WO2017020333A1 - 一种液晶显示器及其控制方法 - Google Patents

一种液晶显示器及其控制方法 Download PDF

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Publication number
WO2017020333A1
WO2017020333A1 PCT/CN2015/086740 CN2015086740W WO2017020333A1 WO 2017020333 A1 WO2017020333 A1 WO 2017020333A1 CN 2015086740 W CN2015086740 W CN 2015086740W WO 2017020333 A1 WO2017020333 A1 WO 2017020333A1
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Prior art keywords
pixel
liquid crystal
crystal display
control signal
sub
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PCT/CN2015/086740
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English (en)
French (fr)
Inventor
纪飞林
秦杰辉
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深圳市华星光电技术有限公司
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Priority to US14/776,858 priority Critical patent/US9886917B2/en
Publication of WO2017020333A1 publication Critical patent/WO2017020333A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3607—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
    • G09G3/003—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background to produce spatial visual effects
    • 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
    • G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
    • 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
    • G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3674—Details of drivers for scan electrodes
    • G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
    • 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
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0209—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display

Definitions

  • the present invention relates to the field of liquid crystals, and in particular to a liquid crystal display and a control method thereof.
  • the black insertion technique is often used to reduce the crosstalk phenomenon when the left and right eyes are viewing the picture. Specifically, by inserting a black picture in the middle of the two frames to cover the residual image of the gray of the picture, the crosstalk is reduced. The purpose of the phenomenon.
  • the black insertion technology can also be used to solve the problem that the liquid crystal display has a serious smear at a low refresh rate. Specifically, by inserting a black image in the middle of the two frames to increase the refresh rate of the liquid crystal display, the drag reduction can be achieved. The purpose of the phenomenon.
  • the traditional black insertion technology needs to output black picture data to insert a black picture through the timing controller (TCON), which is complicated and consumes a certain power consumption.
  • TCON timing controller
  • the technical problem to be solved by the present invention is to provide a liquid crystal display and a control method thereof, which can realize black insertion of a frame in a relatively simple and energy-saving manner, thereby solving the problem of crosstalk in 3D display or dragging due to a low refresh rate in a liquid crystal display. Serious problems.
  • a technical solution adopted by the present invention is to provide a liquid crystal display including: a plurality of data lines, a plurality of scan lines, and a plurality of pixel units, wherein each pixel unit is connected to a corresponding one of the data units a line and a scan line; the liquid crystal display further includes a plurality of switching elements, the first ends of each of the switching elements are connected together for receiving a control signal, and the second ends of each of the switching elements are connected together for receiving a reference voltage signal a third end of each switching element is connected to a corresponding one of the data lines; wherein, when the control signal is the first control signal, the switching element is turned off to cause the gray scale voltage signal to be applied to the corresponding pixel unit through the data line, the liquid crystal display Displaying a normal image frame; when the control signal is the second control signal, the switching element is turned on to apply the reference voltage signal to the corresponding pixel unit through the data line, and the liquid crystal display displays the black insertion frame; where
  • Each of the pixel units includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel
  • each of the scan lines includes a red scan line, a green scan line, and a blue scan line, and the red sub-pixel, the green sub-pixel, and the blue sub-pixel Connecting the corresponding red scan line, green scan line and blue scan line, the red sub-pixel, the green sub-pixel, and the blue sub-pixel are connected to the same data line; wherein, when the control signal is the first control signal, the red The scan signals on the scan line, the green scan line, and the blue scan line are time-sharing effective so that the gray scale voltage signal is time-divisionally applied to the corresponding red sub-pixel, green sub-pixel, and blue sub-pixel through the data line; when the control signal is In the second control signal, the scan signals on the red scan line, the green scan line, and the blue scan line are simultaneously active such that the reference voltage signal is simultaneously applied to the corresponding red sub-pixel, green sub-pixel, and blue sub-
  • the first control signal is a low level signal
  • the second control signal is a high level signal
  • the first control signal and the second control signal alternately appear.
  • the liquid crystal display further includes a driving chip, and the first end and the second end of each switching element are respectively connected to the driving chip, and the first end of each switching element is configured to receive a control signal outputted by the driving chip, and the second end is used for the second end To receive the reference voltage signal output by the driving chip.
  • the liquid crystal display further comprises a timing controller, a printed circuit board and a flip chip (COF), wherein the first end of each switching element is connected to the timing controller via a flip chip, the printed circuit board is connected to the timing controller, and the timing controller is received
  • the output control signal, the second end of each switching element is connected to a reference voltage signal in the flip chip.
  • a liquid crystal display including: a plurality of data lines, a plurality of scan lines, and a plurality of pixel units, wherein each pixel unit is connected to a corresponding one of the pixels a data line and a scan line; the liquid crystal display further includes a plurality of switching elements, the first ends of each of the switching elements are connected together for receiving a control signal, and the second ends of each of the switching elements are connected together for receiving a reference voltage a signal, a third end of each switching element is connected to a corresponding one of the data lines; wherein, when the control signal is the first control signal, the switching element is turned off to apply the gray scale voltage signal to the corresponding pixel unit through the data line, The display displays a normal image frame; when the control signal is the second control signal, the switching element is turned on to cause the reference voltage signal to be applied to the corresponding pixel unit through the data line, and the liquid crystal display displays the black frame.
  • Each of the pixel units includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel
  • each of the scan lines includes a red scan line, a green scan line, and a blue scan line, and the red sub-pixel, the green sub-pixel, and the blue sub-pixel Connecting the corresponding red scan line, green scan line and blue scan line, the red sub-pixel, the green sub-pixel, and the blue sub-pixel are connected to the same data line; wherein, when the control signal is the first control signal, the red The scan signals on the scan line, the green scan line, and the blue scan line are time-sharing effective so that the gray scale voltage signal is time-divisionally applied to the corresponding red sub-pixel, green sub-pixel, and blue sub-pixel through the data line; when the control signal is In the second control signal, the scan signals on the red scan line, the green scan line, and the blue scan line are simultaneously active such that the reference voltage signal is simultaneously applied to the corresponding red sub-pixel, green sub-pixel, and blue sub-
  • the switching element is an N-type MOS transistor, and the first end, the second end and the third end of the switching element are respectively a gate, a drain and a source of the MOS transistor.
  • the first control signal is a low level signal
  • the second control signal is a high level signal
  • the first control signal and the second control signal alternately appear.
  • the liquid crystal display further includes a driving chip, and the first end and the second end of each switching element are respectively connected to the driving chip, and the first end of each switching element is configured to receive a control signal outputted by the driving chip, and the second end is used for the second end To receive the reference voltage signal output by the driving chip.
  • the liquid crystal display further comprises a timing controller, a printed circuit board and a flip chip (COF), wherein the first end of each switching element is connected to the timing controller via a flip chip, the printed circuit board is connected to the timing controller, and the timing controller is received
  • the output control signal, the second end of each switching element is connected to a reference voltage signal in the flip chip.
  • the reference voltage signal is a common voltage signal applied to the common electrode of the liquid crystal display.
  • another technical solution adopted by the present invention is to provide a control method for a liquid crystal display, the control method comprising: controlling a switching element to be turned off by a first control signal, thereby causing a gray scale voltage signal to be applied through a data line.
  • the liquid crystal display displays a normal image frame; the second control signal controls the switching element to be turned on, so that the reference voltage signal is applied to the corresponding pixel unit through the data line, and the liquid crystal display displays the black frame.
  • the pixel unit includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel.
  • the control method further includes: controlling, by the scan signal, the gray-scale voltage signal to be applied to the corresponding red sub-pixel, the green sub-pixel, and the blue through the data line. a color sub-pixel; and the reference voltage signal is controlled by the scan signal to be simultaneously applied to the corresponding red sub-pixel, green sub-pixel, and blue sub-pixel through the data line.
  • the grayscale voltage signals corresponding to adjacent normal image frames have opposite polarities.
  • the beneficial effects of the present invention are: the liquid crystal display of the present invention and the control method thereof control the switching element to be cut off so that the gray scale voltage signal is applied to the corresponding pixel unit through the data line, thereby causing the liquid crystal display to display a normal image frame;
  • the reference voltage signal is applied to the corresponding pixel unit through the data line, thereby causing the liquid crystal display to display the black frame.
  • the present invention can realize black insertion of a frame in a relatively simple and energy-saving manner, thereby solving the problem of crosstalk in 3D display or the problem of severe smear due to a low refresh rate in a liquid crystal display.
  • FIG. 1 is a schematic structural view of a liquid crystal display device according to a first embodiment of the present invention
  • FIG. 2 is a flow chart of a control method of the liquid crystal display shown in FIG. 1;
  • FIG. 3 is a signal timing diagram of a control method of the liquid crystal display shown in FIG. 2;
  • FIG. 4 is a schematic structural view of a liquid crystal display device according to a second embodiment of the present invention.
  • Figure 5 is a flow chart showing a control method of the liquid crystal display shown in Figure 4.
  • Fig. 6 is a signal timing chart of the control method of the liquid crystal display shown in Fig. 5.
  • the liquid crystal display 100 includes: data lines S1, ..., Sm (where m is a natural number), scanning lines G1, ..., Gn (where n is a natural number), a plurality of pixel units 10, and a plurality of switching elements 11 And drive chip 12.
  • Each of the pixel units 10 is connected to a corresponding one of the data lines and one of the scan lines.
  • the data lines S1, ..., Sm are connected to the drive chip 12, respectively.
  • the first ends of each of the switching elements 11 are connected to each other and connected to the driving chip 12 for receiving the control signal BLACK_EN outputted by the driving chip 12; the second ends of each switching element 11 are connected to each other and connected to the driving chip 12 for The reference voltage signal VCOM outputted by the driving chip 12 is received, and the third end of each switching element 11 is connected to a corresponding one of the data lines.
  • the switching element 11 is disposed in a non-display area of the liquid crystal display 100.
  • control signal BLACK_EN when the control signal BLACK_EN is the first control signal, the switching element 11 is turned off, and the gray scale voltage signal outputted by the driving chip 12 is applied to the corresponding pixel unit 10 through the data lines S1, . . . , Sm, and the liquid crystal display 100 displays the normal image frame;
  • control signal BLACK_EN is the second control signal, the switching element 11 is turned on, and the reference voltage signal VCOM outputted by the driving chip 12 is applied to the corresponding pixel unit 10 through the data lines S1, . . . , Sm, and the liquid crystal display 100 displays the black frame.
  • the switching element 11 is an N-type MOS transistor, and the first end, the second end, and the third end of the switching element 11 are respectively a gate, a drain, and a source of the N-type MOS transistor.
  • the first control signal is a low level signal
  • the second control signal is a high level signal
  • the first control signal and the second control signal alternately appear.
  • the driving chip 12 When the first control signal, that is, the low level signal is applied to the gate of the N-type MOS transistor, the drain and the source of the N-type MOS transistor are turned off, and the driving chip 12 outputs the gray scale voltage signal to the data lines S1, . . . Sm.
  • the liquid crystal display 100 displays a normal image frame; when the second control signal, that is, the high level signal is applied to the gate of the N-type MOS transistor, the drain and the source of the N-type MOS transistor are turned on, and the driving chip 12 is turned to the N-type MOS. While the source of the tube outputs the reference voltage signal VCOM, the driving chip 12 stops outputting the gray scale voltage signal to the data lines S1, . . . Sm.
  • the pins of the driving chip 12 connected to the data lines S1, . . . Sm are in a high impedance state, and the reference is made.
  • the voltage signal VCOM is applied to the respective pixel units 10 via the drains and sources of the N-type MOS transistors via the data lines S1, . . . , Sm so that the liquid crystal display 100 displays the black-frames.
  • the first control signal and the second control signal alternately appear such that the normal image frame and the black insertion frame are alternately displayed, thereby solving the problem of crosstalk in the 3D display or the serious smear caused by the low refresh rate in the liquid crystal display.
  • the reference voltage signal VCOM is a signal output from the driving chip 12. In other embodiments, the reference voltage signal VCOM may also be a common voltage signal applied to a common electrode (not shown) of the liquid crystal display 100.
  • FIG. 2 is a flow chart of a control method of the liquid crystal display shown in FIG. 1. As shown in Figure 2, the method includes the steps of:
  • Step S101 The switching element is controlled to be turned off by the first control signal, so that the gray scale voltage signal is applied to the corresponding pixel unit through the data line, and the liquid crystal display displays the normal image frame.
  • step S101 when the switching element is an N-type MOS transistor, the first control signal is a low level signal, and the first control signal is applied to the first end of the switching element, that is, the gate of the N-type MOS transistor, thereby causing the switching element
  • the second end and the third end are turned off, that is, the source and the drain of the N-type MOS transistor are turned off, and the gray scale voltage signal outputted by the driving chip is applied to the corresponding pixel unit through the data line, and the liquid crystal display displays a normal image frame.
  • the switching element can also be other switching elements different from the N-type MOS tube, such as an NPN transistor, as long as it can perform the function of turning off and conducting under the control of the control signal. Just fine.
  • Step S102 The switching element is controlled to be turned on by the second control signal, so that the reference voltage signal is applied to the corresponding pixel unit through the data line, and the liquid crystal display displays the black frame.
  • the second control signal is a high level signal, and the second control signal is applied to the first end of the switching element, that is, the gate of the N-type MOS transistor, so that the second end and the third end of the switching element
  • the source and the drain of the N-type MOS transistor are turned on, and the reference voltage signal is applied to the corresponding pixel unit through the drain and source of the N-type MOS transistor, and the liquid crystal display displays the black frame.
  • Step S101 and step S102 are repeated, so that the liquid crystal display 100 alternately displays the normal image frame and the black insertion frame.
  • FIG. 3 is a signal timing diagram of the control method of the liquid crystal display shown in FIG. 2.
  • the T axis represents the time axis and the V axis represents the voltage axis.
  • 0 to T1 are the time for displaying the first frame image frame (Frame1)
  • T1 to T2 are the time for displaying the first frame insertion black frame (Black1)
  • T2 to T3 are the time for displaying the second frame image frame (Frame2).
  • T3 to T4 are times when the second frame is inserted into the black frame (Black2).
  • BLACK indicates the timing of the control signal applied to the first terminal of the switching element, that is, the gate of the N-type MOS transistor, and S(2n-1) indicates the timing of the signal applied to the 2n-1th data line, S(2n) ) indicates the timing of the signal applied to the 2nth data line.
  • a first control signal that is, a low level signal VGL is applied to the BLACK, and a gray scale voltage signal is applied to S(2n-1) and S(2n), where S(2n-1)
  • the liquid crystal display 100 displays the first frame of image frames.
  • the second control signal that is, the high level signal VGH is applied to the BLACK
  • the reference voltage signal VCOM is applied to S(2n-1) and S(2n)
  • the liquid crystal display 100 displays the first frame insertion. Black frame.
  • a first control signal that is, a low level signal VGL is applied to the BLACK, and a gray scale voltage signal is applied to S(2n-1) and S(2n), where S(2n-1)
  • the polarity of the gray scale voltage signal applied on S(2n) is opposite, and the liquid crystal display 100 displays the second frame of the image frame.
  • the grayscale voltage signal corresponding to the second frame image frame and the grayscale voltage signal corresponding to the first frame image frame are also opposite in polarity.
  • the second control signal that is, the high level signal VGH, the reference voltage signal VCOM is applied to the S(2n-1) and S(2n), and the second frame insertion is displayed on the LCD display 100. Black frame.
  • the timings on the subsequent BLACK, S(2n-1), and S(2n) are repeatedly repeated in accordance with the timing displayed in the 0 ⁇ T4 time interval, so that the normal image frame and the black insertion frame are alternately displayed on the liquid crystal display 100.
  • the liquid crystal display 100 in the above embodiment is applied to a small-sized mobile phone and a tablet computer (portable android) Device, PAD) small size LCD display.
  • the liquid crystal display is a large-sized liquid crystal display applied to a large-sized television (TV) or a monitor
  • the liquid crystal display includes a timing controller (TCON), a printed circuit board (PCB), and a flip chip (COF).
  • the first end of the switching element 11 is connected to the timing controller via a flip chip, and the printed circuit board is connected to the timing controller for receiving the control signal BLACK_EN outputted by the timing controller, the second end of the switching element 11 and the reference voltage in the flip chip.
  • the signal VCOM is connected.
  • the reference voltage signal VCOM in the flip chip is a common voltage signal applied to the common electrode of the liquid crystal display.
  • the liquid crystal display 200 includes: data lines S1, ..., Sm (where m is a natural number), scanning lines G1, ..., Gn (where n is a natural number), a plurality of pixel units 20, and a plurality of switching elements 21 And drive chip 22.
  • Each of the pixel units 20 includes a red sub-pixel 201, a green sub-pixel 202, and a blue sub-pixel 203.
  • Each of the scanning lines G includes a red scanning line Gr, a green scanning line Gg, and a blue scanning line Gb.
  • the red sub-pixel 201, the green sub-pixel 202, and the blue sub-pixel 203 are connected to their corresponding red scan lines Gr, green scan lines Gg, and blue scan lines Gb, red sub-pixels 201, green sub-pixels 202, and blue sub-pixels 203. Connect the corresponding data line.
  • the data lines S1, . . . Sm are respectively connected to the driving chip 22.
  • the first ends of each of the switching elements 21 are connected to each other and connected to the driving chip 22 for receiving the control signal BLACK_EN outputted by the driving chip 22; the second ends of each switching element 21 are connected to each other and connected to the driving chip 22 for The reference voltage signal VCOM outputted by the driving chip 22 is received, and the third end of each switching element 21 is connected to a corresponding one of the data lines.
  • the switching element 21 is disposed in a non-display area of the liquid crystal display 200.
  • the liquid crystal display 200 displays a normal image frame.
  • the control signal BLACK_EN is the second control signal
  • the scan signals on the red scan line Gr, the green scan line Gg, and the blue scan line Gb are simultaneously enabled to simultaneously apply the reference voltage signal VCOM through the data lines S1, . . . Sm to the corresponding The red sub-pixel 201, the green sub-pixel 202, and the blue sub-pixel 203
  • the liquid crystal display 200 displays a black-frame.
  • the switching element 21 is an N-type MOS transistor, and the first end, the second end, and the third end of the switching element 21 are respectively a gate, a drain, and a source of the N-type MOS transistor.
  • the first control signal is a low level signal
  • the second control signal is a high level signal
  • the first control signal and the second control signal alternately appear.
  • the first control signal that is, the low level signal is applied to the gate of the N-type MOS transistor
  • the drain and the source of the N-type MOS transistor are turned off, and the red scan line Gr, the green scan line Gg, and the blue scan line Gb are turned on.
  • the scanning signal is time-divided so that the gray scale voltage signal outputted by the driving chip 22 is time-divisionally applied to the corresponding red sub-pixel 201, green sub-pixel 202, and blue sub-pixel 203 through the data lines S1, . . . Sm, and the liquid crystal display 200 displays Normal image frame.
  • the second control signal that is, the high level signal
  • the drain and the source of the N-type MOS transistor are turned on, and the driving chip 22 outputs the reference voltage signal to the source of the N-type MOS transistor.
  • the simultaneous driving chip 22 of the VCOM stops outputting the gray scale voltage signal to the data lines S1, . . . Sm.
  • the scanning signals on the red scanning line Gr, the green scanning line Gg and the blue scanning line Gb are simultaneously active, and the reference voltage signal VCOM passes through N.
  • the drain and source of the MOS transistor are simultaneously applied to the corresponding red sub-pixel 201, green sub-pixel 202, and blue sub-pixel 203 via data lines S1, . . . Sm, thereby causing liquid crystal display 200 to display a black frame.
  • the first control signal and the second control signal alternately appear such that the normal image frame and the black insertion frame are alternately displayed, thereby solving the problem of crosstalk in the 3D display or the serious smear caused by the low refresh rate in the liquid crystal display.
  • the reference voltage signal VCOM is a signal output from the driving chip 22.
  • the reference voltage signal VCOM can also be a common voltage signal applied to a common electrode (not shown) of the liquid crystal display 200.
  • the liquid crystal display 200 in this embodiment is a small-sized liquid crystal display applied to a small-sized mobile phone or a tablet computer.
  • Fig. 5 is a flow chart showing a control method of the liquid crystal display shown in Fig. 4. As shown in FIG. 5, the method includes the steps of:
  • Step S201 The switching element is controlled to be turned off by the first control signal, and the gray scale voltage signal is controlled by the scan signal to be applied to the corresponding red sub-pixel, the green sub-pixel and the blue sub-pixel through the data line, and the liquid crystal display displays the normal image frame.
  • step S201 when the switching element is an N-type MOS transistor, the first control signal is a low level signal, and the first control signal is applied to the first end of the switching element, that is, the gate of the N-type MOS transistor, thereby causing the switching element
  • the second end and the third end are turned off, that is, the source and drain of the N-type MOS transistor are turned off, and the scanning signals of the red scan line, the green scan line, and the blue scan line are time-divisionally effective to make the gray scale of the driver chip output.
  • the voltage signal is time-divisionally applied to the corresponding red sub-pixel, green sub-pixel, and blue sub-pixel through the data line, and the liquid crystal display displays a normal image frame.
  • the switching element can also be other switching elements different from the N-type MOS tube, such as an NPN transistor, as long as it can perform the function of turning off and conducting under the control of the control signal. Just fine.
  • Step S202 The switching element is controlled to be turned on by the second control signal, and the reference voltage signal is controlled by the scan signal to be simultaneously applied to the corresponding red sub-pixel, the green sub-pixel and the blue sub-pixel through the data line, and the liquid crystal display displays the black frame.
  • a second control signal that is, a high level signal is applied to the first end of the switching element, that is, the gate of the N-type MOS transistor, so that the second end and the third end of the switching element are turned on, that is, N.
  • the source and drain of the MOS transistor are turned on.
  • the scan signals of the red scan line, the green scan line, and the blue scan line are simultaneously valid, and the reference voltage signal passes through the drain and source of the N-type MOS transistor.
  • the line is simultaneously applied to the corresponding red sub-pixel, green sub-pixel, and blue sub-pixel, thereby causing the liquid crystal display to display a black frame.
  • Step S201 and step S202 are repeated, so that the liquid crystal display alternately displays the normal image frame and the black insertion frame.
  • FIG. 6 is a signal timing diagram of the control method of the liquid crystal display shown in FIG. 5.
  • the T axis represents the time axis and the V axis represents the voltage axis.
  • 0 to T1 are the time for displaying the first frame image frame (Frame1)
  • T1 to T2 are the time for displaying the first frame insertion black frame (Black1)
  • T2 to T3 are the time for displaying the second frame image frame (Frame2).
  • T3 to T4 are times when the second frame is inserted into the black frame (Black2).
  • Gr denotes the timing of the scanning signal applied on the red scanning line
  • Gg denotes the timing of the scanning signal applied on the green scanning line
  • Gb denotes the timing of the scanning signal applied to the blue scanning line
  • BLACK denotes the timing applied to the switching element
  • S(2n-1) indicates the timing of the signal applied to the 2n-1th data line
  • S(2n) indicates the data applied to the 2nth data.
  • the scanning signals applied on Gr, Gg, and Gb are time-dependent, that is, the scanning signals applied on Gr, Gg, and Gb are time-divided as high-level signals, preferably, Gr, Gg, and The time during which the scan signal on Gb is at a high level is the same.
  • a first control signal that is, a low level signal VGL is applied to the BLACK, and a gray scale voltage signal is applied to S(2n-1) and S(2n), wherein the gray applied on S(2n-1) and S(2n)
  • the order voltage signals are of opposite polarity and the liquid crystal display 200 displays the first frame of image frames.
  • the scanning signals applied on Gr, Gg, and Gb are simultaneously active, that is, the scanning signals applied on Gr, Gg, and Gb are simultaneously high level signals.
  • a second control signal that is, a high level signal VGH is applied to the BLACK, and the reference voltage signal VCOM is applied to S(2n-1) and S(2n), and the liquid crystal display 200 displays the black frame of the first frame.
  • the scanning signals applied on Gr, Gg and Gb are time-dependent, and the first control signals, that is, the low-level signals VGL, S(2n-1) and S(2n) are applied to the BLACK.
  • a gray scale voltage signal is applied, wherein the gray scale voltage signals applied on S(2n-1) and S(2n) are opposite in polarity, and the liquid crystal display 200 displays the second frame image frame.
  • the gray scale voltage signal corresponding to the first frame image frame and the gray scale voltage signal corresponding to the second frame image frame are opposite in polarity.
  • the scanning signals applied on Gr, Gg, and Gb are simultaneously valid, and the second control signal applied on the BLACK, that is, the high level signals VGH, S(2n-1) and S(2n) are applied.
  • the reference voltage signal VCOM the liquid crystal display 200 displays a black frame inserted in the second frame.
  • the timings on the subsequent Gr, Gg, Gb, BLACK, S(2n-1), and S(2n) are repeated according to the timing displayed in the 0 ⁇ T4 time interval, so that the normal image frame and the black insertion frame are alternately displayed.
  • the beneficial effects of the present invention are: the liquid crystal display of the present invention and the control method thereof control the switching element to be cut off such that the gray scale voltage signal is applied to the corresponding pixel unit through the data line, thereby causing the liquid crystal display to display a normal image frame; and by controlling the switching element Turning on causes the reference voltage signal to be applied to the corresponding pixel unit through the data line, thereby causing the liquid crystal display to display a black frame.
  • the present invention can realize black insertion of a frame in a relatively simple and energy-saving manner, thereby solving the problem of crosstalk in 3D display or the problem of severe smear due to a low refresh rate in a liquid crystal display.

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Abstract

一种液晶显示器及其控制方法。该液晶显示器包括：多条数据线（S1-Sm）、多条扫描线（G1-Gn）、多个像素单元（10）和多个开关元件（11），其中，每个开关元件（11）的第一端连接在一起用以接收控制信号，第二端连接在一起用以接收参考电压信号，第三端连接其对应的一条数据线（S1-Sm）；当控制信号为第一控制信号时，开关元件（11）截止以使灰阶电压信号通过数据线（S1-Sm）施加至像素单元（10），液晶显示器显示正常图像帧；当控制信号为第二控制信号时，开关元件（11）导通以使参考电压信号通过数据线（S1-Sm）施加至像素单元（10），液晶显示器显示插黑帧。通过上述方式，能够以相对简单以及节能的方式实现插黑帧，从而解决3D显示中串扰的问题或者液晶显示器中由于低刷新率而导致拖影严重的问题。

Description

一种液晶显示器及其控制方法
【技术领域】
本发明涉及液晶领域，特别是涉及一种液晶显示器及其控制方法。
【背景技术】
目前，在3D显示中常采用插黑技术来减少左右眼观看画面时出现串扰现象，具体来说，通过在两帧画面的中间***一个黑画面，以掩盖住画面灰色的滞留残像，从而达到减少串扰现象的目的。另外，插黑技术也可以用于解决液晶显示器在低刷新率下拖影严重的问题，具体来说，通过在两帧画面的中间***一个黑画面以提高液晶显示器的刷新率，从而达到减少拖影现象的目的。
传统的插黑技术通过时序控制器（TCON）需要输出黑画面数据来***黑画面，实现复杂且需要消耗一定的功耗。
【发明内容】
本发明主要解决的技术问题是提供一种液晶显示器及其控制方法，能够以相对简单且节能的方式实现插黑帧，从而解决3D显示中串扰的问题或者液晶显示器中由于低刷新率而导致拖影严重的问题。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种液晶显示器，包括：多条数据线、多条扫描线和多个像素单元，其中，每个像素单元连接其对应的一条数据线和一条扫描线；该液晶显示器还包括多个开关元件，每个开关元件的第一端连接在一起用以接收控制信号，每个开关元件的第二端连接在一起用以接收参考电压信号，每个开关元件的第三端连接其对应的一条数据线；其中，当控制信号为第一控制信号时，开关元件截止以使灰阶电压信号通过数据线施加至对应的像素单元，液晶显示器显示正常图像帧；当控制信号为第二控制信号时，开关元件导通以使参考电压信号通过数据线施加至对应的像素单元，液晶显示器显示插黑帧；其中，开关元件为N型MOS管，开关元件的第一端、第二端和第三端分别为MOS管的栅极、漏极和源极；其中，参考电压信号为施加于液晶显示器的公共电极上的公共电压信号。
其中，每个像素单元包括红色子像素、绿色子像素和蓝色子像素，每条扫描线包括红色扫描线、绿色扫描线和蓝色扫描线，红色子像素、绿色子像素和蓝色子像素连接其对应的红色扫描线、绿色扫描线和蓝色扫描线，红色子像素、绿色子像素、蓝色子像素连接对应的同一条数据线；其中，当控制信号为第一控制信号时，红色扫描线、绿色扫描线和蓝色扫描线上的扫描信号分时有效以使灰阶电压信号分时通过数据线施加至对应的红色子像素、绿色子像素和蓝色子像素；当控制信号为第二控制信号时，红色扫描线、绿色扫描线和蓝色扫描线上的扫描信号同时有效以使参考电压信号通过数据线同时施加至对应的红色子像素、绿色子像素和蓝色子像素。
其中，第一控制信号为低电平信号，第二控制信号为高电平信号，第一控制信号和第二控制信号交替出现。
其中，该液晶显示器进一步包括驱动芯片，每个开关元件的第一端、第二端分别与驱动芯片连接，每个开关元件的第一端用以接收驱动芯片输出的控制信号，第二端用以接收驱动芯片输出的参考电压信号。
其中，该液晶显示器进一步包括时序控制器、印刷电路板和覆晶薄膜（COF），每个开关元件的第一端经覆晶薄膜、印刷电路板与时序控制器连接，用以接收时序控制器输出的控制信号，每个开关元件的第二端与覆晶薄膜中的参考电压信号相连。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种液晶显示器，包括：多条数据线、多条扫描线和多个像素单元，其中，每个像素单元连接其对应的一条数据线和一条扫描线；该液晶显示器还包括多个开关元件，每个开关元件的第一端连接在一起用以接收控制信号，每个开关元件的第二端连接在一起用以接收参考电压信号，每个开关元件的第三端连接其对应的一条数据线；其中，当控制信号为第一控制信号时，开关元件截止以使灰阶电压信号通过数据线施加至对应的像素单元，液晶显示器显示正常图像帧；当控制信号为第二控制信号时，开关元件导通以使参考电压信号通过数据线施加至对应的像素单元，液晶显示器显示插黑帧。
其中，每个像素单元包括红色子像素、绿色子像素和蓝色子像素，每条扫描线包括红色扫描线、绿色扫描线和蓝色扫描线，红色子像素、绿色子像素和蓝色子像素连接其对应的红色扫描线、绿色扫描线和蓝色扫描线，红色子像素、绿色子像素、蓝色子像素连接对应的同一条数据线；其中，当控制信号为第一控制信号时，红色扫描线、绿色扫描线和蓝色扫描线上的扫描信号分时有效以使灰阶电压信号分时通过数据线施加至对应的红色子像素、绿色子像素和蓝色子像素；当控制信号为第二控制信号时，红色扫描线、绿色扫描线和蓝色扫描线上的扫描信号同时有效以使参考电压信号通过数据线同时施加至对应的红色子像素、绿色子像素和蓝色子像素。
其中，开关元件为N型MOS管，开关元件的第一端、第二端和第三端分别为MOS管的栅极、漏极和源极。
其中，第一控制信号为低电平信号，第二控制信号为高电平信号，第一控制信号和第二控制信号交替出现。
其中，该液晶显示器进一步包括驱动芯片，每个开关元件的第一端、第二端分别与驱动芯片连接，每个开关元件的第一端用以接收驱动芯片输出的控制信号，第二端用以接收驱动芯片输出的参考电压信号。
其中，该液晶显示器进一步包括时序控制器、印刷电路板和覆晶薄膜（COF），每个开关元件的第一端经覆晶薄膜、印刷电路板与时序控制器连接，用以接收时序控制器输出的控制信号，每个开关元件的第二端与覆晶薄膜中的参考电压信号相连。
其中，参考电压信号为施加于液晶显示器的公共电极上的公共电压信号。
为解决上述技术问题，本发明采用的又一个技术方案是：提供一种液晶显示器的控制方法，该控制方法包括：由第一控制信号控制开关元件截止，进而使得灰阶电压信号通过数据线施加至对应的像素单元，液晶显示器显示正常图像帧；由第二控制信号控制开关元件导通，进而使得参考电压信号通过数据线施加至对应的像素单元，液晶显示器显示插黑帧。
其中，像素单元包括红色子像素、绿色子像素和蓝色子像素，该控制方法进一步包括：由扫描信号控制灰阶电压信号通过数据线分时施加至对应的红色子像素、绿色子像素和蓝色子像素；以及由扫描信号控制参考电压信号通过数据线同时施加至对应的红色子像素、绿色子像素和蓝色子像素。
其中，相邻的正常图像帧对应的灰阶电压信号极性相反。
本发明的有益效果是：本发明的液晶显示器及其控制方法通过控制开关元件截止使得灰阶电压信号通过数据线施加至对应的像素单元，进而使得液晶显示器显示正常图像帧；通过控制开关元件导通使得参考电压信号通过数据线施加至对应的像素单元，进而使得液晶显示器显示插黑帧。通过上述方式，本发明能够以相对简单以及节能的方式实现插黑帧，从而解决3D显示中串扰的问题或者液晶显示器中由于低刷新率而导致拖影严重的问题。
【附图说明】
图1是本发明第一实施例的液晶显示器的结构示意图；
图2是图1所示的液晶显示器的控制方法的流程图；
图3是图2所示的液晶显示器的控制方法的信号时序图；
图4是本发明第二实施例的液晶显示器的结构示意图；
图5是图4所示的液晶显示器的控制方法的流程图；
图6是图5所示的液晶显示器的控制方法的信号时序图。
【具体实施方式】
在说明书及权利要求书当中使用了某些词汇来指称特定的组件，所属领域中的技术人员应可理解，制造商可能会用不同的名词来称呼同样的组件。本说明书及权利要求书并不以名称的差异来作为区分组件的方式，而是以组件在功能上的差异来作为区分的基准。下面结合附图和实施例对本发明进行详细说明。
图1是本发明第一实施例的液晶显示器的结构示意图。如图1所示，液晶显示器100包括：数据线S1、…Sm（其中，m为自然数），扫描线G1、…Gn（其中，n为自然数）、多个像素单元10、多个开关元件11和驱动芯片12。
其中，每个像素单元10连接其对应的一条数据线和一条扫描线。数据线S1、…Sm分别与驱动芯片12连接。每个开关元件11的第一端相互连接后与驱动芯片12连接，用以接收驱动芯片12输出的控制信号BLACK_EN；每个开关元件11的第二端相互连接后与驱动芯片12连接，用以接收驱动芯片12输出的参考电压信号VCOM，每个开关元件11的第三端连接其对应的一条数据线。其中，开关元件11设置于液晶显示器100的非显示区域。
其中，当控制信号BLACK_EN为第一控制信号时，开关元件11截止，驱动芯片12输出的灰阶电压信号通过数据线S1、…Sm施加至对应的像素单元10，液晶显示器100显示正常图像帧；当控制信号BLACK_EN为第二控制信号时，开关元件11导通，驱动芯片12输出的参考电压信号VCOM通过数据线S1、…Sm施加至对应的像素单元10，液晶显示器100显示插黑帧。
具体来说，开关元件11为N型MOS管，开关元件11的第一端、第二端和第三端分别为N型MOS管的栅极、漏极和源极。第一控制信号为低电平信号，第二控制信号为高电平信号，第一控制信号和第二控制信号交替出现。
当第一控制信号也即低电平信号施加至N型MOS管的栅极后，N型MOS管的漏极和源极截止，驱动芯片12向数据线S1、…Sm输出灰阶电压信号使得液晶显示器100显示正常图像帧；当第二控制信号也即高电平信号施加至N型MOS管的栅极后，N型MOS管的漏极和源极导通，驱动芯片12向N型MOS管的源极输出参考电压信号VCOM的同时驱动芯片12停止向数据线S1、…Sm输出灰阶电压信号，此时驱动芯片12与数据线S1、…Sm相连的管脚处于高阻态，参考电压信号VCOM经过N型MOS管的漏极、源极后经数据线S1、…Sm施加至各像素单元10从而使得液晶显示器100显示插黑帧。
其中，第一控制信号和第二控制信号交替出现使得正常图像帧和插黑帧交替显示，从而可以解决3D显示中串扰的问题或者液晶显示器中由于低刷新率而导致拖影严重的问题。
在本实施例中，参考电压信号VCOM为驱动芯片12输出的信号。在其它实施例中，参考电压信号VCOM也可以为施加在液晶显示器100的公共电极上（未图示）的公共电压信号。
图2是图1所示的液晶显示器的控制方法的流程图。如图2所示，该方法包括步骤：
步骤S101：由第一控制信号控制开关元件截止，进而使得灰阶电压信号通过数据线施加至对应的像素单元，液晶显示器显示正常图像帧。
在步骤S101中，当开关元件为N型MOS管，第一控制信号为低电平信号，第一控制信号施加在开关元件的第一端也即N型MOS管的栅极，从而使得开关元件的第二端和第三端截止也即N型MOS管的源极和漏极截止，驱动芯片输出的灰阶电压信号通过数据线施加至对应的像素单元，液晶显示器显示正常图像帧。
本领域技术人员可以理解，在其它实施例中，开关元件也可以为不同于N型MOS管的其它开关元件，例如NPN三极管，只要其在控制信号的控制下，能实现截止和导通的功能即可。
步骤S102：由第二控制信号控制开关元件导通，进而使得参考电压信号通过数据线施加至对应的像素单元，液晶显示器显示插黑帧。
在步骤S102中，第二控制信号为高电平信号，第二控制信号施加在开关元件的第一端也即N型MOS管的栅极，从而使得开关元件的第二端和第三端导通也即N型MOS管的源极和漏极导通，参考电压信号通过N型MOS管的漏极、源极后经数据线施加至对应的像素单元，液晶显示器显示插黑帧。
其中步骤S101和步骤S102重复操作，使得液晶显示器100交替显示正常图像帧和插黑帧。
请一并参考图3，图3是图2所示的液晶显示器的控制方法的信号时序图。如图3所示，T轴表示时间轴、V轴表示电压轴。其中，0到T1为显示第一帧图像帧（Frame1）的时间、T1到T2为显示第一帧插黑帧（Black1）的时间、T2到T3为显示第二帧图像帧（Frame2）的时间、T3到T4为显示第二帧插黑帧（Black2）的时间。
BLACK表示施加在开关元件的第一端也即N型MOS管的栅极的控制信号的时序，S(2n-1)表示施加在第2n-1条数据线上的信号的时序，S(2n)表示施加在第2n条数据线上的信号的时序。
在0~T1的时间间隔内，BLACK上施加第一控制信号也即低电平信号VGL，S(2n-1)和S(2n)上施加灰阶电压信号，其中，S(2n-1)和S(2n)上施加的灰阶电压信号极性相反，液晶显示器100显示第一帧图像帧。
在T1~T2的时间间隔内，BLACK上施加第二控制信号也即高电平信号VGH，S(2n-1)和S(2n)上施加参考电压信号VCOM，液晶显示器100显示第一帧插黑帧。
在T2~T3的时间间隔内，BLACK上施加第一控制信号也即低电平信号VGL，S(2n-1)和S(2n)上施加灰阶电压信号，其中，S(2n-1)和S(2n)上施加的灰阶电压信号极性相反，液晶显示器100显示第二帧图像帧。另外，在S(2n-1)或S(2n)上，第二帧图像帧对应的灰阶电压信号和第一帧图像帧对应的灰阶电压信号的极性也相反。
在T3~T4的时间间隔内，BLACK上施加第二控制信号也即高电平信号VGH，S(2n-1)和S(2n)上施加参考电压信号VCOM，液晶显示器100显示第二帧插黑帧。
后续BLACK、S(2n-1)和S(2n)上的时序按照0~T4时间间隔内所显示的时序重复出现，从而使得正常图像帧和插黑帧在液晶显示器100上交替显示。
上述实施例中的液晶显示器100为应用于小尺寸手机、平板电脑(portable android device，PAD)的小尺寸液晶显示器。当液晶显示器为应用于大尺寸电视（TV）、监控器(Monitor)的大尺寸液晶显示器时，液晶显示器包括时序控制器（TCON）、印刷电路板（PCB）和覆晶薄膜（COF）。其中，开关元件11的第一端经覆晶薄膜、印刷电路板与时序控制器连接，用以接收时序控制器输出的控制信号BLACK_EN，开关元件11的第二端与覆晶薄膜中的参考电压信号VCOM相连。优选地，覆晶薄膜中的参考电压信号VCOM为施加在液晶显示器的公共电极上的公共电压信号。
图4是本发明第二实施例的液晶显示器的结构示意图。如图4所示，液晶显示器200包括：数据线S1、…Sm（其中，m为自然数），扫描线G1、…Gn（其中，n为自然数）、多个像素单元20、多个开关元件21和驱动芯片22。
其中，每个像素单元20包括红色子像素201、绿色子像素202和蓝色子像素203。每条扫描线G包括红色扫描线Gr，绿色扫描线Gg和蓝色扫描线Gb。红色子像素201、绿色子像素202和蓝色子像素203连接其对应的红色扫描线Gr、绿色扫描线Gg和蓝色扫描线Gb，红色子像素201、绿色子像素202、蓝色子像素203连接对应的同一条数据线。
其中，数据线S1、…Sm分别与驱动芯片22连接。每个开关元件21的第一端相互连接后与驱动芯片22连接，用以接收驱动芯片22输出的控制信号BLACK_EN；每个开关元件21的第二端相互连接后与驱动芯片22连接，用以接收驱动芯片22输出的参考电压信号VCOM，每个开关元件21的第三端连接其对应的一条数据线。其中，开关元件21设置于液晶显示器200的非显示区域。
其中，当控制信号BLACK_EN为第一控制信号时，红色扫描线Gr、绿色扫描线Gg和蓝色扫描线Gb上的扫描信号分时有效以使灰阶电压信号分时通过数据线S1、…Sm施加至对应的红色子像素201、绿色子像素202和蓝色子像素203，液晶显示器200显示正常图像帧。当控制信号BLACK_EN为第二控制信号时，红色扫描线Gr、绿色扫描线Gg和蓝色扫描线Gb上的扫描信号同时有效以使参考电压信号VCOM通过数据线S1、…Sm同时施加至对应的红色子像素201、绿色子像素202和蓝色子像素203，液晶显示器200显示插黑帧。
具体来说，开关元件21为N型MOS管，开关元件21的第一端、第二端和第三端分别为N型MOS管的栅极、漏极和源极。第一控制信号为低电平信号，第二控制信号为高电平信号，第一控制信号和第二控制信号交替出现。
当第一控制信号也即低电平信号施加至N型MOS管的栅极后，N型MOS管的漏极和源极截止，红色扫描线Gr、绿色扫描线Gg和蓝色扫描线Gb上的扫描信号分时有效以使驱动芯片22输出的灰阶电压信号分时通过数据线S1、…Sm施加至对应的红色子像素201、绿色子像素202和蓝色子像素203，液晶显示器200显示正常图像帧。当第二控制信号也即高电平信号施加至N型MOS管的栅极后，N型MOS管的漏极和源极导通，驱动芯片22向N型MOS管的源极输出参考电压信号VCOM的同时驱动芯片22停止向数据线S1、…Sm输出灰阶电压信号，此时红色扫描线Gr、绿色扫描线Gg和蓝色扫描线Gb上的扫描信号同时有效，参考电压信号VCOM经过N型MOS管的漏极、源极后经数据线S1、…Sm同时施加至对应的红色子像素201、绿色子像素202和蓝色子像素203，从而使得液晶显示器200显示插黑帧。
其中，第一控制信号和第二控制信号交替出现使得正常图像帧和插黑帧交替显示，从而可以解决3D显示中串扰的问题或者液晶显示器中由于低刷新率而导致拖影严重的问题。
在本实施例中，参考电压信号VCOM为驱动芯片22输出的信号。在其它实施例中，参考电压信号VCOM也可以为施加在液晶显示器200的公共电极上（未图示）的公共电压信号。
其中，本实施例中的液晶显示器200为应用于小尺寸手机、平板电脑的小尺寸液晶显示器。
图5是图4所示的液晶显示器的控制方法的流程图。如图5所示，该方法包括步骤：
步骤S201：由第一控制信号控制开关元件截止，由扫描信号控制灰阶电压信号通过数据线分时施加至对应的红色子像素、绿色子像素和蓝色子像素，液晶显示器显示正常图像帧。
在步骤S201中，当开关元件为N型MOS管，第一控制信号为低电平信号，第一控制信号施加在开关元件的第一端也即N型MOS管的栅极，从而使得开关元件的第二端和第三端截止也即N型MOS管的源极和漏极截止，红色扫描线、绿色扫描线和蓝色扫描线上的扫描信号分时有效以使驱动芯片输出的灰阶电压信号分时通过数据线施加至对应的红色子像素、绿色子像素和蓝色子像素，液晶显示器显示正常图像帧。
本领域技术人员可以理解，在其它实施例中，开关元件也可以为不同于N型MOS管的其它开关元件，例如NPN三极管，只要其在控制信号的控制下，能实现截止和导通的功能即可。
步骤S202：由第二控制信号控制开关元件导通，由扫描信号控制参考电压信号通过数据线同时施加至对应的红色子像素、绿色子像素和蓝色子像素，液晶显示器显示插黑帧。
在步骤S202中，第二控制信号也即高电平信号施加在开关元件的第一端也即N型MOS管的栅极，从而使得开关元件的第二端和第三端导通也即N型MOS管的源极和漏极导通，此时红色扫描线、绿色扫描线和蓝色扫描线上的扫描信号同时有效，参考电压信号经过N型MOS管的漏极、源极后经数据线同时施加至对应的红色子像素、绿色子像素和蓝色子像素，从而使得液晶显示器显示插黑帧。
其中步骤S201和步骤S202重复操作，使得液晶显示器交替显示正常图像帧和插黑帧。
请一并参考图6，图6是图5所示的液晶显示器的控制方法的信号时序图。如图6所示，T轴表示时间轴、V轴表示电压轴。其中，0到T1为显示第一帧图像帧（Frame1）的时间、T1到T2为显示第一帧插黑帧（Black1）的时间、T2到T3为显示第二帧图像帧（Frame2）的时间、T3到T4为显示第二帧插黑帧（Black2）的时间。
Gr表示施加在红色扫描线上的扫描信号的时序，Gg表示施加在绿色扫描线上的扫描信号的时序，Gb表示施加在蓝色扫描线上的扫描信号的时序，BLACK表示施加在开关元件的第一端也即N型MOS管的栅极的控制信号的时序，S(2n-1)表示施加在第2n-1条数据线上信号的时序，S(2n)表示施加在第2n条数据线上信号的时序。
在0~T1的时间间隔内，Gr、Gg和Gb上施加的扫描信号分时有效，也即Gr、Gg和Gb上施加的扫描信号分时为高电平信号，优选地，Gr、Gg和Gb上扫描信号处于高电平所持续的时间相同。BLACK上施加第一控制信号也即低电平信号VGL，S(2n-1)和S(2n)上施加灰阶电压信号，其中，S(2n-1)和S(2n)上施加的灰阶电压信号极性相反，液晶显示器200显示第一帧图像帧。
在T1~T2的时间间隔内，Gr、Gg和Gb上施加的扫描信号同时有效，也即Gr、Gg和Gb上施加的扫描信号同时为高电平信号。BLACK上施加第二控制信号也即高电平信号VGH，S(2n-1)和S(2n)上施加参考电压信号VCOM，液晶显示器200显示第一帧插黑帧。
在T2~T3的时间间隔内，Gr、Gg和Gb上施加的扫描信号分时有效，BLACK上施加第一控制信号也即低电平信号VGL，S(2n-1)和S(2n)上施加灰阶电压信号，其中，S(2n-1)和S(2n)上施加的灰阶电压信号极性相反，液晶显示器200显示第二帧图像帧。另外，在S(2n-1)或S(2n)上，第一帧图像帧对应的灰阶电压信号和第二帧图像帧对应的灰阶电压信号极性相反。
在T3~T4的时间间隔内，Gr、Gg和Gb上施加的扫描信号同时有效，BLACK上施加第二控制信号也即高电平信号VGH，S(2n-1)和S(2n)上施加参考电压信号VCOM，液晶显示器200显示第二帧插黑帧。
后续Gr、Gg、Gb、BLACK、S(2n-1)和S(2n)上的时序按照0~T4时间间隔内所显示的时序重复出现，从而使得正常图像帧和插黑帧交替显示。
本发明的有益效果是：本发明的液晶显示器及其控制方法通过控制开关元件截止使得灰阶电压信号通过数据线施加至对应的像素单元，进而使得液晶显示器显示正常图像帧；以及通过控制开关元件导通使得参考电压信号通过数据线施加至对应的像素单元，进而使得液晶显示器显示插黑帧。通过上述方式，本发明能够以相对简单以及节能的方式实现插黑帧，从而解决3D显示中串扰的问题或者液晶显示器中由于低刷新率而导致拖影严重的问题。
以上所述仅为本发明的实施方式，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (15)

  1. 一种液晶显示器，包括：多条数据线、多条扫描线和多个像素单元，其中，每个像素单元连接其对应的一条数据线和一条扫描线，其中，所述液晶显示器还包括多个开关元件，每个所述开关元件的第一端连接在一起用以接收控制信号，每个所述开关元件的第二端连接在一起用以接收参考电压信号，每个所述开关元件的第三端连接其对应的一条数据线；
    其中，当所述控制信号为第一控制信号时，所述开关元件截止以使灰阶电压信号通过所述数据线施加至对应的所述像素单元，所述液晶显示器显示正常图像帧；当所述控制信号为第二控制信号时，所述开关元件导通以使所述参考电压信号通过所述数据线施加至对应的所述像素单元，所述液晶显示器显示插黑帧；
    其中，所述开关元件为N型MOS管，所述开关元件的所述第一端、第二端和第三端分别为所述MOS管的栅极、漏极和源极；
    其中，所述参考电压信号为施加于所述液晶显示器的公共电极上的公共电压信号。
  2. 根据权利要求1所述的液晶显示器，其中，每个所述像素单元包括红色子像素、绿色子像素和蓝色子像素，每条所述扫描线包括红色扫描线、绿色扫描线和蓝色扫描线，所述红色子像素、绿色子像素和蓝色子像素连接其对应的所述红色扫描线、绿色扫描线和蓝色扫描线，所述红色子像素、绿色子像素、蓝色子像素连接对应的同一条所述数据线；
    其中，当所述控制信号为所述第一控制信号时，所述红色扫描线、绿色扫描线和蓝色扫描线上的扫描信号分时有效以使所述灰阶电压信号分时通过所述数据线施加至对应的所述红色子像素、绿色子像素和蓝色子像素；当所述控制信号为所述第二控制信号时，所述红色扫描线、绿色扫描线和蓝色扫描线上的所述扫描信号同时有效以使所述参考电压信号通过所述数据线同时施加至对应的所述红色子像素、绿色子像素和蓝色子像素。
  3. 根据权利要求1所述的液晶显示器，其中，所述第一控制信号为低电平信号，所述第二控制信号为高电平信号，所述第一控制信号和所述第二控制信号交替出现。
  4. 根据权利要求1所述的液晶显示器，其中，所述液晶显示器进一步包括驱动芯片，每个所述开关元件的所述第一端、第二端分别与所述驱动芯片连接，每个所述开关元件的所述第一端用以接收所述驱动芯片输出的所述控制信号，所述第二端用以接收所述驱动芯片输出的所述参考电压信号。
  5. 根据权利要求1所述的液晶显示器，其中，所述液晶显示器进一步包括时序控制器、印刷电路板和覆晶薄膜，每个所述开关元件的所述第一端经所述覆晶薄膜、所述印刷电路板与所述时序控制器连接，用以接收所述时序控制器输出的所述控制信号，每个所述开关元件的所述第二端与所述覆晶薄膜中的所述参考电压信号相连。
  6. 一种液晶显示器，包括：多条数据线、多条扫描线和多个像素单元，其中，每个像素单元连接其对应的一条数据线和一条扫描线，其中，所述液晶显示器还包括多个开关元件，每个所述开关元件的第一端连接在一起用以接收控制信号，每个所述开关元件的第二端连接在一起用以接收参考电压信号，每个所述开关元件的第三端连接其对应的一条数据线；
    其中，当所述控制信号为第一控制信号时，所述开关元件截止以使灰阶电压信号通过所述数据线施加至对应的所述像素单元，所述液晶显示器显示正常图像帧；当所述控制信号为第二控制信号时，所述开关元件导通以使所述参考电压信号通过所述数据线施加至对应的所述像素单元，所述液晶显示器显示插黑帧。
  7. 根据权利要求6所述的液晶显示器，其中，每个所述像素单元包括红色子像素、绿色子像素和蓝色子像素，每条所述扫描线包括红色扫描线、绿色扫描线和蓝色扫描线，所述红色子像素、绿色子像素和蓝色子像素连接其对应的所述红色扫描线、绿色扫描线和蓝色扫描线，所述红色子像素、绿色子像素、蓝色子像素连接对应的同一条所述数据线；
    其中，当所述控制信号为所述第一控制信号时，所述红色扫描线、绿色扫描线和蓝色扫描线上的扫描信号分时有效以使所述灰阶电压信号分时通过所述数据线施加至对应的所述红色子像素、绿色子像素和蓝色子像素；当所述控制信号为所述第二控制信号时，所述红色扫描线、绿色扫描线和蓝色扫描线上的所述扫描信号同时有效以使所述参考电压信号通过所述数据线同时施加至对应的所述红色子像素、绿色子像素和蓝色子像素。
  8. 根据权利要求6所述的液晶显示器，其中，所述开关元件为N型MOS管，所述开关元件的所述第一端、第二端和第三端分别为所述MOS管的栅极、漏极和源极。
  9. 根据权利要求8所述的液晶显示器，其中，所述第一控制信号为低电平信号，所述第二控制信号为高电平信号，所述第一控制信号和所述第二控制信号交替出现。
  10. 根据权利要求6所述的液晶显示器，其中，所述液晶显示器进一步包括驱动芯片，每个所述开关元件的所述第一端、第二端分别与所述驱动芯片连接，每个所述开关元件的所述第一端用以接收所述驱动芯片输出的所述控制信号，所述第二端用以接收所述驱动芯片输出的所述参考电压信号。
  11. 根据权利要求6所述的液晶显示器，其中，所述液晶显示器进一步包括时序控制器、印刷电路板和覆晶薄膜，每个所述开关元件的所述第一端经所述覆晶薄膜、所述印刷电路板与所述时序控制器连接，用以接收所述时序控制器输出的所述控制信号，每个所述开关元件的所述第二端与所述覆晶薄膜中的所述参考电压信号相连。
  12. 根据权利要求6所述的液晶显示器，其中，所述参考电压信号为施加于所述液晶显示器的公共电极上的公共电压信号。
  13. 一种液晶显示器的控制方法，其中，所述控制方法包括：
    由第一控制信号控制开关元件截止，进而使得灰阶电压信号通过数据线施加至对应的像素单元，所述液晶显示器显示正常图像帧；
    由第二控制信号控制所述开关元件导通，进而使得参考电压信号通过所述数据线施加至对应的所述像素单元，所述液晶显示器显示插黑帧。
  14. 根据权利要求13所述的控制方法，其中，所述像素单元包括红色子像素、绿色子像素和蓝色子像素，所述控制方法进一步包括：
    由扫描信号控制所述灰阶电压信号通过数据线分时施加至对应的所述红色子像素、绿色子像素和蓝色子像素；以及
    由所述扫描信号控制所述参考电压信号通过数据线同时施加至对应的所述红色子像素、绿色子像素和蓝色子像素。
  15. 根据权利要求13所述的控制方法，其中，相邻的所述正常图像帧对应的所述灰阶电压信号极性相反。
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