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US20170261775A1 - Display device, operating method of display device, and pixel circuit of display device - Google Patents

Display device, operating method of display device, and pixel circuit of display device Download PDF

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Publication number
US20170261775A1
US20170261775A1 US15/280,033 US201615280033A US2017261775A1 US 20170261775 A1 US20170261775 A1 US 20170261775A1 US 201615280033 A US201615280033 A US 201615280033A US 2017261775 A1 US2017261775 A1 US 2017261775A1
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United States
Prior art keywords
electric field
liquid crystal
electrode
coupled
display medium
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US15/280,033
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English (en)
Inventor
Fang-Cheng Yu
Tzu-Yi TSAO
Pu-Jung Huang
Cheng-Yeh Tsai
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AUO Corp
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AU Optronics Corp
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Application filed by AU Optronics Corp filed Critical AU Optronics Corp
Assigned to AU OPTRONICS CORPORATION reassignment AU OPTRONICS CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: YU, FANG-CHENG, TSAO, TZU-YI, HUANG, PU-JUNG, TSAI, CHENG-YEH
Publication of US20170261775A1 publication Critical patent/US20170261775A1/en
Priority to US16/567,380 priority Critical patent/US10768499B2/en
Abandoned legal-status Critical Current

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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
    • G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • 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
    • 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
    • G02F1/133621—Illuminating devices providing coloured light
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136286—Wiring, e.g. gate line, drain line
    • 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
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • 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
    • G02F1/133621—Illuminating devices providing coloured light
    • G02F1/133622—Colour sequential illumination
    • G02F2001/133622—
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/12—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode
    • G02F2201/121—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode common or background
    • 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
    • G02F2203/04—Function characteristic wavelength independent

Definitions

  • the present disclosure relates to a device, a method, and a circuit.
  • the present disclosure relates to a display device, an operating method of a display device, and a pixel circuit of a display device.
  • a liquid crystal display device is provided with liquid crystal units and two polarizers vertical to each other.
  • the liquid crystal display device may apply a bias to the liquid crystal units, to enable light to selectively pass through the polarizers through the effect of the liquid crystal units, for displaying.
  • different liquid crystal materials have different properties. Therefore, how to make use of a variety of liquid crystal materials for controlling light to pass through the polarizers is an important issue in the art.
  • a display device includes: a first substrate, a second substrate, a first liquid crystal display medium, and a first electric field applying component.
  • the first liquid crystal display medium is disposed between the first substrate and the second substrate.
  • the first electric field applying component is disposed on the second substrate and is configured to apply a first electric field to a first portion of the first liquid crystal display medium, and to apply a second electric field to a second portion of the first liquid crystal display medium, wherein the first electric field and the second electric field are parallel to the first substrate, and the intensity of the first electric field is operatively different from that of the second electric field.
  • the operating method of a display device includes: applying a first electric field to a first portion of a first liquid crystal display medium, wherein the first liquid crystal display medium is disposed between a first substrate and a second substrate; and applying a second electric field to a second portion of the first liquid crystal display medium.
  • the first electric field and the second electric field are parallel to the first substrate, and the intensity of the first electric field is operatively different from that of the second electric field.
  • the pixel circuit includes a first liquid crystal component, a second liquid crystal component, a first storage capacitor, a second storage capacitor, a first switch, and a second switch.
  • the first liquid crystal component is coupled between a first end of a first capacitor and a common electrode.
  • the second liquid crystal component is coupled between a second end of the first capacitor and the common electrode.
  • the first storage capacitor is coupled in parallel to the first liquid crystal component.
  • the second storage capacitor is coupled in parallel to the second liquid crystal component.
  • the first switch is coupled between the first storage capacitor and a first data line, for providing a first data voltage to the first storage capacitor.
  • the second switch is coupled between the second storage capacitor and a second data line, for providing a second data voltage to the second storage capacitor.
  • the pixel circuit includes a first liquid crystal component, a second liquid crystal component, a first storage capacitor, a second storage capacitor, a first switch, a second switch, and a third switch.
  • the first liquid crystal component is coupled between a first end of a first capacitor and a first end of a second capacitor.
  • the second liquid crystal component is coupled between a second end of the first capacitor and a second end of the second capacitor.
  • the first storage capacitor is coupled in parallel to the first liquid crystal component.
  • the second storage capacitor is coupled in parallel to the second liquid crystal component.
  • the first switch is coupled between the first storage capacitor and a first data line, for providing a first data voltage to the first storage capacitor.
  • the second switch is coupled between a first end of the second storage capacitor and a second data line, for providing a second data voltage to the first end of the second storage capacitor.
  • the third switch is coupled between a second end of the second storage capacitor and a third data line, for providing a third data voltage to the second end of the second storage capacitor.
  • the pixel circuit includes a first liquid crystal component, a second liquid crystal component, a first storage capacitor, a second storage capacitor, a first switch, and a second switch.
  • the first liquid crystal component has a first end and a second end, wherein the first end of the first liquid crystal component is coupled to a first end of a first capacitor.
  • the second liquid crystal component has a first end and a second end, wherein the first end of the second liquid crystal component is coupled to a second end of the first capacitor, and the second end of the second liquid crystal component is coupled to the second end of the first liquid crystal component.
  • the first storage capacitor is coupled in parallel to the first liquid crystal component.
  • the second storage capacitor is coupled in parallel to the second liquid crystal component.
  • the first switch is coupled between the second end of the first liquid crystal component and a first data line, for providing a first data voltage to the second end of the first liquid crystal component.
  • the second switch is coupled between the first end of the first liquid crystal component and a second data line, for providing a second data voltage to the first end of the first liquid crystal component.
  • FIG. 1 is a schematic view of a display device according to one embodiment of the present disclosure
  • FIG. 2A is a schematic view of a light transmittance according to one comparative example of the present disclosure
  • FIG. 2B is a schematic view of a light transmittance according to one comparative example of the present disclosure
  • FIG. 3 is a schematic view of a display device according to one embodiment of the present disclosure.
  • FIG. 4 is a schematic view of a display device according to one embodiment of the present disclosure.
  • FIG. 5 is a circuit diagram of a pixel circuit of a display device according to one embodiment of the present disclosure.
  • FIG. 6 is a circuit diagram of a pixel circuit of a display device according to one embodiment of the present disclosure.
  • FIG. 7 is a circuit diagram of a pixel circuit of a display device according to one embodiment of the present disclosure.
  • FIG. 8 is a flow chart of an operating method of a display device according to one embodiment of the present disclosure.
  • FIG. 9 is a flow chart of an operating method of a display device according to one embodiment of the present disclosure.
  • FIG. 10 is a flow chart of an operating method of a display device according to one embodiment of the present disclosure.
  • electrically coupled used herein may mean that two or more elements are in a direct physical or electrical contact or in an indirect physical or electrical contact, and the term “electrically coupled” may also mean that two or more elements co-operate or interact.
  • words indicating direction such as “above,” “below,” “left,” “right,” “front” and “back,” are directions as they relate to the accompanying drawings. Therefore, such words indicating direction are used for illustration and are not intended to limit the present disclosure.
  • FIG. 1 is a schematic view of a display device 100 according to one embodiment of the present disclosure.
  • the display device 100 includes a first substrate SUB 1 , a second substrate SUB 2 , a liquid crystal display medium LC 1 , LC 2 , and an electric field applying component ET 1 -ET 4 , PL 1 , PL 2 .
  • the liquid crystal display medium LC 1 , LC 2 is disposed between the first substrate SUB 1 and the second substrate SUB 2 .
  • the liquid crystal display medium LC 1 , LC 2 may be implemented by blue-phase liquid crystal.
  • the electric field applying component ET 1 -ET 4 , PL 1 , PL 2 is disposed on the second substrate SUB 2 .
  • the electric field applying component ET 1 -ET 4 , PL 1 , PL 2 includes electrodes ET 1 -ET 4 and electrode posts PL 1 and PL 2 .
  • the electrode posts PL 1 and PL 2 are respectively disposed at two opposite sides of the liquid crystal display medium LC 1 , LC 2 .
  • the electrodes ET 1 and ET 2 are respectively disposed at two opposite ends of the electrode post PL 1
  • the electrodes ET 3 and ET 4 are respectively disposed at two opposite ends of the electrode post PL 2 .
  • the electric field applying component ET 1 -ET 4 , PL 1 , PL 2 is configured to apply a first electric field to a first portion LC 1 of the liquid crystal display medium and to apply a second electric field to a second portion LC 2 of the liquid crystal display medium.
  • the display device 100 may provide a first voltage difference V 1 between the electrode ET 1 and the electrode ET 3 , to apply the first electric field to the first portion LC 1 of the liquid crystal display medium.
  • the display device 100 may provide a second voltage difference V 2 between the electrode ET 2 and the electrode ET 4 , to apply the second electric field to the second portion LC 2 of the liquid crystal display medium.
  • the first electric field and the second electric field are both generally parallel to the first substrate SUB 1 and the second substrate SUB 2 .
  • the intensity of the first electric field is operatively the same as or different from that of the second electric field, i.e., the first voltage difference V 1 is operatively the same as or different from the second voltage difference V 2 .
  • the two electric fields are taken as an example herein, other numbers of electric fields also fall within the scope of the present disclosure.
  • lights of different colors have different transmittances with respect to the same liquid crystal display medium under the same voltage, wherein a curve CV 1 for example represents a blue light, a curve CV 2 for example represents a green light, and a curve CV 3 for example represents a red light.
  • a curve CV 1 for example represents a blue light
  • a curve CV 2 for example represents a green light
  • a curve CV 3 for example represents a red light.
  • the lights of different colors are made to have generally the same transmittance with respect to the same liquid crystal display medium, wherein a curve CV 4 for example represents a blue light transmittance when an intensity ratio of the first electric field to the second electric field is 36/28, a curve CV 5 for example represents a green light transmittance when the intensity ratio of the first electric field to the second electric field is 36/36, and a curve CV 6 for example represents a red light transmittance when the intensity ratio of the first electric field to the second electric field is 36/42.
  • a curve CV 4 for example represents a blue light transmittance when an intensity ratio of the first electric field to the second electric field is 36/28
  • a curve CV 5 for example represents a green light transmittance when the intensity ratio of the first electric field to the second electric field is 36/36
  • a curve CV 6 for example represents a red light transmittance when the intensity ratio of the first electric field to the second electric field is 36/42.
  • a display device 100 A in addition to the aforementioned components of the display device 100 , further includes a first backlight source BL 1 , a second backlight source BL 2 , and a third backlight source BL 3 .
  • the first backlight source BL 1 is a blue backlight source
  • the second backlight source BL 2 is a green backlight source
  • the third backlight source BL 3 is a red backlight source. It should be noted that, the number and form of the aforementioned backlight sources are exemplary only, and other numbers and forms of the backlight sources also fall within the scope of the present disclosure.
  • the first backlight source BL 1 , the second backlight source BL 2 , and the third backlight source BL 3 are configured to provide lights of different colors to the liquid crystal display medium LC 1 , LC 2 respectively.
  • the display device 100 is configured to generate the aforementioned first electric field and second electric field through the electric field applying component, for controlling the light transmittance of the liquid crystal display medium LC 1 , LC 2 .
  • different backlight sources provide lights of different colors to the liquid crystal display medium LC 1 , LC 2 , and the electric field applying component ET 1 -ET 4 , PL 1 , PL 2 generate the first electric field and the second electric field that are the same as or different from each other.
  • gray scale data of the blue light, the green light, and the red light are 128, 128, and 128 respectively.
  • the first backlight source BL 1 is configured to provide the blue light to the liquid crystal display medium LC 1 , LC 2 .
  • the second backlight source BL 2 and the third backlight source BL 3 are nonluminous.
  • the first electric field and the second electric field provided by the electric field applying component ET 1 -ET 4 , PL 1 , PL 2 have different electric field intensities.
  • the intensity ratio of the first electric field to the second electric field is 36:28.
  • the electric field applying component ET 1 -ET 4 , PL 1 , PL 2 may for example enable the electrode ET 1 and the electrode ET 3 to have a voltage difference of 3.6 V, and enable the electrode ET 2 and the electrode ET 4 to have a voltage difference of 2.8 V.
  • the second backlight source BL 2 is configured to provide the green light to the liquid crystal display medium LC 1 , LC 2 .
  • the first backlight source BL 1 and the third backlight source BL 3 are nonluminous.
  • the first electric field and the second electric field provided by the electric field applying component ET 1 -ET 4 , PL 1 , PL 2 have a same intensity.
  • the electric field applying component ET 1 -ET 4 , PL 1 , PL 2 may for example enable the electrode ET 1 and the electrode ET 3 to have a voltage difference of 3.6 V, and enable the electrode ET 2 and the electrode ET 4 to also have a voltage difference of 3.6 V.
  • the third backlight source BL 3 is configured to provide the red light to the liquid crystal display medium LC 1 , LC 2 .
  • the first backlight source BL 1 and the second backlight source BL 2 are nonluminous.
  • the first electric field and the second electric field provided by the electric field applying component ET 1 -ET 4 , PL 1 , PL 2 have different intensities.
  • the intensity ratio of the first electric field to the second electric field is 36:42.
  • the electric field applying component ET 1 -ET 4 , PL 1 , PL 2 may for example enable the electrode ET 1 and the electrode ET 3 to have a voltage difference of 3.6 V, and enable the electrode ET 2 and the electrode ET 4 to have a voltage difference of 4.2 V.
  • voltage/transmittance curves also referred to as gamma curves
  • the complexity in controlling the light to pass through the liquid crystal display medium may be decreased, and the generation of the color shift under a high voltage may be avoided.
  • the intensity ratio of the first electric field to the second electric field in the second sub-frame may be between the intensity ratio of the first electric field to the second electric field in the first sub-frame and the intensity ratio of the first electric field to the second electric field in the third sub-frame.
  • the intensities of the first electric field and the second electric field in the second sub-frame may be different from each another, and thus the present disclosure is not limited to the embodiment where the intensities of the first electric field and the second electric field in the second sub-frame are the same as each another.
  • the display device 100 B includes a first substrate SUB 1 , a second substrate SUB 2 , a first liquid crystal display medium LC 11 , LC 12 , a second liquid crystal display medium LC 21 , LC 22 , a third liquid crystal display medium LC 31 , LC 32 , a first electric field applying component ET 11 -ET 14 , PL 11 , PL 12 , a second electric field applying component ET 21 -ET 24 , PL 21 , PL 22 , a third electric field applying component ET 31 -ET 34 , PL 31 , PL 32 , a first color filter CF 1 , a second color filter CF 2 , a third color filter CF 3 , and a backlight source BL.
  • the first color filter CF 1 is for example a blue filter
  • the second color filter CF 2 is for example a green filter
  • the third color filter CF 3 is for example a red filter.
  • the first liquid crystal display medium LC 11 , LC 12 , the first electric field applying component ET 11 -ET 14 , PL 11 , PL 12 , and the first color filter CF 1 may be defined as a first sub-pixel PX 1
  • the second liquid crystal display medium LC 21 , LC 22 , the second electric field applying component ET 21 -ET 24 , PL 21 , PL 22 , and the second color filter CF 2 may be defined as a second sub-pixel PX 2
  • the third liquid crystal display medium LC 31 , LC 32 , the third electric field applying component ET 31 -ET 34 , PL 31 , PL 32 , and the third color filter CF 3 may be defined as a third sub-pixel PX 3 .
  • the backlight source BL is configured to provide a white light to the first liquid crystal display medium LC 11 , LC 12 , the second liquid crystal display medium LC 21 , LC 22 , and the third liquid crystal display medium LC 31 , LC 32 .
  • the white light operatively passes through the first liquid crystal display medium LC 11 , LC 12 , the second liquid crystal display medium LC 21 , LC 22 , and the third liquid crystal display medium LC 31 , LC 32 , and is filtered by the first color filter CF 1 , the second color filter CF 2 , and the third color filter CF 3 respectively into lights of different colors.
  • the first electric field applying component ET 11 -ET 14 , PL 11 , PL 12 , the second electric field applying component ET 21 -ET 24 , PL 21 , PL 22 , and the third electric field applying component ET 31 -ET 34 , PL 31 , PL 32 are disposed on the second substrate SUB 2 .
  • the first electric field applying component ET 11 -ET 14 , PL 11 , PL 12 includes electrodes ET 11 -ET 14 and electrode posts PL 11 and PL 12 .
  • the electrode posts PL 11 and PL 12 are respectively disposed at two opposite sides of the liquid crystal display medium LC 11 , LC 12 .
  • the electrodes ET 11 and ET 12 are respectively disposed at two opposite ends of the electrode post PL 11
  • the electrodes ET 13 and ET 14 are respectively disposed at two opposite ends of the electrode post PL 12 .
  • the second electric field applying component ET 21 -ET 24 , PL 21 , PL 22 includes electrodes ET 21 -ET 24 and electrode posts PL 21 and PL 22 .
  • the electrode posts PL 21 and PL 22 are respectively disposed at two opposite sides of the liquid crystal display medium LC 21 , LC 22 .
  • the electrodes ET 21 and ET 22 are respectively disposed at two opposite ends of the electrode post PL 21
  • the electrodes ET 23 and ET 24 are respectively disposed at two opposite ends of the electrode post PL 22 .
  • the third electric field applying component ET 31 -ET 34 , PL 31 , PL 32 includes electrodes ET 31 -ET 34 and electrode posts PL 31 and PL 32 .
  • the electrode posts PL 31 and PL 32 are respectively disposed at two opposite sides of the liquid crystal display medium LC 31 , LC 32 .
  • the electrode ET 31 and ET 32 are respectively disposed at two opposite ends of the electrode post PL 31
  • the electrodes ET 33 and ET 34 are respectively disposed at two opposite ends of the electrode post PL 32 .
  • a first voltage difference is provided between the electrode ET 11 and the electrode ET 13 , for applying a first electric field to the liquid crystal display medium LC 11
  • a second voltage difference is provided between the electrode ET 12 and the electrode ET 14 , for applying a second electric field to the liquid crystal display medium LC 12
  • a third voltage difference is provided between the electrode ET 21 and the electrode ET 23 , for applying a third electric field to the liquid crystal display medium LC 21
  • a fourth voltage difference is provided between the electrode ET 22 and the electrode ET 24 , for applying a fourth electric field to the liquid crystal display medium LC 22
  • a fifth voltage difference is provided between the electrode ET 31 and the electrode ET 33 , for applying a fifth electric field to a liquid crystal display medium LC 31
  • a sixth voltage difference is provided between the electrode ET 32 and the electrode ET 34 , for applying a sixth electric field to the liquid crystal display medium LC 32 .
  • the first electric field to the sixth electric field are all generally parallel to the first substrate SUB 1 and the second substrate SUB 2 .
  • the intensity of the first electric field is operatively different from that of the second electric field, and the first voltage difference is operatively different from the second voltage difference.
  • the intensity of the third electric field is operatively different from that of the fourth electric field, and the third voltage difference is operatively different from the fourth voltage difference.
  • the intensity of the fifth electric field is operatively different from that of the sixth electric field, and the fifth voltage difference is operatively different from the sixth voltage difference.
  • the intensity ratio of the first electric field to the second electric field, the intensity ratio of the third electric field to the fourth electric field, and the intensity ratio of the fifth electric field to the sixth electric field are different from one another.
  • the intensity ratio of the third electric field to the fourth electric field is between the intensity ratio of the first electric field to the second electric field and the intensity ratio of the fifth electric field to the sixth electric field.
  • the first electric field applying component ET 11 -ET 14 , PL 11 , PL 12 for example can enable the electrode ET 11 and the electrode ET 13 to have a voltage difference of 3.6 V, and enable the electrode ET 12 and the electrode ET 14 to have a voltage difference of 2.8 V
  • the second electric field applying component ET 21 -ET 24 , PL 21 , PL 22 for example can enable the electrode ET 21 and the electrode ET 23 to have a voltage difference of 3.6 V
  • the third electric field applying component ET 31 -ET 34 , PL 31 , PL 32 for example can enable the electrode ET 31 and the electrode ET 33 to have a voltage difference of 3.6 V, and enable the electrode ET 32 and the electrode ET 34 to have a voltage difference of 4.2 V.
  • voltage/transmittance curves also referred to as gamma curves
  • lights of different colors including blue, green, and red
  • gamma curves voltage/transmittance curves of lights of different colors (including blue, green, and red) are generally superposed with each other (referring to FIG. 2B ).
  • the complexity in controlling the light to pass through the liquid crystal display medium may be decreased, and the generation of the color shift under a high voltage may be avoided.
  • the intensity of the third electric field may be different from that of the fourth electric field, and thus the present disclosure is not limited to the embodiment where the intensity of the above third electric field is the same as that of the fourth electric field.
  • the display device 100 may provide a data voltage VDATA 1 to the electrode ET 1 , provide a data voltage VDATA 2 to the electrode ET 2 , and provide a common voltage VCOM to the electrodes ET 3 and ET 4 , thus enabling the electrodes ET 3 and ET 4 to become a common electrode.
  • the display device 100 has an equivalent pixel circuit PC 1 , wherein the capacitor of the electrode post PL 1 is represented as a capacitor CWALL, and the liquid crystal display medium LC 1 , LC 2 is respectively represented as liquid crystal components CLC 1 , CLC 2 .
  • the liquid crystal component CLC 1 is coupled between a first end of the capacitor CWALL and the common electrode having the common voltage VCOM.
  • the liquid crystal component CLC 2 is coupled between a second end of the capacitor CWALL and the common electrode having the common voltage VCOM.
  • a storage capacitor CST 1 is coupled in parallel to the liquid crystal component CLC 1 .
  • a storage capacitor CST 2 is coupled in parallel to the liquid crystal component CLC 2 .
  • a switch SW 1 is coupled between the storage capacitor CST 1 and a first data line, for providing the data voltage VDATA 1 to the storage capacitor CST 1 .
  • a switch SW 2 is coupled between the storage capacitor CST 2 and a second data line, for providing the data voltage VDATA 2 to the storage capacitor CST 2 .
  • Gate ends of the gate switches SW 1 and SW 2 are coupled to a gate line, for receiving a scan signal VGT.
  • the data voltages VDATA 1 -VDATA 2 and the common voltage VCOM can be used to apply the electric fields of different intensities to different portions of the liquid crystal display medium LC 1 , LC 2 .
  • the liquid crystal display medium LC 1 , LC 2 can allow more refined operations thereof.
  • the display device 100 may provide a data voltage VDATA 1 to the electrode ET 1 , provide a data voltage VDATA 2 to the electrode ET 2 , provide a data voltage VDATA 3 to the electrode ET 4 , and provide a common voltage VCOM to the electrode ET 3 .
  • the display device 100 has an equivalent pixel circuit PC 2 , wherein the capacitor of the electrode post PL 1 is represented as a capacitor CWALL 1 , the capacitor of the electrode post PL 2 is represented as a capacitor CWALL 2 , and the liquid crystal display medium LC 1 , LC 2 is respectively represented as liquid crystal components CLC 1 , CLC 2 .
  • the liquid crystal component CLC 1 is coupled between a first end of the capacitor CWALL 1 and a first end of the capacitor CWALL 2 .
  • the liquid crystal component CLC 2 is coupled between a second end of the capacitor CWALL 1 and a second end of the capacitor CWALL 2 .
  • a storage capacitor CST 1 is coupled in parallel to the liquid crystal component CLC 1 .
  • a storage capacitor CST 2 is coupled in parallel to the liquid crystal component CLC 2 .
  • a switch SW 1 is coupled between the storage capacitor CST 1 and a first data line, for providing the data voltage VDATA 1 to the storage capacitor CST 1 .
  • a switch SW 2 is coupled between a first end of the storage capacitor CST 2 and a second data line, for providing the data voltage VDATA 2 to the first end of the storage capacitor CST 2 .
  • a switch SW 3 is coupled between a second end of the storage capacitor CST 2 and a third data line, for providing the data voltage VDATA 3 to the second end of the storage capacitor CST 2 .
  • the common electrode having the common voltage VCOM is electrically connected to the first end of the capacitor CWALL 2 .
  • Gate ends of the gate switches SW 1 , SW 2 , and SW 3 are coupled to a gate line, for receiving a scan signal VGT.
  • the data voltages VDATA 1 -VDATA 3 and the common voltage VCOM can be used to apply the electric fields of different intensities to different portions of the liquid crystal display medium LC 1 , LC 2 .
  • the liquid crystal display medium LC 1 , LC 2 can allow more refined operations thereof.
  • the display device 100 may provide a data voltage VDATA 1 to the electrodes ET 1 and ET 2 , provide a data voltage VDATA 2 to the electrode ET 3 , and provide a common voltage VCOM to the electrode ET 4 .
  • the display device 100 has an equivalent pixel circuit PC 3 , wherein the capacitor of the electrode post PL 2 is represented as a capacitor CWALL, and the liquid crystal display medium LC 1 , LC 2 is respectively represented as liquid crystal components CLC 1 , CLC 2 .
  • a first end of the liquid crystal component CLC 1 is coupled to a first end of the capacitor CWALL.
  • a first end of the liquid crystal component CLC 2 is coupled to a second end of the capacitor CWALL and the common electrode having the common voltage VCOM.
  • a second end of the liquid crystal component CLC 2 is coupled to a second end of the liquid crystal component CLC 1 .
  • a storage capacitor CST 1 is coupled in parallel to the liquid crystal component CLC 1 .
  • a storage capacitor CST 2 is coupled in parallel to the liquid crystal component CLC 2 .
  • a switch SW 1 is coupled between the second end of the liquid crystal component CLC 1 and a first data line, for providing the data voltage VDATA 1 to the second end of the liquid crystal component CLC 1 .
  • a switch SW 2 is coupled between the first end of the liquid crystal component CLC 1 and a second data line, for providing the data voltage VDATA 2 to the first end of the liquid crystal component CLC 1 .
  • Gate ends of the gate switches SW 1 and SW 2 are coupled to a gate line, for receiving a scan signal VGT.
  • the data voltages VDATA 1 -VDATA 2 and the common voltage VCOM can be used to apply the electric fields of different intensities to different portions of the liquid crystal display medium LC 1 , LC 2 .
  • the liquid crystal display medium LC 1 , LC 2 can allow more refined operations thereof.
  • FIG. 8 is a flow chart of an operating method 200 of a display device according to one embodiment of the present disclosure.
  • the operating method 200 of a display device can be applied to a display device having a structure the same as or similar to that in FIG. 1 .
  • the display device 100 in FIG. 1 is taken as an example below to describe the operating method 200 of a display device according to one embodiment of the present disclosure, but the present disclosure is not limited thereto.
  • these steps can also be adaptively added, replaced, and/or omitted.
  • the operating method 200 of a display device includes the following steps.
  • Step S 1 the electric field applying component applies a first electric field to the liquid crystal display medium LC 1 .
  • Step S 2 the electric field applying component applies a second electric field to the liquid crystal display medium LC 2 , wherein the first electric field and the second electric field are parallel to the first substrate SUB 1 , and the intensity of the first electric field is operatively different from that of the second electric field.
  • liquid crystal display medium LC 1 , LC 2 can allow more refined operations thereof, improving the displaying quality of the display device 100 .
  • FIG. 9 is a flow chart of an operating method 200 A of a display device according to one embodiment of the present disclosure.
  • the operating method 200 A of a display device can be applied to a display device having a structure the same as or similar to that in FIG. 3 .
  • the display device 100 A in FIG. 3 is taken as an example below to describe the operating method 200 A of a display device according to one embodiment of the present disclosure, but the present disclosure is not limited thereto.
  • these steps can also be adaptively added, replaced, and/or omitted.
  • the operating method 200 A of a display device includes the following steps.
  • Step T 1 in a first sub-frame, the first backlight source BL 1 is configured to provide a first-color light to the liquid crystal display medium LC 1 , LC 2 .
  • Step T 2 in the first sub-frame, the electric field applying component ET 1 -ET 4 , PL 1 , PL 2 applies a first electric field to the liquid crystal display medium LC 1 .
  • Step T 3 in the first sub-frame, the electric field applying component ET 1 -ET 4 , PL 1 , PL 2 applies a second electric field that is different from the first electric field to the liquid crystal display medium LC 2 .
  • Step T 4 in a second sub-frame, the second backlight source BL 2 is configured to provide a second-color light that is different from the first-color light to the liquid crystal display medium LC 1 , LC 2 .
  • Step T 5 in the second sub-frame, the electric field applying component ET 1 -ET 4 , PL 1 , PL 2 applies the first electric field to the liquid crystal display medium LC 1 .
  • Step T 6 in the second sub-frame, the electric field applying component ET 1 -ET 4 , PL 1 , PL 2 applies the second electric field that is the same as or different from the first electric field to the liquid crystal display medium LC 2 .
  • Step T 7 in a third sub-frame, the third backlight source BL 3 is configured to provide a third-color light that is different from the first-color light and the second-color light to the liquid crystal display medium LC 1 , LC 2 .
  • Step T 8 in the third sub-frame, the electric field applying component ET 1 -ET 4 , PL 1 , PL 2 applies the first electric field to the liquid crystal display medium LC 1 .
  • Step T 9 in the third sub-frame, the electric field applying component ET 1 -ET 4 , PL 1 , PL 2 applies the second electric field that is different from the first electric field to the liquid crystal display medium LC 2 .
  • liquid crystal display medium LC 1 , LC 2 can allow more refined operations thereof, improving the displaying quality of the display device 100 A.
  • FIG. 10 is a flow chart of an operating method 200 B of a display device according to one embodiment of the present disclosure.
  • the operating method 200 B of a display device can be applied to a display device having a structure the same as or similar to that in FIG. 4 .
  • the display device 100 B in FIG. 4 is taken as an example below to describe the operating method 200 B of a display device according to one embodiment of the present disclosure, but the present disclosure is not limited thereto.
  • these steps can also be adaptively added, replaced, and/or omitted.
  • the operating method 200 B of a display device includes the following steps.
  • Step R 1 the first electric field applying component ET 11 -ET 14 , PL 11 , PL 12 applies a first electric field to the first portion LC 11 of the first liquid crystal display medium.
  • Step R 2 the first electric field applying component ET 11 -ET 14 , PL 11 , PL 12 applies a second electric field that is different from the first electric field to the second portion LC 12 of the first liquid crystal display medium.
  • Step R 3 the second electric field applying component ET 21 -ET 24 , PL 21 , PL 22 applies a third electric field to the first portion LC 21 of the second liquid crystal display medium.
  • Step R 4 the second electric field applying component ET 21 -ET 24 , PL 21 , PL 22 applies a fourth electric field that is the same as or different from the third electric field to the second portion LC 22 of the second liquid crystal display medium.
  • Step R 5 the third electric field applying component ET 31 -ET 34 , PL 31 , PL 32 applies a fifth electric field to the first portion LC 31 of the third liquid crystal display medium.
  • Step R 6 the third electric field applying component ET 31 -ET 34 , PL 31 , PL 32 applies a sixth electric field that is different from the fifth electric field to the second portion LC 32 of the third liquid crystal display medium.

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US20200004059A1 (en) 2020-01-02
TWI569062B (zh) 2017-02-01

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