CN113556532A - Display device - Google Patents
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- CN113556532A CN113556532A CN202110817954.1A CN202110817954A CN113556532A CN 113556532 A CN113556532 A CN 113556532A CN 202110817954 A CN202110817954 A CN 202110817954A CN 113556532 A CN113556532 A CN 113556532A
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- guide plate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/30—Image reproducers
- H04N13/356—Image reproducers having separate monoscopic and stereoscopic modes
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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
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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
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
Abstract
The application discloses a display device for improve display device's viewing effect. The display device provided by the embodiment of the application comprises: the backlight module comprises a backlight module, a display panel and a multi-view grating, wherein the display panel is positioned on one side of the backlight module; the display panel comprises a plurality of sub-pixels arranged in an array; the plurality of sub-pixels are arranged along a first direction and a second direction; the multi-view grating is configured to: in a multi-view display mode, light emitted by multiple columns of sub-pixels adjacent to each other in a second direction passes through a multi-view grating to form a plurality of visible areas; different visual areas are not overlapped with each other, and the area between the adjacent different visual areas is a crosstalk area; the backlight module is provided with a first surface which is contacted with the display panel and a second surface which is arranged opposite to the first surface; the included angle between the first surface and the second surface is larger than zero; a first line perpendicular to the second surface and passing through a center of the display panel passes through one of the plurality of visual regions.
Description
Technical Field
The application relates to the technical field of display, in particular to a display device.
Background
The dual-view display can display different images on the same display screen and show the images to different viewers respectively.
In the prior art, a dual-view display includes a left viewing area and a right viewing area, and a viewer in the left viewing area can see pixels and a viewer in the right viewing area can see pixels to input signals of different pictures, so that a dual-view effect is achieved. But a crosstalk zone is also included between the left visual zone and the right visual zone, and a viewer in the crosstalk zone cannot see a clear picture. The crosstalk zone is located in the central area of the display, and the brightness of the viewing angle of the zone is high, which seriously affects the viewing effect.
Disclosure of Invention
The embodiment of the application provides a display device, which is used for improving the watching effect of the display device.
An embodiment of the present application provides a display device, display device includes: the backlight module comprises a backlight module, a display panel and a multi-view grating, wherein the display panel is positioned on one side of the backlight module;
the display panel comprises a plurality of sub-pixels arranged in an array; the plurality of sub-pixels are arranged along a first direction and a second direction; the first direction and the second direction are crossed;
the multi-view grating is configured to: in a multi-view display mode, light emitted by multiple columns of sub-pixels adjacent to each other in a second direction passes through a multi-view grating to form a plurality of visible areas; different visual areas are not overlapped with each other, and the area between the adjacent different visual areas is a crosstalk area;
the backlight module is provided with a first surface which is contacted with the display panel and a second surface which is arranged opposite to the first surface; the included angle between the first surface and the second surface is larger than zero;
a first line perpendicular to the second surface and passing through a center of the display panel passes through one of the plurality of visual regions.
In some embodiments, the plurality of viewable areas includes: a first visual region and a second visual region; the crosstalk zone between the first visual zone and the second visual zone is a first crosstalk zone;
the first line passes through the first viewing zone.
In some embodiments, the display device further comprises: the bonding glue is positioned between the multi-view grating and the display panel;
an included angle alpha 1 between a boundary between the first visual area and the first interference area and the first surface, an included angle beta 1 between a boundary of one side of the first visual area, which is far away from the second visual area, and the first surface, a width m between adjacent sub-pixels in the second direction, a width p of a sub-pixel light-transmitting area in the second direction, a width a of a multi-view grating light-transmitting area in the second direction, and a refractive index n of the adhesive satisfy the following conditions:
in some embodiments, the distance h between the multi-view grating and the display panel satisfies:
in some embodiments, the angle between the first line of sight and first tamper zone boundaries is greater than or equal to 25 °, and the angle between the first line of sight and first tamper zone boundaries is less than or equal to 40 °.
In some embodiments, an angle α 1 between a boundary between the first visual region and the first tamper region and the first surface, and an angle θ 1 between the first surface and the second surface satisfy the following condition:
25 degrees is less than or equal to 90 degrees to alpha 1 plus theta 1, and 2 times (90 degrees to alpha 1 plus theta 1) is less than or equal to 40 degrees.
In some embodiments, a backlight module includes: the backlight module comprises a supporting frame, a reflecting sheet, a first light guide plate, an inverse prism, a second light guide plate, a first light source and a second light source, wherein the reflecting sheet, the first light guide plate, the inverse prism and the second light guide plate are stacked in an area surrounded by the supporting frame;
the surface of the support frame contacting the display panel is a first surface.
In some embodiments, the plane of the reflective sheet, the plane of the first light guide plate, the plane of the inverse prism, and the plane of the second light guide plate are parallel to the second surface.
In some embodiments, the surface of the first light guide plate on the side close to the reflector plate and the surface of the second light guide plate on the side close to the inverse prism are provided with sawtooth structures;
the backlight module is configured to: in the peep-proof display mode, when the first light source is turned on and the second light source is turned off, light emitted by the first light source passes through the first light guide plate, the inverse prism, the second light guide plate, the display panel and the multi-view grating to form a third visible region.
In some embodiments, the third visual area has an overlap with the visual area traversed by the first line.
In some embodiments, the third viewable area overlaps the viewable area traversed by the first line.
In some embodiments, the display panel includes a liquid crystal cell.
The display device provided by the embodiment of the application, the contained angle between the first surface that backlight unit and display panel contacted and the second surface is greater than zero, display panel goes out the plain noodles and has inclination for the second surface promptly, thereby can make and pass through first visual area with the perpendicular first straight line in second surface and through display panel's center, make first cross talk district between first visual area and the second visual area be located one side of first straight line, promptly first cross talk district no longer is located display device central zone, can reduce the light-emitting luminance in first cross talk district, reduce the influence of cross talk to the display effect.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed 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 based on these 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 view illustrating a visible region and a crosstalk region of a display device according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a backlight module in 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 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 any inventive step, 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 listed before the word covers the element or item listed after the word and its equivalents, 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 be considered true scale, but are merely intended to schematically illustrate the present disclosure. 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, the display device includes: the display device comprises a backlight module 1, a display panel 2 positioned on one side of the backlight module 1 and a multi-view grating 3 positioned on one side of the display panel 2, which is far away from the backlight module 1;
the display panel comprises a plurality of sub-pixels arranged in an array; the plurality of sub-pixels are arranged along a first direction and a second direction; the first direction and the second direction X intersect;
the multiview grating 3 is configured to: in the multi-view display mode, light emitted by a plurality of columns of sub-pixels 6 adjacent to each other in the second direction X passes through the multi-view grating 3 to form a plurality of visible areas; different visual areas are not overlapped with each other, and the area between the adjacent different visual areas is a crosstalk area;
the backlight module 1 is provided with a first surface 7 contacted with the display panel 2 and a second surface 8 arranged opposite to the first surface 7; the included angle theta 1 between the first surface 7 and the second surface 8 is greater than zero;
a first straight line 9 perpendicular to the second surface 8 and passing through the center of the display panel 2 passes through one of the plurality of visual regions.
The display device provided by the embodiment of the application, the contained angle between the first surface that backlight unit and display panel contacted and the second surface is greater than zero, display panel goes out the plain noodles and has inclination for the second surface promptly, thereby can make and pass through first visual area with the perpendicular first straight line in second surface and through display panel's center, make first cross talk district between first visual area and the second visual area be located one side of first straight line, promptly first cross talk district no longer is located display device central zone, can reduce the light-emitting luminance in first cross talk district, reduce the influence of cross talk to the display effect.
It should be noted that fig. 1 only shows the second direction X, and the first direction may be perpendicular to the second direction X, for example.
It should be noted that each column of sub-pixels extends along the first direction, that is, a plurality of sub-pixels arranged along the first direction constitute a sub-pixel column. Under the multi-view display mode, the display data of different pictures are input by adjacent columns of sub-pixels, and the multi-view effect is realized.
In some embodiments, as shown in FIG. 1, the plurality of visual regions comprises: a first visual region and a second visual region; the crosstalk zone between the first visual zone and the second visual zone is a first crosstalk zone;
a first straight line 9 passes through the first viewing zone.
Namely, the display device provided by the embodiment of the application can realize double-view display. Correspondingly, the multi-view grating is a double-view grating.
In some embodiments, as shown in fig. 1, the multi-view grating 3 includes a plurality of light-transmitting regions 5 extending along the first direction and arranged along the second direction X.
The display device further includes: and the adhesive 4 is positioned between the multi-view grating 3 and the display panel 2. Namely, the multi-view grating 3 is bonded to the display panel 2 through the bonding glue 4.
In a specific implementation, the transparent regions of the multi-view grating extend along a first direction, that is, the extending direction of the transparent regions is parallel to the extending direction of the sub-pixels in a row, so that light from the sub-pixel row can be viewed in the first visual region or the second visual region through one transparent region.
Next, taking the multi-view grating as a dual-view grating as an example, each viewing zone in the multi-view mode is illustrated.
As shown in fig. 2, the side of the first visual area away from the first tamper area further includes a second tamper area, and the side of the second visual area away from the first tamper area further includes a third tamper area.
The included angle between the boundary between the first visual area and the first tamper area and the first surface is alpha 1, the included angle between the boundary of one side, away from the second visual area, of the first visual area and the first surface is beta 1, the width between adjacent sub-pixels in the second direction X is m, the width of a sub-pixel light-transmitting area in the second direction X is p, the width a of a multi-view grating light-transmitting area in the second direction X is a period of a multi-view grating is f, and the distance between the multi-view grating and the display panel is h.
It should be noted that the light-emitting surface of the multi-view grating is parallel to the first surface, that is, as shown in fig. 2, an included angle between the boundary between the first visual region and the first crosstalk region and the light-emitting surface of the multi-view grating is also α 1, and an included angle between the boundary of the first visual region on the side away from the second visual region and the light-emitting surface of the multi-view grating is also β 1.
In fig. 2, included angles between the extending direction of the light emitted from the sub-pixel corresponding to the boundary of the first visible region and the direction perpendicular to the first surface are α 2 and β 2, respectively. An included angle between one of the light rays emitted by the multi-view grating in the second crosstalk area and the light emitting surface of the multi-view grating is gamma 1, and an included angle between the extending direction of the sub-pixel emergent light corresponding to the light ray and the direction vertical to the first surface is gamma 2. In specific implementation, the parameters satisfy the following conditions:
sin(90-α1)＝n sin α2；
sin(90-β1)＝n sin β2；
sin(90-γ1)＝n sin γ2；
in some embodiments, an angle α 1 between a boundary between the first visual region and the first tamper region and the first surface, an angle β 1 between a boundary on a side of the first visual region away from the second visual region and the first surface, a width m between adjacent sub-pixels in the second direction, a width p of the sub-pixel light-transmitting region in the second direction, a width a of the multi-view grating light-transmitting region in the second direction, and a refractive index n of the adhesive satisfy the following conditions:
in some embodiments, the distance h between the multi-view grating and the display panel satisfies:
in specific implementation, according to the requirements of α 1 and β 1, when the width m between adjacent sub-pixels in the second direction and the width p of the transparent region of the sub-pixel in the second direction are constant, the width a of the transparent region of the multi-view grating is determined according to the above formula, and then the distance h between the multi-view grating and the display panel is determined.
In specific implementation, when the multi-view grating is bonded to the display panel through the bonding glue, the distance between the multi-view grating and the display panel is the thickness of the bonding glue.
It should be noted that fig. 2 does not show the backlight module, and fig. 2 exemplifies the angle corresponding relationship between each visible area and the crosstalk area by taking the structure of the display panel and the multi-view grating after being attached without deflection. In specific implementation, when the included angle between the first surface and the second surface is θ 1, that is, the structure of the display panel and the multi-view grating after being attached deflects relative to the second surface, each visible region and each crosstalk region also correspondingly deflect, and the deflection angle is θ 1.
In some embodiments, the angle between the first line of sight and first tamper zone boundaries is greater than or equal to 25 °, and the angle between the first line of sight and first tamper zone boundaries is less than or equal to 40 °.
That is, in the display device provided in the embodiment of the present application, the included angle between the first crosstalk area and the first straight line is in a range of 25 ° to 40 °. The brightness of the light emitted by the backlight module at the visual angle with the included angle between the light and the first straight line in the range of 25-40 degrees is lower, so that the influence of crosstalk on the display effect of the display device can be further reduced.
In some embodiments, when an angle between a boundary of the first visual region and the first tamper region and the first straight line is greater than or equal to 25 °, and an angle between a boundary of the second visual region and the first tamper region and the first straight line is less than or equal to 40 °, an angle α 1 between the boundary of the first visual region and the first tamper region and the first surface, and an angle θ 1 between the first surface and the second surface satisfy the following conditions:
25 degrees is less than or equal to 90 degrees to alpha 1 plus theta 1, and 2 times (90 degrees to alpha 1 plus theta 1) is less than or equal to 40 degrees.
It should be noted that, in specific implementation, the included angle between the first surface and the second surface may be set according to an actually required included angle range between the first crosstalk area and the first straight line.
Next, each viewing angle of the display device provided in the embodiment of the present application is exemplified. When the structure of the double view grating attached to the display panel is not deflected relative to the second surface, the angle corresponding to each viewing zone is as shown in table one:
When the structure of the double view grating attached to the display panel deflects 35 ° relative to the second surface, that is, an included angle between the first surface and the second surface is 35 °, angles corresponding to the viewing zones are as shown in table two:
watch two
In table one and table two, the angles include positive angles and negative angles. The first middle negative angle and the first positive angle are respectively angles on two sides of a straight line which is perpendicular to the light-emitting surface of the display panel and penetrates through the center of the display panel. For example, the positive angle is located on the right side of a straight line perpendicular to the light-emitting surface of the display panel and passing through the center of the display panel, and the negative angle is located on the left side of a straight line perpendicular to the light-emitting surface of the display panel and passing through the center of the display panel. In table two, the negative angle and the positive angle are angles located on two sides of the first straight line respectively. For example, positive angles are located to the right of the first line and negative angles are located to the left of the first line.
In some embodiments, as shown in fig. 3, the backlight module 1 includes: a support frame 10, a reflective sheet 11, a first light guide plate 12, a reverse prism 13, a second light guide plate 14 stacked in an area surrounded by the support frame 10, a first light source 15 positioned at a side of the first light guide plate 12, and a second light source 16 positioned at a side of the second light guide plate 14;
the surface of the support frame 10 that contacts the display panel is the first surface 7.
It should be noted that the first light guide plate, the first light source and the inverse prism can achieve collimation, and the second light guide plate and the second light source can achieve light emission with a large viewing angle. The double light guide plates and the double light sources are matched to realize the switching between collimation and sharing, namely the display device provided by the embodiment of the application can realize multi-view display and also can realize peep-proof display and shared display. That is, the display device provided by the embodiment of the application can be switched among a multi-view display mode, a peep-proof display mode and a shared display mode.
In the specific implementation, when the first light source and the second light source are turned on simultaneously and the odd-column and even-column sub-pixels display the same picture, the display mode is the shared display mode. When the first light source and the second light source are simultaneously turned on and the odd-numbered columns and the even-numbered columns of sub-pixels display different pictures, the dual-view display mode is adopted. When the first light source is turned on and the second light source is turned off, and when the odd-numbered rows and the even-numbered rows of sub-pixels display the same picture, the display mode is an anti-peeping display mode, and the picture can be observed only in a vertical viewing angle.
In some embodiments, the support frame may be, for example, a rubber frame. In a specific implementation, the side surface of the supporting frame includes, for example, a fixing reflection sheet, a first light guide plate, an inverse prism, a second light guide plate, a first light source, and a card slot for a second light source.
In some embodiments, as shown in fig. 3, the plane of the reflective sheet 11, the plane of the first light guide plate 12, the plane of the inverse prism 13, and the plane of the second light guide plate 14 are all parallel to the second surface 8.
That is, the reflector plate, the first light guide plate, the inverse prism and the second light guide plate do not need to be arranged obliquely relative to the second surface, and the bearing surface of the support frame contacting the display panel only needs to have an oblique angle relative to the second surface.
In some embodiments, as shown in fig. 3, the surface of the first light guide plate 12 near the reflective sheet 11 and the surface of the second light guide plate 14 near the inverse prism 13 have a saw-tooth structure.
In some embodiments, the backlight module is configured to: in the peep-proof display mode, when the first light source is turned on and the second light source is turned off, light emitted by the first light source passes through the first light guide plate, the inverse prism, the second light guide plate, the display panel and the multi-view grating to form a third visible region.
In some embodiments, the third visual area has an overlap with the visual area traversed by the first line.
In some embodiments, the third viewable area overlaps the viewable area traversed by the first line.
That is, the viewing area in the peep-proof display mode overlaps with the central viewing area in the multi-view display mode, so that when the display modes are switched, the viewer in the central area of the display device can view the display images in different modes without changing the position.
In some embodiments, when the dual view display mode includes the first view region and the second view region, the third view region overlaps the first view region.
In some embodiments, the display panel includes a liquid crystal cell.
In particular implementations, a liquid crystal cell 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 array substrate comprises driving transistors and pixel electrodes which correspond to the sub-pixels one by one. The counter substrate includes, for example, a black matrix having opening areas corresponding to the sub-pixels one by one, the opening areas being provided with color resists corresponding to the colors of the sub-pixels. The array substrate or the opposite substrate further includes a common electrode.
In some embodiments, the display device may be, for example, an in-vehicle display device. In a specific implementation, the vehicle-mounted display device may be disposed in a passenger driving area, for example, such that a user sitting in passenger driving is in a first visual area of the vehicle-mounted display device, and a user sitting in main driving is in a second visual area. Thus, in the dual view display mode, the user in the main driving and the user in the auxiliary driving can watch different display pictures conveniently.
The display device provided by the embodiment of the application is as follows: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Other essential components of the display device are understood by those skilled in the art, and are not described herein or should not be construed as limiting the present application. The display device can be implemented by referring to the above embodiments of the display panel, and repeated descriptions are omitted.
To sum up, according to the display device provided by the embodiment of the application, an included angle between the first surface and the second surface, where the backlight module and the display panel are in contact with, is greater than zero, that is, the light-emitting surface of the display panel has an inclination angle with respect to the second surface, so that a first straight line perpendicular to the second surface and passing through the center of the display panel can pass through the first visual area, and a first crosstalk zone between the first visual area and the second visual area is located on one side of the first straight line, that is, the first crosstalk zone is no longer located in the central area of the display device, so that the light-emitting brightness of the first crosstalk zone can be reduced, and the influence of crosstalk on the display effect is reduced.
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 (12)
1. A display device, characterized in that the display device comprises: the display device comprises a backlight module, a display panel and a multi-view grating, wherein the display panel is positioned on one side of the backlight module;
the display panel comprises a plurality of sub-pixels arranged in an array; the plurality of sub-pixels are arranged along a first direction and a second direction; the first direction and the second direction intersect;
the multi-view grating is configured to: in a multi-view display mode, enabling light emitted by a plurality of columns of sub-pixels adjacent to each other in a second direction to pass through the multi-view grating to form a plurality of visible areas; different visual regions are not overlapped with each other, and the region between different adjacent visual regions is a crosstalk region;
the backlight module is provided with a first surface which is in contact with the display panel and a second surface which is arranged opposite to the first surface; the included angle between the first surface and the second surface is larger than zero;
a first line perpendicular to the second surface and passing through a center of the display panel passes through one of the visual regions of the plurality of visual regions.
2. The display device of claim 1, wherein the plurality of viewable areas comprise: a first visual region and a second visual region; the tamper zone between the first and second visual zones is a first tamper zone;
the first line passes through the first visible region.
3. The display device according to claim 2, further comprising: the bonding glue is positioned between the multi-view grating and the display panel;
an included angle α 1 between a boundary between the first visual region and the first crosstalk region and the first surface, an included angle β 1 between a boundary on a side of the first visual region away from the second visual region and the first surface, a width m between adjacent sub-pixels in the second direction, a width p of the sub-pixel light-transmitting region in the second direction, a width a of the multi-view grating light-transmitting region in the second direction, and a refractive index n of the adhesive satisfy the following conditions:
4. the display device according to claim 3, wherein a distance h between the multiview grating and the display panel satisfies:
5. the display device according to claim 3, wherein an angle between a boundary of the first visual region and the first tamper region and the first straight line is equal to or greater than 25 °, and an angle between a boundary of the second visual region and the first tamper region and the first straight line is equal to or less than 40 °.
6. The display device according to claim 5, wherein an angle α 1 between a boundary between the first visual region and the first tamper region and the first surface, and an angle θ 1 between the first surface and the second surface satisfy the following conditions:
25 degrees is less than or equal to 90 degrees to alpha 1 plus theta 1, and 2 times (90 degrees to alpha 1 plus theta 1) is less than or equal to 40 degrees.
7. The display device according to any one of claims 1 to 6, wherein the backlight module comprises: the backlight module comprises a supporting frame, a reflecting sheet, a first light guide plate, an inverse prism, a second light guide plate, a first light source and a second light source, wherein the reflecting sheet, the first light guide plate, the inverse prism and the second light guide plate are stacked in an area surrounded by the supporting frame;
the surface of the support frame, which is in contact with the display panel, is the first surface.
8. The display device according to claim 7, wherein a plane of the reflective sheet, a plane of the first light guide plate, a plane of the inverse prism, and a plane of the second light guide plate are parallel to the second surface.
9. The display device according to claim 8, wherein a surface of the first light guide plate on a side close to the reflective sheet and a surface of the second light guide plate on a side close to the inverse prism each have a saw-tooth structure;
the backlight module is configured to: in the peep-proof display mode, when the first light source is turned on and the second light source is turned off, light emitted by the first light source passes through the first light guide plate, the inverse prism, the second light guide plate, the display panel and the multi-view grating to form a third visible region.
10. The display device according to claim 9, wherein the third visual region has an overlap with the visual region through which the first line passes.
11. The display device according to claim 10, wherein the third visual region overlaps the visual region through which the first straight line passes.
12. The display device according to any one of claims 1 to 6 and 8 to 11, wherein the display panel includes a liquid crystal cell.
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| CN202110817954.1A CN113556532A (en) | 2021-07-20 | 2021-07-20 | Display device |
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| CN202110817954.1A CN113556532A (en) | 2021-07-20 | 2021-07-20 | Display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023279224A1 (en) * | 2021-07-05 | 2023-01-12 | 瑞仪光电(苏州)有限公司 | Backlight module and display apparatus |
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