WO2021070993A1 - Dispositif d'affichage - Google Patents

Dispositif d'affichage Download PDF

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Publication number
WO2021070993A1
WO2021070993A1 PCT/KR2019/013362 KR2019013362W WO2021070993A1 WO 2021070993 A1 WO2021070993 A1 WO 2021070993A1 KR 2019013362 W KR2019013362 W KR 2019013362W WO 2021070993 A1 WO2021070993 A1 WO 2021070993A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens
display device
reflector
curvature
printed circuit
Prior art date
Application number
PCT/KR2019/013362
Other languages
English (en)
Korean (ko)
Inventor
이길훈
Original Assignee
엘지전자 주식회사
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 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to PCT/KR2019/013362 priority Critical patent/WO2021070993A1/fr
Publication of WO2021070993A1 publication Critical patent/WO2021070993A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133605—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
    • G02F1/133628—Illuminating devices with cooling means

Definitions

  • It relates to a display device capable of minimizing interference between a reflector and a lens.
  • a display device is a type of output device that converts acquired or stored electrical information into visual information and displays it to a user, and is used in various fields such as homes and businesses.
  • a display device As a display device, a monitor device connected to a personal computer or a server computer, a portable computer device, a navigation terminal device, a general television device, an Internet Protocol television (IPTV) device, a smart phone, a tablet PC, etc.
  • IPTV Internet Protocol television
  • PDA Personal Digital Assistant
  • portable terminal devices such as cellular phones, various display devices used to reproduce images such as advertisements or movies in industrial sites, or various types of audio/video systems Etc.
  • the display device can display a still image or a moving image to a user using various types of display means.
  • a display means a cathode ray tube, a light emitting diode, an organic light emitting diode, an active organic light emitting diode, a liquid crystal or electronic paper, etc. can be used. have.
  • the back light unit of a conventional liquid crystal display device is largely a direct-type that directly dims the backlight in the front direction through the opening of the reflector sheet and in the lateral direction. It can be classified as an edge-type that dims the backlight.
  • An object of the present invention is to provide a display device that minimizes image quality deterioration and luminance loss in consideration of a shrinkage amount due to an increase in temperature of a reflector.
  • Another object of the present invention is to provide a display device capable of uniformly dimming the backlight by adjusting the reflectance of the backlight according to the position of the display screen.
  • a display device includes: a printed circuit board; A light source mounted on the upper surface of the printed circuit board; A reflecting sheet covering the printed circuit board and including an opening formed at a position corresponding to the light source; A lens disposed above the light source by a predetermined distance from the printed circuit board; A lens support portion provided between the lens and the printed circuit board to support the lens, and a circumference of the opening may include a first curved portion and a second curved portion having a smaller curvature than the first curved portion. have.
  • the second curved portion may be recessed in a centrifugal direction than the first curved portion corresponding to the lens support portion.
  • the second curved portion may have a shape corresponding to the circumferential shape of the lens support portion.
  • the second curved portion may be formed at a position corresponding to a contraction direction according to a temperature change of the reflector.
  • the second curvature portion may be disposed in a first direction in which a shrinkage amount according to a temperature change of the reflector is greatest.
  • the first curvature portion is disposed in a first direction with a largest shrinkage amount due to a temperature change of the reflector, and is spaced apart from the edge of the lens at a first interval, and the second curvature portion is in a second direction perpendicular to the first direction. Can be placed.
  • the first curved portion is spaced apart from the edge of the lens at a first interval
  • a plurality of the second curved portions may be disposed along the periphery of the opening.
  • the second curvature may be disposed on a first axis passing through the center of the lens and the center of the lens support.
  • the plurality of second curvature portions are spaced between the second curvature portions positioned in the first direction where the shrinkage amount according to the temperature of the reflector is greatest, between the second curved portions positioned in the second direction perpendicular to the first direction. It can be narrower than the gap.
  • the reflector may further include a seating portion protruding in a predetermined length in a centripetal direction of the opening to mount the lens on an upper surface.
  • the seating portion may protrude perpendicular to a direction in which the amount of contraction according to the temperature of the reflector is greatest.
  • the first curved portions may be spaced apart from the edge of the lens at a first interval, and the openings may be formed in a plurality at predetermined intervals corresponding to each area of the display screen.
  • the first interval may vary according to the position of the display screen.
  • the first interval may increase toward an edge of the display screen.
  • the first interval may decrease toward an edge of the display screen.
  • FIG. 1 is a perspective view of a display device related to the present invention.
  • FIG. 2 is an exploded perspective view of the display device of FIG. 1.
  • FIG. 3 is a diagram illustrating a backlight unit of a display device according to an embodiment of the present invention.
  • FIG. 4 is a diagram illustrating interference between a reflector of FIG. 3 and a lens support.
  • FIG. 5 is a diagram illustrating a lens avoiding type backlight unit of a display device according to another exemplary embodiment of the present invention.
  • FIG. 6 is a diagram illustrating a lens avoiding type backlight unit according to another embodiment of the present invention.
  • FIG. 7 is a diagram illustrating a lens fixing type backlight unit of a display device according to another exemplary embodiment of the present invention.
  • FIG. 1 is a perspective view of a display device 1000 related to the present invention.
  • 2 is an exploded perspective view of the display device 1000 of FIG. 1.
  • the display device 1000 refers to a device capable of processing an image signal received from the outside and visually displaying the processed image.
  • the display device 1000 may be implemented in various forms, such as a television, a monitor, a portable multimedia device, and a portable communication device, and the form of the display device 1000 is not limited as long as it is a device that visually displays an image. .
  • the display device 1000 includes a decor frame 1100, a display panel 1200, a middle cabinet 1300, an optical sheet 1400, a diffusion plate 1500, a reflector 1600, an LED array assembly 1700, and a cover assembly. (1800) may be included.
  • the configuration of the display apparatus 1000 according to an exemplary embodiment is not limited to the above example, and some configurations may be omitted or other configurations may be further included.
  • the display panel 1200 may display various images according to an image signal input from the outside. At this time, in the display panel 1200, a plurality of pixels constituting the display panel 1200 generate light by themselves, so that the light emitting display panel 1200 that generates an image, or a plurality of pixels reflects/transmits/blocks the light. By doing so, it may be any one of the non-light-emitting display panels 1200 that generate an image.
  • the display panel 1200 will be described on the assumption that it is a non-light-emitting display panel 1200 that generates an image by reflecting/transmitting/blocking light emitted from the backlight unit. Meanwhile, although not shown in the drawing, the display panel 1200 may include a liquid crystal layer, a transparent electrode layer, a transparent substrate, and a color filter.
  • the backlight unit is installed behind the display panel 1200, and the display panel 1200 may generate light for generating an image.
  • the type of the backlight unit may be classified according to where the light source 1720 is located.
  • the backlight unit includes an edge type BLU in which the light source 1720 is located at the side and a direct type backlight unit in which the light source 1720 is located at the rear of the display panel 1200. type BLU).
  • the backlight unit described below will be described on the assumption that the light source 1720 is a direct type backlight unit positioned behind the display panel 1200.
  • the backlight unit may include an LED array assembly 1700 and a reflector 1600.
  • the LED array assembly 1700 is provided at the rear of the display panel 1200 and provides light necessary for generating an image of the display panel 1200. As described below, the LED array assembly 1700 may include a printed circuit board 1710, a lens 1730, and a light source 1720.
  • the reflector 1600 is provided between the LED array assembly 1700 and the display panel 1200 to receive light emitted from the light source 1720 of the LED array assembly 1700. Reflect.
  • the reflector 1600 includes an opening 1610 corresponding to the light source 1720 of the LED array assembly 1700, and passes through the opening 1610 to the inside of the display device 1000. The diffused light is reflected in the front direction.
  • the reflector 1600 may be implemented in a flat shape, but both ends may be implemented in a shape inclined toward the display panel 1200.
  • the decor frame 1100, the middle cabinet 1300, the optical sheet 1400, the diffusion plate 1500, and the cover assembly 1800 constituting the display device 1000 are well known to those skilled in the art, a detailed description thereof will be provided. Omit it.
  • the display devices of FIGS. 3 to 7 include the display devices of FIGS. 1 and 2.
  • an upward direction described in FIGS. 3 to 7 may be a front direction of the display apparatus 1000, and a downward direction may be a rear direction of the display apparatus 1000.
  • the upper surface described below may be a surface located in the front direction of the display apparatus 1000, and the lower surface may be a surface located in the rear direction of the display apparatus 1000.
  • FIG 3 is a diagram illustrating a backlight unit of the display apparatus 1000 according to an exemplary embodiment.
  • Fig. 3(a) is a diagram showing an upper surface of a backlight unit.
  • 3(b) is a diagram showing a cross section of a backlight unit.
  • the display apparatus 1000 may include a backlight unit.
  • the backlight unit may include a printed circuit board 1710, a light source 1720, a lens 1730, a lens support 1740, and a reflector 1600.
  • the printed circuit board 1710, the light source 1720, the lens 1730, and the lens support 1740 may be implemented as the LED array assembly 1700 of FIG. 2.
  • the printed circuit board 1710 mounts at least one light source 1720 on an upper surface of the printed circuit board 1710.
  • a plurality of printed circuit boards 1710 may be provided.
  • a plurality of printed circuit boards 1710 in the form of long bars may be provided on the rear surface of the reflective plate 1600 at predetermined intervals.
  • An electrode pattern or a circuit pattern may be formed on the printed circuit board 1710, and the light source 1720 and the printed circuit board 1710 may be subjected to a method such as wire bonding or flip chip bonding. It can be electrically connected through.
  • the printed circuit board 1710 includes a flexible printed circuit board 1710.
  • the light source 1720 is an element that emits light and is mounted on the upper surface of the printed circuit board 1710.
  • the light source 1720 includes not only a Light Emitting Semiconductor (LED), but also all elements, devices, etc. that generate and emit light.
  • a plurality of light sources 1720 may be provided at regular intervals for uniform dimming.
  • the light source 1720 is positioned on the lower surface of the reflective plate 1600, and light emitted from the light source 1720 is emitted through a lens 1730 provided to cover at least a part of the opening 1610 of the reflective plate 1600.
  • the lens 1730 is provided above the light source 1720 so that the light source 1720 is located at the center.
  • the lens 1730 may be provided in parallel with the reflector 1600 or on the upper side of the reflector 1600.
  • the distance between the lower surface of the lens 1730 and the upper surface of the printed circuit board 1710 may be greater than or equal to the distance between the lower surface of the reflector 1600 and the printed circuit board 1710.
  • the lens 1730 may be provided to cover the opening 1610 of the reflector 1600.
  • a portion of the lower surface of the lens 1730 corresponding to the light source 1720 may be recessed upward to form a groove 1173 for diffusion of light.
  • the lens support 1740 is provided between the lens 1730 and the printed circuit board 1710 to support the lens 1730.
  • the lens support 1740 may be provided to be spaced apart from the edge of the lens 1730 by a predetermined interval inward.
  • the lens support 1740 may be provided on the lower surface of the lens 1730 at regular intervals along the circumferential direction of the lens 1730.
  • the lens support 1740 may be provided at 90 degree angles along the circumferential direction with respect to the center of the lens 1730.
  • the spacing between the lens support parts 1740 may vary depending on the contraction direction of the reflective plate 1600.
  • the lens support 1740 may be integrally formed with the lens 1730.
  • the lens support part 1740 may be formed such that a portion of the lower surface of the lens 1730 protrudes toward the printed circuit board 1710.
  • the reflector 1600 covers the printed circuit board 1710 and includes an opening 1610 at a position corresponding to the light source 1720.
  • the light passing through the opening 1610 is diffused into the display device 1000 by an optical sheet or a diffusion plate, and the light is reflected back to the front direction of the display device 1000 by the reflecting plate 1600.
  • the reflector 1600 may be made of a metal material or a polyethylene terephthalate (PET)-based resin.
  • the opening 1610 of the reflector 1600 is formed so that the light source 1720 is located at the center.
  • the light source 1720 and the lens 1730 may be disposed such that their centers are positioned on a virtual vertical axis passing through the center of the opening 1610.
  • the diameter of the opening 1610 is slightly larger than the diameter of the lens 1730 to minimize exposure of members positioned in the lower surface direction of the reflective surface.
  • At least a portion of the circumference of the opening 1610 may be spaced apart from the lens 1730.
  • the circumference of the opening 1610 may include at least one curved portion.
  • FIG. 4 is a diagram illustrating interference between the reflector 1600 of FIG. 3 and the lens support 1740.
  • Fig. 4(a) is a diagram showing a lens avoiding type backlight unit.
  • 4B is a view showing a lens-fixed type backlight unit.
  • the lens avoidance type is a type in which the circumference of the opening 1610 of the reflector 1600 does not contact the lens 1730.
  • the lens fixing type is a type in which a part of the periphery of the opening 1610 of the reflector 1600 protrudes in the centripetal direction of the opening 1610 to support and fix the lens 1730.
  • the reflector 1600 may be made of a PET material.
  • the reflector 1600 made of a PET material may have a property of shrinking as the temperature of the display device 1000 increases due to a characteristic during a processing process.
  • the reflector 1600 may be contracted by 2mm to 3mm per 1000mm according to the temperature increase.
  • the amount of shrinkage according to a specific direction of the reflector 1600 may vary depending on a manufacturing process and components.
  • the amount of contraction in the first direction may be greater than the amount of contraction in the second direction.
  • the first direction may be a direction in which the reflector 1600 made of PET material is extruded during a manufacturing process.
  • the diameter of the opening 1610 is formed larger than the diameter of the lens 1730, so that the lens 1730 and the reflector 1600 do not contact each other.
  • the size of the opening 1610 decreases, causing contact or interference with the lens 1730 or the lens support 1740, thereby reducing luminance loss or deterioration of image quality. Will cause.
  • a portion of the periphery of the opening 1610 is formed to be positioned on the lower surface of the lens 1730.
  • another part of the periphery of the opening 1610 may be spaced apart from the edge of the lens 1730 at a relatively wider interval than in the case of FIG. 4A in correspondence with the contraction direction of the reflective plate 1600.
  • left and right circumferences of the circumferences of the opening 1610 may be spaced apart from the edge of the lens 1730.
  • contraction of the reflector 1600 may occur simultaneously in the first direction and in the second direction perpendicular thereto.
  • the first direction may be a left-right direction
  • the second direction may be an up-down direction. Accordingly, as in the case of FIG. 4(a), when the temperature of the display apparatus 1000 increases, the size of the opening 1610 decreases to cause contact or interference with the lens 1730 or the lens support 1740. And, it causes a problem of loss of luminance or deterioration of image quality.
  • the shape of the opening 1610 for preventing interference between the reflective plate and the lens 1730 or the lens support 1740 is required.
  • FIG. 5 is a diagram illustrating a lens avoidance type backlight unit of the display apparatus 1000 according to another exemplary embodiment of the present invention.
  • the reflector 1600 may have an opening 1610 formed at a position corresponding to the light source 1720.
  • the entire circumference of the opening 1610 may be provided to be spaced apart from the lens 1730.
  • the periphery of the opening 1610 may include a first curved portion 1610a and a second curved portion 1610b.
  • the first curved portion 1610a may be spaced apart from the edge of the lens 1730 at a first interval.
  • the first curved portion 1610a has a curvature corresponding to the curvature of the edge of the lens 1730.
  • the center of curvature of the first curved portion 1610a may be located at the center of the opening 1610 or the lens 1730.
  • the first curved portion 1610a may be spaced apart from the edge of the lens 1730 at regular intervals along the circumferential direction of the lens 1730.
  • the first curved portion 1610a may be formed at a position corresponding to the contraction direction of the reflective plate 1600.
  • the second curved portion 1610b has a smaller curvature than the first curved portion 1610a.
  • the second curved portion 1610b may have a shape recessed from the periphery of the opening 1610 in a centrifugal direction.
  • the second curved portion 1610b may have a shape corresponding to the lens support portion 1740.
  • the second curved portion 1610b may be formed to have a curvature corresponding to the curvature of the circumference of the lens support portion 1740.
  • the second curved portion 1610b may be spaced apart from the edge of the lens 1730 at a second interval.
  • the second interval may be larger than the first interval.
  • a plurality of second curved portions 1610b may be disposed along the edge of the lens 1730 at predetermined intervals.
  • the second curved portions 1610b may be disposed every 90 degrees along the circumferential direction with respect to the center of the opening 1610.
  • the center of curvature of the second curved portion 1610b may be positioned between the edge of the lens 1730 and the first curved portion 1610a.
  • the second curved portion 1610b may be provided in a direction corresponding to the contraction direction of the reflective plate 1600.
  • the second curvature 1610b makes the center of the lens 1730 and the center of the lens support 1740 It may be disposed on the first axis passing through.
  • the second curved portion 1610b may have a diameter corresponding to the length of the reflective plate 1600.
  • the length of the reflective plate 1600 when the length of the reflective plate 1600 is 1000 mm or less, it may have a diameter of 3 mm.
  • the length of the reflector 1600 when the length of the reflector 1600 is more than 1000mmm and less than 1500mm, it may have a diameter of 4mm.
  • the length of the reflector exceeds 1500mm, it may have a diameter of 5mm.
  • FIG. 6 is a diagram illustrating a lens avoiding type backlight unit according to another embodiment of the present invention.
  • 6(a) is a diagram showing the arrangement of the second curved portion 1610b when the amount of contraction in the first direction is large.
  • 6B is a view showing the arrangement of the second curved portion 1610b when the amount of contraction in the second direction is large.
  • a plurality of second curved portions 1610b may be provided at positions corresponding to a contraction direction according to a temperature change of the reflective plate 1600.
  • the spacing between the plurality of second curved portions 1610b may vary according to the contraction direction of the reflective plate 1600.
  • an interval between the second curved portions 1610b positioned in the direction in which the shrinkage amount of the reflective plate 1600 is the largest may be formed to be narrower than the interval between the second curved portions 1610b positioned in the other direction.
  • the first direction may be an up-down direction
  • the second direction may be a left-right direction.
  • the distance between the second curved portions 1610b positioned in the first direction is the second curved portion 1610b positioned in the first direction. 2 It may be formed to be narrower than the interval between the curved portions (1610b).
  • the distance between the second curved portions 1610b positioned in the second direction is the second curved portion 1610b positioned in the second direction. 2 It may be formed to be narrower than the interval between the curved portions (1610b).
  • FIG. 7 is a diagram illustrating a lens-fixing type backlight unit of the display apparatus 1000 according to another exemplary embodiment of the present invention.
  • 7(a) is a diagram showing the arrangement of the second curved portion 1610b when the amount of contraction in the first direction is large.
  • 7(b) is a diagram showing the arrangement of the second curved portion 1610b when the amount of contraction in the second direction is large.
  • the reflecting plate 1600 protrudes to a predetermined length in the centripetal direction of the opening 1610 so as to mount the lens 1730 on the upper surface. It may further include. Accordingly, the seating portion 1610c covers a part of the lower surface of the lens 1730, and a part of the circumference of the opening 1610 is located at the lower surface of the lens 1730.
  • the seating portion 1610c may be formed to protrude perpendicular to the direction in which the amount of contraction according to the temperature of the reflector 1600 is greatest.
  • the seating portions 1610c may be provided on the upper and lower sides of the opening 1610.
  • the first curved portions 1610a located on the left and right sides of the opening 1610 may be spaced apart at a wider interval than in the case of the lens avoidance type in order to compensate for the area of the opening 1610 covered by the seating portion 1610c. I can.
  • the first curved portion 1610a may be provided in a second direction perpendicular to the first direction in which the amount of contraction of the reflective plate 1600 is greatest.
  • the right and first curved portions 1610a having the largest shrinkage in the vertical direction may be disposed on the left and right sides of the opening 1610.
  • a plurality of second curved portions 1610b may be provided at both ends of the first curved portion 1610a to correspond to contraction in the first direction and the second direction. Like the lens avoidance type, a plurality of second curved portions 1610b may be provided at positions corresponding to a contraction direction according to a temperature change of the reflective plate 1600. The spacing between the plurality of second curved portions 1610b may vary according to the contraction direction of the reflective plate 1600.
  • the interval between the second curved portions 1610b positioned in the first direction is the interval between the second curved portions 1610b positioned in the second direction It can be formed narrower.
  • a plurality of openings 1610 of the reflector 1600 may be formed at predetermined intervals corresponding to each area of the display screen.
  • the opening 1610 may be formed in a matrix shape along a first direction and a second direction perpendicular to the first direction.
  • the first interval of each opening 1610 may vary according to the position of the display screen.
  • the first interval may be a distance between the circumference of the opening 1610 and the lens 1730.
  • the first interval may increase toward the edge of the display screen. This is because the amount of shrinkage of the reflector 1600 increases toward the edge.
  • the first interval may decrease toward an edge of the display screen. This is to compensate for the decrease in luminance due to the smaller number of adjacent light sources 1720 toward the edge of the display screen.

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

Abstract

Selon la présente invention, un dispositif d'affichage peut réduire au minimum la dégradation de qualité d'image et la perte de luminance en considérant le retrait en fonction d'une élévation de température d'une feuille réfléchissante, le dispositif d'affichage comprenant : une carte de circuit imprimé ; une source de lumière chargée sur la surface supérieure de la carte de circuit imprimé ; la feuille réfléchissante recouvrant la carte de circuit imprimé et comprenant une partie d'ouverture formée à un emplacement correspondant à la source de lumière ; une lentille disposée au-dessus de la source de lumière de manière à être espacée à une distance prédéterminée de la carte de circuit imprimé ; et une partie de support de lentille disposée entre la lentille et la carte de circuit imprimé de façon à soutenir la lentille, la circonférence de la partie d'ouverture comprenant une première partie de courbure et une seconde partie de courbure ayant une courbure inférieure à celle de la première partie de courbure.
PCT/KR2019/013362 2019-10-11 2019-10-11 Dispositif d'affichage WO2021070993A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114724467A (zh) * 2022-05-11 2022-07-08 武汉华星光电半导体显示技术有限公司 曲面显示屏及移动终端

Citations (5)

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