CN111736254B - Display device and preparation method thereof - Google Patents
Display device and preparation method thereof Download PDFInfo
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- CN111736254B CN111736254B CN202010724715.7A CN202010724715A CN111736254B CN 111736254 B CN111736254 B CN 111736254B CN 202010724715 A CN202010724715 A CN 202010724715A CN 111736254 B CN111736254 B CN 111736254B
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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
- G02B6/0056—Means for improving the coupling-out of light from the light guide for producing polarisation effects, e.g. by a surface with polarizing properties or by an additional polarizing elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
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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
- G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
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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
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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
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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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
- G02F1/1336—Illuminating devices
- G02F1/13362—Illuminating devices providing polarized light, e.g. by converting a polarisation component into another one
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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
- G02F1/13363—Birefringent elements, e.g. for optical compensation
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Polarising Elements (AREA)
Abstract
The application discloses a display device and a preparation method thereof, which are used for improving the light utilization rate of the display device. An embodiment of the present application provides a display device, the display device includes: the liquid crystal box comprises a 1/4 wave plate positioned above the liquid crystal box, a light guide structure positioned above the 1/4 wave plate and a light source positioned on the side face of the light guide structure; the light guide structure includes: the light guide plate, the first polarization film positioned on one side of the light guide plate, which is far away from the 1/4 wave plate, and the second polarization film positioned on one side of the light guide plate, which is close to the light source; the surface of the light guide plate on the side away from the 1/4 wave plate comprises an inclined surface, and the distance between the inclined surface and the 1/4 wave plate is gradually reduced along the direction of the light source pointing to the light guide plate; the transmission axes of the first and second polarizing films are perpendicular.
Description
Technical Field
The application relates to the technical field of display, in particular to a display device and a preparation method thereof.
Background
The reflective Liquid Crystal Display (LCD) has a large market potential due to its advantages of low power consumption, high aperture ratio, and the like.
In the total reflection LCD design of taking leading light source, light guide plate and liquid crystal box laminating, the light source setting is in the side of light guide plate, because light incides inside the light guide plate after, because effects such as total reflection and refraction between the material, partial light is direct upwards emergent, and the light quantity that gets into reflective LCD is less, leads to the light utilization ratio low, leads to the display effect not good.
In conclusion, the total reflection LCD display product in the prior art has low light utilization rate and poor display effect.
Disclosure of Invention
The embodiment of the application provides a display device and a preparation method thereof, which are used for improving the light utilization rate of the display device.
An embodiment of the present application provides a display device, the display device includes: the liquid crystal box comprises a 1/4 wave plate positioned on the liquid crystal box, a light guide structure positioned on the 1/4 wave plate, and a light source positioned on the side surface of the light guide structure;
the light guide structure includes: the light guide plate, the first polarization film positioned on one side of the light guide plate, which is far away from the 1/4 wave plate, and the second polarization film positioned on one side of the light guide plate, which is close to the light source;
the surface of the light guide plate on the side away from the 1/4 wave plate comprises an inclined surface, and the distance between the inclined surface and the 1/4 wave plate is gradually reduced along the direction in which the light source points to the light guide plate;
the transmission axes of the first and second polarizing films are perpendicular.
The display device that this application embodiment provided, because the transmission axis of first polarizing film and second polarizing film is perpendicular, thereby can't pass through when the light that the second polarizing film passes through directly arrives first polarizing film, and, the light that can't pass through first polarizing film is reflected, when first time passes through 1/4 wave plate, the polarization direction of light increases 45, get into the liquid crystal cell after being reflected, when once more passing through 1/4 wave plate, the polarization direction of light increases 45 again, thereby can pass through first polarizing film, realize the reflective display. That is, the display panel provided by the embodiment of the application changes the propagation direction of incident light by arranging the first polarizing film and the second polarizing film, and changes the polarization direction of light by the 1/4 wave plate and the liquid crystal cell, so that while realizing reflective display, the direct emergence of the light without passing through the liquid crystal cell after being incident into the light guide plate can be avoided, and the light incident into the light guide plate can enter the liquid crystal cell to the maximum extent, so that the light utilization rate can be improved, and the display effect can be improved.
Optionally, the surface of the light guide plate on the side facing away from the 1/4 wave plate comprises only one inclined surface.
Optionally, the surface of the light guide plate facing away from the 1/4 wave plate comprises a plurality of first surfaces and the inclined surfaces which are alternately connected;
the first surface is parallel to a plane of the display device.
The display device that this application embodiment provided, with the plane parallel's at display device place first surface and inclined surface alternate setting, when utilizing inclined surface to change the propagation direction of incident light, even if need adjust inclined surface's inclination, also can avoid the whole thickness of light guide plate too thick.
Alternatively, the first polarizer film is attached only to the inclined surface.
Optionally, the angle between the first surface and the inclined surface is 45 °.
The display device that this application embodiment provided, the contained angle between first surface and the inclined surface is 45 to the light that is reflected by the inclined surface can be perpendicular to liquid crystal box place plane direction incident liquid crystal box, is reflected the back through the liquid crystal box, can be perpendicular to liquid crystal box place plane direction from light guide structure outgoing, thereby the display device's that this application embodiment provides shows the visual angle very little, can improve display device's peep-proof effect.
The first and second polarizing films are polarizing beam splitters.
Alternatively, the first polarizing film transmits S-direction polarized light, and the second polarizing film transmits P-direction polarized light.
Optionally, a bonding adhesive is further included between the light guide plate and the 1/4 wave plate, and between the 1/4 wave plate and the liquid crystal cell.
Optionally, the liquid crystal cell is a reflective liquid crystal cell.
The embodiment of the application provides a preparation method of a display device, which comprises the following steps:
attaching a second polarizing film to a side surface of the light guide plate, and attaching a first polarizing film to a surface connected to the side surface to form a light guide structure; wherein, the surface of the light guide plate on the side away from the 1/4 wave plate comprises an inclined surface, the distance between the inclined surface and the 1/4 wave plate is gradually reduced along the direction of the light source pointing to the light guide plate, and the transmission axes of the first polarizing film and the second polarizing film are vertical;
a 1/4 wave plate is attached to the liquid crystal box;
the light guide structure is attached to the 1/4 wave plate; wherein the first polarizing film is positioned on the side of the light guide plate, which faces away from the 1/4 wave plate;
a light source is disposed opposite the second polarizing film.
According to the preparation method of the display device provided by the embodiment of the application, because the transmission axes of the first polarizing film and the second polarizing film are vertical, when the light transmitted by the second polarizing film directly reaches the first polarizing film, the light cannot pass through the first polarizing film, and the light which cannot pass through the first polarizing film is reflected, when the light passes through the 1/4 wave plate for the first time, the polarization direction of the light is increased by 45 degrees, the light enters the liquid crystal box to be reflected, and when the light passes through the 1/4 wave plate again, the polarization direction of the light is increased by 45 degrees, so that the reflective display can be realized through the first polarizing film. That is, in the display panel manufacturing method provided in the embodiment of the present application, by providing the first polarizing film and the second polarizing film, the propagation direction of incident light is changed, and the polarization direction of light is changed by the 1/4 wave plate and the liquid crystal cell, so that while reflective display is achieved, direct exit before passing through the liquid crystal cell after being incident into the light guide plate can be avoided, and light incident into the light guide plate can enter the liquid crystal cell to the maximum extent, so that the light utilization rate can be improved, and the display effect can be improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of another display device provided in an embodiment of the present application;
fig. 3 is a schematic diagram of a method for manufacturing a display device according to an embodiment of the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings of the embodiments of the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. And the embodiments and features of the embodiments in the present application may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the application without inventive effort, are within the scope of protection of the application.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. As used in this application, the terms "first," "second," and the like do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item preceding the word comprises the element or item listed after the word and its equivalent, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
It should be noted that the sizes and shapes of the figures in the drawings are not to scale, but are merely for illustrative purposes. And the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.
An embodiment of the present application provides a display device, as shown in fig. 1 to 2, the display device includes: the liquid crystal display device comprises a liquid crystal box 1, a 1/4 wave plate 2 positioned above the liquid crystal box 1, a light guide structure 3 positioned above the 1/4 wave plate 2, and a light source 4 positioned on the side surface of the light guide structure 3;
the light guide structure 3 includes: a light guide plate 5, a first polarization film 6 positioned at one side of the light guide plate 5, which is far away from the 1/4 wave plate 2, and a second polarization film 7 positioned at one side of the light guide plate 5, which is close to the light source 4;
the surface of the light guide plate 5 on the side away from the 1/4 wave plate 2 comprises an inclined surface 8, and the distance between the inclined surface 8 and the 1/4 wave plate 2 is gradually reduced along the direction in which the light source 4 points to the light guide plate 5;
the transmission axes of the first polarizing film 6 and the second polarizing film 7 are perpendicular.
The display device that this application embodiment provided, because the transmission axis of first polarizing film and second polarizing film is perpendicular, thereby can't pass through when the light that the second polarizing film passed through directly arrives first polarizing film, and, the light that can't pass through first polarizing film is reflected, when first time passes through 1/4 wave plate, the polarization direction of light increases 45, get into the liquid crystal cell after being reflected, when passing through 1/4 wave plate again, the polarization direction of light increases 45 again, namely the polarization direction of light changes 90 altogether, thereby can pass through first polarizing film, realize the reflective display. The display panel that this application embodiment provided, through setting up first polarization membrane and second polarization membrane, change the propagation direction of incident light, change the polarization direction of light through 1/4 wave plate and liquid crystal cell to when realizing reflective display, can avoid inciding directly the emergence before passing through the liquid crystal cell after the light guide plate is inside, make the light of inciding to the light guide plate can furthest get into the liquid crystal cell, thereby can improve light utilization and rate, improve display effect.
In a specific implementation, the liquid crystal cell is a reflective liquid crystal cell. Alternatively, as shown in fig. 1-2, the liquid crystal cell 1 includes a reflective layer 11. In particular implementations, the liquid crystal cell further includes: the liquid crystal display panel comprises an array substrate, an opposite substrate and a liquid crystal layer, wherein the array substrate and the opposite substrate are oppositely arranged, and the liquid crystal layer is positioned between the array substrate and the opposite substrate. The reflective layer may be disposed in the array substrate, for example, and of course, the reflective layer may also be disposed on a side of the array substrate away from the liquid crystal layer.
Alternatively, as shown in fig. 1, in the display device provided in the embodiment of the present application, a surface of the light guide plate 5 on a side facing away from the 1/4 wave plate 2 includes only one inclined surface 8.
Namely, the surface of the light guide plate, which is far away from the 1/4 wave plate, is an inclined surface.
Or, alternatively, as shown in fig. 2, in the display device provided in the embodiment of the present application, a surface of the light guide plate 5 facing away from the 1/4 wave plate 2 includes a plurality of first surfaces 9 and the inclined surfaces 8 that are alternately connected;
the first surface 9 is parallel to the plane of the display device.
The display device that this application embodiment provided, with the plane parallel's at display device place first surface and inclined surface alternate setting, when utilizing inclined surface to change the propagation direction of incident light, even if need adjust inclined surface's inclination, also can avoid the whole thickness of light guide plate too thick.
Alternatively, as shown in fig. 2, in the display device provided in the embodiment of the present application, the first polarizing film is attached only to the inclined surface.
Alternatively, as shown in fig. 2, in the display device provided in the embodiment of the present application, an included angle between the first surface and the inclined surface is 45 °.
The display device that this application embodiment provided, the contained angle between first surface and the inclined surface is 45, and the incident angle and the speculum that light reachd the inclined surface are 45 to the light that is reflected by the inclined surface can be perpendicular to liquid crystal box place plane direction incident liquid crystal box, is reflected the back through the liquid crystal box, can be perpendicular to liquid crystal box place plane direction from light-directing structure outgoing, thereby the display device's that this application embodiment provided shows visual angle is very little, can improve display device's peep-proof effect.
Optionally, the first and second Polarizing films are Polarizing Beam Splitters (PBSs).
In particular implementations, the PBS may split unpolarized light into linearly polarized light and may only transmit polarized light in a particular direction. In addition, the light transmission parameter of the PBS is related to the material, the refractive index thereof, and the light incidence angle, so that the transmission axes of the first polarizing film and the second polarizing film can be perpendicular by designing the material of the PBS and the light incidence angle.
Alternatively, the first polarizing film transmits S-direction polarized light, and the second polarizing film transmits P-direction polarized light.
Next, the principle of the display device provided in the embodiment of the present application will be described by taking as an example that the first polarizing film transmits S-direction polarized light and the second polarizing film transmits P-direction polarized light. As shown in fig. 2, the natural light emitted from the light source 4 passes through the second polarizing film 7 and is then converted into P-direction polarized light. After the P-direction polarized light reaches the first polarizing film, the P-direction polarized light cannot pass through and is reflected, after passing through the 1/4 wave plate, the polarization direction is increased by 45 degrees, after entering the liquid crystal box and being reflected, when the P-direction polarized light passes through the 1/4 wave plate again, the polarization direction of the light is increased by 45 degrees again, so that the P-direction polarized light is changed into S-direction polarized light, and the S-direction polarized light can penetrate through the first polarizing film, so that reflective display is realized.
In practical implementation, the first polarizing film may be made to transmit the P-direction polarized light, and the second polarizing film may be made to transmit the S-direction polarized light.
Optionally, as shown in fig. 1 and fig. 2, in the display device provided in the embodiment of the present application, a bonding adhesive 10 is further included between the light guide plate and the 1/4 wave plate, and between the 1/4 wave plate and the liquid crystal cell.
Based on the same inventive concept, an embodiment of the present application further provides a method for manufacturing a display device, as shown in fig. 3, the method includes:
s101, attaching a second polarizing film to the side face of the light guide plate, and attaching a first polarizing film to the surface connected with the side face to form a light guide structure; wherein, the surface of the light guide plate on the side away from the 1/4 wave plate comprises an inclined surface, the distance between the inclined surface and the 1/4 wave plate is gradually reduced along the direction of the light source pointing to the light guide plate, and the transmission axes of the first polarizing film and the second polarizing film are vertical;
s102, attaching a 1/4 wave plate to the liquid crystal box;
s103, attaching the light guide structure on the 1/4 wave plate; wherein the first polarizing film is positioned on the side of the light guide plate, which faces away from the 1/4 wave plate;
and S104, arranging a light source opposite to the second polarizing film.
The embodiment of the application provides a method for preparing a display device, because the transmission axis of first polarizing film and second polarizing film is perpendicular, thereby can't pass through when the light that second polarizing film passes through directly arrives first polarizing film, and, the light that can't pass through first polarizing film is reflected, when first time passes through 1/4 wave plate, the polarization direction of light increases 45, get into the liquid crystal cell after being reflected, when once more passing through 1/4 wave plate, the polarization direction of light increases 45 again, thereby can pass through first polarizing film, realize reflective display. That is, in the display panel manufacturing method provided in the embodiment of the present application, by providing the first polarizing film and the second polarizing film, the propagation direction of incident light is changed, and the polarization direction of light is changed by the 1/4 wave plate and the liquid crystal cell, so that while reflective display is achieved, direct exit before passing through the liquid crystal cell after being incident into the light guide plate can be avoided, and light incident into the light guide plate can enter the liquid crystal cell to the maximum extent, so that the light utilization rate can be improved, and the display effect can be improved.
Optionally, before attaching the first polarizing film to a side surface of the light guide plate and attaching the first polarizing film to a surface connected to the side surface to form the light guide structure, the method further comprises:
forming a plurality of first surfaces and the inclined surfaces alternately connected on the surface of the light guide plate connected with the side surface, wherein the first surfaces are parallel to the plane on which the display device is positioned;
attaching a first polarizing film to a surface connected to the side surface, specifically comprising:
the first polarizing film is attached on the inclined surface.
In summary, according to the display device and the method for manufacturing the same provided by the embodiment of the present application, since the transmission axes of the first polarizing film and the second polarizing film are perpendicular, when the light transmitted by the second polarizing film directly reaches the first polarizing film, the light cannot pass through the first polarizing film, and the light that cannot pass through the first polarizing film is reflected, when the light passes through the 1/4 wave plate for the first time, the polarization direction of the light is increased by 45 °, and after entering the liquid crystal cell and being reflected, when the light passes through the 1/4 wave plate again, the polarization direction of the light is increased by 45 °, so that the reflective display can be realized through the first polarizing film. That is, the display panel provided by the embodiment of the application changes the propagation direction of incident light by arranging the first polarizing film and the second polarizing film, and changes the polarization direction of light by the 1/4 wave plate and the liquid crystal cell, so that while realizing reflective display, the direct emergence of the light without passing through the liquid crystal cell after being incident into the light guide plate can be avoided, and the light incident into the light guide plate can enter the liquid crystal cell to the maximum extent, so that the light utilization rate can be improved, and the display effect can be improved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (9)
1. A display device, characterized in that the display device comprises: the liquid crystal box comprises a 1/4 wave plate positioned on the liquid crystal box, a light guide structure positioned on the 1/4 wave plate, and a light source positioned on the side surface of the light guide structure;
the light guide structure includes: the light guide plate, the first polarization film located on one side of the light guide plate, which is far away from the 1/4 wave plate, and the second polarization film located on one side of the light guide plate, which is close to the light source;
the surface of the light guide plate on the side away from the 1/4 wave plate comprises an inclined surface, and the distance between the inclined surface and the 1/4 wave plate is gradually reduced along the direction of the light source pointing to the light guide plate;
the transmission axes of the first polarizing film and the second polarizing film are vertical;
the first polarizing film is attached only to the inclined surface.
2. The display device according to claim 1, wherein a surface of the light guide plate on a side facing away from the 1/4 wave plate includes only one of the inclined surfaces.
3. The display device according to claim 1, wherein the surface of the light guide plate facing away from the 1/4 wave plate comprises a plurality of first surfaces and the inclined surfaces alternately connected;
the first surface is parallel to a plane of the display device.
4. A display device as claimed in claim 3, characterised in that the angle between the first surface and the inclined surface is 45 °.
5. The display device according to claim 1, wherein the first polarizing film and the second polarizing film are polarizing beam splitting prisms.
6. The display device according to claim 1, wherein the first polarizing film transmits S-direction polarized light, and the second polarizing film transmits P-direction polarized light.
7. The display device according to claim 1, further comprising adhesive between the light guide plate and the 1/4 wave plate and between the 1/4 wave plate and the liquid crystal cell.
8. A display device as claimed in claim 1, characterised in that the liquid crystal cell is a reflective liquid crystal cell.
9. A method of manufacturing a display device, the method comprising:
attaching a second polarizing film to a side surface of the light guide plate, and attaching a first polarizing film to a surface connected to the side surface to form a light guide structure;
attaching a 1/4 wave plate on the liquid crystal box;
attaching the light guide structure on the 1/4 wave plate; wherein the first polarizing film is positioned on the side of the light guide plate, which faces away from the 1/4 wave plate;
a light source disposed opposite the second polarizing film;
wherein, the surface of the light guide plate on the side away from the 1/4 wave plate comprises an inclined surface, the distance between the inclined surface and the 1/4 wave plate is gradually reduced along the direction of the light source pointing to the light guide plate, and the transmission axes of the first polarizing film and the second polarizing film are vertical; the first polarizing film is attached only to the inclined surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010724715.7A CN111736254B (en) | 2020-07-24 | 2020-07-24 | Display device and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH11218760A (en) * | 1998-02-02 | 1999-08-10 | Nitto Denko Corp | Polarization plane light source device and liquid crystal display device |
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| EP0867747A3 (en) * | 1997-03-25 | 1999-03-03 | Sony Corporation | Reflective display device |
| JPH11259007A (en) * | 1998-03-10 | 1999-09-24 | Sony Corp | Reflection type display device |
| JP3637555B2 (en) * | 1998-03-26 | 2005-04-13 | 日東電工株式会社 | Light guide plate, surface light source device, and reflective liquid crystal display device |
| CN1280661C (en) * | 2003-03-24 | 2006-10-18 | 友达光电股份有限公司 | Back light module and liquid crystal display device |
| JP4137712B2 (en) * | 2003-06-17 | 2008-08-20 | アルプス電気株式会社 | Surface light emitting device and liquid crystal display device |
| JP5277422B2 (en) * | 2006-06-22 | 2013-08-28 | 国立大学法人東北大学 | Front light for reflective LCD and reflective display device |
| CN104730768B (en) * | 2015-04-09 | 2017-10-27 | 京东方科技集团股份有限公司 | Reflective display and its display methods |
| CN109031787A (en) * | 2018-08-31 | 2018-12-18 | 京东方科技集团股份有限公司 | A kind of front located light source and display device |
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| JPH11218760A (en) * | 1998-02-02 | 1999-08-10 | Nitto Denko Corp | Polarization plane light source device and liquid crystal display device |
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