WO2017211224A1 - 用于背光模组的发光组件、背光模组和显示装置 - Google Patents

用于背光模组的发光组件、背光模组和显示装置 Download PDF

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Publication number
WO2017211224A1
WO2017211224A1 PCT/CN2017/086879 CN2017086879W WO2017211224A1 WO 2017211224 A1 WO2017211224 A1 WO 2017211224A1 CN 2017086879 W CN2017086879 W CN 2017086879W WO 2017211224 A1 WO2017211224 A1 WO 2017211224A1
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WIPO (PCT)
Prior art keywords
light
light source
light absorbing
circuit board
backlight module
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PCT/CN2017/086879
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English (en)
French (fr)
Inventor
郑志福
王丽
奚道文
Original Assignee
京东方科技集团股份有限公司
高创(苏州)电子有限公司
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Application filed by 京东方科技集团股份有限公司, 高创(苏州)电子有限公司 filed Critical 京东方科技集团股份有限公司
Priority to EP17809663.2A priority Critical patent/EP3467581B1/en
Priority to US15/574,678 priority patent/US10330978B2/en
Publication of WO2017211224A1 publication Critical patent/WO2017211224A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0009—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only
    • G02B19/0014—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only at least one surface having optical power
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0938—Using specific optical elements
    • G02B27/095—Refractive optical elements
    • G02B27/0955—Lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0938—Using specific optical elements
    • G02B27/0977—Reflective elements
    • 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
    • G02F1/133608—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
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
    • H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
    • H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
    • H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
    • H01L25/0753—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00 the devices being arranged next to each other
    • 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
    • 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
    • G02F1/135—Liquid crystal cells structurally associated with a photoconducting or a ferro-electric layer, the properties of which can be optically or electrically varied
    • G02F1/1351—Light-absorbing or blocking layers
    • 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
    • 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

  • At least one embodiment of the present disclosure is directed to a lighting assembly, a backlight module, and a display device for a backlight module.
  • Liquid crystal display devices such as televisions typically include a display panel and a backlight that is used to provide backlighting for the display panel.
  • the backlight includes a side-in backlight and a direct-lit backlight depending on the position of the light source in the backlight.
  • a direct type backlight a plurality of light sources are evenly distributed on the non-display side of the display panel.
  • At least one embodiment of the present disclosure is directed to a light emitting assembly, a backlight module, and a display device for a backlight module to reduce or eliminate bright spots of the light and to enhance the overall taste of the screen.
  • At least one embodiment of the present disclosure provides a lighting assembly for a backlight module, including:
  • At least one light emitting unit disposed on the circuit board, the light emitting unit including a light source,
  • a light absorbing member is disposed on the circuit board, and the light absorbing member is disposed around the light source.
  • At least one embodiment of the present disclosure provides a backlight module including any of the light emitting components provided by the embodiments of the present disclosure.
  • At least one embodiment of the present disclosure provides a display device including any of the backlight modules provided by the embodiments of the present disclosure.
  • 1a is a schematic view of a light shadow of a light displayed by a display device
  • 1b is a top plan view of a light emitting assembly of a display device
  • FIG. 2a is a schematic diagram of a light emitting component according to an embodiment of the present disclosure
  • 2b is a schematic diagram of a light emitting component according to another embodiment of the present disclosure.
  • FIG. 3 is a schematic top view of a light emitting assembly according to an embodiment of the present disclosure
  • FIG. 3b is a schematic diagram of illumination intensity of a light-emitting component with a light absorbing element provided at different illumination angles according to an embodiment of the present disclosure
  • 3c is a schematic diagram of luminous intensity of a light-emitting component without a light absorbing element provided at different illumination angles according to an embodiment of the present disclosure
  • FIG. 3 is a schematic top view of a light emitting assembly according to another embodiment of the present disclosure.
  • 4a is a schematic top plan view of a light emitting assembly including a plurality of dispersed dots according to an embodiment of the present disclosure
  • FIG. 4b is a top plan view of another light emitting component including a plurality of dispersed dots according to an embodiment of the present disclosure
  • 4c is a schematic top plan view of a third type of light emitting assembly including a plurality of dispersed dots according to an embodiment of the present disclosure
  • FIG. 4 is a top plan view of a fourth light emitting assembly including a plurality of dispersed dots according to an embodiment of the present disclosure.
  • the multi-film solution has no cost competitive advantage.
  • more companies use single-film or non-membrane optics.
  • the shielding effect is poor and the light shadow is heavy, and in order to overcome these problems, a higher technical requirement is imposed on the backlight.
  • FIG. 1a shows a display device with a direct type backlight.
  • the non-display side of the display panel 01 is provided with a back plate 02, and the back plate 02 is provided with a printed circuit board 03 on the surface of the printed circuit board 03 near the display panel.
  • a plurality of light emitting units 04 are evenly distributed.
  • the upper side of the display panel 01 in FIG. 1a is the display side, the lower side of the display panel 01 is the non-display side, and the display side is opposite to the non-display side. Only the illumination unit 04 at the cross section is shown in Fig. 1a.
  • a light shadow bright spot 05 is also shown in Figure 1a.
  • a reflective paper 06 may also be disposed in the back sheet 01.
  • a top schematic view of the lighting assembly of the display device is shown in Figure 1b.
  • the lighting assembly of the display device includes a printed circuit board 03 and a plurality of lighting units 04 disposed thereon.
  • At least one embodiment of the present disclosure provides a lighting assembly for a backlight module, as shown in FIG. 2a, including a circuit board 10 and at least one lighting unit 20 disposed thereon, the lighting unit 20 including a light source 201, on the circuit board
  • a light absorbing member 30 is disposed on the light absorbing member 30, and the light absorbing member 30 is disposed to absorb a portion of the light at a central portion of the light emitting unit 20 to attenuate the brightness of the central portion of the light emitting unit 20.
  • FIG. 2a only one light-emitting unit 20 on the circuit board 10 is shown in FIG. 2a, and other light-emitting units can refer to the structure of the figure.
  • the light absorbing element 30 is configured to absorb a portion of the light at a central portion of the light emitting unit.
  • the central portion refers to, for example, a region where the light-emitting angle is in the range of -40° to 40°, and further, for example, the central portion refers to, for example, a region where the light-emitting angle is in the range of -30° to 30°, but is not limited thereto.
  • the central portion refers to the area where the brightness is large, and the area where the brightness needs to be weakened to obtain a small difference in brightness.
  • Embodiments of the present disclosure can absorb the central portion of the light-emitting unit 20 by providing a light absorbing element 30 on the peripheral circuit board 10 of the light source 201. Part of the light, which weakens the brightness of the center of the light-emitting unit, thus making The difference in brightness between the central portion and the edge portion of the light-emitting unit is reduced.
  • the brightness above the light source 201 can be optimized to be consistent with or substantially the same as the peripheral brightness, thereby reducing or eliminating the bright spots of the display device and improving the overall taste of the screen.
  • the light source 201 includes a light emitting diode chip.
  • the light-emitting diode chip here refers, for example, to a packaged light-emitting diode chip.
  • the light source 201 may have an illumination angle of 360°, and the light source disposed on the circuit board 10 may have an illumination angle of 180°, but is not limited thereto.
  • circuit board 10 includes a printed circuit board.
  • the reflectance of the light absorbing element 30 is lower than the reflectance at other locations of the circuit board 10. Thereby, the light can be absorbed, and the brightness of the central portion of the light-emitting unit is weakened, so that the difference in brightness between the central portion and the edge portion of the light-emitting unit is reduced.
  • the reflectance of the light absorbing member 30 may range from 5% to 80%, and further, for example, the reflectance of the light absorbing member 30 may range from 5% to 50%, and the reflectance of the light absorbing member 30 may range from 10% to 30%. %, but not limited to this.
  • the circuit board 10 is provided with a white reflective layer 40, and the light absorbing element 30 is disposed on the reflective layer 40.
  • the white reflective layer 40 has a reflectance of 98% or more, so that a high light utilization efficiency can be obtained.
  • the white reflective layer is, for example, a water-storing ink layer, but is not limited thereto.
  • the light unit 20 further includes a lens 202 that is secured to the circuit board 10 and disposed outside of the light source 201.
  • the lens 202 can be bonded to the circuit board 10 by the mounting portion 2020.
  • lens 202 is a secondary optical lens.
  • lens 202 includes a refractive lens that refracts light primarily by the refraction of the refractive lens.
  • light source 201 can be located at the center of the lens. The arrangement of the lens 202 can converge the light and improve the utilization of the light.
  • the lens is not provided, and the embodiment of the present disclosure does not limit this.
  • the illumination angle of the light-emitting unit ranges from about -80° to 80°.
  • light reaching the circuit board 10 for example, including light emitted by the light source 201, light reflected by the lens, light reflected by the optical film, etc.
  • the light absorbing member 30 reducing the position of the light absorbing member 30.
  • the reflectance at the position so that the brightness of the central portion of the light-emitting unit can be weakened, so that the difference in brightness between the central portion and the edge portion of the light-emitting unit is reduced.
  • the orthographic projection of light absorbing element 30 on circuit board 10 falls within the orthographic projection of lens 202 on circuit board 10, and is located at light source 201 on circuit board 10. On the front of the projection. Thereby, the brightness of the central portion of the light emitting unit 20 can be weakened, so that the difference in luminance between the central portion and the edge portion of the light emitting unit is reduced.
  • the shape of the light absorbing element 30 includes a closed loop disposed about the light source 201 to attenuate the brightness of the central portion of the light emitting unit 20.
  • the closed loop includes, for example, a ring, but is not limited thereto.
  • the light absorbing element 30 is a ring centered on the light source 201.
  • the light absorption of the light absorbing element 30 is constant. That is, from a position close to the light source 201 to a position away from the light source 201, the light absorption rate of the light absorbing element 30 is constant.
  • the light source 201 is a light emitting diode chip
  • the light source 201 is externally provided with a lens 202
  • the circuit board 10 is provided with a white reflective layer 40
  • the light absorbing element 30 is disposed on the reflective layer 40, and the light of the light absorbing element 30
  • the absorption rate is constant
  • the shape of the light absorbing member 30 is a closed circular ring disposed around the light source 201.
  • the light-emitting luminance curves at different light-emitting angles of the light-emitting diode chip are as shown in FIG. 3b.
  • the light emission luminance curves at different light emission angles of the light emitting diode chip are as shown in Fig. 3c.
  • the arrangement of the light absorbing element 30 is advantageous for reducing the difference in brightness between the central portion and the edge portion of the light-emitting unit, which is advantageous for improving the taste of the picture.
  • the difference in the luminance of the edge region and the luminance in the case where the light absorbing member 30 is not provided is not large.
  • the light absorbing element 30 includes a plurality of sub-light absorbing elements to attenuate the brightness of the central portion of the light emitting unit 20, and the first sub-light absorbing element disposed in turn away from the light source 201 is shown in Figure 3d.
  • the light absorptivity of the plurality of sub-light absorbing elements of the light absorbing element 30 gradually decreases from a position close to the light source 201 to a position away from the light source 201.
  • the light absorption rate of each sub-light absorbing element is constant.
  • the plurality of sub-light absorbing elements have the same material on the same radius centered on the light source and the light absorption rate is constant.
  • the light absorbing member 30 includes at least one of a black substance, a brown substance, a blue substance, and a gray substance, but is not limited thereto.
  • the first sub-light absorbing element 301 is a black substance
  • the second sub-light absorbing element 302 is a brown substance
  • the third sub-light absorbing element 303 is a gray substance, but is not limited thereto. It is to be noted that the number of the sub-light absorbing elements is not limited to the above-described examples.
  • the shape of the light absorbing element 30 includes a plurality of discrete points disposed about the light source 201 to attenuate the brightness of the central portion of the light emitting unit 20.
  • the pattern of light absorbing element 30 can also be as shown in Figures 4b, 4c.
  • a plurality of discrete points may be divergently disposed around the light source 201 in a ray pattern.
  • a plurality of discrete points can be evenly arranged. For example, it is evenly arranged within a circle around the light source.
  • the light absorption rates of a plurality of dispersed dots may be equal.
  • the light absorption rates of the plurality of dispersed dots may be unequal, and each of the dispersed dots is a sub-light absorbing element, for example, from a position near the light source 201 to a position away from the light source 201, The light absorptivity of the plurality of sub-light absorbing elements of the light absorbing element 30 gradually decreases.
  • the light absorbing element 30 comprises a plurality of sub-light absorbing elements, and the first sub-light absorbing element 301, the second sub-light absorbing element 302, which are disposed away from the light source 201 in turn, are shown in Figure 4d.
  • the third sub-light absorbing element 303, the first sub-light absorbing element 301, the second sub-light absorbing element 302, and the third sub-light absorbing element 303 respectively include a plurality of discrete dots disposed around the light source 201.
  • the light absorption rate of the sub-light absorbing elements of the light absorbing element 30 gradually decreases, and each of the sub-light absorbing elements includes a plurality of sub-light absorbing elements disposed around the light source 201 and centered thereon
  • the light absorption rate of each of the dispersed dots in each of the sub-light absorbing elements is the same.
  • the embodiment of the present disclosure is not limited to the embodiment of the present disclosure.
  • the illuminating assembly provided by the embodiment of the present disclosure may be used in conjunction with the optical film or the optical film.
  • the light absorbing member 30 may be disposed at a position where the illuminating intensity is greater than the mean value of the illuminating intensity within the illuminating angle (for example, -80 to 80) without providing the light absorbing member 30.
  • the light absorbing element 30 can be disposed adjacent to the light source 201 and bounded by the edge of the lens 202.
  • the light absorbing element 30 can be disposed within a range of one-half the diameter of the lens 202 centered on the light source 201.
  • the light absorbing element 30 can be disposed within a range of one quarter of the diameter of the lens 202 centered on the light source 201.
  • the shape or pattern of the light absorbing element 30 a suitable shape or pattern can be selected depending on the light-emitting intensity of the light-emitting element.
  • the rectangular light source 201 and the circular light absorbing element 30 are taken as an example.
  • the light absorbing element 30 may also adopt a quadrangular ring corresponding to the shape of the rectangular light source. Embodiments of the present disclosure This is not limited.
  • the light absorbing elements 30 can be arranged symmetrically about the light source 201. Thereby, the light emitted from the light emitting unit can be made more uniform, but the embodiment of the present disclosure is not limited thereto.
  • the light absorbing element 30 can be formed by printing, for example, after printing the light absorbing element 30 on the circuit board, soldering the light emitting diode chip on the circuit board, and then setting the lens, then bonding the lens to the circuit by dispensing On the board.
  • At least one embodiment of the present disclosure provides a backlight module including any of the above-described light emitting components.
  • the backlight module includes a direct type backlight module.
  • At least one embodiment of the present disclosure provides a display device including any of the above backlight modules.
  • the display device includes, for example, a television, but is not limited thereto.
  • the backlight module and the display device provided by the embodiments of the present disclosure have any light-emitting component according to the embodiment of the present disclosure, and the light-absorbing component disposed on the peripheral circuit board of the light source absorbs the light of the central portion of the light-emitting unit, thereby weakening the light-emitting unit.
  • the brightness of the central portion so that the difference in brightness between the central portion and the edge portion of the light-emitting unit is reduced.
  • the brightness above the light source can be optimized to be consistent with or substantially the same as the peripheral brightness, thereby reducing or eliminating the bright spots of the display device and improving the overall taste of the screen.

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Abstract

一种用于背光模组的发光组件、背光模组和显示装置，涉及显示技术领域，该发光组件包括电路板（10）以及设置在其上的至少一个发光单元（20），发光单元（20）包括光源（201），在电路板（10）上设置有光吸收元件（30），光吸收元件（30）围绕光源（201）设置。该发光组件、背光模组和显示装置可以减弱或消除灯影亮斑，提升画面整体的品味。

Description

用于背光模组的发光组件、背光模组和显示装置 技术领域
本公开至少一实施例涉及一种用于背光模组的发光组件、背光模组和显示装置。
背景技术
液晶显示装置例如电视通常包括显示面板和背光源，背光源用来为显示面板提供背光。根据背光源中的光源位置的不同，背光源包括侧入式背光源和直下式背光源。直下式背光源中，多个光源均匀分布在显示面板的非显示侧。
发明内容
本公开的至少一实施例涉及一种用于背光模组的发光组件、背光模组和显示装置，以减弱或消除灯影亮斑，提升画面整体的品味。
本公开的至少一实施例提供一种用于背光模组的发光组件，包括：
电路板，
至少一个发光单元，设置在所述电路板上，所述发光单元包括光源，
光吸收元件，设置在所述电路板上，所述光吸收元件围绕所述光源设置。
本公开的至少一实施例提供一种背光模组，包括本公开实施例提供的任一发光组件。
本公开的至少一实施例提供一种显示装置，包括本公开实施例提供的任一背光模组。
附图说明
为了更清楚地说明本公开实施例的技术方案，下面将对实施例的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本公开的一些实施例，而非对本公开的限制。
图1a为一种显示装置呈现的灯影亮斑的示意图；
图1b为一种显示装置的发光组件的俯视示意图；
图2a为本公开一实施例提供的一种发光组件示意图；
图2b为本公开另一实施例提供的一种发光组件示意图；
图3a为本公开一实施例提供的发光组件的俯视示意图；
图3b为本公开一实施例提供的设置光吸收元件的发光组件在不同发光角下的发光强度示意图；
图3c为本公开一实施例提供的不设置光吸收元件的发光组件在不同发光角度下的发光强度示意图；
图3d为本公开另一实施例提供的发光组件的俯视示意图；
图4a为本公开一实施例提供的一种包括多个分散的点的发光组件的俯视示意图；
图4b为本公开一实施例提供的另一种包括多个分散的点的发光组件的俯视示意图；
图4c为本公开一实施例提供的第三种包括多个分散的点的发光组件的俯视示意图；
图4d为本公开一实施例提供的第四种包括多个分散的点的发光组件的俯视示意图。
附图标记：
01-显示面板；02-背板；03-印刷电路板；04-发光单元；05-灯影亮斑；06-反射纸；10-电路板；20-发光单元；201-光源；30-光吸收元件；202-透镜；2020-透镜的安装部；40-反射层；301-第一子光吸收元件；302-第二子光吸收元件；303-第三子光吸收元件。
具体实施方式
为使本公开实施例的目的、技术方案和优点更加清楚，下面将结合本公开实施例的附图，对本公开实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本公开的一部分实施例，而不是全部的实施例。基于所描述的本公开的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例，都属于本公开保护的范围。
除非另外定义，本公开使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。同样，“一个”、“一”或者“该”等类似词语也不 表示数量限制，而是表示存在至少一个。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。“上”、“下”、“左”、“右”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也可能相应地改变。
直下式背光源中，采用多膜片方案已无成本竞争优势。为降低成本，更多的企业采用单张膜片或无膜片光学方案。而采用单张膜片或无膜片光学方案的情况下，会带来遮蔽效果差，灯影亮斑重的问题，为克服这些问题，对背光源提出了更高的技术要求。
图1a示出了一种具有直下式背光源的显示装置，显示面板01的非显示侧设置有背板02，背板02内设置有印刷电路板03，印刷电路板03上靠近显示面板的表面上均匀分布有多个发光单元04。图1a中显示面板01的上侧为显示侧，显示面板01的下侧为非显示侧，显示侧与非显示侧相对。图1a中仅示出了剖面处的发光单元04。图1a中还示出了灯影亮斑05。在背板01内还可设置有反射纸06。图1b中示出了显示装置的发光组件的俯视示意图。显示装置的发光组件包括印刷电路板03和设置在其上的多个发光单元04。
本公开至少一实施例提供一种用于背光模组的发光组件，如图2a所示，包括电路板10以及设置在其上的至少一个发光单元20，发光单元20包括光源201，在电路板10上设置有光吸收元件30，光吸收元件30围绕光源201设置，光吸收元件30被配置为吸收发光单元20中心部位的部分光线，以削弱发光单元20中心部位的亮度。需要说明的是，图2a中仅示出了电路板10上的一个发光单元20，其它发光单元可参照该图结构。光吸收元件30被配置来吸收发光单元中心部位的部分光线。中心部位例如是指发光角度在-40°至40°范围内的区域，进一步例如，中心部位例如是指发光角度在-30°至30°范围内的区域，但不限于此。中心部位指代亮度大的区域，亮度需要被削弱的区域以获得较小亮度差异。
因光源201上方发光强度较大，显示面板上出现灯影亮斑的几率就越大，本公开的实施例通过在光源201外围电路板10上设置光吸收元件30，可吸收发光单元20中心部位的部分光线，削弱发光单元中心部位的亮度，从而使 得发光单元中心部位与边缘部位的亮度差异减小。例如可将光源201上方亮度优化至与外围亮度一致或基本一致，从而减弱或消除显示装置的灯影亮斑，提升画面整体的品味。
例如，光源201包括发光二极管芯片。此处的发光二极管芯片例如是指经过封装的发光二极管芯片。例如，光源201的发光角度可为360°，设置在电路板10上的光源的发光角度可为180°，但不限于此。
例如，电路板10包括印刷电路板。
例如，光吸收元件30的反射率低于电路板10其它位置处的反射率。从而可以吸收光，减弱发光单元中心部位的亮度，使得发光单元中心部位与边缘部位的亮度差异减小。例如，光吸收元件30的反射率范围可为5％-80％，进一步例如光吸收元件30的反射率范围可为5％-50％，光吸收元件30的反射率范围可为10％-30％，但不限于此。
如图2b所示，为了提高光的利用率，在一些实施例中，电路板10上设置有白色的反射层40，光吸收元件30设置在反射层40上。例如，白色的反射层40的反射率在98％以上，从而，可以获得较高的光利用率。白色的反射层例如为积水油墨层，但不限于此。
如图2a、2b所示，在一些实施例中，发光单元20还包括透镜202，透镜202固定在电路板10上并设置在光源201外。例如，如图3a所示，透镜202可通过安装部2020粘结在电路板10上。例如，透镜202为二次光学透镜。例如，透镜202包括折射式透镜，光透过折射式透镜主要依靠折射式透镜的折射将光折射出去。例如，光源201可位于透镜的中心。透镜202的设置可以汇聚光并提高光的利用率，但需要说明的是，亦可不设置透镜，本公开的实施例对此不作限定。设置折射式透镜后，发光单元的发光角范围约为-80°至80°。例如，到达电路板10的光线(例如包括光源201发出的光、被透镜反射的光线、被光学膜片反射的光线等)中，被光吸收元件30吸收一部分，减小了光吸收元件30所在位置处的反射率，从而可减弱发光单元中心部位的亮度，使得发光单元中心部位与边缘部位的亮度差异减小。
如图2a、2b、3a所示，在一些实施例中，光吸收元件30在电路板10上的正投影落入透镜202在电路板10上的正投影内，并且位于光源201在电路板10上的正投影外。从而，可利于削弱发光单元20中心部位的亮度，使得发光单元中心部位与边缘部位的亮度差异减小。
如图3a所示，在一些实施例中，光吸收元件30的形状包括围绕光源201设置的封闭的环以削弱发光单元20中心部位的亮度。封闭的环例如包括圆环，但不限于此。例如，光吸收元件30为以光源201为圆心的圆环。
在一些实施例中，光吸收元件30的光吸收率为定值。即，从靠近光源201的位置处到远离光源201的位置处，光吸收元件30的光吸收率为定值。
在一个实施例中，光源201为发光二极管芯片，光源201外设置有透镜202，电路板10上设置有白色的反射层40，光吸收元件30设置在反射层40上，光吸收元件30的光吸收率为定值，光吸收元件30的形状为围绕光源201设置的封闭的圆环。设置光吸收元件30的情况下，发光二极管芯片的不同发光角度下的发光亮度曲线如图3b所示。不设置光吸收元件30的情况(除了不设置光吸收元件30外，其它与设置光吸收元件30的情况相同)下，发光二极管芯片的不同发光角度下的发光亮度曲线如图3c所示。从图3b和图3c可以看出，光吸收元件30的设置有利于发光单元中心部位与边缘部位的亮度差异的减小，有利于提升画面品味。从图3b和图3c中亦可以看出，设置光吸收元件30的情况下，边缘区域的亮度与不设置光吸收元件30的情况下的亮度的数值差异不大。
如图3d所示，在一些实施例中，光吸收元件30包括多个子光吸收元件以削弱发光单元20中心部位的亮度，图3d中示出了依次远离光源201设置的第一子光吸收元件301、第二子光吸收元件302和第三子光吸收元件303，从靠近光源201的位置处到远离光源201的位置处，光吸收元件30的多个子光吸收元件的光吸收率逐渐降低。例如，每个子光吸收元件的光吸收率为定值。例如，多个子光吸收元件在以光源为圆心的同一半径上的材质相同且光吸收率为定值。例如，光吸收元件30包括黑色物质、棕色物质、蓝色物质、灰色物质中至少之一，但不限于此。例如，第一子光吸收元件301为黑色物质，第二子光吸收元件302为棕色物质，第三子光吸收元件303为灰色物质，但不限于此。需要说明的是，子光吸收元件的个数不限于上述例举。
如图4a所示，在一些实施例中，光吸收元件30的形状包括围绕光源201设置的多个分散的点以削弱发光单元20中心部位的亮度。光吸收元件30的图形还可以如图4b、4c所示。如图4b所示，多个分散的点可以呈射线状围绕光源201发散设置。如图4c所示，多个分散的点可以均匀布置。例如，在围绕光源的圆环范围内均匀布置。图4b、4c所示的结构中，在一些实施例中， 多个分散的点的光吸收率可以相等。在另一些实施例中，多个分散的点的光吸收率可以不等，每个分散的点即为一个子光吸收元件，例如，从靠近光源201的位置处到远离光源201的位置处，光吸收元件30的多个子光吸收元件的光吸收率逐渐降低。如图4d所示，在一些实施例中，光吸收元件30包括多个子光吸收元件，图4d中示出了依次远离光源201设置的第一子光吸收元件301、第二子光吸收元件302和第三子光吸收元件303，第一子光吸收元件301、第二子光吸收元件302和第三子光吸收元件303分别包括多个围绕光源201设置的多个分散的点。例如，从靠近光源201的位置处到远离光源201的位置处，光吸收元件30的子光吸收元件的光吸收率逐渐降低，每个子光吸收元件包括围绕光源201设置并以其为圆心的多个分散的点，每个子光吸收元件中的各分散的点的光吸收率相同。
本公开的实施例提供的发光组件可以配合单张或多张光学膜片，也可以不与光学膜片配合使用，本公开的实施例对此不作限定。
对于光吸收元件30的设置位置，在不设置光吸收元件30的情况下，发光强度大于发光角度(例如-80°至80°)内发光强度的均值的位置处，可以设置光吸收元件30，但不限于此。例如，光吸收元件30可靠近光源201设置，并以透镜202边缘为界限。进一步例如，光吸收元件30可设置在以光源201为中心，透镜202直径的二分之一的范围内。更进一步例如，光吸收元件30可设置在以光源201为中心，透镜202直径的四分之一的范围内。
对于光吸收元件30的形状或图形，可依据发光元件的发光强度来选择适合的形状或图形。本公开的实施例中，以矩形的光源201、圆环形的光吸收元件30为例进行说明，光吸收元件30亦可采用与矩形的光源的形状相对应的四边形环，本公开的实施例对此不作限定。
例如，光吸收元件30可围绕光源201对称排布。从而可以使得发光单元出射的光更为均匀，但本公开的实施例并不限于此。
光吸收元件30可以通过印刷的方式形成，例如在电路板上印刷光吸收元件30后，将发光二极管芯片焊接在电路板上，设置透镜的情况下，再将透镜通过点胶方式粘结在电路板上。
本公开至少一实施例提供一种背光模组，包括上述任一发光组件。
例如，背光模组包括直下式背光模组。
本公开至少一实施例提供一种显示装置，包括上述任一背光模组。
显示装置例如包括电视，但不限于此。
本公开实施例提供的背光模组和显示装置，因具有本公开实施例所述的任一发光组件，则通过在光源外围电路板上设置的光吸收元件吸收发光单元中心部分光线，削弱发光单元中心部位的亮度，从而使得发光单元中心部位与边缘部位的亮度差异减小。进而，可将光源上方亮度优化至与外围亮度一致或基本一致，从而减弱或消除显示装置的灯影亮斑，提升画面整体的品味。
有以下几点需要说明：
(1)除非另作定义，本公开的实施例及附图中，同一标号代表同一含义。
(2)本公开实施例附图中，只涉及到与本公开实施例涉及到的结构，其他结构可参考通常设计。
(3)为了清晰起见，在用于描述本公开的实施例的附图中，层或区域的厚度被放大。可以理解，当诸如层、膜、区域或基板之类的元件被称作位于另一元件“上”或“下”时，该元件可以“直接”位于另一元件“上”或“下”，或者可以存在中间元件。
(4)在不冲突的情况下，本公开的同一实施例及不同实施例中的特征可以相互组合。
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以所述权利要求的保护范围为准。
本专利申请要求于2016年6月7日递交的中国专利申请第201610403665.6号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。

Claims (16)

  1. 一种用于背光模组的发光组件，包括：
    电路板，
    至少一个发光单元，设置在所述电路板上，所述发光单元包括光源，
    光吸收元件，设置在所述电路板上，所述光吸收元件围绕所述光源设置。
  2. 根据权利要求1所述的发光组件，其中，所述光吸收元件的形状包括围绕所述光源设置的封闭的环以削弱所述发光单元中心部位的亮度。
  3. 根据权利要求1所述的发光组件，其中，所述光吸收元件的形状包括围绕所述光源设置的多个分散的点以削弱所述发光单元中心部位的亮度。
  4. 根据权利要求1-3任一项所述的发光组件，其中，所述光吸收元件光吸收率为定值。
  5. 根据权利要求1-4任一项所述的发光组件，其中，所述光吸收元件围绕所述光源对称排布。
  6. 根据权利要求1-3任一项所述的发光组件，其中，从靠近所述光源的位置处到远离所述光源的位置处，所述光吸收元件的光吸收率逐渐降低。
  7. 根据权利要求1-3任一项所述的发光组件，其中，所述光吸收元件包括多个子光吸收元件，从靠近所述光源的位置处到远离所述光源的位置处，所述多个子光吸收元件的光吸收率逐渐降低。
  8. 根据权利要求1-7任一项所述的发光组件，其中，所述光吸收元件包括黑色物质、棕色物质、蓝色物质、灰色物质中至少之一。
  9. 根据权利要求1-8任一项所述的发光组件，其中，所述发光单元还包括透镜，所述透镜固定在所述电路板上并设置在所述光源外。
  10. 根据权利要求9所述的发光组件，其中，所述透镜包括折射式透镜。
  11. 根据权利要求9或10所述的发光组件，其中，所述光吸收元件在所述电路板上的正投影落入所述透镜在所述电路板上的正投影内，并且位于所述光源在所述电路板上的正投影外。
  12. 根据权利要求1-11任一项所述的发光组件，其中，所述电路板上设置有白色的反射层，所述光吸收元件设置在所述反射层上。
  13. 根据权利要求1-12任一项所述的发光组件，其中，所述电路板包括印刷电路板，所述光源包括发光二极管芯片。
  14. 一种背光模组，包括权利要求1-13任一项所述的发光组件。
  15. 根据权利要求14所述的背光模组，其中，所述背光模组包括直下式背光模组。
  16. 一种显示装置，包括权利要求14或15任一项所述的背光模组。
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