CN108363137A - Display device - Google Patents
Display device Download PDFInfo
- Publication number
- CN108363137A CN108363137A CN201810195615.2A CN201810195615A CN108363137A CN 108363137 A CN108363137 A CN 108363137A CN 201810195615 A CN201810195615 A CN 201810195615A CN 108363137 A CN108363137 A CN 108363137A
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- Prior art keywords
- light
- layer
- waveguide
- light source
- display device
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0051—Diffusing sheet or layer
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a kind of display devices, belong to display technology field, which includes：Reflective display panel and light source module group, light source module group are located at the viewing side of reflective display panel, and light source module group includes：Collimated light source, light waveguide-layer and light emitting structures；Collimated light source is located at the side of light waveguide-layer；The surface configuration of light waveguide-layer towards reflective display panel is light-emitting surface and includes light extraction region；Light emitting structures are located at light-emitting surface and correspond to light extraction region, for so that some light in light waveguide-layer is projected from light extraction region.Technical scheme of the present invention can effectively promote the contrast of the display picture of display device.
Description
Technical field
The present invention relates to display technology field, more particularly to a kind of reflective display.
Background technology
Fig. 1 is a kind of structural schematic diagram of reflective display in the prior art, as shown in Figure 1, the reflective display
Device includes：Light source module group 2 and reflective display panel 1, light source module group 2 are generated and transmitted by out light, and some light is incident upon
Reflective display panel 1, reflective display panel 1 realize that picture is shown based on the light received.Wherein, in the prior art
Light source module group 2 includes：Light source 3 and light guide plate 4, to ensure that the light projected via reflective display panel 1 can be transmitted through leaded light
Reflectance coating can not be arranged in the side of plate 4,4 back-reflection formula display panel 1 of light guide plate.
It finds in practical applications, since reflection can not be arranged in the side of the back-reflection formula display panel 1 of light guide plate 4
Film, therefore there are light injection in the both sides of light guide plate 4.When carrying out picture display, from 4 back-reflection formula display panel of light guide plate
The light that 1 side is directly projected towards the injection of 1 side of reflective display panel and can pass through reflective display with from light guide plate 4
The light that panel 1 reflects is overlapped.
At this point, display picture and light guide plate 4 that display picture observed by user is presented by reflective display panel 1
The superposition of the presented picture of back-reflection formula display panel side light extraction.Due to 4 back-reflection formula display panel of light guide plate, 1 side
Emitting brightness is brighter, and leading to each region for the display picture that user actually observes, brighter (reflective display panel is in
Dark picture area in existing display picture is also brighter), that is, show that picture contrast is relatively low.
Invention content
The present invention is directed at least solve one of the technical problems existing in the prior art, it is proposed that a kind of display device.
To achieve the above object, the present invention also provides a kind of display devices, including：Reflective display panel and light source die
Group, the light source module group are located at the viewing side of the reflective display panel, and the light source module group includes：Collimated light source, light wave
Conducting shell and light emitting structures；
The collimated light source is located at the side of the light waveguide-layer；
The surface configuration of the light waveguide-layer towards the reflective display panel is light-emitting surface and includes light extraction region；
The light emitting structures are located at the light-emitting surface and correspond to the light extraction region, for so that in the light waveguide-layer
Some light projected from the light extraction region.
Optionally, the light emitting structures include：The refractive index of light extraction film layer, the light extraction film layer meets：
n2>n1*sinθ；
Wherein, n2For the refractive index of the light extraction film layer, n1For the refractive index of the light waveguide-layer, θ is the light waveguide-layer
In the light direction of propagation and the angle between the direction of the light waveguide-layer.
Optionally, the material of the light extraction film layer is scattering material.
Optionally, the light emitting structures include：Light extraction grating.
Optionally, the light emitting structures include：The micro- knot of raised microstructure and/or groove being set on the light-emitting surface
Structure.
Optionally, the side of the light emitting structures towards the reflective display panel is additionally provided with scattering layer.
Optionally, further include：Detection unit and control unit；
The detection unit is for detecting ambient light light intensity；
Described control unit is judging the ambient light for judging whether the ambient light light intensity is more than default light intensity
It when light intensity is more than the default light intensity, controls the collimated light source and closes, and judging that the ambient light light intensity is less than or waits
When the default light intensity, controls the collimated light source and open.
Optionally, the light source module group further includes：Target base plate, the target base plate are located at the light waveguide-layer backwards to institute
State the side of reflective display panel.
Optionally, the light source module group further includes：Waveguide cap rock, the waveguide cap rock are located at the light waveguide-layer towards institute
State the side of reflective display panel.
Optionally, the collimated light source includes：External light source and optical coupling structure；
The external light source is for generating and emitting beam；
The direction of propagation for the light that the light coupling is used to send out the external light source is adjusted, so that penetrating
It is in predetermined angle to enter to the light in the light waveguide-layer and the angle between the direction of the light waveguide-layer.
The invention has the advantages that：
The present invention provides a kind of display device, which includes：Reflective display panel and light source module group, light source
Module is located at the viewing side of reflective display panel, and light source module group includes：Collimated light source, light waveguide-layer and light emitting structures；Collimation
Light source is located at the side of light waveguide-layer；The surface configuration of light waveguide-layer towards reflective display panel is light-emitting surface and includes light extraction
Region；Light emitting structures are located at light-emitting surface and correspond to light extraction region, for making some light in light waveguide-layer from output optical zone
It projects in domain.
When light source module group in the display device is worked, the light due to carrying out optical waveguide in light waveguide-layer is only capable of
It is projected by light-emitting surface, without the light-transmissive for projecting by non-light-emitting surface, and being reflected via reflective display panel
Light source module group is crossed, therefore the light of the display device directive eyes of user is only the light reflected by reflective display panel
Line, the display picture observed by user are only the display picture that reflective display panel is presented.Compared with prior art, by
The light of optical waveguide is carried out in light waveguide-layer in the present invention to be projected by non-light-emitting surface, therefore can effectively reduce display
The brightness of dark picture area in picture, to promote the contrast of display picture.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of reflective display in the prior art；
Fig. 2 is a kind of structural schematic diagram for display device that the embodiment of the present invention one provides；
Fig. 3 is light path schematic diagram when light source module group is worked；
Fig. 4 is a kind of structural schematic diagram of display device provided by Embodiment 2 of the present invention；
Fig. 5 is a kind of structural schematic diagram for display device that the embodiment of the present invention three provides.
Specific implementation mode
To make those skilled in the art more fully understand technical scheme of the present invention, the present invention is carried below in conjunction with the accompanying drawings
A kind of display device supplied is described in detail.
Fig. 2 is a kind of structural schematic diagram for display device that the embodiment of the present invention one provides, as shown in Fig. 2, the display fills
It is set to reflective display, including：Reflective display panel 1 and light source module group 2, light source module group 2 are located at reflective display panel
The viewing side of plate 1.Wherein, light source module group 2 includes：Collimated light source 7, light waveguide-layer 5 and light emitting structures 6, collimated light source 7 are located at light
The side of ducting layer 5；The surface configuration of light waveguide-layer 5 towards reflective display panel 1 is light-emitting surface and includes several light extractions
Region；Light emitting structures 6 are between reflective display panel 1 and light waveguide-layer 5 and correspond to light extraction region, for so that light wave
Some light in conducting shell 5 is projected from light extraction region.
It should be noted that the reflective display panel 1 in the present invention and reflective display panel phase in the prior art
Together, details are not described herein again for concrete structure.
Collimated light source 7 in the present invention includes：Light source 71 and light coupling 72, wherein light source 71 can be semiconductor laser
The luminescent devices such as device, semiconductor light-emitting-diode, organic electroluminescent LED or electroluminescent device.Light coupling 72 can be with
The direction of propagation of the light sent out to light source 71 is adjusted, so that after the light projected from light coupling 72 is incident upon light waveguide-layer
It is predetermined angle (can be designed according to actual needs) with the angle between the direction of light waveguide-layer 5, to ensure
Light can send out total reflection in light waveguide-layer 5, realize optical waveguide.In the present embodiment optionally, light coupling 72 is prism.
Fig. 3 is light path schematic diagram when light source module group is worked, as shown in figure 3, in the present invention, when light source module group 2
When being worked, collimated light source 7 is generated and transmitted by out light, which injects in light waveguide-layer 5.In light waveguide-layer 5, it is incident upon
It light-emitting surface and positioned at the light of non-outgoing area and is incident upon the light of non-light-emitting surface and can be totally reflected；At the same time, exist
Under the action of light emitting structures 6, it is incident upon light-emitting surface and the light positioned at light extraction region can projects, therefore, the only light-emitting surface of light waveguide-layer 5
There are light injection rather than the unglazed injection of light-emitting surface.The light directive reflective display panel 1 projected from light-emitting surface, reflective display panel
Plate 1 receives light and is reflected, and reflected light transmissive crosses light waveguide-layer 5, and injects eyes of user, to realize that picture is aobvious
Show.
When light source module group 2 in display device provided by the invention is worked, due to carrying out optical waveguide in light waveguide-layer 5
Light be only capable of projecting by light-emitting surface, without being projected by non-light-emitting surface, and reflected via reflective display panel 1
Light-transmissive crosses light source module group 2, therefore the light of the display device directive eyes of user is only to pass through reflective display panel 1
The light reflected, the display picture observed by user are only the display picture that reflective display panel 1 is presented.With it is existing
Technology is compared, and the light due to carrying out optical waveguide in the light waveguide-layer 5 in the present invention will not be projected by non-light-emitting surface, energy
The brightness for showing dark picture area in picture is effectively reduced, to promote the contrast of display picture.
In the present invention, when external ambient light is stronger, for light source module group 2 without working, external ambient light can at this time
Transmitted through light source module group 2 and directive reflective display panel, reflective display panel 1 reflects ambient light, to realize
Picture is shown.
To realize the automatic switchover of display device different working condition under strong ambient light and weak ambient light.Optionally, should
Display device further includes：Detection unit and control unit (not shown).Wherein, detection unit is for detecting ambient light light intensity；Control
Unit processed presets light intensity for judging whether ambient light light intensity is more than, and when judging that ambient light light intensity is more than default light intensity, control
Collimated light source processed is closed, and when judging that ambient light light intensity is less than or equal to default light intensity, and control collimated light source is opened.Its
In, the occurrence of default light intensity can be set and be adjusted according to actual needs.
In strong light environment, control unit control collimated light source is automatically closed, and the reflective display panel 1 can rely at this time
Ambient light carries out picture and shows；In low light environment, control unit controls collimated light source 7 and automatically turns on, what collimated light source 7 was sent out
Light is injected in light waveguide-layer 5, and some light is projected by the light extraction region of light-emitting surface and directive reflective display panel 1, reflection
The light that formula display panel 1 is projected by light waveguide-layer carries out picture and shows.It can be seen that the display device of the present invention can be according to not
The automatic switchover to working condition is realized with environment.
In the present invention, detection unit is specifically as follows photoelectric sensor, and detection unit and control unit can be integrated in instead
It penetrates in formula display panel 1 or light source module group 2.
Shown in Fig. 2 and Fig. 3, as a kind of concrete scheme of light emitting structures in the present invention, light emitting structures 6 are wrapped
It includes：Light extraction film layer 6a, the refractive index n of light extraction film layer 6a2Meet：
n2>n1*sinθ；
Wherein, n1For the refractive index of light waveguide-layer 5, θ be the light direction of propagation in light waveguide-layer 5 with perpendicular to optical waveguide
Angle between the direction of layer 5.
In light waveguide-layer 5, the region (light extraction region) being bonded with light waveguide-layer 5 due to light extraction film layer 6a is unsatisfactory for being all-trans
Condition is penetrated, therefore when thering is light to expose to light extraction region in light waveguide-layer 5, refraction can occur for some light to project light wave
Conducting shell 5, and transmitted through directive reflective display panel 1 after light extraction film layer 6a, shown so that reflective display panel 1 carries out picture
Show.
In the present embodiment, it is preferable that the material of light extraction film layer 6a is scattering material.At this point, reflected from light extraction region
Light can scatter, the angle of divergence (the propagation side of different light of light extraction film layer 6a emergent rays when passing through light extraction film layer 6a
To angle maximum value) close to 180 degree.At this point, the light-emitting uniformity of light source module group 2 can effectively be promoted, to promote display dress
The display effect set.
It should be noted that the case where material of above-mentioned light extraction film layer 6a is scattering material is only a kind of excellent in the present invention
Scheme is selected, light extraction film layer 6a may make to be provided simultaneously with light extraction function and scattering function, is conducive to the thickness that display device is thinned.
It certainly, in the present embodiment, also can be in light extraction film layer 6a towards reflective display when the scattering property of light extraction film layer 6a is poor
Additional one scattering layer of setting in the side of panel 1, to promote the light-emitting uniformity of light source module group 2, such situation does not provide accordingly
Attached drawing.
Optionally, light source module group 2 further includes：Target base plate 8 and waveguide cap rock 9, target base plate 8 are located at the back of the body of light waveguide-layer 5
To the side of reflective display panel 1, waveguide cap rock 9 is located at light waveguide-layer 5 towards the side of reflective display panel 1.Wherein,
Target base plate 8 and waveguide cap rock 9 can respectively protect the both sides of ducting layer 5.It should be noted that ensure light in wave
It is totally reflected in conducting shell 5, the refractive index of target base plate 8 and waveguide conducting shell 9 is respectively less than the refractive index of light waveguide-layer 5, the two folding
Penetrating the size of rate can set according to the direction of propagation of light in the refractive index of light waveguide-layer 5 and light waveguide-layer 5.
It should be noted that in the present invention, waveguide cap rock 9 can both cover light emitting structures 6, light extraction can not also be covered
Structure 6, all belongs to the scope of protection of the present invention.
Fig. 4 is a kind of structural schematic diagram of display device provided by Embodiment 2 of the present invention, as shown in figure 4, with shown in Fig. 1
Difference lies in the light emitting structures 6 in display device shown in Fig. 4 include display device：Light extraction grating 6b, light extraction grating 6b include
The multiple gratings strips arranged along a direction (being configured as needed).
In light waveguide-layer 5, it is incident upon light-emitting surface and is located at the light of non-outgoing area and is incident upon the light of non-light-emitting surface
It can be totally reflected；At the same time, under the action of light extraction grating 6b, it is incident upon light-emitting surface and the light positioned at light extraction region,
Which part light will occur diffraction and be projected by light-emitting surface.Therefore, the only light-emitting surface of light waveguide-layer 5 has light injection, rather than goes out
Injection that smooth surface is unglazed.
Certainly, also one scattering layer can be set towards the side of reflective display panel 1 in light extraction grating 6b in the present embodiment
10, to promote the light-emitting uniformity of light source module group 2.
Fig. 5 is a kind of structural schematic diagram for display device that the embodiment of the present invention three provides, as shown in figure 5, with shown in Fig. 1
Difference lies in the light emitting structures 6 in display device shown in Fig. 4 include display device：The protrusion being set on the light-emitting surface
Micro-structure 6c and/or groove micro-structure 6c.
In light waveguide-layer 5, it is incident upon light-emitting surface and is located at the light of non-outgoing area and is incident upon the light of non-light-emitting surface
It can be totally reflected；At the same time, since the projection/groove micro-structure 6c positioned at light extraction region constitutes rough surface, at this
Under the action of rough surface, it is incident upon light-emitting surface and the light positioned at light extraction region, scattering or diffraction will occur for which part light
And it is projected by light-emitting surface.Therefore, the only light-emitting surface of light waveguide-layer 5 has light injection rather than the unglazed injection of light-emitting surface.
Certainly, also it can be arranged one towards the side of reflective display panel 1 in projection/groove micro-structure 6c in the present embodiment
Scattering layer 10, to promote the light-emitting uniformity of light source module group 2.
It should be noted that in the present invention, when there are when scattering layer 10, waveguide cap rock 9 can both cover scattering layer 10
Scattering layer 10 can not also be covered, is all belonged to the scope of protection of the present invention.
One~embodiment of the embodiment of the present invention three each provides a kind of display device, light source die in the display device
When group is worked, due in light waveguide-layer carry out optical waveguide light be only capable of projecting by light-emitting surface, without by it is non-go out
Smooth surface projects, and crosses light source module group, therefore the display device directive via the light-transmissive that reflective display panel reflects
The light of eyes of user is only the light reflected by reflective display panel, and the display picture observed by user is only anti-
The display picture that the formula display panel of penetrating is presented.Compared with prior art, due to carrying out light wave in the light waveguide-layer in the present invention
The light led will not be projected by non-light-emitting surface, therefore can effectively reduce the brightness of dark picture area in display picture, to carry
Rise the contrast for showing picture.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, in the essence for not departing from the present invention
In the case of refreshing and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a kind of display device, which is characterized in that including：Reflective display panel and light source module group, the light source module group are located at
The viewing side of the reflective display panel, the light source module group include：Collimated light source, light waveguide-layer and light emitting structures；
The collimated light source is located at the side of the light waveguide-layer；
The surface configuration of the light waveguide-layer towards the reflective display panel is light-emitting surface and includes light extraction region；
The light emitting structures are located at the light-emitting surface and correspond to the light extraction region, for making the portion in the light waveguide-layer
Light splitter is projected from the light extraction region.
2. display device according to claim 1, which is characterized in that the light emitting structures include：Light extraction film layer, it is described go out
The refractive index of light film layer meets：
n2>n1*sinθ；
Wherein, n2For the refractive index of the light extraction film layer, n1For the refractive index of the light waveguide-layer, θ is in the light waveguide-layer
The light direction of propagation and the angle between the direction of the light waveguide-layer.
3. display device according to claim 2, which is characterized in that the material of the light extraction film layer is scattering material.
4. display device according to claim 1, which is characterized in that the light emitting structures include：Light extraction grating.
5. display device according to claim 1, which is characterized in that the light emitting structures include：It is set to the light extraction
Raised microstructure on face and/or groove micro-structure.
6. display device according to claim 1, which is characterized in that the light emitting structures are towards the reflective display panel
The side of plate is additionally provided with scattering layer.
7. display device according to claim 1, which is characterized in that further include：Detection unit and control unit；
The detection unit is for detecting ambient light light intensity；
Described control unit is judging the ambient light light intensity for judging whether the ambient light light intensity is more than default light intensity
It when more than the default light intensity, controls the collimated light source and closes, and judging the ambient light light intensity less than or equal to institute
When stating default light intensity, controls the collimated light source and open.
8. display device according to claim 1, which is characterized in that the light source module group further includes：Target base plate, it is described
Target base plate is located at the light waveguide-layer backwards to the side of the reflective display panel.
9. display device according to claim 1, which is characterized in that the light source module group further includes：Waveguide cap rock, it is described
Waveguide cap rock is located at the light waveguide-layer towards the side of the reflective display panel.
10. display device according to claim 1, which is characterized in that the collimated light source includes：External light source and optocoupler
Close structure；
The external light source is for generating and emitting beam；
The direction of propagation for the light that the light coupling is used to send out the external light source is adjusted, so that being incident upon
Light in the light waveguide-layer and the angle between the direction of the light waveguide-layer are in predetermined angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810195615.2A CN108363137A (en) | 2018-03-09 | 2018-03-09 | Display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810195615.2A CN108363137A (en) | 2018-03-09 | 2018-03-09 | Display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108363137A true CN108363137A (en) | 2018-08-03 |
Family
ID=63003679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810195615.2A Pending CN108363137A (en) | 2018-03-09 | 2018-03-09 | Display device |
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| Country | Link |
|---|---|
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| CN109765721A (en) * | 2019-01-11 | 2019-05-17 | 京东方科技集团股份有限公司 | A kind of front located light source mould group, display device, display methods and production method |
| CN114355670A (en) * | 2022-01-10 | 2022-04-15 | Tcl华星光电技术有限公司 | Light source module, liquid crystal display device and display equipment |
| CN114355672A (en) * | 2022-01-10 | 2022-04-15 | Tcl华星光电技术有限公司 | Light source module, liquid crystal display device and display equipment |
| CN114355671A (en) * | 2022-01-10 | 2022-04-15 | Tcl华星光电技术有限公司 | Light source module, liquid crystal display device and display equipment |
| CN114779524A (en) * | 2022-04-02 | 2022-07-22 | Tcl华星光电技术有限公司 | Reflective display panel and display device |
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Application publication date: 20180803 |