WO2020019419A1 - 半反射半透射显示面板及采用该显示面板的显示装置 - Google Patents

半反射半透射显示面板及采用该显示面板的显示装置 Download PDF

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Publication number
WO2020019419A1
WO2020019419A1 PCT/CN2018/104933 CN2018104933W WO2020019419A1 WO 2020019419 A1 WO2020019419 A1 WO 2020019419A1 CN 2018104933 W CN2018104933 W CN 2018104933W WO 2020019419 A1 WO2020019419 A1 WO 2020019419A1
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Prior art keywords
reflective
substrate
semi
display area
display panel
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PCT/CN2018/104933
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English (en)
French (fr)
Inventor
刘凡成
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武汉华星光电技术有限公司
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Priority to US16/300,590 priority Critical patent/US20200319509A1/en
Publication of WO2020019419A1 publication Critical patent/WO2020019419A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133553—Reflecting elements
    • G02F1/133555—Transflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3058—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state comprising electrically conductive elements, e.g. wire grids, conductive particles
    • 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
    • G02F1/133371—Cells with varying thickness of the liquid crystal 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
    • G02F1/133528—Polarisers
    • G02F1/133548—Wire-grid polarisers
    • 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
    • G02F1/133553—Reflecting elements
    • G02F1/133555—Transflectors
    • G02F1/133557—Half-mirrors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2203/00—Function characteristic
    • G02F2203/09—Function characteristic transflective

Definitions

  • the invention relates to the field of display devices, in particular to a semi-reflective and transflective display panel and a display device using the display panel.
  • the display device includes a transmissive display device that performs display using transmitted light from a backlight on the back of the screen, and a reflective display device that performs display using reflected light from external light.
  • the transmissive display device has the advantages of high color saturation and easy to see the screen even in a dark environment.
  • the disadvantage is that the power consumption of the light source is large whether in a bright place or in a dark place.
  • the reflective display device has the advantages of low power consumption and easy to see the screen even in a bright environment. However, it has the disadvantage that it becomes difficult to see the screen as the amount of light decreases in a dark place.
  • the semi-reflective and transflective display device has the characteristics of both a transmissive display device and a reflective display device.
  • the transflective liquid crystal display device uses the transmitted light of the backlight for display in a dark environment, and uses the reflected light of external light for display in a bright environment.
  • the transflective and transflective liquid crystal display device is easy to see the screen in bright and dark environments, and consumes less power. Therefore, it is used as a display of an electronic device and is mainly used for a portable electronic device with a high frequency of outdoor use.
  • FIG. 1 is a schematic structural diagram of a conventional transflective display device.
  • the semi-reflective and transflective display device includes a liquid crystal panel 10 and a backlight 11.
  • the liquid crystal panel 10 includes an array substrate 100 and a color filter substrate 101 opposite to the array substrate 100.
  • a display area between the array substrate 100 and the color filter substrate 101 is filled with a liquid crystal layer 102.
  • FIG. 1 schematically illustrates the display area.
  • the display area includes a transmissive display area A and a reflective display area B.
  • the transmissive display area A the light of the backlight 11 can be directly transmitted through the liquid crystal panel 10, and then the transmissive display area A uses the transmitted light L1 of the backlight 11 for display.
  • a reflective layer 103 is provided on the array substrate 100. After the external light L2 enters the liquid crystal panel 10, it is reflected by the reflective layer 103 and exits. Then, the external display is used in the reflective display area B. The reflected light is displayed.
  • this semi-reflective and transflective display device also has disadvantages: when ensuring a large transmissive display area area in order to improve transmissive display performance, the area of the reflective display area has to be reduced accordingly, so the reflective display performance is reduced; on the contrary, it is necessary to ensure that When the reflective display device has the same reflective display performance, it is necessary to ensure a large area of the reflective display area, and accordingly the transmission display performance is reduced. Therefore, there is a trade-off relationship between ensuring the area of the transmission display area and ensuring the reflective display performance. Moreover, referring to FIG.
  • the technical problem to be solved by the present invention is to provide a semi-reflective and semi-transmissive display panel and a display device using the display panel, which can improve the brightness of the transmissive display and reduce the brightness while ensuring that the reflective performance of the reflective display area is unchanged.
  • the power consumption of the backlight module makes the semi-reflective and transflective display device have better battery life in outdoor display.
  • the present invention provides a semi-reflective and transflective display panel, which includes a first substrate and a second substrate.
  • the first substrate is disposed opposite to the second substrate, and the first substrate is disposed on the first substrate.
  • a liquid crystal layer is arranged between the second substrate and the second substrate.
  • the semi-reflective and transflective display panel has a display area, and the display area includes a transmissive display area and a reflective display area.
  • the A surface of the first substrate facing away from the second substrate is provided with a microstructured reflective layer capable of reflecting incident light from a backlight module, and the microstructured reflective layer is formed by a plurality of protrusions having an inclined angle.
  • the width of each of the protrusions is greater than the wavelength of visible light.
  • an external light reflection layer is provided on a surface of the first substrate facing the second substrate.
  • the present invention also provides a semi-reflective and transflective display panel, which includes a first substrate and a second substrate.
  • the first substrate is disposed opposite to the second substrate.
  • a liquid crystal layer is disposed between the substrate and the second substrate.
  • the semi-reflective and transflective display panel has a display area, and the display area includes a transmissive display area and a reflective display area. In the reflective display area, all A microstructure reflective layer is disposed on a surface of the first substrate facing away from the second substrate, and the microstructure reflective layer can reflect incident light from a backlight module.
  • the microstructure reflective layer is composed of a plurality of protrusions having an inclined angle.
  • the tilt angle satisfies a conditional expression:
  • ⁇ is the inclination angle of the protrusion
  • h is the height of the gap between the backlight module and the first substrate
  • L ′ is the length of the reflective display area
  • the tilt angle is greater than 75 degrees.
  • the tilt angle is equal to 75 degrees.
  • the width of each protrusion is greater than the wavelength of visible light.
  • the heights of the protrusions are different.
  • an external light reflection layer is disposed on a surface of the first substrate facing the second substrate in the reflective display area.
  • a metal wire grid is disposed on a surface of the first substrate facing the second substrate in the transmissive display region.
  • the height of the metal lines of the metal wire grid is 100 nm to 150 nm
  • the pitch of the metal lines of the metal wire grid is 100 nm to 150 nm
  • the duty ratio of the metal wire grid is 40% to 60%.
  • a metal wire grid is disposed on a surface of the first substrate facing away from the second substrate in the transmissive display region.
  • the height of the metal lines of the metal wire grid is 100 nm to 150 nm
  • the pitch of the metal lines of the metal wire grid is 100 nm to 150 nm
  • the duty ratio of the metal wire grid is 40% to 60%.
  • the present invention also provides a semi-reflective transflective display device, which includes a semi-reflective transflective display panel and a backlight module, and the backlight module is disposed on the semi-reflective transflective display.
  • a semi-reflective transflective display device which includes a semi-reflective transflective display panel and a backlight module, and the backlight module is disposed on the semi-reflective transflective display.
  • the incident light of the backlight module is reflected from the transmissive display area through the microstructure reflection layer and the backlight module for multiple reflections.
  • An advantage of the present invention is that, by providing a microstructure reflective layer in the reflective display area B, the light of the reflective display area is directionally reflected, so that the light in the reflective display area can be reflected to the transmissive display area through the microstructure reflective layer and emitted. Increase the light utilization ratio of the back module of the reflective display area, increase the light output brightness of the transmissive display area, and improve the brightness of the transmissive display while ensuring the reflective performance of the reflective display area is unchanged, reducing the power consumption of the backlight module .
  • FIG. 1 is a schematic structural diagram of a conventional semi-reflective and transflective display device
  • FIG. 2 is a schematic structural diagram of a semi-reflective and transflective display panel according to an embodiment of the present invention
  • FIG. 3 is a light path diagram of a semi-reflective and transflective display panel according to the present invention
  • FIG. 5 is a schematic structural diagram of a semi-reflective and transflective display panel according to another embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a semi-reflective and transflective display device according to the present invention.
  • FIG. 2 is a schematic structural diagram of a semi-reflective and transflective display panel 2 according to an embodiment of the present invention
  • FIG. 3 is a light path diagram of the semi-reflective and transflective display panel according to the present invention.
  • the semi-reflective and transflective display panel 2 of the present invention includes a first substrate 20 and a second substrate 21.
  • the first substrate 20 is opposite to the second substrate 21.
  • a liquid crystal layer 22 is provided between the first substrate 20 and the second substrate 21.
  • the first substrate 20 is an array substrate having a TFT device layer 200 thereon
  • the second substrate 21 is a color filter substrate.
  • the semi-reflective and semi-transmissive display panel 2 includes a display area and a non-display area, the display area is used for displaying a screen, and the non-display area is used for making structures such as wiring and a frame.
  • the non-display area of the semi-reflective and semi-transmissive display panel 2 of the present invention is a conventional structure, which will not be described in detail.
  • FIG. 2 only schematically illustrates a schematic diagram of a display area.
  • the display area of the semi-reflective and transflective display panel 2 includes a transmissive display area A and a reflective display area B.
  • Each pixel of the semi-reflective and transflective display panel 2 has a transmissive display area and a reflective display area.
  • the transmissive display area of all pixels forms the transmissive display area of the semi-reflective and transflective display panel 2.
  • the display area forms a reflective display area of the semi-reflective and transflective display panel 2.
  • the technical solution of the present invention is described by taking a transmissive display area and a reflective display area of one pixel as examples.
  • the light L1 from the backlight module 30 can be directly transmitted through the semi-reflective transflective display panel 2, and then the backlight module is used in the transmissive display area A. 30 transmitted light display screen.
  • an external light reflection layer 23 is provided on a surface of the first substrate 20 facing the second substrate 21. After external light L2 enters the semi-reflective and transflective display panel 2, it passes through the The external light reflection layer 23 reflects and emits light, and further displays the screen with the reflected light of external light in the reflective display area B.
  • the external light reflection layer 23 may be disposed on a surface of the TFT device layer 200.
  • a surface of the first substrate 20 facing away from the second substrate 21 is provided with a microstructure reflective layer 24, and the microstructure reflective layer 24 can reflect the backlight. Incident light of the module 30.
  • the microstructure reflective layer 24 is disposed on the back surface of the first substrate 20, that is, the surface of the semi-reflective and transflective display panel 2 facing the back module 30.
  • the backlight L3 emitted by the back module 30 can be emitted by the microstructure reflective layer 24.
  • the structure of the microstructure reflective layer 24 shown in the figure is appropriately enlarged.
  • FIG. 3 is a light path diagram of a semi-reflective and transflective display panel according to the present invention.
  • the semi-reflective and semi-transmissive display panel 2 of the present invention uses the micro-structure
  • the reflection layer 24 can change the reflection direction of the backlight L3 emitted by the backlight module 30 at the display panel 2.
  • the backlight L3 forms a reflected light L3 ′ after being reflected by the microstructure reflection layer 24, and the reflected light L3 ′ is not incident on the surface of the back module 30 at an incident angle close to 90 degrees, but Is incident on the surface of the backlight module 30 at an incident angle of less than 90 degrees. Then, the backlight L3 (ie, the reflected light L3 'of the backlight L3) will be reflected by the backlight module 30 again, so as to have a chance to be incident on the transmissive display area A, and then be used as a light source of the transmissive display area A.
  • the backlight L3 is reflected by the backlight module 30 again, it is not incident on the transmissive display area A, but is incident on the microstructure reflection layer 24 again. Then, the light passing through the microstructure reflection layer 24 and the backlight module 30 After reflecting again or even multiple times, it will eventually be incident on the transmissive display area A. That is, in the reflective display area B, the incident light of the backlight module 30 can be emitted from the transmissive display area A after being reflected by the microstructure reflective layer 24 and the backlight module 30 multiple times.
  • the microstructure reflective layer 24 is composed of a plurality of protrusions 241.
  • the width of the protrusion 241 is greater than the wavelength of visible light.
  • the width of the protrusion 241 is greater than 2 micrometers.
  • the heights of the protrusions 241 are different, as shown in FIG. 2, thereby preventing the protrusions 241 from blocking each other, and improving the utilization rate of reflected light.
  • FIG. 4 is a schematic diagram of an optical path of the protrusion 241.
  • each of the protrusions 241 has an inclined angle ⁇ .
  • the inclination angle ⁇ refers to an included angle between a reflection surface of the protrusion 241 and a vertical surface. Since the inclination angle of the protrusion 241 is ⁇ , the incident angle of the reflected light L3 'formed by the backlight L3 reflected by the microstructure reflection layer 24 on the rear module 30 is 180-2 ⁇ .
  • the inclination angle ⁇ of the protrusion 241 needs to satisfy the following conditional expression:
  • the width and length of the pixel are known. After the width and length of the pixel and the required reflectivity are designed, the length L ′ of the reflective display area B can be obtained.
  • the inclination angle ⁇ satisfies this conditional expression, it can be ensured that the reflected light of the protrusion 241 at the outermost edge of the reflective display area B can also enter the transmissive display area A. Further, if the inclination angle ⁇ is greater than or equal to 75 degrees, after the multiple reflection of the microstructure reflection layer 24 and the backlight module 30, the transmitted light exit angle from the transmission display area A is greater than 70 degrees, and the light can Be effectively used.
  • the above-mentioned conditional formula is particularly applicable to the direct-type backlight module 30, and the double-side light-entry type and single-side light-type backlight module need not consider the above-mentioned conditional formula.
  • a metal wire grid 25 is disposed on a surface of the first substrate 20 facing the second substrate 21 or a surface of the first substrate 20 facing away from the second substrate 21.
  • the metal wire grid 25 is provided on a surface of the first substrate 20 facing the second substrate 21.
  • a surface of the first substrate 20 facing away from the second substrate 21 is provided with the metal wire grid 25.
  • the metal wire grid 25 is used as a polarizer of the semi-reflective and transflective display panel 2 of the present invention.
  • the metal wire grid 25 and the polarizer are not provided in the reflective display area B, so that the deterioration of the bonding performance of the polarizer caused by adding the microstructure reflective layer 24 can be avoided.
  • the height of the metal lines of the metal wire grid 25 is 100 nm to 150 nm
  • the pitch of the metal lines of the metal wire grid 25 is 100 nm to 150 nm
  • the duty ratio of the metal wire grid 25 is 40% to 60. %, Which can further improve the utilization rate of light emitted from the transmissive display area A after multiple reflections by the microstructure reflective layer 24 and the backlight module 30.
  • a surface of the second substrate 21 facing away from the first substrate 20 is provided with a polarizer 26, and the polarizer 26 is used in conjunction with the metal wire grid 25 to achieve The display of the semi-reflective and transflective display panel is described.
  • FIG. 6 is a schematic diagram of the internal structure of the semi-reflective and transflective display device 3.
  • the semi-reflective and transflective display device 3 includes a semi-reflective and transflective display panel 2 and a backlight module 30 as shown in FIG. 2 or FIG. 5 mentioned in any of the above embodiments.
  • the backlight module 30 is disposed on the back of the semi-reflective and transflective display panel 2.
  • the incident light L3 of the backlight module 30 is reflected by the microstructure reflection layer 24 and the backlight module 30 and then exits from the transmission display area A.
  • the semi-reflective and semi-transmissive display panel 2 and the display device using the display panel 2 of the present invention can provide a directional reflection of the light in the reflective display area B by providing a microstructure reflective layer 24 in the reflective display area B, so that the reflective display area can be reflected.
  • the light of B is reflected to the transmissive display area A through the microstructure reflective layer 24, and the light utilization rate of the back module of the reflective display area B is increased, and the light output brightness of the transmissive display area A is increased, thereby ensuring the reflection of the reflective display area B.
  • the brightness of the transmissive display is improved, and the power consumption of the backlight module is reduced, so that the semi-reflective and transflective display device has better endurance in outdoor display.

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

Abstract

一种半反射半透射显示面板(2)，其包括一第一基板(20)及一第二基板(21)，在第一基板(20)与第二基板(21)之间设置有一液晶层(22)，半反射半透射显示面板(2)具有一显示区域，显示区域包括透射显示区域(A)和反射显示区域(B)；在反射显示区域(B)，第一基板(20)背离第二基板(21)的表面设置有一微结构反射层(24)。

Description

半反射半透射显示面板及采用该显示面板的显示装置 技术领域
本发明涉及显示装置领域，尤其涉及一种半反射半透射显示面板及采用该显示面板的显示装置。
背景技术
显示装置具有利用屏幕背面的背光的透射光进行显示的透射型显示装置及利用外部光的反射光进行显示的反射型显示装置。透射型显示装置具有色饱和度高、在黑暗环境下也容易看清画面的优点，其缺点在于，不管是在亮处还是在暗处，光源的电力消耗大。反射型显示装置具有功耗少、即使在明亮环境下也容易看清画面的优点，其缺点在于，在暗处随着光量的减少就难以看清画面。
鉴于上述两种显示装置的缺点，一种半反射半透射显示装置应运而生。半反射半透射显示装置兼有透射型显示装置和反射型显示装置的特征。半反半透型液晶显示装置在暗环境下使用背光的透射光进行显示，在亮环境下使用外部光的反射光进行显示。半反半透型液晶显示装置在亮环境下和暗环境下都容易看清画面，而且功耗少。因此，被用作电子设备的显示器，且主要用于户外的使用频率高的便携型电子设备。
技术问题
图1是现有的半反射半透射显示装置的结构示意图。请参阅图1，所述半反射半透射显示装置包括一液晶面板10及一背光源11。所述液晶面板10包括一阵列基板100及与所述阵列基板100相对的彩膜基板101，在所述阵列基板100与的彩膜基板101之间的显示区域填充有液晶层102。图1中仅示意性地绘示出显示区域的示意图。其中，所述显示区域具有透射显示区域A和反射显示区域B。在透射显示区域A，背光源11的光可直接透过液晶面板10出射，进而在透射显示区域A利用背光源11的透射光L1进行显示。在所述反射显示区域B，在所述阵列基板100上设置有一反射层103，外部光L2进入液晶面板10后，经所述反射层103反射后出射，进而在所述反射显示区域B利用外部光的反射光进行显示。
但是，该半反射半透射显示装置也存在缺点：为了提高透射显示性能而确保大的透射显示区域面积时，不得不相应减小反射显示区域的面积，故反射显示性能下降；相反，要保证与反射型显示装置同等的反射显示性能时，必须确保大的 反射显示区域面积，相应地透射显示性能下降，因此，确保透射显示区域的面积和保证反射显示性能存在权衡的关系。且，请参阅图1，在半反射半透射显示装置中，在所述反射显示区域B，由于反射层103不透光，则背光源11发出的光L3经反射层103后被反射回背光源11，该部分光源不能有效利用，导致在反射显示区域B的背光源利用率低。
鉴于上述半反射半透射显示装置的缺点，发展一种新型的半反射半透射显示面板及采用该显示面板的显示装置具有重大意义。
技术解决方案
本发明所要解决的技术问题是，提供一种半反射半透射显示面板及采用该显示面板的显示装置，其能够在保证反射显示区域的反射性能不变的基础上提升了透射显示的亮度，降低背光模组的功耗，使得半反射半透射显示装置在户外显示中具有更好的续航能力。
为了解决上述问题，本发明提供了一种半反射半透射显示面板，其包括一第一基板及一第二基板，所述第一基板与所述第二基板相对设置，在所述第一基板与所述第二基板之间设置有一液晶层，所述半反射半透射显示面板具有一显示区域，所述显示区域包括一透射显示区域和一反射显示区域；在所述反射显示区域，所述第一基板背离所述第二基板的表面设置有一微结构反射层，所述微结构反射层能够反射来自一背光模组的入射光，所述微结构反射层由多个具有一倾斜角度的凸起组成，每一所述凸起的宽度大于可见光的波长，在所述反射显示区域，在所述第一基板朝向所述第二基板的表面设置有一外部光反射层。
为了解决上述问题，本发明还提供了一种半反射半透射显示面板，其包括一第一基板及一第二基板，所述第一基板与所述第二基板相对设置，在所述第一基板与所述第二基板之间设置有一液晶层，所述半反射半透射显示面板具有一显示区域，所述显示区域包括一透射显示区域和一反射显示区域；在所述反射显示区域，所述第一基板背离所述第二基板的表面设置有一微结构反射层，所述微结构反射层能够反射来自一背光模组的入射光。
在一实施例中，所述微结构反射层由多个具有一倾斜角度的凸起组成。
在一实施例中，所述倾斜角度满足条件式：
Figure PCTCN2018104933-appb-000001
其中，α表示所述凸起的倾斜角度，h为背光模组与第 一基板之间的间隙的高度，L'为反射显示区域的长度。
在一实施例中，所述倾斜角度大于75度。
在一实施例中，所述倾斜角度等于75度。
在一实施例中，每一凸起的宽度大于可见光的波长。
在一实施例中，其中所述凸起的高度不同。
在一实施例中，在所述反射显示区域，在所述第一基板朝向所述第二基板的表面设置有一外部光反射层。
在一实施例中，在所述透射显示区域，在所述第一基板朝向所述第二基板的表面设置有一金属线栅。
在一实施例中，所述金属线栅的金属线的高度为100nm～150nm，金属线栅的金属线的间距为100nm～150nm，所述金属线栅的占空比为40％～60％。
在一实施例中，在所述透射显示区域，在所述第一基板背离所述第二基板的表面设置有一金属线栅。
在一实施例中，所述金属线栅的金属线的高度为100nm～150nm，金属线栅的金属线的间距为100nm～150nm，所述金属线栅的占空比为40％～60％。
为了解决上述技术问题，本发明还提供一种半反射半透射显示装置，其包括一上述的半反射半透射显示面板及一背光模组，所述背光模组设置在所述半反射半透射显示面板的一背面，在反射显示区域，所述背光模组的入射光经所述微结构反射层及所述背光模组多重反射后从所述透射显示区域出射。
有益效果
本发明的优点在于，通过在反射显示区域B设置微结构反射层，使得反射显示区域的光有指向性的反射，即可将反射显示区域的光通过微结构反射层反射到透射显示区域出射，增加了反射显示区域的背面模组的光的利用率、增加透射显示区域的出光亮度，在保证反射显示区域的反射性能不变的基础上提升了透射显示的亮度，降低背光模组的功耗。
附图说明
图1是现有的半反射半透射显示装置的一结构示意图；
图2是本发明半反射半透射显示面板在其中一实施例中的结构示意图；
图3是本发明半反射半透射显示面板光路图
图4是凸起的光路示意图；
图5是本发明半反射半透射显示面板在另一实施例中的结构示意图；
图6是本发明半反射半透射显示装置的一结构示意图。
本发明的最佳实施方式
下面结合附图对本发明提供的半反射半透射显示面板及采用该显示面板的显示装置的具体实施方式做详细说明。
本发明提供一种半反射半透射显示面板。图2是本发明半反射半透射显示面板2在其中一实施例中的结构示意图，图3是本发明半反射半透射显示面板光路图。请参阅图2，本发明半反射半透射显示面板2包括一第一基板20及一第二基板21。所述第一基板20与所述第二基板21相对设置。在所述第一基板20与所述第二基板21之间设置有液晶层22。在本实施例中，所述第一基板20为阵列基板，其上具有TFT器件层200，所述第二基板21为彩膜基板。
所述半反射半透射显示面板2包括显示区域及非显示区域，所述显示区域用于显示画面，所述非显示区域用于制作走线及边框等结构。本发明半反射半透射显示面板2的非显示区域为常规结构，不再赘述，图2中仅示意性地绘示出显示区域的示意图。
所述半反射半透射显示面板2的显示区域包括透射显示区域A和反射显示区域B。所述半反射半透射显示面板2的每一个像素均具有一透射显示区域和一反射显示区域，所有像素的透射显示区域形成所述半反射半透射显示面板2的透射显示区域，所有像素的反射显示区域形成所述半反射半透射显示面板2的反射显示区域。在本实施例中，以一个像素的透射显示区域和反射显示区域为例描述本发明的技术方案。
请同时参阅图2、图3，在所述透射显示区域A，来自背光模组30的光L1可直接透过所述半反射半透射显示面板2出射，进而在透射显示区域A利用背光模组30的透射光显示画面。在所述反射显示区域B，在所述第一基板20朝向所述第二基板21的表面设置有一外部光反射层23，外部光L2进入所述半反射半透射显示面板2后，经所述外部光反射层23反射后出射，进而在所述反射显示区域B利用外部光的反射光显示画面。其中，所述外部光反射层23可以设置在所述TFT器件层200的表面。
请同时参阅图2、图3，在所述反射显示区域B，所述第一基板20背离所述第二基板21的表面设置有一微结构反射层24，所述微结构反射层24能够反射背光模组30的入射光。由于所述微结构反射层24设置在所述第一基板20的背面，即所述半反射半透射显示面板2朝向所述背面模组30的表面。在所述反射显示区域B，所述背面模组30发射的背光L3能够被所述微结构反射层24发射。为了清楚描述本发明的技术方案，图中所示的微结构反射层24的结构被适当放大。
图3是本发明半反射半透射显示面板光路图。请参阅图3，与现有技术中未设置所述微结构反射层24的半反射半透射显示面板10(标号见图1)相比，本发明半反射半透射显示面板2采用所述微结构反射层24能够改变背光模组30发射的背光L3在显示面板2处的反射方向。详细来讲，背光L3经过所述微结构反射层24的反射后形成一反射光L3’，而该反射光L3’并非以接近90度的入射角入射在所述背面模组30的表面，而是以小于90度的入射角入射在所述背光模组30的表面。那么该背光L3(即背光L3的反射光L3’)会再次被所述背光模组30反射，从而有机会入射至透射显示区域A，进而作为透射显示区域A的光源被使用。若所述背光L3再次被所述背光模组30反射后，没有入射至透射显示区域A，而是再次入射至微结构反射层24，那么经过所述微结构反射层24及背光模组30的再次甚至多次反射后，其最终必然会入射至透射显示区域A。也就是说，在反射显示区域B，所述背光模组30的入射光经所述微结构反射层24及背光模组30多重反射后就能够从所述透射显示区域A出射。
进一步，如图2、图3所示，所述微结构反射层24由多个凸起241组成。所述凸起241的宽度大于可见光的波长，例如，所述凸起241的宽度大于2微米。所述凸起241的高度不同，如图2所示，进而可以避免凸起241之间彼此遮挡，提高反射光的利用率。
图4是所述凸起241的光路示意图。请参阅图4，所述凸起241均具有一倾斜角度α。所述倾斜角度α指的是所述凸起241的反射面与垂直面的夹角。由于所述凸起241的倾斜角度为α，则背光L3被所述微结构反射层24反射后形成的反射光L3’在背面模组30上的入射角度为180‐2α。
在本实施例中，所述凸起241的倾斜角度α需满足如下条件式：
Figure PCTCN2018104933-appb-000002
其中α表示所述凸起241的倾斜角度；h为背光模组30与第一基板20之间的间隙的高度，L'为反射显示区域B的长度。在半反射半透射显示面板的实际设计中，像素的宽及长已知，根据像素的宽及长和要求设计的反射率后，就能够得到反射显示区域B的长度L'。
当倾斜角度α满足该条件式时，可以保证反射显示区域B的最边缘的凸起241的反射光也能够进入透射显示区域A。进一步，所述倾斜角度α大于或等于75度，则经过所述微结构反射层24及背光模组30多重反射后从所述透射显示区域A出射的透射光出射角度大于70度，该光能够被有效利用。此外，上述条件式尤其适用于直下式背光模组30，而在双侧入光式和单侧入光式的背光模组中则不需要再考虑上述条件式。
进一步，在所述透射显示区域A，在所述第一基板20朝向所述第二基板21的表面或所述第一基板20背离所述第二基板21的表面设置有一金属线栅25。
请参阅图2及图3，在所述第一基板20朝向所述第二基板21的表面设置有所述金属线栅25。
本发明的实施方式
请参阅图5，在本发明半反射半透射显示面板2的另一实施例中，所述第一基板20背离所述第二基板21的表面设置有所述金属线栅25。其中，所述金属线栅25作为本发明半反射半透射显示面板2的偏光片使用。
如图2、图3所示，在反射显示区域B并未设置所述金属线栅25及偏光片，从而能够避免增加微结构反射层24而导致的偏光片的贴合性能变差的情况发生。优选地，所述金属线栅25的金属线的高度为100nm～150nm，所述金属线栅25的金属线的间距为100nm～150nm，所述金属线栅25的占空比为40％～60％，其能够进一步提高经所述微结构反射层24及背光模组30多重反射后从所述透射显示区域A出射的光的利用率。
进一步，如图2、图3所示，在所述第二基板21背离所述第一基板20的表面设置有偏光片26，所述偏光片26与所述金属线栅25配合使用，实现所述半反射半透射显示面板的显示。
本发明还提供一种半反射半透射显示装置，其可以是电脑电视或智能电子产品等。图6所示为半反射半透射显示装置3的内部结构示意图。请参阅图6，所述半反射半透射显示装置3包括一在上述任一实施例中提到的如图2或图5所示的半反射半透射显示面板2及背光模组30。所述背光模组30设置在所述半反射半透射显示面板2的背面。在反射显示区域B，所述背光模组30的入射光L3经所述微结构反射层24及背光模组30双重反射后从所述透射显示区域A出射。
本发明半反射半透射显示面板2及采用该显示面板2的显示装置通过在反射显示区域B设置微结构反射层24，使得反射显示区域B的光有指向性的反射，即可将反射显示区域B的光通过微结构反射层24反射到透射显示区域A出射，增加了反射显示区域B的背面模组的光的利用率、增加透射显示区域A的出光亮度，在保证反射显示区域B的反射性能不变的基础上提升了透射显示的亮度，降低背光模组的功耗，使得半反射半透射显示装置在户外显示中具有更好的续航能力。

Claims (14)

  1. 一种半反射半透射显示面板，其包括一第一基板及一第二基板，所述第一基板与所述第二基板相对设置，在所述第一基板与所述第二基板之间设置有一液晶层，所述半反射半透射显示面板具有一显示区域，所述显示区域包括一透射显示区域和一反射显示区域；在所述反射显示区域，所述第一基板背离所述第二基板的表面设置有一微结构反射层，所述微结构反射层能够反射来自一背光模组的入射光，所述微结构反射层由多个具有一倾斜角度的凸起组成，每一所述凸起的宽度大于可见光的波长，在所述反射显示区域，在所述第一基板朝向所述第二基板的表面设置有一外部光反射层。
  2. 一种半反射半透射显示面板，其包括一第一基板及一第二基板，所述第一基板与所述第二基板相对设置，在所述第一基板与所述第二基板之间设置有一液晶层，所述半反射半透射显示面板具有一显示区域，所述显示区域包括一透射显示区域和一反射显示区域；在所述反射显示区域，所述第一基板背离所述第二基板的表面设置有一微结构反射层，所述微结构反射层能够反射来自一背光模组的入射光。
  3. 根据权利要求2所述的半反射半透射显示面板，其中所述微结构反射层由多个具有一倾斜角度的凸起组成。
  4. 根据权利要求3所述的半反射半透射显示面板，其中所述倾斜角度满足条件式：
    Figure PCTCN2018104933-appb-100001
    其中，α表示所述凸起的倾斜角度，h为背光模组与第一基板之间的间隙的高度，L'为反射显示区域的长度。
  5. 根据权利要求4所述的半反射半透射显示面板，其中所述倾斜角度大于75度。
  6. 根据权利要求4所述的半反射半透射显示面板，其中所述倾斜角度等于75度。
  7. 根据权利要求3所述的半反射半透射显示面板，其中每一凸起的宽度大于可见光的波长。
  8. 根据权利要求3所述的半反射半透射显示面板，其中所述凸起的高度不同。
  9. 根据权利要求2所述的半反射半透射显示面板，其中在所述反射显示区域，在所述第一基板朝向所述第二基板的表面设置有一外部光反射层。
  10. 根据权利要求2所述的半反射半透射显示面板，其中在所述透射显示区域，在所述第一基板朝向所述第二基板的表面设置有一金属线栅。
  11. 根据权利要求10所述的半反射半透射显示面板，其中所述金属线栅的金属线的高度为100nm～150nm，金属线栅的金属线的间距为100nm～150nm，所述金属线栅的占空比为40％～60％。
  12. 根据权利要求2所述的半反射半透射显示面板，其中在所述透射显示区域，在所述第一基板背离所述第二基板的表面设置有一金属线栅。
  13. 根据权利要求12所述的半反射半透射显示面板，其中所述金属线栅的金属线的高度为100nm～150nm，金属线栅的金属线的间距为100nm～150nm，所述金属线栅的占空比为40％～60％。
  14. 一种半反射半透射显示装置，其包括一如权利要求2所述的半反射半透射显示面板及一背光模组，所述背光模组设置在所述半反射半透射显示面板的一背面，在反射显示区域，所述背光模组的入射光经所述微结构反射层及所述背光模组多重反射后从所述透射显示区域出射。
PCT/CN2018/104933 2018-07-27 2018-09-11 半反射半透射显示面板及采用该显示面板的显示装置 WO2020019419A1 (zh)

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US20080106676A1 (en) * 2006-11-06 2008-05-08 Osamu Itou Liquid Crystal Display Device
CN101191934A (zh) * 2006-12-01 2008-06-04 群康科技(深圳)有限公司 半穿透半反射式液晶显示器
CN101393346A (zh) * 2008-11-19 2009-03-25 友达光电股份有限公司 液晶显示模块
CN103018949A (zh) * 2012-12-07 2013-04-03 京东方科技集团股份有限公司 一种液晶面板以及透反式液晶显示器
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US20080106676A1 (en) * 2006-11-06 2008-05-08 Osamu Itou Liquid Crystal Display Device
CN101191934A (zh) * 2006-12-01 2008-06-04 群康科技(深圳)有限公司 半穿透半反射式液晶显示器
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