CN101846845A - Backlight module and double-sided liquid crystal display device - Google Patents
Backlight module and double-sided liquid crystal display device Download PDFInfo
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- CN101846845A CN101846845A CN200910130649A CN200910130649A CN101846845A CN 101846845 A CN101846845 A CN 101846845A CN 200910130649 A CN200910130649 A CN 200910130649A CN 200910130649 A CN200910130649 A CN 200910130649A CN 101846845 A CN101846845 A CN 101846845A
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Abstract
The invention discloses a backlight module and a double-sided liquid crystal display device. The backlight module comprises a first light guide plate, a second light guide plate, a reflector plate, a first light source and a second light source. The reflector plate is arranged between the first light guide plate and the second light guide plate. The light source is arranged at a first light incident side of the first light guide plate, and light emitted from the first light source enters the first light guide plate and emerges from a first light emerging surface after being reflected by a first reflecting surface. The second light source is arranged at a second light incident side of the second light guide plate, and light emitted from the second light source enters the second light guide plate and emerges from a second light emerging surface after being reflected by the second reflecting surface, wherein an included angle between the light emerging direction of the first light emerging surface and the light emerging direction of the second light emerging surface ranges from 170 degrees and 179.9 degrees. Through the invention, the display effect of the double-sided liquid crystal display device can be effectively improved.
Description
Technical field
The present invention is about a kind of module backlight and double-sided liquid crystal display device, particularly relevant for a kind of module backlight and double-sided liquid crystal display device that can improve the double-sided display effect.
Background technology
The backlight module of traditional notebook computer display device is the side direction light inlet, and light source is positioned at the light guide plate side, and scattering pattern is positioned at light guide plate below, and contacts with reflector plate, thereby with the lead direction of liquid crystal cells (cell) of light source.Can optionally add blooming pieces such as diffusion sheet, prismatic lens between light guide plate and the liquid-crystalline glasses.Wherein, selecting for use of light source is cold cathode ray tube (CCFL) or light emitting diode (LED), and LED can be arranged in one-dimensional array, and array direction is parallel with the light guide plate side.The light that is sent by LED couples directly in the light guide plate and propagation.
Because reflector plate mostly is symmetrical structure greatly, both sides are all reflecting surface, and light only uses the reflecting surface of reflector plate one side in the existing framework, also promptly luminous energy can only be propagated to single exiting surface.In addition, the backlight module design at double-sided display is arranged also at present, with the both sides of reflector plate one light guide plate is set respectively, two light guide plate are provided with liquid crystal cells again with wedge type or writing board shape assembling on it.
But liquid crystal cells design with general notebook computer, in order to keep than high penetration, its Polarizer uses TN (the Twisted Nematic of no viewing angle compensation mostly, twisted-nematic) type, in conjunction with in the pointing direction of TN type liquid crystal and the liquid crystal cells processing procedure to the friction orientation of glass substrate, its contrast performance of observing panel by upward angle of visibility is relatively poor, and better by the contrast performance of downwards angle of visibility observation panel.
When tradition is used notebook computer, open after the computer protecgulum, user's eyes are the side on computers, and habituation can be opened protecgulum and be surpassed 90 degree, watches screen with the orientation of human eye.Concerning the panel of this double-sided display, its positive display surface with reverse side is 180 degree just, and the alignment direction of liquid crystal cells for the observer on both sides in the same way the time, the observer of computer user another side easily is forced to watch from upward angle of visibility, the contrast nature can be relatively poor, and the visual angle is excessive, and brightness of watching and contrast meeting are lower.This effect for double-sided display can be given a discount, and influences the normal function of double-sided display.
Summary of the invention
At above-mentioned technical matters, the invention provides a kind of easy to implement, saving space, high briliancy, double-sided display area can optionally big or small identical or different module architectures, utilize the collocation of led array and different light guide plate shapes, and the two-sided all reflectible characteristic of reflector plate, the user on double-sided liquid crystal display device both sides adds the collocation of liquid crystal cells alignment direction, so that can see preferable image quality.
Module backlight provided by the invention is used for double-sided liquid crystal display device, and this module backlight comprises first light guide plate, second light guide plate, reflector plate, first light source and secondary light source.First light guide plate has the first light inlet side, first exiting surface and first back side.Second light guide plate has the second light inlet side, second exiting surface and second back side.Reflector plate is arranged between first light guide plate and second light guide plate, and this reflector plate has first reflecting surface and second reflecting surface, and this first reflecting surface and first back side are oppositely arranged, and this second reflecting surface and second back side are oppositely arranged.First light source is arranged at the first light inlet side of first light guide plate, the light that this first light source sends enter this first light guide plate and after first reflecting surface reflection from the first exiting surface outgoing.Secondary light source is arranged at the second light inlet side of second light guide plate, the light that this secondary light source sends enter this second light guide plate and after second reflecting surface reflection from the second exiting surface outgoing.Wherein, the angle of the light direction of the light direction of first exiting surface and second exiting surface is between 170 degree are spent to 179.9.
According to module backlight of the present invention, first light source and secondary light source are led array.Further, first light source and secondary light source are top light emitting-type LED or side light emitting-type LED.
According to module backlight of the present invention, first light guide plate is wedge shape or plate light guide plate.Second light guide plate is trapezoidal or the parallelogram light guide plate.First back side of first light guide plate and second back side of second light guide plate are distributed with printing form or penetrate the patterning that forms.Further, this patterning is point-like or semi-circular pattern.
The present invention also provides a kind of double-sided liquid crystal display device, comprises above-mentioned module backlight, first liquid crystal cells and second liquid crystal cells.First liquid crystal cells is arranged at first exiting surface of module backlight.Second liquid crystal cells is arranged at second exiting surface of module backlight, and wherein the liquid crystal alignment direction of second liquid crystal cells is opposite with the liquid crystal alignment direction of first liquid crystal cells.
According to double-sided liquid crystal display device of the present invention, the varying in size of first liquid crystal cells and second liquid crystal cells.
Double-sided liquid crystal display device of the present invention also comprises blooming piece, is arranged between the module backlight and first liquid crystal cells or second liquid crystal cells.
By the present invention, can effectively improve the display effect of double-sided liquid crystal display device.
Description of drawings
Fig. 1 is the structural representation of the module backlight of one embodiment of the invention.
Fig. 2 is the structural representation of the module backlight of another embodiment of the present invention.
Fig. 3 is the structural representation of the module backlight of further embodiment of this invention.
Fig. 4 is the structural representation of the double-sided liquid crystal display device of one embodiment of the invention.
Fig. 5 is a double-sided liquid crystal display device of the present invention synoptic diagram when using.
Fig. 6, Fig. 7 and Fig. 8 are respectively the structural representation of the double-sided liquid crystal display device of different embodiments of the invention.
Embodiment
For making purpose of the present invention, structure, feature and function thereof there are further understanding, cooperate embodiment to be described in detail as follows now.
See also Fig. 1, Fig. 1 is the structural representation of the module backlight 10 of one embodiment of the invention.Module 10 backlight can be used for double-sided liquid crystal display device, and this module 10 backlight comprises first light guide plate 11, second light guide plate 12, reflector plate 13, first light source 15 and secondary light source 16.First light guide plate 11 has the first light inlet side 111, first exiting surface 112 and first back side 113.Second light guide plate 12 has the second light inlet side 121, second exiting surface 122 and second back side 123.Reflector plate 13 is arranged between first light guide plate 11 and second light guide plate 12, and this reflector plate 13 has first reflecting surface 131 and second reflecting surface, 132, the first reflectings surface 131 and first back side 113 and is oppositely arranged, and second reflecting surface 132 and second back side 123 are oppositely arranged.First light source 15 be arranged at that light that the first light inlet side, 111, the first light sources 15 of first light guide plate 11 send enters first light guide plate 11 and after 131 reflections of first reflecting surface from 112 outgoing of first exiting surface.Secondary light source 16 is arranged at the second light inlet side 121 of second light guide plate 12, the light that secondary light source 16 sends enter second light guide plate 12 and after the reflection of second reflecting surface 132 from 122 outgoing of second exiting surface.Wherein, the angle of the light direction 120 of the light direction 110 of first exiting surface 112 and second exiting surface 122 is between 170 degree are spent to 179.9.
In one embodiment, first light source 15 and secondary light source 16 are led array.In actual applications, first light source 15 and secondary light source 16 can be top light emitting-type LED (TOP VIEW LED) or side light emitting-type LED (SIDE VIEW LED).With the led array that side light emitting-type LED forms, LED can be fixed on the both sides of same hard circuit board, perhaps is fixed on two soft or hard circuit boards and two back of circuit board lean on mutually.With the led array that top light emitting-type LED forms, LED be fixed on rigid or flexible circuit board on, and fixing or paste side at fixed frame.
Two light sources concentrate on the same one side in the light guide plate side, and other three sides of light guide plate are not provided with any light source.Led array is fixed on flexible circuit board or the hardboard, is 2 row and arranges, and the LED quantity of two row can be identical or different, and its light direction is in the face of the light inlet side of light guide plate.The light-emitting area of first light source 15 directly contacts with the light incident sides of first light guide plate 11, and the light-emitting area of secondary light source 16 directly contacts with the light incident sides of second light guide plate 12.
In one embodiment, second back side 123 of first back side 113 of first light guide plate 11 and second light guide plate 12 is distributed with printing form or penetrates the patterning that forms.In actual applications, this patterning can be point-like or semi-circular pattern.But two-sided all reflection rays of reflector plate 13, first light guide plate 11 all contacts with reflector plate 13 with the patterning of second light guide plate 12.
See also Fig. 2 and Fig. 3, Fig. 2 is the structural representation of the module backlight 20 of another embodiment of the present invention, and Fig. 3 is the structural representation of the module backlight 30 of further embodiment of this invention.Different with the module backlight 10 among the embodiment shown in Figure 1 is, first light guide plate 21 among Fig. 2 is the wedge shape light guide plate, and second light guide plate 22 is the parallelogram light guide plate.In this embodiment, first light source 25 and secondary light source 26 are top light emitting-type LED, and reflector plate 23 also is a double-sided reflecting.Module backlight 30 shown in Figure 3 comprises first light guide plate 31, second light guide plate 32, reflector plate 33, first light source 35 and secondary light source 36.In this embodiment, first light guide plate 35 is plate light guide plate, and second light guide plate 36 is trapezoidal light guide plate.Need to prove that the textural association of these light guide plate is not limited in above-mentioned several, so long as the angle of the light direction that satisfies first exiting surface and the light direction of second exiting surface is between 170 degree are spent to 179.9, all at the protection domain of this patent.
See also Fig. 4, Fig. 4 is the structural representation of the double-sided liquid crystal display device 40 of one embodiment of the invention.Double-sided liquid crystal display device 40 comprises above-mentioned module backlight 10, first liquid crystal cells 41 and second liquid crystal cells 42.First liquid crystal cells 41 is arranged at first exiting surface 112 of module 10 backlight.Second liquid crystal cells 42 is arranged at second exiting surface 122 of module 10 backlight, and wherein the liquid crystal alignment direction of second liquid crystal cells 42 is opposite with the liquid crystal alignment direction of first liquid crystal cells 41.
In one embodiment, double-sided liquid crystal display device 40 also comprises blooming piece 47,48 and framework 49.Between liquid crystal cells and light guide plate, optionally can place plural number and open blooming piece.Blooming piece 47 is arranged between the module 10 backlight and first liquid crystal cells 41, comprises prismatic lens, goes up diffusion sheet etc.Blooming piece 48 is arranged between the module 10 backlight and second liquid crystal cells, comprises diffusion sheet, following prismatic lens etc. down.Module 10 backlight, first liquid crystal cells 41 and second liquid crystal cells 42 can be fixed on this framework 49.
In one embodiment, first liquid crystal cells 41 and second liquid crystal cells 42 varies in size.Each liquid crystal cells comprises tft array substrate, colorized optical filtering laminar substrate at least and adds betwixt liquid crystal.Can use following mode to realize that the liquid crystal alignment direction of second liquid crystal cells 42 is opposite with the liquid crystal alignment direction of first liquid crystal cells 41.Observe from positive apparent direction, when using left-handed TN liquid crystal, the friction of tft array substrate and colorized optical filtering laminar substrate (rubbing) direction is upper left to the bottom right, can be relatively poor by the visual angle that liquid crystal cells first side is observed, and can be better by the visual angle that liquid crystal cells second side is observed.When using dextrorotation TN liquid crystal, friction (rubbing) direction of tft array substrate and colorized optical filtering laminar substrate is upper right to the lower-left, can be relatively poor by the visual angle that liquid crystal cells first side is observed, and can be better by the visual angle that liquid crystal cells second side is observed.The collocation mode of module 10 backlight and first liquid crystal cells 41 and second liquid crystal cells 42 is: second side 412 (visual angle is direction preferably) of first liquid crystal cells 41 is close light source side, and second side 422 (visual angle is direction preferably) of second liquid crystal cells 42 is away from light source side.Thus, when being watched by the two sides of double-sided liquid crystal display device, the distribution at visual angle differs 180 degree just, is symmetrical in horizontal direction.
See also Fig. 5, Fig. 5 is a double-sided liquid crystal display device of the present invention synoptic diagram when using.According to the above-mentioned module backlight and the collocation mode of liquid crystal cells, under the normal use of notebook computer 50 users (watching interior screen with view directions 51), the user on opposite watches another side screen (outer screen) can watch with the preferable direction 52 in visual angle naturally.And, can allow the subtend user to watch screen near the direction of facing 52 because the light direction of two light guide plate of module backlight has an angle 500, more improve the contrast of watching picture.
See also Fig. 6, Fig. 7 and Fig. 8, Fig. 6, Fig. 7 and Fig. 8 are respectively the structural representation of the double-sided liquid crystal display device of different embodiments of the invention.As shown in Figure 6, double-sided liquid crystal display device 60 also comprises first control circuit plate 61 and second control circuit plate 62, first liquid crystal cells 41 is connected with first control circuit plate 61 by soft board or soft board pasting chip, and via the limit, left side of framework 69 around to second liquid crystal cells 42, first control circuit plate 61 is fixed on framework 69 or other loading end.Second liquid crystal cells 42 connects second control circuit plate 62 by soft board or soft board pasting chip, and second control circuit plate 62 is fixed on framework 69 or other loading end.As shown in Figure 7, double-sided liquid crystal display device 70 comprises that the position of first fixed mount 77 and 78, two control circuit boards 71 of second fixed mount and 72 also therefore can be at the not homonymy of second liquid crystal cells 42, and same section is not given unnecessary details at this.As shown in Figure 8, the control circuit board 81 of double-sided liquid crystal display device 80 also can be arranged on the same side of framework 89, and two liquid crystal cells 41 can be identical with 42 size in the case.
By the present invention, can effectively improve the display effect of double-sided liquid crystal display device.
The present invention is described by above-mentioned related embodiment, yet the foregoing description is only for implementing example of the present invention.Must be pointed out that the embodiment that has disclosed does not limit the scope of the invention.On the contrary, change of being done and retouching without departing from the spirit and scope of the present invention all belongs to scope of patent protection of the present invention.
Claims (10)
1. a module backlight is used for double-sided liquid crystal display device, it is characterized in that comprising:
First light guide plate has the first light inlet side, first exiting surface and first back side;
Second light guide plate has the second light inlet side, second exiting surface and second back side;
Reflector plate is arranged between this first light guide plate and this second light guide plate, and this reflector plate has first reflecting surface and second reflecting surface, and this first reflecting surface and this first back side are oppositely arranged, and this second reflecting surface and this second back side are oppositely arranged;
First light source is arranged at this first light inlet side of this first light guide plate, the light that this first light source sends enter this first light guide plate and after this first reflecting surface reflection from this first exiting surface outgoing;
Secondary light source is arranged at this second light inlet side of this second light guide plate, the light that this secondary light source sends enter this second light guide plate and after this second reflecting surface reflection from this second exiting surface outgoing;
Wherein, the angle of the light direction of the light direction of this first exiting surface and this second exiting surface is between 170 degree are spent to 179.9.
2. module backlight as claimed in claim 1 is characterized in that: this first light source and this secondary light source are led array.
3. module backlight as claimed in claim 2 is characterized in that: this first light source and this secondary light source are top light emitting-type LED or side light emitting-type LED.
4. module backlight as claimed in claim 1 is characterized in that: this first light guide plate is wedge shape or plate light guide plate.
5. module backlight as claimed in claim 1 is characterized in that: this second light guide plate is trapezoidal or the parallelogram light guide plate.
6. module backlight as claimed in claim 1 is characterized in that: this first back side of this first light guide plate and this second back side of this second light guide plate are distributed with printing form or penetrate the patterning that forms.
7. module backlight as claimed in claim 6 is characterized in that: this patterning is point-like or semi-circular pattern.
8. double-sided liquid crystal display device is characterized in that comprising:
As each described module backlight among the claim 1-7;
First liquid crystal cells is arranged at this first exiting surface of this module backlight;
Second liquid crystal cells is arranged at this second exiting surface of this module backlight, and wherein the liquid crystal alignment direction of this second liquid crystal cells is opposite with the liquid crystal alignment direction of this first liquid crystal cells.
9. double-sided liquid crystal display device as claimed in claim 8 is characterized in that: the varying in size of this first liquid crystal cells and this second liquid crystal cells.
10. double-sided liquid crystal display device as claimed in claim 8 is characterized in that also comprising: blooming piece is arranged between this module backlight and this first liquid crystal cells or this second liquid crystal cells.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910130649A CN101846845A (en) | 2009-03-23 | 2009-03-23 | Backlight module and double-sided liquid crystal display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910130649A CN101846845A (en) | 2009-03-23 | 2009-03-23 | Backlight module and double-sided liquid crystal display device |
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| CN101846845A true CN101846845A (en) | 2010-09-29 |
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| CN200910130649A Pending CN101846845A (en) | 2009-03-23 | 2009-03-23 | Backlight module and double-sided liquid crystal display device |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102207579A (en) * | 2011-06-16 | 2011-10-05 | 苏州茂立光电科技有限公司 | Two-way optical guiding module, double-face display and production method of two-way optical guiding module |
| CN102540568A (en) * | 2011-01-03 | 2012-07-04 | 乐金显示有限公司 | Two-way liquid crystal display device |
| CN102720995A (en) * | 2012-04-25 | 2012-10-10 | 友达光电股份有限公司 | Light emitting device and backlight module |
| CN104359053A (en) * | 2014-12-08 | 2015-02-18 | 合肥鑫晟光电科技有限公司 | Backlight module, working method thereof, and display device |
| CN104956285A (en) * | 2013-01-31 | 2015-09-30 | 惠普发展公司，有限责任合伙企业 | Multi-position display deck and antenna |
| CN105276527A (en) * | 2014-06-03 | 2016-01-27 | 云光科技股份有限公司 | Side-light type luminescence lamp |
| CN106054453A (en) * | 2016-07-11 | 2016-10-26 | 深圳天珑无线科技有限公司 | Double-faced backlight module and liquid crystal display module |
| CN106094338A (en) * | 2016-08-11 | 2016-11-09 | 京东方科技集团股份有限公司 | A kind of double-side display device and electronic equipment |
| CN106094335A (en) * | 2016-07-29 | 2016-11-09 | 奥英光电（苏州）有限公司 | Backlight module and liquid crystal display |
| WO2018126505A1 (en) * | 2017-01-09 | 2018-07-12 | 深圳市华星光电技术有限公司 | Double-sided display |
| CN110109341A (en) * | 2019-05-31 | 2019-08-09 | 宁波慈溪小家电创新设计研究院有限公司 | It is a kind of can the bi-directional display time device |
| CN110431347A (en) * | 2017-03-14 | 2019-11-08 | 昕诺飞控股有限公司 | Lighting module, lighting system and means of illumination |
| CN114415284A (en) * | 2022-01-18 | 2022-04-29 | 广州华星光电半导体显示技术有限公司 | Backlight module and display device |
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- 2009-03-23 CN CN200910130649A patent/CN101846845A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102540568A (en) * | 2011-01-03 | 2012-07-04 | 乐金显示有限公司 | Two-way liquid crystal display device |
| US8773614B2 (en) | 2011-01-03 | 2014-07-08 | Lg Display Co., Ltd. | Two-way liquid crystal display device |
| CN102540568B (en) * | 2011-01-03 | 2015-07-08 | 乐金显示有限公司 | Two-way liquid crystal display device |
| CN102207579A (en) * | 2011-06-16 | 2011-10-05 | 苏州茂立光电科技有限公司 | Two-way optical guiding module, double-face display and production method of two-way optical guiding module |
| CN102720995A (en) * | 2012-04-25 | 2012-10-10 | 友达光电股份有限公司 | Light emitting device and backlight module |
| CN102720995B (en) * | 2012-04-25 | 2014-08-06 | 友达光电股份有限公司 | Light emitting device and backlight module |
| TWI460508B (en) * | 2012-04-25 | 2014-11-11 | Au Optronics Corp | Lighting device and back light module therewith |
| CN104956285A (en) * | 2013-01-31 | 2015-09-30 | 惠普发展公司，有限责任合伙企业 | Multi-position display deck and antenna |
| CN105276527A (en) * | 2014-06-03 | 2016-01-27 | 云光科技股份有限公司 | Side-light type luminescence lamp |
| CN104359053A (en) * | 2014-12-08 | 2015-02-18 | 合肥鑫晟光电科技有限公司 | Backlight module, working method thereof, and display device |
| CN106054453A (en) * | 2016-07-11 | 2016-10-26 | 深圳天珑无线科技有限公司 | Double-faced backlight module and liquid crystal display module |
| CN106094335A (en) * | 2016-07-29 | 2016-11-09 | 奥英光电（苏州）有限公司 | Backlight module and liquid crystal display |
| CN106094338A (en) * | 2016-08-11 | 2016-11-09 | 京东方科技集团股份有限公司 | A kind of double-side display device and electronic equipment |
| CN106094338B (en) * | 2016-08-11 | 2023-06-30 | 京东方科技集团股份有限公司 | Double-sided display device and electronic equipment |
| WO2018126505A1 (en) * | 2017-01-09 | 2018-07-12 | 深圳市华星光电技术有限公司 | Double-sided display |
| CN110431347A (en) * | 2017-03-14 | 2019-11-08 | 昕诺飞控股有限公司 | Lighting module, lighting system and means of illumination |
| CN110431347B (en) * | 2017-03-14 | 2021-07-27 | 昕诺飞控股有限公司 | Lighting module, lighting system and lighting method |
| CN110109341A (en) * | 2019-05-31 | 2019-08-09 | 宁波慈溪小家电创新设计研究院有限公司 | It is a kind of can the bi-directional display time device |
| CN114415284A (en) * | 2022-01-18 | 2022-04-29 | 广州华星光电半导体显示技术有限公司 | Backlight module and display device |
| CN114415284B (en) * | 2022-01-18 | 2023-10-17 | 广州华星光电半导体显示技术有限公司 | Backlight module and display device |
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Application publication date: 20100929 |