WO2021036116A1 - 背光模组及车载显示装置 - Google Patents

背光模组及车载显示装置 Download PDF

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Publication number
WO2021036116A1
WO2021036116A1 PCT/CN2019/126833 CN2019126833W WO2021036116A1 WO 2021036116 A1 WO2021036116 A1 WO 2021036116A1 CN 2019126833 W CN2019126833 W CN 2019126833W WO 2021036116 A1 WO2021036116 A1 WO 2021036116A1
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WO
WIPO (PCT)
Prior art keywords
light
board
backlight module
circuit board
back plate
Prior art date
Application number
PCT/CN2019/126833
Other languages
English (en)
French (fr)
Inventor
金福报
Original Assignee
武汉华星光电技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 武汉华星光电技术有限公司 filed Critical 武汉华星光电技术有限公司
Priority to US16/753,777 priority Critical patent/US11016339B2/en
Publication of WO2021036116A1 publication Critical patent/WO2021036116A1/zh

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Classifications

    • 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
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Definitions

  • the present invention relates to the field of display technology, in particular to a backlight module and a vehicle-mounted display device.
  • the on-board display screen can broadcast and interact with a large amount of information intuitively and effectively by means of video image screen playback.
  • the backlight source and the diffuser of the vehicle-mounted liquid crystal display device are separated by a sealant to form a certain distance of light mixing gap.
  • a sealant due to the hard material of the sealant, it is not conducive to adjusting the light mixing distance between the backlight and the diffuser.
  • the ratio of the thickness of the diffuser plate is likely to cause the problem of "gypsophila" light shadows, which affects the display effect of the display device, and the cost of the plastic frame is high and the production process is complicated, which is not conducive to actual production.
  • the existing vehicle-mounted display device has the problem that the light mixing distance is not easy to adjust, resulting in poor display effect. Therefore, it is necessary to provide a backlight module and a vehicle-mounted display device to improve this defect.
  • the embodiments of the present disclosure provide a backlight module and a vehicle-mounted display device, which are used to solve the problem of poor display effect due to the difficulty of adjusting the light mixing distance of the existing vehicle-mounted display device.
  • a backlight module including:
  • a light board, the light board is arranged on the back plate;
  • a diffuser plate, the diffuser plate is arranged on the side of the light plate away from the back plate;
  • the support layer is arranged between the light board and the diffuser plate, and is used to support the diffuser board and separate the light board and the diffuser board to form a light mixing space.
  • the light board includes a circuit board and a plurality of micro light emitting diodes arranged in an array on the circuit board, and the support layer is disposed on the edge of the circuit board.
  • a groove is provided on one side of the support layer close to the light board, and an accommodating space is formed between the groove and the light board.
  • the circuit board is provided with a gold finger end in a portion located in the accommodating space, the circuits of the circuit board are all connected to the gold finger end, and the backlight module further includes a flexible circuit
  • the flexible circuit board extends into the accommodating space through the opening provided on the back plate, and is bound and connected with the golden finger end.
  • the circuit board is provided with a connector in a portion located in the accommodating space, the circuits of the light board are all connected to the connector, and the backlight module further includes a flexible circuit board, The flexible circuit board extends to the accommodating space through the opening provided on the back plate, and is inserted into the connector.
  • the backlight module further includes a plastic frame, which is bent from the outer side of the back plate to the inner side of the back plate, and is configured to support the display panel.
  • the backlight module further includes a first prism sheet and a second prism sheet stacked on the diffuser plate, and the second prism sheet and the second prism sheet are bent to the inner side of the back plate.
  • a gap is formed between the frame glue.
  • the thickness of the gap ranges from 0.2 mm to 0.3 mm.
  • the material of the support layer includes rubber.
  • the embodiments of the present disclosure also provide a vehicle-mounted display device, including a backlight module, and the backlight module includes:
  • a light board, the light board is arranged on the back plate;
  • a diffuser plate, the diffuser plate is arranged on the side of the light plate away from the back plate;
  • the support layer is arranged between the light board and the diffuser plate, and is used to support the diffuser board and separate the light board and the diffuser board to form a light mixing space.
  • the light board includes a circuit board and a plurality of micro light emitting diodes arranged in an array on the circuit board, and the support layer is disposed on the edge of the circuit board.
  • a groove is provided on one side of the support layer close to the light board, and an accommodating space is formed between the groove and the light board.
  • the circuit board is provided with a gold finger end in a portion located in the accommodating space, the circuits of the circuit board are all connected to the gold finger end, and the backlight module further includes a flexible circuit
  • the flexible circuit board extends into the accommodating space through the opening provided on the back plate, and is bound and connected with the golden finger end.
  • the circuit board is provided with a connector in a portion located in the accommodating space, the circuits of the light board are all connected to the connector, and the backlight module further includes a flexible circuit board, The flexible circuit board extends to the accommodating space through the opening provided on the back plate, and is inserted into the connector.
  • the backlight module further includes a plastic frame, which is bent from the outer side of the back plate to the inner side of the back plate, and is configured to support the display panel.
  • the backlight module further includes a first prism sheet and a second prism sheet stacked on the diffuser plate, and the second prism sheet and the second prism sheet are bent to the inner side of the back plate.
  • a gap is formed between the frame glue.
  • the thickness of the gap ranges from 0.2 mm to 0.3 mm.
  • the material of the support layer includes rubber.
  • the embodiments of the present disclosure also provide a vehicle-mounted display device, including a backlight module, and the backlight module includes:
  • a light board, the light board is arranged on the back plate;
  • a diffuser plate, the diffuser plate is arranged on the side of the light plate away from the back plate;
  • a support layer is arranged between the light board and the diffuser plate, used to support the diffuser board, and separate the light board and the diffuser board to form a light mixing space;
  • the light board includes a circuit board and a plurality of micro light-emitting diodes arranged in an array on the circuit board, and a groove is provided on one side of the support layer close to the light board. An accommodating space is formed between the light boards.
  • the circuit board is provided with a gold finger end in a portion located in the accommodating space, the circuits of the circuit board are all connected to the gold finger end, and the backlight module further includes a flexible circuit
  • the flexible circuit board extends into the accommodating space through the opening provided on the back plate, and is bound and connected with the golden finger end.
  • a support layer is provided between the diffuser plate of the backlight module and the light plate, and the support layer is used to support the diffuser plate and separate the light plate and the light plate.
  • the diffuser is used to form a light mixing space.
  • FIG. 1 is a schematic diagram of a cross-sectional structure of a backlight module provided in the first embodiment of the disclosure
  • FIG. 2 is a schematic diagram of the planar structure of the backlight module provided in the first embodiment of the disclosure
  • FIG. 3 is a schematic diagram of a cross-sectional structure of the backlight module provided in the second embodiment of the disclosure.
  • FIG. 4 is a schematic diagram of the planar structure of the backlight module provided in the second embodiment of the disclosure.
  • the embodiments of the present disclosure provide a backlight module, which will be described in detail below with reference to FIGS. 1 to 2.
  • FIG. 1 is a schematic cross-sectional structure diagram of a backlight module 100 provided by an embodiment of the disclosure.
  • the backlight module 100 includes a back plate 110, a lamp plate 120, and a support layer 130.
  • the lamp plate 120 is thermally conductive.
  • Adhesive tape is attached to the back plate 110, the diffuser plate 130 is disposed on the side of the light plate 120 away from the back plate 110, and the bracket layer 140 is disposed on the light plate 120 and the diffuser Between the plates 130, they are used to support the diffuser 130 and separate the light board 120 and the diffuser 130 to form a light mixing space 141.
  • Two adjacent two of the light board 120 and the diffuser 130 The space between the two surfaces is the light mixing space 141, and the light emitted by the light board 120 as a light source directly forms a surface light source in the light mixing space 141.
  • the light board 120 includes a circuit board 121 and a micro light emitting diode 122.
  • FIG. 2 is a schematic plan view of a backlight module 100 provided by an embodiment of the present disclosure.
  • the micro light emitting diode 122 is arranged in an array
  • the support layer 140 is disposed on the peripheral edge of the circuit board 122 and surrounds the plurality of micro light emitting diodes 121 arranged in an array.
  • the material of the support layer 140 includes rubber. Compared with the original rubber frame, the rubber material is softer. Therefore, the thickness of the support layer 140 using rubber as a raw material can be adjusted by pressing and so on.
  • the thickness of the support layer 140 is the distance of the light mixing space 141. The distance is adjusted to a suitable ratio with the diffuser 130, so that the light emitted by the micro-light emitting diode 122 reaches the display panel 200 more evenly, thereby effectively optimizing the problem of "gypsophila" lighting and improving the backlight module 100 and the display panel 200 display effect.
  • the manufacturing cost of rubber is lower than that of the plastic frame, and the manufacturing process of rubber is simpler than that of the plastic frame. Therefore, replacing the original plastic frame with the bracket layer 140 formed by rubber can simplify the production process and reduce production. cost.
  • the bracket layer 140 is provided with a groove on one side close to the light board 121, and an accommodation space is formed between the groove and the light board 121.
  • the circuit board 121 is provided with a golden finger end (not shown in the figure) in a portion located in the accommodating space, the circuits of the circuit board 121 are all connected to the golden finger end, and the backlight module 100 further includes a flexible A circuit board 180, the flexible circuit board 180 extends into the accommodating space through an opening provided on the backplane 110, and is bound and connected with the golden finger end.
  • the support layer 140 By arranging the position where the flexible circuit board 180 and the gold finger end are bound and connected in the accommodating space formed by the support layer 140 and the circuit board 120, the space originally occupied by the gold finger end can be saved, and the support layer 140 can be reduced in size.
  • the width in the planar structure further reduces the width of the lower frame of the backlight module 100, which effectively increases the screen-to-body ratio of the vehicle-mounted display device.
  • the support layer 140 is divided into a plurality of interconnected parts, corresponding to the four peripheries of the circuit board 121 respectively.
  • the first part 141 and the second part 142 connected to each other are shown.
  • the first part 141 and the second part 142 are both arranged in a long strip shape, and the first part 141 is arranged in an L shape at the part connected to the second part 142, and one end of the second part 142 is connected to the The L-shaped grooves cooperate and overlap each other to effectively improve the stability of the support layer 140 and improve the reliability of the reliability test.
  • the connection of other parts of the support layer 140 can also refer to the connection mode of the first part 141 and the second part 142.
  • multiple parts of the support layer 140 can also be designed to be connected in other mating ways. In this way, of course, the support layer 140 can also be designed as a whole according to actual requirements.
  • the number of gold finger ends set on the circuit board 121 may be multiple.
  • all The golden finger ends of the circuit board 121 can all be arranged on one side edge of the circuit board 121.
  • the golden finger ends can be arranged on the opposite upper and lower or left and right edges of the circuit board 121.
  • the bracket layers 140 on both sides need to form corresponding grooves to avoid the gap between the golden finger end and the flexible circuit board.
  • the backlight module 100 further includes a plastic frame 160, which is bent from the outer side of the back plate 110 to the inner side of the back plate 110, and is configured It is configured to support the display panel 200, and a foam glue 170 is arranged between the plastic frame 160 and the display panel 200 to protect the display panel 200.
  • the display panel 200 includes a first polarizer 210, an array substrate 220, a color filter substrate 230, and a second polarizer 240 stacked in sequence.
  • the backlight module 100 further includes a first prism sheet 150 and a second prism sheet 151 stacked on the diffusion plate 130, the first prism sheet 150 and the second prism sheet 151 151 has the same size.
  • a gap 161 is formed between the second prism sheet 152 and the sealant 160 bent to the inner side of the back plate 110. The gap 161 is used to provide the prism sheet in the reliability test. Reserve a certain amount of expansion and expansion space to prevent poor display due to warping of the prism sheet.
  • the thickness of the gap 161 ranges from 0.2 mm to 0.3 mm.
  • a support layer 140 is provided between the diffuser 130 and the light board 120 of the backlight module 100.
  • the support layer 140 is used to support the diffuser 130 and separate the light board 120 from the light board 120.
  • the diffuser 130 forms the light mixing space 141.
  • the embodiments of the present disclosure provide a backlight module, which will be described in detail below with reference to FIGS. 3 to 4.
  • FIG. 3 is a schematic cross-sectional structure diagram of a backlight module 300 provided by an embodiment of the disclosure.
  • the backlight module 300 includes a back plate 310, a light plate 320, and a support layer 330.
  • the light plate 320 is thermally conductive.
  • Adhesive tape is attached to the back plate 310, the diffuser plate 330 is disposed on the side of the light plate 320 away from the back plate 310, and the bracket layer 340 is disposed on the light plate 320 and the diffuser Between the plates 330, they are used to support the diffuser 330 and separate the light board 320 and the diffuser 330 to form a light mixing space 341.
  • the two adjacent light boards 320 and the diffuser 330 The gap between the two surfaces is the light mixing space 341, and the light emitted by the light board 320 as a light source directly forms a surface light source in the light mixing space 341.
  • the light board 320 includes a circuit board 321 and a micro light emitting diode 322.
  • FIG. 4 is a schematic diagram of a plan structure of a backlight module 200 provided by an embodiment of the present disclosure. In FIG. 4, only a part of the micro light emitting diodes 322 and a part of the support layer 340 are shown.
  • the support layer 340 is disposed on the peripheral edge of the circuit board 322 and surrounds the plurality of micro light emitting diodes 321 arranged in an array.
  • the material of the support layer 340 includes rubber. Compared with the original rubber frame material, the rubber material is softer. Therefore, the thickness of the support layer 340 made of rubber can be adjusted directly by pressing or other methods.
  • the thickness of the support layer 340 is the distance of the light mixing space 341.
  • the distance is adjusted to the appropriate ratio of the diffuser plate 330, so that the light emitted by the micro light emitting diode 322 reaches the display panel 300 more evenly, thereby effectively optimizing the problem of "sky-filled stars" lighting and improving the backlight module 300 and the display panel 400 display effect.
  • the manufacturing cost of rubber is lower than that of the plastic frame, and the manufacturing process of rubber is simpler than that of the plastic frame. Therefore, replacing the original plastic frame with the bracket layer 340 formed by rubber can simplify the production process and reduce production. cost.
  • the bracket layer 340 is provided with a groove on one side close to the light board 321, and an accommodation space is formed between the groove and the light board 321.
  • the circuit board 321 is provided with a connector 323 in the portion of the accommodating space.
  • the lines of the light board 321 are all connected to the connector 323.
  • the backlight module 300 also includes a flexible circuit board 380.
  • the circuit board 380 extends to the accommodating space through the openings provided on the backplane 310 and is inserted into the connector 323.
  • the space originally occupied by the connector 323 can be saved, thereby reducing the width of the bracket layer 340 in the planar structure, thereby reducing the width of the lower frame of the backlight module 300, and effectively improving the vehicle The screen-to-body ratio of the display device.
  • the number of connectors 323 provided on the circuit board 321 may be multiple.
  • the circuit board 321 has fewer partitions, all The connectors 323 can be arranged on one side edge of the circuit board 321.
  • the connectors 323 can be arranged on the opposite upper and lower or left and right edges of the circuit board 321.
  • the bracket layers 340 on both sides need to form corresponding grooves to design the connector 323 and the flexible circuit board to avoid the gap.
  • the thickness of the connector 323 should be less than the sum of the thickness of the light mixing space 341 and the micro LED 322, and the distance between the edge of the connector 323 and the edge of the accommodating space should be greater than or equal to 0.5 mm to facilitate connection The assembly of the device 323 and the support layer 340.
  • the support layer 340 is divided into a plurality of parts connected to each other, corresponding to the four peripheries of the circuit board 321 respectively.
  • the first part 341 and the second part 342 connected to each other are shown.
  • the first part 341 is arranged in an L-shape at the part connected with the second part 342, and one end of the second part 342 is overlapped with the L-shaped groove, which effectively improves the stability of the support layer 340 , In order to improve the reliability of the reliability test.
  • the connection of other parts of the support layer 340 can also refer to the connection manner of the first part 341 and the second part 342.
  • multiple parts of the support layer 340 can also be designed to be connected in other ways. In this way, of course, the support layer 340 can also be designed as a whole according to actual requirements.
  • the backlight module 300 further includes a plastic frame 360 which is bent from the outer side of the back plate 310 to the inner side of the back plate 310, and is configured It is configured to support the display panel 400, and a foam glue 370 is arranged between the plastic frame 360 and the display panel 400 to protect the display panel 400.
  • the display panel 400 includes a first polarizer 410, an array substrate 420, a color filter substrate 430, and a second polarizer 440 stacked in sequence.
  • the backlight module 300 further includes a first prism sheet 350 and a second prism sheet 351 stacked on the diffusion plate 330, the first prism sheet 350 and the second prism sheet 351 351 has the same size.
  • a gap 361 is formed between the second prism sheet 352 and the sealant 360 bent to the inner side of the back plate 310. The gap 361 is used to provide the prism sheet in the reliability test. Reserve a certain amount of expansion and expansion space to prevent poor display due to warping of the prism sheet.
  • the thickness of the gap 361 ranges from 0.2 mm to 0.3 mm.
  • a support layer 340 is provided between the diffuser plate 330 and the light plate 320 of the backlight module 300.
  • the support layer 340 is used to support the diffuser plate 330 and separate the light plate 320 from the light plate 320.
  • the diffuser plate 330 forms the light mixing space 341.
  • the embodiments of the present disclosure also provide a vehicle-mounted display device, which includes the backlight module provided in the above-mentioned embodiment, and can achieve the same technical effects as the backlight module provided in the above-mentioned embodiment, which will not be repeated here.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)

Abstract

一种背光模组（100）及车载显示装置，背光模组（100）包括背板（110）、灯板（120）、扩散板（130）和支架层（140），支架层（140）设置于灯板（120）与扩散板（130）之间，用于支撑扩散板（130），并隔开灯板（120）与扩散板（130）以形成混光空间，通过调节支架层（140）的高度，可以调节控制扩散板（130）与灯板（120）之间形成的混光空间的距离，提高背光模组（100）以及车载显示装置的背光显示效果。

Description

背光模组及车载显示装置 技术领域
本发明涉及显示技术领域，尤其涉及一种背光模组及车载显示装置。
 背景技术
随着车辆和交通技术领域的发展，车辆在使用过程中所需承载的信息越来越多，驾驶员对信息交互的需求也原来越高。作为车辆信息载体的一种，车载显示屏可通过视频图像画面播放等方式，可直观有效地实现大量信息的传播与交互。
 技术问题
目前车载液晶显示装置的背光源与扩散板之间由框胶隔离以形成一定距离的混光间隙，但由于框胶的材质较硬，不利于调节背光源与扩散板之间的混光距离和扩散板厚度的配比，容易导致产生“满天星”灯影的问题，影响显示装置的显示效果，并且胶框的成本较高、生产工艺复杂，不利于实际生产。
综上所述，现有车载显示装置存在混光距离不易调节导致显示效果不佳的问题。故，有必要提供一种背光模组及车载显示装置来改善这一缺陷。
 技术解决方案
本揭示实施例提供一种背光模组及车载显示装置，用于解决现有车载显示装置存在的混光距离不易调节导致显示效果不佳的问题。
本揭示实施例提供一种背光模组，包括：
背板；
灯板，所述灯板设置于所述背板上；
扩散板，所述扩散板设置于所述灯板远离所述背板的一侧上；以及
支架层，所述支架层设置于所述灯板与所述扩散板之间，用于支撑所述扩散板，并隔开所述灯板与所述扩散板以形成混光空间。
根据本揭示一实施例，所述灯板包括电路板以及阵列排布于所述电路板上的多个微发光二极管，所述支架层设置于所述电路板的边缘。
根据本揭示一实施例，所述支架层靠近所述灯板的一侧设有凹槽，所述凹槽与所述灯板之间形成容置空间。
根据本揭示一实施例，所述电路板在位于所述容置空间的部分设有金手指端，所述电路板的线路均连接至所述金手指端，所述背光模组还包括柔性电路板，所述柔性电路板通过设置于所述背板上的开孔延伸至所述容置空间内，并与所述金手指端绑定连接。
根据本揭示一实施例，所述电路板在位于所述容置空间的部分设有连接器，所述灯板的线路均连接至所述连接器，所述背光模组还包括柔性电路板，所述柔性电路板通过设置于所述背板上的开孔延伸至所述容置空间，并与所述连接器插接。
根据本揭示一实施例，所述背光模组还包括胶框，所述胶框由所述背板外侧弯折至所述背板内侧，配置成用于支撑显示面板。
根据本揭示一实施例，所述背光模组还包括层叠设置于所述扩散板上的第一棱镜片和第二棱镜片，所述第二棱镜片与弯折至所述背板内侧的所述框胶之间形成间隙。
根据本揭示一实施例，所述间隙的厚度范围为0.2mm~0.3mm。
根据本揭示一实施例，所述支架层的材料包括橡胶。
本揭示实施例还提供一种车载显示装置，包括背光模组，所述背光模组包括：
背板；
灯板，所述灯板设置于所述背板上；
扩散板，所述扩散板设置于所述灯板远离所述背板的一侧上；以及
支架层，所述支架层设置于所述灯板与所述扩散板之间，用于支撑所述扩散板，并隔开所述灯板与所述扩散板以形成混光空间。
根据本揭示一实施例，所述灯板包括电路板以及阵列排布于所述电路板上的多个微发光二极管，所述支架层设置于所述电路板的边缘。
根据本揭示一实施例，所述支架层靠近所述灯板的一侧设有凹槽，所述凹槽与所述灯板之间形成容置空间。
根据本揭示一实施例，所述电路板在位于所述容置空间的部分设有金手指端，所述电路板的线路均连接至所述金手指端，所述背光模组还包括柔性电路板，所述柔性电路板通过设置于所述背板上的开孔延伸至所述容置空间内，并与所述金手指端绑定连接。
根据本揭示一实施例，所述电路板在位于所述容置空间的部分设有连接器，所述灯板的线路均连接至所述连接器，所述背光模组还包括柔性电路板，所述柔性电路板通过设置于所述背板上的开孔延伸至所述容置空间，并与所述连接器插接。
根据本揭示一实施例，所述背光模组还包括胶框，所述胶框由所述背板外侧弯折至所述背板内侧，配置成用于支撑显示面板。
根据本揭示一实施例，所述背光模组还包括层叠设置于所述扩散板上的第一棱镜片和第二棱镜片，所述第二棱镜片与弯折至所述背板内侧的所述框胶之间形成间隙。
根据本揭示一实施例，所述间隙的厚度范围为0.2mm~0.3mm。
根据本揭示一实施例，所述支架层的材料包括橡胶。
本揭示实施例还提供一种车载显示装置，包括背光模组，所述背光模组包括：
背板；
灯板，所述灯板设置于所述背板上；
扩散板，所述扩散板设置于所述灯板远离所述背板的一侧上；以及
支架层，所述支架层设置于所述灯板与所述扩散板之间，用于支撑所述扩散板，并隔开所述灯板与所述扩散板以形成混光空间；
其中，所述灯板包括电路板以及阵列排布于所述电路板上的多个微发光二极管，所述支架层靠近所述灯板的一侧设有凹槽，所述凹槽与所述灯板之间形成容置空间。
根据本揭示一实施例，所述电路板在位于所述容置空间的部分设有金手指端，所述电路板的线路均连接至所述金手指端，所述背光模组还包括柔性电路板，所述柔性电路板通过设置于所述背板上的开孔延伸至所述容置空间内，并与所述金手指端绑定连接。
 有益效果
本揭示实施例的有益效果：本揭示实施例通过在背光模组的扩散板与灯板之间设置支架层，所述支架层用于支撑所述扩散板，并隔开所述灯板与所述扩散板以形成混光空间，通过调节支架层的高度，可以方便地调节控制扩散板与灯板之间形成的混光空间的距离，从而优化“满天星”灯影的问题，提高背光模组以及车载显示装置的背光显示效果。
 附图说明
为了更清楚地说明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单介绍，显而易见地，下面描述中的附图仅仅是揭示的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本揭示实施例一提供的背光模组的截面结构示意图；
图2为本揭示实施例一提供的背光模组的平面结构示意图；
图3为本揭示实施例二提供的背光模组的截面结构示意图；
图4为本揭示实施例二提供的背光模组的平面结构示意图。
 本发明的实施方式
以下各实施例的说明是参考附加的图示，用以例示本申请可用以实施的特定实施例。本申请所提到的方向用语，例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本申请，而非用以限制本申请。在图中，结构相似的单元是用以相同标号表示。
下面结合附图和具体实施例对本揭示做进一步的说明：
实施例一：
本揭示实施例提供一种背光模组，下面结合图1至图2进行详细说明。
如图1所示，图1为本揭示实施例提供的背光模组100的截面结构示意图，所述背光模组100包括背板110、灯板120和支架层130，所述灯板120通过导热胶带贴附于所述背板110上，所述扩散板130设置于所述灯板120远离所述背板110的一侧上，所述支架层140设置于所述灯板120与所述扩散板130之间，用于支撑所述扩散板130，并隔开所述灯板120与所述扩散板130以形成混光空间141，所述灯板120与所述扩散板130相邻的两个表面之间的空隙即为所述混光空间141，所述灯板120作为光源发出的光线在所述混光空间141内直接形成面光源。
在本实施例中，所述灯板120包括电路板121和微发光二极管122。如图2所示，图2为本揭示实施例提供的背光模组100的平面结构示意图，图2中仅表示出部分微发光二极管122以及部分支架层140，所述微发光二极管122阵列排布于所述电路板121上，所述支架层140设置于所述电路板122的四周边缘，并包围所述阵列排布的多个微发光二极管121。
在本实施例中，所述支架层140的材料包括橡胶，相较于原本胶框的材质，橡胶材料较为柔软，因此可以通过按压等方式调整以橡胶为原材料的支架层140的厚度，直接调整混光空间141沿背光模组100厚度方向的距离，在本实施例所提供的背光模组100的结构中，支架层140的厚度即为混光空间141的距离，通过将混光空间141的距离调整到与所述扩散板130合适的配比，使得微发光二极管122发出的光线较为均匀的抵达显示面板200，从而有效优化“满天星”灯影的问题，提升背光模组100以及显示面板200的显示效果。同时，橡胶的制作成本低于胶框的制作成本，并且橡胶的制作工艺也较胶框的制作工艺简单，因此，用橡胶形成的支架层140代替原本的胶框，可以简化生产工艺，减少生产成本。
在本实施例中，如图1所示，所述支架层140靠近所述灯板121的一侧设有凹槽，所述凹槽与所述灯板121之间形成容置空间，所述电路板121在位于所述容置空间的部分设有金手指端（图中未示出），所述电路板121的线路均连接至所述金手指端，所述背光模组100还包括柔性电路板180，所述柔性电路板180通过设置于所述背板110上的开孔延伸至所述容置空间内，并与所述金手指端绑定连接。通过将柔性电路板180与金手指端绑定连接的位置设置于支架层140与电路板120形成的容置空间内，可以省去金手指端原本占据的空间，从而可以减小支架层140在平面结构中的宽度，进而减小背光模组100下边框的宽度，有效提升车载显示装置的屏占比。
如图2所示，所述支架层140分为相互连接的多个部分，分别对应于电路板121的四个周边，图2中仅展示出相互连接的第一部分141和第二部分142。其中，所述第一部分141和所述第二部分142均设置成长条状，且所述第一部分141在与第二部分142连接的部分设置成L型，所述第二部分142的一端与所述L型的凹槽相互配合搭接，有效提升支架层140的稳定性，以提高可靠性测试的可靠度。当然，所述支架层140其他部分的连接同样可以参考第一部分141和第二部分142的连接方式，在一些实施例中，所述支架层140的多个部分也可以设计成其他的配合连接的方式，当然所述支架层140也可以根据实际需求设计成为一个整体。
在一些实施例中，根据灯板120的电路板121上电路的复杂程度和分区情况，电路板121上的设置的金手指端数量可以为多个，对于电路板121上分区较少时，所有的金手指端可以都设置于电路板121的一侧边缘，对于电路复杂程度较高，分区较多的电路板，可以将金手指端设置于电路板121相对的上下或左右两侧的边缘，此时，对应两侧的支架层140均需要形成相应的凹槽对金手指端和柔性电路板进行避空设计。
在本实施例中，如图1所示，所述背光模组100还包括胶框160，所述胶框160由所述背板110的外侧弯折至所述背板110的内侧，配置成用于支撑显示面板200，所述胶框160与所述显示面板200之间设置有泡棉胶170，用于保护所述显示面板200。所述显示面板200包括依次层叠设置的第一偏光片210、阵列基板220、彩膜基板230和第二偏光片240。
在本实施例中，所述背光模组100还包括层叠设置于所述扩散板130上的第一棱镜片150和第二棱镜片151，所述第一棱镜片150与所述第二棱镜片151的尺寸相同，所述第二棱镜片152与弯折至所述背板110内侧的所述框胶160之间形成间隙161，所述间隙161用于在可靠性测试中，给上述棱镜片预留一定的膨胀扩展空间，防止由于棱镜片翘曲等导致的显示不良。
优选的，所述间隙161的厚度范围为0.2mm~0.3mm。
本揭示实施例通过在背光模组100的扩散板130与灯板120之间设置支架层140，所述支架层140用于支撑所述扩散板130，并隔开所述灯板120与所述扩散板130以形成混光空间141，通过调节支架层140的高度，可以方便地调节控制扩散板130与灯板120之间形成的混光空间141的距离，从而优化“满天星”灯影的问题，提高背光模组100背光显示效果。
实施例二：
本揭示实施例提供一种背光模组，下面结合图3至图4进行详细说明。
如图3所示，图3为本揭示实施例提供的背光模组300的截面结构示意图，所述背光模组300包括背板310、灯板320和支架层330，所述灯板320通过导热胶带贴附于所述背板310上，所述扩散板330设置于所述灯板320远离所述背板310的一侧上，所述支架层340设置于所述灯板320与所述扩散板330之间，用于支撑所述扩散板330，并隔开所述灯板320与所述扩散板330以形成混光空间341，所述灯板320与所述扩散板330相邻的两个表面之间的空隙即为所述混光空间341，所述灯板320作为光源发出的光线在所述混光空间341内直接形成面光源。
在本实施例中，所述灯板320包括电路板321和微发光二极管322。如图4所示，图4为本揭示实施例提供的背光模组200的平面结构示意图，图4中仅表示出部分微发光二极管322以及部分支架层340，所述微发光二极管322阵列排布于所述电路板321上，所述支架层340设置于所述电路板322的四周边缘，并包围所述阵列排布的多个微发光二极管321。
在本实施例中，所述支架层340的材料包括橡胶，相较于原本胶框的材质，橡胶材料较为柔软，因此可以通过按压等方式调整以橡胶为原材料的支架层340的厚度，直接调整混光空间341沿背光模组300厚度方向的距离，在本实施例所提供的背光模组300的结构中，支架层340的厚度即为混光空间341的距离，通过将混光空间341的距离调整到与所述扩散板330合适的配比，使得微发光二极管322发出的光线较为均匀的抵达显示面板300，从而有效优化“满天星”灯影的问题，提升背光模组300以及显示面板400的显示效果。同时，橡胶的制作成本低于胶框的制作成本，并且橡胶的制作工艺也较胶框的制作工艺简单，因此，用橡胶形成的支架层340代替原本的胶框，可以简化生产工艺，减少生产成本。
在本实施例中，如图3所示，所述支架层340靠近所述灯板321的一侧设有凹槽，所述凹槽与所述灯板321之间形成容置空间，所述电路板321在位于所述容置空间的部分设有连接器323，所述灯板321的线路均连接至所述连接器323，所述背光模组300还包括柔性电路板380，所述柔性电路板380通过设置于所述背板310上的开孔延伸至所述容置空间，并与所述连接器323插接。通过将连接器323容置空间内，可以省去连接器323原本占据的空间，从而可以减小支架层340在平面结构中的宽度，进而减小背光模组300下边框的宽度，有效提升车载显示装置的屏占比。
在一些实施例中，根据灯板320的电路板321上电路的复杂程度和分区情况，电路板321上的设置的连接器323数量可以为多个，对于电路板321上分区较少时，所有的连接器323可以都设置于电路板321的一侧边缘，对于电路复杂程度较高，分区较多的电路板，可以将连接器323设置于电路板321相对的上下或左右两侧的边缘，此时，对应两侧的支架层340均需要形成相应的凹槽对连接器323和柔性电路板进行避空设计。
优选的，所述连接器323的厚度应小于混光空间341和微发光二极管322的厚度之和，同时，连接器323的边缘与容置空间的边缘间隔应大于或等于0.5mm，以便于连接器323以及支架层340的装配。
如图4所示，所述支架层340分为相互连接的多个部分，分别对应于电路板321的四个周边，图4中仅展示出相互连接的第一部分341和第二部分342。其中，所述第一部分341在与第二部分342连接的部分设置成L型，所述第二部分342的一端与所述L型的凹槽相互配合搭接，有效提升支架层340的稳定性，以提高可靠性测试的可靠度。当然，所述支架层340其他部分的连接同样可以参考第一部分341和第二部分342的连接方式，在一些实施例中，所述支架层340的多个部分也可以设计成其他的配合连接的方式，当然所述支架层340也可以根据实际需求设计成为一个整体。
在本实施例中，如图3所示，所述背光模组300还包括胶框360，所述胶框360由所述背板310的外侧弯折至所述背板310的内侧，配置成用于支撑显示面板400，所述胶框360与所述显示面板400之间设置有泡棉胶370，用于保护所述显示面板400。所述显示面板400包括依次层叠设置的第一偏光片410、阵列基板420、彩膜基板430和第二偏光片440。
在本实施例中，所述背光模组300还包括层叠设置于所述扩散板330上的第一棱镜片350和第二棱镜片351，所述第一棱镜片350与所述第二棱镜片351的尺寸相同，所述第二棱镜片352与弯折至所述背板310内侧的所述框胶360之间形成间隙361，所述间隙361用于在可靠性测试中，给上述棱镜片预留一定的膨胀扩展空间，防止由于棱镜片翘曲等导致的显示不良。
优选的，所述间隙361的厚度范围为0.2mm~0.3mm。
本揭示实施例通过在背光模组300的扩散板330与灯板320之间设置支架层340，所述支架层340用于支撑所述扩散板330，并隔开所述灯板320与所述扩散板330以形成混光空间341，通过调节支架层340的高度，可以方便地调节控制扩散板330与灯板320之间形成的混光空间341的距离，从而优化“满天星”灯影的问题，提高背光模组300背光显示效果。
本揭示实施例还提供了一种车载显示装置，包括如上述实施例所提供的背光模组，且能够实现与上述实施例所提供的背光模组相同的技术效果，此处不再赘述。
综上所述，虽然本揭示以优选实施例揭露如上，但上述优选实施例并非用以限制本揭示，本领域的普通技术人员，在不脱离本揭示的精神和范围内，均可作各种更动与润饰，因此本揭示的保护范围以权利要求界定的范围为基准。

Claims (20)

  1. 一种的背光模组，包括：
    背板；
    灯板，所述灯板设置于所述背板上；
    扩散板，所述扩散板设置于所述灯板远离所述背板的一侧上；以及
    支架层，所述支架层设置于所述灯板与所述扩散板之间，用于支撑所述扩散板，并隔开所述灯板与所述扩散板以形成混光空间。
  2. 如权利要求1所述的背光模组，其中，所述灯板包括电路板以及阵列排布于所述电路板上的多个微发光二极管，所述支架层设置于所述电路板的边缘。
  3. 如权利要求2所述的背光模组，其中，所述支架层靠近所述灯板的一侧设有凹槽，所述凹槽与所述灯板之间形成容置空间。
  4. 如权利要求3所述的背光模组，其中，所述电路板在位于所述容置空间的部分设有金手指端，所述电路板的线路均连接至所述金手指端，所述背光模组还包括柔性电路板，所述柔性电路板通过设置于所述背板上的开孔延伸至所述容置空间内，并与所述金手指端绑定连接。
  5. 如权利要求3所述的背光模组，其中，所述电路板在位于所述容置空间的部分设有连接器，所述灯板的线路均连接至所述连接器，所述背光模组还包括柔性电路板，所述柔性电路板通过设置于所述背板上的开孔延伸至所述容置空间，并与所述连接器插接。
  6. 如权利要求1所述的背光模组，其中，所述背光模组还包括胶框，所述胶框由所述背板外侧弯折至所述背板内侧，配置成用于支撑显示面板。
  7. 如权利要求6所述的背光模组，其中，所述背光模组还包括层叠设置于所述扩散板上的第一棱镜片和第二棱镜片，所述第二棱镜片与弯折至所述背板内侧的所述框胶之间形成间隙。
  8. 如权利要求7所述的背光模组，其中，所述间隙的厚度范围为0.2mm~0.3mm。
  9. 如权利要求1所述的背光模组，其中，所述支架层的材料包括橡胶。
  10. 一种车载显示装置，包括背光模组，所述背光模组包括：
    背板；
    灯板，所述灯板设置于所述背板上；
    扩散板，所述扩散板设置于所述灯板远离所述背板的一侧上；以及
    支架层，所述支架层设置于所述灯板与所述扩散板之间，用于支撑所述扩散板，并隔开所述灯板与所述扩散板以形成混光空间。
  11. 如权利要求10所述的车载显示装置，其中，所述灯板包括电路板以及阵列排布于所述电路板上的多个微发光二极管，所述支架层设置于所述电路板的边缘。
  12. 如权利要求11所述的车载显示装置，其中，所述支架层靠近所述灯板的一侧设有凹槽，所述凹槽与所述灯板之间形成容置空间。
  13. 如权利要求12所述的车载显示装置，其中，所述电路板在位于所述容置空间的部分设有金手指端，所述电路板的线路均连接至所述金手指端，所述背光模组还包括柔性电路板，所述柔性电路板通过设置于所述背板上的开孔延伸至所述容置空间内，并与所述金手指端绑定连接。
  14. 如权利要求12所述的车载显示装置，其中，所述电路板在位于所述容置空间的部分设有连接器，所述灯板的线路均连接至所述连接器，所述背光模组还包括柔性电路板，所述柔性电路板通过设置于所述背板上的开孔延伸至所述容置空间，并与所述连接器插接。
  15. 如权利要求10所述的车载显示装置，其中，所述背光模组还包括胶框，所述胶框由所述背板外侧弯折至所述背板内侧，配置成用于支撑显示面板。
  16. 如权利要求15所述的车载显示装置，其中，所述背光模组还包括层叠设置于所述扩散板上的第一棱镜片和第二棱镜片，所述第二棱镜片与弯折至所述背板内侧的所述框胶之间形成间隙。
  17. 如权利要求16所述的车载显示装置，其中，所述间隙的厚度范围为0.2mm~0.3mm。
  18. 如权利要求10所述的车载显示装置，其中，所述支架层的材料包括橡胶。
  19. 一种车载显示装置，包括背光模组，所述背光模组包括：
    背板；
    灯板，所述灯板设置于所述背板上；
    扩散板，所述扩散板设置于所述灯板远离所述背板的一侧上；以及
    支架层，所述支架层设置于所述灯板与所述扩散板之间，用于支撑所述扩散板，并隔开所述灯板与所述扩散板以形成混光空间；
    其中，所述灯板包括电路板以及阵列排布于所述电路板上的多个微发光二极管，所述支架层靠近所述灯板的一侧设有凹槽，所述凹槽与所述灯板之间形成容置空间。
  20. 如权利要求19所述的车载显示装置，其中，所述电路板在位于所述容置空间的部分设有金手指端，所述电路板的线路均连接至所述金手指端，所述背光模组还包括柔性电路板，所述柔性电路板通过设置于所述背板上的开孔延伸至所述容置空间内，并与所述金手指端绑定连接。
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