WO2007119454A1 - 表示装置およびカラーフィルタ基板 - Google Patents
表示装置およびカラーフィルタ基板 Download PDFInfo
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- WO2007119454A1 WO2007119454A1 PCT/JP2007/055698 JP2007055698W WO2007119454A1 WO 2007119454 A1 WO2007119454 A1 WO 2007119454A1 JP 2007055698 W JP2007055698 W JP 2007055698W WO 2007119454 A1 WO2007119454 A1 WO 2007119454A1
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/201—Filters in the form of arrays
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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
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
-
- 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
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/13606—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit having means for reducing parasitic capacitance
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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
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/40—Arrangements for improving the aperture ratio
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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
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/52—RGB geometrical arrangements
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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
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/04—Structural and physical details of display devices
- G09G2300/0421—Structural details of the set of electrodes
- G09G2300/0426—Layout of electrodes and connections
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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
- 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
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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
- 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
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0219—Reducing feedthrough effects in active matrix panels, i.e. voltage changes on the scan electrode influencing the pixel voltage due to capacitive coupling
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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
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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
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3614—Control of polarity reversal in general
Definitions
- the present invention relates to a display device, and relates to a display device that performs display using a display region including at least a plurality of pixels.
- Color display devices such as color televisions and color monitors usually perform color expression by additively mixing the three primary colors (RGB3 primary colors) of red (R), green (G), and blue (B)! / Speak.
- RGB3 primary colors red
- G green
- B blue
- Each display unit of the color display device (sometimes referred to as a “color display pixel” in this specification) includes a red pixel, a green pixel, and a blue pixel respectively corresponding to the RGB3 primary colors.
- Various colors are expressed by changing the brightness of the green and blue pixels.
- the luminance of each pixel is a force that changes within the range from the minimum gradation (for example, gradation 0) to the maximum gradation (for example, gradation 255) of each pixel.
- the luminance of the pixel at the key is expressed as “0.0”, and the luminance of the pixel at the maximum gradation of the pixel is expressed as “1.0”.
- Patent Document 1 Japanese Patent Laid-Open No. 2005-62869
- FIG. 13 is a view of a part of an active matrix substrate in a color display device using an active matrix system, as viewed from a direction perpendicular to the substrate.
- an active matrix liquid crystal display LCD
- This LCD uses normally white mode (white display when no voltage is applied to the liquid crystal).
- a scanning line (gate line) 102 and a signal line (data line) 104 are arranged so as to intersect each other on a TFT (Thin Film Transistor) substrate 101.
- a pixel electrode 106 is formed in each region surrounded by the scanning line 102 and the signal line 104.
- Each of the pixel electrodes 106 corresponds to one pixel 108, and a plurality of pixels 108 arranged in a matrix form constitute an LCD display area.
- a region surrounded by the center line of two adjacent scanning lines and the center line of two adjacent signal lines is called a pixel.
- FIG. 14 is a diagram showing the configuration of an arbitrary pixel 108A in the display area.
- a color filter substrate 116 including a counter electrode 112 and a color filter 114 is disposed on the active matrix substrate 101 with a liquid crystal layer 110 interposed therebetween.
- the orientation of the liquid crystal in each pixel is controlled, thereby changing the light transmittance of each pixel and performing color display.
- the color filter substrate 116 is further formed with a BM (black matrix) 118 for blocking light leakage.
- the BM has an opening 119A above the pixel electrode 106A, and a region excluding the light shielding portion by the wiring on the TFT substrate from the opening 119A is a light transmission region in the pixel 108A.
- the TFT 120A as a switching element is formed in the pixel 108A.
- the gate 122A of the TFT 120A is electrically connected to the scanning line 102
- the source 124A is electrically connected to the signal line 104A
- the drain 126A is electrically connected to the pixel electrode 106A.
- the gate 122B of the TFT 120B is connected to the scanning line 102A
- the source 124B is connected to the signal line 104B
- the drain 126B is connected to the pixel electrode 106B. Electrically connected.
- red, green, and blue pixels are continuously arranged, for example, along a gate line, and one display unit is formed by these three pixels.
- red, green, blue, and white pixels are arranged continuously along the gate line, for example, and one display unit is formed by these four pixels.
- a parasitic capacitance Csdl is formed between the signal line 104A connected to the source 124A of the TFT 120A and the pixel electrode 106A.
- a parasitic capacitance Csd2 is formed between the signal line 104B connected to the pixel electrode 106B of the pixel 108B adjacent to the pixel 108A and the pixel electrode 106A.
- a scanning signal and a display signal are supplied to the scanning line 102 and the signal line 104, for example, by line inversion driving.
- the display signal is supplied by frame inversion in which the polarity is inverted every frame.
- FIG. 15 is a diagram showing the polarity of the display signal by line inversion driving. As shown in this figure, in one frame, a positive voltage and a negative voltage are alternately supplied to the pixel electrode for each pixel row. When a positive voltage is supplied to each pixel electrode in a row of a pixel, a negative voltage is supplied to each pixel electrode in the next row (next stage) of that row (own stage).
- FIG. 16 is a diagram showing a waveform of the voltage (TFT drain potential) of the pixel electrode (pixel electrode 106A in FIG. 14) when line inversion driving is performed.
- the gate potential Vg is supplied to the TFT 120A of the pixel 108A, and the gate 122A is turned ON.
- the drain potential Vd rises to near the source potential Vs.
- the gate 122A is turned off, the drain potential Vd to be maintained is lowered by the feedthrough voltage AVd.
- the feedthrough voltage AVd is determined by the following equation using the gate-drain capacitance Cgd, the liquid crystal capacitance Clc, the auxiliary capacitance Ccs, and the difference Vgpp between the maximum value and the minimum value of the gate voltage.
- AVsd Cgd / (Cgd + Clc + Ccs + Csd) XVgpp
- Vsd Csd / (Cgd + Clc + Ccs + Csd) X AVs
- FIG. 17 is a diagram for explaining shadowing in the normally white mode.
- This figure shows a display screen when, for example, a black square (area A) is displayed at the center of the display area of the LCD 100.
- Region B is a display region above and below region A (the vertical direction in FIG. 15 is the vertical direction), and is essentially a brighter color than region A, as is region C, which is the left and right display region of region A This is an area in which (for example, light gray) should be displayed.
- the effective value of the drain potential Vd of the pixel in the region B is increased.
- the gradation of the region B is lowered, and the force applied to the region B is also the black square displayed in the region A. An image appears as if it was a shadow.
- FIG. 18 is a diagram for explaining dot inversion driving.
- dot inversion driving signal potentials having different polarities are supplied to pixels adjacent in the row direction and the column direction. Therefore, the effects of parasitic capacitances Csdl and Csd 2 on the drain potential cancel each other, and the shadowing phenomenon is almost impossible. It will no longer occur. Therefore, dot inversion is widely used in fields such as notebook personal computers and TV liquid crystals where display quality is important.
- block division occurs not only in dot inversion display devices but also in line inversion display devices. Block division can also occur due to partial differences in the finish in each manufacturing process of the display device.
- the present invention has been made in view of the above problems, and an object thereof is to provide a display device with high display quality.
- the display device of the present invention is a display device having a plurality of pixels, each of which is connected to a plurality of pixel electrodes corresponding to the plurality of pixels and the plurality of pixel electrodes via a switching element.
- a plurality of signal lines, and the plurality of pixel electrodes are first pixel electrodes.
- the second pixel electrode, wherein the plurality of signal lines include a first signal line connected to the first pixel electrode and a second signal line connected to the second pixel electrode.
- the distance between the end of the pixel electrode and the center line of the first signal line is greater than the distance between the end of the second pixel electrode and the center line of the second signal line, or the first The distance between the end of the pixel electrode and the center line of the signal line adjacent to the first signal line across the first pixel electrode is the distance between the end of the second pixel electrode and the second pixel electrode. Larger than the distance between the center line of the signal lines adjacent to the second signal line! /.
- the display device of the present invention is a display device having a plurality of pixels, each of which is connected to a plurality of pixel electrodes corresponding to the plurality of pixels and the plurality of pixel electrodes via a switching element.
- a plurality of signal lines wherein the plurality of pixel electrodes include a first pixel electrode and a second pixel electrode, and the plurality of signal lines include a first signal line connected to the first pixel electrode;
- a second signal line connected to the second pixel electrode, a shield electrode is formed below the first signal line side of the first pixel electrode, and the second pixel electrode 2
- No shield electrode is formed below the signal line side, or a shield electrode is formed below the signal line side adjacent to the first signal line with the first pixel electrode sandwiched between the first pixel electrodes. Formed between the second pixel electrode and the second pixel electrode. No shield electrode is formed below the signal line adjacent to the second signal line.
- the display device of the present invention is a display device having a plurality of pixels, each of which is connected to a plurality of pixel electrodes corresponding to the plurality of pixels and the plurality of pixel electrodes via switching elements.
- a plurality of signal lines wherein the plurality of pixel electrodes include a first pixel electrode and a second pixel electrode, and the plurality of signal lines include a first signal line connected to the first pixel electrode;
- the shield electrode below the second signal line side does not protrude from the second pixel electrode, or is adjacent to the first signal line across the first pixel electrode of the first pixel electrode
- the shield electrode below the side is the first pixel. And protrudes from the electrode, the first across the second pixel electrode of the second pixel electrode The shield electrode below the signal line adjacent to the two signal lines does not protrude from
- the display device of the present invention is a display device having a plurality of pixels, and is connected to the plurality of pixel electrodes corresponding to the plurality of pixels and the plurality of pixel electrodes via switching elements, respectively.
- a plurality of signal lines wherein the plurality of pixel electrodes include a first pixel electrode and a second pixel electrode, and the plurality of signal lines include a first signal line connected to the first pixel electrode;
- a shield electrode under the first signal line side of the first pixel electrode is connected to a scanning line or an auxiliary capacitance line, and includes a second signal line connected to the second pixel electrode.
- the shield electrode below the second signal line side of the second pixel electrode is not connected to the scanning line or the auxiliary capacitance line, or the first pixel electrode of the first pixel electrode is sandwiched between the first pixel electrode and the first pixel electrode. Shield under the signal line side adjacent to the signal line The pole is connected to a scanning line or an auxiliary capacitance line, and the shield electrode below the signal line adjacent to the second signal line across the second pixel electrode of the second pixel electrode is a scanning line. Connected to the line or auxiliary capacitance line.
- the plurality of pixels include pixels that display a plurality of different colors, and the Y value in the XYZ chromaticity display of the first pixel electrode is the value of the second pixel electrode. Greater than Y value.
- the aperture ratio of the pixel including the first pixel electrode is substantially equal to the aperture ratio of the pixel including the second pixel electrode.
- the plurality of pixels include pixels that display a plurality of different colors, and the first pixel electrode and the second pixel electrode are included in one repeating unit of the plurality of colors. including.
- the Y value in the XYZ chromaticity display of the first pixel electrode is the first pixel electrode.
- the aperture ratios of all the pixels in one repeating unit of the plurality of colors are substantially equal.
- the pixel structure has a first pixel structure corresponding to the first pixel electrode.
- the color displayed by the pixel having the first pixel structure is only one color in one repeating unit of the plurality of colors.
- the pixel having the first pixel structure is a pixel corresponding to the color having the highest Y value in the XYZ chromaticity display among the plurality of colors.
- the plurality of pixels include a red pixel that displays red, a green pixel that displays green, and a blue pixel that displays blue, and the first pixel structure is the same.
- the pixel possessed is the pixel of the green pixel.
- the plurality of pixels includes a red pixel that displays red, a green pixel that displays green, a blue pixel that displays blue, and a white pixel that displays white.
- the pixel having the first pixel structure is a pixel of the white pixel.
- a first black matrix having a predetermined width and extending in the same direction as the first signal line is formed above the first signal line, and is formed above the second signal line.
- a second black matrix having a predetermined width and extending in the same direction as the second signal line is formed on the side, and a center line of the first signal line and the first pixel electrode of the first black matrix are formed.
- Dl (1) the distance between the center line of the second signal line and the second pixel electrode side edge of the second black matrix, D1 (2).
- D1 (2) A center line of a signal line adjacent to the first signal line across the first pixel electrode, and a black matrix adjacent to the first black matrix across the first pixel electrode on the first pixel electrode side.
- D2 (l) between the edges and the second pixel electrode across the second pixel electrode D2 (2) is the distance between the center line of the signal line adjacent to the signal line and the end on the second pixel electrode side of the black matrix adjacent to the second black matrix across the second pixel electrode.
- the pixel structure includes a first pixel structure corresponding to the first pixel electrode, and The color displayed by the pixel having the first pixel structure including the second pixel structure corresponding to the second pixel electrode is present in two or more colors in one repeating unit of the plurality of colors.
- the pixel having the first pixel structure includes a pixel corresponding to the highest color of the Y value in the XYZ chromaticity display among the plurality of colors.
- the plurality of pixels includes a red pixel that displays red, a green pixel that displays green, a blue pixel that displays blue, and a white pixel that displays white.
- the pixels having the first pixel structure are the white pixel and the green pixel.
- a first black matrix having a predetermined width and extending in the same direction as the first signal line is formed above the first signal line.
- a second black matrix having a predetermined width and extending in the same direction as the second signal line is formed on the side, and a center line of the first signal line and the first pixel electrode of the first black matrix are formed.
- Dl (1) the distance between the center line of the second signal line and the second pixel electrode side edge of the second black matrix, D1 (2).
- D1 (2) A center line of a signal line adjacent to the first signal line across the first pixel electrode, and a black matrix adjacent to the first black matrix across the first pixel electrode on the first pixel electrode side.
- D2 (l) between the edges and the second pixel electrode across the second pixel electrode D2 (2) is the distance between the center line of the signal line adjacent to the signal line and the end on the second pixel electrode side of the black matrix adjacent to the second black matrix across the second pixel electrode.
- the display device of the present invention is a display device having a plurality of pixels arranged in a matrix form, each of the plurality of pixel electrodes corresponding to the plurality of pixels and the plurality of pixel electrodes.
- a plurality of signal lines extending in the column direction of the matrix connected via switching elements, the plurality of pixel electrodes including a first pixel electrode and a second pixel electrode, and the plurality of signal lines are A first signal line connected to the first pixel electrode and a second signal line connected to the second pixel electrode are formed between the first pixel electrode and the first signal line.
- a capacitance is smaller than a capacitance formed between the second pixel electrode and the second signal line, or is adjacent to the first signal line with the first pixel electrode and the first pixel electrode interposed therebetween.
- a capacitor formed between the signal line and the second pixel electrode The capacitance is smaller than the capacity formed between the second signal line and the signal line adjacent to the second pixel electrode.
- the display device of the present invention is a display device having a plurality of pixels arranged in the form of a matrix, and includes a plurality of pixel electrodes corresponding to the plurality of pixels and the plurality of pixel electrodes.
- a plurality of signal lines extending in the column direction of the matrix, each connected via a switching element, the plurality of pixel electrodes including a first pixel electrode and a second pixel electrode, and the plurality of signals
- the line includes a first signal line connected to the first pixel electrode and a second signal line connected to the second pixel electrode, and the line is between the first pixel electrode and the first signal line.
- the value obtained by dividing the capacitance formed by the total capacitance formed for the first pixel electrode is the capacitance formed between the second pixel electrode and the second signal line. Or a capacitance formed between the first pixel electrode and a signal line adjacent to the first signal line across the first pixel electrode. Divided by the total capacitance formed for the first pixel electrode, the second pixel electrode The smaller than a value obtained by dividing the total capacitance formed with respect to the second pixel electrode capacity formed between the second pixel electrode interposed therebetween adjacent signal lines in the second signal line.
- the plurality of pixels include pixels that display a plurality of different colors, and the Y value in the XYZ chromaticity display of the first pixel electrode is the Y value of the second pixel electrode. Greater than the value.
- an aperture ratio of a pixel including the first pixel electrode is substantially equal to an aperture ratio of a pixel including the second pixel electrode.
- the plurality of pixels include pixels that display a plurality of different colors, and the first pixel electrode and the second pixel are included in one repeating unit of the plurality of colors. Includes pixel electrodes.
- the Y value in the XYZ chromaticity display of the first pixel electrode is the first pixel electrode.
- the aperture ratio power of all pixels in one repeating unit of the plurality of colors is substantially equal.
- the pixel electrode includes an m-th pixel electrode of the m-th pixel structure
- the plurality of signal lines include an m-th signal line connected to the m-th pixel electrode
- the capacitance formed between the mth pixel electrode and the mth signal line is Csdl (m)
- Csd2 (m) When the capacitance formed between the m pixel electrode and the signal line adjacent to the mth signal line across the mth pixel electrode
- the pixel having the first pixel structure is a pixel corresponding to the color having the highest Y value in the XYZ chromaticity display among the plurality of colors.
- the plurality of pixels include a red pixel that displays red, a green pixel that displays green, and a blue pixel that displays blue, and the first pixel structure is the same.
- the pixel possessed is the pixel of the green pixel.
- the plurality of pixels include a red pixel that displays red, a green pixel that displays green, a blue pixel that displays blue, and a white pixel that displays white.
- the pixel having the first pixel structure is the pixel of the white pixel.
- the distance between the center line of the mth signal line and the end of the mth black matrix on the mth pixel electrode side is Dl (m)
- the signal adjacent to the mth signal line across the mth pixel electrode is D2 (m)
- a corresponding mth pixel structure the pixel electrode includes an mth pixel electrode of the mth pixel structure, and the plurality of signal lines include an mth signal line connected to the mth pixel electrode.
- Csdl (m) represents a capacitance formed between the mth pixel electrode and the mth signal line, and a signal line adjacent to the mth signal line with the mth pixel electrode and the mth pixel electrode interposed therebetween. Is defined as Csd2 (m),
- the plurality of pixels include a red pixel that displays red, a green pixel that displays green, and a blue pixel that displays blue, and the first pixel electrode,
- the second pixel electrode and the third pixel electrode are a pixel electrode of the green pixel, a pixel electrode of the red pixel, and a pixel electrode of the blue pixel, respectively.
- the plurality of pixels include a red pixel that displays red, a green pixel that displays green, a blue pixel that displays blue, and a white pixel that displays white.
- the first pixel electrode, the second pixel electrode, the third pixel electrode, and the fourth pixel electrode are respectively a pixel electrode for the white pixel, a pixel electrode for the green pixel, and a pixel electrode for the red pixel.
- the distance between the center line of the mth signal line and the end of the mth black matrix on the mth pixel electrode side is Dl (m)
- the mth pixel electrode is adjacent to the mth signal line.
- the color filter substrate of the present invention is a color filter substrate of a display device including a display area constituted by a plurality of pixels, the plurality of pixel areas respectively corresponding to the plurality of pixels, and the plurality of pixels A plurality of black matrixes formed on the boundary line of the pixel region, the plurality of pixel regions including a pixel region displaying a plurality of different colors, and in one repeating unit of the plurality of different colors,
- the plurality of black matrices include a first black matrix and a second black matrix, and the width of the first black matrix is wider than the width of the second black matrix.
- a pixel region having the highest luminance among the plurality of different colors is adjacent to the first black matrix.
- all the aperture ratios of the plurality of pixel regions are substantially equal.
- a high-quality display device with display quality is provided.
- FIG. 1 is a cross-sectional view showing a display device of Embodiment 1.
- FIG. 2 is a diagram schematically showing a wiring structure of an electrode layer in the display device of Embodiment 1.
- FIG. 3 is a diagram showing a color display pixel of Embodiment 1, wherein (a) is a plan view schematically showing the color display pixel, and (b) is a signal line, a pixel electrode, CF, and a color display pixel. It is sectional drawing showing the structure of BM.
- FIG. 4 is a diagram showing a color display pixel of Embodiment 2, wherein (a) is a plan view schematically showing the color display pixel, and (b) is a signal line, a pixel electrode, CF, and a color display pixel. It is sectional drawing showing the structure of BM.
- FIG. 5 is a diagram showing a color display pixel of Embodiment 3, wherein (a) is a plan view schematically showing the color display pixel, and (b) is a signal line, a pixel electrode, CF, and a color display pixel.
- B 2 is a cross-sectional view illustrating a configuration of M.
- FIG. 6 is a plan view schematically showing a color display pixel of Embodiment 4.
- FIG. 8 A diagram showing a modification of Embodiment 5, wherein (a) is a plan view schematically showing a color display pixel of the first modification, and (b) is a color display pixel of the second modification. It is a top view typically expressed.
- FIG. 9C is a plan view schematically showing display pixels
- FIG. 10C is a plan view schematically showing color display pixels of a second modified example.
- FIG. 11 is a diagram for explaining a special polarity inversion drive that can be applied to the embodiment 7.
- FIG. 11 (a) shows the relationship between the source driver output and the signal line, and
- FIG. 11 (b) is supplied to the signal line.
- FIG. 12 is a diagram for explaining the effect obtained by the embodiment and its modification, wherein (a) shows the shadowing ratio and the aperture ratio with respect to the block division level, and (b) shows a special polarity inversion. It is the figure which showed the reduction rate of the shadowing at the time of using a drive.
- FIG. 13 is a plan view showing a part of an active matrix substrate in a display device.
- FIG. 14 is a diagram showing a configuration of one pixel in a display area of a display device.
- FIG. 15 A diagram showing the polarity of a display signal by line inversion driving in a display device.
- FIG. 16 is a diagram showing the potential of the pixel electrode when line inversion driving is performed.
- FIG. 17 is a diagram for explaining shadowing.
- FIG. 18 is a diagram showing the polarity of a display signal by dot inversion driving in a conventional display device.
- FIG. 1 shows a schematic cross-sectional shape of the display device 10 of the present embodiment.
- the display device 10 is a TN liquid crystal display device (LCD) using an active matrix method, and is a SHA (Super High Aparture) type liquid crystal display device employing a normally white mode.
- the display device 10 is enclosed in a polarizing plate 11, an active matrix substrate 12, a color filter substrate (CF substrate) 14, a polarizing plate 15, and between the active matrix substrate 12 and the CF substrate 14.
- a liquid crystal layer 16 containing liquid crystal is provided.
- the active matrix substrate 12 includes a glass substrate 22, an electrode layer 23, and an alignment film 24.
- the electrode layer 23 includes a pixel electrode 25, a TFT 26 (shown in FIG. 2), a signal line 27, and a scanning line 28 (shown in FIG. 2).
- the CF substrate 14 includes a glass substrate 32, a color filter layer (CF layer) 33, a transparent electrode 34, and an alignment film 35.
- the CF layer 33 includes a red color filter (red CF) 36R and a green color filter (green). CF) 36G, blue color filter (blue CF) 36B, and black matrix (BM) 39.
- FIG. 2 is a diagram schematically showing the wiring structure of the electrode layer 23 of the display device 10.
- the electrode layer 23 in the electrode layer 23, the plurality of signal lines 27 and the scanning lines 28 are arranged so as to cross each other, and the pixel electrodes 25 are arranged in a matrix form in a region surrounded by the signal lines 27 and the scanning lines 28. It has been.
- Scan signals are supplied to the scan lines 28 in a line sequential manner from the scan drive circuit, and display signals to be supplied to the pixel electrodes 25 are supplied to the signal lines 27 from the signal drive circuit.
- the pixel electrode 25 serves as a signal storage capacitor that holds a signal supplied from the signal line 27.
- the liquid crystal 13 of each pixel is excited by the signal accumulated in the pixel electrode 25 until the next frame is scanned.
- the signal line 27, the scanning line 28, and the pixel electrode 25 are connected to the source, gate, and drain of the TFT 26, respectively.
- the TFT 26 uses the signal from the scanning line 28 as a gate signal and the signal line 27 And the pixel electrode 25 have a function as a switching element for switching ON / OFF of a signal.
- FIG. 3 (a) is a plan view schematically showing display units (color display pixels) in the display area of the display device 10.
- FIG. 3 (b) shows the signal line 27, pixel electrode 25, red CF36R, green CF36G, blue CF36B, and BM39 shown in FIG. 3 (a) in a direction parallel to the substrate surface (FIG. 3 ( It is sectional drawing seen from the paper surface front direction of a).
- the components other than the pixel electrode 25, the signal line 27, the scanning line 28, the red CF36R, the green CF36G, the blue CF36B, and the black matrix 39 among the above-described components are not illustrated.
- Pixels for displaying red, green, and blue are referred to as red pixel R, green pixel G, and blue pixel B, respectively.
- the pixel electrodes 25 included in the red pixel R, the green pixel G, and the blue pixel B are referred to as the red pixel electrode 25R, the green pixel electrode 25G, and the blue pixel electrode 25B, respectively, and the red pixel electrode 25R, the green pixel electrode 25G,
- the signal lines 27 that supply signals to the blue pixel electrode 25B Called line 27R, green signal line 27G, and blue signal line 27B.
- one color display pixel is composed of a red pixel R, a green pixel G, and a blue pixel B.
- Such color display pixels are continuously arranged in the row direction and the column direction to form a display screen. Since the LCD of this embodiment is an SHA type LCD, the signal line 27 and the scanning line 28 are formed so as to overlap the peripheral portion of the adjacent pixel electrode 25.
- the green signal line 27G is at least partly extended so that at least part of the red signal line 27R extends between the red pixel electrode 25R and the blue pixel electrode 25B formed on the left side of the red pixel electrode 25R.
- the blue signal line 27B is at least partially formed on the left side of the blue pixel electrode 25B so that it extends between the green pixel electrode 25G and the red pixel electrode 25R formed on the left side.
- the green pixel electrodes 25G are arranged so as to extend from each other.
- the distance between the green pixel electrode 25G and the green signal line 27G is larger than the distance between the red pixel electrode 25R and the green signal line 27G.
- the distance is larger than the distance between the blue pixel electrode 25B and the green signal line 27B.
- the distance between the green pixel electrode 25G and the green signal line 27G and the blue signal line 27B adjacent to the green pixel electrode 25G is made larger than the distance between the pixel electrode 25 of another color and the signal line 27 adjacent thereto. Therefore, the parasitic capacitance Csdl (G) generated between the green pixel electrode 25G and the green signal line 27G is changed to the parasitic capacitance Csdl (R) generated between the red pixel electrode 25R and the red signal line 27R.
- the parasitic capacitance Csdl (B) generated between the blue pixel electrode 25B and the blue signal line 27B can be made smaller.
- the parasitic capacitance Csd2 (G) generated between the green pixel electrode 25G and the blue signal line 27B is the parasitic capacitance Csd2 (B) red pixel generated between the blue pixel electrode 25B and the red signal line 27R.
- the parasitic capacitance generated between electrode 2 5B and green signal line 27G is smaller than Csd2 (R)! /.
- Csdl Csd2 for all colors.
- the XYZ chromaticity display has the highest Y value and the color is green.
- the amount of lightness change for green which has the highest lightness (highest Y value or least color)
- the amount of lightness change for other colors can be made smaller than the amount of lightness change for other colors. it can. This makes it possible to display images that are less likely to cause shadowing in line inversion driving (or in which shadowing is not noticeable).
- the change ⁇ Csd of Csd of each color when a difference in wiring spacing between blocks occurs due to misalignment or the like in the manufacturing process of the display device has a relationship as shown in the following equation.
- the amount of lightness change for green which has the highest lightness, can be made smaller than the amount of lightness change for other colors, and the difference in lightness or tone between blocks on the display screen can be reduced. Can be suppressed. Therefore, particularly in dot inversion driving, it is possible to display a ⁇ (very conspicuous) display with very few blocks.
- the feedthrough voltage AVd in the pixels of each color is preferably equalized by adjusting the width of the auxiliary capacitor electrode.
- BM39 is located between red CF36R and green CF36G, between green CF36G and blue CF36B, and between blue CF36B and red CF36R. Is formed.
- the center of the width of BM39 formed between red CF36R and green CF36G is closer to green CF36G (green pixel electrode 25G side) than the center line of green signal line 27G.
- the center of the width of BM39 formed between green CF36G and blue CF36B (above signal line 27B) is located closer to green CF36G (green pixel electrode 25G side) than the center of blue signal line 27B.
- B located above each of the green signal line 27G and the blue signal line 27B The width of M39 is larger than the width of BM39 located above the red signal line 27R.
- the aperture ratio of each color of the red pixel, the green pixel, and the blue pixel is substantially equal. Therefore, it is possible to greatly suppress the occurrence of shadowing and block division while maintaining the aperture ratio in the display area of the display device and the expression range in the image expression.
- a modification of this embodiment is also possible in which the relationship between the parasitic capacitances Csd (G), Csd (R), and Csd (B) generated for each of the green pixel, the red pixel, and the blue pixel is as follows.
- red is the color with the second highest Y value (or brightness). Therefore, according to this modification, the parasitic capacitance Csd for a color having a higher Y value can be further reduced. This also makes it possible to realize a display device having a large aperture ratio and reduced shadowing and block division. Note that the arrangement order of the red pixels, green pixels, and blue pixels is not limited to that shown in FIG. 3, and these pixels may be arranged in other orders.
- FIG. 4A is a plan view schematically showing color display pixels in the second embodiment.
- Ma Fig. 4 (b) is a cross-sectional view of the signal line 27, pixel electrode 25, red CF36R, green CF36G blue CF36B, and BM39 shown in Fig. 4 (a) as seen from the direction parallel to the substrate surface. is there.
- the distance between the green pixel electrode 25G and the green signal line 27G is larger than the distance between the red pixel electrode 25R and the red signal line 27R. Larger than the distance between 25B and green signal line 27B.
- the distance between the green pixel electrode 25G and the blue signal line 27B is the same as the distance between the red pixel electrode 25R and the green signal line 27G and the distance between the blue pixel electrode 25B and the red signal line 27R.
- the arrangement of the other components is the same as in the first embodiment.
- the distance between the green pixel electrode 25G and the green signal line 27G is the same as the distance between the red pixel electrode 25R and the red signal line 27R and the distance between the blue pixel electrode 25B and the blue signal line 27B.
- the distance between the pixel electrode 25G and the blue signal line 27B may be larger than the distance between the red pixel electrode 25R and the green signal line 27G and the distance between the blue pixel electrode 25B and the red signal line 27R.
- the capacitance generated between the green pixel electrode 25G and the signal line adjacent to it is generated only on one side, and the capacitance generated between the pixel electrode of the other color and the signal line adjacent thereto. Can be kept smaller. Also in this embodiment, the aperture ratios of the respective colors are substantially equal.
- the present embodiment it is possible to suppress the occurrence of shadowing and block division while maintaining the aperture ratio in the display area and the expression range in the image expression large.
- the reduction in the aperture ratio of the display area can be further suppressed as compared with the first embodiment.
- FIG. 5A is a plan view schematically showing color display pixels in the third embodiment.
- Fig. 5 (b) is a cross-sectional view of the signal line 27, pixel electrode 25, red CF36R, green CF36G, blue CF36B, and BM39 shown in Fig. 5 (a) as seen from the direction parallel to the substrate surface.
- FIG. 5 (b) is a cross-sectional view of the signal line 27, pixel electrode 25, red CF36R, green CF36G, blue CF36B, and BM39 shown in Fig. 5 (a) as seen from the direction parallel to the substrate surface.
- Embodiments 1 and 2 are forces that were embodiments using SHA-type LCDs. Therefore, the signal line 27 and the scanning line 28 do not overlap the pixel electrode 25 when viewed from the direction perpendicular to the display device. In general, pixel electrodes and scanning lines do not overlap, and a black matrix in the horizontal direction is required to shield light between them.
- the distance between the green pixel electrode 25G and the green signal line 27G is, for example, larger than the distance between the red pixel electrode 25R and the red signal line 27R, and the green signal electrode 25G and the blue signal line.
- the distance between the line 27B is larger than the distance between the blue pixel electrode 25B and the red signal line 27R. Therefore, the magnitude relationship of the parasitic capacitance generated between the pixel electrode and the signal line is as follows, as in the first embodiment.
- the capacitance generated between the green pixel electrode 25G and the adjacent signal line is more than the capacitance generated between the pixel electrode of another color and the adjacent signal line.
- the aperture ratios of the respective colors are substantially equal.
- the distance between the green pixel electrode 25G and the green signal line 27G is made larger than the distance between the red pixel electrode 25R and the red signal line 27R, and the green pixel electrode 25G
- the distance between the blue signal line 27B is larger than the distance between the blue pixel electrode 25B and the red signal line 27R, but only the distance between the green pixel electrode 25G and the green signal line 27G is
- the distance between the electrode 25R and the red signal line 27R is larger than the distance between the green pixel electrode 25G and the blue signal line 27B, and the distance between the blue pixel electrode 25B and the red signal line 27R is the same. Also good.
- the green pixel electrode 25G and the blue signal line 27B is made larger than the distance between the blue pixel electrode 25B and the red signal line 27R, and the green pixel electrode 25G and the green signal line 27G The distance between may be the same as the distance between the red pixel electrode 25R and the red signal line 27R.
- FIG. 6 is a diagram schematically showing a color display pixel in the fourth embodiment. In this figure, only the pixel electrode 25 and the signal line 27 are shown, and the configuration of the scanning line 28 and the CF layer 33 is not shown.
- a double-line structure is applied to the red signal line 27R.
- the other points are the same as the configuration of the first embodiment.
- the center of the double line of the red signal line 27R having the double line structure is located at the center of the gap between the red pixel electrode 25R and the blue pixel electrode 25B.
- the distance between the green pixel electrode 25G and the green signal line 27G is the distance between the red pixel electrode 25R and the green signal line 27G.
- the distance between the green pixel electrode 25G and the green signal line 27B is larger than the distance between the blue pixel electrode 25B and the green signal line 27B. Therefore, the magnitude relationship of the parasitic capacitance generated between the pixel electrode and the signal line is as follows.
- the capacitance generated between the green pixel electrode 25G and the signal line adjacent thereto is larger than the capacitance generated between the pixel electrode of another color and the signal line adjacent thereto.
- the size can be reduced, and the occurrence of shadowing and block division can be suppressed.
- the signal line of the double-wire structure can suppress the influence of the variation in the parasitic capacitance Csd due to the alignment shift generated in the manufacturing process of the display device, as compared with the single-wire structure.
- the both sides of the green pixel electrode 25G are easily affected by the alignment shift and are used with single signal lines.
- the parasitic capacitance generated between these signal lines and the green pixel electrode is Therefore, the effect of misalignment on the brightness change of the green display is small.
- both the green signal line 27G and the blue signal line 27B have a single-wire structure.
- One of these may have a double-line structure similar to the red signal line 27R.
- FIG. 7A is a plan view schematically showing color display pixels in the fifth embodiment.
- the LCD of the present embodiment includes a shield electrode 50 disposed at both ends of the green pixel electrode 25G.
- the shield electrode is a conductor arranged at least partially overlapping the signal line 'pixel electrode or the pixel electrode, and is formed at the same time as the scanning line' auxiliary capacitor electrode.
- the red signal line 27R, the green signal line 27G, and the blue signal line 27B are the central force of the signal line, respectively, between the red pixel electrode 25R and the blue pixel electrode 25B, between the green pixel electrode 25G and the red pixel electrode 25R, and the blue pixel electrode. It is arranged so as to be positioned between 25B and the green pixel electrode 25G.
- FIG. 7B is a cross-sectional view of the signal line 27, the pixel electrode 25, and the shield electrode 50 shown in FIG. 7A viewed from a direction parallel to the surface of the substrate.
- the shield electrode 50 is located below the layer on which the signal line 27 is formed.
- the parasitic capacitance Csdl (G) formed between the green pixel electrode 25G and the green signal line 27G by the shield electrode is, for example, a parasitic capacitance formed between the red pixel electrode 25R and the red signal line 27R.
- the parasitic capacitance Csd2 (G) formed between the green pixel electrode 25G and the blue signal line 27B, which is smaller than the capacitance Csdl (R), is formed, for example, between the blue pixel electrode 25B and the red signal line 27R.
- the parasitic capacitance is smaller than Csd2 (B). Similar to the first embodiment, the magnitude relationship of the parasitic capacitance generated between the pixel electrode and the signal line is as follows.
- the capacitance generated between the green pixel electrode 25G and the adjacent signal line is more than the capacitance generated between the pixel electrode of another color and the adjacent signal line.
- the size can be reduced, and the occurrence of shadowing and block division can be suppressed.
- One shield electrode 50 may be formed at one end of the green pixel electrode 25G.
- FIG. 8 (a) is a plan view schematically showing color display pixels in the first modification example of the fifth embodiment.
- shield electrodes 50 are arranged at both ends of the red pixel electrode 25R, the green pixel electrode 25G, and the blue pixel electrode 25B.
- Each shield electrode 50 is located below the layer in which the signal line 27 is formed, as in the fifth embodiment.
- the shield electrodes 50 disposed at both ends of the green pixel electrode 25G protrude from the green pixel electrode 25G, whereas the shield electrodes 50 are disposed at both ends of the red pixel electrode 25R.
- the shield electrode 50 and the shield electrode 50 disposed at both ends of the blue pixel electrode 25B protrude from the red pixel electrode 25R and the blue electrode 25B, respectively.
- FIG. 8B is a plan view schematically showing color display pixels in the second modified example of the fifth embodiment.
- the shield electrodes 50 arranged at both ends of the green pixel electrode 25G cover up to the adjacent green signal line 27G and blue signal line 27B, whereas the red pixel electrode 25R has both ends.
- the shield electrode 50 and the shield electrode 50 arranged at both ends of the blue pixel electrode 25B should reach the adjacent signal lines.
- the parasitic capacitance Csdl (G) formed between the green pixel electrode 25G and the green signal line 27G is, for example, the red pixel electrode 25R and the red signal line.
- the parasitic capacitance Csd2 (G) formed between the green pixel electrode 25G and the blue signal line 27B which is smaller than the parasitic capacitance Csdl (R) formed between 27R and, for example, the blue pixel electrode 25B and the red signal line. It is smaller than the parasitic capacitance Csd2 (B) formed with 27R.
- the magnitude relationship of the parasitic capacitance generated between the pixel electrode and the signal line is the same as in the above-described embodiment.
- the capacitance generated between the green pixel electrode 25G and the signal line adjacent to the green pixel electrode 25G is changed to the capacitance generated between the pixel electrode of another color and the signal line adjacent thereto. It can be made smaller, and the occurrence of shadowing and block division can be suppressed.
- FIG. 9A is a plan view schematically showing color display pixels in the sixth embodiment.
- the auxiliary capacitor electrodes 55 arranged at both ends of the green pixel electrode 25G are used as the shield electrodes 50, whereas the shields arranged at both ends of the red pixel electrode 25R are used.
- the electrode 50 and the shield electrode 50 disposed at both ends of the blue pixel electrode 25B are floating islands.
- the shield electrode 50 connected to the auxiliary capacitance electrode 55 is formed in a shape extending upward from the auxiliary capacitance electrode 55 (square shape), but in a shape extending vertically (H shape). It may be formed.
- FIG. 9B is a plan view schematically showing color display pixels in the first modification example of the sixth embodiment.
- the shield electrode 50 on one side of the green pixel electrode 25G is connected to the auxiliary capacitor electrode 55, and the other has a floating island shape like the other colors.
- the shield electrode 50 connected to the auxiliary capacitance electrode 55 on one side of the green pixel electrode 25G is formed so as to extend upward from the auxiliary capacitance electrode 55 in this embodiment (square shape). You may form in the shape extended up and down.
- FIG. 9 (c) is a plan view schematically showing color display pixels in the second modification example of the sixth embodiment.
- the storage capacitor electrode 55 is used as the shield electrode 50 in the sixth embodiment, whereas the scanning line 28 is used as the shield electrode 50 in this modification.
- the shield electrode 50, the auxiliary capacitance electrode 55, or between the green pixel electrode 25G and the green signal line 27G and the blue signal line 27B An extension of the scan line 28 is formed. Therefore, the parasitic capacitance Csdl (G) formed between the green pixel electrode 25G and the green signal line 27G is, for example, from the parasitic capacitance Csdl (R) formed between the red pixel electrode 25R and the red signal line 27R.
- the parasitic capacitance Csd2 (G) formed between the smaller green pixel electrode 25G and the blue signal line 27B is, for example, from the parasitic capacitance Csd2 (B) formed between the blue pixel electrode 25B and the red signal line 27R. Is also small.
- the magnitude relationship of the parasitic capacitance generated between the pixel electrode and the signal line is the same as in the above-described embodiment.
- the capacitance generated between the green pixel electrode 25G and the adjacent signal line can be made smaller than the capacitance generated between the pixel electrode of another color and the adjacent signal line. The occurrence of shadowing and block division can be suppressed.
- the shield electrode 50 When the shield electrode 50 is connected to the scanning line 28 or the auxiliary capacitor electrode 55, a stable potential is supplied to the shield electrode 50, so that the shield electrode is formed in a floating island shape. As a result, the capacity of the signal line increases. Therefore, when the shield electrode of all pixels is connected to a scanning line or the like in order to reduce the parasitic capacitance in all color pixels, the capacity of the entire signal line becomes very large. However, in the embodiment using the shield electrode 50 described above, since the shield electrode 50 is connected to the scanning line 28 and the auxiliary capacitor electrode 55 only in one color pixel with high luminance, a signal adjacent to another pixel is used. The advantage is that the line capacity can be kept small.
- the shield electrode 50 cannot be connected to the scanning line 28 or the auxiliary capacitance electrode 55, no signal is input to the shield electrode 50. Therefore, even if a leak occurs between the shield electrode 50 and another part, the problem is small and the manufacturing yield is high.
- the shield electrode 50 is connected to the scanning line 28 or the auxiliary capacitor electrode 55, leakage becomes a problem and the yield is lowered. Therefore, to reduce the parasitic capacitance in all color pixels, When the pixel shield electrode is connected to a scanning line or the like, the yield is greatly reduced.
- the shield electrode 50 has a high luminance. Since it is connected to the scanning line 28 and the auxiliary capacitor electrode 55, it is advantageous in that the yield can be kept high compared to other pixels.
- the liquid crystal display device According to the liquid crystal display device according to the sixth embodiment and the modification thereof, it is possible to reduce the parasitic capacitance only for the influence of shadowing and block division, high brightness, and color. Therefore, shadowing and block division can be effectively reduced while suppressing an increase in signal line capacity and a decrease in yield.
- the LCD of Embodiment 7 is obtained by replacing the color display pixels of the three primary colors shown in Figs. 1 and 2 with color display pixels of four colors of red, green, blue, and white.
- the configuration of the white pixels in Embodiment 7 (including the arrangement of CF, BM, signal lines, scanning lines, etc.) is the same as the configuration of the green pixels in Embodiment 1, and the red pixels, green pixels,
- the configuration of the blue pixel is the same as the configuration of the red pixel and the blue pixel in the first embodiment.
- FIG. 10 is a diagram schematically showing a color display pixel in the seventh embodiment. In this figure, only the pixel electrode 25 and the signal line 27 are shown, and the configuration of the scanning line 28 and the CF layer 33 is not shown.
- the color display pixel of the seventh embodiment includes a red pixel electrode 25R, a green pixel electrode 25G, a blue pixel electrode 25B, a white pixel electrode 25W, a red signal line 27R, a green signal line 27G, and a blue signal.
- Line 27B and white signal line 27W are included. At least a part of the white signal line 27W extends between the white pixel electrode 25W and the blue pixel electrode 25B, and at least a part of the red signal line 27R has a red pixel electrode 25R and a white pixel electrode. Each is arranged to extend between 25W.
- the center of the green signal line 27G is positioned at the center of the gap between the green pixel electrode 25G and the red pixel electrode 25R, and the center of the blue signal line 27B is the blue pixel electrode 25B and the green pixel electrode 25G.
- the center of the green signal line 27G is positioned at the center of the gap between the green pixel electrode 25G and the red pixel electrode 25R
- the center of the blue signal line 27B is the blue pixel electrode 25B and the green pixel electrode 25G.
- the distance between the white pixel electrode 25W and the white signal line 27W is as follows: the blue pixel electrode 25B and the white signal line 27
- the distance between the white pixel electrode 25W and the red signal line 27R which is larger than the distance between W, is larger than the distance between the red pixel electrode 25R and the red signal line 27R.
- the distance between the white pixel electrode 25W and the white signal line 27W and the red signal line 27R adjacent to the white pixel electrode 25W is made larger than the distance between the pixel electrode 25 of another color and the signal line 27 adjacent thereto.
- the parasitic capacitance Csdl (W) generated between the white pixel electrode 25W and the white signal line 27W is increased by the parasitic capacitance Csdl (B) generated between the blue pixel electrode 25B and the blue signal line 27B. It can be made smaller.
- the parasitic capacitance Csd generated between the white pixel electrode 25W and the signal line 27 is smaller than the parasitic capacitance Csd generated between the pixel electrode of another color and the signal line. Therefore, when displaying an image, the potential of the white pixel electrode 25W (drain potential Vd) is less affected by the parasitic capacitance Csd than the red pixel electrode 25R, the green pixel electrode 25G, and the blue pixel electrode 25B. The amount of change AVsd in the drain potential due to the parasitic capacitance Csd can be kept small.
- the amount of change in brightness for white (the highest Y value or the least tint) in RGBW display is less than the amount of change in brightness for other colors. be able to.
- the display can be displayed with very few blocks! (Very conspicuous).
- the configuration of the green pixel in the first to sixth embodiments and the modifications thereof may be applied to the configuration of the white pixel of the present embodiment.
- the configurations of the red pixel, the blue pixel, and the green pixel of the present embodiment can be achieved by applying the configurations of the red pixel and the blue pixel in the first to sixth embodiments and the modifications thereof.
- parasitic capacitances Csd (W), Csd (G), and Csd for each of white pixels, green pixels, red pixels, and blue pixels are provided.
- the relationship between R) and Csd (B) may be as follows.
- This special polarity inversion drive is different from the line inversion drive described with reference to FIG. 15 and the dot inversion drive described with reference to FIG.
- An invention relating to a display device using a special polarity inversion drive is described in detail in Japanese Patent Application No. 2005-344914 by the present inventor.
- FIG. 11 (a) is a diagram for explaining special polarity inversion driving
- FIG. 11 (b) is a diagram showing the polarities of the signals supplied to the signal lines 27.
- FIG. 11 (a) the source driver (signal drive circuit) supplies signals with different polarities for each signal line in one line to the signal line 27. (At the output of the source driver, signals of opposite polarities are supplied to any adjacent signal lines). This is the same as the signal supply method of dot inversion, and the circuit used in the conventional dot inversion can be used for the source driver.
- the signal line 27 is arranged so that a part thereof intersects between the source driver and the display area.
- the white signal line 27W and the red signal adjacent thereto are arranged in the display area.
- a signal of the same polarity is supplied to the line 27R.
- the white signal line 27W and the adjacent blue signal line 27B, the green signal line 27B and the adjacent green signal line 27G, the green signal line 27G and the adjacent red signal line 27R is supplied with signals of different polarities.
- an LCD that has a high aperture ratio, is less likely to cause shadowing or block division, and can display high quality.
- Csdl Csd2 for all colors.
- the LCD of Embodiment 8 has the color display pixels of the red, green, blue, and white colors of Embodiment 7, red (R), green (G), blue (B), and yellow (Y). These are replaced with color display pixels of four colors.
- the configuration of white pixels in Embodiment 7 (including the arrangement of CF, BM, signal lines, scanning lines, etc.)
- the configuration of the yellow pixel in the embodiment is the same, and the configuration of the red pixel, the green pixel, and the blue pixel in the embodiment 7 is the same as the configuration of the red pixel, the green pixel, and the blue pixel in the present embodiment.
- Other configurations are the same as those of the seventh embodiment.
- the LCD of Embodiment 8 may use color display pixels of five colors of red (R), green (G), blue (B), cyan (C), and yellow (Y).
- the configuration of the yellow pixel is the same as the configuration of the white pixel of Embodiment 7 (including the arrangement of CF, BM, signal line, scanning line, etc.), and the red pixel, green pixel
- the configuration of the blue pixel is the same as the configuration of the red pixel, the green pixel, the blue pixel, and the cyan pixel in this embodiment.
- Other configurations are the same as those of the seventh embodiment.
- the LCD of Embodiment 8 uses color display pixels of six colors of red (R), green (G), blue (B), cyan (C), magenta (M), and yellow (Y). May be.
- the configuration of the yellow pixel is the same as the configuration of the white pixel of Embodiment 7 (including the arrangement of CF, BM, signal line, scanning line, etc.), and the red pixel, green pixel,
- the configuration of the blue pixel is the same as the configuration of the red pixel, green pixel, blue pixel, cyan pixel, and magenta pixel of this embodiment.
- Other configurations are the same as those of the seventh embodiment.
- the parasitic capacitance generated in the pixel with the highest luminance among the four to six color pixels included in the color display pixel (white pixel in the seventh embodiment) is set to be the smallest. . Therefore, the amount of change in lightness for white can be made smaller than the amount of change in lightness for other colors. As a result, it is possible to display images that are less likely to cause shadowing (or to cause shadows to be inconspicuous), and at the same time display that has very little block division (very noticeable).
- the configuration of the green pixel in the first to sixth embodiments and the modified examples thereof, and the configuration of the seventh embodiment and the modified examples thereof can also be applied to the yellow pixel configuration of the present embodiment. Further, the configurations of the red pixels and the blue pixels in the first to sixth embodiments and the modified examples thereof can be applied to the configuration of the pixels other than the yellow pixel of the present embodiment, and in the seventh embodiment and the modified examples thereof. A configuration of pixels other than yellow pixels can also be applied.
- Csdl Csd2 for all colors. More desirable. In this case, the effects of Csdl and Csd2 on the drain potential cancel each other, and the occurrence of shadowing can be suppressed.
- FIG. 12 is a diagram for explaining an effect obtained by the above-described embodiment and its modifications.
- Fig. 12 (a) shows a graph showing the aperture ratio when all colors Csd is reduced and only green pixels Csd is reduced for an LCD having RGB pixels.
- the horizontal axis of the graph shows the shadowing ratio during line inversion driving and the ratio of the block division level before dot inversion driving before Csd reduction, and the vertical axis shows the ratio of aperture ratio before Csd reduction. Yes.
- the shadowing rate and the block division level are the same in both graphs, a larger aperture ratio is obtained when Csd is reduced only for the green pixels.
- Fig. 12 (b) shows a graph showing the level of shadowing when the special polarity inversion drive described above is applied to an LCD with RGBW pixels.
- the horizontal axis of the graph shows the ratio between Csd (W) and Csd (R), Csd (G) or Csd (B), and the vertical axis shows the shadowing rate (Csd in all RGBW pixels is equivalent) Ratio to shadowing level).
- Csd of red pixel, blue pixel, and green pixel is the same.
- the SHA type liquid crystal display panel has been described as an example of the display device, but the display device of the present invention is not limited to this. Other types such as ASM mode, MVA mode, IPS mode, etc.
- the liquid crystal display device may be used.
- the display device of the present invention is not limited to a liquid crystal display device or a TFT display device, and the holding voltage of the pixel electrode is affected by the parasitic capacitance Csd between the pixel electrode and the wiring. Any display device can be included in the display device of the present invention.
- a display device with high display quality is provided.
- the display device according to the present invention is suitably used for various display devices, such as a liquid crystal display device, an organic EL display device, and the like, which is suitably used for a display device that has a switching element for each pixel and performs polarity inversion driving. It is done.
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JP2008510827A JP4969568B2 (ja) | 2006-03-30 | 2007-03-20 | 表示装置 |
US12/295,048 US7834946B2 (en) | 2006-03-30 | 2007-03-20 | Display device and color filter substrate |
CN2007800114424A CN101410882B (zh) | 2006-03-30 | 2007-03-20 | 显示装置及滤色器基板 |
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CN101968588B (zh) | 2013-04-17 |
US20090290080A1 (en) | 2009-11-26 |
CN101968588A (zh) | 2011-02-09 |
JPWO2007119454A1 (ja) | 2009-08-27 |
CN101410882A (zh) | 2009-04-15 |
JP2011013695A (ja) | 2011-01-20 |
JP2011013694A (ja) | 2011-01-20 |
US7834946B2 (en) | 2010-11-16 |
JP2011013696A (ja) | 2011-01-20 |
CN101968592A (zh) | 2011-02-09 |
CN101410882B (zh) | 2011-06-22 |
CN101968591B (zh) | 2013-06-19 |
JP5313988B2 (ja) | 2013-10-09 |
JP4969568B2 (ja) | 2012-07-04 |
CN101968591A (zh) | 2011-02-09 |
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