WO2020218719A1 - Dispositif d'affichage - Google Patents

Dispositif d'affichage Download PDF

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Publication number
WO2020218719A1
WO2020218719A1 PCT/KR2020/001165 KR2020001165W WO2020218719A1 WO 2020218719 A1 WO2020218719 A1 WO 2020218719A1 KR 2020001165 W KR2020001165 W KR 2020001165W WO 2020218719 A1 WO2020218719 A1 WO 2020218719A1
Authority
WO
WIPO (PCT)
Prior art keywords
diffusion
light
guide plate
display panel
light guide
Prior art date
Application number
PCT/KR2020/001165
Other languages
English (en)
Korean (ko)
Inventor
강기형
Original Assignee
삼성전자주식회사
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 삼성전자주식회사 filed Critical 삼성전자주식회사
Publication of WO2020218719A1 publication Critical patent/WO2020218719A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0051—Diffusing sheet or layer
    • 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
    • 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
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side

Definitions

  • the present invention relates to a display device including a light guide plate provided to guide light incident from a light source module.
  • a display device is a type of output device that converts electrical information into visual information and displays it to a user. Not only a television, a monitor device, but also various portable terminal devices, for example, a smart phone, a tablet PC ( tablet PC), etc.
  • the display device includes a display device using a cathode ray tube, a display device using a light emitting diode, a display device using an organic light emitting diode, and an active organic light emitting diode (Active-Matrix Organic).
  • a display device using a Light Emitting Diode), a liquid crystal display device, or an electronic paper display device may be included.
  • the liquid crystal display device may use a backlight method, that is, a transparent display device, in which an image is displayed by a backlight unit providing light from the rear of the transparent display panel.
  • a backlight method that is, a transparent display device, in which an image is displayed by a backlight unit providing light from the rear of the transparent display panel.
  • the transparent display device can see all situations in front of and behind the display panel while viewing display information or a screen. Accordingly, the transparent display device may be used in a street or store showcase, a front door of a home appliance, a glass window, a desk, and the like.
  • a reflective display device capable of using ambient light as a light source may be used.
  • a light guide plate may be disposed in front of the display panel.
  • the light guide plate may include a pattern configured to scatter light emitted from a light source.
  • the pattern of the light guide plate In the light guide plate disposed in front of the display panel, the pattern of the light guide plate must not be visually recognized from the outside, and for this purpose, the pattern size needs to be small within 10 ⁇ m, so it may not be easy to manufacture the pattern.
  • the light scattered from the light guide plate can be directly projected to the viewer, the light scattered from the light guide plate needs to be emitted to the display panel disposed behind the light guide plate rather than in front of the light guide plate.
  • the present invention provides a display device including an improved light guide plate to improve the visibility of the display panel.
  • the present invention provides a display device including a light guide plate improved to increase light efficiency and light uniformity.
  • the display device includes a display panel, a light guide plate provided to guide light emitted from a light source module to the display panel, and a diffusion part provided on the light guide plate to diffuse or transmit light according to an angle of incident light. can do.
  • the diffusion unit may be configured to diffuse light incident on the diffusion unit at a first angle and transmit light incident on the diffusion unit at a second angle.
  • the first angle may be 45 degrees or less based on the vertical direction.
  • the diffusion part may be disposed on one side of the light guide plate facing the display panel.
  • the display panel may include a transparent display panel, and the diffusion part may be disposed behind the transparent display panel.
  • the display panel may include a reflective display panel, and the diffuser may be disposed in front of the reflective display panel.
  • the diffusion unit may include a case and a diffusion member provided inside the case to diffuse light incident on the case.
  • the diffusion member may include a louver member configured to linearly diffuse light incident on the case.
  • the diffusion member may include a cylindrical member configured to circularly diffuse light incident on the case.
  • the diffusion member may be inclined.
  • the cylindrical member may be bent.
  • the diffusion member may include a first diffusion member and a second diffusion member disposed above the first diffusion member.
  • the first diffusion member may be inclined, and the second diffusion member may include a cylindrical member.
  • the diffusion part may include an asymmetric diffusion pattern.
  • the diffusion member may be provided in plural.
  • the display device includes a transparent display panel, a light guide plate provided to guide light emitted from a light source module to the transparent display panel, and an angle of incident light disposed behind the transparent display.
  • a diffusion part provided in the light guide plate to diffuse light according to the present invention, and the diffusion part may include a case and a diffusion member provided inside the case to diffuse light incident to the case.
  • the diffusion member may include a louver member configured to linearly diffuse light incident on the case, and a cylindrical member configured to circularly diffuse light incident on the case.
  • the diffusion member may be provided in plural.
  • the display device includes a reflective display panel, a light guide plate provided to guide light emitted from a light source module to the reflective display panel, and is disposed in front of the reflective display panel, and has a first angle. It may include a diffusion unit provided on the light guide plate to diffuse the incident light and transmit the incident light at a second angle.
  • the diffusion unit may include a plurality of asymmetric diffusion patterns provided between the reflective display panel and the light guide plate.
  • the visibility of the display panel may be improved by the diffusion part provided in the light guide plate.
  • the present invention includes a diffusion member provided to diffuse or transmit light according to the angle of light incident on the diffusion unit, thereby improving light efficiency and light uniformity.
  • FIG. 1 is a perspective view of a display device according to the present invention.
  • FIG. 2 is an exploded view of a display device according to the present invention.
  • FIG 3 is a cross-sectional view of a transparent display panel and a backlight unit in a display device according to an embodiment of the present invention.
  • FIG. 4 is a diagram illustrating a diffusion unit including a louver member in a display device according to an embodiment of the present invention.
  • FIG. 5 is a diagram illustrating a diffusion unit including a cylindrical member in a display device according to another exemplary embodiment of the present invention.
  • FIG. 6 is a diagram illustrating a diffusion unit in a display device according to another exemplary embodiment of the present invention.
  • FIG. 7 is a diagram illustrating a diffusion unit in a display device according to another exemplary embodiment of the present invention.
  • FIG. 8 is a diagram illustrating a diffusion unit in a display device according to another exemplary embodiment of the present invention.
  • FIG. 9 is a diagram illustrating a diffusion unit in a display device according to another exemplary embodiment of the present invention.
  • FIG. 10 is a diagram illustrating a diffusion unit in a display device according to another exemplary embodiment of the present invention.
  • FIG. 11 is a diagram illustrating a diffusion unit in a display device according to another exemplary embodiment of the present invention.
  • FIG. 12 is a cross-sectional view of a reflective display panel and a backlight unit in a display device according to another embodiment of the present invention.
  • a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.
  • the term "and/or" includes a combination of a plurality of related stated items or any of a plurality of related stated items.
  • the display device 1 may include a device that displays an image, such as a television, a monitor, and a display device of a mobile communication terminal.
  • the display device 1 may display an image and output sound. Here, the sound can be output through an external device.
  • the display device 1 may be supported by a stand 2 mounted at the bottom, and may be installed on a wall by a separate bracket.
  • the display device 1 may include a display panel 10, a backlight unit 20, and a housing 30.
  • the backlight unit 20 may include a light source module 21 (refer to FIG. 3 ), a light guide plate 22, and a bottom chassis 23.
  • the display panel 10 is a panel that displays image information such as letters, numbers, and arbitrary icons by adjusting the transmittance of light passing through the liquid crystal layer, and may include a large panel of approximately 60 inches or more.
  • the transmittance of light passing through the liquid crystal layer may be adjusted according to the intensity of the applied voltage.
  • the display panel 10 may include a color filter panel, a thin film transistor array panel (TFT), a liquid crystal layer, and a sealant.
  • the color filter panel and the TFT panel may be made of a glass material.
  • the color filter panel may include red, green, and blue color filters formed in regions corresponding to the pixel electrodes of the TFT panel so that colors are displayed for each pixel.
  • a common electrode made of a transparent conductive material such as Indium Tin Oxide (ITO) or Indium Zinc Oxide (IZO) may be formed on the color filter panel.
  • the backlight unit 20 may include a light source module 21 that emits light from a lower portion of the display panel 10.
  • the light source module 21 may include a light source (not shown) and a substrate (not shown) that drives the light source (not shown) to output light.
  • the light source may include a light emitting diode (LED) that generates light with high efficiency and low power.
  • the light emitting diode may be provided in the form of a package in which a chip is mounted on a substrate (not shown) and filled with a resin.
  • a cold cathode fluorescent lamp (CCFL) or an external electrode fluorescent lamp (EEFL) may be used as a light source (not shown).
  • the substrate (not shown) supplies or cuts off power applied to the light-emitting diode or controls the amount of power supplied to the light-emitting diode, and may include a printed circuit board (PCB) on which a plurality of light-emitting diodes are electrically mounted. .
  • PCB printed circuit board
  • a plurality of light sources may be spaced apart and mounted on a substrate (not shown) at predetermined intervals.
  • the bottom chassis 23 is a panel that connects various components required for image display and sound output, and a substrate (not shown) and an input/output device may be mounted on the bottom chassis 23.
  • the bottom chassis 23 is one of components constituting the backlight unit 20 and may serve to support other components constituting the backlight unit 20.
  • the bottom chassis 23 may be made of a metal having excellent heat dissipation and strength.
  • a driving module for driving the display panel 10 and the backlight unit 20 may be disposed on the bottom chassis 23.
  • the bottom chassis 23 may be made of a conductive material.
  • the bottom chassis 23 may serve to dissipate heat generated from a light source (not shown) to the outside. Heat generated from a light source (not shown) is transferred to the bottom chassis 23 via a substrate (not shown), and may be radiated from the bottom chassis 23.
  • the bottom chassis 23 may be formed of various metal materials such as aluminum or SUS having good thermal conductivity, or plastic materials such as ABS.
  • the substrate (not shown) may be a metal PCB made of aluminum having good thermal conductivity.
  • Various components of the display device 1 such as a bezel 31 may be fixedly supported on the bottom chassis 23.
  • at least one of the bezel 31 and the bottom chassis 23 may be omitted or may be integrally formed with each other.
  • the housing 30 may include a bezel 31 and a housing cover 32.
  • the bezel 31 may support the display panel 10.
  • the bezel 31 may be detachably coupled to the housing cover 32.
  • an accommodation space may be formed, and a display panel 10 and a backlight unit 20 may be disposed in the accommodation space.
  • the housing cover 32 may cover the rear of the bottom chassis 23 to protect and accommodate the bottom chassis 23.
  • the bezel 31 may be made of a non-conductive material.
  • the bezel 31 may include plastic resin or the like. However, it is not limited thereto.
  • the bezel 31 may include an opening for exposing the display panel 10.
  • FIG 3 is a cross-sectional view of a transparent display panel and a backlight unit in a display device according to an embodiment of the present invention.
  • the display device 1 (see FIG. 1) according to an embodiment of the present invention includes a light guide plate 22 provided to guide light emitted from the light source module 21 to the display panel 10. It may include.
  • the light source module 21 may be disposed on one side of the light guide plate 22. However, the present invention is not limited thereto, and the light source module 21 may be disposed on both sides of the light guide plate 22.
  • the light guide plate 22 may be provided with a diffusion unit 100 configured to diffuse or transmit light according to an angle of light incident on the light guide plate 22.
  • the diffusion unit 100 may be disposed on one side of the light guide plate 22.
  • the display panel 10 may include a transparent display panel 10a.
  • the diffusion unit 100 may be disposed on one side of the light guide plate 22 to be disposed between the transparent display panel 10a and the light guide plate 22.
  • the diffusion unit 100 may be disposed on one side of the light guide plate 22 facing the transparent display panel 10a.
  • the diffusion unit 100 may be disposed behind the transparent display panel 10a.
  • the diffusion unit 100 may be configured to diffuse light incident on the diffusion unit 100 at a first angle (a1) and transmit light incident on the diffusion unit 100 at a second angle (a2). have.
  • the first angle a1 is 45 degrees based on the vertical direction of the light guide plate 22 It can be below. However, it is not limited thereto.
  • light emitted from the light source module 21 enters the light guide plate 22 and is totally reflected through the light guide plate 22, and may propagate from one side of the light guide plate 22 to the other side.
  • the light guide plate 22 may totally reflect light incident on the light guide plate 22 through the upper or lower surface of the light guide plate 22.
  • the diffusion unit 100 may be provided on the upper surface of the light guide plate 22.
  • the diffusion unit 100 When light that has propagated through the light guide plate 22 passes through the diffusion unit 100, it has a range of a first angle (a1) and enters the diffusion unit 100 to diffuse and emit light, and the first angle (a1) Light incident on the diffusion unit 100 having a range of a second angle a2 other than that is not diffused and may be transmitted as it is.
  • the diffusion unit 100 may be provided in plural.
  • the plurality of diffusion units 100 may be spaced apart from each other and disposed on one side of the light guide plate 22.
  • FIG. 4 is a diagram illustrating a diffusion unit including a louver member in a display device according to an embodiment of the present invention.
  • 5 is a diagram illustrating a diffusion unit including a cylindrical member in a display device according to another exemplary embodiment of the present invention.
  • the diffusion unit 100 is provided in the case 110 to diffuse light incident on the case 110 and the case 110. It may include a diffusion member 120 is provided.
  • the diffusion member 120 may be provided in plural.
  • the plurality of diffusion members 120 may be disposed to be spaced apart from each other. However, it is not limited thereto.
  • the case 110 may have a substantially rectangular shape. However, it is not limited thereto.
  • the case 110 may include an incident surface 111 through which light is incident through the light guide plate 22 (refer to FIG. 3), and an exit surface 112 through which light is emitted toward the display panel 10 (see FIG. 3). have.
  • the diffusion member 120 may include a louver member 120a configured to linearly diffuse light incident on the case 110.
  • the louver member 120a may linearly diffuse light incident on the incidence surface 111 to the emission surface 112 at a first angle a1.
  • the louver member 120a may transmit light incident on the incidence surface 111 to the emission surface 112 as it is at the second angle a2.
  • the louver member 120a may have a substantially rectangular shape. However, it is not limited thereto.
  • a diffusion unit 200 includes a case 110 and a diffusion member provided inside the case 110 to diffuse light incident on the case 110. 220) may be included.
  • the diffusion member 220 may include a cylindrical member 220a configured to circularly diffuse light incident on the case 110.
  • the diffusion member 220 according to another exemplary embodiment of the present invention may be the same as the diffusion member 120 according to an exemplary embodiment of the present invention, except that the cylindrical member 220a is included.
  • the cylindrical member 220a may circularly diffuse light incident on the incident surface 111 to the exit surface 112 at a first angle a1.
  • the cylindrical member 220a may transmit light incident on the incident surface 111 to the exit surface 112 as it is at a second angle a2.
  • FIG. 6 is a diagram illustrating a diffusion unit in a display device according to another exemplary embodiment of the present invention.
  • 7 is a diagram illustrating a diffusion unit in a display device according to another exemplary embodiment of the present invention.
  • the diffuser 300 includes the case 110 and the inside of the case 110 so as to diffuse light incident on the case 110. It may include a diffusion member 320 provided in.
  • the diffusion member 320 may include a louver member 320a configured to linearly diffuse light incident on the case 110.
  • the louver member 320a may linearly diffuse light incident on the incidence surface 111 to the emission surface 112 at a first angle a1.
  • the louver member 320a may transmit light incident on the incidence surface 111 to the emission surface 112 as it is at the second angle a2.
  • the louver member 320a may have a substantially rectangular shape. However, it is not limited thereto.
  • the louver member 320a may be inclined.
  • the louver member 320a according to another embodiment of the present invention may be the same as the louver member 120a (refer to FIG. 4) according to an embodiment of the present invention except that it can be inclined.
  • the ranges of the first angle a1 for diffusing light and the second angle a2 for transmitting light may vary. Accordingly, by adjusting the inclination of the louver member 320a, the angle of diffusion or transmission of light through the diffusion member 320 may be adjusted.
  • a diffusion unit 400 includes a case 110 and a diffusion member provided inside the case 110 to diffuse light incident on the case 110. It may include 420.
  • the diffusion member 420 may include a cylindrical member 420a configured to circularly diffuse light incident on the case 110.
  • the cylindrical member 420a may circularly diffuse light incident on the incident surface 111 to the exit surface 112 at a first angle a1.
  • the cylindrical member 420a may transmit light incident on the incident surface 111 as it is to the emission surface 112 at a second angle a2.
  • the cylindrical member 420a may be inclined.
  • the cylindrical member 420a according to another embodiment of the present invention may be the same as the cylindrical member 220a according to another embodiment of the present invention, except that it may be inclined.
  • the ranges of the first angle a1 for diffusing light and the second angle a2 for transmitting light may vary. Accordingly, by adjusting the inclination of the cylindrical member 420a, the angle of diffusion or transmission of light through the diffusion member 420 may be adjusted.
  • FIG. 8 is a diagram illustrating a diffusion unit in a display device according to another exemplary embodiment of the present invention.
  • 9 is a diagram illustrating a diffusion unit in a display device according to another exemplary embodiment of the present invention.
  • the diffuser 500 according to another embodiment of the present invention includes the case 110 and the inside of the case 110 to diffuse light incident on the case 110. It may include a diffusion member 520 provided in.
  • the diffusion member 520 may include a first diffusion member 521 and a second diffusion member 522 disposed above the first diffusion member 521.
  • the first diffusion member 521 may include a cylindrical member 521a.
  • the second diffusion member 522 may include a cylindrical member 522a.
  • the first diffusion member 521 including the cylindrical member 521a may be inclined. Accordingly, the diffusion member 520 according to another embodiment of the present invention may diffuse light incident on the case 110 in various shapes other than a linear or circular shape.
  • a diffuser 600 according to another embodiment of the present invention includes a case 110 and a diffusion member provided inside the case 110 to diffuse light incident on the case 110. It may include 620.
  • the diffusion member 620 may include a first diffusion member 621 and a second diffusion member 622 disposed above the first diffusion member 621.
  • the first diffusion member 621 may include a louver member 621a.
  • the second diffusion member 622 may include a cylindrical member 622a.
  • the first diffusion member 621 including the louver member 621a may be inclined. Accordingly, the diffusion member 620 according to another embodiment of the present invention may diffuse light incident on the case 110 in various shapes other than linear or circular.
  • the diffusion member 620 according to another embodiment of the present invention is a diffusion member 520 according to another embodiment of the present invention, except that the first diffusion member 621 may include a louver member 621a. Can be the same as ).
  • FIG. 10 is a diagram illustrating a diffusion unit in a display device according to another exemplary embodiment of the present invention.
  • 11 is a diagram illustrating a diffusion unit in a display device according to another exemplary embodiment of the present invention.
  • the diffuser 700 according to another embodiment of the present invention includes the case 110 and the inside of the case 110 to diffuse light incident on the case 110. It may include a diffusion member 720 provided in the.
  • the diffusion member 720 may include a cylindrical member 720a configured to circularly diffuse light incident on the case 110.
  • the cylindrical member 720a may be bent.
  • the cylindrical member 720a may include a first cylindrical member 721a and a second cylindrical member 722a that is bent from the first cylindrical member 721a on the upper side of the first cylindrical member 721a.
  • the cylindrical member 720a according to another embodiment of the present invention may be the same as the cylindrical member 420a according to another embodiment of the present invention, except that it can be bent.
  • the first cylindrical member 721a may be inclined.
  • the range of angles for diffusing or transmitting light may vary according to the inclination of the first cylindrical member 721a. Accordingly, by adjusting the degree of bending of the first cylindrical member 721a, the angle of diffusion or transmission of light through the diffusion member 720 may be adjusted.
  • the diffusion member 720 may diffuse light incident on the case 110 in various shapes other than a linear or circular shape.
  • a diffusion unit 800 includes a case 110 and a diffusion member provided inside the case 110 to diffuse light incident on the case 110. It may include 820.
  • the diffusion member 820 may include a first diffusion member 821 and a second diffusion member 822 disposed above the first diffusion member 821.
  • the first diffusion member 821 may include a cylindrical member 821a.
  • the second diffusion member 822 may include a cylindrical member 822a.
  • the first diffusion member 821 including the cylindrical member 821a may be bent.
  • the first diffusion member 821 may include a first cylindrical member 821aa, and a second cylindrical member 821ab that is bent from the first cylindrical member 821aa above the first cylindrical member 821aa.
  • the diffusion member 820 may include a second diffusion member 822 disposed above the first diffusion member 821 It may be the same as the diffusion member 720 according to.
  • the first cylindrical member 821aa may be inclined. Depending on the inclination of the first cylindrical member 821aa, a range of angles for diffusing or transmitting light may vary. Accordingly, by adjusting the degree of bending of the first cylindrical member 821aa, the diffusion or transmission angle of light through the diffusion member 820 can be adjusted.
  • the diffusion member 820 may diffuse light incident on the case 110 in various shapes other than linear or circular.
  • FIG. 12 is a cross-sectional view of a reflective display panel and a backlight unit in a display device according to another embodiment of the present invention.
  • the display device 1 (refer to FIG. 1) according to another embodiment of the present invention is configured to illuminate the reflective display panel 10b and the reflective display panel 10b. It may include a light source module 21.
  • a light source module 21 is disposed on the rear surface of the transparent display panel 10a so that light emitted from the light source module 21 passes through the transparent display panel 10a. Images can be displayed.
  • the reflective display panel 10b may display an image by reflecting light incident from the front surface of the reflective display panel 10b.
  • the reflective display panel 10b can use ambient light as a light source, and consumes less energy than the transparent display panel 10a, thereby increasing power efficiency.
  • the light source module 21 may be disposed on one side of the light guide plate 22 provided to guide the emitted light to the reflective display panel 10b.
  • the light guide plate 22 may be provided with a diffusion unit 900 configured to diffuse or transmit light according to an angle of light incident on the light guide plate 22.
  • the diffusion unit 900 may be disposed on one side of the light guide plate 22.
  • the diffusion unit 900 may be disposed on one side of the light guide plate 22 so as to be disposed between the reflective display panel 10b and the light guide plate 22.
  • the diffusion unit 900 may be disposed on one side of the light guide plate 22 facing the reflective display panel 10b.
  • the diffusion unit 900 may be disposed in front of the reflective display panel 10b.
  • the diffusion unit 900 may be configured to diffuse light incident on the diffusion unit 900 at a first angle a1 and transmit light incident on the diffusion unit 900 at a second angle a2. have.
  • the first angle a1 is 45 degrees based on the vertical direction of the light guide plate 22 It can be below. However, it is not limited thereto.
  • light emitted from the light source module 21 enters the light guide plate 22 and is totally reflected through the light guide plate 22, and may propagate from one side of the light guide plate 22 to the other side.
  • the light guide plate 22 may totally reflect light incident on the light guide plate 22 through the upper or lower surface of the light guide plate 22.
  • the diffusion unit 900 may be provided on the lower surface of the light guide plate 22.
  • the first angle a1 is within the range of the first angle a1, and when incident on the diffusion unit 900, the light may be diffused and emitted, and the first angle a1 Light incident on the diffusion unit 900 having a range of a second angle a2 other than that is not diffused and may be transmitted as it is.
  • the light incident on the diffusion unit 900 at a first angle a1 and diffused may be reflected by the reflective display panel 10b to be emitted to the outside. That is, among the diffused light, light that exceeds the total reflection condition of the light guide plate 22 may enter the reflective display panel 10b and be illuminated.
  • the diffused light that satisfies the total reflection condition of the light guide plate 22 may be totally reflected and propagated by the light guide plate 22 again.
  • Light incident on the diffusion unit 900 at the second angle a2 may not be diffused, but may pass through the diffusion unit 900 as it is, and continue to be totally reflected and propagated by the light guide plate 22.
  • the diffusion unit 900 may include an asymmetric diffusion pattern 900a. However, it is not limited thereto.
  • the luminance uniformity of the light guide plate 22 can be controlled by the size and density of the asymmetric diffusion pattern 900a.
  • a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.
  • the term "and/or" includes a combination of a plurality of related stated items or any of a plurality of related stated items.
  • the display device 1 may include a device that displays an image, such as a television, a monitor, and a display device of a mobile communication terminal.
  • the display device 1 may display an image and output sound. Here, the sound can be output through an external device.
  • the display device 1 may be supported by a stand 2 mounted at the bottom, and may be installed on a wall by a separate bracket.
  • the display device 1 may include a display panel 10, a backlight unit 20, and a housing 30.
  • the backlight unit 20 may include a light source module 21 (refer to FIG. 3 ), a light guide plate 22, and a bottom chassis 23.
  • the display panel 10 is a panel that displays image information such as letters, numbers, and arbitrary icons by adjusting the transmittance of light passing through the liquid crystal layer, and may include a large panel of approximately 60 inches or more.
  • the transmittance of light passing through the liquid crystal layer may be adjusted according to the intensity of the applied voltage.
  • the display panel 10 may include a color filter panel, a thin film transistor array panel (TFT), a liquid crystal layer, and a sealant.
  • the color filter panel and the TFT panel may be made of a glass material.
  • the color filter panel may include red, green, and blue color filters formed in regions corresponding to the pixel electrodes of the TFT panel so that colors are displayed for each pixel.
  • a common electrode made of a transparent conductive material such as Indium Tin Oxide (ITO) or Indium Zinc Oxide (IZO) may be formed on the color filter panel.
  • the backlight unit 20 may include a light source module 21 that emits light from a lower portion of the display panel 10.
  • the light source module 21 may include a light source (not shown) and a substrate (not shown) that drives the light source (not shown) to output light.
  • the light source may include a light emitting diode (LED) that generates light with high efficiency and low power.
  • the light emitting diode may be provided in the form of a package in which a chip is mounted on a substrate (not shown) and filled with a resin.
  • a cold cathode fluorescent lamp (CCFL) or an external electrode fluorescent lamp (EEFL) may be used as a light source (not shown).
  • the substrate (not shown) supplies or cuts off power applied to the light-emitting diode or controls the amount of power supplied to the light-emitting diode, and may include a printed circuit board (PCB) on which a plurality of light-emitting diodes are electrically mounted. .
  • PCB printed circuit board
  • a plurality of light sources may be spaced apart and mounted on a substrate (not shown) at predetermined intervals.
  • the bottom chassis 23 is a panel that connects various components required for image display and sound output, and a substrate (not shown) and an input/output device may be mounted on the bottom chassis 23.
  • the bottom chassis 23 is one of components constituting the backlight unit 20 and may serve to support other components constituting the backlight unit 20.
  • the bottom chassis 23 may be made of a metal having excellent heat dissipation and strength.
  • a driving module for driving the display panel 10 and the backlight unit 20 may be disposed on the bottom chassis 23.
  • the bottom chassis 23 may be made of a conductive material.
  • the bottom chassis 23 may serve to dissipate heat generated from a light source (not shown) to the outside. Heat generated from a light source (not shown) is transferred to the bottom chassis 23 via a substrate (not shown), and may be radiated from the bottom chassis 23.
  • the bottom chassis 23 may be formed of various metal materials such as aluminum or SUS having good thermal conductivity, or plastic materials such as ABS.
  • the substrate (not shown) may be a metal PCB made of aluminum having good thermal conductivity.
  • Various components of the display device 1 such as a bezel 31 may be fixedly supported on the bottom chassis 23.
  • at least one of the bezel 31 and the bottom chassis 23 may be omitted or may be integrally formed with each other.
  • the housing 30 may include a bezel 31 and a housing cover 32.
  • the bezel 31 may support the display panel 10.
  • the bezel 31 may be detachably coupled to the housing cover 32.
  • an accommodation space may be formed, and a display panel 10 and a backlight unit 20 may be disposed in the accommodation space.
  • the housing cover 32 may cover the rear of the bottom chassis 23 to protect and accommodate the bottom chassis 23.
  • the bezel 31 may be made of a non-conductive material.
  • the bezel 31 may include plastic resin or the like. However, it is not limited thereto.
  • the bezel 31 may include an opening for exposing the display panel 10.
  • FIG 3 is a cross-sectional view of a transparent display panel and a backlight unit in a display device according to an embodiment of the present invention.
  • the display device 1 (see FIG. 1) according to an embodiment of the present invention includes a light guide plate 22 provided to guide light emitted from the light source module 21 to the display panel 10. It may include.
  • the light source module 21 may be disposed on one side of the light guide plate 22. However, the present invention is not limited thereto, and the light source module 21 may be disposed on both sides of the light guide plate 22.
  • the light guide plate 22 may be provided with a diffusion unit 100 configured to diffuse or transmit light according to an angle of light incident on the light guide plate 22.
  • the diffusion unit 100 may be disposed on one side of the light guide plate 22.
  • the display panel 10 may include a transparent display panel 10a.
  • the diffusion unit 100 may be disposed on one side of the light guide plate 22 to be disposed between the transparent display panel 10a and the light guide plate 22.
  • the diffusion unit 100 may be disposed on one side of the light guide plate 22 facing the transparent display panel 10a.
  • the diffusion unit 100 may be disposed behind the transparent display panel 10a.
  • the diffusion unit 100 may be configured to diffuse light incident on the diffusion unit 100 at a first angle (a1) and transmit light incident on the diffusion unit 100 at a second angle (a2). have.
  • the first angle a1 is 45 degrees based on the vertical direction of the light guide plate 22 It can be below. However, it is not limited thereto.
  • light emitted from the light source module 21 enters the light guide plate 22 and is totally reflected through the light guide plate 22, and may propagate from one side of the light guide plate 22 to the other side.
  • the light guide plate 22 may totally reflect light incident on the light guide plate 22 through the upper or lower surface of the light guide plate 22.
  • the diffusion unit 100 may be provided on the upper surface of the light guide plate 22.
  • the diffusion unit 100 When light that has propagated through the light guide plate 22 passes through the diffusion unit 100, it has a range of a first angle (a1) and enters the diffusion unit 100 to diffuse and emit light, and the first angle (a1) Light incident on the diffusion unit 100 having a range of a second angle a2 other than that is not diffused and may be transmitted as it is.
  • the diffusion unit 100 may be provided in plural.
  • the plurality of diffusion units 100 may be spaced apart from each other and disposed on one side of the light guide plate 22.
  • FIG. 4 is a diagram illustrating a diffusion unit including a louver member in a display device according to an embodiment of the present invention.
  • 5 is a diagram illustrating a diffusion unit including a cylindrical member in a display device according to another exemplary embodiment of the present invention.
  • the diffusion unit 100 is provided in the case 110 to diffuse light incident on the case 110 and the case 110. It may include a diffusion member 120 is provided.
  • the diffusion member 120 may be provided in plural.
  • the plurality of diffusion members 120 may be disposed to be spaced apart from each other. However, it is not limited thereto.
  • the case 110 may have a substantially rectangular shape. However, it is not limited thereto.
  • the case 110 may include an incident surface 111 through which light is incident through the light guide plate 22 (refer to FIG. 3), and an exit surface 112 through which light is emitted toward the display panel 10 (see FIG. 3). have.
  • the diffusion member 120 may include a louver member 120a configured to linearly diffuse light incident on the case 110.
  • the louver member 120a may linearly diffuse light incident on the incidence surface 111 to the emission surface 112 at a first angle a1.
  • the louver member 120a may transmit light incident on the incidence surface 111 to the emission surface 112 as it is at the second angle a2.
  • the louver member 120a may have a substantially rectangular shape. However, it is not limited thereto.
  • a diffusion unit 200 includes a case 110 and a diffusion member provided inside the case 110 to diffuse light incident on the case 110. 220) may be included.
  • the diffusion member 220 may include a cylindrical member 220a configured to circularly diffuse light incident on the case 110.
  • the diffusion member 220 according to another exemplary embodiment of the present invention may be the same as the diffusion member 120 according to an exemplary embodiment of the present invention, except that the cylindrical member 220a is included.
  • the cylindrical member 220a may circularly diffuse light incident on the incident surface 111 to the exit surface 112 at a first angle a1.
  • the cylindrical member 220a may transmit light incident on the incident surface 111 to the exit surface 112 as it is at a second angle a2.
  • FIG. 6 is a diagram illustrating a diffusion unit in a display device according to another exemplary embodiment of the present invention.
  • 7 is a diagram illustrating a diffusion unit in a display device according to another exemplary embodiment of the present invention.
  • the diffuser 300 includes the case 110 and the inside of the case 110 so as to diffuse light incident on the case 110. It may include a diffusion member 320 provided in.
  • the diffusion member 320 may include a louver member 320a configured to linearly diffuse light incident on the case 110.
  • the louver member 320a may linearly diffuse light incident on the incidence surface 111 to the emission surface 112 at a first angle a1.
  • the louver member 320a may transmit light incident on the incidence surface 111 to the emission surface 112 as it is at the second angle a2.
  • the louver member 320a may have a substantially rectangular shape. However, it is not limited thereto.
  • the louver member 320a may be inclined.
  • the louver member 320a according to another embodiment of the present invention may be the same as the louver member 120a (refer to FIG. 4) according to an embodiment of the present invention except that it can be inclined.
  • the ranges of the first angle a1 for diffusing light and the second angle a2 for transmitting light may vary. Accordingly, by adjusting the inclination of the louver member 320a, the angle of diffusion or transmission of light through the diffusion member 320 may be adjusted.
  • a diffusion unit 400 includes a case 110 and a diffusion member provided inside the case 110 to diffuse light incident on the case 110. It may include 420.
  • the diffusion member 420 may include a cylindrical member 420a configured to circularly diffuse light incident on the case 110.
  • the cylindrical member 420a may circularly diffuse light incident on the incident surface 111 to the exit surface 112 at a first angle a1.
  • the cylindrical member 420a may transmit light incident on the incident surface 111 as it is to the emission surface 112 at a second angle a2.
  • the cylindrical member 420a may be inclined.
  • the cylindrical member 420a according to another embodiment of the present invention may be the same as the cylindrical member 220a according to another embodiment of the present invention, except that it may be inclined.
  • the ranges of the first angle a1 for diffusing light and the second angle a2 for transmitting light may vary. Accordingly, by adjusting the inclination of the cylindrical member 420a, the angle of diffusion or transmission of light through the diffusion member 420 may be adjusted.
  • FIG. 8 is a diagram illustrating a diffusion unit in a display device according to another exemplary embodiment of the present invention.
  • 9 is a diagram illustrating a diffusion unit in a display device according to another exemplary embodiment of the present invention.
  • the diffuser 500 according to another embodiment of the present invention includes the case 110 and the inside of the case 110 to diffuse light incident on the case 110. It may include a diffusion member 520 provided in.
  • the diffusion member 520 may include a first diffusion member 521 and a second diffusion member 522 disposed above the first diffusion member 521.
  • the first diffusion member 521 may include a cylindrical member 521a.
  • the second diffusion member 522 may include a cylindrical member 522a.
  • the first diffusion member 521 including the cylindrical member 521a may be inclined. Accordingly, the diffusion member 520 according to another embodiment of the present invention may diffuse light incident on the case 110 in various shapes other than a linear or circular shape.
  • a diffuser 600 according to another embodiment of the present invention includes a case 110 and a diffusion member provided inside the case 110 to diffuse light incident on the case 110. It may include 620.
  • the diffusion member 620 may include a first diffusion member 621 and a second diffusion member 622 disposed above the first diffusion member 621.
  • the first diffusion member 621 may include a louver member 621a.
  • the second diffusion member 622 may include a cylindrical member 622a.
  • the first diffusion member 621 including the louver member 621a may be inclined. Accordingly, the diffusion member 620 according to another embodiment of the present invention may diffuse light incident on the case 110 in various shapes other than linear or circular.
  • the diffusion member 620 according to another embodiment of the present invention is a diffusion member 520 according to another embodiment of the present invention, except that the first diffusion member 621 may include a louver member 621a. Can be the same as ).
  • FIG. 10 is a diagram illustrating a diffusion unit in a display device according to another exemplary embodiment of the present invention.
  • 11 is a diagram illustrating a diffusion unit in a display device according to another exemplary embodiment of the present invention.
  • the diffuser 700 according to another embodiment of the present invention includes the case 110 and the inside of the case 110 to diffuse light incident on the case 110. It may include a diffusion member 720 provided in the.
  • the diffusion member 720 may include a cylindrical member 720a configured to circularly diffuse light incident on the case 110.
  • the cylindrical member 720a may be bent.
  • the cylindrical member 720a may include a first cylindrical member 721a and a second cylindrical member 722a that is bent from the first cylindrical member 721a on the upper side of the first cylindrical member 721a.
  • the cylindrical member 720a according to another embodiment of the present invention may be the same as the cylindrical member 420a according to another embodiment of the present invention, except that it can be bent.
  • the first cylindrical member 721a may be inclined.
  • the range of angles for diffusing or transmitting light may vary according to the inclination of the first cylindrical member 721a. Accordingly, by adjusting the degree of bending of the first cylindrical member 721a, the angle of diffusion or transmission of light through the diffusion member 720 may be adjusted.
  • the diffusion member 720 may diffuse light incident on the case 110 in various shapes other than a linear or circular shape.
  • a diffusion unit 800 includes a case 110 and a diffusion member provided inside the case 110 to diffuse light incident on the case 110. It may include 820.
  • the diffusion member 820 may include a first diffusion member 821 and a second diffusion member 822 disposed above the first diffusion member 821.
  • the first diffusion member 821 may include a cylindrical member 821a.
  • the second diffusion member 822 may include a cylindrical member 822a.
  • the first diffusion member 821 including the cylindrical member 821a may be bent.
  • the first diffusion member 821 may include a first cylindrical member 821aa, and a second cylindrical member 821ab that is bent from the first cylindrical member 821aa above the first cylindrical member 821aa.
  • the diffusion member 820 may include a second diffusion member 822 disposed above the first diffusion member 821 It may be the same as the diffusion member 720 according to.
  • the first cylindrical member 821aa may be inclined. Depending on the inclination of the first cylindrical member 821aa, a range of angles for diffusing or transmitting light may vary. Accordingly, by adjusting the degree of bending of the first cylindrical member 821aa, the diffusion or transmission angle of light through the diffusion member 820 can be adjusted.
  • the diffusion member 820 may diffuse light incident on the case 110 in various shapes other than linear or circular.
  • FIG. 12 is a cross-sectional view of a reflective display panel and a backlight unit in a display device according to another embodiment of the present invention.
  • the display device 1 (refer to FIG. 1) according to another embodiment of the present invention is configured to illuminate the reflective display panel 10b and the reflective display panel 10b. It may include a light source module 21.
  • a light source module 21 is disposed on the rear surface of the transparent display panel 10a so that light emitted from the light source module 21 passes through the transparent display panel 10a. Images can be displayed.
  • the reflective display panel 10b may display an image by reflecting light incident from the front surface of the reflective display panel 10b.
  • the reflective display panel 10b can use ambient light as a light source, and consumes less energy than the transparent display panel 10a, thereby increasing power efficiency.
  • the light source module 21 may be disposed on one side of the light guide plate 22 provided to guide the emitted light to the reflective display panel 10b.
  • the light guide plate 22 may be provided with a diffusion unit 900 configured to diffuse or transmit light according to an angle of light incident on the light guide plate 22.
  • the diffusion unit 900 may be disposed on one side of the light guide plate 22.
  • the diffusion unit 900 may be disposed on one side of the light guide plate 22 so as to be disposed between the reflective display panel 10b and the light guide plate 22.
  • the diffusion unit 900 may be disposed on one side of the light guide plate 22 facing the reflective display panel 10b.
  • the diffusion unit 900 may be disposed in front of the reflective display panel 10b.
  • the diffusion unit 900 may be configured to diffuse light incident on the diffusion unit 900 at a first angle a1 and transmit light incident on the diffusion unit 900 at a second angle a2. have.
  • the first angle a1 is 45 degrees based on the vertical direction of the light guide plate 22 It can be below. However, it is not limited thereto.
  • light emitted from the light source module 21 enters the light guide plate 22 and is totally reflected through the light guide plate 22, and may propagate from one side of the light guide plate 22 to the other side.
  • the light guide plate 22 may totally reflect light incident on the light guide plate 22 through the upper or lower surface of the light guide plate 22.
  • the diffusion unit 900 may be provided on the lower surface of the light guide plate 22.
  • the first angle a1 is within the range of the first angle a1, and when incident on the diffusion unit 900, the light may be diffused and emitted, and the first angle a1 Light incident on the diffusion unit 900 having a range of a second angle a2 other than that is not diffused and may be transmitted as it is.
  • the light incident on the diffusion unit 900 at a first angle a1 and diffused may be reflected by the reflective display panel 10b to be emitted to the outside. That is, among the diffused light, light that exceeds the total reflection condition of the light guide plate 22 may enter the reflective display panel 10b and be illuminated.
  • the diffused light that satisfies the total reflection condition of the light guide plate 22 may be totally reflected and propagated by the light guide plate 22 again.
  • Light incident on the diffusion unit 900 at the second angle a2 may not be diffused, but may pass through the diffusion unit 900 as it is, and continue to be totally reflected and propagated by the light guide plate 22.
  • the diffusion unit 900 may include an asymmetric diffusion pattern 900a. However, it is not limited thereto.
  • the luminance uniformity of the light guide plate 22 can be controlled by the size and density of the asymmetric diffusion pattern 900a.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Planar Illumination Modules (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Liquid Crystal (AREA)

Abstract

L'invention concerne un dispositif d'affichage comprenant une plaque de guidage de lumière qui est prévue pour guider une lumière incidente en provenance d'un module de source de lumière. Le dispositif d'affichage comprend : un panneau d'affichage ; une plaque de guidage de lumière prévue pour guider la lumière émise depuis un module de source de lumière vers le panneau d'affichage ; et une partie de diffusion disposée dans la plaque de guidage de lumière pour diffuser ou transmettre une lumière incidente en fonction de l'angle de la lumière incidente.
PCT/KR2020/001165 2019-04-25 2020-01-23 Dispositif d'affichage WO2020218719A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2019-0048177 2019-04-25
KR1020190048177A KR20200124839A (ko) 2019-04-25 2019-04-25 디스플레이 장치

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WO2020218719A1 true WO2020218719A1 (fr) 2020-10-29

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11232919A (ja) * 1998-02-17 1999-08-27 Fuji Xerox Co Ltd フロントライト照明装置および反射型表示装置
JP2005107011A (ja) * 2003-09-29 2005-04-21 Daicel Chem Ind Ltd 反射スクリーン、それを用いた表示方法および表示装置
JP2014067524A (ja) * 2012-09-25 2014-04-17 Dainippon Printing Co Ltd 面光源装置及び透過型表示装置
US20140111862A1 (en) * 2011-05-13 2014-04-24 Sharp Kabushiki Kaisha Light diffusion member, method for producing same, and display device
JP2015069049A (ja) * 2013-09-30 2015-04-13 リンテック株式会社 半透過型表示体

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11232919A (ja) * 1998-02-17 1999-08-27 Fuji Xerox Co Ltd フロントライト照明装置および反射型表示装置
JP2005107011A (ja) * 2003-09-29 2005-04-21 Daicel Chem Ind Ltd 反射スクリーン、それを用いた表示方法および表示装置
US20140111862A1 (en) * 2011-05-13 2014-04-24 Sharp Kabushiki Kaisha Light diffusion member, method for producing same, and display device
JP2014067524A (ja) * 2012-09-25 2014-04-17 Dainippon Printing Co Ltd 面光源装置及び透過型表示装置
JP2015069049A (ja) * 2013-09-30 2015-04-13 リンテック株式会社 半透過型表示体

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