CN115509046B - Backlight module, display panel, control method of display panel and display device - Google Patents
Backlight module, display panel, control method of display panel and display device Download PDFInfo
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- CN115509046B CN115509046B CN202211201636.3A CN202211201636A CN115509046B CN 115509046 B CN115509046 B CN 115509046B CN 202211201636 A CN202211201636 A CN 202211201636A CN 115509046 B CN115509046 B CN 115509046B
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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
- G02F1/133605—Direct backlight including specially adapted 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
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- 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
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The application provides a backlight module, a display panel, a control method of the display panel and a display device. The backlight module comprises a substrate, a reflecting layer and a light source, wherein the reflecting layer is arranged on the substrate, the reflecting layer comprises a plurality of reflecting areas, the reflecting areas are provided with dimming structures, the dimming structures comprise reflecting surfaces deviating from the substrate, the reflecting surfaces are movably connected to the substrate, and a first included angle between the reflecting surfaces and the substrate is adjustable; the light source is arranged on one side of the reflecting layer, which is away from the substrate, and the light source is configured to emit light towards the reflecting surface. According to the embodiment of the application, the backlight module can be switched between the peep-proof mode and the normal display mode.
Description
Technical Field
The application relates to the technical field of display, in particular to a backlight module, a display panel, a control method of the display panel and a display device.
Background
At present, the frequency of using the display device in an open space or a public place is very high, and along with the continuous improvement of the demands of users for privacy security protection, the display device is generally required to be subjected to peep-proof design so as to ensure the privacy security of the users.
The existing display device realizes the peep-proof function by arranging the peep-proof film on the display panel. Generally, the peep-proof film is arranged on one side of the display surface of the display panel, and the peep-proof film adopts a shutter principle and has the property of limiting light to exit the display panel from a fixed angle, so that the peep-proof angle of the display panel provided with the peep-proof film is fixed and not adjustable, and light rays exiting from the front view angle of the display panel can be shielded, and the display brightness of the front view angle of the display panel can be sacrificed due to the arrangement of the peep-proof film, so that the display effect of the display panel is influenced. In view of this, there is a need for improving the peep-proof function of the display panel.
Disclosure of Invention
In view of the above, the present application provides a backlight module, a display panel, a control method thereof, and a display device, which can switch the backlight module between a peep-proof mode and a normal display mode.
In a first aspect, an embodiment of the present application provides a backlight module, where the backlight module includes a substrate, a reflective layer and a light source, the reflective layer is disposed on the substrate, the reflective layer includes a plurality of reflective regions, the reflective regions are provided with a dimming structure, the dimming structure includes a reflective surface facing away from the substrate, the reflective surface is movably connected to the substrate, and a first included angle between the reflective surface and the substrate is adjustable; the light source is arranged on one side of the reflecting layer, which is away from the substrate, and the light source is configured to emit light towards the reflecting surface.
In a second aspect, an embodiment of the present application provides a display panel, where the display panel includes an array substrate and the backlight module provided by the embodiment of the first aspect, and the array substrate includes a substrate and a driving device layer disposed on one side of the substrate; the light source is arranged on one side of the substrate, which is away from the driving device layer.
In a third aspect, an embodiment of the present application provides a control method of a display panel, where the display panel is any one of the display panels of the second aspect, and the control method includes:
acquiring a state to be displayed of a display panel;
controlling the angle of view of each reflection area according to the state to be displayed of the display panel;
When the state to be displayed is a first display state, controlling the reflecting surfaces in the reflecting areas to be in a first preset state so that the reflecting areas have a first field angle;
When the state to be displayed is a second display state, controlling the reflecting surfaces in the reflecting areas to be in a second preset state so as to enable the reflecting areas to have a second field angle; wherein the first angle of view is less than the second angle of view.
In a fourth aspect, an embodiment of the present application provides a display device, including the display panel provided in the embodiment of the second aspect.
In the backlight module provided by the embodiment of the application, the backlight module comprises a substrate, a reflecting layer and a light source. The reflection layer is arranged on the substrate, the reflection layer comprises a plurality of reflection areas, the reflection areas are provided with dimming structures, the dimming structures comprise reflection surfaces deviating from the substrate, the reflection surfaces are movably connected to the substrate, and the first included angle between the reflection surfaces and the substrate is adjustable. The light source is arranged on one side of the reflecting layer, which is away from the substrate, and the light source is configured to emit light towards the reflecting surface. The first included angle between the reflecting surface and the substrate is adjusted, so that the light reflection path of the reflecting surface can be changed, the reflecting area has different light-emitting field angles, and the backlight module has different light-emitting field angles. When the light-emitting field angle of the backlight module is smaller, the backlight module is in a peep-proof mode; when the light-emitting field angle of the backlight module is larger, the backlight module is in a normal display mode. Therefore, the backlight module can be switched between the peep-proof mode and the normal display mode through the dimming structure.
The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
fig. 1 is a schematic structural diagram of a backlight module according to some embodiments of the present application;
fig. 2 is a schematic structural diagram of another backlight module according to some embodiments of the present application;
Fig. 3 is a schematic top view of a backlight module according to some embodiments of the present application;
fig. 4 is a schematic structural diagram of a backlight module in a first mode according to some embodiments of the present application;
Fig. 5 is a schematic view of a light reflection partial structure of a reflection area of a backlight module in a first mode according to some embodiments of the present application;
Fig. 6 is a schematic structural diagram of a backlight module in a second mode according to some embodiments of the present application;
Fig. 7 is a schematic view of a light reflection partial structure of a reflection area of a backlight module in a second mode according to some embodiments of the present application;
Fig. 8 is a schematic structural diagram of another backlight module in a first mode according to some embodiments of the present application;
FIG. 9 is a schematic view of a light reflection partial structure of a reflection area of a backlight module in a first mode according to some embodiments of the present application;
fig. 10 is a schematic structural diagram of another backlight module in a second mode according to some embodiments of the present application;
FIG. 11 is a schematic view of a light reflection partial structure of a reflection area of a backlight module in a second mode according to some embodiments of the present application;
Fig. 12 is a schematic structural diagram of a backlight module according to another embodiment of the application;
FIG. 13 is a schematic diagram of a display panel according to some embodiments of the present application;
Fig. 14 is a flowchart illustrating a control method of a display panel according to some embodiments of the present application;
fig. 15 is a schematic structural diagram of a display device according to some embodiments of the present application.
Reference numerals in the specific embodiments are as follows:
10. A substrate; 20. a reflective layer; 21. a reflection region; 22. a dimming structure; 221. a reflecting surface; 222. a driving part; 30. a light source; 40. a light guide layer; 50. a color control layer; 100. an array substrate; 110. a substrate; 120. a driving device layer; x, a first ray; a. a first included angle; b. a second included angle; c. a third included angle; 1000. a display device.
Detailed Description
Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.
It should be noted that unless otherwise indicated, technical or scientific terms used in the embodiments of the present application should be given the ordinary meanings as understood by those skilled in the art to which the embodiments of the present application belong.
In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.
Furthermore, the technical terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.
In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.
In the description of embodiments of the application, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
At present, the frequency of using the display device in an open space or a public place is very high, and along with the continuous improvement of the demands of users for privacy security protection, the display device is generally required to be subjected to peep-proof design so as to ensure the privacy security of the users.
The inventor of the present application has noted that the conventional display device realizes the peep-proof function by providing the peep-proof film on the display panel. The peep-proof film is generally arranged on one side of the display surface of the display panel, and adopts a shutter principle, so that the peep-proof film has the property of limiting light to exit the display panel from a fixed angle. Therefore, the peep-proof angle of the display panel provided with the peep-proof film is fixed and cannot be adjusted. Therefore, the light-emitting field angle of the display panel is also fixed, and the arrangement of the peep-proof film enables the display brightness of the front view angle and the inclined view angle of the display panel to be different and not adjustable, so that the visual experience of a user is affected. On the other hand, the peep-proof film is arranged on the display surface side of the display panel, so that part of light rays emitted from the front viewing angle of the display panel are shielded, and the display brightness of the front viewing angle of the display panel is sacrificed by the peep-proof film, so that the display effect of the display panel is affected.
The inventor of the application researches and discovers that a dimming structure can be arranged in the backlight module, the dimming structure comprises a reflecting surface, and the dimming structure can control the size of the emergent view angle of the backlight module by adjusting the size of an included angle between the reflecting surface and the substrate. When the light-emitting field angle of the backlight module is smaller, the backlight module is in a peep-proof mode; when the light-emitting field angle of the backlight module is larger, the backlight module is in a normal display mode. The backlight module can be switched between the peep-proof mode and the normal display mode through the dimming structure.
In order to solve the problems in the prior art, the embodiment of the application provides a backlight module, a display panel, a control method of the display panel and a display device. The following first describes a backlight module provided by an embodiment of the present application. Fig. 1 is a schematic structural diagram of a backlight module according to some embodiments of the present application, fig. 2 is a schematic structural diagram of another backlight module according to some embodiments of the present application, and fig. 3 is a schematic top view of a backlight module according to some embodiments of the present application.
As shown in fig. 1 to 3, the backlight module comprises a substrate 10, a reflective layer 20 and a light source 30, the reflective layer 20 is disposed on the substrate 10, the reflective layer 20 comprises a plurality of reflective regions 21, the reflective regions 21 are provided with a dimming structure 22, the dimming structure 22 comprises a reflective surface 221 facing away from the substrate 10, the reflective surface 221 is movably connected to the substrate 10, and a first included angle a between the reflective surface 221 and the substrate 10 is adjustable; the light source 30 is disposed on a side of the reflective layer 20 facing away from the substrate 10, and the light source 30 is configured to emit light toward the reflective surface 221.
Alternatively, the reflective layer 20 is divided into a plurality of reflective regions 21 distributed adjacently, and the plurality of reflective regions 21 may be disposed in an array, and the shape of the reflective regions 21 may be, but is not limited to, square, rectangular, or triangular.
The dimming structures 22 are provided in each of the reflection regions 21, and the number of dimming structures 22 in each of the reflection regions 21 may be, but is not limited to, one, two, or more. Alternatively, when the number of dimming structures 22 in each reflection area 21 is plural, the plurality of dimming structures 22 are distributed in an array.
The dimming structure 22 includes a reflective surface 221, and the reflective surface 221 can reflect light emitted by the light source 30. The reflective surface 221 is disposed away from the substrate 10, and it is understood that a side surface of the reflective surface 221 capable of reflecting light is opposite to the substrate 10. The reflective surface 221 is movably connected to the substrate 10, and a first angle a between the reflective surface 221 and the substrate 10 is adjustable. In the embodiment of the present application, by adjusting the first angle a between the reflecting surface 221 and the substrate 10, the light reflection path of the reflecting surface 221 can be changed, so that the reflecting area 21 has different light-emitting angles.
The light source 30 in the embodiment of the present application may be, but is not limited to, a Mini light emitting Diode (MINI LIGHT EMITTING Diode), a Micro LIGHT EMITTING Diode (Micro LED), an Organic LIGHT EMITTING Diode (OLED), or the like. The light source 30 is disposed on a side of the reflective layer 20 facing away from the substrate 10, and is configured to emit light toward the reflective surface 221, and the light is reflected by the reflective surface 221 and then emitted out of the backlight module.
Alternatively, the number of the light sources 30 may be plural, and the light sources 30 are disposed in one-to-one correspondence with the reflection areas 21. And, in a direction perpendicular to the substrate 10, the orthographic projection of the light source 30 on the reflective layer 20 is located at the geometric center of the reflective area 21. The light emitted from the light source 30 can be uniformly distributed to the reflecting surface 221 in the reflecting area 21.
In the above technical solution, by adjusting the first angle a between the reflecting surface 221 and the substrate 10, the light reflection path of the reflecting surface 221 can be changed, so that the reflecting area 21 has different light-emitting angles, and the backlight module can have different light-emitting angles. When the light-emitting field angle of the backlight module is smaller, the backlight module is in a peep-proof mode; when the light-emitting field angle of the backlight module is larger, the backlight module is in a normal display mode. Thus, the backlight module can be switched between the peep-proof mode and the normal display mode by the dimming structure 22.
In some embodiments, the dimming structure 22 further includes a driving component 222, and the driving component 222 is connected to the reflective surface 221.
Alternatively, the driving part 222 can drive the reflective surface 221 to rotate so as to adjust the first angle a between the reflective surface 221 and the substrate 10. In the dimming structure 22 provided in the embodiment of the present application, the number of the driving components 222 and the reflecting surfaces 221 may have various corresponding relationships, for example, one driving component 222 may be disposed corresponding to one reflecting surface 221, or one driving component 222 may be disposed corresponding to a plurality of reflecting surfaces 221. The driving part 222 is fixedly connected with the substrate, the reflecting surface 221 is connected to the driving part 222, and the driving part 222 can receive an electric signal to drive the reflecting surface 221 to rotate.
Alternatively, the dimming structure 22 provided by an embodiment of the present application may be a digital micromirror device (Digtial Micromirror Devices, DMD). When the dimming structure 22 is a digital micromirror device, the first angle a between the reflective surface 221 of the dimming structure 22 and the substrate 10 is between 0 and 12 degrees. Illustratively, the first angle a between the reflective surface 221 and the substrate 10 may be 0 degrees, 10 degrees, or 12 degrees.
The digital micro-mirror device mainly comprises a reflecting mirror plate, a torsion arm beam, a hinge, an addressing electrode, a bias electrode, a static memory and the like. The reflector plate is connected with the torsion arm beam, the torsion arm beam is suspended on the two hinge support columns through the hinge, and the reflector plate can rotate around the hinge shaft. The hinge support posts are connected to bias electrodes that can provide a bias voltage to each mirror plate. Each mirror plate has two conductive channels. The addressing electrode of the torsion beam and the addressing electrode of the mirror plate are connected to the underlying static memory.
Each mirror plate is an independent body and can be turned over at different angles, so that the light reflected by the mirror plate can present different angles. When the digital micromirror device works, bias voltage (0 or 1) is applied to the reflecting mirror plate, so that an electrostatic field is formed between the reflecting mirror plate and the addressing electrode of the reflecting mirror plate, between the torsion arm beam and the addressing electrode of the torsion arm beam, and an electrostatic moment is generated, so that the reflecting mirror plate rotates around the torsion arm beam, and a corresponding deflection angle is achieved. Each mirror plate has three stable states: +12 degrees or +10 degrees, 0 °, -12 degrees or-10 degrees.
Fig. 4 is a schematic structural view of a backlight module in a first mode according to some embodiments of the present application, fig. 5 is a schematic structural view of a light reflection part of a reflection area of the backlight module in the first mode according to some embodiments of the present application, fig. 6 is a schematic structural view of a backlight module in a second mode according to some embodiments of the present application, and fig. 7 is a schematic structural view of a light reflection part of a reflection area of the backlight module in the second mode according to some embodiments of the present application.
With continued reference to fig. 4 to 7, in some embodiments, the backlight module has a first mode and a second mode, in the first mode, the driving component 222 drives at least part of the reflective surfaces 221 in each reflective region 21 to rotate, so that the second included angle b between at least part of the reflective surfaces 221 in each reflective region 21 and the first ray X is an acute angle, and the first ray X is a ray emitted from the geometric center of the reflective region 21 toward the light source 30 and perpendicular to the reflective layer 20; in the second mode, the driving component 222 drives at least part of the reflecting surfaces 221 in each reflecting area 21 to rotate, so that the third included angle c between at least part of the reflecting surfaces 221 in each reflecting area 21 and the first ray X is an obtuse angle.
As described above, the number of the dimming structures 22 in each reflection region 21 may be plural, and the plurality of dimming structures 22 are distributed in an array. The number of the light sources 30 may be plural, and the light sources 30 are disposed in one-to-one correspondence with the reflection areas 21. And, in a direction perpendicular to the substrate 10, the orthographic projection of the light source 30 on the reflective layer 20 is located at the geometric center of the reflective area 21. In order to more clearly describe the embodiments of the present application, the above-described configuration is described as an example.
Optionally, the first mode is a peep-proof mode, and the second mode is a normal display mode.
When the driving component 222 drives at least part of the reflective surfaces 221 in each reflective area 21 to rotate, a second included angle b is formed between at least part of the reflective surfaces 221 in each reflective area 21 and the first ray X, and the second included angle b is an acute angle, so that the reflective area 21 has a smaller light-emitting angle, and the backlight module also has a smaller light-emitting angle, so that the backlight module is in the peep-preventing mode.
When the driving component 222 drives at least part of the reflective surfaces 221 in each reflective area 21 to rotate, a third included angle c is formed between at least part of the reflective surfaces 221 in each reflective area 21 and the first ray X, and the third included angle c is an obtuse angle, so that the reflective area 21 has a larger light-emitting angle of view, and the backlight module also has a larger light-emitting angle of view, so that the backlight module is in a normal display mode.
Illustratively, the at least part of the reflective surfaces 221 in each reflective area 21 may be located in a plurality of positions, for example, at the edge of the reflective area 21, in an area other than the geometric center of the reflective area 21, or in an entire area of the reflective area 21. The embodiment of the present application does not limit the specific position of at least part of the reflective surface 221 in each reflective area 21, as long as the backlight module can be switched between the first mode and the second mode.
In the above technical solution, by adjusting the included angle between at least part of the reflective surfaces 221 in each reflective area 21 and the first ray X, the light reflection path of the reflective surface 221 can be changed, so that the reflective areas 21 have different light-emitting angles, and further the backlight module can have different light-emitting angles. When the included angle between at least part of the reflecting surfaces 221 in each reflecting area 21 and the first ray X is an acute angle, the reflecting areas 21 can have a smaller light-emitting field angle, and further the backlight module also has a smaller light-emitting field angle, and the backlight module is in the peep-proof mode. When the included angle between at least part of the reflecting surfaces 221 in each reflecting area 21 and the first ray X is an obtuse angle, the reflecting areas 21 can have a larger light-emitting field angle, and the backlight module can have a larger light-emitting field angle, so that the backlight module is in a normal display mode. Therefore, the backlight module can be switched between the peep-proof mode and the normal display mode through the scheme.
Fig. 8 is a schematic structural view of another backlight module in a first mode according to some embodiments of the present application, fig. 9 is a schematic structural view of a light reflection part of a reflection area of another backlight module in a first mode according to some embodiments of the present application, fig. 10 is a schematic structural view of another backlight module in a second mode according to some embodiments of the present application, and fig. 11 is a schematic structural view of a light reflection part of a reflection area of another backlight module in a second mode according to some embodiments of the present application.
With continued reference to fig. 8-11, in some alternative embodiments, in the first mode, the driving component 222 drives the reflective surface 221 of each reflective region 21 near the edge of the reflective region 21 to rotate such that the reflective surface 221 near the edge of the reflective region 21 makes an acute angle with the second included angle b of the first ray X; in the second mode, the driving part 222 drives the reflective surface 221 near the edge of the reflective area 21 in each reflective area 21 to rotate so that the third included angle c between the reflective surface 221 near the edge of the reflective area 21 and the first ray X is an obtuse angle.
As described above, since the light source 30 is disposed corresponding to the geometric center of the reflection area 21, the reflection surface 221 near the edge of the reflection area 21 has a larger influence on the light emission angle size of the reflection area 21 than the reflection surface 221 near the geometric center of the reflection area 21.
Optionally, when the driving component 222 drives the reflective surface 221 near the edge of the reflective area 21 in each reflective area 21 to rotate, so that the reflective surface 221 near the edge of the reflective area 21 and the second angle b of the first ray X are acute angles, the reflective area 21 can have a smaller light-emitting field angle, and thus the backlight module also has a smaller light-emitting field angle, and the peep-proof effect of the backlight module can be further enhanced.
When the driving component 222 drives the reflective surface 221 near the edge of the reflective area 21 in each reflective area 21 to rotate, so that the reflective surface 221 near the edge of the reflective area 21 and the third angle c of the first ray X are obtuse angles, the reflective area 21 can have a larger light-emitting field angle, and the backlight module can also have a larger light-emitting field angle, so that the normal display effect of the backlight module can be further enhanced.
In the above technical solution, by adjusting the included angle between the reflective surface 221 of each reflective area 21 near the edge of the reflective area 21 and the first ray X, the peep preventing effect of the backlight module in the peep preventing mode and the normal display effect of the backlight module in the normal display mode can be further improved.
Fig. 12 is a schematic structural diagram of a backlight module according to another embodiment of the application.
With continued reference to fig. 12, in some embodiments, the backlight module further includes a light guiding layer 40, and the light guiding layer 40 is disposed between the reflective layer 20 and the light source 30.
Illustratively, the light guiding layer 40 can improve the uniformity of the light emitted from the light source 30 to the reflective layer 20, and can also improve the uniformity of the light emitted from the backlight module after being reflected by the reflective layer 20. The light guide layer 40 may be made of a material having transparency and flexibility. As one example, the light guide layer 40 may be made of, but is not limited to, at least one of polycarbonate, polyurethane, polyethylene terephthalate, and polymethyl methacrylate.
In the above technical solution, by providing the light guiding layer 40 between the reflecting layer 20 and the light source 30, the uniformity of the light emitted from the backlight module can be effectively improved.
In some embodiments, the backlight module further includes a color adjusting layer 50, the color adjusting layer 50 is disposed between the reflective layer 20 and the light guiding layer 40, and the color adjusting layer 50 is used for adjusting the color of the light emitted from the light source 30.
Alternatively, the color adjusting layer 50 can convert the light emitted from the light source 30 into white. As described above, the light source 30 may be, but is not limited to, a mini light emitting diode, a micro light emitting diode, an organic light emitting diode, or the like. In the embodiment of the present application, the light source 30 is a mini led.
Illustratively, the color of the light emitted by the mini light emitting diode may be, but is not limited to, blue, red, green, or the like. The color control layer 50 may be disposed in various ways, for example, the color control layer 50 may include a blue color conversion film capable of converting blue light into white light; the color modulation layer 50 may also include a red color conversion film capable of converting red light into white light; the color modulation layer 50 may further include a green color conversion film capable of converting green light into white light. Thus, in the embodiment provided by the present application, the color conversion film in the color adjustment layer 50 can be selected according to the color of the light emitted by the mini led.
In the above technical scheme, by arranging the color regulating layer 50 between the reflective layer 20 and the light guiding layer 40, the light emitted by the light source 30 can be converted into white, so that the color requirement of the light emitted by the backlight module can be met, and the light emitting quality of the backlight module is further improved.
Fig. 13 is a schematic structural diagram of a display panel according to some embodiments of the application.
With continued reference to fig. 13, based on the backlight module provided by the embodiment of the present application, the embodiment of the present application further provides a display panel, where the display panel includes an array substrate 100 and the backlight module provided by any one of the embodiments, and the array substrate 100 includes a substrate 110 and a driving device layer 120 disposed on one side of the substrate 110; the light source 30 is arranged on a side of the substrate 110 facing away from the driving device layer 120.
In the display panel provided by the embodiment of the application, the display panel comprises an array substrate 100 and a backlight module, the array substrate 100 comprises a substrate 110 and a driving device layer 120, and the driving device layer 120 is arranged on one side of the substrate 110. The driving device layer 120 includes a driving circuit for driving the light source 30 to emit light.
The light source 30 in the backlight module is disposed on a side of the substrate 110 facing away from the driving device layer 120, that is, the light source 30 and the driving device layer 120 share one substrate 110, the light source 30 emits light along a direction facing away from the driving device layer 120, and after the light reaches the reflective layer 20, the reflective layer 20 reflects the light along a direction facing toward the driving device layer 120, so as to provide backlight for the display panel.
Optionally, the substrate 110 is transparent, and the substrate 110 may be disposed in various manners, for example, the substrate 110 may be a rigid substrate 110, and the material of the substrate 110 includes a rigid material such as glass. Or the substrate 110 may be a flexible substrate 110, and the material of the substrate 110 includes a flexible material such as polyimide.
In some alternative embodiments, the display panel includes a plurality of pixel units; in the area corresponding to the reflective area 21, the number of pixel units is greater than the number of dimming structures 22.
Illustratively, the display panel provided by the embodiment of the application comprises a plurality of pixel units, wherein the plurality of pixel units are formed on the substrate 110 and are arranged in an array structure, and the light-emitting colors of the plurality of pixel units include, but are not limited to, blue, red, green and the like. In the area corresponding to the reflective area 21, the number of pixel units is greater than the number of dimming structures 22. I.e. the number of orthographic projections of the plurality of pixel units on the reflective layer 20 is smaller than the number of dimming structures 22 in the thickness direction of the display panel.
In the above technical solution, since the light reflected by each dimming structure 22 has a certain area range, the light reflected by each dimming structure 22 can make the pixel units located in the light area range emit light, and each dimming structure 22 can correspondingly meet the light emitting requirements of a plurality of pixel units, so that the number of the pixel units is set to be greater than that of the dimming structures 22, which can avoid the resource waste caused by setting too many dimming structures 22 and reduce the manufacturing cost of the display panel.
Fig. 14 is a flowchart illustrating a control method of a display panel according to some embodiments of the application.
With continued reference to fig. 14, based on the display panel provided by the embodiment of the present application, the embodiment of the present application further provides a control method of a display panel, where the control method of the display panel includes:
Step S01, a state to be displayed of the display panel is obtained.
Step S02, controlling the angle of view of each reflection area according to the state to be displayed of the display panel.
Step S03, when the state to be displayed is the first display state, controlling the reflecting surfaces in the reflecting areas to be in a first preset state so as to enable the reflecting areas to have a first field angle.
Step S04, when the state to be displayed is the second display state, controlling the reflecting surfaces in the reflecting areas to be in a second preset state so as to enable the reflecting areas to have a second field angle.
Wherein the first angle of view is less than the second angle of view.
There are various sequential arrangements of the step S03 and the step S04, for example, the step S03 may be performed before or after the step S04, and the step S03 and the step S04 may be performed simultaneously.
In the control method of the display panel provided by the embodiment of the application, corresponding to different display states, the inclination shape of the reflecting surface in each reflecting area comprises a first preset state and a second preset state. Optionally, when the display state is a first preset state, each reflection area has a first field angle; when the display state is a second preset state, each reflection area has a second field angle. Wherein the first angle of view is less than the second angle of view.
In the process of controlling the display panel, the view angle of each reflection area can be adjusted according to the state to be displayed of the display panel. The to-be-displayed state of the display panel includes a first display state and a second display state. The first display state is, for example, a peep-proof state, and the second display state is, for example, a normal display state.
For example, the driving part of the dimming structure can control the reflecting surface in each reflecting area to be in a first preset state so as to enable each reflecting area to have a first field angle; for another example, the driving part of the dimming structure can control the reflecting surface in each reflecting area to be in a second preset state so that each reflecting area has a second field angle.
When the state to be displayed of the display panel is the peep-proof state, the driving part of the dimming structure can control the reflecting surfaces in the reflecting areas to be in a first preset state, so that each reflecting area has a first view angle, and the first view angle is smaller to enable the backlight module to be in the peep-proof mode, and further enable the display panel to achieve the peep-proof effect; when the to-be-displayed state of the display panel is a normal display state, the driving component of the dimming structure can control the reflecting surfaces in the reflecting areas to be in a second preset state, so that each reflecting area has a second view angle, and the second view angle is larger to enable the backlight module to be in a normal display mode, and further the display panel can display normally.
In the technical scheme, the driving part of the dimming structure controls the reflecting surfaces in the reflecting areas to be in different preset states so as to adjust the angle of view of each reflecting area, so that the display state of the display panel can be switched between the peep-proof state and the normal display state.
In some embodiments, step S02 includes:
Controlling the included angle between at least part of reflecting surfaces in each reflecting area and the first ray as a target included angle, wherein the first ray is a ray which exits from the geometric center of the reflecting area towards the light source and is perpendicular to the reflecting layer; when the state to be displayed is a first display state, the target included angle is an acute angle; and when the state to be displayed is the second display state, the target included angle is an obtuse angle.
As described above, each reflection region in the reflection layer includes a plurality of reflection surfaces, and the plurality of reflection surfaces are distributed in an array. The number of the light sources is multiple, and the light sources are arranged in one-to-one correspondence with the reflection areas. The orthographic projection of the light source on the reflecting layer is positioned at the geometric center of the reflecting area along the direction vertical to the substrate.
The first ray is a ray which exits from the geometric center of the reflection area towards the light source and is perpendicular to the reflection layer.
In some embodiments, the first display state is, for example, a peep-proof state, and the second display state is, for example, a normal display state.
In step S02, according to the state to be displayed of the display panel, the driving component of the dimming structure may control the target included angle between at least part of the reflective surfaces in each reflective region and the first ray to be an acute angle or an obtuse angle. When the target included angle is an acute angle, each reflection area has a smaller field angle so that the backlight module is in a peep-proof mode, and the display panel achieves the peep-proof effect; when the target included angle is an obtuse angle, each reflection area has a larger field angle so that the backlight module is in a normal display mode, and the display panel can display normally.
The positions of at least part of the reflecting surfaces in the reflecting areas can be various, for example, the positions can be located at the edges of the reflecting areas, the positions can be located in areas except the geometric center of the reflecting areas, and the positions can be the whole areas of the reflecting areas. The embodiment of the application does not limit the specific positions of at least part of the reflecting surfaces in each reflecting area, so long as the display panel can be switched between the peep-proof state and the normal display state.
In some alternative embodiments, controlling the included angle between at least part of the reflective surfaces in each reflective region and the first ray to be a target included angle includes:
And controlling the included angle between the reflecting surface, close to the edge of the reflecting area, in each reflecting area and the first ray to be a target included angle.
The light source is disposed corresponding to the geometric center of the reflective area, and the inclination angle of the reflective surface near the edge of the reflective area has a larger influence on the light-emitting field angle of the backlight module than the inclination angle of the reflective surface near the geometric center of the reflective area. Therefore, when the driving part drives the reflecting surface, close to the edge of the reflecting area, in each reflecting area to rotate, so that the included angle between the reflecting surface, close to the edge of the reflecting area, and the first ray is an acute angle, the peep-proof effect of the display panel can be further enhanced; when the driving part drives the reflecting surface, close to the edge of the reflecting area, in each reflecting area to rotate, so that the included angle between the reflecting surface, close to the edge of the reflecting area, and the first ray is an obtuse angle, the normal display effect of the display panel can be further enhanced.
According to the technical scheme, the included angle between the reflecting surface, close to the edge of the reflecting area, in each reflecting area and the first ray is adjusted through the dimming structure, so that the size of the emergent view angle of the display panel is controlled, and the peeping prevention effect and the normal display effect of the display panel can be further enhanced.
Fig. 15 is a schematic structural diagram of a display device according to some embodiments of the present application.
With continued reference to fig. 15, based on the display panel provided by the above embodiment of the present application, the embodiment of the present application further provides a display device 1000, where the display device 1000 includes the display panel provided by any one of the above embodiments.
Since the display device 1000 provided in the embodiment of the present application includes the display panel of any one of the embodiments, the display device 1000 provided in the embodiment of the present application has the beneficial effects of the display panel of any one of the embodiments, and is not described herein.
The display device 1000 in the embodiment of the application includes, but is not limited to, a mobile phone, a Personal digital assistant (Personal DIGITAL ASSISTANT, PDA), a tablet computer, an electronic book, a television, an access control, a smart phone, a console, and other devices with display functions.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (8)
1. A backlight module, comprising:
a substrate;
The reflecting layer is arranged on the substrate and comprises a plurality of reflecting areas, the reflecting areas are provided with a plurality of dimming structures, the dimming structures comprise reflecting surfaces deviating from the substrate, the reflecting surfaces are movably connected with the substrate, and a first included angle between the reflecting surfaces and the substrate is adjustable;
a light source disposed on a side of the reflective layer facing away from the substrate, the light source configured to emit light toward the reflective surface;
The light modulation structure further comprises a driving component, and the driving component is connected to the reflecting surface;
Wherein, the backlight module has a peep-proof mode and a normal display mode,
In the peep-proof mode, the driving part drives the reflecting surfaces, close to the edges of the reflecting areas, in each reflecting area to rotate so that a second included angle between the reflecting surfaces, close to the edges of the reflecting areas, and a first ray is an acute angle, and the first ray is a ray which exits from the geometric center of the reflecting area towards the light source and is perpendicular to the reflecting layer;
In the normal display mode, the driving part drives the reflecting surface, close to the edge of the reflecting area, in each reflecting area to rotate so that a third included angle between the reflecting surface, close to the edge of the reflecting area, and the first ray is an obtuse angle;
the number of the light sources is a plurality, the light sources are arranged in one-to-one correspondence with the reflecting areas, and the orthographic projection of the light sources on the reflecting layer is positioned at the geometric center of the reflecting areas along the direction perpendicular to the substrate.
2. A backlight module according to claim 1, wherein the angle between the reflecting surface and the substrate is between 0 and 12 degrees.
3. A backlight module according to claim 1, further comprising a light guiding layer disposed between the reflective layer and the light source.
4. A backlight module according to claim 3, further comprising a color control layer disposed between the reflective layer and the light guide layer, wherein the color control layer is configured to control the color of the light emitted by the light source.
5. A display panel, comprising:
The array substrate comprises a substrate and a driving device layer arranged on one side of the substrate;
and a backlight module according to any one of claims 1-4, wherein the light source is arranged on a side of the substrate facing away from the driving device layer.
6. The display panel of claim 5, wherein the display panel comprises a plurality of pixel cells;
and in the area corresponding to the reflection area, the number of the pixel units is larger than that of the dimming structures.
7. A control method of a display panel for controlling the display panel according to claim 5 or 6, the control method comprising:
acquiring a state to be displayed of the display panel;
Controlling the angle of view of each reflection area according to the state to be displayed of the display panel;
when the state to be displayed is an anti-peeping state, controlling the reflecting surfaces in the reflecting areas to be in a first preset state so that the reflecting areas have a first field angle;
When the state to be displayed is a normal display state, controlling the reflecting surfaces in the reflecting areas to be in a second preset state so as to enable the reflecting areas to have a second field angle;
The first field of view is less than the second field of view;
Wherein, according to the state to be displayed of the display panel, the controlling the angle of view of each reflection area includes:
controlling the included angle between at least part of the reflecting surfaces in each reflecting area and a first ray to be a target included angle, wherein the first ray is a ray which exits from the geometric center of the reflecting area towards a light source and is perpendicular to the reflecting layer;
When the state to be displayed is an anti-peeping state, the target included angle is an acute angle;
when the state to be displayed is a normal display state, the target included angle is an obtuse angle;
wherein said controlling an angle between at least a portion of said reflective surfaces in each of said reflective regions and a first ray comprises:
And controlling the included angle between the reflecting surface, close to the edge of the reflecting area, in each reflecting area and the first ray to be a target included angle.
8. A display device comprising the display panel according to claim 5 or 6.
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| CN101424768A (en) * | 2007-11-02 | 2009-05-06 | 北京京东方光电科技有限公司 | Light guide board, back light source and LCD |
| CN107703654B (en) * | 2017-10-23 | 2020-07-28 | 京东方科技集团股份有限公司 | Peep-proof device, peep-proof display and control method |
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| WO2020154318A1 (en) * | 2019-01-25 | 2020-07-30 | Leia Inc. | Multi-directional backlight, multi-user multiview display, and method |
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| CN107144916A (en) * | 2017-07-10 | 2017-09-08 | 京东方科技集团股份有限公司 | A kind of backlight module and its control method, display device |
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