[go: up one dir, main page]

WO2023116402A1 - 背光模组及液晶显示装置 - Google Patents

背光模组及液晶显示装置 Download PDF

Info

Publication number
WO2023116402A1
WO2023116402A1 PCT/CN2022/136522 CN2022136522W WO2023116402A1 WO 2023116402 A1 WO2023116402 A1 WO 2023116402A1 CN 2022136522 W CN2022136522 W CN 2022136522W WO 2023116402 A1 WO2023116402 A1 WO 2023116402A1
Authority
WO
WIPO (PCT)
Prior art keywords
backlight
light
backlight module
optical assembly
liquid crystal
Prior art date
Application number
PCT/CN2022/136522
Other languages
English (en)
French (fr)
Inventor
胡晓刚
李荣荣
Original Assignee
惠科股份有限公司
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 惠科股份有限公司 filed Critical 惠科股份有限公司
Publication of WO2023116402A1 publication Critical patent/WO2023116402A1/zh

Links

Images

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

Definitions

  • the present application relates to the field of display technology, in particular to a backlight module and a liquid crystal display device.
  • a liquid crystal display device generally includes a liquid crystal display panel (Liquid Crystal Display, LCD for short) and a backlight module.
  • the backlight module is used to provide a light source for the LCD to display images on the LCD.
  • Backlight modules can be divided into direct-type backlight modules and edge-type backlight modules.
  • the direct type backlight module mainly includes a backlight plate, a light-emitting element arranged on the backlight plate, and an optical element located on the light-emitting element.
  • the light mixing distance of the light emitting element that is, the distance between the backlight plate and the optical element.
  • the light mixing distance is generally adjusted by changing the thickness of the backlight panel, which requires the design of different backlight panel molds, which increases mold development costs.
  • the present application aims to provide a backlight module and a liquid crystal display device.
  • the backlight module adjusts the light mixing distance of the light-emitting element by setting an adjustment mechanism between the edge of the backlight plate and the optical component or between the plastic frame and the optical component. To meet the display requirements of different products, there is no need to additionally develop a variety of different backlight molds, saving mold development costs.
  • the embodiment of the present application proposes a backlight module, including a backlight panel, a light-emitting component, and an optical component, the light-emitting component is located on the backlight panel, and the light-emitting component includes a circuit board and a plurality of light-emitting elements arranged on the circuit board; The optical component is located on the side away from the backlight of the light-emitting component.
  • the orthographic projection of the optical component on the backlight covers the orthographic projection of multiple light-emitting elements on the backlight.
  • the backlight module also includes an adjustment mechanism, which is arranged on the edge of the backlight Between the optical component and the optical component, the distance between the light-emitting element and the optical component along the first direction is adjusted by changing its own length, and the first direction is the light-emitting direction of the light-emitting element.
  • the embodiment of the present application also proposes a liquid crystal display device, including: a liquid crystal display panel;
  • the liquid crystal display panel provides a light source.
  • the backlight module adjusts the light mixing distance of the light-emitting elements by setting an adjustment mechanism between the edge of the backlight plate and the optical component, so as to meet the display requirements of different products, There is no need to additionally develop a variety of molds with different thicknesses or different structures for the backlight panel, saving mold development costs.
  • FIG. 1 shows a schematic structural view of a backlight module provided in the first embodiment of the present application and a liquid crystal display device including the backlight module;
  • FIG. 2 shows a schematic structural view of a backlight module provided in a second embodiment of the present application and a liquid crystal display device including the backlight module;
  • FIG. 3 shows a schematic structural view of a backlight module provided in a third embodiment of the present application and a liquid crystal display device including the backlight module;
  • FIG. 4 shows a schematic structural view of a backlight module provided in a fourth embodiment of the present application and a liquid crystal display device including the backlight module;
  • FIG. 5 shows a schematic structural view of a backlight module provided in a fifth embodiment of the present application and a liquid crystal display device including the backlight module;
  • FIG. 6 shows a schematic structural diagram of a backlight module provided in a sixth embodiment of the present application and a liquid crystal display device including the backlight module.
  • Backlight panel 111. Buckle; 12. Plastic frame; 121. First plastic frame part; 122. Second plastic frame part; 122a. Screw;
  • Light-emitting components 131. Light-emitting components; 132. Circuit boards;
  • Optical component 141. Diffusion plate; 142. Optical diaphragm; 14a, Groove;
  • Adjusting mechanism 151. Fixed part; 152. Adjusting part;
  • Liquid crystal display panel 3. Upper polarizer; 4. Cover plate.
  • a liquid crystal display device usually includes a liquid crystal display panel (Liquid Crystal Display, referred to as LCD) and a backlight module, wherein the liquid crystal display panel is a non-emissive light-receiving element, and the backlight module is arranged on the backlight side of the liquid crystal display panel.
  • the liquid crystal display panel provides a light source so that the liquid crystal display panel displays images.
  • the light mixing distance of the light emitting element that is, the distance between the backlight plate and the optical element.
  • the light mixing distance is generally adjusted by changing the thickness of the backlight panel, which requires the design of different backlight panel molds, which increases mold development costs.
  • various embodiments of the present application provide a backlight module and a liquid crystal display device including the backlight module.
  • An adjustment mechanism is set to adjust the light-mixing distance of the light-emitting element to meet the display requirements of different products. It is not necessary to develop additional molds with different thicknesses or structures for the backlight panel, which saves mold development costs.
  • FIG. 1 shows a schematic structural diagram of a backlight module and a liquid crystal display device provided by the first embodiment of the present application.
  • the first embodiment of the present application provides a liquid crystal display device, including a liquid crystal display panel 2 and a backlight module 1 arranged on the side of the backlight surface of the liquid crystal display panel 2.
  • the backlight module 1 is used to provide
  • the liquid crystal display panel 2 provides a light source.
  • the liquid crystal display panel 2 can be a single display panel, or a double display panel stacked in the thickness direction.
  • the display panel located at the bottom layer is used for light control, and the display panel located at the top layer is used for displaying.
  • Such arrangement can improve the contrast ratio of the liquid crystal display device.
  • various embodiments of the present application are described by taking the liquid crystal display panel 2 as a single display panel as an example.
  • the liquid crystal display device also includes an upper polarizer 3 positioned on the light emitting surface side of the liquid crystal display panel 2, a lower polarizer (not shown) positioned on the backlight side of the liquid crystal display panel 2, and a polarizer positioned on the upper polarizer side. 3
  • the cover plate 4 on the side away from the liquid crystal display panel 2 .
  • the lower polarizer and the upper polarizer 3 can polarize incident light of the liquid crystal display panel 2 to allow transmission of light vibrating in only one direction.
  • the backlight module 1 provided by the first embodiment of the present application includes a backlight panel 11 , a light emitting component 13 and an optical component 14 .
  • the light emitting assembly 13 is located on the backlight 11 , and the light emitting assembly 13 includes a circuit board 132 and a plurality of light emitting elements 131 disposed on the circuit board 132 .
  • the optical assembly 14 is located on the side of the light emitting assembly 13 away from the backlight 11 , and the orthographic projection of the optical assembly 14 on the backlight 11 covers the orthographic projection of the plurality of light emitting elements 131 on the backlight 11 .
  • the backlight module 1 also includes an adjustment mechanism 15, the adjustment mechanism 15 is arranged between the edge of the backlight panel 11 and the optical assembly 14, and adjusts the distance between the light emitting element 131 and the optical assembly along the first direction by changing its own length. is the light emitting direction of the light emitting element 131 .
  • the light-emitting assembly 13 adopts a direct layout, and the light emitting direction of the light-emitting element 131 is parallel to the length direction of the adjustment mechanism 15 .
  • the light-emitting assembly 13 includes a circuit board 132 and a plurality of light-emitting elements 131 arranged on the circuit board 132, wherein the light-emitting element 131 can be a light-emitting diode (Light-Emitting Diode, LED) of a conventional size, or a micro-light-emitting diode (Micro-Emitting Diode). LED) or submillimeter light emitting diode (Mini-LED). Micro-LED refers to LED chips with a grain size of less than 100 microns, and Mini-LED refers to LED chips with a grain size of about 100 to 300 microns. LED, Mini-LED or Micro-LED can be used as a self-illuminating light-emitting element display, which has the advantages of low power consumption, high brightness, high resolution, high color saturation, fast response, long life, and high efficiency.
  • the material of the backlight panel 11 can be a metal material, such as any one of aluminum plate, aluminum alloy plate, or galvanized steel, which is made by stamping and other processes.
  • the metal material has better ductility, which can protect the backlight module 1 from breaking under the impact of external force.
  • the material of the backlight plate 11 can also be a plastic material, such as polyimide, polycarbonate, polyethersulfone, polyethylene terephthalate, polyethylene, etc., to reduce the weight of the backlight module 1 and reduce the backlight The cost of mod 1.
  • the shape of the backlight plate 11 can be the same as that of the liquid crystal display panel 2 using the backlight module 1 . For example, when the shape of the liquid crystal display panel 2 is circular, the shape of the backlight plate 11 of the backlight module 1 used therein is also circular. The shape of the backlight panel 11 may vary with different embodiments.
  • the optical assembly 14 includes a diffuser plate 141 and an optical film 142 located on the side of the diffuser plate 141 away from the backlight plate 11.
  • the diffuser plate 141 and the optical film 142 are fixedly connected by transparent optical glue to prevent the diffuser plate of the optical assembly 14 from The relative displacement between the optical film 141 and the optical film 142 affects the light emitting effect of the backlight module 1 .
  • the diffuser plate 141 is used to diffuse the light emitted by the light emitting element 131 to balance the brightness of the entire backlight module 1 .
  • the optical film 142 may include, for example, a prism sheet, a protective sheet, etc.
  • the prism sheet is used to control the propagation direction of the light diffused by the diffusion plate 141 , so that the propagation direction of the light is perpendicular to the liquid crystal display panel 2 .
  • the protective sheet is used to protect the prisms of the prism sheet from scratches and the like. The protective sheet can also be used to widen the viewing angle that was previously narrowed by the prism sheet.
  • the adjustment mechanism 15 is disposed between the edge of the backlight 11 and the optical assembly 14, so as to adjust the distance between the backlight 11 and the optical assembly 14 in the first direction in the frame area other than the display area. While affecting the normal display function of the liquid crystal display device, the light mixing distance of the light emitting element 131 is adjusted according to design requirements to achieve different light mixing effects.
  • the backlight module 1 adjusts the light mixing distance of the light emitting element 131 by setting the adjustment mechanism 15 between the edge of the backlight plate 11 and the optical assembly 14, so as to satisfy According to the display requirements of different products, there is no need to additionally develop multiple molds with different thicknesses or different structures for the backlight panel 11 , which saves mold development costs.
  • the backlight module 1 further includes a plastic frame 12 disposed around the edge of the backlight panel 11 .
  • the plastic frame 12 is usually made of plastic material, such as polycarbonate, which has good elasticity.
  • the plastic frame 12 can provide a good buffer for the structures such as the light-emitting component 13 and the optical component 14, and prevent the structures such as the light-emitting component 13 and the optical component 14 from directly hitting the backlight plate 11 and being damaged.
  • the plastic frame 12 and the backlight panel 11 can be pasted together by double-sided adhesive tape after they are manufactured separately.
  • the backlight panel 11 after the backlight panel 11 is punched and formed, it can also be used as an insert and integrally injected with the plastic frame 12 .
  • the adjusting mechanism 15 includes a fixing part 151 and an adjusting part 152 movably connected with the fixing part 151 along a first direction, the fixing part 151 is connected with the edge of the backlight panel 11, and the adjusting part 152 is away from one end of the fixing part 151 abuts to the optical assembly 14 .
  • the fixing portion 151 is integrally formed with the edge of the backlight plate 11 , that is, the fixing portion 151 is formed by protruding from the edge of the backlight plate 11 toward the liquid crystal display panel 2 .
  • the plastic frame 12 is disposed around the edge of the backlight panel 11 , and the adjusting portion 152 may be a screw threadedly connected with the fixing portion 151 .
  • a part of the plastic frame 12 overlaps the adjusting portion 152 and abuts against the optical assembly 14 . That is to say, the end of the adjusting part 152 away from the fixing part 151 abuts against the diffuser plate 141 through a part of the plastic frame 12 .
  • the adjusting part 152 can be moved relative to the fixing part 151 , and then the distance between the backlight plate 11 and the optical assembly 14 can be adjusted, that is, the light mixing distance of the optical element 131 can be adjusted.
  • the backlight module 1 is a planar module, and the backlight module 1 also includes an elastic support column 16 that can be stretched along its own axial direction, and one end of the elastic support column 16 is connected to the circuit board 132 along its own axial direction, and the other One end abuts against the optical component 14 .
  • the elastic support column 16 is an elastic thimble with a spring inside, which can expand and contract with the change of the light mixing distance.
  • the number of elastic support columns 16 is multiple, and the ends of the plurality of elastic support columns 16 away from the circuit board 132 are respectively abutted against the diffuser plate 141 to prevent the middle position of the optical component 14 from being sunken inward due to its own gravity and affecting the light output effect.
  • the backlight module 1 with multiple elastic supporting columns 16 is especially suitable for larger-sized liquid crystal display devices, such as 67-inch or larger-sized liquid crystal display devices.
  • the elastic support column 16 Since the elastic support column 16 is disposed in the optical cavity of the backlight module 1 , it will absorb the light emitted by the light emitting element 131 and affect the optical quality.
  • the elastic support column 16 is disposed on the circuit board 132 of the light emitting component 13 , which may squeeze or even damage the circuit board 132 .
  • the elastic support column 16 falls off during use, it will stay in the optical cavity and cause abnormal noise, and affect the optical display effect. Therefore, in a liquid crystal display device with a size of 32 inches or smaller, the elastic support column 16 can generally be omitted.
  • the backlight module 1 further includes a light-shielding layer 18 and a reflective layer 19.
  • the light-shielding layer 18 is disposed on the side of the adjustment mechanism 15 facing the optical component 14, and the reflection layer 19 is disposed on the side of the adjustment mechanism 15 facing the light-emitting component 13. side and/or between the circuit board 132 and the backlight 11.
  • the light-shielding layer 18 is a black adhesive tape or a black rubber strip, and the light-shielding layer 18 is arranged on the side of the adjustment mechanism 15 facing the optical assembly 14 to prevent light leakage at the edge of the backlight module 1 .
  • the adjustment mechanism 15 is provided with a reflective layer 19 on the side facing the light-emitting assembly 13, and the reflective layer 19 is provided between the circuit board 132 and the backlight board 11, which can reflect the light irradiated by the light-emitting element 131 on the dimming mechanism 15 to the optical assembly 14, or reflect the light reflected from the optical assembly 14 to the space between the backlight panels 11 to the optical assembly 14 again, so as to improve the light extraction efficiency of the backlight module 1, and finally enhance the backlight brightness of the backlight module 1.
  • the reflective layer 19 can be made of plastic material. For example, polyethylene terephthalate (PET), polycarbonate (PC), polystyrene (PS) and the like.
  • PET polyethylene terephthalate
  • PC polycarbonate
  • PS polystyrene
  • the reflective layer 19 may also include a highly reflective coating, such as titanium dioxide TiO 2 , applied to a plastic material to increase the light reflectance.
  • FIG. 2 shows a schematic structural diagram of a backlight module provided in a second embodiment of the present application and a liquid crystal display device including the backlight module.
  • the second embodiment of the present application also provides a backlight module 1 and a liquid crystal display device including the backlight module 1, which has the same structure as the first embodiment and the backlight module 1 shown in FIG. Similar, the difference is that the adjustment mechanism 15 is disposed between the plastic frame 12 and the optical assembly 14 .
  • the adjusting mechanism 15 includes a fixing part 151 and an adjusting part 152 movably connected to the fixing part 151 along the first direction.
  • the fixing part 151 is connected to the plastic frame 12.
  • the fixing part 151 is integrally formed with the rubber frame 12, that is, the fixing part 151 can be a part of the rubber frame 12, and the adjusting part 152 includes a support plate and a screw threaded through the support plate and the fixing part 151. Connected to the diffuser plate 141 of the optical assembly 14 .
  • the adjustment mechanism 15 is arranged between the plastic frame 12 and the optical assembly 14, the side of the support plate facing the optical assembly 14 is provided with a light-shielding layer 18 to prevent the light emitted by the light-emitting element 131 from irradiating the support of the adjustment mechanism 15. Light leaks when board.
  • the light-shielding layer 18 is black adhesive tape or black adhesive tape.
  • the adjustment mechanism 15 is provided with a reflective layer 19 on the side facing the light-emitting assembly 13, that is, the reflective layer 19 is provided on the side where the edge of the backlight board 11 abuts against the plastic frame 12, and a 11 is provided between the circuit board 132 and the backlight board.
  • a reflective layer 19 to improve the light extraction efficiency of the backlight module 1 and finally enhance the brightness of the backlight of the backlight module 1 .
  • the reflective layer 19 can be made of plastic material. For example, polyethylene terephthalate (PET), polycarbonate (PC), polystyrene (PS) and the like.
  • PET polyethylene terephthalate
  • PC polycarbonate
  • PS polystyrene
  • the reflective layer 19 may also include a highly reflective coating, such as titanium dioxide TiO 2 , applied to a plastic material to increase the light reflectance.
  • the distance between the backlight panel 11 and the optical assembly 14 can also be adjusted in the frame area other than the display area, without affecting the normal display function of the liquid crystal display device.
  • the light mixing distance of the light emitting element 131 is adjusted according to design requirements, so as to achieve different light mixing effects.
  • the backlight module 1 adjusts the distance of the light emitting element 131 in the first direction by setting the adjustment mechanism 15 between the plastic frame 12 and the optical assembly 14, so as to To meet the display requirements of different products, there is no need to additionally develop multiple molds with different thicknesses or different structures for the backlight panel 11 , saving mold development costs.
  • FIG. 3 shows a schematic structural diagram of a backlight module provided in a third embodiment of the present application and a liquid crystal display device including the backlight module.
  • the third embodiment of the present application also provides a backlight module 1 and a liquid crystal display device including the backlight module 1, which has the same structure as the first embodiment and the backlight module 1 shown in Figure 1 Similar, the difference is that the backlight module 1 does not have a plastic frame 12, and there is no elastic support column 16 between the circuit board 132 of the light-emitting component 13 and the optical component 14. Occupies space and improves the brightness of the backlight module 1 . It is especially suitable for smaller-sized liquid crystal display devices, such as 32-inch or smaller-sized liquid crystal display devices.
  • the orthographic projection of the optical assembly 14 on the backlight 11 covers the orthographic projection of the adjustment mechanism 15 on the backlight 11 .
  • the length dimension of the backlight module 1 can be reduced.
  • the plastic frame 12 can be omitted, which is beneficial to realize the lightweight design of the liquid crystal display device.
  • the middle position of the optical assembly 14 will not be sunken inward due to its own gravity, so the elastic support column can also be omitted between the circuit board 132 of the light emitting assembly 13 and the optical assembly 14 16.
  • the light-emitting element 131 is a Mini-LED or Micro-LED, since the distance between two adjacent light-emitting elements 131 is small, it is not convenient to place the elastic support column 16, so the circuit board of the light-emitting component 13 The elastic support column 16 can also be omitted between 132 and the optical assembly 14 .
  • optical film 142 of the optical component 14 is fixedly connected to the liquid crystal display panel 2 through an optical adhesive J to prevent relative displacement between the two and improve the light emitting effect of the backlight module 1 .
  • the adjusting mechanism 15 includes a fixing part 151 and an adjusting part 152 movably connected to the fixing part 151 , the fixing part 151 is connected to the edge of the backlight panel 11 , and the end of the adjusting part 152 away from the fixing part 151 abuts against the optical assembly 14 .
  • the fixing portion 151 is integrally formed with the edge of the backlight plate 11 , that is, the fixing portion 151 is formed by protruding from the edge of the backlight plate 11 toward the liquid crystal display panel 2 .
  • the adjusting part 152 may be a screw threadedly connected with the fixing part 151 , and the adjusting part 152 abuts against the diffuser plate 141 . By rotating the adjusting part 152, the adjusting part 152 can be moved relative to the fixing part 151, thereby adjusting the distance between the backlight plate 11 and the optical assembly 14, that is, adjusting the light mixing distance of the optical element 131.
  • a light-shielding layer 18 is provided on a side of the adjustment portion 152 facing the optical assembly 14 .
  • the light-shielding layer 18 is black adhesive tape or black adhesive tape.
  • the light-shielding layer 18 is disposed on a side of the adjustment portion 152 facing the optical assembly 14 to prevent light leakage at the edge of the backlight module 1 .
  • the edge of the liquid crystal display panel 2 is also provided with a light-shielding layer 18 to prevent external light from affecting the display effect of the liquid crystal display panel 2 .
  • a reflective layer 19 is provided on the side of the adjusting mechanism 15 facing the light-emitting component 13 and between the circuit board 132 and the backlight plate, so that the light irradiated by the light-emitting element 131 on the dimming mechanism 15 is reflected to the optical component 14, or The light reflected from the optical assembly 14 to the gap 11 between the backlight panels is reflected to the optical assembly 14 again, so as to improve the light extraction efficiency of the backlight module 1 and finally enhance the backlight brightness of the backlight module 1 .
  • the reflective layer 19 can be made of plastic material. For example, polyethylene terephthalate (PET), polycarbonate (PC), polystyrene (PS) and the like.
  • PET polyethylene terephthalate
  • PC polycarbonate
  • PS polystyrene
  • the reflective layer 19 may also include a highly reflective coating, such as titanium dioxide TiO 2 , applied to a plastic material to increase the light reflectance.
  • FIG. 4 shows a schematic structural diagram of a backlight module provided in a fourth embodiment of the present application and a liquid crystal display device including the backlight module.
  • the fourth embodiment of the present application also provides a backlight module 1 and a liquid crystal display device including the backlight module 1, which has the same structure as the third embodiment and the backlight module 1 shown in Figure 3 Similar, the difference is that the structure and position of the adjustment mechanism 15 are different.
  • the optical component 14 is provided with a groove 14 a corresponding to the position of the adjustment mechanism 15 , and the adjustment portion 152 of the adjustment mechanism 15 protrudes into the groove 14 a and is flush with the light-emitting surface side of the optical film 142 .
  • a plurality of grooves 14 a are arranged at intervals on the edge of the optical assembly 14 , and the adjustment portions 152 of the plurality of adjustment mechanisms 15 extend into the grooves 14 a and abut against the diffuser plate 141 .
  • the orthographic projection of the optical assembly 14 on the backlight panel 11 covers the orthographic projection of the adjustment mechanism 15 on the backlight panel 11 .
  • the structure is simple, the space occupied by the light-emitting element 131 on the circuit board 132 is increased, and the brightness of the backlight module 1 is improved.
  • the fixing portion 151 is integrally formed with the edge of the backlight plate 11 , that is, the fixing portion 151 is formed by protruding from the edge of the backlight plate 11 toward the liquid crystal display panel 2 .
  • the adjustment part 152 includes a support plate and a screw connected with the support plate, and the screw passes through the support plate and is threadedly connected with the fixing part 151 .
  • the support plate abuts against the side of the optical assembly 14
  • the screw abuts against the side of the diffuser plate 141 facing the backlight plate 11 .
  • the adjusting part 152 By rotating the adjusting part 152 , the adjusting part 152 can be moved relative to the fixing part 151 , thereby adjusting the distance between the backlight plate 11 and the optical assembly 14 , that is, adjusting the light mixing distance of the optical element 131 .
  • a light-shielding layer 18 is provided on a side of the adjustment portion 152 facing the optical assembly 14 .
  • the light-shielding layer 18 is black adhesive tape or black adhesive tape.
  • the light-shielding layer 18 is disposed on a side of the adjustment portion 152 facing the optical assembly 14 to prevent light leakage at the edge of the backlight module 1 .
  • the edge of the liquid crystal display panel 2 is also provided with a light-shielding layer 18 to prevent external light from affecting the display effect of the liquid crystal display panel 2 .
  • a reflective layer 19 is provided on the side of the adjusting mechanism 15 facing the light-emitting component 13 and between the circuit board 132 and the backlight plate, so that the light irradiated by the light-emitting element 131 on the dimming mechanism 15 is reflected to the optical component 14, or The light reflected from the optical assembly 14 to the gap 11 between the backlight panels is reflected to the optical assembly 14 again, so as to improve the light extraction efficiency of the backlight module 1 and finally enhance the backlight brightness of the backlight module 1 .
  • the reflective layer 19 can be made of plastic material. For example, polyethylene terephthalate (PET), polycarbonate (PC), polystyrene (PS) and the like.
  • PET polyethylene terephthalate
  • PC polycarbonate
  • PS polystyrene
  • the reflective layer 19 may also include a highly reflective coating, such as titanium dioxide TiO 2 , applied to a plastic material to increase the light reflectance.
  • FIG. 5 shows a schematic structural diagram of a backlight module provided by a fifth embodiment of the present application and a liquid crystal display device including the backlight module.
  • the fifth embodiment of the present application also provides a backlight module 1 and a liquid crystal display device including the backlight module 1 , which are the same as those shown in the first to fourth embodiments and those shown in FIGS. 1 to 4 .
  • the structure of the backlight module 1 is similar to that shown in FIG.
  • the circuit board 132 of the light-emitting assembly 13 Due to the curvature of the curved surface backlight module 1, and the circuit board 132 of the light-emitting assembly 13 is a flat plate, when the circuit board 132 is attached to the backlight plate 11 of the curved surface backlight module 1, part of the circuit board 132 is in contact with the backlight plate 11 due to stress.
  • the peeling causes the light mixing distance from the light emitting element 131 to the diffuser plate 141 to change, resulting in uneven brightness of the liquid crystal display device and affecting the display effect.
  • the curved surface backlight module 1 also includes a locking mechanism 17, which is connected between the circuit board 132 and the backlight board 11 to prevent relative movement between the circuit board 132 and the backlight board 11, and ensure that the light emitting element 131 and the backlight board 11 are connected to each other.
  • the light mixing distance between the diffusion plates 141 remains unchanged after the adjustment mechanism 15 is adjusted to a preset value.
  • the locking mechanism 17 is a screw, and an embedded nut is provided between adjacent light-emitting elements 131 on the circuit board 132 , the screw passes through the backlight board 11 and is screwed with the nut on the circuit board 132 .
  • the plastic frame 12 includes a first plastic frame part 121 and a second plastic frame part 122 which are movably connected. forming.
  • the fixing part 151 of the adjustment mechanism 15 is the first plastic frame part 121
  • the adjustment part 152 of the adjustment mechanism 15 is the second plastic frame part 122
  • the second plastic frame part 122 is provided with a screw 122a
  • the first plastic frame part 121 is correspondingly provided with an internal thread threaded with the screw 122a, and the second plastic frame part 122 can be moved relative to the first plastic frame part 121 by rotating the screw 122a.
  • the first plastic frame part 121 is connected to the edge of the backlight panel 11 through the buckle 111
  • the second plastic frame part 122 is connected to the optical assembly 14, so that the distance between the backlight panel 11 and the optical assembly 14 can be adjusted, and then the light emission can be adjusted.
  • Light mixing distance of element 131 is the first plastic frame part 121
  • the adjustment part 152 of the adjustment mechanism 15 is the second plastic frame part 122
  • the second plastic frame part 122 is provided with a screw 122a
  • the first plastic frame part 121 is correspondingly provided with an internal thread
  • the second plastic frame portion 122 of the plastic frame 12 is provided with a light-shielding layer 18 on the side facing the optical assembly 14 , and the light-shielding layer 18 is black tape or black tape to prevent light leakage at the edge of the curved backlight module 1 .
  • a reflective layer 19 is provided on the side of the first plastic frame part 121 facing the light-emitting assembly 13 and between the circuit board 132 and the backlight plate, so that the light irradiated by the light-emitting element 131 on the dimming mechanism 15 is reflected to the optical assembly 14, or reflect the light reflected from the optical assembly 14 to the gap 11 between the backlight panels to the optical assembly 14 again, so as to improve the light extraction efficiency of the backlight module 1 and finally enhance the backlight brightness of the backlight module 1 .
  • the reflective layer 19 can be made of plastic material. For example, polyethylene terephthalate (PET), polycarbonate (PC), polystyrene (PS) and the like.
  • PET polyethylene terephthalate
  • PC polycarbonate
  • PS polystyrene
  • the reflective layer 19 may also include a highly reflective coating, such as titanium dioxide TiO 2 , applied to a plastic material to increase the light reflectance.
  • FIG. 6 shows a schematic structural diagram of a backlight module provided in a sixth embodiment of the present application and a liquid crystal display device including the backlight module.
  • the sixth embodiment of the present application also provides a backlight module 1 and a liquid crystal display device including the backlight module 1, which has the same structure as the fifth embodiment and the backlight module 1 shown in FIG. Similarly, the difference is that the structure of the adjustment mechanism 15 is different.
  • the fixing portion 151 of the adjustment mechanism 15 is integrally formed with the edge of the backlight plate 11, that is, the fixing portion 151 is formed by protruding from the edge of the backlight plate 11 toward the liquid crystal display panel 2, and the plastic frame 12 is connected with the adjustment
  • the part 152 is integrally formed. That is, one end of the plastic frame 12 is connected to the edge of the backlight panel 11 through a buckle 111, and the other end is connected to the optical assembly 14, and the plastic frame 12 is provided with an adjustment part 152.
  • the adjustment part 152 can be a screw, for example, and the edge of the backlight panel 11 A fixing part 151 is provided at the position, and the adjusting part 152 is screwed to the fixing part 151 , so that the distance between the backlight panel 11 and the optical assembly 14 can be adjusted, thereby adjusting the light mixing distance of the light emitting element 131 .
  • a light-shielding layer 18 is provided on the side of the plastic frame 12 facing the optical assembly 14, and the light-shielding layer 18 is a black tape or a black rubber strip, so as to prevent light leakage at the edge of the curved backlight module 1 .
  • the side of the plastic frame 12 facing the light-emitting component 13, that is, the fixing portion 151 of the backlight plate 11 is provided with a reflective layer 19 on the side facing the light-emitting component 13, and a reflective layer 19 is provided between the circuit board 132 and the backlight plate 11,
  • the light irradiated by the light-emitting element 131 on the dimming mechanism 15 is reflected to the optical assembly 14, or the light reflected from the optical assembly 14 to the gap 11 between the backlight panels is reflected to the optical assembly 14 again, so as to improve the light output efficiency of the backlight module 1 , and finally enhance the backlight brightness of the backlight module 1 .
  • the reflective layer 19 can be made of plastic material. For example, polyethylene terephthalate (PET), polycarbonate (PC), polystyrene (PS) and the like.
  • PET polyethylene terephthalate
  • PC polycarbonate
  • PS polystyrene
  • the reflective layer 19 may also include a highly reflective coating, such as titanium dioxide TiO 2 , applied to a plastic material to increase the light reflectance.
  • the curved surface backlight module 1 also includes a locking mechanism 17, which is connected between the circuit board 132 and the backlight board 11 to prevent relative movement between the circuit board 132 and the backlight board 11, and ensure that the light emitting element 131 and the backlight board 11 The light mixing distance between the diffusion plates 141 remains unchanged after the adjustment mechanism 15 is adjusted to a preset value.
  • the locking mechanism 17 is a screw, and an embedded nut is provided between adjacent light-emitting elements 131 on the circuit board 132 , the screw passes through the backlight board 11 and is screwed with the nut on the circuit board 132 .
  • the technical solutions of the backlight module 1 provided by the various embodiments of the present application can be widely used to provide light sources to various liquid crystal display panels, such as TN (Twisted Nematic, twisted nematic) display panels, IPS (In- Plane Switching (plane switching type) display panel, VA (Vertical Alignment, vertical alignment type) display panel, MVA (Multi-Domain Vertical Alignment, multi-quadrant vertical alignment type) display panel.
  • TN Transmission Nematic, twisted nematic
  • IPS In- Plane Switching (plane switching type) display panel
  • VA Very Alignment, vertical alignment type
  • MVA Multi-Domain Vertical Alignment, multi-quadrant vertical alignment type
  • a layer may refer to a portion of material comprising a region having a certain thickness.
  • a layer may extend over the entirety of the underlying or overlying structure, or may have an extent that is less than the extent of the underlying or overlying structure.
  • a layer may be a region of a homogeneous or non-homogeneous continuous structure having a thickness less than the thickness of the continuous structure.
  • a layer may be located between the top and bottom surfaces of the continuous structure or between any pair of transverse planes at the top and bottom surfaces. Layers may extend laterally, vertically and/or along the tapered surface.
  • Substrate A substrate may be a layer, may include one or more layers therein, and/or may have one or more layers located thereon, above, and/or below. Layers may include multiple layers.
  • interconnect layers may include one or more conductor and contact layers (in which contacts, interconnect lines, and/or vias are formed) and one or more dielectric layers.

Landscapes

  • 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)
  • Liquid Crystal (AREA)

Abstract

一种背光模组(1)及液晶显示装置。背光模组(1)包括背光板(11)、发光组件(13)和光学组件(14)，发光组件(13)位于背光板(11)上，光学组件(14)位于发光组件(13)远离背光板(11)的一侧，背光模组(1)还包括调节机构(15)，调节机构(15)设置于背光板(11)的边缘与光学组件(14)之间，通过改变自身长度调节发光元件(131)与光学组件(14)之间沿第一方向的距离，第一方向为发光元件(131)的出光方向。通过设置调节机构(15)来调节发光元件(131)的混光距离，节约背光板(11)的模具开发费用。

Description

背光模组及液晶显示装置
相关申请的交叉引用
本申请要求享有于2021年12月24日提交的名称为“背光模组及液晶显示装置”的中国专利申请202111598821.6的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及显示技术领域，特别是涉及一种背光模组及液晶显示装置。
背景技术
液晶显示装置通常包括液晶显示面板(Liquid Crystal Display，简称LCD)和背光模组，背光模组用于为LCD提供光源，以使LCD显示图像。
背光模组可以分为直下式背光模组和侧光式背光模组。直下式背光模组主要包括背光板、设置于背光板上的发光元件及位于发光元件上的光学元件。对于同一尺寸的液晶显示装置，为了达到不同的显示效果，需要调整发光元件的混光距离，即背光板与光学元件之间的间距。相关技术中一般通过改变背光板的厚度来调整该混光距离，这就需要设计不同的背光板模具，增加了模具开发费用。
发明内容
本申请旨在提供一种背光模组及液晶显示装置，该背光模组通过在背光板的边缘与光学组件之间或者胶框与光学组件之间设置调节机构来调节发光元件的混光距离，以满足不同产品的显示要求，不需要额外开发多种不同的背光板模具，节约模具开发费用。
第一方面，本申请实施例提出了一种背光模组，包括背光板、发光组件和光学组件，发光组件位于背光板上，发光组件包括电路板和设置于电路板上的多个发光元件；光学组件位于发光组件远离背光板的一侧，光学组件在背光板上的正投影覆盖多个发光元件在背光板上的正投影，背光模 组还包括调节机构，调节机构设置于背光板的边缘与光学组件之间，通过改变自身长度调节发光元件与光学组件之间沿第一方向的距离，第一方向为发光元件的出光方向。
第二方面，本申请实施例还提出了一种液晶显示装置，包括：液晶显示面板；和如前所述的背光模组，设置于液晶显示面板的背光面一侧，背光模组用于向液晶显示面板提供光源。
根据本申请实施例提供的背光模组及液晶显示装置，该背光模组通过在背光板的边缘与光学组件之间设置调节机构来调节发光元件的混光距离，以满足不同产品的显示要求，不需要为背光板额外开发多种不同厚度或者不同结构的模具，节约模具开发费用。
附图说明
下面将参考附图来描述本申请示例性实施例的特征、优点和技术效果。在附图中，相同的部件使用相同的附图标记。附图并未按照实际的比例绘制，仅用于示意相对位置关系，某些部位的层厚采用了夸大的绘图方式以便于理解，附图中的层厚并不代表实际层厚的比例关系。
图1示出本申请第一实施例提供的背光模组及包括该背光模组的液晶显示装置的结构示意图；
图2示出本申请第二实施例提供的背光模组及包括该背光模组的液晶显示装置的结构示意图；
图3示出本申请第三实施例提供的背光模组及包括该背光模组的液晶显示装置的结构示意图；
图4示出本申请第四实施例提供的背光模组及包括该背光模组的液晶显示装置的结构示意图；
图5示出本申请第五实施例提供的背光模组及包括该背光模组的液晶显示装置的结构示意图；
图6示出本申请第六实施例提供的背光模组及包括该背光模组的液晶显示装置的结构示意图。
附图标记说明：
1、背光模组；
11、背光板；111、卡扣；12、胶框；121、第一胶框部；122、第二胶框部；122a、螺钉；
13、发光组件；131、发光元件；132、电路板；
14、光学组件；141、扩散板；142、光学膜片；14a、凹槽；
15、调节机构；151、固定部；152、调节部；
16、弹性支撑柱；17、锁紧机构；J、光学胶；
18、遮光层；19、反射层；
2、液晶显示面板；3、上偏光片；4、盖板。
具体实施方式
下面将详细描述本申请的各个方面的特征和示例性实施例。在下面的详细描述中，提出了许多具体细节，以便提供对本申请的全面理解。但是，对于本领域技术人员来说很明显的是，本申请可以在不需要这些具体细节中的一些细节的情况下实施。下面对实施例的描述仅仅是为了通过示出本申请的示例来提供对本申请的更好的理解。在附图和下面的描述中，至少部分的公知结构和技术没有被示出，以便避免对本申请造成不必要的模糊；并且，为了清晰，可能夸大了区域结构的尺寸。此外，下文中所描述的特征、结构或特性可以以任何合适的方式结合在一个或更多实施例中。
液晶显示装置通常包括液晶显示面板(Liquid Crystal Display，简称LCD)和背光模组，其中液晶显示面板为非发射型光接收元件，背光模组设置于液晶显示面板的背光面一侧，用于为液晶显示面板提供光源，以使液晶显示面板显示图像。
对于同一尺寸的液晶显示装置，为了达到不同的显示效果，需要调整发光元件的混光距离，即背光板与光学元件之间的间距。相关技术中一般通过改变背光板的厚度来调整该混光距离，这就需要设计不同的背光板模具，增加了模具开发费用。
有鉴于此，本申请各实施例提供了一种背光模组及包括该背光模组的液晶显示装置，该背光模组通过在背光板的边缘与光学组件之间或者胶框 与光学组件之间设置调节机构来调节发光元件的混光距离，以满足不同产品的显示要求，不需要为背光板额外开发多种不同厚度或者不同结构的模具，节约模具开发费用。
下面结合附图分别描述本申请各实施例提供的背光模组及包括该背光模组的液晶显示装置的具体结构。
第一实施例
图1示出本申请第一实施例提供的背光模组及液晶显示装置的结构示意图。
如图1所示，本申请第一实施例提供了一种液晶显示装置，包括液晶显示面板2和设置于液晶显示面板2的背光面一侧的背光模组1，背光模组1用于向液晶显示面板2提供光源。
液晶显示面板2可以为单个显示面板，也可以为在厚度方向上层叠设置的双显示面板。当液晶显示面板2为双显示面板时，其中位于底层的显示面板用于控光，位于顶层的显示面板用于显示，如此设置可以提高液晶显示装置的对比度。为了便于描述，本申请各实施例以液晶显示面板2为单个显示面板为例进行描述。
另外，液晶显示装置还包括位于液晶显示面板2的出光面一侧的上偏光片3、位于液晶显示面板2的背光面一侧的下偏光片(图中未示出)，以及位于上偏光片3背离液晶显示面板2一侧的盖板4。下偏光片和上偏光片3可使液晶显示面板2的入射光偏振，以允许仅在一个方向上振动的光透射。
如图1所示，本申请第一实施例提供的背光模组1包括背光板11、发光组件13和光学组件14。
发光组件13位于背光板11上，发光组件13包括电路板132和设置于电路板132上的多个发光元件131。光学组件14位于发光组件13远离背光板11的一侧，光学组件14在背光板11上的正投影覆盖多个发光元件131在背光板11上的正投影。
背光模组1还包括调节机构15，调节机构15设置于背光板11的边缘与光学组件14之间，通过改变自身长度调节发光元件131与光学组件之间 沿第一方向的距离，第一方向为发光元件131的出光方向。本文中，发光组件13采用直下式布局方式，发光元件131的出光方向与调节机构15的长度方向平行。
发光组件13包括电路板132和设置于电路板132上的多个发光元件131，其中发光元件131可以为常规尺寸的发光二极管(Light-Emitting Diode，LED)，也可以为微型发光二极管(Micro-LED)或者亚毫米发光二极管(Mini-LED)中的任一者。Micro-LED是指晶粒尺寸在100微米以下的LED芯片，Mini-LED是指晶粒尺寸在100～300微米左右的LED芯片。LED、Mini-LED或者Micro-LED可以作为自发光的发光元件显示，具有低功耗、高亮度、高分辨率、高色彩饱和度、反应速度快、寿命较长、效率较高等优点。
背光板11的材质可以为金属材料，例如铝板、铝合金板、或镀锌钢中的任一者，采用冲压等工艺制成。金属材料具有较好的延展性，可以保护背光模组1在外力的冲击下不易破碎。背光板11的材质还可以为塑胶材料，例如聚酰亚胺、聚碳酸酯、聚醚砜、聚对苯二甲酸乙二醇酯、聚乙烯等，以减轻背光模组1的重量，降低背光模组1的成本。背光板11的形状可以与使用该背光模组1的液晶显示面板2的形状相同。例如，当液晶显示面板2的形状为圆形时，其使用的背光模组1的背光板11的形状也为圆形。背光板11的形状可以随不同的实施例而变化。
光学组件14包括扩散板141和位于扩散板141背离背光板11一侧的光学膜片142，扩散板141和光学膜片142之间通过透明的光学胶固定连接，以防止光学组件14的扩散板141与光学膜片142之间发生相对位移而影响背光模组1的出光效果。
扩散板141用于扩散发光元件131发射的光，以均衡整个背光模组1的亮度。光学膜片142可以包括例如棱镜片、保护片等，棱镜片用于控制由扩散板141扩散的光的传播方向，以使光的传播方向与液晶显示面板2垂直。保护片用于保护棱镜片的棱镜免受刮擦等。保护片还可用于加宽之前由于棱镜片而变窄的视角。
在一个示例中，调节机构15设置于背光板11的边缘与光学组件14之 间，从而在显示区以外的边框区调节背光板11与光学组件14之间在第一方向上的距离，在不影响液晶显示装置的正常显示功能的同时，根据设计需求调整发光元件131的混光距离，以达到不同的混光效果。
由此，对于同一尺寸的液晶显示装置，可以根据设计需求开发出不同的混光距离的多种背光模组1，且不需要专门开发不同厚度或者不同结构的背光板11，节省模具开发费用，只需要通过调节机构15调整好背光板11与光学组件14之间的距离即可，降低了模具开发费用。
根据本申请实施例提供的背光模组1及液晶显示装置，该背光模组1通过在背光板11的边缘与光学组件14之间设置调节机构15来调节发光元件131的混光距离，以满足不同产品的显示要求，不需要为背光板11额外开发多种不同厚度或者不同结构的模具，节约模具开发费用。
在一些实施例中，背光模组1还包括胶框12，胶框12围绕背光板11的边缘设置。胶框12通常采用塑胶材料制作，例如聚碳酸酯，具有较好的弹性。在背光模组1的运输和使用过程中，胶框12可以为发光组件13及光学组件14等结构提供较好的缓冲作用，防止发光组件13及光学组件14等结构直接撞击背光板11而破损。可选地，胶框12和背光板11可以分别制作完成后通过双面胶带粘贴在一起。可选地，背光板11冲压成型后，也可以作为嵌件与胶框12一体注塑成型。
在一些实施例中，调节机构15包括固定部151和与固定部151沿第一方向可移动连接的调节部152，固定部151与背光板11的边缘连接，调节部152远离固定部151的一端抵接至光学组件14。
如图1所示，固定部151与背光板11的边缘一体成型，即固定部151由背光板11的边缘朝向液晶显示面板2凸出形成。胶框12围绕背光板11的边缘设置，调节部152可以为与固定部151螺纹连接的螺钉，胶框12的一部分搭接在调节部152上，并抵接至光学组件14。也就是说，调节部152远离固定部151的一端通过胶框12的一部分抵接至扩散板141。由此，通过旋转调节部152，可以使调节部152相对于固定部151移动，进而调整背光板11与光学组件14之间的距离，即调整光学元件131的混光距离。
在一些实施例中，背光模组1为平面模组，背光模组1还包括沿自身 轴向可伸缩的弹性支撑柱16，弹性支撑柱16沿自身轴向的一端与电路板132连接，另一端抵接至光学组件14。
可选地，弹性支撑柱16为内部设置有弹簧的弹性顶针，可以随混光距离的变化而伸缩。弹性支撑柱16的数量为多个，多个弹性支撑柱16远离电路板132的一端分别抵接至扩散板141，防止光学组件14的中间位置因自身重力向内凹陷而影响出光效果。这种具有多个弹性支撑柱16的背光模组1尤其适用于较大尺寸的液晶显示装置，例如67英寸或者更大尺寸的液晶显示装置。
由于弹性支撑柱16设置在背光模组1的光学腔体内，会吸收发光元件131发射的光线，影响光学品味。弹性支撑柱16设置于发光组件13的电路板132上，有可能会挤压甚至损坏电路板132。另外，弹性支撑柱16在使用的过程中脱落的话，会留在光学腔体内发生异响，并且影响光学显示效果。因此，在32英寸或者更小尺寸的液晶显示装置中，一般可以省略弹性支撑柱16。
在一些实施例中，背光模组1还包括遮光层18和反射层19，遮光层18设置于调节机构15朝向光学组件14的一侧，反射层19设置于调节机构15朝向发光组件13的一侧和/或电路板132与背光板之间11。
由于调节机构15设置于背光板11的边缘，发光元件131发射的光照射至调节机构15时有可能会漏光。可选地，遮光层18为黑色胶带或者黑色胶条，遮光层18设置于调节机构15朝向光学组件14的一侧，可以防止背光模组1在边缘处漏光。
进一步地，调节机构15朝向发光组件13的一侧设置有反射层19，以及电路板132与背光板之间11设置有反射层19，可以使发光元件131照射到调光机构15上的光线反射至光学组件14，或者将从光学组件14反射至背光板之间11的光线再次反射至光学组件14，提高背光模组1的出光效率，最终增强背光模组1的背光亮度。
反射层19可以由塑性材料制备而成。例如，聚对苯二甲酸乙二醇酯(PET)、聚碳酸酯(PC)、聚苯乙桸(PS)等。反射层19还可以包括涂覆到塑性材料上的高反射涂层，例如，二氧化钛TiO 2，以增大光反射系数。
第二实施例
图2示出本申请第二实施例提供的背光模组及包括该背光模组的液晶显示装置的结构示意图。
如图2所示，本申请第二实施例还提供了一种背光模组1及包括该背光模组1的液晶显示装置，其与第一实施例及图1所示的背光模组1结构类似，不同之处在于，调节机构15设置于胶框12与光学组件14之间。
具体来说，调节机构15包括固定部151和与固定部151沿第一方向可移动连接的调节部152，固定部151与胶框12连接，调节部152远离固定部151的一端抵接至光学组件14。
可选地，固定部151与胶框12一体成型设置，即固定部151可以为胶框12的一部分，调节部152包括支撑板和穿过支撑板与固定部151螺纹连接的螺钉，支撑板抵接至光学组件14的扩散板141。
进一步地，由于调节机构15设置于胶框12与光学组件14之间，支撑板朝向光学组件14的一侧的设置有遮光层18，以防止发光元件131发射的光照射至调节机构15的支撑板时漏光。可选地，遮光层18为黑色胶带或者黑色胶条。
另外，调节机构15朝向发光组件13的一侧设置有反射层19，即背光板11的边缘与胶框12抵靠的一侧设置有反射层19，以及电路板132与背光板之间11设置有反射层19，提高背光模组1的出光效率，最终增强背光模组1的背光亮度。
反射层19可以由塑性材料制备而成。例如，聚对苯二甲酸乙二醇酯(PET)、聚碳酸酯(PC)、聚苯乙桸(PS)等。反射层19还可以包括涂覆到塑性材料上的高反射涂层，例如，二氧化钛TiO 2，以增大光反射系数。
本实施例中，由于胶框12围绕背光板11的边缘设置，从而也可以在显示区以外的边框区调节背光板11与光学组件14之间的距离，在不影响液晶显示装置的正常显示功能的同时，根据设计需求调整发光元件131的混光距离，以达到不同的混光效果。
根据本申请实施例提供的背光模组1及液晶显示装置，该背光模组1通过在胶框12与光学组件14之间设置调节机构15来调节发光元件131在 第一方向上的距离，以满足不同产品的显示要求，不需要为背光板11额外开发多种不同厚度或者不同结构的模具，节约模具开发费用。
第三实施例
图3示出本申请第三实施例提供的背光模组及包括该背光模组的液晶显示装置的结构示意图。
如图3所示，本申请第三实施例还提供了一种背光模组1及包括该背光模组1的液晶显示装置，其与第一实施例及图1所示的背光模组1结构类似，不同之处在于，背光模组1没有胶框12，发光组件13的电路板132与光学组件14之间没有设置弹性支撑柱16，结构简单、增大发光元件131在电路板132上的占用空间，提高背光模组1的亮度。尤其适用于较小尺寸的液晶显示装置，例如32英寸或者更小尺寸的液晶显示装置。
具体来说，光学组件14在背光板11上的正投影覆盖调节机构15在背光板11上的正投影。如此设置，可以减小背光模组1的长度尺寸。
当背光模组1的尺寸较小时，可以省去胶框12，有利于实现液晶显示装置的轻量化设计。另外，当背光模组1的尺寸较小时，光学组件14的中间位置不会因自身重力而向内凹陷，故发光组件13的电路板132与光学组件14之间也可以省去设置弹性支撑柱16。
可以理解的是，当发光元件131为Mini-LED或者Micro-LED时，由于相邻的两个发光元件131之间的距离较小，不便于放置弹性支撑柱16，故发光组件13的电路板132与光学组件14之间也可以省去设置弹性支撑柱16。
另外，光学组件14的光学膜片142与液晶显示面板2之间通过光学胶J固定连接，防止二者之间发生相对位移，提高背光模组1的出光效果。
进一步地，调节机构15包括固定部151和与固定部151可移动连接的调节部152，固定部151与背光板11的边缘连接，调节部152远离固定部151的一端抵接至光学组件14。
如图3所示，固定部151与背光板11的边缘一体成型，即固定部151由背光板11的边缘朝向液晶显示面板2凸出形成。调节部152可以为与固定部151螺纹连接的螺钉，调节部152抵接至扩散板141。通过旋转调节部 152，可以使调节部152相对于固定部151移动，进而调整背光板11与光学组件14之间的距离，即调整光学元件131的混光距离。
进一步地，调节部152朝向光学组件14的一侧设置有遮光层18。可选地，遮光层18为黑色胶带或者黑色胶条。遮光层18设置于调节部152朝向光学组件14的一侧，可以防止背光模组1在边缘处漏光。另外，液晶显示面板2的边缘处也设置有遮光层18，防止外界光线影响液晶显示面板2的显示效果。
进一步地，调节机构15朝向发光组件13的一侧以及电路板132与背光板之间11设置有反射层19，以使发光元件131照射到调光机构15上的光线反射至光学组件14，或者将从光学组件14反射至背光板之间11的光线再次反射至光学组件14，提高背光模组1的出光效率，最终增强背光模组1的背光亮度。
反射层19可以由塑性材料制备而成。例如，聚对苯二甲酸乙二醇酯(PET)、聚碳酸酯(PC)、聚苯乙桸(PS)等。反射层19还可以包括涂覆到塑性材料上的高反射涂层，例如，二氧化钛TiO 2，以增大光反射系数。
第四实施例
图4示出本申请第四实施例提供的背光模组及包括该背光模组的液晶显示装置的结构示意图。
如图4所示，本申请第四实施例还提供了一种背光模组1及包括该背光模组1的液晶显示装置，其与第三实施例及图3所示的背光模组1结构类似，不同之处在于，调节机构15的结构及位置不同。
具体来说，光学组件14对应于调节机构15的位置设置有凹槽14a，调节机构15的调节部152伸入凹槽14a，且与光学膜片142的出光面一侧平齐设置。
光学组件14的边缘上间隔设置有多个凹槽14a，多个调节机构15的调节部152伸入凹槽14a，并抵接至扩散板141。由此，光学组件14在背光板11上的正投影覆盖调节机构15在背光板11上的正投影。如此设置，可以减小背光模组1的长度尺寸。
另外，由于背光模组1的电路板132与光学组件14之间没有设置弹性 支撑柱16，结构简单、增大发光元件131在电路板132上的占用空间，提高背光模组1的亮度。
如图4所示，固定部151与背光板11的边缘一体成型，即固定部151由背光板11的边缘朝向液晶显示面板2凸出形成。调节部152包括支撑板和与支撑板连接的螺钉，螺钉穿过支撑板，并与固定部151螺纹连接。支撑板抵接至光学组件14的侧部，螺钉抵接至扩散板141朝向背光板11的一侧。通过旋转调节部152，可以使调节部152相对于固定部151移动，进而调整背光板11与光学组件14之间的距离，即调整光学元件131的混光距离。
进一步地，调节部152朝向光学组件14的一侧设置有遮光层18。可选地，遮光层18为黑色胶带或者黑色胶条。遮光层18设置于调节部152朝向光学组件14的一侧，可以防止背光模组1在边缘处漏光。另外，液晶显示面板2的边缘处也设置有遮光层18，防止外界光线影响液晶显示面板2的显示效果。
进一步地，调节机构15朝向发光组件13的一侧以及电路板132与背光板之间11设置有反射层19，以使发光元件131照射到调光机构15上的光线反射至光学组件14，或者将从光学组件14反射至背光板之间11的光线再次反射至光学组件14，提高背光模组1的出光效率，最终增强背光模组1的背光亮度。
反射层19可以由塑性材料制备而成。例如，聚对苯二甲酸乙二醇酯(PET)、聚碳酸酯(PC)、聚苯乙桸(PS)等。反射层19还可以包括涂覆到塑性材料上的高反射涂层，例如，二氧化钛TiO 2，以增大光反射系数。
第五实施例
图5示出本申请第五实施例提供的背光模组及包括该背光模组的液晶显示装置的结构示意图。
如图5所示，本申请第五实施例还提供了一种背光模组1及包括该背光模组1的液晶显示装置，其与前述第一至第四实施例及图1至图4所示的背光模组1结构类似，不同之处在于，背光模组1为曲面模组，相应地，背光板11及调节机构15的结构有所不同。
由于曲面背光模组1存在曲率，而发光组件13的电路板132为平板，当电路板132与曲面背光模组1的背光板11贴合时，电路板132的部分区域由于应力与背光板11剥离，从而导致发光元件131到扩散板141的混光距离发生变化，导致液晶显示装置呈现亮度不均匀的效果，影响显示效果。
为此，曲面背光模组1还包括锁紧机构17，锁紧机构17连接于电路板132与背光板11之间，防止电路板132与背光板11之间发生相对运动，确保发光元件131与扩散板141之间的混光距离在调节机构15调节至预设值后保持不变。
可选地，锁紧机构17为螺钉，电路板132上相邻的发光元件131之间设置有内嵌的螺母，螺钉穿过背光板11，并与电路板132上的螺母螺纹连接。
进一步地，胶框12包括可移动连接的第一胶框部121和第二胶框部122，第一胶框部121与一体成型，第二胶框部122与调节机构15的调节部152一体成型。
如图5所示，调节机构15的固定部151即为第一胶框部121，调节机构15的调节部152即为第二胶框部122，且第二胶框部122上设置有螺钉122a，第一胶框部121对应设置有与螺钉122a螺纹连接的内螺纹，通过旋转螺钉122a，即可使第二胶框部122相对于第一胶框部121移动。同时，第一胶框部121与背光板11的边缘通过卡扣111连接，第二胶框部122与光学组件14连接，从而可以调节背光板11与光学组件14之间的距离，进而调节发光元件131的混光距离。
相应地，胶框12的第二胶框部122朝向光学组件14的一侧设置有遮光层18，遮光层18为黑色胶带或者黑色胶条，以防止曲面背光模组1在边缘处漏光。
进一步地，第一胶框部121朝向发光组件13的一侧以及电路板132与背光板之间11设置有反射层19，以使发光元件131照射到调光机构15上的光线反射至光学组件14，或者将从光学组件14反射至背光板之间11的光线再次反射至光学组件14，提高背光模组1的出光效率，最终增强背光模组1的背光亮度。
反射层19可以由塑性材料制备而成。例如，聚对苯二甲酸乙二醇酯(PET)、聚碳酸酯(PC)、聚苯乙桸(PS)等。反射层19还可以包括涂覆到塑性材料上的高反射涂层，例如，二氧化钛TiO 2，以增大光反射系数。
第六实施例
图6示出本申请第六实施例提供的背光模组及包括该背光模组的液晶显示装置的结构示意图。
如图6所示，本申请第六实施例还提供了一种背光模组1及包括该背光模组1的液晶显示装置，其与第五实施例及图5所示的背光模组1结构类似，不同之处在于，调节机构15的结构不同。
具体来说，如图6所示，调节机构15的固定部151与背光板11的边缘一体成型，即固定部151由背光板11的边缘朝向液晶显示面板2凸出形成，胶框12与调节部152一体成型。即胶框12的一端与背光板11的边缘通过卡扣111连接，另一端与光学组件14连接，且胶框12上设置有调节部152，调节部152例如可以为螺钉，背光板11的边缘处设置有固定部151，调节部152与固定部151螺纹连接，从而可以调节背光板11与光学组件14之间的距离，进而调节发光元件131的混光距离。
相应地，胶框12朝向光学组件14的一侧设置有遮光层18，遮光层18为黑色胶带或者黑色胶条，以防止曲面背光模组1在边缘处漏光。
进一步地，胶框12朝向发光组件13的一侧即背光板11的固定部151朝向发光组件13的一侧设置有反射层19，以及电路板132与背光板之间11设置有反射层19，以使发光元件131照射到调光机构15上的光线反射至光学组件14，或者将从光学组件14反射至背光板之间11的光线再次反射至光学组件14，提高背光模组1的出光效率，最终增强背光模组1的背光亮度。
反射层19可以由塑性材料制备而成。例如，聚对苯二甲酸乙二醇酯(PET)、聚碳酸酯(PC)、聚苯乙桸(PS)等。反射层19还可以包括涂覆到塑性材料上的高反射涂层，例如，二氧化钛TiO 2，以增大光反射系数。
进一步地，曲面背光模组1还包括锁紧机构17，锁紧机构17连接于电路板132与背光板11之间，防止电路板132与背光板11之间发生相对运 动，确保发光元件131与扩散板141之间的混光距离在调节机构15调节至预设值后保持不变。
可选地，锁紧机构17为螺钉，电路板132上相邻的发光元件131之间设置有内嵌的螺母，螺钉穿过背光板11，并与电路板132上的螺母螺纹连接。
可以理解的是，本申请各实施例提供的背光模组1的技术方案可以广泛用于向各种液晶显示面板提供光源，如TN(Twisted Nematic，扭曲向列型)显示面板、IPS(In-Plane Switching，平面转换型)显示面板、VA(Vertical Alignment，垂直配向型)显示面板、MVA(Multi-Domain Vertical Alignment，多象限垂直配向型)显示面板。
应当容易地理解，应当按照最宽的方式解释本申请中的“在……上”、“在……以上”和“在……之上”，以使得“在……上”不仅意味着“直接处于某物上”，还包括“在某物上”且其间具有中间特征或层的含义，并且“在……以上”或者“在……之上”不仅包括“在某物以上”或“之上”的含义，还可以包括“在某物以上”或“之上”且其间没有中间特征或层(即，直接处于某物上)的含义。
文中使用的术语“层”可以指包括具有一定厚度的区域的材料部分。层可以在整个的下层结构或上覆结构之上延伸，或者可以具有比下层或上覆结构的范围小的范围。此外，层可以是匀质或者非匀质的连续结构的一个区域，其厚度小于该连续结构的厚度。例如，层可以位于所述连续结构的顶表面和底表面之间或者所述顶表面和底表面处的任何成对的横向平面之间。层可以横向延伸、垂直延伸和/或沿锥形表面延伸。衬底基板可以是层，可以在其中包括一个或多个层，和/或可以具有位于其上、其以上和/或其以下的一个或多个层。层可以包括多个层。例如，互连层可以包括一个或多个导体和接触层(在其内形成触点、互连线和/或过孔)以及一个或多个电介质层。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进 行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (18)

  1. 一种背光模组，包括背光板、发光组件和光学组件，所述发光组件位于所述背光板上，所述发光组件包括电路板和设置于所述电路板上的多个发光元件；所述光学组件位于所述发光组件远离所述背光板的一侧，所述光学组件在所述背光板上的正投影覆盖所述多个发光元件在所述背光板上的正投影，其中，
    所述背光模组还包括调节机构，所述调节机构设置于所述背光板的边缘与所述光学组件之间，通过改变自身长度调节所述发光元件与所述光学组件之间沿第一方向的距离，所述第一方向为所述发光元件的出光方向。
  2. 根据权利要求1所述的背光模组，其中，所述调节机构包括固定部和与所述固定部沿所述第一方向可移动连接的调节部，所述固定部与所述背光板的边缘连接，所述调节部远离所述固定部的一端抵接至所述光学组件。
  3. 根据权利要求2所述的背光模组，其中，所述固定部与所述背光板的边缘一体成型，所述调节部为与所述固定部螺纹连接的螺钉。
  4. 根据权利要求1所述的背光模组，其中，所述背光模组还包括胶框，所述胶框围绕所述背光板的边缘设置，所述调节机构设置于所述胶框与所述光学组件之间。
  5. 根据权利要求4所述的背光模组，其中，所述调节机构包括固定部和与所述固定部沿所述第一方向可移动连接的调节部，所述固定部与所述胶框连接，所述调节部远离所述固定部的一端抵接至所述光学组件。
  6. 根据权利要求5所述的背光模组，其中，所述固定部与所述胶框一体成型，所述调节部包括支撑板和穿过所述支撑板与所述固定部螺纹连接的螺钉，所述支撑板抵接至所述光学组件。
  7. 根据权利要求2或5所述的背光模组，其中，所述背光模组为平面模组，所述背光模组还包括沿自身轴向可伸缩的弹性支撑柱，所述弹性支撑柱沿自身轴向的一端与所述电路板连接，另一端抵接至所述光学组件。
  8. 根据权利要求7所述的背光模组，其中，所述弹性支撑柱为内部设置有弹簧的弹性顶针。
  9. 根据权利要求2或5所述的背光模组，其中，所述光学组件对应于所述调节机构的位置设置有凹槽，所述调节部伸入所述凹槽，且与所述光学组件的出光面一侧平齐设置。
  10. 根据权利要求1所述的背光模组，其中，所述光学组件在所述背光板上的正投影覆盖所述调节机构在所述背光板上的正投影。
  11. 根据权利要求2或5所述的背光模组，其中，所述背光模组为曲面模组，所述背光模组还包括锁紧机构，所述锁紧机构连接于所述电路板与所述背光板之间。
  12. 根据权利要求11所述的背光模组，其中，所述锁紧机构为螺钉，所述电路板上相邻的所述发光元件之间设置有内嵌的螺母，所述螺钉穿过所述背光板并与所述电路板上的所述螺母螺纹连接。
  13. 根据权利要求11所述的背光模组，其中，所述背光模组还包括胶框，所述胶框围绕所述背光板的边缘设置，所述胶框包括可移动连接的第一胶框部和第二胶框部，所述第一胶框部与所述固定部一体成型，所述第二胶框部与所述调节部一体成型。
  14. 根据权利要求1所述的背光模组，其中，还包括遮光层和反射层，所述遮光层设置于所述调节机构朝向所述光学组件的一侧，所述反射层设置于所述调节机构朝向所述发光组件的一侧。
  15. 根据权利要求1所述的背光模组，其中，还包括遮光层和反射层，所述遮光层设置于所述调节机构朝向所述光学组件的一侧，所述反射层设置于所述电路板与所述背光板之间。
  16. 根据权利要求1所述的背光模组，其中，所述光学组件包括扩散板和位于所述扩散板背离所述背光板一侧的光学膜片，所述扩散板和所述光学膜片之间通过透明的光学胶固定连接。
  17. 根据权利要求1所述的背光模组，其中，所述发光元件为发光二极管、微型发光二极管和亚毫米发光二极管中的任一者。
  18. 一种液晶显示装置，包括：
    液晶显示面板；和
    如权利要求1至17任一项所述的背光模组，设置于所述液晶显示面板 的背光面一侧，所述背光模组用于向所述液晶显示面板提供光源。
PCT/CN2022/136522 2021-12-24 2022-12-05 背光模组及液晶显示装置 WO2023116402A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202111598821.6A CN114280844B (zh) 2021-12-24 2021-12-24 背光模组及液晶显示装置
CN202111598821.6 2021-12-24

Publications (1)

Publication Number Publication Date
WO2023116402A1 true WO2023116402A1 (zh) 2023-06-29

Family

ID=80875754

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/136522 WO2023116402A1 (zh) 2021-12-24 2022-12-05 背光模组及液晶显示装置

Country Status (2)

Country Link
CN (1) CN114280844B (zh)
WO (1) WO2023116402A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116953989A (zh) * 2023-07-31 2023-10-27 惠科股份有限公司 背光模组和显示装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114280844B (zh) * 2021-12-24 2023-03-24 惠科股份有限公司 背光模组及液晶显示装置
CN115343883B (zh) * 2022-06-30 2024-09-06 惠科股份有限公司 背光模组及显示装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060285311A1 (en) * 2005-06-19 2006-12-21 Chih-Li Chang Light-emitting device, backlight module, and liquid crystal display using the same
CN102767755A (zh) * 2012-06-26 2012-11-07 达运精密工业（苏州）有限公司 背光模组及显示装置
CN205754607U (zh) * 2016-05-30 2016-11-30 深圳Tcl新技术有限公司 一种平板电视
CN205824702U (zh) * 2016-06-21 2016-12-21 广州创维平面显示科技有限公司 一种直下式led背光模组开发平台
CN110632792A (zh) * 2019-08-28 2019-12-31 武汉华星光电技术有限公司 背光模组及车载显示装置
CN209992783U (zh) * 2019-06-28 2020-01-24 深圳创维－Rgb电子有限公司 一种背光模组及显示装置
CN114241919A (zh) * 2021-12-29 2022-03-25 重庆惠科金渝光电科技有限公司 背光模组和显示设备
CN114280844A (zh) * 2021-12-24 2022-04-05 惠科股份有限公司 背光模组及液晶显示装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103090271A (zh) * 2013-01-24 2013-05-08 青岛海信电器股份有限公司 一种新型直下式背光模组及液晶电视
CN207833189U (zh) * 2018-03-08 2018-09-07 广州林电智能科技有限公司 一种直下式led背光板
CN110908185A (zh) * 2019-11-25 2020-03-24 惠州市华星光电技术有限公司 背光模组及液晶显示装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060285311A1 (en) * 2005-06-19 2006-12-21 Chih-Li Chang Light-emitting device, backlight module, and liquid crystal display using the same
CN102767755A (zh) * 2012-06-26 2012-11-07 达运精密工业（苏州）有限公司 背光模组及显示装置
CN205754607U (zh) * 2016-05-30 2016-11-30 深圳Tcl新技术有限公司 一种平板电视
CN205824702U (zh) * 2016-06-21 2016-12-21 广州创维平面显示科技有限公司 一种直下式led背光模组开发平台
CN209992783U (zh) * 2019-06-28 2020-01-24 深圳创维－Rgb电子有限公司 一种背光模组及显示装置
CN110632792A (zh) * 2019-08-28 2019-12-31 武汉华星光电技术有限公司 背光模组及车载显示装置
CN114280844A (zh) * 2021-12-24 2022-04-05 惠科股份有限公司 背光模组及液晶显示装置
CN114241919A (zh) * 2021-12-29 2022-03-25 重庆惠科金渝光电科技有限公司 背光模组和显示设备

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116953989A (zh) * 2023-07-31 2023-10-27 惠科股份有限公司 背光模组和显示装置

Also Published As

Publication number Publication date
CN114280844B (zh) 2023-03-24
CN114280844A (zh) 2022-04-05

Similar Documents

Publication Publication Date Title
CN112015000B (zh) 背光模块及显示装置
KR102003038B1 (ko) 광학 필름 및 이를 포함하는 표시 장치
WO2023116402A1 (zh) 背光模组及液晶显示装置
EP2560035B1 (en) Backlight assembly and display apparatus having the same
US9316864B2 (en) Liquid crystal display device
US7911559B2 (en) Illuminating device and display using the same
KR102599038B1 (ko) 유리 확산판을 갖는 액정표시장치
US8908124B2 (en) Light guide plate and liquid crystal display device including the same
KR100999011B1 (ko) 백라이트 유닛과 이를 이용한 액정표시장치
US9435927B2 (en) Guide plate and backlight assembly including the same
EP4443224A1 (en) Backlight module and display apparatus
KR20180057942A (ko) 액정표시장치
US20180157115A1 (en) Edge-lit backlight device and liquid crystal display device
WO2021190414A1 (zh) 一种显示装置
CN114967228A (zh) 背光模组及显示装置
US20080062720A1 (en) Backlight assembly and display apparatus having the same
US20080136997A1 (en) Liquid crystal display device
KR20140047381A (ko) 백라이트 유닛 및 이를 포함하는 액정표시장치
JP4781797B2 (ja) 液晶表示装置
KR102045811B1 (ko) 표시장치
KR102020933B1 (ko) 유리 확산판, 그 유리 확산판을 이용한 백라이트 유닛 및 그 백라이트 유닛을 이용한 액정표시장치
US20150168765A1 (en) Lcd device
WO2017124593A1 (zh) 显示装置及显示终端
KR102002458B1 (ko) 액정표시장치
KR101829857B1 (ko) 액정표시장치

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22909717

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205 DATED 05/11/2024)