CN116300208B - Backlight module, display device and driving method thereof - Google Patents
Backlight module, display device and driving method thereof Download PDFInfo
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- CN116300208B CN116300208B CN202310353081.2A CN202310353081A CN116300208B CN 116300208 B CN116300208 B CN 116300208B CN 202310353081 A CN202310353081 A CN 202310353081A CN 116300208 B CN116300208 B CN 116300208B
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000011324 bead Substances 0.000 claims abstract description 101
- 239000000463 material Substances 0.000 claims description 13
- 230000005684 electric field Effects 0.000 claims description 10
- 230000004888 barrier function Effects 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 8
- 239000012780 transparent material Substances 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 3
- 244000144985 peep Species 0.000 abstract description 16
- 230000002265 prevention Effects 0.000 abstract description 14
- 238000010586 diagram Methods 0.000 description 6
- 238000005192 partition Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
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- 238000000638 solvent extraction Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1323—Arrangements for providing a switchable viewing angle
Abstract
The application discloses a backlight module, a display device and a driving method thereof, wherein the backlight module comprises a lamp panel, lamp beads and a peep-proof structure, and the lamp beads are arranged on the lamp panel to perform luminous display; the peep-proof structure is arranged on the light-emitting surface of the lamp bead; the peep-proof structure comprises a first area and a second area which are adjacently arranged, wherein the light convergence degrees of the first area and the second area are different, and divergent light rays initially emitted by the lamp beads are changed into collimated light rays after passing through the first area; when the first area of the peep-proof structure rotates to be right above the lamp beads, the display device enters a peep-proof mode for display; when the second area of the peep-proof structure rotates to the position right above the lamp beads, the display device enters a sharing mode for display. According to the application, two areas with different light converging degrees are arranged on the light emitting surface of the lamp bead, and when the first area is moved to the upper part of the lamp bead by controlling the position movement of the two areas, the divergent light emitted by the lamp bead can be changed into the quasi-straight light so as to realize peep prevention.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a backlight module, a display device and a driving method thereof.
Background
The Liquid crystal display (Liquid CRYSTAL DISPLAY, LCD) has the advantages of thin body, power saving, no radiation and the like, is widely applied, and becomes an indispensable product in modern IT and video products; with the development of society and the enrichment of material conditions, the combination between various portable electronic devices such as mobile phones, computers and televisions and life and work of people is becoming more and more compact.
At present, the portable display device becomes a necessity in life of people, and brings great convenience and life pleasure to the life of people; most people have the habit of using portable electronic products in public places, for example, reading, learning or carrying out short message communication through mobile phones or tablet computers in the process of sitting on a car or waiting for the car, but when watching the electronic products in the public places, because the range of the visual angle of the traditional electronic products is wider, other people beside the user can clear the displayed picture of the electronic products except the front view angle, the privacy of the user is difficult to protect, and inconvenience is brought to the user.
Disclosure of Invention
The application aims to provide a backlight module, a display device and a driving method thereof, which avoid the problem of privacy leakage caused by the use of the display device.
The application discloses a backlight module of a display device, which comprises a lamp panel, lamp beads and a peep-proof structure, wherein the lamp beads are arranged on the lamp panel to perform luminous display; the peep-proof structure is arranged on the light emitting surface of the lamp bead; the peep-proof structure comprises a first area and a second area which are adjacently arranged, wherein the light convergence degrees of the first area and the second area are different, and divergent light rays emitted by the lamp beads initially become collimated light rays after passing through the first area; when the first area of the peep-proof structure rotates to be right above the lamp beads, the display device enters a peep-proof mode for display; and when the second area of the peep-proof structure rotates to be right above the lamp beads, the display device enters a sharing mode for display.
Optionally, the peep-proof structure is rotated by a driving structure, the driving structure comprises a fixing rod and a driving wall, the fixing rod is fixed on the lamp panel, the driving wall is sleeved on the fixing rod, and one side of the driving wall away from the lamp panel is fixedly connected with the peep-proof structure; the driving wall is made of conductive materials, two driving electrodes are arranged on two sides of the driving wall, the two driving electrodes are fixed on the lamp panel, one driving electrode is located below the first area, and the other driving electrode is located below the second area; an electric field is generated between the two driving electrodes, so that the driving wall rotates to drive the peep-proof structure to rotate, and when the first area of the peep-proof structure rotates to be right above the lamp beads, the display device enters a peep-proof mode for display; and when the second area of the peep-proof structure rotates to be right above the lamp beads, the display device enters a sharing mode for display.
Optionally, each peep-proof structure is arranged corresponding to at least two lamp beads, the first area of each peep-proof structure comprises two first fan-shaped structures which are symmetrical with each other with the fixing rod as a center, one side of the driving wall, which is far away from the lamp panel, is fixedly connected with the two first fan-shaped structures respectively, and the second area comprises two hollowed-out second fan-shaped structures which are symmetrical with each other with the fixing rod as a center; the first fan-shaped structure is provided with a first through hole and a blocking layer surrounding the first through hole; when the display device enters a peep-proof mode, two first through holes of two first fan-shaped structures of the first area of the peep-proof structure are respectively rotated to the positions right above two adjacent lamp beads; when the display device enters a sharing mode, the second area of the peep-proof structure rotates to the position right above the lamp beads.
Optionally, a limiting structure is arranged on the fixing rod, the limiting structure is arranged on two sides of the fixing rod, and the limiting structure controls the rotatable angle of the first fan-shaped structure to be a, wherein a is more than or equal to 60 degrees and less than or equal to 120 degrees.
Optionally, the barrier layer is formed by using a light-transmitting material, the first through hole is filled with the light-transmitting material to form a lens structure, the refractive index of the light-transmitting material is larger than that of the barrier layer, the lens structure and the barrier layer are integrally formed, and the height of one surface of the lens structure away from the driving wall is higher than that of one surface of the barrier layer away from the driving wall.
Optionally, each first fan-shaped structure is further internally provided with a second through hole, a transparent material is filled in the second through hole to form a lens structure, the thicknesses of the lens structures formed in the first through hole and the second through hole are different, so that the convergence degrees of light rays emitted by the lamp beads are different, and the focal lengths of the two lens structures formed by the first through hole and the second through hole are equal to or greater than the distance from the peep-proof structure to the lamp beads.
Optionally, each peep-proof structure corresponds to one lamp bead, the second area surrounds the first area, the first area is hollowed out, and the second area is formed by using transparent materials.
Optionally, the peep-proof structure is arranged in a whole layer and covers all the lamp beads, the first area and the second area are provided with a plurality of lamp beads, each of the first area and the second area corresponds to a row of lamp beads, and the first area and the second area are arranged at intervals along the direction of a data line of the display device; the peep-proof structure is connected with the lamp panel through a moving structure, one end of the moving structure is fixedly connected with the peep-proof structure, one end of the moving structure is movably connected with the lamp panel, and the moving structure moves up and down along the direction of the data line; when the first area of the peep-proof structure rotates to be right above the lamp beads after the moving structure moves upwards by a preset distance, the display device enters a peep-proof mode for display; after the moving structure moves upwards by a preset distance, when the second area of the peep-proof structure rotates to be right above the lamp beads, the display device enters a sharing mode for display.
The application also discloses a display device, which comprises the backlight module, a display panel and a driving circuit, wherein the driving circuit respectively outputs corresponding electric signals to the lamp beads and the driving electrodes, and is used for driving the lamp beads of the backlight module to emit light and controlling the rotation of the peep-proof structure of the backlight module so as to control the display panel to enter the peep-proof mode or the sharing mode.
The application also discloses a driving method of the display device, which is used for driving the display device, and comprises the following steps:
The lamp beads emit light after receiving the electric signals output by the driving circuit so as to emit divergent light rays to perform backlight display of the display device;
Selecting a display mode of the display device to be started, if the peep-proof mode is started, outputting a corresponding electric signal to a driving electrode by the driving circuit, generating an electric field after the driving electrode receives the corresponding electric signal to enable the driving wall to rotate, controlling the peep-proof structure to rotate so that a first area of the peep-proof structure rotates to be right above the lamp beads, and entering the peep-proof mode; if the sharing mode is started, the driving circuit outputs a corresponding electric signal to the driving electrode, the driving electrode generates an electric field after receiving the corresponding electric signal so as to enable the driving wall to rotate, and therefore the peep-proof structure is controlled to rotate, and when the second area of the peep-proof structure rotates to be right above the lamp beads, the display device enters the sharing mode.
The application sets up the peep-proof structure on the light-emitting surface of the lamp bead, the peep-proof structure includes two different light-transmitting areas, two light-transmitting areas are first area and second area separately, after the first area and second area receive the divergent light that the identical lamp bead emits, the convergence degree to the emission light is different, when the said second area of the said peep-proof structure rotates to the said lamp bead directly over, the light that the lamp bead emits is still divergent light, the vertical angle or light luminance of the side angle is the same, the said display device enters the sharing mode to reveal, do not peep-proof; when the first area of the peep-proof structure rotates to the position right above the lamp beads, the display device enters the peep-proof mode for display, the first area can change divergent light into straight light, light emitted from the side face is reduced, light is weakened when human eyes look at from the side face, peep-proof is achieved, and privacy leakage is avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is evident that the figures in the following description are only some embodiments of the application, from which other figures can be obtained without inventive effort for a person skilled in the art. In the drawings:
Fig. 1 is a schematic structural diagram of a backlight module in a peep-proof mode according to a first embodiment of the present application;
Fig. 2 is a schematic view of a peep-proof mode optical path according to a first embodiment of the present application;
Fig. 3 is a schematic structural diagram of a backlight module in a sharing mode according to a first embodiment of the present application;
FIG. 4 is a schematic illustration of a shared mode optical path of a first embodiment of the present application;
fig. 5 is a schematic diagram of a backlight module sharing mode according to a second embodiment of the present application;
Fig. 6 is a schematic structural view of a peep-proof structure according to a second embodiment of the present application;
Fig. 7 is a structural perspective view of a second embodiment privacy structure of the present application;
Fig. 8 is a schematic structural view of a peep-proof structure according to a third embodiment of the present application;
fig. 9 is a schematic structural diagram of a backlight module in a peep-proof mode according to a fourth embodiment of the present application;
Fig. 10 is a schematic diagram of a backlight module sharing mode according to a fifth embodiment of the present application;
fig. 11 is a schematic structural diagram of a backlight module according to a sixth embodiment of the present application in a peep-proof mode;
Fig. 12 is a schematic view of a display device according to a seventh embodiment of the present application;
Fig. 13 is a flowchart illustrating a driving method of a display device according to an eighth embodiment of the present application.
100, A backlight module; 110. a lamp panel; 120. a lamp bead; 130. a peep-proof structure; 131. a first region; 132. a second region; 133. a first fan-shaped structure; 134. a second fan-shaped structure; 135. a first through hole; 136. a barrier layer; 137. a second through hole; 138. a lens structure; 140. a driving structure; 141. a fixed rod; 142. a driving wall; 150. a driving electrode; 160. a moving structure; 170. a partitioned area; 180. a limit structure; 200. a display device; 300. a driving circuit; 400. a display panel.
Detailed Description
It is to be understood that the terminology used herein, the specific structural and functional details disclosed are merely representative for the purpose of describing particular embodiments, but that the application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.
In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or implicitly indicating the number of technical features indicated. Thus, unless otherwise indicated, features defining "first", "second" may include one or more such features either explicitly or implicitly; the meaning of "plurality" is two or more. The terms "comprises," "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that one or more other features, integers, steps, operations, elements, components, and/or groups thereof may be present or added.
In addition, terms of the azimuth or positional relationship indicated by "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are described based on the azimuth or relative positional relationship shown in the drawings, are merely for convenience of description of the present application, and do not indicate that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application.
Furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
The application is described in detail below with reference to the attached drawings and alternative embodiments.
As shown in fig. 1, as a first embodiment of the present application, a backlight module 100 of a display device is disclosed, the backlight module 100 includes a lamp panel 110, lamp beads 120 and a peep-proof structure 130, the lamp beads 120 are arranged on the lamp panel 110 in a matrix, circuit traces are generally arranged on the lamp panel 110, and under the condition of power-on, the lamp beads 120 perform luminous display; the peep-proof structure 130 is disposed on the light-emitting surface of the lamp bead 120, and gathers the divergent light emitted by the lamp bead 120 partially when the lamp bead 120 emits light; the peep-proof structure 130 includes a first area 131 and a second area 132 that are adjacently disposed, the light converging degrees of the first area 131 and the second area 132 are different, the divergent light initially emitted by the lamp bead 120 is changed into a quasi-straight light after passing through the first area 131, and the divergent light emitted by the lamp bead 120 is not gathered or converged by the second area 132, or the gathering degree is less than that of the first area 131.
In this embodiment, when the user needs to perform peep prevention, the peep prevention structure 130 may enter the peep prevention mode through manual control, generally, if the peep prevention mode is started, the peep prevention structure 130 will move or rotate, as shown in fig. 1 and 2, when the first area 131 of the peep prevention structure 130 rotates to a position right above the lamp beads 120, the display device 200 enters the peep prevention mode for display, the peep prevention structure 130 will automatically stop rotating or moving, at this time, the divergent light emitted by the lamp beads 120 will become collimated light after passing through the first area 131, so that the content displayed on the display panel 400 of the display device 200 can be seen only from the view angle perpendicular to the light-emitting surface, and the light on both sides will not be gathered to diverge the light to enter the display panel 400, so that the content displayed on the display panel 400 seen from other view angles will be dark or cannot be seen clearly, thereby realizing peep prevention display; referring to fig. 3 and fig. 4, when the second area 132 of the peep-proof structure 130 rotates to a position right above the lamp beads 120, the display device 200 enters the sharing mode to display, the scattered light emitted by the lamp beads 120 still is scattered light after passing through the second area 132, the viewing angle is enlarged, the brightness of the light in the vertical direction of the light emitting surface and the brightness of the light at the edge are substantially the same, and the side surface can also see the display content of the display panel 400.
As a second embodiment of the present application, as shown in fig. 5 to 7, which is a further refinement and improvement of the first embodiment, the present embodiment mainly teaches how the first area 131 and the second area 132 of the peep-proof structure 130 move or rotate to achieve positions, the peep-proof structure 130 rotates through a driving structure 140, the driving structure 140 includes a fixing rod 141 and a driving wall 142, the fixing rod 141 is fixed on the lamp panel 110, the driving wall 142 is sleeved on the fixing rod 141, and one side of the driving wall 142 away from the lamp panel 110 is fixedly connected with the peep-proof structure 130; the driving wall 142 is made of conductive material, two driving electrodes 150 for fixing the lamp panel are arranged on two sides of the driving wall 142, one driving electrode 150 is located below the first area 131, and the other driving electrode 150 is located below the second area 132; an electric field is generated between the two driving electrodes 150 to rotate the driving wall 142, so as to drive the peep-proof structure 130 to rotate, and when the first area 131 of the peep-proof structure 130 rotates to a position right above the lamp beads 120, the display device 200 enters a peep-proof mode for displaying; when the second area 132 of the privacy structure 130 is rotated to a position directly above the light beads 120, the display device 200 enters a sharing mode for displaying.
Each peep-proof structure 130 is disposed corresponding to at least two lamp beads 120, the first region 131 of the peep-proof structure 130 includes two first fan-shaped structures 133 symmetrical to each other with the fixing rod 141 as a center, one side of the driving wall 142 away from the lamp panel 110 is fixedly connected with the two first fan-shaped structures 133, and the second region 132 includes two hollow second fan-shaped structures 134 symmetrical to each other with the fixing rod 141 as a center; the first fan-shaped structure 133 is provided with a first through hole 135 and a blocking layer 136 surrounding the first through hole 135, the first through hole 135 can make the divergent light emitted by the lamp beads 120 converge, so that the light in the direction perpendicular to the light emitting surface is brighter, the light on the side is blocked or the brightness is lower because of the divergent light, and then the picture seen by the view angle of the side is darker, and the display content cannot be seen; when the display device 200 enters the peep-proof mode, the two first through holes 135 of the two first fan-shaped structures 133 of the first region 131 of the peep-proof structure 130 are respectively rotated to right above the two adjacent lamp beads 120; when the display device 200 enters the sharing mode, the second area 132 of the peep-proof structure 130 rotates to a position right above the lamp beads 120. The fixed rod 141 is provided with a limit structure 180, the limit structure 180 is disposed on two sides of the fixed rod 141, and the limit structure 180 controls the rotatable angle of the first fan-shaped structure 133 to be a, wherein a is greater than or equal to 60 degrees and less than or equal to 120 degrees, and is generally 90 degrees.
The blocking layer 136 is formed by using a light-transmitting material, the first through hole 135 is filled with the light-transmitting material to form the lens structure 138, the refractive index of the light-transmitting material is larger than that of the blocking layer 136, the lens structure 138 and the blocking layer 136 are integrally formed, the height of one surface of the lens structure 138 away from the driving wall 142 is higher than that of one surface of the blocking layer 136 away from the driving wall 142, the blocking layer 136 can be formed by using a material with a certain light polymerization capability, can be formed by using a common transparent material, and can be used selectively according to actual needs.
In this embodiment, the peep-proof structure 130 and the driving structure 140 are integrally formed by two-photon 3D printing and other technologies to form a micro-rotation device capable of rotating to achieve the peep-proof effect, and charged particles are added in the process of preparing the micro-rotation device to make the micro-rotation device (such as the driving wall 142) have a certain electrical property, so that the micro-rotation device can be driven by an electrode (or magnetic particles are added to make the micro-rotation device have magnetism, and the micro-rotation device is driven by a magnetic field, and then electric driving is taken as an example). The drive wall 142 is used to force the entire micro-rotational device to rotate 90 °. Limiting structures are arranged on the left and right sides of the driving wall 142 of each micro-rotating device, the purpose of the limiting structures is to enable the rotation angle of the micro-rotating device to be stabilized at 90 degrees, in addition, electrodes are arranged near the limiting structures 180 and used for driving the micro-rotating device to rotate, and electricity is mainly transmitted to the electrodes by means of an external driving IC, so that the driving wall 142 with electricity is stressed to rotate. When the peep-proof display is needed, the through hole of the first area 131 is rotated to the upper portion of the lamp bead 120, and divergent light emitted by the lamp bead 120 is focused by the lens to be changed into straight light, so that the peep-proof display is realized. When the sharing display is needed, the second area 132 is controlled to rotate to a position right above the lamp beads 120, so that the divergent light can directly pass through the hollowed-out portion to realize the sharing mode of the display panel 400.
As shown in fig. 8, as a third embodiment of the present application, unlike the above-mentioned embodiments, a second through hole 137 is further provided in each of the first fan-shaped structures 133, a lens structure 138 is formed by filling a light-transmitting material into the second through hole 137, and thicknesses of the lens structures 138 formed in the first through hole 135 and the second through hole 137 are different, so that the concentration degrees of the light emitted by the lamp beads 120 are different, and focal lengths of the two lens structures 138 formed by the first through hole 135 and the second through hole 137 are equal to or greater than a distance from the peep-proof structure 130 to the lamp beads 120.
The first fan-shaped structure 133 of the peep-proof structure 130 may have more than one lens, for example, two lenses may be provided, and the thicknesses of the two lenses are different, so that the converging degrees of the light rays emitted by the lamp beads 120 are different, and the peep-proof at different angles is realized, but the focal lengths of the two lenses are larger than or equal to (or slightly smaller than) the distance from the rotation plane to the lamp beads 120, so as to realize the function of condensing light.
As shown in fig. 9, as a fourth embodiment of the present application, unlike the above embodiment, each of the peep-proof structures 130 is disposed corresponding to one of the lamp beads 120, the second region 132 is disposed around the first region 131, the first region 131 is disposed in a hollowed-out manner, the second region 132 is formed by using a transparent material, the first region 131 corresponds to the first through hole 135 in the above embodiment, and a light-transmitting material with a high refractive index may be filled in the first region 131, so that the light convergence degree of the first region 131 is higher than the light convergence degree of the second region 132, and the peep-proof display is implemented.
As shown in fig. 10, as a fifth embodiment of the present application, the peep-proof structure 130 is provided as a whole layer and covers all the light beads 120, the first area 131 and the second area 132 are provided in plurality, each of the first area 131 and the second area 132 is provided corresponding to a row of the light beads 120, and the first area 131 and the second area 132 are provided at intervals along the data line direction of the display device 200; the peep-proof structure 130 is connected with the lamp panel 110 through a moving structure 160, one end of the moving structure 160 is fixedly connected with the peep-proof structure 130, one end of the moving structure 160 is movably connected with the lamp panel 110, and the moving structure 160 moves up and down along the direction of the data line; a first through hole 135 is disposed in the first region 131 corresponding to each of the lamp beads 120.
When the moving structure 160 moves up by a preset distance and the first area 131 of the peep-proof structure 130 rotates to a position right above the lamp bead 120, the lamp bead 120 faces the first through hole 135, and the display device 200 enters the peep-proof mode for display; after the moving structure 160 moves up by a preset distance, the display device 200 enters a sharing mode for displaying when the second area 132 of the peep-proof structure 130 rotates to a position right above the lamp beads 120; the moving structure 160 may be a pulley with magnetic ions, and two large driving electrodes are arranged up and down on the moving structure 160, and after the driving electrodes are electrified, the pulley can slide up and down, so that the whole layer of peep-proof structure is driven to move up and down; the moving structure can drive the whole layer of peep-proof structure to move up and down by the micro motor, and can also be a dial switch, and the whole layer of peep-proof structure can also move up and down by a mechanical transmission structure.
As shown in fig. 11, as a sixth embodiment of the present application, unlike the above embodiment, the present embodiment may implement the partial area peep prevention of the display area, divide the areas of all the light beads 120 on the light panel 110 to form a plurality of partition areas 170, where the electrical signals connected to each partition area 170 are different, or vice versa, a part of the areas implement the peep prevention mode, a part of the partition areas 170 open the sharing mode, and may automatically select the area that needs to be peeped, for example, the user uses a payment code, or other two-dimensional codes, performs peep prevention display corresponding to the two-dimensional code area, and other areas may perform peep prevention display.
As shown in fig. 12, as a seventh embodiment of the present application, a display device 200 is further disclosed, where the display device 200 includes the backlight module 100, the display panel 400 and the driving circuit 300 according to any of the embodiments above, and the driving circuit 300 outputs corresponding electrical signals to the lamp beads 120 and the driving electrodes 150, respectively, for driving the lamp beads 120 of the backlight module 100 to emit light and controlling the rotation of the peep preventing structure 130 of the backlight module 100, so as to control the display panel 400 to enter the peep preventing mode or the sharing mode.
It should be noted that, the light bead 120 of the present application may be a mini-LED light bead 120, or may be a Micro-LED light bead 120, or may be a light bead 120 in a backlight module 100 of a common display device 200, or may be selected according to actual situations, and the present application is mainly exemplified by the mini-LED light bead 120.
As shown in fig. 13, as an eighth embodiment of the present application, there is disclosed a driving method of a display device for driving the display device according to the above embodiment, characterized by comprising the steps of:
s1: the lamp beads emit light after receiving the electric signals output by the driving circuit so as to emit divergent light rays to perform backlight display of the display device;
S2: selecting a display mode of the display device to be started, if the peep-proof mode is started, outputting a corresponding electric signal to a driving electrode by the driving circuit, generating an electric field after the driving electrode receives the corresponding electric signal to enable the driving wall to rotate, controlling the peep-proof structure to rotate so that a first area of the peep-proof structure rotates to be right above the lamp beads, and entering the peep-proof mode; if the sharing mode is started, the driving circuit outputs a corresponding electric signal to the driving electrode, the driving electrode generates an electric field after receiving the corresponding electric signal so as to enable the driving wall to rotate, and therefore the peep-proof structure is controlled to rotate, and when the second area of the peep-proof structure rotates to be right above the lamp beads, the display device enters the sharing mode.
Referring to fig. 5, 6, 12 and 13, the user selects and controls the display device 200 to enter the peep-proof mode or the sharing mode, and then the driving chip of the display device 200 provides corresponding driving voltages to the driving electrodes 150, and an electric field is generated between the driving electrodes 150 to rotate the driving wall 142, so that the first area 131 or the second area 132 of the peep-proof structure 130 rotates above the lamp beads 120 to realize peep-proof or sharing; in addition, in the case of partitioning, the driving chip may output different voltage signals to different partition areas 170 according to the corresponding display areas, so as to control the peep-proof structures 130 of different partition areas 170 to perform different rotations, thereby realizing partitioned peep-proof.
It should be noted that, the limitation of each step in the present solution is not to be considered as limiting the sequence of steps on the premise of not affecting the implementation of the specific solution, and the steps written in the previous step may be executed before, or executed after, or even executed simultaneously, so long as the implementation of the present solution is possible, all the steps should be considered as falling within the protection scope of the present application.
It should be noted that, the inventive concept of the present application can form a very large number of embodiments, but the application documents are limited in space and cannot be listed one by one, so that on the premise of no conflict, the above-described embodiments or technical features can be arbitrarily combined to form new embodiments, and after the embodiments or technical features are combined, the original technical effects will be enhanced.
The above description of the application in connection with specific alternative embodiments is further detailed and it is not intended that the application be limited to the specific embodiments disclosed. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the application, and these should be considered to be within the scope of the application.
Claims (8)
1. A backlight module of a display device, comprising:
A lamp panel;
The lamp beads are arranged on the lamp panel and used for luminous display; and
The peep-proof structure is arranged on the light-emitting surface of the lamp bead;
The peep-proof structure comprises a first area and a second area which are adjacently arranged, wherein the light convergence degrees of the first area and the second area are different, and divergent light rays emitted by the lamp beads initially become collimated light rays after passing through the first area;
when the first area of the peep-proof structure rotates to be right above the lamp beads, the display device enters a peep-proof mode for display; when the second area of the peep-proof structure rotates to be right above the lamp beads, the display device enters a sharing mode for display;
the peep-proof structure rotates through a driving structure, the driving structure comprises a fixing rod and a driving wall, the fixing rod is fixed on the lamp panel, the driving wall is sleeved on the fixing rod, and one side, far away from the lamp panel, of the driving wall is fixedly connected with the peep-proof structure; the driving wall is made of conductive materials, two driving electrodes are arranged on two sides of the driving wall, the two driving electrodes are fixed on the lamp panel, one driving electrode is located below the first area, and the other driving electrode is located below the second area;
An electric field is generated between the two driving electrodes, so that the driving wall rotates to drive the peep-proof structure to rotate, and when the first area of the peep-proof structure rotates to be right above the lamp beads, the display device enters a peep-proof mode for display; and when the second area of the peep-proof structure rotates to be right above the lamp beads, the display device enters a sharing mode for display.
2. The backlight module according to claim 1, wherein each peep-proof structure is arranged corresponding to at least two lamp beads, a first area of the peep-proof structure comprises two first fan-shaped structures which are symmetrical with each other with a fixing rod as a center, one side of the driving wall away from the lamp panel is fixedly connected with the two first fan-shaped structures respectively, and a second area comprises two hollowed-out second fan-shaped structures which are symmetrical with each other with the fixing rod as a center; the first fan-shaped structure is provided with a first through hole and a blocking layer surrounding the first through hole;
When the display device enters a peep-proof mode, two first through holes of two first fan-shaped structures of the first area of the peep-proof structure are respectively rotated to the positions right above two adjacent lamp beads; when the display device enters a sharing mode, the second area of the peep-proof structure rotates to the position right above the lamp beads.
3. The backlight module according to claim 2, wherein the fixing rod is provided with a limiting structure, the limiting structure is arranged on two sides of the fixing rod, and the limiting structure controls the rotatable angle of the first fan-shaped structure to be a, wherein a is larger than or equal to 60 degrees and smaller than or equal to 120 degrees.
4. The backlight module according to claim 2, wherein the barrier layer is formed by using a light-transmitting material, the first through hole is filled with the light-transmitting material to form a lens structure, the refractive index of the light-transmitting material is larger than that of the barrier layer, the lens structure and the barrier layer are integrally formed, and the height of one surface of the lens structure away from the driving wall is higher than that of one surface of the barrier layer away from the driving wall.
5. The backlight module of claim 4, wherein each of the first fan-shaped structures is further provided with a second through hole, a transparent material is filled in the second through holes to form a lens structure, and thicknesses of the lens structures formed in the first through holes and the second through holes are different, so that the convergence degree of light rays emitted by the lamp beads is different, and focal lengths of the two lens structures formed by the first through holes and the second through holes are larger than or equal to the distance from the peep-proof structure to the lamp beads.
6. The backlight module according to claim 1, wherein each peep-proof structure is disposed corresponding to one of the lamp beads, the second region is disposed around the first region, the first region is disposed in a hollowed-out manner, and the second region is formed by using a transparent material.
7. A display device, comprising the backlight module, the display panel and the driving circuit according to any one of claims 1-6, wherein the driving circuit outputs corresponding electrical signals to the lamp beads and the driving electrodes, respectively, for driving the lamp beads of the backlight module to emit light and controlling the rotation of the peep-proof structure of the backlight module so as to control the display panel to enter a peep-proof mode or a sharing mode.
8. A driving method of a display device for driving the display device according to claim 7, comprising the steps of:
The lamp beads emit light after receiving the electric signals output by the driving circuit so as to emit divergent light rays to perform backlight display of the display device;
Selecting a display mode of the display device to be started, if the peep-proof mode is started, outputting a corresponding electric signal to a driving electrode by the driving circuit, generating an electric field after the driving electrode receives the corresponding electric signal to enable the driving wall to rotate, controlling the peep-proof structure to rotate so that a first area of the peep-proof structure rotates to be right above the lamp beads, and entering the peep-proof mode; if the sharing mode is started, the driving circuit outputs a corresponding electric signal to the driving electrode, the driving electrode generates an electric field after receiving the corresponding electric signal so as to enable the driving wall to rotate, and therefore the peep-proof structure is controlled to rotate, and when the second area of the peep-proof structure rotates to be right above the lamp beads, the display device enters the sharing mode.
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| JP2004045989A (en) * | 2002-07-15 | 2004-02-12 | Casio Comput Co Ltd | Projection type display method and display driving method for the same |
| EP2434204A2 (en) * | 2010-09-27 | 2012-03-28 | Audi AG | Headlamp for motor vehicle and motor vehicle |
| CN108957853A (en) * | 2018-07-18 | 2018-12-07 | 昆山龙腾光电有限公司 | Backlight module and liquid crystal display device |
| CN209821548U (en) * | 2019-05-14 | 2019-12-20 | 昆山龙腾光电有限公司 | Display device with switchable viewing angle |
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