WO2011049106A1 - 液晶表示装置 - Google Patents
液晶表示装置 Download PDFInfo
- Publication number
- WO2011049106A1 WO2011049106A1 PCT/JP2010/068438 JP2010068438W WO2011049106A1 WO 2011049106 A1 WO2011049106 A1 WO 2011049106A1 JP 2010068438 W JP2010068438 W JP 2010068438W WO 2011049106 A1 WO2011049106 A1 WO 2011049106A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pixel
- pixels
- liquid crystal
- crystal display
- display device
- Prior art date
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 119
- 239000000758 substrate Substances 0.000 claims abstract description 31
- 239000011159 matrix material Substances 0.000 claims abstract description 19
- 239000003086 colorant Substances 0.000 claims abstract description 13
- 239000010408 film Substances 0.000 description 17
- 239000010410 layer Substances 0.000 description 14
- 239000003990 capacitor Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 239000011229 interlayer Substances 0.000 description 4
- 230000003071 parasitic effect Effects 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- UWCWUCKPEYNDNV-LBPRGKRZSA-N 2,6-dimethyl-n-[[(2s)-pyrrolidin-2-yl]methyl]aniline Chemical compound CC1=CC=CC(C)=C1NC[C@H]1NCCC1 UWCWUCKPEYNDNV-LBPRGKRZSA-N 0.000 description 1
- 206010047571 Visual impairment Diseases 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- G02F1/1345—Conductors connecting electrodes to cell terminals
-
- 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
-
- 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
-
- 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
-
- 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
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
Definitions
- the present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device that performs color display using four or more types of pixels that display different colors.
- liquid crystal display devices are used for various purposes.
- one picture element is composed of three pixels that display red, green, and blue, which are the three primary colors of light, thereby enabling color display.
- the conventional liquid crystal display device has a problem that a displayable color range (referred to as a “color reproduction range”) is narrow.
- a method of increasing the number of primary colors used for display has been proposed.
- Patent Document 1 includes a yellow pixel Y for displaying yellow in addition to a red pixel R for displaying red, a green pixel G for displaying green, and a blue pixel B for displaying blue, as shown in FIG.
- a liquid crystal display device 800 in which one picture element P is configured by four pixels is disclosed.
- color display is performed by mixing four primary colors of red, green, blue, and yellow displayed by the four pixels R, G, B, and Y.
- the color reproduction range can be made wider than that of a conventional liquid crystal display device that performs display using three primary colors.
- a liquid crystal display device that performs display using four or more primary colors is referred to as a “multi-primary color liquid crystal display device”, and a liquid crystal display device that performs display using three primary colors is referred to as a “three primary color liquid crystal display device”.
- Patent Document 2 in addition to the red pixel R, the green pixel G, and the blue pixel B, one picture element P is formed by four pixels including a white pixel W that displays white.
- a structured liquid crystal display device 900 is disclosed. In the liquid crystal display device 900, since the added pixel is the white pixel W, the color reproduction range cannot be widened, but the display luminance can be increased.
- the dot inversion driving is a method for suppressing the occurrence of display flicker (referred to as flicker), and is a driving method for inverting the polarity of the applied voltage for each pixel.
- FIG. 13 shows the polarity of the voltage applied to each pixel when dot inversion driving is performed on the three primary color liquid crystal display device
- FIGS. 14 and 15 show the case where dot inversion driving is performed on the liquid crystal display devices 800 and 900. The polarity of the voltage applied to each pixel is shown.
- the polarity of the voltage applied to the pixels of the same color is reversed along the row direction.
- the polarity of the applied voltage to the red pixel R increases from positive (+), negative ( ⁇ ), and positive
- the polarity of the voltage applied to the green pixel G is negative ( ⁇ ), positive (+), and negative ( ⁇ )
- the polarity of the voltage applied to the blue pixel B is positive (+), negative ( ⁇ ), Positive (+).
- the polarities of the voltages applied to the pixels are all the same.
- the polarities of the applied voltages to the red pixel R and the yellow pixel Y are all positive (+), and the green pixel G and the blue pixel B
- the polarity of the applied voltage is negative (-).
- the polarities of the applied voltages to the red pixel R and the blue pixel B are all positive (+), and the green pixel G and the white pixel
- the polarity of the voltage applied to W is all negative (-).
- a horizontal shadow SD having higher luminance than the original display is displayed on the left and right sides of the window WD. May occur.
- FIG. 16B shows an equivalent circuit of a region corresponding to two pixels of a general liquid crystal display device. As shown in FIG. 16B, each pixel is provided with a thin film transistor (TFT) 14.
- TFT thin film transistor
- the scanning line 12, the signal line 13, and the pixel electrode 11 are electrically connected to the gate electrode, the source electrode, and the drain electrode of the TFT 14, respectively.
- the pixel electrode 11, the counter electrode 21 provided so as to face the pixel electrode 11, and the liquid crystal layer positioned between the pixel electrode 11 and the counter electrode 21 constitute a liquid crystal capacitor CLC .
- the auxiliary capacitor CCS is constituted by the dielectric layer (insulating film) located in the region.
- the auxiliary capacity counter electrode 15a is electrically connected to the auxiliary capacity line 15 and supplied with an auxiliary capacity counter voltage (CS voltage).
- FIGS. 16C and 16D show changes over time in the CS voltage and the gate voltage. In FIG. 16C and FIG. 16D, the polarity of the write voltage (the gradation voltage supplied to the pixel electrode 11 via the signal line 13) is different from each other.
- ⁇ Ripple voltage superimposed on CS voltage decays with time.
- the ripple voltage becomes almost zero when the gate voltage is turned off.
- the ripple voltage is higher than that in the pixel that displays the background BG. Therefore, as shown in FIGS.
- the ripple voltage superimposed on the CS voltage is not completely attenuated when the gate voltage is turned off, and the ripple voltage is attenuated even after the gate voltage is turned off. Therefore, the drain voltage (pixel electrode potential) affected by the CS voltage deviates from the original level due to the remaining ripple voltage V ⁇ .
- FIG. 17 shows a liquid crystal display device 1000 disclosed in Patent Document 3.
- the liquid crystal display device 1000 is provided in a liquid crystal display panel 1001 having a picture element P composed of red pixels R, green pixels G, blue pixels B, and white pixels W, and the liquid crystal display panel 1001.
- the source driver 1003 includes a plurality of individual drivers 1003a each corresponding one-to-one with the plurality of signal lines 1013.
- the plurality of individual drivers 1003a are arranged along the row direction and output positive or negative grayscale voltages, respectively.
- the polarity of the gradation voltage output from two adjacent individual drivers is always reversed. That is, the polarity of the grayscale voltage output from the source driver in a certain horizontal scanning period is always reversed to positive, negative, positive, negative... Along the row direction.
- the polarities of the gradation voltages output from the two adjacent individual drivers 1003a are not necessarily reversed. That is, the polarity of the gradation voltage output from the source driver 1003 in a certain horizontal scanning period is basically inverted along the row direction, but the same polarity as positive, positive, negative, or negative may continue. .
- gradation voltages having opposite polarities are supplied to the pixel electrodes of two pixels adjacent in the row direction, and in the row direction.
- gradation voltages having opposite polarities are supplied to the pixel electrodes of the pixels displaying the same color. Therefore, the polarities of the voltages applied to the same color pixels are not aligned along the row direction, and the occurrence of horizontal shadow can be prevented.
- the potential of the pixel electrode of a pixel not only changes in voltage of a signal line 1013 (hereinafter also referred to as “own source”) for supplying a gradation voltage to the pixel electrode of the pixel, but also to the pixel. It is also affected by a voltage change of a signal line 1013 (hereinafter also referred to as “other source”) for supplying a gradation voltage to the pixel electrode of a pixel adjacent in the row direction. Therefore, as shown in FIG. 18B, if the polarity of the signal of the own source and the polarity of the signal of the other source are opposite, the fluctuation amount ⁇ V of the potential of the pixel electrode is canceled.
- the polarity of the own source signal is the same as the polarity of the other source signal, and therefore ⁇ V is not canceled. . Therefore, the drain voltage is reduced by ⁇ V, and the effective voltage applied to the liquid crystal layer is reduced. For this reason, the display luminance is deviated from the original level. As a result, for example, in the normally black mode, the display becomes dark and the display quality is deteriorated. This deterioration in display quality is visually recognized as, for example, line-shaped display unevenness (called vertical shadow) extending in the column direction.
- vertical shadow line-shaped display unevenness
- the present invention has been made in view of the above problems, and an object thereof is to improve the display quality of a liquid crystal display device in which one picture element is defined by an even number of pixels.
- a liquid crystal display device has a plurality of pixels arranged in a matrix including a plurality of rows and a plurality of columns, and is connected to the pixel electrode provided in each of the plurality of pixels and the pixel electrode
- An active matrix substrate having a switching element, a plurality of scanning lines extending in the row direction and a plurality of signal lines extending in the column direction, a counter substrate facing the active matrix substrate, and the active matrix substrate and the counter substrate
- a liquid crystal layer provided between them, a scanning line driving circuit for supplying a scanning signal to each of the plurality of scanning lines, and a positive or negative gradation voltage for each of the plurality of signal lines as a display signal
- the plurality of signal lines include two signal lines per pixel column, and the two signal lines are supplied with gradation voltages having opposite polarities from the signal line driving circuit.
- the first signal line and the second signal line wherein one of the switching elements of two pixels adjacent in the column direction among the plurality of pixels is connected to the first signal line,
- the switching element is connected to the second signal line, and the switching elements of the pixels of two adjacent pixel rows among the plurality of pixels are on / off controlled by a common scanning signal.
- four signal lines corresponding to two adjacent pixel columns among the plurality of signal lines are the first signal line of one pixel column and the second signal line of the other pixel column.
- the signal lines are arranged adjacent to each other.
- four signal lines corresponding to two adjacent pixel columns among the plurality of signal lines are arranged so that the first signal lines or the second signal lines are adjacent to each other. Has been.
- the plurality of pixels are arranged so that m types of pixels are repeatedly arranged in the same order along the row direction.
- the liquid crystal display device has a plurality of picture elements each defined by m pixels continuous along the row direction, and within each of the plurality of picture elements, To the pixel electrodes of two adjacent pixels, gradation voltages having opposite polarities are applied, and the two pixels adjacent in the row direction among the plurality of pixels have the same color. The gradation voltages having opposite polarities are applied to the pixel electrodes of the pixels to be displayed.
- the plurality of pixels include a red pixel that displays red, a green pixel that displays green, and a blue pixel that displays blue.
- the plurality of pixels further include a yellow pixel that displays yellow.
- the plurality of pixels further include white pixels that display white.
- the plurality of pixels further include a cyan pixel that displays cyan, a magenta pixel that displays magenta, and a yellow pixel that displays yellow.
- the vertical scanning frequency is 120 Hz or higher.
- the display quality of a liquid crystal display device in which one picture element is defined by an even number of pixels can be improved.
- FIG. 3 is a diagram schematically showing a liquid crystal display device 100 according to a preferred embodiment of the present invention, and is a cross-sectional view taken along line 3A-3A ′ in FIG. 2. It is a figure which shows typically the liquid crystal display device 100 in suitable embodiment of this invention. It is a figure which shows typically the liquid crystal display device 100 in suitable embodiment of this invention.
- FIG. (A)-(d) is a figure for demonstrating the reason why horizontal shadow occurs. It is a figure which shows the conventional liquid crystal display device 1000 typically.
- (A) And (b) is a figure for demonstrating the reason that the display quality fall occurs in the conventional liquid crystal display device 1000.
- FIG. 1 shows a liquid crystal display device 100 according to this embodiment.
- the liquid crystal display device 100 includes a liquid crystal display panel 1 having a plurality of pixels arranged in a matrix including a plurality of rows and a plurality of columns, and scanning for supplying drive signals to the liquid crystal display panel 1.
- a line drive circuit (gate driver) 2 and a signal line drive circuit (source driver) 3 are provided.
- the plurality of pixels of the liquid crystal display panel 1 include a red pixel R that displays red, a green pixel G that displays green, a blue pixel B that displays blue, and a yellow pixel Y that displays yellow. That is, the plurality of pixels include four types of pixels that display different colors.
- These plural pixels are arranged so that four types of pixels are repeatedly arranged in the same order along the row direction.
- a plurality of pixels are cyclically arranged in the order of a blue pixel B, a green pixel G, a red pixel R, and a yellow pixel Y from the left side to the right side in the drawing.
- One picture element P which is the smallest unit for performing color display is defined by four pixels which are continuous along the row direction.
- four types of pixels are arranged in the order of blue pixel B, green pixel G, red pixel R, and yellow pixel Y from the left side to the right side in the figure. .
- FIG. 2 is a plan view showing a region corresponding to eight pixels (two picture elements P adjacent in the column direction) arranged in two rows and four columns among a plurality of pixels of the liquid crystal display panel 1. It is.
- FIG. 3 is a cross-sectional view showing a region corresponding to two adjacent pixels along the row direction, and is a cross-sectional view taken along line 3A-3A ′ in FIG.
- the liquid crystal display panel 1 includes an active matrix substrate 10, a counter substrate 20 facing the active matrix substrate 10, and a liquid crystal layer 30 provided between the active matrix substrate 10 and the counter substrate 20.
- the active matrix substrate 10 includes a pixel electrode 11 provided in each of a plurality of pixels, a thin film transistor (TFT) 14 connected to the pixel electrode 11, a plurality of scanning lines 12 extending in a row direction, and a column direction. And a plurality of signal lines 13.
- the TFTs 14 functioning as switching elements are supplied with scanning signals from the corresponding scanning lines 12 and supplied with display signals from the corresponding signal lines 13.
- the scanning line 12 is provided on an insulating transparent substrate (for example, a glass substrate) 10a.
- auxiliary capacitance lines 15 extending in the row direction are also provided on the transparent substrate 10a.
- the auxiliary capacitance line 15 is formed of the same conductive film as the scanning line 12.
- a storage capacitor counter voltage (CS voltage) is supplied to the storage capacitor line 15.
- a gate insulating film 16 is provided so as to cover the scanning line 12 and the auxiliary capacitance line 15.
- a signal line 13 is provided on the gate insulating film 16.
- An interlayer insulating film 18 is provided so as to cover the signal line 13.
- a pixel electrode 11 is provided on the interlayer insulating film 18.
- the counter substrate 20 has a counter electrode 21 that faces the pixel electrode 11.
- the counter electrode 21 is provided on an insulating transparent substrate (for example, a glass substrate) 20a.
- the counter substrate 20 typically further includes a color filter layer and a light shielding layer (black matrix).
- the color filter layer corresponds to the red pixel R, the green pixel G, the blue pixel B, and the yellow pixel Y, a red color filter that transmits red light, a green color filter that transmits green light, and blue light.
- a blue color filter that transmits light and a yellow color filter that transmits yellow light are included.
- the light shielding layer is provided between these color filters.
- Alignment films 19 and 29 are formed on the outermost surfaces of the active matrix substrate 10 and the counter substrate 20 (the outermost surface on the liquid crystal layer 30 side). As the alignment films 19 and 29, a horizontal alignment film or a vertical alignment film is provided depending on the display mode.
- the liquid crystal layer 30 includes liquid crystal molecules having positive or negative dielectric anisotropy depending on the display mode.
- the liquid crystal layer 30 further includes a chiral agent as necessary.
- the pixel electrode 11, the counter electrode 21 facing the pixel electrode 11, and the liquid crystal layer 30 positioned therebetween constitute a liquid crystal capacitor CLC .
- the auxiliary capacitance CCS is constituted by the pixel electrode 11, the auxiliary capacitance line 15, and the gate insulating film 16 and the interlayer insulating film 18 positioned therebetween.
- the configuration of the auxiliary capacitor CCS is not limited to the one exemplified here.
- a storage capacitor electrode from the same conductive film as the signal line 13, and the auxiliary capacitance electrode, and the auxiliary capacitance line 15, also constitute a storage capacitance C CS by a gate insulating film 16 located therebetween Good.
- FIG. 4 is a diagram showing a connection relationship between the scanning line driving circuit 2 and the signal line driving circuit 3 and the liquid crystal display panel 1.
- the scanning line driving circuit 2 supplies a scanning signal to each of the plurality of scanning lines 12 of the liquid crystal display panel 1.
- the signal line driving circuit 3 supplies a display signal to each of the plurality of signal lines 13 of the liquid crystal display panel 1.
- the signal line driving circuit 3 includes a plurality of output terminals 3a arranged in the row direction. The plurality of output terminals 3a and the plurality of signal lines 13 are connected one to one. From each output terminal 3a, a positive or negative gradation voltage is output. Therefore, the signal line drive circuit 3 supplies a positive or negative gradation voltage to each of the plurality of signal lines 13 as a display signal.
- the polarity of the gradation voltage is determined based on the voltage (counter voltage) supplied to the counter electrode 21. 2 and 4, the polarity of the gradation voltage output from the output terminal 3 a of the signal line driving circuit 3 (that is, supplied to the signal line 13) in a certain vertical scanning period, and the signal line 13 and the TFT 14 are used.
- the polarity of the gradation voltage applied to the pixel electrode 11 is indicated by “+” or “ ⁇ ”.
- one signal line is provided for each pixel column.
- two signal lines 13 are provided for each pixel column.
- one of the two signal lines 13 corresponding to each pixel column is also referred to as a “first signal line”, and the other 13b is also referred to as a “second signal line”.
- the first signal line 13 a and the second signal line 13 b are supplied with gradation voltages having opposite polarities from the signal line driving circuit 3.
- a positive gradation voltage is supplied to the first signal line 13a, and a negative gradation voltage is supplied to the second signal line 13b.
- a negative gradation voltage is supplied to the first signal line 13a, and a positive gradation voltage is supplied to the second signal line 13b.
- the first signal line 13 a is disposed on the left side of the pixel electrode 11, and the second signal line 13 b is disposed on the right side of the pixel electrode 11. Therefore, the plurality of signal lines 13 are arranged such that the first signal lines 13a and the second signal lines 13b appear alternately and repeatedly along the row direction. That is, when attention is paid to the four signal lines 13 corresponding to two adjacent pixel columns, the four signal lines 13 include the first signal line 13a of one pixel column and the second signal line 13b of the other pixel column. Are arranged adjacent to each other.
- one TFT 14 of two pixels adjacent in the column direction is connected to the first signal line 13a, and the other TFT 14 is connected to the second signal line 13b.
- the TFT 14 of the upper blue pixel B is connected to the first signal line 13a
- the TFT 14 of the lower blue pixel B is It is connected to the second signal line 13b.
- the TFT 14 is connected to the first signal line 13a (hereinafter, also referred to as “first type pixel”)
- the TFT 14 is connected to the second signal line 13b.
- Pixels hereinafter also referred to as “second type pixels” are alternately arranged.
- the first type pixels and the second type pixels are basically arranged alternately, but in some areas, the first type pixels (or A second type of pixel) is continuous. Specifically, in each picture element P, first-type pixels and second-type pixels are alternately arranged, but between two adjacent picture elements P along the row direction. In the boundary, the first type of pixels (or the second type of pixels) are continuous. For example, in each of the four picture elements P shown in FIG. 4, the pixel in which the TFT 14 is connected to the first signal line 13a and the pixel in which the TFT 14 is connected to the second signal line 13b are alternated.
- the blue pixels B are continuous.
- the two adjacent scanning lines 12 are connected to each other outside the display area (area contributing to display in which a plurality of pixels are arranged), and are connected via the common signal line 12 ′.
- the scanning line driving circuit 2 For this reason, the TFTs 14 of the pixels for two adjacent pixel rows are ON / OFF controlled by a common scanning signal. That is, in one horizontal scanning period, pixels for two pixel rows are simultaneously selected.
- the pixel electrodes 11 of two adjacent pixels within each of the plurality of picture elements P are applied with gradation voltages having opposite polarities.
- the gradation voltages having opposite polarities are also applied to the pixel electrodes 11 of two pixels adjacent in the column direction.
- the polarity of the gradation voltage is inverted for each pixel in the column direction, and the polarity of the gradation voltage is inverted for each pixel in each pixel P in the row direction. ing. That is, in the liquid crystal display device 100, inversion driving close to dot inversion driving is performed. Therefore, the occurrence of flicker is suppressed.
- the pixel electrodes 11 of the pixels displaying the same color in the two adjacent pixel elements P along the row direction among the plurality of pixel elements P have the opposite polarities.
- a regulated voltage is applied. For example, a positive gradation voltage is applied to the pixel electrode 11 of the pixel P of the upper left pixel P in FIG. 4 while the blue pixel of the pixel P of the upper right pixel is applied to the pixel electrode 11 of the red pixel R.
- a negative gradation voltage is applied to the pixel electrodes 11 of the B and red pixels R, and a negative gradation voltage is applied to the pixel electrodes 11 of the green pixel G and the yellow pixel Y of the upper left pixel P.
- the liquid crystal display device 100 two signal lines 13a and 13b are provided for each pixel column, and gradation voltages having opposite polarities are supplied to these signal lines 13a and 13b. Therefore, the pixel electrode 11 of each pixel is always sandwiched between the signal lines 13a and 13b having opposite polarities. For this reason, the variation amount ⁇ V (expressed by the expression (1)) of the drain voltage (the potential of the pixel electrode 11) via the source-drain capacitance Csd after pixel charging is canceled, so that the original level of display luminance is obtained. Deviation from is suppressed. As a result, occurrence of vertical shadow is prevented and display quality is improved.
- the TFTs 14 of the pixels for two adjacent pixel rows are controlled to be turned on / off by a common scanning signal, writing (charging) to the pixels is performed for each two pixel rows. Therefore, compared to a general liquid crystal display device in which writing is performed for each pixel row, one horizontal scanning period can be set longer, and a long charging time for pixels can be secured.
- double-speed driving has been proposed as a technique for reducing the afterimage feeling during moving image display.
- the vertical scanning frequency is increased from a general 60 Hz to 120 Hz (2 ⁇ speed) or 240 Hz (4 ⁇ speed).
- double-speed driving driving with a vertical scanning frequency of 120 Hz or more
- FIG. 4 illustrates a configuration in which two adjacent scanning lines 12 are connected to each other in the liquid crystal display panel 1 (in the active matrix substrate 10), the present invention is limited to such a configuration. Is not to be done. Any configuration may be adopted as long as the TFTs 14 of the pixels for two adjacent pixel rows are controlled to be turned on / off by a common scanning signal.
- two adjacent scanning lines 12 may not be connected to each other in the liquid crystal display panel 1 but may be connected to each other in the scanning line driving circuit 2.
- FIG. 6 only one scanning line 12 may be provided for every two pixel rows, and the TFTs 14 of pixels for two pixel rows may be connected to the same scanning line 12.
- Embodiment 2 The liquid crystal display device 200 according to this embodiment will be described with reference to FIGS. In the following description, the liquid crystal display device 200 will be described focusing on differences from the liquid crystal display device 100 according to the first embodiment.
- liquid crystal display device 100 In the liquid crystal display device 100 according to Embodiment 1, four signal lines 13 corresponding to two adjacent pixel columns are adjacent to the first signal line 13a of one pixel column and the second signal line 13b of the other pixel column. Are arranged to be. That is, gradation voltages having opposite polarities are supplied to two adjacent signal lines 13 without sandwiching a pixel (pixel electrode 11).
- the four signal lines 13 corresponding to the adjacent two pixel columns are connected to each other between the first signal lines 13a or the second signal. It arrange
- the gradation voltages having the same polarity are supplied to the two adjacent signal lines 13 (that is, closest) without sandwiching the pixel.
- the power consumption caused by the parasitic capacitance of the signal line can be suppressed, and the load on the signal line driver circuit (source driver) 3 can be reduced.
- the polarity arrangement of the gradation voltages output from the signal line driving circuit (source driver) 3 is a general-purpose arrangement in which positive polarity and negative polarity are alternately arranged. This is because it is the same as the source driver for dot inversion, so that a general-purpose dot inversion driver can be used as a controller for sending a control signal to the signal line drive circuit 3.
- each picture element P includes four types of pixels, but the present invention is not limited to this.
- the present invention is widely used in liquid crystal display devices defined by m types (m is an even number of 4 or more) of pixels in which the picture elements P display different colors.
- each picture element P may be defined by six types of pixels.
- each picture element P includes a red pixel R, a green pixel G, a blue pixel B, and a yellow pixel Y, as well as a cyan pixel C that displays cyan and a magenta pixel M that displays magenta. .
- each picture element P may be defined by red pixel R, green pixel G, blue pixel B, and cyan pixel C, or red pixel R, green pixel
- Each pixel P may be defined by the pixel G, the blue pixel B, and the magenta pixel M.
- each picture element P may be defined by a red pixel R, a green pixel G, a blue pixel B, and a white pixel W.
- a color filter that is colorless and transparent that is, transmits white light
- the added primary color is white, the effect of widening the color reproduction range cannot be obtained, but the display brightness of one picture element P can be improved.
- m types of pixels are arranged in one row and m columns in the picture element P, and the arrangement of the color filters is a so-called stripe arrangement.
- the invention is not limited to this.
- the plurality of pixels may be arranged so that n types (n is an even number less than m and a divisor of m) of the m types of pixels are repeatedly arranged in the same order along the row direction. . That is, it is only necessary that m types of pixels are arranged in (m / n) rows and n columns in the picture element P.
- m n may be satisfied, or m ⁇ n may be satisfied.
- the eight types of pixels may be arranged in two rows and four columns within the picture element P.
- the display quality of a liquid crystal display device in which one picture element is defined by an even number of pixels can be improved.
- the present invention is suitably used for a multi-primary color liquid crystal display device.
- Liquid crystal display panel 2. Scanning line drive circuit (gate driver) 3. Signal line drive circuit (source driver) 3a output terminal 10 active matrix substrate 10a, 20a transparent substrate 11 pixel electrode 12 scanning line 12 'common scanning line 13 signal line 13a first signal line 13b second signal line 14 thin film transistor (TFT) 15 Auxiliary Capacitor Line 16 Gate Insulating Film 18 Interlayer Insulating Film 19, 29 Alignment Film 20 Counter Substrate 21 Counter Electrode 30 Liquid Crystal Layer 100, 200 Liquid Crystal Display Device P Pixel R Red Pixel G Green Pixel B Blue Pixel Y Yellow Pixel C Cyan Pixel M Magenta pixel W White pixel
Abstract
Description
ΔV=Vspp・(Csd/Cpix) ・・・(1)
図1に、本実施形態における液晶表示装置100を示す。液晶表示装置100は、図1に示すように、複数の行および複数の列を含むマトリクス状に配列された複数の画素を有する液晶表示パネル1と、液晶表示パネル1に駆動信号を供給する走査線駆動回路(ゲートドライバ)2および信号線駆動回路(ソースドライバ)3とを備える。
図7および図8を参照しながら、本実施形態における液晶表示装置200を説明する。以下の説明では、液晶表示装置200が実施形態1における液晶表示装置100と異なる点を中心に説明を行う。
2 走査線駆動回路(ゲートドライバ)
3 信号線駆動回路(ソースドライバ)
3a 出力端子
10 アクティブマトリクス基板
10a、20a 透明基板
11 画素電極
12 走査線
12’ 共通走査線
13 信号線
13a 第1信号線
13b 第2信号線
14 薄膜トランジスタ(TFT)
15 補助容量線
16 ゲート絶縁膜
18 層間絶縁膜
19、29 配向膜
20 対向基板
21 対向電極
30 液晶層
100、200 液晶表示装置
P 絵素
R 赤画素
G 緑画素
B 青画素
Y 黄画素
C シアン画素
M マゼンタ画素
W 白画素
Claims (10)
- 複数の行および複数の列を含むマトリクス状に配列された複数の画素を有し、
前記複数の画素のそれぞれに設けられた画素電極、前記画素電極に接続されたスイッチング素子、行方向に延びる複数本の走査線および列方向に延びる複数本の信号線を有するアクティブマトリクス基板と、
前記アクティブマトリクス基板に対向する対向基板と、
前記アクティブマトリクス基板と前記対向基板との間に設けられた液晶層と、
前記複数本の走査線のそれぞれに走査信号を供給する走査線駆動回路と、
前記複数本の信号線のそれぞれに正極性または負極性の階調電圧を表示信号として供給する信号線駆動回路と、を備え、
前記複数の画素は、互いに異なる色を表示するm種類(mは4以上の偶数)の画素を含む液晶表示装置であって、
前記複数本の信号線は、1画素列につき2本の信号線を含み、
前記2本の信号線は、前記信号線駆動回路から互いに逆の極性の階調電圧を供給される第1信号線および第2信号線であり、
前記複数の画素のうちの列方向に沿って隣接する2個の画素の一方の前記スイッチング素子は前記第1信号線に接続され、他方の前記スイッチング素子は前記第2信号線に接続されており、
前記複数の画素のうちの隣接する2画素行分の画素の前記スイッチング素子が、共通の走査信号によってオン/オフ制御される液晶表示装置。 - 前記複数本の信号線のうちの隣接する2画素列に対応する4本の信号線は、一方の画素列の前記第1信号線と他方の画素列の前記第2信号線とが隣接するように配置されている請求項1に記載の液晶表示装置。
- 前記複数本の信号線のうちの隣接する2画素列に対応する4本の信号線は、前記第1信号線同士または前記第2信号線同士が隣接するように配置されている請求項1に記載の液晶表示装置。
- 前記複数の画素は、行方向に沿ってm種類の画素が同じ順で繰り返し並ぶように配列されている請求項1から3のいずれかに記載の液晶表示装置。
- それぞれが行方向に沿って連続するm個の画素によって規定される複数の絵素を有し、
前記複数の絵素のそれぞれ内で、隣接する2個の画素の前記画素電極には、互いに逆の極性の階調電圧が印加され、
前記複数の絵素のうちの行方向に沿って隣接する2個の絵素において、同じ色を表示する画素の前記画素電極には、互いに逆の極性の階調電圧が印加される請求項4に記載の液晶表示装置。 - 前記複数の画素は、赤を表示する赤画素、緑を表示する緑画素および青を表示する青画素を含む請求項1から5のいずれかに記載の液晶表示装置。
- 前記複数の画素は、黄を表示する黄画素をさらに含む請求項6に記載の液晶表示装置。
- 前記複数の画素は、白を表示する白画素をさらに含む請求項6に記載の液晶表示装置。
- 前記複数の画素は、シアンを表示するシアン画素、マゼンタを表示するマゼンタ画素および黄を表示する黄画素をさらに含む請求項6に記載の液晶表示装置。
- 垂直走査周波数が120Hz以上である請求項1から9のいずれかに記載の液晶表示装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/501,797 US20120200615A1 (en) | 2009-10-22 | 2010-10-20 | Liquid crystal display device |
JP2011537273A JPWO2011049106A1 (ja) | 2009-10-22 | 2010-10-20 | 液晶表示装置 |
CN2010800478812A CN102576522A (zh) | 2009-10-22 | 2010-10-20 | 液晶显示装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009243485 | 2009-10-22 | ||
JP2009-243485 | 2009-10-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011049106A1 true WO2011049106A1 (ja) | 2011-04-28 |
Family
ID=43900329
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2010/068438 WO2011049106A1 (ja) | 2009-10-22 | 2010-10-20 | 液晶表示装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20120200615A1 (ja) |
JP (1) | JPWO2011049106A1 (ja) |
CN (1) | CN102576522A (ja) |
WO (1) | WO2011049106A1 (ja) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102707525A (zh) * | 2012-05-24 | 2012-10-03 | 北京京东方光电科技有限公司 | 一种阵列基板、液晶显示面板和液晶显示装置 |
CN102750919A (zh) * | 2012-06-26 | 2012-10-24 | 北京京东方光电科技有限公司 | 一种显示面板及其驱动方法、显示装置 |
CN102800276A (zh) * | 2012-05-22 | 2012-11-28 | 友达光电股份有限公司 | 显示装置及其操作方法 |
JP2016109782A (ja) * | 2014-12-03 | 2016-06-20 | 三星ディスプレイ株式會社Samsung Display Co.,Ltd. | 表示装置、および駆動方法 |
WO2017090206A1 (ja) * | 2015-11-27 | 2017-06-01 | 堺ディスプレイプロダクト株式会社 | 液晶表示装置 |
JP2019514077A (ja) * | 2016-06-27 | 2019-05-30 | 武漢華星光電技術有限公司 | 液晶表示パネル及び液晶表示装置 |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102778794B (zh) * | 2012-03-26 | 2015-10-07 | 北京京东方光电科技有限公司 | 一种液晶显示器及液晶显示面板 |
CN102929051B (zh) * | 2012-11-02 | 2016-06-22 | 京东方科技集团股份有限公司 | 一种防静电液晶显示屏及其制造方法 |
JP6283522B2 (ja) * | 2014-01-29 | 2018-02-21 | 株式会社ジャパンディスプレイ | 表示装置及び反射型液晶表示装置 |
KR102343719B1 (ko) * | 2015-02-25 | 2021-12-28 | 삼성디스플레이 주식회사 | 표시 장치 |
CN105093737A (zh) * | 2015-07-28 | 2015-11-25 | 深圳市华星光电技术有限公司 | 一种液晶显示器 |
CN105047162B (zh) * | 2015-08-26 | 2018-09-11 | 深圳市华星光电技术有限公司 | 阵列基板及其驱动方法 |
US10796650B2 (en) | 2016-03-16 | 2020-10-06 | Sharp Kabushiki Kaisha | Liquid crystal display device and driving method therefor |
US10366674B1 (en) | 2016-12-27 | 2019-07-30 | Facebook Technologies, Llc | Display calibration in electronic displays |
US11164897B2 (en) * | 2019-10-28 | 2021-11-02 | Sharp Kabushiki Kaisha | Display device |
CN112951099B (zh) * | 2021-02-04 | 2022-08-30 | 厦门天马微电子有限公司 | 显示面板及其驱动方法、显示装置 |
CN113777839B (zh) * | 2021-08-19 | 2022-08-05 | 深圳市华星光电半导体显示技术有限公司 | 显示面板及移动终端 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001033757A (ja) * | 1999-07-21 | 2001-02-09 | Nec Corp | アクティブマトリクス型液晶表示装置 |
JP2006106062A (ja) * | 2004-09-30 | 2006-04-20 | Sharp Corp | アクティブマトリクス型液晶表示装置およびそれに用いる液晶表示パネル |
JP2006523862A (ja) * | 2003-04-17 | 2006-10-19 | サムスン エレクトロニクス カンパニー リミテッド | 液晶表示装置 |
JP2009175468A (ja) * | 2008-01-25 | 2009-08-06 | Hitachi Displays Ltd | 表示装置 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4938685B2 (ja) * | 2005-11-30 | 2012-05-23 | シャープ株式会社 | 表示装置および表示部材の駆動方法 |
KR101189277B1 (ko) * | 2005-12-06 | 2012-10-09 | 삼성디스플레이 주식회사 | 액정 표시 장치 |
-
2010
- 2010-10-20 US US13/501,797 patent/US20120200615A1/en not_active Abandoned
- 2010-10-20 CN CN2010800478812A patent/CN102576522A/zh active Pending
- 2010-10-20 JP JP2011537273A patent/JPWO2011049106A1/ja active Pending
- 2010-10-20 WO PCT/JP2010/068438 patent/WO2011049106A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001033757A (ja) * | 1999-07-21 | 2001-02-09 | Nec Corp | アクティブマトリクス型液晶表示装置 |
JP2006523862A (ja) * | 2003-04-17 | 2006-10-19 | サムスン エレクトロニクス カンパニー リミテッド | 液晶表示装置 |
JP2006106062A (ja) * | 2004-09-30 | 2006-04-20 | Sharp Corp | アクティブマトリクス型液晶表示装置およびそれに用いる液晶表示パネル |
JP2009175468A (ja) * | 2008-01-25 | 2009-08-06 | Hitachi Displays Ltd | 表示装置 |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102800276A (zh) * | 2012-05-22 | 2012-11-28 | 友达光电股份有限公司 | 显示装置及其操作方法 |
CN102707525A (zh) * | 2012-05-24 | 2012-10-03 | 北京京东方光电科技有限公司 | 一种阵列基板、液晶显示面板和液晶显示装置 |
WO2013174109A1 (zh) * | 2012-05-24 | 2013-11-28 | 北京京东方光电科技有限公司 | 阵列基板、液晶显示面板和液晶显示装置 |
US9460670B2 (en) | 2012-05-24 | 2016-10-04 | Beijing Boe Optoelectronics Technology Co., Ltd. | Array substrate, liquid crystal display panel and liquid crystal display device |
CN102750919A (zh) * | 2012-06-26 | 2012-10-24 | 北京京东方光电科技有限公司 | 一种显示面板及其驱动方法、显示装置 |
US9460674B2 (en) | 2012-06-26 | 2016-10-04 | Beijing Boe Optoelectronics Technology Co., Ltd. | Display panel and driving method thereof, and display apparatus |
JP2016109782A (ja) * | 2014-12-03 | 2016-06-20 | 三星ディスプレイ株式會社Samsung Display Co.,Ltd. | 表示装置、および駆動方法 |
WO2017090206A1 (ja) * | 2015-11-27 | 2017-06-01 | 堺ディスプレイプロダクト株式会社 | 液晶表示装置 |
JP2019514077A (ja) * | 2016-06-27 | 2019-05-30 | 武漢華星光電技術有限公司 | 液晶表示パネル及び液晶表示装置 |
Also Published As
Publication number | Publication date |
---|---|
US20120200615A1 (en) | 2012-08-09 |
CN102576522A (zh) | 2012-07-11 |
JPWO2011049106A1 (ja) | 2013-03-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2011049106A1 (ja) | 液晶表示装置 | |
JP5314155B2 (ja) | 液晶表示装置 | |
JP5313988B2 (ja) | 表示装置 | |
JP5059363B2 (ja) | 液晶パネルの駆動方法 | |
US9019184B2 (en) | Liquid crystal display device including specific subpixel arrangement | |
JP4302172B2 (ja) | 表示装置 | |
US7440039B2 (en) | Active element substrate with simplified signal line arrangement having active elements and pixel electrodes and liquid crystal display device using the same | |
US20050190138A1 (en) | LCD and method of driving the same | |
US20110241979A1 (en) | Liquid crystal display | |
WO2011078168A1 (ja) | 液晶表示装置 | |
KR20050001249A (ko) | 액정표시장치 | |
JP2006259135A (ja) | 表示装置およびカラーフィルタ基板 | |
JP5204314B2 (ja) | 液晶表示装置 | |
KR101048700B1 (ko) | 액정표시장치 및 그 구동방법 | |
US8436955B2 (en) | Liquid crystal display having pairs of power source supply lines and a method for forming the same | |
JP5589018B2 (ja) | 液晶表示装置 | |
WO2018128142A1 (ja) | 液晶表示装置およびその駆動方法 | |
WO2011081160A1 (ja) | 液晶表示装置 | |
WO2010125716A1 (ja) | 表示装置および表示装置の駆動方法 | |
KR20050068850A (ko) | 액정표시장치 구동 방법 | |
WO2012077647A1 (ja) | 液晶パネル、表示装置、及び、その駆動方法 | |
CN113885260B (zh) | 显示面板 | |
WO2008053609A1 (fr) | Écran à cristaux liquides et procédé de commande associé |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201080047881.2 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 10824955 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2011537273 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13501797 Country of ref document: US |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 10824955 Country of ref document: EP Kind code of ref document: A1 |