CN115509046A

CN115509046A - Backlight module, display panel, control method of display panel and display device

Info

Publication number: CN115509046A
Application number: CN202211201636.3A
Authority: CN
Inventors: 梁志兴; 林文鹏; 钟彩娇
Original assignee: Xiamen Tianma Microelectronics Co Ltd
Current assignee: Xiamen Tianma Microelectronics Co Ltd
Priority date: 2022-09-29
Filing date: 2022-09-29
Publication date: 2022-12-23

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 and comprises a plurality of reflecting areas, the reflecting areas are provided with dimming structures, each dimming structure comprises a reflecting surface deviating from the substrate, the reflecting surfaces are movably connected to the substrate, and a first included angle between each reflecting surface and the substrate is adjustable; the light source is arranged on one side of the reflecting layer, which faces 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

Backlight module, display panel, control method of display panel and display device

Technical Field

The present disclosure relates to the field of display technologies, and in particular, to a backlight module, a display panel, a control method thereof, and a display device.

Background

At present, the frequency of the use of the display device in an open space or a public place is very high, and the privacy security protection requirement of a user is continuously improved, so that the display device generally needs to be designed to prevent peeping so as to ensure the privacy security of the user.

The existing display device realizes the peep-proof function by arranging the peep-proof film on the display panel. Generally, a peep-proof film is arranged on one side of a display surface of a display panel, the peep-proof film adopts a shutter principle and has the property of limiting light to be emitted out of 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 cannot be adjusted, and part of light emitted out of a front view angle of the display panel can be shielded, so that the display brightness of the front view angle of the display panel can be sacrificed due to the arrangement of the peep-proof film, and the display effect of the display panel is further influenced. In view of the above, there is a need to improve the peep-proof function of the display panel.

Disclosure of Invention

In view of the foregoing problems, 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 privacy mode and a normal display mode.

In a first aspect, an embodiment of the present application provides a backlight module, which includes a substrate, a reflective layer and a light source, wherein the reflective layer is disposed on the substrate, the reflective layer includes a plurality of reflective regions, the reflective regions are provided with a light modulation structure, the light modulation structure includes a reflective surface 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 faces 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 in the embodiment of the first aspect, where 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 far away from the driving device layer.

In a third aspect, an embodiment of the present application provides a method for controlling a display panel, where the display panel is the display panel in any one of the embodiments of the second aspect, and the method includes:

acquiring a state to be displayed of a display panel;

controlling the field angle of each reflecting 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 surface in each reflecting area to be in a first preset state so that each reflecting area has a first viewing angle;

when the state to be displayed is a second display state, controlling the reflecting surface in each reflecting area to be in a second preset state so that each reflecting area has a second angle of view; 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, which includes 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 stratum sets up in the basement, and the reflection stratum includes a plurality of reflection districts, and the reflection district is provided with the structure of adjusting luminance, adjusts luminance the structure including deviating from the plane of reflection of basement, plane of reflection swing joint in basement, and the plane of reflection is adjustable with the first contained angle of basement. The light source is arranged on one side of the reflecting layer, which faces away from the substrate, and the light source is configured to emit light towards the reflecting surface. The light reflection path of the reflecting surface can be changed by adjusting the first included angle between the reflecting surface and the substrate, so that the reflecting area has different light-emitting visual field angles, and the backlight module can have different light-emitting visual field angles. When the light-emitting angle of view of the backlight module is smaller, the backlight module is in an anti-peeping mode; when the light-emitting angle of view of the backlight module is larger, the backlight module is in a normal display mode. So, can make backlight unit switch between peep-proof mode and normal display mode through above-mentioned structure of adjusting luminance.

The above description is only an overview of the technical solutions of the present application, and the present application may be implemented in accordance with the content of the description so as to make the technical means of the present application more clearly understood, and the detailed description of the present application will be given below in order to make the above and other objects, features, and advantages of the present application more clearly understood.

Drawings

Various additional 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 refer to like parts throughout the drawings. In the drawings:

fig. 1 is a schematic structural diagram of a backlight module according to some embodiments of the present disclosure;

fig. 2 is a schematic structural diagram of another backlight module according to some embodiments of the present disclosure;

fig. 3 is a schematic top view of a backlight module according to some embodiments of the present disclosure;

fig. 4 is a schematic structural diagram of a backlight module in a first mode according to some embodiments of the present disclosure;

fig. 5 is a schematic view of a light reflection partial structure of a reflection region of a backlight module in a first mode according to some embodiments of the present disclosure;

fig. 6 is a schematic structural view of a backlight module in a second mode according to some embodiments of the present disclosure;

fig. 7 is a schematic view of a light reflection partial structure of a reflection region of a backlight module in a second mode according to some embodiments of the present disclosure;

fig. 8 is a schematic structural view of another backlight module in a first mode according to some embodiments of the present disclosure;

fig. 9 is a schematic view of a light reflection partial structure of a reflection region of a backlight module in a first mode according to some embodiments of the present disclosure;

fig. 10 is a schematic structural view of another backlight module in a second mode according to some embodiments of the present disclosure;

fig. 11 is a schematic view of a light reflection partial structure of a reflection region of a backlight module in a second mode according to some embodiments of the present disclosure;

fig. 12 is a schematic structural diagram of another backlight module according to some embodiments of the present disclosure;

fig. 13 is a schematic structural diagram of a display panel according to some embodiments of the present disclosure;

fig. 14 is a flowchart illustrating a control method of a display panel according to some embodiments of the present disclosure;

fig. 15 is a schematic structural diagram of a display device according to some embodiments of the present disclosure.

The reference numbers in the detailed description are as follows:

10. a substrate; 20. a reflective layer; 21. a reflective region; 22. a light modulating structure; 221. a reflective surface; 222. a drive member; 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 present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only examples, and the protection scope of the present application is not limited thereby.

It is to be noted that technical terms or scientific terms used in the embodiments of the present application should be taken as a general meaning understood by those skilled in the art to which the embodiments of the present application belong, unless otherwise specified.

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 and positional relationships that are based on the orientations and positional relationships shown in the drawings, and are used only for convenience in describing the embodiments of the present application and for simplicity in description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the embodiments of the present application.

Furthermore, the technical terms "first", "second", etc. 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, "a plurality" means two or more unless specifically defined otherwise.

In the description of the embodiments of the present application, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

In the description of the embodiments of the present application, unless otherwise explicitly specified or limited, a first feature "on" or "under" a second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

The inventor of the present application has noticed that the existing display device realizes the peep-proof function by providing the peep-proof film on the display panel. Generally, a privacy film is disposed on one side of a display surface of a display panel, and the privacy film has a property of restricting light from exiting the display panel at a fixed angle by using a louver principle. 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 viewing angle of the display panel is also fixed, and the arrangement of the peep-proof film causes the display brightness of the front viewing angle and the inclined viewing angle of the display panel to be different and cannot be adjusted, thereby affecting the visual experience of a user. On the other hand, the privacy film is disposed on the display surface side of the display panel, so that a part of light emitted from the front viewing angle of the display panel is blocked, and the display brightness of the front viewing angle of the display panel is sacrificed due to the privacy film, thereby affecting the display effect of the display panel.

The inventor of the application 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 light-emitting visual field 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 the peep-proof mode; when the light-emitting angle of view of the backlight module is larger, the backlight module is in a normal display mode. Through the dimming structure, the backlight module can be switched between the peep-proof mode and the normal display mode.

In order to solve the prior art problems, embodiments of the present application provide a backlight module, a display panel, a control method of the display panel, and a display device. The backlight module provided by the embodiment of the present application is first described below. Fig. 1 is a schematic structural diagram of a backlight module according to some embodiments of the present disclosure, fig. 2 is a schematic structural diagram of another backlight module according to some embodiments of the present disclosure, and fig. 3 is a schematic structural diagram of a top view of a backlight module according to some embodiments of the present disclosure.

As shown in fig. 1 to 3, the backlight module includes 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 includes a plurality of reflective regions 21, the reflective regions 21 are disposed with a light-adjusting structure 22, the light-adjusting structure 22 includes 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, the plurality of reflective regions 21 may be distributed in an array, and the shape of the reflective regions 21 may be, but is not limited to, a square, a rectangle, or a triangle.

A dimming structure 22 is disposed in each reflective area 21, and the number of dimming structures 22 in each reflective area 21 may be, but is not limited to, one, two or more. Alternatively, when the number of the light modulation structures 22 in each reflection area 21 is plural, the plural light modulation structures 22 are distributed in an array.

The light adjusting structure 22 includes a reflection surface 221, and the reflection surface 221 can reflect the light emitted from the light source 30. The reflecting surface 221 is disposed away from the substrate 10, and it is understood that a side surface of the reflecting surface 221 capable of reflecting light rays is opposite to the substrate 10. The reflecting surface 221 is movably connected to the substrate 10, and a first included angle a between the reflecting surface 221 and the substrate 10 is adjustable. In the embodiment of the present application, by adjusting the first included angle a between the reflection surface 221 and the substrate 10, the light reflection path of the reflection surface 221 can be changed, so that the reflection area 21 has different light-emitting viewing 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 LED), 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 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 exits 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 reflective regions 21. And, in a direction perpendicular to the substrate 10, an orthogonal projection of the light source 30 on the reflective layer 20 is located at a geometric center of the reflective area 21. The light emitted from the light source 30 can be uniformly distributed on the reflecting surface 221 in the reflecting area 21.

In the above technical solution, by adjusting the first included angle a between the reflection surface 221 and the substrate 10, the light reflection path of the reflection surface 221 can be changed, so that the reflection area 21 has different light-emitting viewing angles, and the backlight module can have different light-emitting viewing angles. When the light-emitting angle of view of the backlight module is smaller, the backlight module is in an anti-peeping mode; when the light-emitting angle of view 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 through the dimming structure 22.

In some embodiments, the light modulating structure 22 further comprises a driving member 222, and the driving member 222 is connected to the reflecting surface 221.

Optionally, the driving component 222 can drive the reflection surface 221 to rotate so as to adjust the first angle a between the reflection surface 221 and the substrate 10. In the light modulating structure 22 provided in the embodiment of the present application, there may be a plurality of corresponding relationships between the driving member 222 and the reflection surfaces 221, for example, one driving member 222 may be disposed corresponding to one reflection surface 221, or one driving member 222 may be disposed corresponding to a plurality of reflection surfaces 221. The driving member 222 is fixedly connected to the substrate, the reflecting surface 221 is connected to the driving member 222, and the driving member 222 can receive an electrical signal to drive the reflecting surface 221 to rotate.

Alternatively, the dimming structure 22 provided in the embodiment of the present application may be a Digital Micromirror Device (DMD). When the light adjusting structure 22 is a digital micro-mirror device, the first included angle a between the reflective surface 221 of the light adjusting structure 22 and the substrate 10 is between 0 degree and 12 degrees. For example, the first angle a between the reflection surface 221 and the substrate 10 may be 0 degree, 10 degrees, or 12 degrees.

The digital micromirror device mainly comprises a reflecting mirror, a torsion arm beam, a hinge, an addressing electrode, a bias electrode, a static memory and the like. The mirror plate is connected with the torque arm beam, the torque arm beam is suspended on the two hinge support columns through hinges, and the mirror plate can rotate around the hinge shaft. The hinge support posts are connected to a bias electrode that can provide a bias voltage to each mirror plate. Each mirror plate has two conductive paths. The addressing electrodes of the torsion beam and the addressing electrodes 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 plates can be presented at different angles. When the digital micro-mirror device works, a bias voltage ('0' or '1') is applied to the reflecting mirror, so that an electrostatic field is formed between the reflecting mirror and an addressing electrode of the reflecting mirror, and between the torsion arm beam and an addressing electrode of the torsion arm beam, thereby generating an electrostatic torque, and enabling the reflecting mirror to rotate around the torsion arm beam, thereby achieving a corresponding deflection angle. 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 disclosure, fig. 5 is a schematic structural view of a light reflection part of a reflection region of the backlight module in the first mode according to some embodiments of the present disclosure, fig. 6 is a schematic structural view of a backlight module in a second mode according to some embodiments of the present disclosure, and fig. 7 is a schematic structural view of a light reflection part of a reflection region of the backlight module in the second mode according to some embodiments of the present disclosure.

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 a part of the reflective surfaces 221 in each of the reflective regions 21 to rotate, so that a second included angle b between at least a part of the reflective surfaces 221 in each of the reflective regions 21 and a first ray X is an acute angle, the first ray X is a ray emitted from a 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 a part of the reflecting surface 221 in each reflecting region 21 to rotate, so that a third included angle c between the at least a part of the reflecting surface 221 in each reflecting region 21 and the first ray X is an obtuse angle.

As mentioned above, the number of the light modulation structures 22 in each reflection area 21 may be multiple, and the multiple light modulation 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 reflective regions 21. And, in a direction perpendicular to the substrate 10, an orthogonal projection of the light source 30 on the reflective layer 20 is located at a geometric center of the reflective area 21. In order to more clearly describe the embodiments of the present application, the above-described settings are explained as examples.

Optionally, the first mode is a privacy mode, and the second mode is a normal display mode.

When the driving part 222 drives at least part of the reflecting surfaces 221 in each of the reflecting regions 21 to rotate, a second included angle b is formed between at least part of the reflecting surfaces 221 in each of the reflecting regions 21 and the first ray X, and the second included angle b is an acute angle, so that the reflecting regions 21 have a smaller light-emitting angle of view, and the backlight module also has a smaller light-emitting angle of view, so that the backlight module is in the peep-proof mode.

When the driving part 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 viewing angle, and the backlight module also has a larger light-emitting viewing angle, so that the backlight module is in a normal display mode.

For example, the position of at least a part of the reflection surface 221 in each reflection area 21 may be various, and for example, the position may be located at the edge of the reflection area 21, or may be located in an area other than the geometric center of the reflection area 21, or may be located in the entire area of the reflection area 21. The embodiment of the present application does not limit the specific location 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 an included angle between at least a part of the reflection surface 221 in each reflection area 21 and the first ray X, a light reflection path of the reflection surface 221 can be changed, so that the reflection areas 21 have different light-emitting viewing angles, and further, the backlight module can have different light-emitting viewing angles. When the included angle between at least part of the reflective surface 221 in each reflective area 21 and the first ray X is an acute angle, the reflective area 21 has a smaller light-emitting viewing angle, so that the backlight module also has a smaller light-emitting viewing angle, and the backlight module is in the anti-peep mode. When the included angle between at least part of the reflecting surface 221 in each reflecting area 21 and the first ray X is an obtuse angle, the reflecting area 21 has a larger light-emitting viewing angle, so that the backlight module also has a larger light-emitting viewing angle, and 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 disclosure, fig. 9 is a schematic structural view of a light reflection partial structure of a reflection region of another backlight module in the first mode according to some embodiments of the present disclosure, fig. 10 is a schematic structural view of another backlight module in a second mode according to some embodiments of the present disclosure, and fig. 11 is a schematic structural view of a light reflection partial structure of a reflection region of another backlight module in the second mode according to some embodiments of the present disclosure.

With continued reference to fig. 8 to 11, in some alternative embodiments, in the first mode, the driving component 222 drives the reflection surface 221 near the edge of the reflection area 21 in each reflection area 21 to rotate, so that the second included angle b between the reflection surface 221 near the edge of the reflection area 21 and the first ray X is an acute angle; in the second mode, the driving part 222 drives the reflection surface 221 near the edge of the reflection region 21 in each reflection region 21 to rotate, so that the third included angle c between the reflection surface 221 near the edge of the reflection region 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 reflective area 21, the reflective surface 221 near the edge of the reflective area 21 has a larger influence on the magnitude of the light-emitting angle of view of the reflective area 21 than the reflective surface 221 near the geometric center of the reflective area 21 has on the magnitude of the light-emitting angle of view of the reflective area 21.

Optionally, when the driving component 222 drives the reflection surface 221, which is close to the edge of the reflection area 21, in each reflection area 21 to rotate, so that the second included angle b between the reflection surface 221, which is close to the edge of the reflection area 21, and the first ray X is an acute angle, the reflection area 21 can have a smaller light-emitting viewing angle, and thus the backlight module also has a smaller light-emitting viewing angle, and the anti-peeping effect of the backlight module can be further enhanced.

When the driving part 222 drives the reflection surface 221 near the edge of the reflection region 21 in each reflection region 21 to rotate, so that the third included angle c between the reflection surface 221 near the edge of the reflection region 21 and the first ray X is an obtuse angle, the reflection region 21 can have a larger light-emitting angle of view, and thus the backlight module also has a larger light-emitting angle of view, and the normal display effect of the backlight module can be further enhanced.

In the above technical scheme, by adjusting the included angle between the reflecting surface 221 near the edge of the reflecting area 21 in each reflecting area 21 and the first ray X, the peeping prevention effect of the backlight module in the peeping prevention 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 another backlight module according to some embodiments of the present disclosure.

With continued reference to fig. 12, in some embodiments, the backlight module further includes a light guide layer 40, and the light guide layer 40 is disposed between the reflective layer 20 and the light source 30.

For example, the light guide layer 40 can improve the uniformity of the light emitted from the light source 30 to the reflective layer 20, and also can 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 polymethylmethacrylate.

In the above technical solution, the light guide layer 40 is disposed between the reflective layer 20 and the light source 30, so that the uniformity of the light emitted from the backlight module can be effectively improved.

In some embodiments, the backlight module further includes a color control layer 50, the color control layer 50 is disposed between the reflective layer 20 and the light guide layer 40, and the color control layer 50 is used for controlling the color of the light emitted from the light source 30.

Optionally, the color control layer 50 can convert 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 taken as a mini led.

Illustratively, the color of the light emitted by the mini led 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, and the blue color conversion film can convert blue light into white light; the color control layer 50 may also include a red color conversion film capable of converting red light into white light; the color manipulation layer 50 may further include a green color conversion film capable of converting green light into white light. Thus, in the embodiments provided in the present application, the color conversion film in the color control layer 50 can be selected according to the color of the light emitted by the mini led.

Among the above-mentioned technical scheme, through set up color regulation and control layer 50 between reflector layer 20 and leaded light layer 40, can convert the light that light source 30 jetted out into white, and then can satisfy the colour requirement of backlight unit light-emitting, further improved backlight unit's light-emitting quality.

Fig. 13 is a schematic structural diagram of a display panel according to some embodiments of the present disclosure.

With reference to fig. 13, based on the backlight module provided in the foregoing embodiments of the present application, an embodiment of the present application further provides a display panel, where the display panel includes an array substrate 100 and the backlight module provided in any of the foregoing embodiments, 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 disposed on a side of the substrate 110 facing away from the driving device layer 120.

In the display panel provided in the embodiment of the present application, the display panel includes an array substrate 100 and a backlight module, the array substrate 100 includes a substrate 110 and a driving device layer 120, and the driving device layer 120 is disposed 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 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 in a direction away from the driving device layer 120, and after the light reaches the reflective layer 20, the reflective layer 20 reflects the light in a direction toward the driving device layer 120, so as to provide backlight for the display panel.

Optionally, the substrate 110 is transparent, the substrate 110 may be disposed in various ways, 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. Alternatively, 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 the pixel units is greater than the number of the dimming structures 22.

Illustratively, the display panel provided by the embodiment of the present application includes a plurality of pixel units, 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 the pixel units is greater than the number of the dimming structures 22. That is, the number of orthographic projections of the plurality of pixel units on the reflective layer 20 in the thickness direction of the display panel is smaller than the number of the dimming structures 22.

Among the above-mentioned technical scheme, because the light that every structure 22 of adjusting luminance reflects has certain regional scope, the light that every structure 22 of adjusting luminance reflects can make the pixel unit that is located its light regional scope luminous, every structure 22 of adjusting luminance can correspond the luminous demand that satisfies a plurality of pixel units, so, set up the quantity of pixel unit to be greater than the quantity of adjusting luminance structure 22, can avoid setting up too much structure 22 of adjusting luminance and the wasting of resources that causes, can reduce display panel's manufacturing cost.

Fig. 14 is a flowchart illustrating a control method of a display panel according to some embodiments of the present disclosure.

With continuing reference to fig. 14, based on the display panel provided in the foregoing embodiment of the present application, an embodiment of the present application further provides a control method of a display panel, where the control method of the display panel includes:

and S01, acquiring the state to be displayed of the display panel.

And S02, controlling the field angle of each reflecting area according to the to-be-displayed state of the display panel.

Step S03, when the to-be-displayed state is the first display state, controlling the reflective surface in each reflective area to be in a first preset state, so that each reflective area has a first viewing angle.

And S04, when the state to be displayed is a second display state, controlling the reflecting surface in each reflecting area to be in a second preset state so that each reflecting area has a second visual angle.

Wherein the first angle of view is less than the second angle of view.

There are many ways to set the sequence of step S03 and step S04, for example, step S03 may be performed before or after step S04, and step S03 and step S04 may also be performed simultaneously.

In the control method of the display panel provided in the embodiment of the present application, the inclination of the reflection surface in each reflection area includes a first preset state and a second preset state corresponding to different display states. Optionally, when the display state is a first preset state, each reflection area has a first field angle; when the display state is the second preset state, each reflection area has a second visual angle. Wherein the first angle of view is less than the second angle of view.

In the process of controlling the display panel, the viewing angle of each reflecting area can be adjusted according to the state to be displayed of the display panel. The display panel comprises a first display state and a second display state. Illustratively, 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 that each reflecting area has a first viewing angle; for another example, the driving part of the light adjusting structure may control the reflective surface in each reflective region to be in the second preset state, so that each reflective region has the second viewing angle.

When the display panel is in the peep-proof state, the driving part of the dimming structure can control the reflecting surface in each reflecting area to be in a first preset state, so that each reflecting area has a first field angle, and the first field angle is smaller so that the backlight module is in the peep-proof mode, and the display panel achieves the peep-proof effect; when the display panel is in a normal display state, 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 angle of view, and the second angle of view is larger so that the backlight module is in a normal display mode, and the display panel can normally display.

In the above technical solution, the driving component of the dimming structure controls the reflection surfaces in the reflection areas to be in different preset states to adjust the size of the field angle of each reflection 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 an included angle between at least part of the reflecting surface in each reflecting area and a first ray as a target included angle, wherein the first ray is a ray which is emitted from the geometric center of the reflecting area to the light source and is vertical 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 reflective region in the reflective layer includes a plurality of reflective surfaces, and the plurality of reflective 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 reflecting regions. In the direction perpendicular to the substrate, the orthographic projection of the light source on the reflective layer is located at the geometric center of the reflective area.

The first ray is a ray emitted from the geometric center of the reflection area toward the light source and perpendicular to the reflection layer.

In some embodiments, the first display state is, for example, a privacy 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 part 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 reflecting area has a smaller field angle so that the backlight module is in the peep-proof mode, and the display panel achieves the peep-proof effect; when the target included angle is an obtuse angle, each reflecting area has a larger field angle so that the backlight module is in a normal display mode, and the display panel can normally display.

For example, the positions of at least part of the reflecting surfaces in the reflecting regions may be various, and for example, the positions may be located at the edges of the reflecting regions, or may be located in a region other than the geometric center of the reflecting regions, or may be the entire region of the reflecting regions. The embodiment of the application does not limit the specific positions of at least part of the reflecting surfaces in each reflecting area, and only needs to switch the display panel between the peep-proof state and the normal display state.

In some optional embodiments, controlling an angle between at least a part of the reflecting surface in each reflecting region and the first ray to be a target 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.

For example, the light source is disposed corresponding to the geometric center of the reflection area, and the inclination angle of the reflection surface near the edge of the reflection area has a larger influence on the size of the light-emitting viewing angle of the backlight module than the inclination angle of the reflection surface near the geometric center of the reflection area has on the size of the light-emitting viewing angle of the display panel. Therefore, when the driving component drives the reflecting surface close to the edge of the reflecting area in each reflecting area to rotate, and the included angle between the reflecting surface close to the edge of the reflecting area and the first ray is an acute angle, the peeping prevention 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, and 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.

Among the above-mentioned technical scheme, adjust the contained angle between the plane of reflection that is close to the reflecting area edge and the first ray in each reflecting area through adjusting luminance structure to the size of control display panel's light-emitting angle of vision can further strengthen display panel's peep-proof effect and normal display effect.

With continuing reference to fig. 15, based on the display panel provided in the foregoing embodiments of the present application, an embodiment of the present application further provides a display device 1000, where the display device 1000 includes the display panel provided in any of the foregoing embodiments.

Since the display device 1000 provided in the embodiment of the present application includes the display panel in any one of the embodiments described above, the display device 1000 provided in the embodiment of the present application has the beneficial effects of the display panel in any one of the embodiments described above, and details are not repeated herein.

The display device 1000 in the embodiment of the present application includes, but is not limited to, a mobile phone, a Personal Digital Assistant (PDA), a tablet computer, an electronic book, a television, a door lock, a smart phone, a console, and other devices having a display function.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present disclosure, and the present disclosure should be construed as being covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims

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 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 each reflecting surface and the substrate is adjustable;

the light source is arranged on one side, away from the substrate, of the reflecting layer and is configured to emit light towards the reflecting surface.

2. A backlight module according to claim 1, wherein the dimming structure further comprises a driving member connected to the reflective surface.

3. The backlight module of claim 2, wherein the backlight module has a first mode and a second mode,

in the first mode, the driving part drives at least part of the reflecting surfaces in each reflecting area to rotate, so that a second included angle between the at least part of the reflecting surfaces 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 second mode, the driving part drives at least part of the reflecting surfaces in each reflecting area to rotate, so that a third included angle between the at least part of the reflecting surfaces and the first ray is an obtuse angle.

4. The backlight module according to claim 3,

in the first 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 second included angle between the reflecting surface close to the edge of the reflecting area and the first ray is an acute angle;

in the second 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.

5. The backlight module according to claim 1, wherein the number of the light sources is plural, and the light sources are disposed in one-to-one correspondence with the reflective regions.

6. The backlight module according to claim 5, wherein an orthogonal projection of the light source on the reflective layer is located at a geometric center of the reflective region along a direction perpendicular to the substrate.

7. The backlight module according to claim 1, wherein the angle between the reflecting surface and the substrate is between 0 degree and 12 degrees.

8. The backlight module according to claim 1, further comprising a light guide layer disposed between the reflective layer and the light source.

9. The backlight module according to claim 8, further comprising a color control layer disposed between the reflective layer and the light guide layer, wherein the color control layer is used for controlling the color of the light emitted from the light source.

10. 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 of claims 1-9, the light source being arranged on a side of the substrate facing away from the driver device layer.

11. The display panel according to claim 10, wherein the display panel comprises a plurality of pixel units;

in the area corresponding to the reflection area, the number of the pixel units is larger than that of the dimming structures.

12. A control method of a display panel for controlling the display panel according to claim 10 or 11, the control method comprising:

acquiring a state to be displayed of the display panel;

when the state to be displayed is a second display state, controlling the reflecting surface in each reflecting area to be in a second preset state so that each reflecting area has a second angle of view;

the first field of view is less than the second field of view.

13. The method according to claim 12, wherein the controlling the viewing angle of each reflective area according to the state of the display panel to be displayed comprises:

controlling an included angle between at least part of the reflecting surface in each reflecting area and a first ray to be a target included angle, wherein the first ray is a ray which is emitted from the geometric center of the reflecting area to a light source and is vertical 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 a second display state, the target included angle is an obtuse angle.

14. The method for controlling a display panel according to claim 13, wherein the controlling an included angle between at least a part of the reflective surface in each of the reflective regions and the first ray comprises:

15. A display device is provided, which is provided with a display panel, comprising a display panel as claimed in claim 10 or 11.