But adopt the LCD of this kind backlight can only be in single pellucidity, when it was applied to normal office work, the complex environment background can influence the demonstration of normal picture and text on the liquid crystal display equipment screen.
The utility model content
The utility model technical problem to be solved is to existing above-mentioned defective in the prior art; Provide a kind of and present clear state, opaque attitude or regulate the backlight of the transparency of himself according to real needs, and the display unit that comprises said backlight.
Solve the technical scheme that the utility model technical problem is adopted:
Said backlight comprises LGP and the light source that is arranged on the LGP side, and wherein, said backlight also includes the optical bistability layer and powers up layer; Said optical bistability layer is arranged on the LGP bottom, and the said layer that powers up is arranged on the optical bistability layer, and it can excite said optical bistability layer and make it to be light scattering attitude or clear state.
Preferably, said power up layer comprise be arranged between optical bistability layer upside and the LGP downside on power up layer and be arranged on the following layer that powers up of optical bistability layer downside; Said backlight also includes transparent substrates, powers up layer under said and is arranged on the said transparent substrates.
Preferably; The said layer that powers up adopts one group; This group powers up layer and comprises and power up layer on symmetrically arranged one and power up layer once; Apply the electric field of different frequency through the optical bistability layer that said a group is powered up between the layer, can make said optical bistability layer be in light scattering attitude or clear state, thereby make said backlight be in opaque attitude or clear state;
Perhaps; The said layer that powers up adopts many groups; Said many groups power up layer comprise symmetrically arranged power up on a plurality of layer and a plurality of under power up layer; And each group powers up layer and includes and power up layer on symmetrically arranged one and power up layer once, through said each group being powered up the electric field that optical bistability layer between the layer applies identical or different frequency, can regulate the state of whole optical bistability layer; Make it be in light scattering attitude, clear state, or the state between light scattering attitude and clear state, thereby make said backlight be in opaque attitude, clear state or transparency states arbitrarily.
Preferably, powering up layer on said and/or powering up layer down is patterning; The gross area that powers up layer covering optical bistability layer upside on said all is not less than 90% with the following layer gross area that covers optical bistability layer downside that power up.
Further preferred, powering up layer on said all is patternings with powering up layer down; The gross area that powers up layer covering optical bistability layer upside on said all is not less than 95% with the following layer gross area that covers optical bistability layer downside that power up.Further preferred, powering up the pattern of layer on said is consistent with the pattern that powers up down layer.
Perhaps, powering up layer on said is patterning, and the said layer that powers up down is non-patterning; The gross area that powers up layer covering optical bistability layer upside on said is not less than 95%, and the said layer downside with the optical bistability layer that power up down all covers.
Preferably, said light source adopts cathode fluorescent tube or light-emitting diode; Said LGP adopts arbitrary the processing in PC, PMMA or the glass, perhaps adopts the combination in any of PC, PMMA or glass to process; Said power up in the layer on power up layer and layer all adopt transparency electrode with powering up down; Said optical bistability layer adopts bistable liquid crystal to process.
Further preferred, power up layer on said and layer all adopt ITO, PEDOT or CNT to process with powering up down.
A kind of display unit that comprises above-mentioned backlight.
The described backlight of the utility model compared with prior art has following advantage:
1.. the backlight of prior art can only present single clear state or single opaque attitude; And the said backlight of the utility model can switch it arbitrarily through electric field controls in clear state, opaque attitude, also can regulate the transparency of himself according to real needs;
2.. the bistable liquid crystal that employing can be clear state replaces the leaded light site that the employing transparent materials is processed in the common backlight, has further improved the transparency of LCD;
3.. bistable liquid crystal has electricity back and continues the characteristics that keep, only needs an electric field controls, can make long-term a certain state (clear state, opaque attitude or transparency states) arbitrarily, the little power consumption of keeping of backlight.
Description of drawings
Fig. 1 is the structural representation of backlight among the utility model embodiment 1;
Fig. 2 is the structural representation of backlight among the utility model embodiment 2;
Among the figure: the 1-light source; The 2-LGP; The last layer that powers up of 3-; 4-optical bistability layer; Power up layer under the 5-; The 6-transparent substrates.
Embodiment
For making those skilled in the art understand the technical scheme of the utility model better, below in conjunction with accompanying drawing and embodiment to the utility model backlight and comprise that the display unit of said backlight describes in further detail.
Said backlight comprises LGP 2 and the light source 1 that is arranged on LGP 2 sides, and wherein, said backlight also includes optical bistability layer 4 and powers up layer; Said optical bistability layer 4 is arranged on LGP 2 bottoms, and the said layer that powers up is arranged on the optical bistability layer 4, and it can excite said optical bistability layer 4 and make it to be light scattering attitude or clear state.
Embodiment 1:
As shown in Figure 1; In the present embodiment, said backlight comprises LGP 2, be arranged on the light source 1 of LGP 2 sides, be arranged on said LGP 2 bottoms optical bistability layer 4, be arranged on the transparent substrates 6 of optical bistability layer 4 bottom and be arranged on the optical bistability layer 4 and power up layer.Said power up layer comprise be arranged between optical bistability layer 4 upside and LGP 2 downsides on power up layer 3, and be arranged on following between optical bistability layer 4 downside and transparent substrates 6 upsides and power up layers 5.
Wherein, powering up layer 3 on said and/or powering up layer 5 down is patternings; Power up layer gross area of 3 covering optical bistability layers, 4 upside on said and all be not less than 90% with a gross area that powers up layer 5 covering optical bistability layer 4 downside down.
Consider that from actual effect powering up layer 3 on preferred all is patternings with powering up layer 5 down, and to power up the pattern of layer 3 on more preferably said be consistent with the pattern that powers up layers 5 down.Power up layer gross area of 3 covering optical bistability layers, 4 upside on said and all be not less than 95%, and be paved with the upper and lower both sides of optical bistability layer 4 as far as possible with a gross area that powers up layer 5 covering optical bistability layer 4 downside down; Consider from manufacture craft and cost angle; Also can select and power up layer 3 and power up down one of layers 5 and carry out patterning; Powering up layer 3 on preferred is patternings; Powering up layer down 5 is non-patternings, powers up the gross area that layer 3 covers optical bistability layers 4 upside on said and is not less than 95%, and said layer 5 downside with the optical bistability layer that power up down all cover.
In the present embodiment; The said layer that powers up adopts one group; This group powers up layer and comprises and power up layer 3 on symmetrically arranged one and power up layers 5 once; Apply the electric field of different frequency through the optical bistability layer 4 that said a group is powered up between the layer, can make said optical bistability layer 4 be in light scattering attitude (opaque attitude) or clear state, thereby make said backlight be in opaque attitude or clear state
Concrete; When said one group optical bistability layer 4 that powers up between the layer is applied the electric field that is higher than 200Hz; Make said optical bistability layer 4 be in the light scattering attitude, said backlight presents opaque attitude, after the light that this moment, light source 1 sent gets into LGP 2 from the side; Part light directly transfers to and powers up layer 3 and power up the optical bistability layer 4 between the layer 5 down, forms uniform surface light source through its scattering; Another part light takes place to transfer to after the total reflection in LGP 2 and powers up layer 3 and the optical bistability layer 4 that powers up down between layers 5, forms uniform surface light source through its scattering; If powering up layer 3 on said all is patternings with powering up layer 5 down; Then some light passes the optical bistability layer 4 that is not capped; Via being back in the LGP 2 after transparent substrates 6 total reflections; And in LGP 2, take place to transfer to after the total reflection and power up layer 3 and power up the optical bistability layer 4 that layer 5 is covered down, form uniform surface light source through its scattering; Can know to sum up, after the light that is sent by light source 1 gets into LGP 2, utilized to greatest extent that make it become uniform surface light source, said area source becomes images displayed on the liquid crystal display equipment screen under the effect of liquid crystal layer; When powering up layer 3 on said one group and powering up optical bistability layer 4 between layers 5 down and apply the electric field that is lower than 150Hz; Said optical bistability layer 4 is in clear state; Said backlight also presents clear state; The light scattering effect of optical bistability layer 4 at this moment disappears, and need turn off light source 1 and utilize extraneous surround lighting as light source.
Because said optical bistability layer 4 possesses bistable characteristic, promptly have the lasting characteristics that keep in electricity back, just only need an electric field controls can make a kind of state of the long-term maintenance of backlight,, thereby have the advantage of little power consumption like opaque attitude or clear state.
Said light source 1 can adopt cathode fluorescent tube (CCFL, Cold Cathode Fluorescent Lamp) or light-emitting diode (LED, Light Emitting Diode) etc.; Said LGP 2 can adopt arbitrary the processing in PC (Merlon), PMMA (polymethacrylates) or the glass, also can adopt the combination in any of PC, PMMA or glass to process; Said power up in the layer on power up layer 3 and power up down layer 5 and all adopt transparency electrode, power up on preferred said layer 3 with under power up layers 5 and all adopt ITO (tin indium oxide), PEDOT (gathering 3,4-enedioxy thiophene) or CNT to process; Said optical bistability layer 4 adopts bistable liquid crystal to process.
A kind of display unit that adopts above-mentioned backlight.
Embodiment 2:
As shown in Figure 2, the difference of present embodiment and embodiment 1 is:
The said layer that powers up adopts many groups; Said many groups power up layer and comprise that the symmetrically arranged layer 3 that powers up on a plurality of powers up layers 5 down with a plurality of; And each group powers up layer and includes and power up layer 3 on symmetrically arranged one and power up layers 5 once; Through said each group being powered up the electric field that optical bistability layer 4 between the layer applies identical or different frequency; Can regulate the state of whole optical bistability layer 4, make it be in light scattering attitude, clear state, or the state between light scattering attitude and clear state, thereby make said backlight be in opaque attitude, clear state or transparency states arbitrarily.
Concrete; When each group being powered up optical bistability layer 4 between the layer and all applies the electric field of same frequency; As when applying the electric field that is higher than 200Hz, whole optical bistability layer 4 all is in light scattering attitude (opaque attitude), and this moment, said backlight also presented opaque attitude; As when applying the electric field that is lower than 150Hz, whole optical bistability layer 4 all is in clear state, and this moment, said backlight also presented clear state.
When each group being powered up optical bistability layer 4 between the layer and applies the electric field of different frequency; The feasible optical bistability layer 4 that powers up between the layer that applies those groups of the electric field that is higher than 200Hz is in the light scattering attitude; The optical bistability layer 4 that powers up between the layer that applies those groups of the electric field that is lower than 150Hz is in clear state; Thereby can stipulate the optical bistability layer 4 that powers up between the layer of which group is applied the electric field that is higher than 200Hz according to real needs; The optical bistability layer 4 that powers up between the layer to which group applies the electric field that is lower than 150Hz, and then the transparency of the whole optical bistability layer 4 of scalable, thus the transparency of having regulated the entire backlight source.This moment, light source 1 and external environment light as the light source of backlight, were further practiced thrift the energy simultaneously.
Other structures in the present embodiment and effect are all identical with embodiment 1, repeat no more here.
It is understandable that above execution mode only is the illustrative embodiments that adopts for the principle that the utility model is described, yet the utility model is not limited thereto.For the one of ordinary skilled in the art, under the situation of spirit that does not break away from the utility model and essence, can make various modification and improvement, these modification and improvement also are regarded as the protection range of the utility model.
Claims (10)
1. backlight comprises LGP (2) and is arranged on the light source (1) of LGP (2) side, it is characterized in that said backlight also includes optical bistability layer (4) and powers up layer; Said optical bistability layer (4) is arranged on LGP (2) bottom, and the said layer that powers up is arranged on the optical bistability layer (4), and it can excite said optical bistability layer (4) and make it to be light scattering attitude or clear state.
2. backlight according to claim 1 is characterized in that, said power up layer comprise be arranged between optical bistability layer (4) upside and LGP (2) downside on following power up layer (5) that power up layer (3) and be arranged on optical bistability layer (4) downside; Said backlight also includes transparent substrates (6), powers up layer (5) under said and is arranged on the said transparent substrates (6).
3. backlight according to claim 2; It is characterized in that; The said layer that powers up adopts one group, and this group powers up layer and comprises and power up layer (3) on symmetrically arranged one and power up layer (5) once, applies the electric field of different frequency through the optical bistability layer (4) that said a group is powered up between the layer; Can make said optical bistability layer (4) be in light scattering attitude or clear state, thereby make said backlight be in opaque attitude or clear state;
Perhaps; The said layer that powers up adopts many groups; Said many groups power up layer comprise symmetrically arranged power up on a plurality of layer (3) with a plurality of under power up layer (5); And each group powers up layer and includes and power up layer (3) on symmetrically arranged one and power up layer (5) once, through said each group being powered up the electric field that optical bistability layer (4) between the layer applies identical or different frequency, can regulate the state of whole optical bistability layer (4); Make it be in light scattering attitude, clear state, or the state between light scattering attitude and clear state, thereby make said backlight be in opaque attitude, clear state or transparency states arbitrarily.
4. backlight according to claim 3 is characterized in that, powering up layer (3) on said and/or powering up layer (5) down is patterning; Power up layer gross area of (3) covering optical bistability layer (4) upside on said and all be not less than 90% with a gross area that powers up layer (5) covering optical bistability layer (4) downside down.
5. backlight according to claim 4 is characterized in that, powering up layer (3) on said all is patternings with powering up layer (5) down; Power up layer gross area of (3) covering optical bistability layer (4) upside on said and all be not less than 95% with a gross area that powers up layer (5) covering optical bistability layer (4) downside down.
6. backlight according to claim 5 is characterized in that, powering up the pattern of layer (3) on said is consistent with the pattern that powers up layer (5) down.
7. backlight according to claim 4 is characterized in that, powering up layer (3) on said is patterning, and the said layer (5) that powers up down is non-patterning; Power up the gross area that layer (3) covers optical bistability layer (4) upside on said and be not less than 95%, the said layer (5) that powers up down all covers the downside of optical bistability layer.
8. according to the described backlight of one of claim 1-7, it is characterized in that said light source (1) adopts cathode fluorescent tube or light-emitting diode; Said LGP (2) adopts arbitrary the processing in PC, PMMA or the glass, perhaps adopts the combination in any of PC, PMMA or glass to process; Said power up in the layer on power up layer (3) with under power up layer (5) and all adopt transparency electrode; Said optical bistability layer (4) adopts bistable liquid crystal to process.
9. backlight according to claim 8 is characterized in that, power up on said layer (3) with under power up layer (5) and all adopt ITO, PEDOT or CNT to process.
10. a display unit comprises backlight, it is characterized in that, said backlight adopts one of claim 1-9 described backlight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205220461U CN202364414U (en) | 2011-12-14 | 2011-12-14 | Backlight and display device comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205220461U CN202364414U (en) | 2011-12-14 | 2011-12-14 | Backlight and display device comprising same |
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| Publication Number | Publication Date |
|---|---|
| CN202364414U true CN202364414U (en) | 2012-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011205220461U Expired - Lifetime CN202364414U (en) | 2011-12-14 | 2011-12-14 | Backlight and display device comprising same |
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| CN (1) | CN202364414U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104091525A (en) * | 2014-06-20 | 2014-10-08 | 京东方科技集团股份有限公司 | Display device |
| CN105717705A (en) * | 2016-04-26 | 2016-06-29 | 京东方科技集团股份有限公司 | Backlight module and display device |
| 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 |
-
2011
- 2011-12-14 CN CN2011205220461U patent/CN202364414U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104091525A (en) * | 2014-06-20 | 2014-10-08 | 京东方科技集团股份有限公司 | Display device |
| CN104091525B (en) * | 2014-06-20 | 2016-08-17 | 京东方科技集团股份有限公司 | A kind of display device |
| US9500802B2 (en) | 2014-06-20 | 2016-11-22 | Boe Technology Group Co., Ltd. | Display apparatus |
| CN105717705A (en) * | 2016-04-26 | 2016-06-29 | 京东方科技集团股份有限公司 | Backlight module and display device |
| 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 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120801 |
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| CX01 | Expiry of patent term |