WO2022111679A1 - 一种背光模组及显示屏 - Google Patents
一种背光模组及显示屏 Download PDFInfo
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- WO2022111679A1 WO2022111679A1 PCT/CN2021/133915 CN2021133915W WO2022111679A1 WO 2022111679 A1 WO2022111679 A1 WO 2022111679A1 CN 2021133915 W CN2021133915 W CN 2021133915W WO 2022111679 A1 WO2022111679 A1 WO 2022111679A1
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- WO
- WIPO (PCT)
- Prior art keywords
- light
- emitting
- light source
- backlight module
- reflective film
- Prior art date
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Images
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
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- 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
- G02F1/133609—Direct backlight including means for improving the color mixing, e.g. white
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/58—Optical field-shaping elements
- H01L33/60—Reflective elements
Definitions
- the present application relates to the technical field of display devices, and in particular, to a backlight module and a display screen.
- the liquid crystal material itself does not emit light, and it must rely on a passive light source, which requires the light source to illuminate the liquid crystal panel from the back to control the output of the light to form an image.
- the mainstream liquid crystal backlight technology on the market uses light-emitting diodes as light sources, and the mainstream methods include edge-type backlight modules and direct-type backlight modules.
- the side-illuminated backlight module places the light source on the side of the module, and the light enters from the side and passes through the light guide plate.
- the edge-type backlight module has the advantage of being thin and light, but all light sources need to be turned on all the time to ensure uniform light output, and the light source cannot be adjusted according to the brightness of the image area.
- the direct type backlight module places the light source directly on the lower side of the panel, the light source array is evenly arranged, and the light directly enters the display panel from the bottom of the display panel to form uniform illumination on the display panel.
- the light source of the backlight module is located directly under the display panel, the brightness of different light sources can be controlled according to the brightness of the displayed image.
- due to the wide diffusion range of the light source when a single area on the display panel is lit A large-scale halo will be formed, which will cause obvious halo when displaying bright objects with a black background, reducing the local display contrast effect.
- the present application provides a backlight module and a display screen, which improve the light emitting effect of the backlight module to provide the display effect of the display screen.
- a backlight module is provided.
- the backlight module is applied in a display device and used to provide light to the display device.
- the backlight module includes a substrate and a light source assembly.
- the substrate has a plurality of light-emitting regions, and the plurality of light-emitting regions are arranged in an array.
- the number of the light source components is multiple, and the multiple light source components are arranged in the multiple light emitting areas in a one-to-one correspondence.
- each light source assembly includes a plurality of light source elements arranged in an array, and each light source element includes a light emitting unit and a reflective film for splitting the light emitted by the light emitting unit.
- the reflective film When the reflective film is installed, the following conditions are met: along the direction from the center to the edge of the light-emitting area where the light source element is located, the proportion of the light-splitting film toward the center of the light-emitting area gradually increases. In order to make the light emitted by the light source assembly have a good light mixing effect in the light emitting area, the light emitting effect of the backlight module is improved. In addition, the light is split through the reflective film, which is convenient for the miniaturization of the backlight module.
- the reflective film is located on the light-emitting side of the corresponding light-emitting unit, the reflective film faces the top light-emitting surface of the light-emitting unit, and is used for splitting the light from the top of the light-emitting unit .
- the light emitted from the top of the light-emitting unit is mixed by the reflective film.
- the reflective film is a tapered surface; the tapered tip of the reflective film faces the top light-emitting surface of the corresponding light-emitting unit; and in the direction away from the center of the light-emitting area, the reflective film
- the distance between the straight line perpendicular to the light-emitting unit where the cone tip of the film is located and the centerline of the corresponding light-emitting unit gradually increases, and the centerline of the light-emitting unit refers to passing through the light-emitting unit along the thickness direction of the substrate. the center of the line.
- the light is split using a cone-shaped face.
- the conical surface is a conical surface, a triangular pyramid surface, a quadrangular pyramid surface and other different conical surfaces. Different conical surfaces can be selected for beam splitting.
- the distance between the straight line where the cone tip of the reflective film is located and runs through the substrate along the thickness direction of the substrate and the center line of the light-emitting region is the first distance
- the distance between the center line of the light-emitting unit corresponding to the reflective film and the center line of the light-emitting area is a second distance
- the first distance is greater than the second distance
- the light-emitting area is
- the center line refers to a straight line passing through the center of the light-emitting region in the thickness direction of the substrate.
- connection line between the projection of the cone tip of the reflective film in the first plane and the projection of the center of the light-emitting area in the first plane is the first connection line;
- the center line of the light-emitting unit corresponding to the reflective film intersects the first connection line, and the first plane is parallel to the surface of the substrate. The effect of splitting has been improved.
- the reflective film is provided with a plurality of light-passing holes. The effect of light splitting is improved by the set light apertures.
- the plurality of light-passing holes are uniformly arranged in the reflective film. Improve the light splitting effect.
- the reflective film is adhesively connected to the top light-emitting surface of the light-emitting unit through transparent glue. The relative fixation of the reflective film and the light-emitting unit is realized.
- each light source element further includes a flat layer covering the reflective film. It is convenient for the processing of light source parts.
- the flat layer is a transparent structure
- the reflective film is a plating layer disposed on the flat layer.
- the flat layer is reflective white glue
- the reflective film is the surface of the reflective white glue facing the corresponding light-emitting unit.
- the backlight module further includes a diffuser film and a prismatic brightness enhancement film; the diffuser film and the prismatic brightness enhancement film are laminated; the diffuser film is opposite to the prismatic brightness enhancement film closer to the plurality of light source assemblies.
- the light mixing effect of the backlight module is further improved.
- each light-emitting area corresponds to a display area of the display screen one-to-one.
- the display effect of the display device is improved.
- a display screen in a second aspect, includes the backlight module described in any one of the above and a liquid crystal layer stacked with the backlight module.
- the reflective film for light splitting By adopting the reflective film for light splitting, and along the direction from the center to the edge of the light emitting area where the light source element is located, the proportion of the reflective film splitting light toward the center of the light emitting area gradually increases.
- the light emitting effect of the backlight module is improved.
- the light is split through the reflective film, which is convenient for the miniaturization of the backlight module.
- 1 is a schematic structural diagram of a display device
- FIG. 2 is a schematic structural diagram of a display surface of a display device
- FIG. 3 is a schematic structural diagram of a backlight module provided by an embodiment of the present application.
- FIG. 4 is a schematic structural diagram of an LED light source array provided by an embodiment of the present application.
- FIG. 5 is a schematic structural diagram of a light source device provided by an embodiment of the present application.
- FIG. 6 is a schematic diagram of the cooperation between the cone tip of the reflective film of the light source device and the center line of the light source device according to the embodiment of the present application;
- FIG. 7 is a schematic diagram of the cooperation between the center point of the light source element, the cone tip of the reflective film and the center point of the light emitting area provided by the embodiment of the present application;
- FIG. 8 is a schematic structural diagram of a light source device according to an embodiment of the present application.
- FIG. 9 is a schematic structural diagram of another light source device provided by an embodiment of the present application.
- FIG. 10 is a schematic structural diagram of another light source device according to an embodiment of the present application.
- the backlight module is used in a display device to provide the display device with light for display.
- the display device includes a backlight module 1 , a polarizing plate 2 , a driving control circuit 3 , a display layer 4 , a color filter plate 5 and the like.
- the backlight module 1 provides a uniform white light surface light source for the display device
- the polarizing plate 2 adjusts the polarization state of the light emitted by the backlight module to a specific linear polarization state
- the driving control circuit 3 controls the voltage signal to control the liquid crystal in the display layer 4.
- the deflection of the material molecules changes the polarization direction of the incident light
- the color filter plate 5 changes the light color of the pixel point.
- FIG. 2 shows a schematic structural diagram of a display surface of a display device.
- the display layer 10 can be divided into different display areas according to the displayed images.
- each pixel is used as a display area 11 , or a display area 11 is formed by a plurality of pixels.
- the array arrangement of the plurality of display areas 11 is illustrated, but it should be understood that the example in FIG. 2 is only a specific example of division of the display area 11 , and the display area can be divided into different areas according to the displayed image. .
- different display areas 11 require different light rays.
- the embodiment of the present application provides a backlight module to provide a contrast effect of the image area of the display device . It will be described in detail below with reference to the specific drawings and embodiments.
- FIG. 3 shows a schematic structural diagram of a backlight module provided by an embodiment of the present application.
- the backlight module provided by the embodiment of the present application is a direct type backlight module, which includes a substrate 20, an LED (Light Emitting Diode, light emitting diode) light source array 30, a diffusion film 40, a prism brightness enhancement film 50 and other components.
- the diffusion film 40 is closer to the light source array 30 than the prism brightness enhancement film 50 .
- the substrate 20 is used to carry the LED light source array 30 and supply power to the LED light source array 30 .
- the LED light source array 30 is used to provide light to the display layer 10 so as to make it emit light for display.
- the diffusion film 40 further realizes the uniformity of light and improves the light mixing effect.
- the prismatic brightness enhancement film 50 enhances the forward brightness of light (the forward direction refers to the direction in which the backlight module points to the display layer 10 ), so as to provide the display layer 10 with a uniform white surface light source.
- the diffusion film 40 and the prismatic brightness enhancement film 50 are optional film layers, and the backlight module provided by the embodiment of the present application can selectively set the diffusion film 40 or the prismatic enhancement film according to the needs of light mixing.
- Bright film 50 can selectively set the diffusion film 40 or the prismatic enhancement film according to the needs of light mixing.
- Bright film 50 can selectively set the diffusion film 40 or the prismatic enhancement film according to the needs of light mixing.
- Bright film 50 can be selected for the backlight module as required, which will not be listed one by one in the embodiments of the present application.
- FIG. 4 shows a schematic structural diagram of an LED light source array.
- the backlight module is also divided into regions.
- the substrate 20 can be divided into a plurality of light-emitting regions 21, and the plurality of light-emitting regions 21 are arranged in an array in one-to-one correspondence with the display regions of the display screen, so as to provide each display region with correspondingly required light.
- each light source assembly includes a plurality of light source elements 31, and in the embodiment of the present application, the plurality of light source elements 31 are arranged in an array manner. The following takes one of the light source assemblies as an example for description.
- the light source assembly includes a plurality of light source elements 31 arranged in an array.
- the light emitting direction of the light source element 31 is adjusted according to the position of the light source element 31 .
- the light source 31 located at the edge of the light-emitting area 21 emits light to the inside of the light-emitting area 21 .
- the direction shown by the straight line is the light-emitting direction corresponding to the light source element 31 .
- the number of straight lines represents the amount of light emitted.
- the light source element 31 in the middle position emits light around, and the light source element 31 located at the edge of the light emitting area 21 emits light along the edge of the light emitting area 21 and toward the interior of the light emitting area 21 .
- the light source elements 31 located at the edge of the light emitting area 21 reduce or do not emit light toward the adjacent light emitting area 21 , so as to reduce the light crosstalk between the two light emitting areas 21 .
- FIG. 5 shows a schematic structural diagram of a light source device.
- Each light source device includes a light emitting unit 311 and a corresponding reflective film 313 .
- the light-emitting unit 311 is a flip-chip LED lamp bead, and the two bonding pads 312 of the flip-chip LED lamp bead are respectively located at the bottom of the LED lamp bead and connected to the circuit layer of the substrate.
- the bonding pad 312 does not occupy the top light-emitting surface of the light-emitting unit 311 , thereby increasing the light-emitting area of the light-emitting unit 311 .
- the light-emitting unit 311 provided in this embodiment of the present application may also adopt other types of light-emitting structures, which are not specifically limited in this application.
- the reflective film 313 is used for splitting the light emitted by the light-emitting unit 311. Combined with the above-mentioned structure of the light-emitting unit 311, when the reflective film 313 is provided, the reflective film 313 faces the top light-emitting surface of the light-emitting unit 311, and is used for the light-emitting surface of the light-emitting unit 311. The top light is split. When the light-emitting unit 311 is split, the reflective film 313 has a surface inclined relative to the top light-emitting surface of the light-emitting unit 311 , so that the light emitted from the top can be reflected by the reflective film 313 in a desired direction. As shown by the straight arrow in FIG.
- the light emitted from the top light-emitting surface is reflected by the reflective film 313 and then reflected to the surroundings.
- the light emitted by the point light source is diffused through the lens. It can be seen that the lens in the prior art requires a larger thickness to ensure the divergence effect, while in the present application The light emitted by the light source is reflected by the reflective film to achieve the effect of light divergence, which can greatly reduce the thickness of the light source.
- the reflective film 313 is a tapered surface
- the cone tip of the reflective film 313 faces the top light-emitting surface of the corresponding light-emitting unit 311, and the light emitted by the top light-emitting surface can be reflected by the tapered surface and then emitted.
- the conical surface is a conical surface, a triangular pyramid surface, a quadrangular pyramid surface and other different conical surfaces.
- Different shapes of the reflective film 313 can be selected according to requirements during specific setting, which is not specifically limited in the embodiments of the present application.
- the light source components located at the center of the light-emitting area emit light evenly around the light-emitting area
- the light source components located at the edges emit light into the light-emitting area.
- the direction in which the reflected light is emitted is controlled by adjusting the shape of the reflective film 313 .
- the proportion of the reflective film 313 to split light toward the center of the light-emitting area gradually increases.
- the light source components farther away from the center of the light emitting area may have a larger amount of light scattered toward the center of the light emitting area, and a smaller amount of light scattered toward other areas.
- the center line of the light emitting unit 311 refers to a straight line passing through the center of the light emitting unit in the thickness direction of the substrate.
- the center line of the light-emitting unit 311 is also the center line of the light source device.
- the center line of the light-emitting region refers to a straight line passing through the center of the light-emitting region in the thickness direction of the substrate.
- d and D are defined, where d is the first distance between a straight line running through the substrate along the thickness direction of the substrate where the cone tip of the reflective film is located and the center line of the light-emitting region .
- D is the second distance between the center line of the light-emitting unit corresponding to the reflective film and the center line of the light-emitting area.
- the five light source elements shown in FIG. 6 are a row of light source elements in the middle of a light-emitting area 21 shown in FIG. 4 .
- the five light source elements are named as the first light source element 32 , the second light source element 33 , the third light source element 34 , the fourth light source element 35 and the fifth light source element 36 respectively.
- the first light source element 32 is located at the center point of the light emitting area, and along the direction away from the center point of the light emitting area, the second light source element 33 and the third light source element 34 are arranged on one side of the first light source element 32, and the fourth light source element 35 and The fifth light source element 36 is arranged on the other side of the first light source element 32 .
- the distance between the second light source element 33 and the fourth light source element 35 from the center point of the light emitting area is D1
- the distance between the third light source element 34 and the fifth light source element 36 from the center point of the light emitting area is D2, wherein D2>D1.
- the above distance from the light source element to the center point of the light emitting area refers to the minimum distance from the center line of the light source element to the center point of the light emitting area.
- the cone tip of the first light source part 32 is located on the center line L1 of the first light source part 32, and the center line L1 passes through the center point of the light emitting area.
- the distance from the substrate is d1
- the straight line running through the substrate along the thickness direction of the substrate where the cone tip O2 of the third light source element 34 is located and the center line L3 of the third light source element 34 (the center line L3 is also along the The distance in the thickness direction of the substrate through the substrate) is d2.
- the first distance D3 when arranging the light-emitting unit and the reflective film of each light source element, the first distance D3 must be greater than the second distance D1 (taking the second light source element 33 as an example, the first distance is D3, and the second distance is D3). for D1).
- the first distance D3 is the distance between the straight line running through the substrate along the thickness direction of the substrate and the center line of the light-emitting area where the cone tip of the reflective film is located;
- the straight line that runs through the corresponding light-emitting unit along the thickness direction of the substrate where the cone tip is located divides the reflected light into different directions.
- the light emitted by the light emitting unit is reflected toward the center of the light emitting area.
- a part of the cone surface located at the tip of the cone away from the center of the light-emitting area can reflect the light emitted by the light-emitting unit to a position away from the center of the light-emitting area.
- the light source elements far away from the center point of the light emitting area will be more Light is reflected to the center in the glowing area.
- the straight line with the cone tip passing through the corresponding light-emitting unit along the thickness direction of the substrate is located at the edge of the light source component, so that the The emitted light is emitted toward the central area of the light-emitting area, minimizing the light emitted to the adjacent light-emitting area.
- point O3 is the center point of the light-emitting area
- point O4 represents the center line of each light source element 31
- point O5 is the cone tip of the reflective film of each light source element 31 . It can be seen from the top view in FIG. 7 that the points O3, O4 and O5 are located on the same straight line.
- the connecting line between the projection of the cone tip of the reflective film on the first plane and the projection of the center of the light-emitting area on the first plane is the first connecting line
- the center line of the light-emitting unit corresponding to the reflective film is the same as the The first connecting line intersects; it is worth noting that the first plane refers to a plane parallel to the upper surface or lower surface of the substrate, the upper surface of the substrate refers to the surface provided with the light source component, and the lower surface of the substrate is connected to the substrate.
- the upper surfaces of the bases face away from each other. As can be seen from FIG.
- the projection of the cone tip O5 of the reflective film on the first plane is similar to that of the first plane.
- the distance from the projection of the center point O3 of the light emitting area on the first plane is farther, so that the light emitting area of the light source element 31 faces the edge of the light emitting area or Towards the light-emitting area, it avoids the light from spreading into the adjacent light-emitting area.
- the backlight modules provided by the embodiments of the present application are arranged in the light-emitting area according to design requirements by using light sources with different light-emitting directions:
- the light source element emits light into the light-emitting area, which not only realizes uniform light mixing but also suppresses the crosstalk of light between the light-emitting areas.
- FIG. 8 shows a schematic structural diagram of a light source device 31 provided in an embodiment of the present application.
- the light source element 31 includes a light emitting unit 311 and a reflective film 313 .
- the reflective film 313 is connected to the light-emitting unit 311 , the reflective film 313 is bonded and connected to the top light-emitting surface of the light-emitting unit 311 through the first optical adhesive layer 314 .
- the first optical adhesive layer 314 is a transparent adhesive layer, so as to ensure that the light from the top light-emitting surface of the light-emitting unit 311 can pass through the first optical adhesive layer.
- the light source element 31 further includes a flat layer 315 covering the reflective film 313, so that the top of the light source element 31 forms a flat plane, which is convenient for passing through the grabbing device after the production is completed. grab.
- the flat layer 315 can be a second optical adhesive layer
- the reflective film 313 can be a coating layer coated between the first optical adhesive layer and the second optical adhesive layer.
- the coating may be a coating with high reflection effect, such as an aluminum coating or a silver coating.
- the LED process is firstly fabricated on the sapphire substrate to form the light-emitting unit, and then the transparent glue 314 is formed on the light-emitting unit 311 .
- a microstructure is fabricated on the transparent glue 314, and the shape of the microstructure corresponds to the shape of the reflective film 313, such as a cone.
- reflective metal Al or Ag
- a flat layer is made, and the outermost surface of the flat layer is smoothed, so as to facilitate the grabbing device to grab the light source parts.
- FIG. 9 illustrates a schematic structural diagram of another light source device 31 .
- the light source device 31 includes a light emitting unit 311 , a first optical adhesive layer 314 and a flat layer 315 .
- the first optical adhesive layer 314 is formed to be connected to the top light-emitting surface of the light-emitting unit 311 .
- Tapered holes corresponding to the formation of the reflective film are formed on the first optical adhesive layer 314 .
- the flat layer 315 fills the tapered holes.
- the flat layer 315 is made of reflective white glue, and the reflective white glue can reflect light. Therefore, the surface of the flat layer 315 in contact with the first optical adhesive layer 314 can be used as a reflective film, thereby simplifying the structure of the light source 31 , and the above reflective film can be formed when the flat layer 315 is formed.
- FIG. 10 is a modification based on the light source device shown in FIG. 8 or FIG. 9 .
- a light-transmitting hole 3131 is added on the basis of the reflective film 313 shown in FIG. 8 or FIG. 9 .
- the reflective film 313 is a coating layer coated on the first optical adhesive layer 314 and the flat layer 315 is a second optical adhesive layer
- the light-transmitting hole 3131 can be a hole opened on the coating layer.
- the reflective film 313 is one side of the reflective white glue
- the light-transmitting hole 3131 is a through-hole pierced through the flat layer 315.
- the light-transmitting hole 3131 is also a light-splitting method of the reflective film 313 . The light can be split in different directions through the reflective film 313 .
- the plurality of light-transmitting holes 3131 may be uniformly arranged on the reflective film 313 , or may be arranged on the reflective film 313 according to other arrangements according to the needs of light mixing.
- the embodiment of the present application further provides a display screen, the display screen includes any one of the above-mentioned backlight module and a liquid crystal layer stacked with the backlight module.
- the reflective film is used for light splitting, and along the direction from the center to the edge of the light-emitting area where the light source is located, the proportion of the light-splitting film toward the center of the light-emitting area gradually increases.
- the light emitting effect of the backlight module is improved.
- the light is split through the reflective film, which is convenient for the miniaturization of the backlight module.
- the embodiment of the present application further provides a display device, the display device includes any one of the above-mentioned backlight module and a liquid crystal layer stacked with the backlight module.
- the reflective film is used for light splitting, and along the direction from the center to the edge of the light-emitting area where the light source is located, the proportion of the light-splitting film toward the center of the light-emitting area gradually increases.
- the light emitting effect of the backlight module is improved.
- the light is split through the reflective film, which is convenient for the miniaturization of the backlight module.
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Abstract
Description
Claims (12)
- 一种背光模组,其特征在于,包括衬底以及多个光源组件;其中,所述衬底具有阵列排列的多个发光区域;所述多个光源组件一一对应设置在所述多个发光区域;每个光源组件包括阵列排列的多个光源件,每个光源件包括发光单元以及用于对所述发光单元发射的光线进行分光的反射膜;沿所述光源件所在发光区域的中心到边缘的方向,所述反射膜向所述发光区域的中心方向分光的比例逐渐增大。
- 如权利要求1所述的背光模组,其特征在于,所述反射膜位于对应的所述发光单元的出光侧,所述反射膜朝向所述发光单元的顶部出光面,并用于对所述发光单元的顶部出光进行分光。
- 如权利要求2所述的背光模组,其特征在于,所述反射膜为锥形面;所述反射膜的锥尖朝向对应的发光单元的顶部出光面;且沿远离所述发光区域的中心的方向,所述反射膜的锥尖所在的沿所述衬底的厚度方向贯穿所述衬底的直线与对应的发光单元的中心线的距离逐渐增大,所述发光单元的中心线是指沿所述衬底的厚度方向贯穿所述发光单元的中心的直线。
- 如权利要求3所述的背光模组,其特征在于,所述反射膜的锥尖所在的沿所述衬底的厚度方向贯穿所述衬底的直线与所述发光区域的中心线之间的距离为第一距离,所述反射膜对应的所述发光单元的中心线与所述发光区域的中心线之间的距离为第二距离,则所述第一距离大于所述第二距离;其中,所述发光区域的中心线是指沿所述衬底的厚度方向贯穿所述发光区域的中心的直线。
- 如权利要求3或4所述的背光模组,其特征在于,所述反射膜的锥尖在第一平面内的投影与所述发光区域的中心在所述第一平面内的投影之间的连接线为第一连接线;所述反射膜对应的发光单元的中心线与所述第一连接线相交,所述第一平面平行于所述衬底的表面。
- 如权利要求1~5任一项所述的背光模组,其特征在于,所述反射膜上设置有多个通光孔。
- 如权利要求6所述的背光模组,其特征在于,所述多个通光孔均匀排布在所述反射膜。
- 如权利要求1~7任一项所述的背光模组,其特征在于,所述反射膜通过透明胶与所述发光单元的顶部出光面粘接连接。
- 如权利要求1~8任一项所述的背光模组,其特征在于,每个光源件还包括覆盖所述反射膜的平坦层。
- 如权利要求1~10任一项所述的背光模组,其特征在于,所述背光模组还包括扩散膜和棱镜增亮膜;所述扩散膜和所述棱镜增亮膜层叠设置;所述扩散膜相对于所述棱镜增亮膜更靠近所述多个光源组件。
- 如权利要求1~10任一项所述的背光模组,其特征在于,每个发光区域与显示屏的显示层显示区域一一对应。
- 一种显示屏,其特征在于,包括如权利要求1~10任一项所述的背光模组以及与所述背光模组层叠设置的液晶层。
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JP2023532468A JP2023552154A (ja) | 2020-11-30 | 2021-11-29 | バックライトモジュール及びディスプレイ画面 |
EP21897179.4A EP4231088A4 (en) | 2020-11-30 | 2021-11-29 | BACKLIGHT MODULE AND DISPLAY SCREEN |
KR1020237020113A KR20230101916A (ko) | 2020-11-30 | 2021-11-29 | 백라이트 모듈 및 디스플레이 스크린 |
US18/324,522 US11914247B2 (en) | 2020-11-30 | 2023-05-26 | Backlight module and display screen |
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CN202011384672.9A CN114578614A (zh) | 2020-11-30 | 2020-11-30 | 一种背光模组及显示屏 |
CN202011384672.9 | 2020-11-30 |
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US18/324,522 Continuation US11914247B2 (en) | 2020-11-30 | 2023-05-26 | Backlight module and display screen |
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WO2022111679A1 true WO2022111679A1 (zh) | 2022-06-02 |
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EP (1) | EP4231088A4 (zh) |
JP (1) | JP2023552154A (zh) |
KR (1) | KR20230101916A (zh) |
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CN114967238A (zh) * | 2022-07-26 | 2022-08-30 | 惠科股份有限公司 | 显示装置和背光模组及其控制方法 |
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CN115407561A (zh) * | 2022-09-22 | 2022-11-29 | 上海天马微电子有限公司 | 分光膜、背光模组及显示装置 |
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Also Published As
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KR20230101916A (ko) | 2023-07-06 |
US20230305332A1 (en) | 2023-09-28 |
JP2023552154A (ja) | 2023-12-14 |
EP4231088A4 (en) | 2024-04-17 |
CN114578614A (zh) | 2022-06-03 |
US11914247B2 (en) | 2024-02-27 |
EP4231088A1 (en) | 2023-08-23 |
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