CN109143671B - Display device, driving method thereof and electronic rearview mirror - Google Patents
Display device, driving method thereof and electronic rearview mirror Download PDFInfo
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- CN109143671B CN109143671B CN201811145301.8A CN201811145301A CN109143671B CN 109143671 B CN109143671 B CN 109143671B CN 201811145301 A CN201811145301 A CN 201811145301A CN 109143671 B CN109143671 B CN 109143671B
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 133
- 238000002310 reflectometry Methods 0.000 claims abstract description 37
- 230000003287 optical effect Effects 0.000 claims abstract description 11
- 239000000758 substrate Substances 0.000 claims description 33
- 239000011159 matrix material Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- 238000002834 transmittance Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133553—Reflecting elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
- B60R1/02—Rear-view mirror arrangements
- B60R1/08—Rear-view mirror arrangements involving special optical features, e.g. avoiding blind spots, e.g. convex mirrors; Side-by-side associations of rear-view and other mirrors
- B60R1/083—Anti-glare mirrors, e.g. "day-night" mirrors
- B60R1/088—Anti-glare mirrors, e.g. "day-night" mirrors using a cell of electrically changeable optical characteristic, e.g. liquid-crystal or electrochromic mirrors
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Multimedia (AREA)
- Geometry (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal (AREA)
Abstract
The invention provides a display device, a driving method thereof and an electronic rearview mirror, comprising: the liquid crystal lens is positioned on the light emergent side of the display panel; the reflecting part is positioned between the display panel and the liquid crystal lens and is distributed on a main optical axis of the liquid crystal lens, so that external incident light can be gathered on the reflecting part by the liquid crystal lens by controlling the liquid crystal lens to be in a working state, and most of the incident light is reflected to the outside by the reflecting part, so that the high reflectivity of the display device is realized; the liquid crystal lens can be controlled to be in a non-working state, so that the liquid crystal lens does not focus external incident light, and the reflecting part only reflects a small part of the incident light to the outside, thereby realizing high transmittance of the liquid crystal lens, namely realizing low reflectivity and high brightness of the display device, and realizing high reflectivity and high brightness.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display device, a driving method thereof, and an electronic rearview mirror.
Background
As shown in fig. 1, fig. 1 is a schematic cross-sectional structure diagram of a conventional electronic rearview mirror, which includes a display panel 10 and a mirror surface 11 attached to a light-emitting side of the display panel 10. The mirror surface 11 is bonded with a reflective film having a certain transmittance to realize a semi-reflective and semi-transmissive function. That is, the electronic rearview mirror can observe the rear of the vehicle by reflection of the mirror surface 11, and can display parameter information of the vehicle and the like by the display panel 10.
However, the electronic rearview mirror causes low brightness of the display panel 10 when realizing high reflectivity of the mirror surface 11; when the high brightness of the display panel 10 is realized, the reflectivity of the mirror surface 11 is low, that is, the existing electronic rearview mirror cannot realize both high reflectivity and high brightness, which is not beneficial to the application of the electronic rearview mirror.
Disclosure of Invention
In view of the above, the present invention provides a display device, a driving method thereof, and an electronic rearview mirror, which can realize high brightness while realizing high reflectivity.
In order to achieve the purpose, the invention provides the following technical scheme:
a display device, comprising:
the liquid crystal lens is positioned on the light emergent side of the display panel;
the reflecting part is positioned between the display panel and the liquid crystal lens and distributed on a main optical axis of the liquid crystal lens.
Optionally, the reflection part is located on a focal plane of the liquid crystal lens.
Optionally, when the liquid crystal lens is in an operating state, the liquid crystal lens collects external incident light onto the reflection portion, and the display device is in a high-reflectivity state;
when the liquid crystal lens is in a non-working state, the liquid crystal lens does not focus external incident light, and the display device is in a low-reflectivity state.
Optionally, the display panel includes a plurality of pixels and a black matrix surrounding the plurality of pixels; in the direction perpendicular to the plane of the display panel, the reflecting part is completely overlapped with the black matrix.
Optionally, the display panel comprises a plurality of pixels and a pixel defining layer located between the pixels;
in a direction perpendicular to a plane of the display panel, the reflection part completely overlaps the pixel defining layer.
Optionally, the reflection part is provided corresponding to one or more of the pixels.
Optionally, the number of pixels corresponding to the reflection portion is greater than or equal to 1 and less than or equal to 9.
Optionally, the reflection part is positioned on one side of the liquid crystal lens close to the display panel;
or, the reflection part is positioned on one side of the display panel close to the liquid crystal lens.
Optionally, the material of the reflective portion comprises one or more of a metal and a metal oxide.
Optionally, the liquid crystal lens includes a first substrate, a second substrate, a first electrode layer located on a side of the first substrate facing the second substrate, a second electrode layer located on a side of the second substrate facing the first substrate, and a liquid crystal layer located between the first substrate and the second substrate, which are oppositely disposed;
the second electrode layer comprises a plurality of strip electrodes or concentric ring electrodes which are arranged in parallel.
A driving method of a display device, applied to the display device as described in any one of the above, comprising:
controlling the liquid crystal lens to be in a working state, wherein the liquid crystal lens gathers external incident light to the reflecting part, so that the display device is in a high-reflectivity state;
and controlling the liquid crystal lens to be in a non-working state, wherein the liquid crystal lens does not focus external incident light, and the display device is in a low-reflectivity state.
An electronic rearview mirror comprising the display device as defined in any one of the above.
Compared with the prior art, the technical scheme provided by the invention has the following advantages:
according to the display device, the driving method thereof and the electronic rearview mirror provided by the invention, the reflecting part is arranged between the display panel and the liquid crystal lens, and the reflecting part is distributed on the main optical axis of the liquid crystal lens, so that the liquid crystal lens can be controlled to be in a working state to enable the liquid crystal lens to gather external incident light to the reflecting part, and enable the reflecting part to reflect most of the incident light to the outside, so that the high reflectivity of the display device is realized, and the liquid crystal lens can be controlled to be in a non-working state to enable the liquid crystal lens not to focus the external incident light, so that the reflecting part only reflects a small part of the incident light to the outside, so that the high transmissivity of the liquid crystal lens, namely the low reflectivity and the high brightness of the display device are realized, and the high reflectivity is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic cross-sectional view of an electronic rearview mirror of the prior art;
fig. 2 is a schematic cross-sectional structure diagram of a display device according to an embodiment of the invention;
FIG. 3 is a schematic cross-sectional view of the liquid crystal lens and the reflection part shown in FIG. 2;
FIG. 4 is a schematic top view of the second electrode layer shown in FIG. 3;
FIG. 5 is a schematic top view of the second electrode layer shown in FIG. 3;
fig. 6 is a schematic cross-sectional view illustrating another display device according to an embodiment of the invention;
fig. 7 is a schematic top view of a display panel according to an embodiment of the present invention;
FIG. 8 is a schematic cross-sectional view of the display panel shown in FIG. 7;
fig. 9 is a schematic top view of a display panel according to an embodiment of the present invention;
fig. 10 is a schematic top view of another display panel according to an embodiment of the present invention;
FIG. 11 is a cross-sectional view of the display panel shown in FIG. 10;
fig. 12 is a flowchart of a driving method of a display device according to an embodiment of the invention;
fig. 13 is a schematic structural view of an electronic rearview mirror according to an embodiment of the present invention.
Detailed Description
As described in the background art, the existing electronic rearview mirrors cannot satisfy the requirements of high reflectivity and high brightness at the same time. The inventors have found that the reason for this problem is mainly that the transflective mirror surface of the conventional electronic rearview mirror is mainly realized by a metal plating layer or a highly reflective film bonded to glass, and the reflective mirror surface tends to reduce the luminance of the display panel, while the reflectance of the reflective mirror surface tends to be limited in order to increase the luminance of the display panel.
Accordingly, embodiments of the present invention provide a display device to overcome the above problems in the prior art, including: the liquid crystal lens is positioned on the light emergent side of the display panel; the reflecting part is positioned between the display panel and the liquid crystal lens and distributed on a main optical axis of the liquid crystal lens.
The embodiment of the invention also provides a driving method of a display device, which is applied to the display device and comprises the following steps: controlling the liquid crystal lens to be in a working state, wherein the liquid crystal lens gathers external incident light to the reflecting part, so that the display device is in a high-reflectivity state; and controlling the liquid crystal lens to be in a non-working state, wherein the liquid crystal lens does not focus external incident light, and the display device is in a low-reflectivity state.
The embodiment of the invention also provides the electronic rearview mirror which comprises the display device.
According to the display device, the driving method and the electronic rearview mirror provided by the invention, the reflecting part is arranged between the display panel and the liquid crystal lens, and the reflecting part is distributed on the main optical axis of the liquid crystal lens, so that the liquid crystal lens can focus external incident light to the reflecting part by controlling the liquid crystal lens to be in a working state, and the reflecting part reflects most of the incident light to the outside to realize high reflectivity of the display device.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, so that the above is the core idea of the present invention, and the above objects, features and advantages of the present invention can be more clearly understood. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a display device, which can be applied to an electronic rearview mirror to realize high reflectivity and high brightness of the electronic rearview mirror, but the invention is not limited to the display device, namely the display device can also be applied to other electronic equipment to realize high reflectivity and/or high brightness of the electronic equipment.
As shown in fig. 2, fig. 2 is a schematic cross-sectional structure diagram of a display device according to an embodiment of the present invention, where the display device includes a display panel 20, a liquid crystal lens 21, and a reflection portion 22.
In the embodiment of the present invention, the display panel 20 may be a liquid crystal display panel, and may also be a Light-Emitting Diode (LED) display panel or an Organic Light-Emitting Diode (OLED) display panel. The display panel 20 may be used to display information such as vehicle parameters or road conditions that a user may view.
The liquid crystal lens 21 is located on the light-emitting side of the display panel 20, that is, the side emitting light, and by controlling the liquid crystal lens 21 to be in the working state, the display device can be controlled to be in the high-reflectivity state, so that the user can observe the road condition behind the vehicle, and by controlling the liquid crystal lens 21 to be in the non-working state, the display device can be controlled to be in the low-reflectivity and high-definition display state, so that the user can observe the vehicle parameters or road condition information and the like displayed by the display device.
The reflective portions 22 are located between the display panel 20 and the liquid crystal lens 21, and are distributed on the main optical axis O of the liquid crystal lens 21. As shown in fig. 2, when the liquid crystal lens 21 is in an operating state, the liquid crystal layer in the liquid crystal lens 21 forms a plurality of lens-shaped structures 2140, and each lens-shaped structure 2140 has a straight line passing through the spherical center of the spherical surface, i.e., a main optical axis O.
Since the light rays incident parallel to the main optical axis O intersect at a point after passing through the liquid crystal lens 21, the reflection portion 22 located on the main optical axis O of the liquid crystal lens 21 can reflect most of the light rays converged by the lenticular structure 2140, so that the display device has a high reflectivity.
According to the display device provided by the embodiment of the invention, when the liquid crystal lens 21 is in the working state, the liquid crystal lens 21 gathers external incident light to the reflection part 22, so that the reflection part 22 reflects most of the incident light to the outside to realize high reflectivity of the display device, when the liquid crystal lens 21 is in the non-working state, the liquid crystal lens 21 does not focus the external incident light, so that the reflection part 22 reflects only a small part of the incident light to the outside to realize the display state of low reflectivity and high brightness of the display device, and thus the display device can realize high reflectivity and high brightness.
Alternatively, the reflection section 22 is located on the focal plane p of the liquid crystal lens 21. Based on this, the light rays incident parallel to the main optical axis O will all converge on the reflection portion 22 after passing through the liquid crystal lens 21, so that the reflection portion 22 can reflect more incident light rays back to the outside, thereby further increasing the reflectivity of the display device.
Alternatively, as shown in fig. 3, fig. 3 is a schematic cross-sectional structure diagram of the liquid crystal lens and the reflection part shown in fig. 2, the liquid crystal lens 21 may include a first substrate 210, a second substrate 211, a first electrode layer 212 located on a side of the first substrate 210 facing the second substrate 211, a second electrode layer 213 located on a side of the second substrate 211 facing the first substrate 210, and a liquid crystal layer 214 located between the first substrate 210 and the second substrate 211, which are oppositely disposed.
Of course, the surface of the first substrate 210 contacting the liquid crystal layer 214 may be provided with the alignment film 215, and the surface of the second substrate 211 contacting the liquid crystal layer 214 may also be provided with the alignment film 216, etc., which are not described herein again. Further, the first substrate 210 and the second substrate 211 may be transparent substrates such as glass substrates.
The first electrode layer 212 may be an entire electrode covering the first substrate 210, the second electrode layer 213 may include a plurality of parallel stripe electrodes or concentric ring electrodes, as shown in fig. 4, fig. 4 is a schematic top view structure diagram of the second electrode layer 213 shown in fig. 3, the second electrode layer 213 includes a plurality of parallel stripe electrodes 2130, and each of the electrodes 2130 is electrically connected to the driving chip 217 through a lead 2131, so that the driving chip 217 applies a voltage to the electrode 2130. As shown in fig. 5, fig. 5 is another schematic top view structure diagram of the second electrode layer 213 shown in fig. 3, the second electrode layer 213 includes a plurality of concentric ring electrodes 2131, and each electrode 2130 is electrically connected to the driving chip 217 by a lead 2131. The driving chip 217 is also electrically connected to the first electrode layer 212 to apply a voltage to the first electrode layer 212. Of course, the present invention is not limited to this, and the shape of the electrode may be set according to the actual situation.
In the structure shown in fig. 3, the reflection portion 22 is located on a side of the liquid crystal lens 21 close to the second substrate 211, but the invention is not limited thereto, and in other embodiments, the reflection portion 22 may also be located on a side of the liquid crystal lens 21 close to the first substrate 210, as long as the liquid crystal lens 21 focuses incident light from the outside onto the reflection portion 22 when operating.
In the structure shown in fig. 3, when the driving chip 217 applies a voltage to the first electrode layer 212 and the second electrode layer 213, the liquid crystal lens 21 is in an operating state, and liquid crystal molecules in the liquid crystal layer 214 rotate and change the tilt angle under the action of an electric field between the first electrode layer 212 and the second electrode layer 213, so that the liquid crystal layer 214 forms a lens-shaped structure 2140 having a birefringent lens effect. Moreover, since the second electrode layer 213 is a strip electrode as shown in fig. 4 or a concentric ring electrode as shown in fig. 5, the liquid crystal layer 214 forms a plurality of lenticular structures 2140 having a birefringent lens effect.
When the driving chip 217 no longer applies a voltage to the first electrode layer 212 and the second electrode layer 213, the liquid crystal lens 21 is in a non-operating state, liquid crystal molecules in the liquid crystal layer 214 do not rotate, and the lenticular structure 2140 is not formed, that is, the liquid crystal molecules in the liquid crystal layer 214 are arranged in parallel, external incident light passes through the liquid crystal lens 21 in parallel, and only a small portion of the light irradiates the reflection portion 22 and is reflected by the reflection portion 22.
Accordingly, when the liquid crystal lens 21 is in the operating state, high reflectance of the display device can be achieved, and when the liquid crystal lens 21 is in the non-operating state, a display state of low reflectance and high luminance of the display device can be achieved, so that the display device can achieve high reflectance and high luminance.
It should be noted that the display panel 20 may be in the display state regardless of whether the liquid crystal lens 21 is in the operating state, but of course, when the liquid crystal lens 21 is in the non-operating state, the luminance of the display panel 20 is the highest, and the display effect is the best.
In the embodiment of the present invention, the reflective portion 22 may be a sheet-like structure, that is, the reflective portion 22 has equal thickness in a direction perpendicular to the plane of the display panel 20, and the shape of the reflective portion may be a circle or a square. The material of the reflective portion 22 includes one or more of metal and metal oxide, such as metal aluminum, silver, etc., although the invention is not limited thereto, and the material of the reflective portion 22 may be other materials with high reflectivity in other embodiments.
In the embodiment of the present invention, as shown in fig. 2, the reflection portion 22 is located on a side of the liquid crystal lens 21 close to the display panel 20, however, the present invention is not limited thereto, and in other embodiments, as shown in fig. 6, fig. 6 is a schematic cross-sectional structure diagram of another display device provided in the embodiment of the present invention, and the reflection portion 22 may also be located on a side of the display panel 20 close to the liquid crystal lens 21.
When the reflection part 22 is located on the side of the liquid crystal lens 21 close to the display panel 20, a planarization layer 23 is further provided between the reflection part 22 and the display panel 20; when the reflection part 22 is located on the side of the display panel 20 close to the liquid crystal lens 21, a planarization layer 24 is further provided between the reflection part 22 and the liquid crystal lens 21.
In the embodiment of the present invention, the planarization layer 23 or 24 is provided to increase the planarization degree of the surface of the reflective portion 22, so as to facilitate the arrangement of the liquid crystal lens 21 or the display panel 20 on the surface of the reflective portion 22. Furthermore, the planarization layer 23 or 24 can improve the adhesion between the reflective portion 22 and the liquid crystal lens 21 and the display panel 20, which is more advantageous for the structural stability of the display device.
Alternatively, the material of the planarization layer 23 and the planarization layer 24 is silicon dioxide or the like. Of course, the invention is not limited thereto, and in other embodiments, the planarization layer may not be provided.
However, whether the reflection part 22 is located on the side of the liquid crystal lens 21 close to the display panel 20 or on the side of the display panel 20 close to the liquid crystal lens 21, the reflection part 22 should not affect the display of the display panel 20 as much as possible. Based on this, the projection of the reflection part 22 on the display panel 20 may be located in the gap between the pixels of the display panel 20.
As shown in fig. 7 and 8, fig. 7 is a schematic top view structure diagram of a display panel according to an embodiment of the present invention, and fig. 8 is a schematic cross-sectional structure diagram of the display panel shown in fig. 7, where the display panel 20 includes a plurality of pixels 201 and a black matrix 202 surrounding the plurality of pixels 201. In the direction perpendicular to the plane of the display panel 20, the reflection portion 22 completely overlaps the black matrix 202, i.e. the projection of the reflection portion 22 on the display panel 20 completely falls within the range of the projection of the black matrix 202 on the display panel 20, so as to avoid the reflection portion 22 from affecting the light emitted by the display panel 20.
Optionally, the display panel 20 shown in fig. 7 is a liquid crystal display panel, as shown in fig. 9, fig. 9 is another schematic top view structure of the display panel provided in the embodiment of the present invention, and the display panel 20 further includes a gate line 203, a data line 204, a gate driving circuit 205, a data driving circuit 206, and the like, which are not described herein again.
Of course, the invention is not limited thereto, and in other embodiments, the display panel 20 may also be an LED display panel, an OLED display panel, or the like. As shown in fig. 10, fig. 10 is a schematic top view structure diagram of another display panel according to an embodiment of the present invention, and the display panel 20 is an OLED display panel and includes a plurality of pixels 201 and a pixel definition layer 203 disposed between the pixels 201. As shown in fig. 10 and fig. 11, fig. 11 is a schematic cross-sectional structural diagram of the display panel shown in fig. 10, in a direction perpendicular to a plane of the display panel 20, the reflection portion 22 completely overlaps the pixel definition layer 203, that is, a projection of the reflection portion 22 on the display panel 20 completely falls within a range of a projection of the pixel definition layer 203 on the display panel 20, so as to prevent the reflection portion 22 from affecting light emission of the display panel 20.
Further, the reflection part 22 in the embodiment of the present invention may be provided corresponding to one or more pixels 201. As shown in fig. 7, the pixels 201 have a first gap L1 extending in the X direction and a second gap L2 extending in the Y direction therebetween, and one reflective portion 22 is located in one gap on the side of one pixel 201, that is, one reflective portion 22 is provided corresponding to one pixel 201. Alternatively, the plurality of reflective portions 22 are uniformly distributed, for example, the reflective portions 22 are located in the second gap L2 on the same side of the pixel 201, for example, on the right side, or the reflective portions 22 are located in the first gap L1 on the same side of the pixel 201, for example, on the lower side, or one reflective portion 22 is located in the second gap L2 on the same side of the pixel 201, for example, on the right side, and one reflective portion 22 is located in the first gap L1 on the same side of the pixel 201, for example, on the lower.
Alternatively, as shown in fig. 10, a plurality of adjacent pixels 201 constitute one unit a, for example, two adjacent pixels 201 constitute one unit a, and the plurality of units a are arranged in an array and have a third gap L3 extending in the X direction and a fourth gap L4 extending in the Y direction. One reflection part 22 is located in one gap on one side of one cell a, or one reflection part 22 is located in one gap in one cell a, that is, one reflection part 22 is provided corresponding to a plurality of pixels 201. Alternatively, the plurality of reflection portions 22 are uniformly distributed, for example, the reflection portions 22 are located in the same gap in one cell a, or the reflection portions 22 are located in the fourth gap L4 on the same side of the cell a, for example, on the right side, or the reflection portions 22 are located in the third gap L3 on the same side of the cell a, for example, on the lower side, or one reflection portion 22 is located in the fourth gap L4 on the same side of the cell a, for example, on the right side, and one reflection portion 22 is located in the third gap L3 on the same side of the cell a, for example, on the lower side.
The smaller the number of pixels 201 corresponding to the reflection portion 22, the larger the number and density of the reflection portions 22 in the entire display device, and the higher the reflectance of the display device. However, if the number and density of the reflection portions 22 are too large and the reflection portions 22 are provided in four gaps, i.e., up, down, left, and right, of each pixel 201, the reflected light from the reflection portions 22 will confuse the display image of the display panel 20, and the display effect of the display panel 20 will be affected. Based on this, the number of pixels 201 corresponding to the reflection portion 22 is optionally 1 or more and 9 or less.
An embodiment of the present invention further provides a driving method of a display device, which is applied to the display device provided in any of the above embodiments, as shown in fig. 12, where fig. 12 is a flowchart of the driving method of the display device provided in the embodiment of the present invention, and the driving method includes:
s101: controlling the liquid crystal lens to be in a working state, and enabling the liquid crystal lens to gather external incident light to the reflecting part to enable the display device to be in a high-reflectivity state;
s102: and controlling the liquid crystal lens to be in a non-working state, wherein the liquid crystal lens does not focus external incident light, and the display device is in a low-reflectivity state.
Referring to fig. 3, when the liquid crystal lens 21 is in the working state, the liquid crystal lens 21 focuses external incident light onto the reflection portion 22, so that most of the incident light of the reflection portion 22 is reflected back to the outside of the display device, so that the display device is in a high-reflectivity state; when the liquid crystal lens 21 is in the non-operating state, the liquid crystal lens 21 does not focus external incident light, the external incident light directly penetrates through the liquid crystal lens 21 and enters the reflection portion 22 and the display panel 20, the reflection portion 22 reflects a small part of the incident light to the outside of the display device, and the light emitted by the display panel 20 penetrates through the liquid crystal lens 21 and exits to the outside of the display device, so that the display device is in a low-reflectivity state and a high-brightness display state.
It should be noted that, referring to fig. 4 and fig. 5, when the driving chip 217 applies a voltage to the first electrode layer 212 and the second electrode layer 213, the liquid crystal lens 21 is in an operating state, and under the action of an electric field between the first electrode layer 212 and the second electrode layer 213, liquid crystal molecules in the liquid crystal layer 214 rotate and change an inclination angle, so that the liquid crystal layer 214 forms a lens-shaped structure 2140 having a birefringent lens effect. Moreover, since the second electrode layer 213 is a strip electrode as shown in fig. 4 or a concentric ring electrode as shown in fig. 5, the liquid crystal layer 214 forms a plurality of lenticular structures 2140 having a birefringent lens effect.
When the driving chip 217 no longer applies a voltage to the first electrode layer 212 and the second electrode layer 213, the liquid crystal lens 21 is in a non-operating state, liquid crystal molecules in the liquid crystal layer 214 do not rotate, and the lenticular structure 2140 is not formed, that is, the liquid crystal molecules in the liquid crystal layer 214 are arranged in parallel, external incident light passes through the liquid crystal lens 21 in parallel, and only a small portion of the light irradiates the reflection portion 22 and is reflected by the reflection portion 22.
Accordingly, when the liquid crystal lens 21 is in the operating state, high reflectance of the display device can be achieved, and when the liquid crystal lens 21 is in the non-operating state, a display state of low reflectance and high luminance of the display device can be achieved, so that the display device can achieve high reflectance and high luminance.
An embodiment of the present invention further provides an electronic rearview mirror, as shown in fig. 13, fig. 13 is a schematic structural diagram of the electronic rearview mirror provided in the embodiment of the present invention, and the electronic rearview mirror includes the display device 1 provided in any one of the embodiments.
The display device and the electronic rearview mirror provided by the invention have the advantages of high reflectivity, high brightness of displayed images and the like, and are more convenient to apply.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (11)
1. A display device, comprising:
the liquid crystal lens is positioned on the light emergent side of the display panel;
the reflecting part is positioned between the display panel and the liquid crystal lens and distributed on a main optical axis of the liquid crystal lens;
when the liquid crystal lens is in a working state, the liquid crystal lens gathers external incident light rays onto the reflecting part, so that the display device is in a high-reflectivity state;
when the liquid crystal lens is in a non-working state, the liquid crystal lens does not focus external incident light, so that the display device is in a low reflectivity and a display state.
2. The display device according to claim 1, wherein the reflection portion is located on a focal plane of the liquid crystal lens.
3. The display device according to claim 1, wherein the display panel includes a plurality of pixels and a black matrix surrounding the plurality of pixels;
in the direction perpendicular to the plane of the display panel, the reflecting part is completely overlapped with the black matrix.
4. The display device according to claim 1, wherein the display panel includes a plurality of pixels and a pixel defining layer between the pixels;
in a direction perpendicular to a plane of the display panel, the reflection part completely overlaps the pixel defining layer.
5. The display device according to claim 3 or 4, wherein the reflection portion is provided in correspondence with one or more of the pixels.
6. The display device according to claim 5, wherein the number of pixels corresponding to the reflection portion is 1 or more and 9 or less.
7. The display device according to claim 1, wherein the reflection portion is located on a side of the liquid crystal lens close to the display panel;
or, the reflection part is positioned on one side of the display panel close to the liquid crystal lens.
8. The display device according to claim 1, wherein a material of the reflective portion includes one or more of a metal and a metal oxide.
9. The display device according to claim 1, wherein the liquid crystal lens comprises a first substrate, a second substrate, a first electrode layer on a side of the first substrate facing the second substrate, a second electrode layer on a side of the second substrate facing the first substrate, and a liquid crystal layer between the first substrate and the second substrate, which are disposed opposite to each other;
the second electrode layer comprises a plurality of strip electrodes or concentric ring electrodes which are arranged in parallel.
10. A method for driving a display device, which is applied to the display device according to any one of claims 1 to 9, comprising:
controlling the liquid crystal lens to be in a working state, wherein the liquid crystal lens gathers external incident light to the reflecting part, so that the display device is in a high-reflectivity state;
and controlling the liquid crystal lens to be in a non-working state, wherein the liquid crystal lens does not focus external incident light, so that the display device is in a low reflectivity and a display state.
11. An electronic rearview mirror comprising the display device according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811145301.8A CN109143671B (en) | 2018-09-29 | 2018-09-29 | Display device, driving method thereof and electronic rearview mirror |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811145301.8A CN109143671B (en) | 2018-09-29 | 2018-09-29 | Display device, driving method thereof and electronic rearview mirror |
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| CN109143671A CN109143671A (en) | 2019-01-04 |
| CN109143671B true CN109143671B (en) | 2021-08-24 |
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| CN201811145301.8A Active CN109143671B (en) | 2018-09-29 | 2018-09-29 | Display device, driving method thereof and electronic rearview mirror |
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| CN111221060B (en) * | 2020-03-11 | 2020-12-25 | 深圳市华星光电半导体显示技术有限公司 | Display panel and device |
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| US3614210A (en) * | 1969-11-06 | 1971-10-19 | Rca Corp | Liquid crystal day/night mirror |
| EP0236112A2 (en) * | 1986-03-06 | 1987-09-09 | Taliq Corporation | Mirror |
| CN102037395A (en) * | 2008-05-29 | 2011-04-27 | 索尼公司 | Display device |
| CN103192768A (en) * | 2013-03-29 | 2013-07-10 | 信利半导体有限公司 | Liquid crystal anti-glaring rearview mirror |
| CN104656294A (en) * | 2015-03-03 | 2015-05-27 | 京东方科技集团股份有限公司 | Rearview mirror |
| CN107089182A (en) * | 2017-03-23 | 2017-08-25 | 京东方科技集团股份有限公司 | Lighting control system and the vehicles |
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|---|---|---|---|---|
| US3614210A (en) * | 1969-11-06 | 1971-10-19 | Rca Corp | Liquid crystal day/night mirror |
| EP0236112A2 (en) * | 1986-03-06 | 1987-09-09 | Taliq Corporation | Mirror |
| CN102037395A (en) * | 2008-05-29 | 2011-04-27 | 索尼公司 | Display device |
| CN103192768A (en) * | 2013-03-29 | 2013-07-10 | 信利半导体有限公司 | Liquid crystal anti-glaring rearview mirror |
| CN104656294A (en) * | 2015-03-03 | 2015-05-27 | 京东方科技集团股份有限公司 | Rearview mirror |
| CN107089182A (en) * | 2017-03-23 | 2017-08-25 | 京东方科技集团股份有限公司 | Lighting control system and the vehicles |
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| CN109143671A (en) | 2019-01-04 |
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