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WO2015124074A1 - 电子纸显示屏导光板及电子纸显示屏 - Google Patents

电子纸显示屏导光板及电子纸显示屏 Download PDF

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Publication number
WO2015124074A1
WO2015124074A1 PCT/CN2015/072720 CN2015072720W WO2015124074A1 WO 2015124074 A1 WO2015124074 A1 WO 2015124074A1 CN 2015072720 W CN2015072720 W CN 2015072720W WO 2015124074 A1 WO2015124074 A1 WO 2015124074A1
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WO
WIPO (PCT)
Prior art keywords
guide plate
light guide
light
electronic paper
display screen
Prior art date
Application number
PCT/CN2015/072720
Other languages
English (en)
French (fr)
Inventor
林永强
孙景泉
Original Assignee
广州奥翼电子科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=51264344&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2015124074(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by 广州奥翼电子科技有限公司 filed Critical 广州奥翼电子科技有限公司
Priority to EP15752879.5A priority Critical patent/EP3121628B1/en
Priority to US15/120,477 priority patent/US10935711B2/en
Publication of WO2015124074A1 publication Critical patent/WO2015124074A1/zh

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    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • G02B6/0021—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces for housing at least a part of the light source, e.g. by forming holes or recesses
    • 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 
    • G02F1/165—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 translational movement of particles in a fluid under the influence of an applied field
    • G02F1/166—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 translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
    • G02F1/167—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 translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
    • 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 
    • G02F1/165—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 translational movement of particles in a fluid under the influence of an applied field
    • G02F1/1675—Constructional details
    • G02F1/1677—Structural association of cells with optical devices, e.g. reflectors or illuminating devices
    • 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
    • G02B6/0066—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 characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • 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
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Definitions

  • the invention relates to a front light illumination technology of an electronic paper display screen, in particular to an electronic paper display light guide plate and an electronic paper display screen.
  • front light illumination generally has a light guide plate 30' and an LED lamp 60' disposed on the display surface of the electronic paper display module 10'.
  • the front light source generally uses a side light emitting LED lamp to achieve its thin and light effect.
  • the LED lamp 60' is located outside the light incident surface 33' of the light guide plate 30', and is separated from the light guide plate 30' by a layer of air.
  • the light incident side of the light guide plate 30' is a flat surface, that is, a light guide plate entrance surface 33'. Light is emitted from the LED lamp into the air and refracted into the light guide plate 30' through the light incident surface 33' of the light guide plate 30'.
  • the existing front light source generally reduces the LED light as much as possible. The number, therefore the distance between adjacent LED lights is large. This forms a bright area A' directly in front of the LED lamp and a dark area B' in front of the two adjacent LED lamps.
  • the distance between the LED light and the display area 90' cannot be too long.
  • Such a light mixing distance is not enough, resulting in a too large range of the dark area B', thereby covering a partial area of the display area 90' close to the light entrance side, resulting in a dark spot on the light entrance side of the display area, so that the entire front light is in the display area.
  • the brightness of the entrance surface is uneven, which affects the reading effect.
  • one of the objects of the present invention is to provide an electronic paper display screen light guide plate, which has better light guiding effect and can make the illumination brightness of the electronic paper display screen at the position where the display surface is lighted.
  • the second object of the present invention is to provide an electronic paper display screen with better light guiding effect and capable of The illumination brightness of the electronic paper display screen at the position where the display surface is lighted is uniform.
  • the present invention provides an electronic paper display screen light guide plate for being disposed above a display surface of an electrophoretic display module, comprising a light guide plate body, and the light guide plate body is disposed on the light incident surface There are teeth.
  • the electrophoretic display module comprises a microcapsule electrophoretic display module or a microcup electrophoretic display module.
  • the rib is a regular or irregular shape formed by providing continuous or discontinuous grooves or protrusions on the light incident surface of the main body of the light guide plate.
  • the rib is a ridge formed by a plurality of arcuate projections or a plurality of arcuate grooves or a plurality of horns or a plurality of horn grooves.
  • the arcuate protrusion or the arcuate groove or the horn or the angular groove has a width of 0.1 to 0.5 mm, and enters the light guide plate in the width range.
  • the light beam mixing effect is better, and the illumination brightness is relatively uniform.
  • the arcuate protrusion or the curved groove or the horn or the angular groove has a width of 0.2 to 0.3 mm, and enters the light guide plate in the width range.
  • the beam blending effect is better and the illumination brightness is more uniform.
  • the height of the arcuate projection or the curved groove or the horn or the angular groove is 0.05 to 0.25 mm. In this height range, the light beam entering the light guide plate has a better light mixing effect, and the illumination brightness is relatively uniform.
  • the height of the arcuate projection or the arcuate groove or the horn or the angular groove is 0.1 to 0.15 mm. In this height range, the light beam entering the light guide plate has a better light mixing effect and the illumination brightness is more uniform.
  • the distance between two adjacent arcuate projections or arcuate grooves or horns or angular grooves is 0 to 0.5 mm. Under this range, the light beam entering the light guide plate has a better light mixing effect and the illumination brightness is relatively uniform.
  • the light guide plate body extends into the LED lamp region, and the light guide plate body is provided with a recess for accommodating the LED lamp.
  • the present invention also provides an electronic paper display screen comprising electrophoretic display The display module, the light guide plate, and the front light illumination device disposed on the electrophoretic display module, wherein the light guide plate is any one of the light guide plates.
  • the electrophoretic display module comprises a substrate layer, a microcapsule electrophoretic display layer and a transparent electrode layer in sequence.
  • the light guide plate and the electronic paper display screen of the present invention have a tooth pattern on the light incident surface of the light guide plate, so that the light incident surface has a light incident angle in a plurality of directions, thereby greatly diffusing into the light guide plate.
  • the refracted beam avoids the dark area entering the light entering position of the electronic paper display screen, so that the illumination brightness of the electronic paper display area is more uniform and the lighting effect is better.
  • FIG. 1 is a schematic diagram showing the effect of front light illumination of an electronic paper display screen in the prior art.
  • FIG. 2 is a schematic view showing the structure of an electronic paper display screen having front light illumination in a preferred embodiment of the present invention.
  • FIG. 3 is a schematic structural view of the front light illumination device shown in FIG. 2.
  • FIG. 3 is a schematic structural view of the front light illumination device shown in FIG. 2.
  • Figure 4 is a schematic view of the structure of the light bar in a preferred embodiment.
  • Figure 5 is a schematic view showing the structure of the side-emitting LED lamp in a preferred embodiment.
  • Figure 6 is a schematic view showing the structure of an electronic paper display screen having front light illumination in another preferred embodiment of the present invention.
  • Figure 7 is a cross-sectional view, taken along line A-A, of the electronic paper display screen shown in Figure 6.
  • FIG. 8 is a schematic structural view of the front light illumination device shown in FIG. 6.
  • FIG. 9 is a schematic view showing the positional relationship between the LED lamp and the light guide plate shown in FIG. 6.
  • FIG. 10 is a schematic structural view of the electrophoretic display module in a preferred embodiment.
  • Figure 11 is a schematic illustration of the effect of front light illumination in a preferred embodiment of an electronic paper display having front light illumination in accordance with the present invention.
  • Figure 12 is a schematic view showing the structure of the light guide plate in a preferred embodiment.
  • FIG. 13 is a schematic view showing the light incident effect of the light incident surface of the light guide plate shown in FIG.
  • Fig. 14 is a view showing the structure of the arcuate projection of the light incident surface of the light guide plate shown in Fig. 12.
  • Figure 15 is a schematic illustration of the effect of front light illumination in another preferred embodiment of an electronic paper display screen with frontlight illumination of the present invention.
  • Figure 16 is a schematic view showing the structure of the light guide plate in a preferred embodiment.
  • Fig. 17 is a view showing the light incident on the light incident surface of the light guide plate shown in Fig. 16.
  • Fig. 18 is a view showing the structure of the arc-shaped groove of the light incident surface of the light guide plate shown in Fig. 16.
  • Figure 19 is a schematic view showing the structure of the light guide plate in a preferred embodiment.
  • FIG. 20 is a schematic view showing the shape and structure of the light-incident-angled groove of the light guide plate shown in FIG. 19.
  • FIG. 20 is a schematic view showing the shape and structure of the light-incident-angled groove of the light guide plate shown in FIG. 19.
  • Figure 21 is a schematic view showing the effect of the front light illumination of the electronic paper display screen with front light illumination in a further preferred embodiment of the present invention.
  • Figure 22 is a schematic view showing the structure of the light guide plate in a preferred embodiment.
  • 332 curved groove
  • 333 angular groove
  • A1, A2, A3 bright area
  • B1, B2, B3 dark area
  • FIG. 2 is an electric power with front light illumination.
  • FIG. 2 is an electric power with front light illumination.
  • FIG. 2 is an electric power with front light illumination.
  • the electronic paper display screen includes an electronic paper display module 10, an optical adhesive layer 20, a light guide plate 30, an adhesive 40, a driving circuit board 50, and an LED lamp 60.
  • the light guide plate 30 is disposed on a display surface of the electronic paper display module 10.
  • the optical adhesive layer 20 is disposed between the electronic paper display module 10 and the light guide plate 30 for adhering the light guide plate 30 to the display surface of the electronic paper display module 10.
  • One end of the driving circuit board 50 is adhered to the light guiding plate 30 by an adhesive 40, and the other end is used for mounting the LED lamp 60.
  • the electrophoretic display module 10 can be a reflective display module such as a microcapsule electrophoretic display module or a microcup electrophoretic display module.
  • the microcapsule electrophoretic display module includes a substrate layer 11, a microcapsule electrophoretic display layer 12, and a transparent electrode layer 13 in this order.
  • the microcapsule electrophoretic display layer is a solid state electrophoretic display layer.
  • the substrate layer 11 has a plurality of pixel electrodes and may be a TFT glass substrate layer.
  • the microcapsule electrophoretic display layer 12 is coated with a transparent electrophoresis liquid, a positively or negatively charged one color particle, and a neutral another color particle.
  • the microcapsule electrophoretic display layer 12 is coated with a transparent electrophoresis liquid, a positively charged particle of one color, and a negatively charged particle of another color, driven by a driving voltage. The charged particles move in the microcapsules for display.
  • the optical adhesive layer 20 is used for bonding the light guide plate 30 and the electrophoretic display module 10.
  • the optical adhesive used in the optical adhesive layer 20 is required to have colorless transparency, light transmittance of 90% or more, good bonding strength, curing at room temperature or medium temperature, and low curing shrinkage.
  • Silicone rubber, acrylic resin and unsaturated polyester, polyurethane, epoxy resin and other adhesives can bond optical components.
  • Some treatment agents are usually added during formulation to improve their optical properties or to reduce cure shrinkage.
  • the light guide plate 30 is an optical grade acrylic PMMA/PC sheet. Light guide dots can be printed on the surface of optical grade acrylic PMMA/PC sheets using UV screen printing techniques using high refractive index materials. It is also possible to produce a light guide plate 30 with concave or convex light spots by one injection molding by an injection molding machine. The light emitted from the lamp enters the inside of the light guide plate 30, and the total reflection between the two sides of the light guide plate is transmitted to the distal end. When the light is incident on each light guiding point, the total reflection condition is destroyed and the surface of the light guide plate is emitted.
  • the light guide plate can be uniformly illuminated by various light-tight and different light guiding point designs.
  • the adhesive layer 40 is used to bond the light guide plate 30 and the driving circuit board 50.
  • the light guide plate 30, the driving circuit board 50, and the LED lamp 60 constitute a front light illumination device of the electronic paper display screen.
  • one or more LED lamps 60 are soldered to the drive circuit board 50 to form a light bar.
  • the drive circuit board 50 is a flexible printed circuit board for driving an LED lamp that is adhered to the light guide plate 30 by an adhesive layer 40.
  • the LED lamp 60 is a side-emitting LED lamp, and the LED lamp includes a wick 62 connected to the driving circuit board 50 and a lamp housing 61 wrapped around the wick 62 .
  • a light exit is formed on a side of the lamp housing 61 adjacent to the light incident surface 33 of the light guide plate 30.
  • the wick 62 emits light after being energized, and the light passes through the light exit port on the side of the lamp housing 61 to the light incident surface 33 of the light guide plate 30.
  • the light guide plate in the above-mentioned electronic paper display screen is provided with a tooth pattern on the light incident surface 33 of the light guide plate main body, and the tooth pattern is composed of a plurality of arcs.
  • the teeth formed by the protrusions 331 are formed.
  • the plurality of arcuate protrusions 331 have the same shape and size, and are regularly arranged on the light incident surface 33. This facilitates the incident light beam to uniformly enter the light guide plate through the light incident surface 33.
  • the height h of the curved protrusions 331 may be set to 0.05 to 0.25 mm, for example, 0.05 mm, 0.1 mm, 0.12 mm, 0.15 mm, 0.2 mm, 0.25 mm, etc., and is generally preferably 0.1 to 0.15 mm.
  • the width L of the curved protrusions 331 may be set to 0.1 to 0.5 mm, for example, 0.1 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.4 mm, etc., and is generally preferably 0.2 to 0.3 mm.
  • the distance between two adjacent arcuate protrusions 331 may be set to 0 to 0.5 mm, for example, 0 mm, 0.05 mm, 0.1 mm, 0.12 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.4 mm, 0.5 mm. Or, it is generally preferably 0 to 0.1 mm.
  • the display area 90 of the electronic paper display screen is bounded by a broken line in FIG. 11, and the dotted line represents the light entrance 91 of the display area 90.
  • the curved protrusion 331 causes the light beam to form a plurality of incident angles on the light incident surface, thereby generating different angles of refraction, so that the light beam is concentrated in the light guide plate and then diverged, thereby greatly diffusing the light beam entering the light guide plate 30, effectively
  • the range of the dark area B1 is reduced to make the dark area B1 away from the display area 90; the range of the bright area A1 is enlarged, so that the display area 90 is completely in the bright area A1.
  • the light entrance 91 of the display area 90 near the edge of the light incident surface does not have a dark area, so that the front light illumination effect is better, and the display area display effect is better.
  • the light guide plate in the above-mentioned electronic paper display screen is provided with a tooth on the light incident surface 33 of the light guide plate body.
  • the plurality of arcuate grooves 332 have the same shape and size, and are regularly arranged on the light incident surface 33. This facilitates the incident light beam to uniformly enter the light guide plate through the light incident surface 33.
  • the height h of the curved groove 332 may be set to 0.05 to 0.25 mm, for example, 0.05 mm, 0.1 mm, 0.12 mm, 0.15 mm, 0.2 mm, 0.25 mm, etc., and is generally preferably 0.1 to 0.15 mm.
  • the width L of the curved protrusions 332 may be set to 0.1 to 0.5 mm, for example, 0.1 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.4 mm, etc., and is generally preferably 0.2 to 0.3 mm.
  • the distance between two adjacent arcuate grooves 332 may be set to 0 to 0.5 mm, such as 0 mm, 0.05 mm, 0.1 mm, 0.12 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.4 mm, 0.5.
  • Mm or the like is generally preferably 0 to 0.1 mm.
  • the display area 90 of the electronic paper display screen is bounded by a broken line in FIG. 15, and the dotted line represents the light entrance 91 of the display area 90.
  • the curved groove 332 causes the light beam to form a plurality of incident angles on the light incident surface, thereby generating different angles of refraction, thereby greatly diffusing the light beam entering the light guide plate 30, effectively reducing the range of the dark region B2, and making the dark
  • the area B2 is away from the display area 90; the range of the bright area A2 is enlarged, so that the display area 90 is completely in the bright area A2.
  • the light entrance 91 of the display area 90 near the edge of the light incident surface does not have a dark area, so that the front light illumination effect is better, and the display area display effect is better.
  • the light guide plate 30 is provided with a tooth on the light incident surface 33 of the light guide plate main body.
  • the tooth pattern is composed of a plurality of teeth.
  • the rib grooves 333 form a tooth pattern.
  • the plurality of angular grooves 333 have the same shape and size, and are regularly arranged on the light incident surface 33. This facilitates the incident light beam to uniformly enter the light guide plate through the light incident surface 33.
  • the height h of the angular groove 333 may be set to 0.05 to 0.25 mm, for example, 0.05 mm, 0.1 mm, 0.12 mm, 0.15 mm, 0.2 mm, 0.25 mm, etc., and is generally preferably 0.1 to 0.15 mm.
  • the width L of the angular groove 333 may be set to 0.1 to 0.5 mm, for example, 0.1 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.4 mm, etc., and is generally preferably 0.2 to 0.3 mm.
  • the distance M between two adjacent corner grooves 333 may be set to 0 to 0.5 mm, for example, 0 mm, 0.05 mm, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, etc., and generally preferably 0.1 to 0.3. Mm.
  • the angular groove 333 causes the light beam to form a plurality of incident angles on the light incident surface, thereby generating different angles of refraction, thereby greatly diffusing the light beam entering the light guide plate 30, so that the front light illumination effect is better, and the display area is displayed. better result.
  • the electronic paper display screen includes the electronic paper display
  • the screen includes an electronic paper display module 10, an optical adhesive layer 20, a light guide plate 30, an adhesive 40, a driving circuit board 50, and an LED lamp 60.
  • the light guide plate 30 is disposed on a display surface of the electronic paper display module 10.
  • the optical adhesive layer 20 is disposed between the electronic paper display module 10 and the light guide plate 30 for adhering the light guide plate 30 to the display surface of the electronic paper display module 10.
  • One end of the driving circuit board 50 is adhered to the light guiding plate 30 by an adhesive 40, and the other end is used for mounting the LED lamp 60.
  • the light guide plate 30, the driving circuit board 50, and the LED lamp 60 constitute a front light illumination device of the electronic paper display screen; the drive circuit board 50 is soldered with one or more LED lamps 60 to form a lamp. article.
  • the light guide plate 30 is attached to the display surface of the electrophoretic display module 10, and includes a light guide plate main body.
  • the light guide plate main body extends into the LED lamp region 100 by extension, and the LED lamp region 100 refers to an LED lamp.
  • the location and its adjacent area, such as the dashed area shown in Figure 9, should also include an area between the LED lights when there are two or more LED lights.
  • the light guide plate body is provided with a recess 31 for accommodating the LED lamp 60.
  • the LED lamp is received in the recess 31 of the light guide plate 30, so that the light guide plate body extends into the LED lamp region 100 through this form. in.
  • the LED lamp is accommodated in the recess 31, so that the LED lamp 60 can be prevented from being squeezed and bumped, thereby locating the position of the LED lamp 60 to avoid positional displacement; and because the light guide plate 30 is extended In the LED lamp area 100, the driving circuit board 50 can be supported by the groove groove side 32 of the light guide plate 30 to avoid the position of the LED lamp 60 being shifted due to the lifting of the driving circuit board 50, etc. Further, the light guiding plate 30 extends into the LED lamp area 100, effectively reducing the light leakage of the LED lamp 60.
  • the groove 31 penetrates the upper and lower surfaces of the main body of the light guide plate, so that the processing of the groove 31 is facilitated, and the LED lamp is also conveniently accommodated in the groove 31.
  • the LED lamp 60 has an elongated shape, which facilitates widening the light emitting surface of the LED lamp, that is, can provide a wider range of illumination to the light guide plate.
  • the shape and size of the recess 31 are adapted to the shape and size of the LED lamp 60, that is, the recess 31 can also be formed into a strip-shaped recess whose depth is adapted to the width of the strip LED lamp 60.
  • the top of the LED lamp 60 is flush with the notch of the groove 31.
  • the light incident surface 33 of the light guide plate is disposed at the bottom of the recess 31.
  • the light incident surface 33 is provided with a tooth pattern, and the tooth pattern is composed of a plurality of curved protrusions 331. The formation of the dents.
  • the plurality of arcuate protrusions 331 have the same shape and size, and are regularly arranged on the light incident surface 33. This facilitates the incident light beam to uniformly enter the light guide plate through the light incident surface 33.
  • the height h of the curved protrusions 331 may be set to 0.05 to 0.25 mm, for example, 0.05 mm, 0.1 mm, 0.12 mm, 0.15 mm, 0.2 mm, 0.25, etc., and is generally preferably 0.1 to 0.15 mm.
  • the width L of the curved protrusions 331 may be set to 0.1 to 0.5 mm, for example, 0.1 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.4 mm, etc., and is generally preferably 0.2 to 0.3 mm.
  • the distance between two adjacent arcuate protrusions 331 may be set to 0 to 0.5 mm, for example, 0 mm, 0.05 mm, 0.1 mm, 0.12 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.4 mm, 0.5 mm. Or, it is generally preferably 0 to 0.1 mm.
  • the display area 90 of the electronic paper display screen is bounded by a broken line in FIG. 21, and the dotted line represents the light entrance 91 of the display area 90.
  • the curved protrusion 331 causes the light beam to form a plurality of incident angles on the light incident surface, thereby generating different angles of refraction, so that the light beam is concentrated in the light guide plate and then diverged, thereby greatly diffusing the light beam entering the light guide plate 30, effectively
  • the range of the dark area B3 is reduced to make the dark area B3 away from the display area 90; the range of the bright area A3 is enlarged, so that the display area 90 is completely in the bright area A3.
  • the light entrance 91 of the display area 90 near the edge of the light incident surface does not have a dark area, so that the front light illumination effect is better, and the display area display effect is better.
  • the ridge may also be a ridge formed by a plurality of arcuate grooves; or may be a ridge formed by a plurality of horn grooves or a plurality of horns.
  • the adjacent arcuate grooves, arcuate protrusions, angular grooves or horns may be connected to each other in front and rear; or may be spaced apart.
  • the number of the LED lamps may be set to one or more than two, for example, three or four.

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Abstract

一种电子纸显示屏导光板（30）及电子纸显示屏。其中，该导光板（30）用于设置于电泳显示模组（10）显示面的上方，其包括导光板主体，所述导光板主体的入光面（33）上设置有齿纹。所述电泳显示模组（10）其包括微胶囊电泳显示模组或微杯电泳显示模组。所述齿纹为多个弧形突起（331）或多个弧形凹槽（332）或多个角状突起或多个角状凹槽（333）形成的齿纹。该导光板（30）、电子纸显示屏，通过在导光板（30）的入光面（33）上开设齿纹，使入光面（33）具有多个方向的入光角度，从而极大地扩散进入导光板（30）中的折射光束，避免在电子纸显示屏显示区域（90）的入光位置出现有入光暗区（B1、B2、B3），从而使电子纸显示屏显示区域（90）的照明亮度更加均匀，照明效果更加好。

Description

电子纸显示屏导光板及电子纸显示屏 技术领域
本发明涉及一种电子纸显示屏的前光照明技术，尤其是一种电子纸显示屏导光板及电子纸显示屏。
背景技术
电子纸阅读器为反射型阅读器，一般采用前光照明。参考图1，前光照明一般将导光板30’与LED灯60’都设置于电子纸显示模组10’的显示面之上。前光光源一般使用侧出光LED灯，以实现其轻薄的效果。LED灯60’位于导光板30’的入光面33’外侧，与导光板30’隔了一层空气。导光板30’的入光侧是平面,即导光板入光面33’。光线从LED灯射出进入空气，再通过导光板30’的入光面33’折射进入导光板30’。
一方面由于导光板是位于电子纸显示模组的上方，亮度和背光显示模组相比不需要太高；另一方面为了节省成本、降低功耗，现有前光光源一般尽可能减少LED灯的数量，因此相邻LED灯之间距离较大。这样就会在LED灯的正前方形成亮区A’，在两相邻LED灯之间的前方形成暗区B’。
由于电子纸显示模组上的空间有限，LED灯与显示区域90’之间的距离不能太长。这样混光距离就不够，导致暗区B’的范围过大，从而覆盖显示区域90’靠近入光侧的部分区域，导致显示区域在入光侧有暗斑，使整个前光在显示区域的入光面亮度不均匀，影响阅读效果。
发明内容
针对现有技术的不足，本发明的目的之一是提供一种电子纸显示屏导光板，其导光效果更好，且能够使电子纸显示屏在显示面入光处位置的照明亮度均匀。
本发明的目的之二是提供一种电子纸显示屏，其导光效果更好，且能够 使电子纸显示屏在显示面入光处位置的照明亮度均匀。
为达到上述目的之一，本发明提供一种电子纸显示屏导光板，其用于设置于电泳显示模组显示面的上方，其包括导光板主体，所述导光板主体的入光面上设置有齿纹。
所述电泳显示模组其包括微胶囊电泳显示模组或微杯电泳显示模组。
所述齿纹是指在所述导光板主体的入光面上设置连续或不连续的凹槽或\和突起而形成的规则或不规则的形状。
作为本发明一种导光板在一方面的改进，所述齿纹为由多个弧形突起或多个弧形凹槽或多个角状突起或多个角状凹槽形成的齿纹。
作为本发明一种导光板在一方面的改进，所述弧形突起或弧形凹槽或角状突起或角状凹槽的宽度为0.1～0.5mm，在这个宽度范围下，进入导光板中的光束混光效果较好，照明亮度比较均匀。
作为本发明一种导光板在一方面的改进，所述弧形突起或弧形凹槽或角状突起或角状凹槽的宽度为0.2～0.3mm，在这个宽度范围下，进入导光板中的光束混光效果更加好，照明亮度更加均匀。
作为本发明一种导光板在一方面的改进，所述弧形突起或弧形凹槽或角状突起或角状凹槽的高度为0.05～0.25mm。在这个高度范围下，进入导光板中的光束混光效果较好，照明亮度比较均匀。
作为本发明一种导光板在一方面的改进，所述弧形突起或弧形凹槽或角状突起或角状凹槽的高度为0.1～0.15mm。在这个高度范围下，进入导光板中的光束混光效果更加好，照明亮度更加均匀。
作为本发明一种导光板在一方面的改进，两相邻所述弧形突起或弧形凹槽或角状突起或角状凹槽之间的距离为0～0.5mm。在这个范围下，进入导光板中的光束混光效果较好，照明亮度比较均匀。
作为本发明一种导光板在一方面的改进，所述导光板主体伸入LED灯区域，该导光板主体上设置有用于容置LED灯的凹槽。
为达到上述目的之二，本发明还提供一种电子纸显示屏，其包括电泳显 示模组、导光板、设置于该电泳显示模组上的前光照明装置，所述导光板为上述任意一种所述的导光板。
作为本发明一种电子纸显示屏在一方面的改进，所述电泳显示模组依次包括基板层、微胶囊电泳显示层以及透明电极层。
与现有技术相比较，本发明导光板、电子纸显示屏通过在导光板的入光面上开设齿纹，使入光面具有多个方向的入光角度，从而极大地扩散进入导光板中的折射光束，避免在电子纸显示屏显示区域的入光位置出现有入光暗区，从而使电子纸显示屏显示区域的照明亮度更加均匀，照明效果更加好。
附图说明
图1为现有技术中电子纸显示屏的前光照明的效果示意图。
图2为本发明具有前光照明的电子纸显示屏在一个优选实施例中的结构示意图。
图3为图2中所示前光照明装置的结构示意图。
图4为所述灯条在一个优选实施例中的结构示意图。
图5为所述侧出光LED灯在一个优选实施例中的结构示意图。
图6为本发明具有前光照明的电子纸显示屏在另一个优选实施例中的结构示意图。
图7为图6中所示电子纸显示屏的A-A向截面示意图。
图8为图6中所示前光照明装置的结构示意图。
图9为图6中所示LED灯与导光板的位置关系示意图。
图10为所述电泳显示模组在一个优选实施例中的结构示意图。
图11为本发明具有前光照明的电子纸显示屏在一个优选实施例中的前光照明的效果示意图。
图12为所述导光板在一个优选实施例中的结构示意图。
图13为图12中所示导光板的入光面入光效果示意图。
图14为图12中所示导光板的入光面弧形突起的形状结构示意图。
图15为本发明具有前光照明的电子纸显示屏在另一个优选实施例中的前光照明的效果示意图。
图16为所述导光板在一个优选实施例中的结构示意图。
图17为图16中所示导光板的入光面入光示意图。
图18为图16中所示导光板的入光面弧形凹槽的形状结构示意图。
图19为所述导光板在一个优选实施例中的结构示意图。
图20为图19中所示导光板的入光面角状凹槽的形状结构示意图。
图21为本发明具有前光照明的电子纸显示屏在又一个优选实施例中的前光照明的效果示意图。
图22为所述导光板在一个优选实施例中的结构示意图。
10：电泳显示模组；         11：基板层
12：微胶囊电泳显示层       13：透明电极层
20：光学胶层；             30：导光板；
31：凹槽；                 32：凹槽槽边；
33：入光面；               331：弧形突起；
332：弧形凹槽；            333：角状凹槽；
40：胶黏剂层；             50：驱动电路板；
60：LED灯；                61：灯壳；
62：灯芯；                 90：显示区域；
91：入光处；               100：LED灯区域；
A1、A2、A3：亮区；         B1、B2、B3:暗区。
具体实施方式
下面结合附图和具体实施例对本发明所述技术方案作进一步的详细描述，以使本领域的技术人员可以更好的理解本发明并能予以实施，但所举实施例不作为对本发明的限定。
提供一种电子纸显示屏，参见图2-图5，图2为一种具有前光照明的电 子纸显示屏在一个优选实施例中的结构示意图。该电子纸显示屏包括电子纸显示模组10、光学胶层20、导光板30、粘黏剂40、驱动电路板50、LED灯60。所述导光板30设置于所述电子纸显示模组10显示面上。所述光学胶层20设置于该电子纸显示模组10与导光板30之间，用于将导光板30粘附于该电子纸显示模组10显示面上。所述驱动电路板50一端通过粘黏剂40粘附于所述导光板30上，另一端用于安装LED灯60。
所述电泳显示模组10可以是微胶囊式电泳显示模组、微杯式电泳显示模组等反射型显示模组。以微胶囊电泳显示模组为例，如图10，该微胶囊电泳显示模组依次包括基板层11、微胶囊电泳显示层12、透明电极层13。所述微胶囊电泳显示层为固态电泳显示层。所述基板层11有多个像素电极，可以为TFT玻璃基板层。所述微胶囊电泳显示层12中包裹有透明的电泳液、带正电荷或负电荷的一种颜色的粒子以及中性的另一种颜色的粒子。在基板层11和透明电极层13之间施加的驱动电压驱动下，带电的颜料粒子在微胶囊中移动进行显示。当然在其他实施例中，所述微胶囊电泳显示层12中包裹有透明的电泳液、带正电荷的一种颜色的粒子和带负电荷的另一种颜色的粒子，在驱动电压的驱动下，带电的粒子在微胶囊中移动进行显示。
所述光学胶层20用于胶结导光板30与电泳显示模组10。该光学胶层20所采用的光学胶要求具有无色透明、光透过率在90％以上、胶结强度良好，可在室温或中温下固化，且有固化收缩小等特点。有机硅橡胶、丙烯酸型树脂及不饱和聚酯、聚氨酯、环氧树脂等胶粘剂都可胶结光学元件。在配制时通常要加入一些处理剂，以改进其光学性能或降低固化收缩率。
所述导光板30是光学级的亚克力PMMA/PC板材。可以用高折射率的材料，在光学级的亚克力PMMA/PC板材的表面用UV网版印刷技术印上导光点。也可以通过注塑机一次射出成型，制造出带有凹或凸导光点的导光板30。从灯发出来的光进入导光板30内部，在导光板两面之间全反射传递到远端，当光线射到各个导光点时，会破坏全反射条件由导光板表面射出。通过各种疏密、大小不一的导光点设计，可使导光板均匀发光。
所述胶黏剂层40用于粘接所述导光板30与驱动电路板50。
参考图3，所述导光板30、驱动电路板50、LED灯60构成电子纸显示屏的前光照明装置。参考图4，所述驱动电路板50上焊接有一个或多个LED灯60构成灯条。所述驱动电路板50为柔性印刷电路板，用于驱动LED灯，其通过胶黏剂层40粘附于所述导光板30上。
参考图2及图5，所述LED灯60为侧面出光的LED灯，该LED灯包括与驱动电路板50连接的灯芯62，包裹于该灯芯62上的灯壳61。所述灯壳61靠近导光板30入光面33的一侧开有出光口，灯芯62通电后发光，光线通过灯壳61侧面的出光口射向导光板30的入光面33。
参考图11-14，上述电子纸显示屏中的所述导光板在一个实施方式中，该导光板30在其导光板主体的入光面33上设置有齿纹，该齿纹由多个弧形突起331形成的齿纹。所述多个弧形突起331的形状、大小一致，规则排列于所述入光面33上，这样有利于入射光束通过入光面33均匀地进入导光板。所述弧形突起331的高度h可以设置为0.05～0.25mm，例如0.05mm、0.1mm、0.12mm、0.15mm、0.2mm、0.25mm等,一般优选0.1～0.15mm。所述弧形突起331的宽度L可以设置为0.1～0.5mm，例如0.1mm、0.2mm、0.25mm、0.3mm、0.4mm等,一般优选0.2～0.3mm。两相邻所述弧形突起331之间的距离可以设置为0～0.5mm，例如0mm、0.05mm、0.1mm、0.12mm、0.15mm、0.2mm、0.25mm、0.3mm、0.4mm、0.5mm等，一般优选0～0.1mm。
参考图11及图13，所述电子纸显示屏的显示区域90以图11中的虚线为界，虚线处代表显示区域90的入光处91。所述弧形突起331使光束在入光面上形成多个入射角度，从而产生不同的折射角度，使光束在导光板内聚集后再发散，从而极大扩散进入导光板30中的光束，有效地缩小暗区B1的范围，使暗区B1远离显示区域90；扩大亮区A1的范围，使显示区域90完全处于亮区A1中。这样显示区域90靠近入光面一侧边缘的入光处91不会有暗区，从而使前光照明效果更好，显示区域显示效果更好。
参考图15-18，上述电子纸显示屏中的所述导光板在另一个实施方式中，所述导光板30在其导光板主体的入光面33上设置有齿纹，该齿纹由多个弧 形凹槽332形成的齿纹。所述多个弧形凹槽332的形状、大小一致，规则排列于所述入光面33上，这样有利于入射光束通过入光面33均匀地进入导光板。所述弧形凹槽332的高度h可以设置为0.05～0.25mm，例如0.05mm、0.1mm、0.12mm、0.15mm、0.2mm、0.25mm等,一般优选0.1～0.15mm。所述弧形突起332的宽度L可以设置为0.1～0.5mm，例如0.1mm、0.2mm、0.25mm、0.3mm、0.4mm等,一般优选0.2～0.3mm。两相邻所述弧形凹槽332之间的距离可以设置为0～0.5mm，例如0mm、0.05mm、0.1mm、0.12mm、0.15mm、0.2mm、0.25mm、0.3mm、0.4mm、0.5mm等，一般优选0～0.1mm。
所述电子纸显示屏的显示区域90以图15中的虚线为界，虚线处代表显示区域90的入光处91。所述弧形凹槽332使光束在入光面上形成多个入射角度，从而产生不同的折射角度，从而极大扩散进入导光板30中的光束，有效地缩小暗区B2的范围，使暗区B2远离显示区域90；扩大亮区A2的范围，使显示区域90完全处于亮区A2中。这样显示区域90靠近入光面一侧边缘的入光处91不会有暗区，从而使前光照明效果更好，显示区域显示效果更好。
参考图19-图20，上述电子纸显示屏中的所述导光板在一个实施方式中，该导光板30在其导光板主体的入光面33上设置有齿纹，该齿纹由多个角状凹槽333形成的齿纹。所述多个角状凹槽333的形状、大小一致，规则排列于所述入光面33上，这样有利于入射光束通过入光面33均匀地进入导光板。所述角状凹槽333的高度h可以设置为0.05～0.25mm，例如0.05mm、0.1mm、0.12mm、0.15mm、0.2mm、0.25mm等,一般优选0.1～0.15mm。所述角状凹槽333的宽度L可以设置为0.1～0.5mm，例如0.1mm、0.2mm、0.25mm、0.3mm、0.4mm等,一般优选0.2～0.3mm。两相邻所述角状凹槽333之间的距离M可以设置为0～0.5mm，例如0mm、0.05mm、0.1mm、0.2mm、0.3mm、0.4mm、0.5mm等，一般优选0.1～0.3mm。所述角状凹槽333使光束在入光面上形成多个入射角度，从而产生不同的折射角度，从而极大扩散进入导光板30中的光束，使前光照明效果更好，显示区域显示效果更好。
参见图6-图9，在另一实施例中，所述电子纸显示屏包括该电子纸显示 屏包括电子纸显示模组10、光学胶层20、导光板30、粘黏剂40、驱动电路板50、LED灯60。所述导光板30设置于所述电子纸显示模组10显示面上。所述光学胶层20设置于该电子纸显示模组10与导光板30之间，用于将导光板30粘附于该电子纸显示模组10显示面上。所述驱动电路板50一端通过粘黏剂40粘附于所述导光板30上，另一端用于安装LED灯60。
参考图6-图8，所述导光板30、驱动电路板50、LED灯60构成电子纸显示屏的前光照明装置；所述驱动电路板50上焊接有一个或多个LED灯60构成灯条。所述导光板30用于贴附于电泳显示模组10显示面的上方，其包括导光板主体，该导光板主体通过加长延伸伸入LED灯区域100，所述LED灯区域100是指LED灯所处位置及其相邻的一个区域，例如图9中所示虚线区域，在具有两个或两个以上的LED灯时，该LED灯区域100还应当包括LED灯之间的区域。所述导光板主体上设置有用于容置LED灯60的凹槽31，所述LED灯容置于该导光板30的凹槽31中，这样导光板主体通过这种形式伸入LED灯区域100中。所述LED灯被包容于所述凹槽31中，这样可以避免LED灯60受到挤压、磕碰，从而定位LED灯60的位置，避免发生位置偏移的现象；另外由于导光板30伸入了LED灯区域100，所述驱动电路板50能够通过导光板30的凹槽槽边32进行支撑，避免因驱动电路板50翘起等原因导致LED灯60的位置发生偏移；再者，导光板30伸入了LED灯区域100，有效降低LED灯60漏光的现象。
所述凹槽31贯穿导光板主体的上下面，这样便于凹槽31的加工，也便于将LED灯容置于凹槽31中。所述LED灯60呈长条形状，这样便于拓宽LED灯的发光面，即能够给导光板提供更宽范围的光照。所述凹槽31的形状、大小与LED灯60的形状、大小相适配，即该凹槽31也可以做成长条形凹槽，其深度与条状LED灯60的宽度相适配，这样所述LED灯60灯头顶部与所述凹槽31的槽口相平齐。
参考图21-22及图14，所述导光板的入光面33设置于凹槽31的底部。在一个实施方式中，该入光面33上设置有齿纹，该齿纹由多个弧形突起331 形成的齿纹。所述多个弧形突起331的形状、大小一致，规则排列于所述入光面33上，这样有利于入射光束通过入光面33均匀地进入导光板。所述弧形突起331的高度h可以设置为0.05～0.25mm，例如0.05mm、0.1mm、0.12mm、0.15mm、0.2mm、0.25等,一般优选0.1～0.15mm。所述弧形突起331的宽度L可以设置为0.1～0.5mm，例如0.1mm、0.2mm、0.25mm、0.3mm、0.4mm等,一般优选0.2～0.3mm。两相邻所述弧形突起331之间的距离可以设置为0～0.5mm，例如0mm、0.05mm、0.1mm、0.12mm、0.15mm、0.2mm、0.25mm、0.3mm、0.4mm、0.5mm等，一般优选0～0.1mm。
参考图21及图13，所述电子纸显示屏的显示区域90以图21中的虚线为界，虚线处代表显示区域90的入光处91。所述弧形突起331使光束在入光面上形成多个入射角度，从而产生不同的折射角度，使光束在导光板内聚集后再发散，从而极大扩散进入导光板30中的光束，有效地缩小暗区B3的范围，使暗区B3远离显示区域90；扩大亮区A3的范围，使显示区域90完全处于亮区A3中。这样显示区域90靠近入光面一侧边缘的入光处91不会有暗区，从而使前光照明效果更好，显示区域显示效果更好。
当然，在其他实施例中，所述齿纹还可以是由多个弧形凹槽形成的齿纹；也可以是由多个角状凹槽或多个角状突起形成的齿纹所述。
当然，在其他实施例中，上述相邻弧形凹槽、弧形突起、角状凹槽或角状突起可以是前后相互连接的；也可以是有一定间距的。
当然，在其他实施例中，所述LED灯数量可以设置为1个或2个以上，例如3个或4个等。
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (10)

  1. 一种电子纸显示屏导光板，其用于设置于电泳显示模组显示面的上方，其特征在于其包括导光板主体，所述导光板主体的入光面上设置有齿纹。
  2. 如权利要求1所述的一种导光板，其特征在于所述齿纹为由多个弧形突起或多个弧形凹槽或多个角状突起或多个角状凹槽形成的齿纹。
  3. 如权利要求2所述的一种导光板，其特征在于所述弧形突起或弧形凹槽或角状突起或角状凹槽的宽度为0.1～0.5mm。
  4. 如权利要求3所述的一种导光板，其特征在于所述弧形突起或弧形凹槽或角状突起或角状凹槽的宽度为0.2～0.3mm。
  5. 如权利要求2所述的一种导光板，其特征在于所述弧形突起或弧形凹槽或角状突起或角状凹槽的高度为0.05～0.25mm。
  6. 如权利要求5所述的一种导光板，其特征在于所述弧形突起或弧形凹槽或角状突起或角状凹槽的高度为0.1～0.15mm。
  7. 如权利要求2所述的一种导光板，其特征在于两相邻所述弧形突起或弧形凹槽或角状突起或角状凹槽之间的距离为0～0.5mm。
  8. 如权利要求1-7中任意一项所述的导光板，其特征在于所述导光板主体伸入LED灯区域，该导光板主体上设置有用于容置LED灯的凹槽。
  9. 一种电子纸显示屏，其包括电泳显示模组、导光板、设置于该电泳显示模组上的前光照明装置，其特征在于所述导光板为如权利要求1-8中任意一种所述的导光板。
  10. 如权利要求9所述的一种电子纸显示屏，其特征在于所述电泳显示模 组依次包括基板层、微胶囊电泳显示层以及透明电极层。
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CN203732748U (zh) * 2014-02-19 2014-07-23 广州奥翼电子科技有限公司 电子纸显示屏导光板及电子纸显示屏
CN203732852U (zh) * 2014-03-18 2014-07-23 广州奥翼电子科技有限公司 电子纸显示屏
CN203849531U (zh) * 2014-04-23 2014-09-24 广州奥翼电子科技有限公司 电子纸显示屏

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CN104849793A (zh) 2015-08-19
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US10935711B2 (en) 2021-03-02
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