WO2016090715A1 - 透反式液晶面板以及液晶显示器 - Google Patents

透反式液晶面板以及液晶显示器 Download PDF

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Publication number
WO2016090715A1
WO2016090715A1 PCT/CN2015/070120 CN2015070120W WO2016090715A1 WO 2016090715 A1 WO2016090715 A1 WO 2016090715A1 CN 2015070120 W CN2015070120 W CN 2015070120W WO 2016090715 A1 WO2016090715 A1 WO 2016090715A1
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WIPO (PCT)
Prior art keywords
liquid crystal
polarizing plate
crystal panel
layer
area
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PCT/CN2015/070120
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English (en)
French (fr)
Inventor
谢畅
Original Assignee
深圳市华星光电技术有限公司
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Priority to US14/422,357 priority Critical patent/US9645440B2/en
Publication of WO2016090715A1 publication Critical patent/WO2016090715A1/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
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    • 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
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    • G02F1/1333—Constructional arrangements; Manufacturing methods
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    • 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
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    • 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
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    • 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
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    • 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
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    • 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
    • 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
    • G02F1/1343—Electrodes
    • 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
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • 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
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G02F1/134363—Electrodes characterised by their geometrical arrangement for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
    • 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
    • G02F1/1343—Electrodes
    • G02F1/13439—Electrodes characterised by their electrical, optical, physical properties; materials therefor; method of making
    • 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
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    • G—PHYSICS
    • G02—OPTICS
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    • 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
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    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
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    • G02F2203/00—Function characteristic
    • G02F2203/01—Function characteristic transmissive

Definitions

  • the invention belongs to the technical field of liquid crystal display, and relates to a transflective liquid crystal panel and a liquid crystal display comprising the liquid crystal panel.
  • the liquid crystal panel is a key component in the liquid crystal display.
  • the liquid crystal panel is mainly formed by a color film substrate and an array substrate.
  • the color film substrate and the array substrate are filled with liquid crystal to form a liquid crystal cell.
  • the liquid crystal panel can be classified into transmissive, reflective, and transflective according to the type of the light source.
  • the transmissive liquid crystal panel mainly uses a backlight as a light source, and a backlight is disposed behind the liquid crystal panel.
  • the pixel electrode on the array substrate is a transparent electrode as a transmissive area, which is favorable for the light of the backlight to be transmitted through the liquid crystal layer to display an image.
  • the reflective liquid crystal panel is mainly a light source or an external light source as a light source, and the array substrate adopts a metal or other reflective electrode with a good reflective property as a reflective region, and is suitable for reflecting light of the front light source or the external light source; the transflective liquid crystal
  • the display panel can be regarded as a combination of a transmissive and a reflective liquid crystal display panel.
  • the array substrate is provided with both a reflective area and a transmissive area, and the backlight and the front light source or the external light source can be simultaneously used for display.
  • the advantage of the transmissive liquid crystal panel is that it can display bright images in a dark environment, but the disadvantage is that the light that can be transmitted accounts for a small proportion of the light emitted by the backlight, and the backlight utilization rate is not high, so that it is necessary to increase the display brightness. The amplitude increases the brightness of the backlight and therefore the energy consumption is high.
  • the advantage of the reflective liquid crystal panel is that it can utilize an external light source and the power consumption is relatively low, but the disadvantage is that the image cannot be displayed in the dark due to the dependence on the external light source.
  • the transflective liquid crystal panel combines the advantages of a transmissive and reflective liquid crystal display panel to display bright images in a dark environment, indoors, or outdoors. Therefore, it is widely used in display devices for portable mobile electronic products, such as mobile phones, digital cameras, handheld computers, GPRS and other mobile products.
  • the shortcoming of the transflective liquid crystal panel is that the light emitted from the transmissive region passes through only one liquid crystal layer, and the light emitted from the reflective region passes through the liquid crystal layer twice, thus causing a transflective liquid crystal display.
  • the light emitted by different light sources in the device is different in the light path (optical path) between the reflective region and the transmissive region, so that the color difference between the transmissive region and the reflective region is large, resulting in color misalignment of the image displayed in the transflective liquid crystal display.
  • the transflective liquid crystal panel In order to improve the phenomenon of color inconsistency, at present, the transflective liquid crystal panel usually adopts a double-box thick pitch design method, that is, the cell thickness of the liquid crystal cell corresponding to the reflective region is half of the cell thickness of the liquid crystal cell corresponding to the transmissive region, so as to ensure The phase retardation amount of the liquid crystal of the reflection region is equal to the phase retardation amount of the liquid crystal of the transmission region (that is, the phase retardation amount of the light passing through the two regions can be matched), thereby ensuring small color difference and color coordination of the transmission region and the reflection region.
  • the transflective liquid crystal panel of such a structure has a complicated manufacturing process of the liquid crystal panel due to the difference in the thickness of the liquid crystal cell, and the uniformity of the thickness of the cell is not easily controlled.
  • the technical problem to be solved by the present invention is to provide a transflective liquid crystal panel and a liquid crystal display including the liquid crystal panel, which guarantees a transmissive area, in view of the deficiencies of the transflective liquid crystal panel in the prior art.
  • the thickness of the liquid crystal cell of the reflective area is equal, the manufacturing process of the liquid crystal panel is simplified; and the color difference between the transmissive area and the reflective area is small and the color is coordinated, thereby improving the display quality of the liquid crystal display.
  • a transflective liquid crystal panel comprising an array substrate and a color filter substrate disposed opposite to each other and a liquid crystal layer between the array substrate and the color filter substrate, the array substrate comprising a plurality of pixel regions, each of the pixel regions a transmissive region and a reflective region, wherein the array substrate further includes a plurality of pixel electrodes located in the pixel region, each of the pixel electrodes being in a strip shape and spaced apart from each other; wherein the transmissive region is located
  • the bending angle of the pixel electrode is ⁇ 1, the bending angle of the pixel electrode located in the reflection area is ⁇ 2, and ⁇ 1 ⁇ 2, so that the phase retardation amount of the transmission region and the phase retardation amount of the reflection region Match.
  • the array substrate is further provided with a reflective layer, the reflective layer covering area is a reflective area, and the uncovered area of the reflective layer is a transmissive area.
  • the array substrate is further provided with a common electrode layer, the common electrode layer covers the reflective layer, the common electrode layer is provided with an insulating layer, and the plurality of pixel electrodes are located on the insulating layer.
  • the common electrode layer and the plurality of pixel electrodes are electrically insulated by the insulating layer.
  • the optical path difference of the transmission region is twice the optical path difference of the reflection region.
  • the liquid crystal panel further includes a first polarizer and a second polarizer.
  • the first polarizer is disposed on a side of the color filter substrate away from the liquid crystal layer, and the second polarizer is disposed on the array substrate. Keep away from liquid On one side of the crystal layer, the transmission axis of the first polarizer is parallel to the transmission axis of the second polarizer.
  • the initial orientation of the liquid crystal molecules of the liquid crystal layer is parallel to the transmission axis of the polarizer.
  • the liquid crystal of the liquid crystal layer is a positive liquid crystal.
  • a portion corresponding to the transmissive area and a portion corresponding to the reflective area have the same thickness.
  • a liquid crystal display including a liquid crystal panel and a backlight module, wherein the liquid crystal panel is disposed opposite to the backlight module, and the backlight module provides a display light source to the liquid crystal panel, wherein
  • the liquid crystal panel employs a transflective liquid crystal panel as described above.
  • the transflective liquid crystal panel provided by the embodiment of the invention has a strip-shaped pixel electrode with different bending angles disposed in the transmissive area and the reflective area, wherein the pixel electrode in the transmissive area has a smaller bending angle than the reflective area
  • the bending angle of the pixel electrode in the middle can ensure the matching of the phase retardation amount of the liquid crystal in the transmissive area and the reflective area, so there is no need to change the cell thickness of the liquid crystal cell in the liquid crystal panel, and in the case where the thickness of the liquid crystal layer remains the same, Simplify the manufacturing process of the liquid crystal panel, and also improve the display quality of the liquid crystal display.
  • FIG. 1 is a schematic structural diagram of a transflective liquid crystal panel according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural view of a pixel electrode in a pixel region in an embodiment of the present invention.
  • FIG. 3 is a top plan view of a liquid crystal layer in the embodiment of the present invention when no voltage is applied.
  • FIG. 4 is a top plan view showing a liquid crystal layer when a voltage is applied in an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a liquid crystal display according to an embodiment of the present invention.
  • the transflective liquid crystal panel provided by the embodiment includes an array substrate 10 and a color filter substrate 20 disposed opposite to each other, and a liquid crystal layer 30 between the array substrate 10 and the color filter substrate 20 .
  • the array substrate 10 includes a plurality of pixel regions 40, each of which includes a transmissive region 41 and a reflective region 42.
  • the array substrate 10 further includes a plurality of pixel electrodes 50 located in the pixel region 40, and each of the pixel electrodes 50 has a bent strip shape and is spaced apart from each other.
  • the angle of the bend of the pixel electrode 50 in the transmissive region 41 is ⁇ 1
  • the angle of the bend of the pixel electrode 50 located in the reflective region 42 is ⁇ 2
  • ⁇ 1 ⁇ ⁇ 2 so that the transmissive region 41
  • the amount of phase delay matches the amount of phase delay of the reflective region 42.
  • the array substrate 10 is further provided with a reflective layer 60 , the reflective layer 60 covers the reflective region 42 , and the uncovered region of the reflective layer 60 is the transmissive region 42 .
  • the array substrate 10 is further provided with a common electrode layer 70 covering the reflective layer 60.
  • the common electrode layer 70 is provided with an insulating layer 80, and the plurality of pixel electrodes 50 are disposed. Located on the insulating layer 80, the common electrode layer 70 and the plurality of pixel electrodes 50 are electrically insulated by the insulating layer 80.
  • the liquid crystal panel further includes a first polarizing plate 91 and a second polarizing plate 92.
  • the first polarizing plate 91 is disposed on a side of the color filter substrate 20 away from the liquid crystal layer 30, and the second polarizing film 92 is disposed on a side of the array substrate 10 away from the liquid crystal layer 30, and the transmission axis of the first polarizing plate 91 is parallel to the transmission axis of the second polarizing plate 92 (as in the X direction in FIG. 2).
  • the liquid crystal in the liquid crystal layer 30 is a positive liquid crystal.
  • FIG. 3 is a schematic top view of the liquid crystal layer in the embodiment without voltage applied. As shown in FIG. 3, in the present embodiment, the initial orientation of the liquid crystal molecules in the liquid crystal layer 30 is parallel to the transmission axis of the polarizing plates 91, 92.
  • the angle of the bend of the pixel electrode 50 in the transmissive area 41 is ⁇ 1
  • the angle of the bend of the pixel electrode 50 in the reflective area 42 is ⁇ 2, where ⁇ 1 ⁇ 2 .
  • the inclination angle of the pixel electrode located in the transmission region is larger than the inclination angle of the pixel electrode located in the reflection region.
  • the inclination angle of the pixel electrode refers to an angle between the pixel electrode and a direction perpendicular to the transmission axis of the polarizing plates 91, 92 (in the Y direction in FIG. 2). As shown in FIG. 2, the inclination angle of the pixel electrode 50 located in the transmission region 41 is ⁇ 1, and the inclination angle of the pixel electrode 50 located in the reflection region 42 is ⁇ 2, where ⁇ 1> ⁇ 2.
  • FIG. 4 is a top plan view of the liquid crystal layer in the present embodiment when a voltage is applied.
  • a voltage is applied to the pixel electrode 50, in the transmissive region 41, since the tilt angle of the pixel electrode 50 is large, an electric field having a large tilt angle can be generated, and the liquid crystal molecules generate a large deflection angle ⁇ 1 under the action of the electric field.
  • Light passing through the transmissive region 41 produces a large amount of horizontal phase retardation.
  • the reflective region 42 since the tilt angle of the pixel electrode 50 is small, an electric field having a small tilt angle can be generated, and the liquid crystal molecules generate a small degree of deflection angle ⁇ 2 under the action of the electric field, and the light passing through the reflective region 42 is generated.
  • a small amount of horizontal phase delay since the tilt angle of the pixel electrode 50 is small, an electric field having a small tilt angle can be generated, and the liquid crystal molecules generate a small degree of deflection angle ⁇ 2 under the action of the electric field, and the light passing
  • the light passing through the transmissive region 41 produces more retardation than the reflective region 42, and the optical path difference of the transmissive region 41 is approximately the reflective region.
  • the optical path difference of 42 is twice, and the light of the reflective area 42 is equivalent to twice passing through the liquid crystal layer 30, so that the phase delay amount of the transmissive area and the reflective area can be matched, and finally half-transparent. Reverse display effect.
  • an experimental test method can be used to find an optimized angle.
  • the determination of the tilt angle relationship between the two is related to the properties of the liquid crystal (eg, birefringence properties, dielectric anisotropy properties, dielectric constant, etc.).
  • the following test method can be used to determine the tilt angle relationship between the two liquid crystal panels:
  • test panels are fabricated in accordance with a predetermined ratio of tilt angles, and these test panels are each filled with the above-described specific liquid crystal.
  • the VT (voltage-transmittance) curve characteristics of the transmissive area and the reflective area of the test panels are plotted. If the curve characteristics of the transmissive area and the reflective area of a test panel are consistent within the error range, then the transmissive area is The phase delay is approximately twice the phase delay of the reflective region, and the tilt angle of the pixel electrode of the transmissive region and the reflective region of the test panel can be used as a reference value in actual production.
  • the ratio is not limited, and in actual production, the amount of phase delay generated by the light of the transmissive region and the reflective region of the same pixel region passing through the liquid crystal layer is the same.
  • the thickness of the portion of the liquid crystal layer 30 corresponding to the reflective region 42 and the thickness of the portion corresponding to the transmissive region 41 are equal, that is, the liquid crystal panel is a single-box-thick transflective liquid crystal panel. Since the cell thickness of the liquid crystal cell in the liquid crystal panel is uniform, in the case where the thickness of the liquid crystal layer is kept uniform, the manufacturing process of the liquid crystal panel can be greatly simplified, and the display quality of the transflective liquid crystal display is also improved.
  • the embodiment also provides a liquid crystal display.
  • the liquid crystal display provided by the embodiment includes a liquid crystal panel 200 and a backlight module 100.
  • the backlight module 100 provides a display light source to the The liquid crystal panel 200 in which the liquid crystal panel 200 employs a transflective liquid crystal panel as described above.

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Abstract

一种透反式液晶面板及液晶显示器，包括相对设置的阵列基板（10）和彩膜基板（20）以及位于阵列基板（10）和彩膜基板（20）之间的液晶层（30），阵列基板（10）包括多个像素区域（40），每个像素区域（40）包括透射区（41）和反射区（42），阵列基板（10）还包括位于像素区域（40）内的多个像素电极（50），各个像素电极（50）呈弯折的条状并且彼此间隔设置；其中，位于透射区（41）中的像素电极（50）的弯折夹角为α1，位于反射区（42）中的像素电极（50）的弯折夹角为α2，并且，α1＜α2，以使透射区（41）的相位延迟量与反射区（42）的相位延迟量相匹配。

Description

透反式液晶面板以及液晶显示器 技术领域
本发明属于液晶显示技术领域，涉及一种透反式液晶面板以及包含该液晶面板的液晶显示器。
背景技术
目前，液晶显示器(Liquid Crystal Display：简称LCD)以其优异的性能与成熟的技术成为市场上的主流产品。液晶面板是液晶显示器中的关键部件，液晶面板主要由彩膜基板和阵列基板对盒而成，所述彩膜基板和阵列基板之间填充液晶而构成液晶盒。液晶面板根据光源类型可以分为透射式(transmissive)、反射式(reflective)和透反式(transflective，也称为半透射半反射式)。
其中，透射式的液晶面板主要以背光源作为光源，在液晶面板后面设置有背光源，阵列基板上的像素电极为透明电极作为透射区，有利于背光源的光线透射穿过液晶层来显示图像；反射式液晶面板主要是以前光源或者外界光源作为光源，其阵列基板采用金属或者其他具有良好反射特性材料的反射电极作为反射区，适于将前光源或者外界光源的光线反射；透反式液晶显示面板则可视为透射式与反射式液晶显示面板的结合，在阵列基板上既设置有反射区，又设置有透射区，可以同时利用背光源以及前光源或者外界光源以进行显示。
透射式液晶面板的优点是可以在暗的环境下显示明亮的图像，但缺点是能透过的光线占背光源发射光线的比例较小，背光源利用率不高，为提高显示亮度就需要大幅度提高背光源的亮度，因此能耗高。反射式液晶面板的优点是能利用外部光源，功耗相对较低，但缺点是由于对外部光源的依赖而无法在暗处显示图像。透反式液晶面板兼具透射式和反射式液晶显示面板的优点，既可以在暗的环境下显示明亮的图像，室内使用，也可以在室外使用。因此，它被广泛用于便携式移动电子产品的显示设备，如手机，数码相机，掌上电脑，GPRS等移动产品。
但是，透反式液晶面板的不足之处在于，透射区射出的光线只经过一次液晶层，而反射区射出的光线则经过两次液晶层，这样，就造成透反式液晶显示 器中不同的光源发出的光线在反射区与透射区光路(光程)不同，使得透射区与反射区的色差较大，导致透反式液晶显示器中显示的影像出现色彩不协调的情况。为了改善色彩不协调的现象，目前，透反式液晶面板通常采用双盒厚间距设计方式，即使得对应反射区的液晶盒的盒厚为对应透射区的液晶盒的盒厚的一半，以保证反射区的液晶的相位延迟量与透射区的液晶的相位延迟量相等(即，使得通过两个区域的光线的相位延迟量能够匹配)，从而保证透射区和反射区的色差较小以及色彩协调。但是这种结构的透反式液晶面板由于液晶盒存在盒厚差异，导致液晶面板的制作工艺复杂，盒厚均匀性不易控制。
发明内容
有鉴于此，本发明所要解决的技术问题是针对现有技术中透反式液晶面板存在的不足，提供一种透反式液晶面板以及包含该液晶面板的液晶显示器，该液晶面板在保证透射区和反射区的液晶盒盒厚相等的情况下，简化液晶面板的制作工艺；且能够使透射区和反射区的色差较小以及色彩协调，提高液晶显示器的显示品质。
为了实现上述目的，本发明采用了如下的技术方案：
一种透反式液晶面板，包括相对设置的阵列基板和彩膜基板以及位于所述阵列基板和彩膜基板之间的液晶层，所述阵列基板包括多个像素区域，每个所述像素区域包括透射区和反射区，其中，所述阵列基板还包括位于所述像素区域内的多个像素电极，各个像素电极呈弯折的条状并且彼此间隔设置；其中，位于所述透射区中的像素电极的弯折夹角为α1，位于所述反射区中的像素电极的弯折夹角为α2，并且，α1<α2，以使所述透射区的相位延迟量与反射区的相位延迟量相匹配。
其中，所述阵列基板上还设置有反射层，所述反射层覆盖区域为反射区，所述反射层未覆盖区域为透射区。
其中，所述阵列基板上还设置有公共电极层，所述公共电极层覆盖所述反射层，所述公共电极层上设置有一绝缘层，所述多个像素电极位于所述绝缘层上，所述公共电极层与所述多个像素电极通过所述绝缘层电性绝缘。
其中，所述透射区的光程差为所述反射区的光程差的两倍。
其中，所述液晶面板还包括第一偏振片和第二偏振片，所述第一偏振片设于所述彩膜基板远离液晶层的一侧，所述第二偏振片设于所述阵列基板远离液 晶层的一侧，所述第一偏振片的透光轴与第二偏振片的透光轴平行。
其中，所述液晶层的液晶分子的初始取向与所述偏振片的透光轴平行。
其中，所述液晶层的液晶为正性液晶。
其中，所述液晶面板中，透射区对应的部分和反射区对应的部分的厚度相等。
本发明的另一方面是提供一种液晶显示器，包括液晶面板及背光模组，所述液晶面板与所述背光模组相对设置，所述背光模组提供显示光源给所述液晶面板，其中，所述液晶面板采用如上所述的透反式液晶面板。
本发明实施例提供的透反式液晶面板，通过在透射区和反射区设置具有不同弯折夹角弯折条状像素电极，其中位于透射区中的像素电极的弯折夹角小于位于反射区中的像素电极的弯折夹角，能保证透射区和反射区的液晶的相位延迟量的匹配，因此无需改变液晶面板中液晶盒的盒厚，在液晶层厚度保持一致的情况下，可以大大简化液晶面板的制作工艺，同时也改善了液晶显示器的显示品质。
附图说明
图1是本发明实施例提供的透反式液晶面板的结构示意图
图2是本发明实施例中一个像素区域中的像素电极的结构示意图。
图3为本发明实施例中液晶层在不加电压时的俯视示意图。
图4为本发明实施例中液晶层在施加电压时的俯视示意图。
图5是本发明实施例提供的液晶显示器的结构示意图。
具体实施方式
为使本领域技术人员更好地理解本发明的技术方案，下面结合附图和具体实施方式对本发明的透反式液晶面板以及液晶显示器作进一步详细描述。
参阅图2和图3，本实施例提供的透反式液晶面板，包括相对设置的阵列基板10和彩膜基板20以及位于所述阵列基板10和彩膜基板20之间的液晶层30，所述阵列基板10包括多个像素区域40，每个所述像素区域40包括透射区41和反射区42。其中，所述阵列基板10还包括位于所述像素区域40内的多个像素电极50，各个像素电极50呈弯折的条状并且彼此间隔设置。进一步地，位于所 述透射区41中的像素电极50的弯折夹角为α1，位于所述反射区42中的像素电极50的弯折夹角为α2，并且，α1<α2，以使所述透射区41的相位延迟量与反射区42的相位延迟量相匹配。
具体地，如图1所示，所述阵列基板10上还设置有反射层60，所述反射层60覆盖区域为反射区42，所述反射层60未覆盖区域为透射区42。进一步地，所述阵列基板10上还设置有公共电极层70，所述公共电极层70覆盖所述反射层60，所述公共电极层70上设置有一绝缘层80，所述多个像素电极50位于所述绝缘层80上，所述公共电极层70与所述多个像素电极50通过所述绝缘层80电性绝缘。进一步地，所述液晶面板还包括第一偏振片91和第二偏振片92，所述第一偏振片91设于所述彩膜基板20远离液晶层30的一侧，所述第二偏振片92设于所述阵列基板10远离液晶层30的一侧，所述第一偏振片91的透光轴与第二偏振片92的透光轴平行(如图2中的X方向)。
本实施例中，所述液晶层30中的液晶采用正性液晶。图3为本实施例中液晶层在不加电压时的俯视示意图。如图3所示，本实施例中，所述液晶层30中的液晶分子的初始取向与所述偏振片91、92的透光轴平行。
为了保证液晶面板中透射区与反射区之间的相位延迟差相匹配，需要在透射区和反射区设置具有不同弯折夹角弯折条状像素电极。如图2所示的，位于所述透射区41中的像素电极50的弯折夹角为α1，位于所述反射区42中的像素电极50的弯折夹角为α2，其中，α1<α2。或者说，位于透射区中的像素电极的倾斜角度大于位于反射区中的像素电极的倾斜角度。在此，像素电极的倾斜角度是指像素电极与垂直于偏振片91、92的透光轴的方向(如图2中的Y方向)的夹角。如图2所示的，位于所述透射区41中的像素电极50的倾斜角度为β1，位于所述反射区42中的像素电极50的倾斜角度为β2，其中，β1>β2。
图4为本实施例中液晶层在施加电压时的俯视示意图。在向像素电极50施加电压时，在透射区41，由于像素电极50的倾斜角度较大，能够产生倾斜角度较大的电场，液晶分子在电场的作用下会产生较大程度的偏转角度β1，经过透射区41的光线会产生较大的水平相位延迟量。在反射区42，由于像素电极50的倾斜角度较小，能够产生倾斜角度较小的电场，液晶分子在电场的作用下会产生较小程度的偏转角度β2，经过反射区42的光线会产生较小的水平相位延迟量。因此，我们通过对像素电极50的倾斜角度的优化，使得经过透射区41的光线会产生比反射区42更多的的光程差，大概为透射区41的光程差为反射区 42的光程差的两倍，而反射区42的光线因为反射的缘故相当于两次经过液晶层30，所以就可以实现透射区和反射区的相位延迟量的匹配，并最终达到半透半反的显示效果。
在实际的制备工艺中，对于透射区41和反射区42的像素电极50的倾斜角度的优化，可以采用实验测试的方法来找到优化角度。两者的倾斜角度关系的确定与液晶的性质(如：双折射率性质，介电各向异性性质，介电常数等)相关。具体可以按照以下测试方法针对包含特定一种液晶面板，确定两者的倾斜角度关系：
首先，按照预先设定的几个倾斜角度比值制造不同的测试面板，并且，这些测试面板中均填充上述特定的一种液晶。其次，绘制这几个测试面板的透射区和反射区的V-T(电压-透过率)曲线特性，若一测试面板的透射区和反射区的曲线特性在误差范围内一致，则说明透射区的相位延迟大致为反射区的相位延迟的2倍，那么该测试面板的透射区和反射区的像素电极的倾斜角度可以作为实际生产中的参考值。在本发明实施例中对上述比值不加限定，而以实际生产中能够使得同一个像素区域的透射区、反射区的光线通过所述液晶层所产生的相位延迟量相同为准。
本实施例中，所述液晶层30中对应所述反射区42的部分的厚度和对应透射区41的部分的厚度相等，即该液晶面板为单盒厚透反式液晶面板。由于所述液晶面板中的液晶盒的盒厚均匀，在液晶层厚度保持一致的情况下，可以大大简化液晶面板的制作工艺，同时也改善了透反式液晶显示器的显示品质。
本实施例还提供了一种液晶显示器，如图5所示，本实施例提供的液晶显示器包括相对设置的液晶面板200以及背光模组100，由所述背光模组100提供显示光源给所述液晶面板200，其中，液晶面板200采用了如上所述的透反式液晶面板。
需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包 括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
以上所述仅是本申请的具体实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本申请原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本申请的保护范围。

Claims (20)

  1. 一种透反式液晶面板，包括相对设置的阵列基板和彩膜基板以及位于所述阵列基板和彩膜基板之间的液晶层，所述阵列基板包括多个像素区域，每个所述像素区域包括透射区和反射区，其中，所述阵列基板还包括位于所述像素区域内的多个像素电极，各个像素电极呈弯折的条状并且彼此间隔设置；其中，位于所述透射区中的像素电极的弯折夹角为α1，位于所述反射区中的像素电极的弯折夹角为α2，并且，α1<α2，以使所述透射区的相位延迟量与反射区的相位延迟量相匹配。
  2. 根据权利要求1所述的透反式液晶面板，其中，所述阵列基板上还设置有反射层，所述反射层覆盖区域为反射区，所述反射层未覆盖区域为透射区。
  3. 根据权利要求2所述的透反式液晶面板，其中，所述阵列基板上还设置有公共电极层，所述公共电极层覆盖所述反射层，所述公共电极层上设置有一绝缘层，所述多个像素电极位于所述绝缘层上，所述公共电极层与所述多个像素电极通过所述绝缘层电性绝缘。
  4. 根据权利要求3所述的透反式液晶面板，其中，所述透射区的光程差为所述反射区的光程差的两倍。
  5. 根据权利要求1所述的透反式液晶面板，其中，所述液晶面板还包括第一偏振片和第二偏振片，所述第一偏振片设于所述彩膜基板远离液晶层的一侧，所述第二偏振片设于所述阵列基板远离液晶层的一侧，所述第一偏振片的透光轴与第二偏振片的透光轴平行。
  6. 根据权利要求2所述的透反式液晶面板，其中，所述液晶面板还包括第一偏振片和第二偏振片，所述第一偏振片设于所述彩膜基板远离液晶层的一侧，所述第二偏振片设于所述阵列基板远离液晶层的一侧，所述第一偏振片的透光轴与第二偏振片的透光轴平行。
  7. 根据权利要求5所述的透反式液晶面板，其中，所述液晶层的液晶分子的初始取向与所述偏振片的透光轴平行。
  8. 根据权利要求5所述的透反式液晶面板，其中，所述液晶层的液晶为正性液晶。
  9. 根据权利要求1所述的透反式液晶面板，其中，所述液晶面板中，透射区对应的部分和反射区对应的部分的厚度相等。
  10. 根据权利要求5所述的透反式液晶面板，其中，所述液晶面板中，透射区对应的部分和反射区对应的部分的厚度相等。
  11. 一种液晶显示器，包括液晶面板及背光模组，所述液晶面板与所述背光模组相对设置，所述背光模组提供显示光源给所述液晶面板，其中，所述液晶面板为透反式液晶面板，该透反式液晶面板包括相对设置的阵列基板和彩膜基板以及位于所述阵列基板和彩膜基板之间的液晶层，所述阵列基板包括多个像素区域，每个所述像素区域包括透射区和反射区，其中，所述阵列基板还包括位于所述像素区域内的多个像素电极，各个像素电极呈弯折的条状并且彼此间隔设置；其中，位于所述透射区中的像素电极的弯折夹角为α1，位于所述反射区中的像素电极的弯折夹角为α2，并且，α1<α2，以使所述透射区的相位延迟量与反射区的相位延迟量相匹配。
  12. 根据权利要求11所述的液晶显示器，其中，所述阵列基板上还设置有反射层，所述反射层覆盖区域为反射区，所述反射层未覆盖区域为透射区。
  13. 根据权利要求12所述的液晶显示器，其中，所述阵列基板上还设置有公共电极层，所述公共电极层覆盖所述反射层，所述公共电极层上设置有一绝缘层，所述多个像素电极位于所述绝缘层上，所述公共电极层与所述多个像素电极通过所述绝缘层电性绝缘。
  14. 根据权利要求13所述的液晶显示器，其中，所述透射区的光程差为所述反射区的光程差的两倍。
  15. 根据权利要求11所述的液晶显示器，其中，所述液晶面板还包括第一偏振片和第二偏振片，所述第一偏振片设于所述彩膜基板远离液晶层的一侧，所述第二偏振片设于所述阵列基板远离液晶层的一侧，所述第一偏振片的透光轴与第二偏振片的透光轴平行。
  16. 根据权利要求12所述的液晶显示器，其中，所述液晶面板还包括第一偏振片和第二偏振片，所述第一偏振片设于所述彩膜基板远离液晶层的一侧，所述第二偏振片设于所述阵列基板远离液晶层的一侧，所述第一偏振片的透光轴与第二偏振片的透光轴平行。
  17. 根据权利要求15所述的液晶显示器，其中，所述液晶层的液晶分子的初始取向与所述偏振片的透光轴平行。
  18. 根据权利要求15所述的液晶显示器，其中，所述液晶层的液晶为正性液晶。
  19. 根据权利要求11所述的液晶显示器，其中，所述液晶面板中，透射区对应的部分和反射区对应的部分的厚度相等。
  20. 根据权利要求15所述的液晶显示器，其中，所述液晶面板中，透射区对应的部分和反射区对应的部分的厚度相等。
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CN106950760A (zh) * 2017-05-12 2017-07-14 京东方科技集团股份有限公司 一种显示面板和显示装置
CN107121828A (zh) * 2017-06-19 2017-09-01 合肥市惠科精密模具有限公司 一种液晶显示模组
CN108205216A (zh) * 2018-01-19 2018-06-26 精电(河源)显示技术有限公司 一种高透光液晶显示屏
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