WO2011070838A1 - 表示パネル、液晶表示装置、および、駆動方法 - Google Patents
表示パネル、液晶表示装置、および、駆動方法 Download PDFInfo
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- WO2011070838A1 WO2011070838A1 PCT/JP2010/066717 JP2010066717W WO2011070838A1 WO 2011070838 A1 WO2011070838 A1 WO 2011070838A1 JP 2010066717 W JP2010066717 W JP 2010066717W WO 2011070838 A1 WO2011070838 A1 WO 2011070838A1
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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
- G09G3/3655—Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors
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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
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0876—Supplementary capacities in pixels having special driving circuits and electrodes instead of being connected to common electrode or ground; Use of additional capacitively coupled compensation electrodes
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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
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0202—Addressing of scan or signal lines
- G09G2310/0221—Addressing of scan or signal lines with use of split matrices
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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
- G09G2320/0261—Improving the quality of display appearance in the context of movement of objects on the screen or movement of the observer relative to the screen
Definitions
- the present invention relates to a display panel that displays an image using liquid crystal.
- the present invention also relates to a liquid crystal display device including such a display panel.
- image display devices for displaying images are roughly classified into impulse-type image display devices such as CRTs (cathode ray tubes) and hold-type image display devices such as liquid crystal display devices.
- CRTs cathode ray tubes
- hold-type image display devices such as liquid crystal display devices.
- an impulse-type image display device a lighting period in which an image is displayed and a light-out period in which no image is displayed are alternately repeated, whereas in a hold-type image display device, a light-out period is usually provided. Absent.
- the hold-type image display device has the property that moving image blur is likely to occur compared to the impulse-type image display device.
- Patent Document 1 discloses an image display apparatus that divides one frame period into two subframes and supplies image signals having different gradation levels to the first half subframe and the second half subframe, respectively. . According to the technique described in Patent Document 1, the above-mentioned moving image blurring phenomenon can be suppressed by making the luminance of the image in the first half subframe different from the luminance of the image in the second half subframe.
- Patent Document 1 has a problem that the manufacturing cost increases because a frame memory for temporarily storing the input image signal is required. Further, since it is necessary to access the frame memory every time a frame is displayed, there is a problem that power consumption increases.
- the present invention has been made in view of the above problems, and an object of the present invention is to realize a display panel capable of suppressing the above-mentioned motion blur phenomenon while suppressing an increase in manufacturing cost and power consumption. There is.
- a display panel includes a plurality of gate bus lines, a plurality of source bus lines, a plurality of counter electrode bus lines, and an arbitrary gate among the plurality of gate bus lines.
- a transistor having a gate connected to a bus line, a source connected to an arbitrary source bus line of the plurality of source bus lines, a pixel electrode connected to a drain of the transistor, and a liquid crystal
- a source driver that supplies a source signal to an arbitrary source bus line, and one end of each of the plurality of gate bus lines.
- a gate driver for sequentially supplying a conduction signal for conducting the transistor to the arbitrary gate bus line, wherein the gate driver is connected to the arbitrary gate bus line.
- the gate driver In one scanning period from when the conduction signal is supplied to when the next conduction signal is supplied, at least a first voltage level and a second voltage level different from the first voltage level with respect to the arbitrary counter electrode bus line.
- a counter electrode driver for supplying a rectangular voltage signal having a voltage level of.
- a hold-type display device such as a liquid crystal display device
- an object stays at that position until a next frame is displayed after a frame is displayed. Even during a period in which the object is displayed, the moving object moves on the screen to track the object, so that a moving image blur phenomenon occurs in which the outline of the moving object is recognized as blurred.
- the display panel according to the present invention is connected to a plurality of gate bus lines, a plurality of source bus lines, a plurality of counter electrode bus lines, and an arbitrary gate bus line among the plurality of gate bus lines.
- a counter electrode that is opposed to the counter electrode connected to an arbitrary counter electrode bus line among the plurality of counter electrode bus lines, and is connected to one end of each of the plurality of source bus lines, and the arbitrary source bus
- a source driver for supplying a source signal to the line, and one end of each of the plurality of gate bus lines;
- a gate driver that sequentially supplies a conduction signal for conducting a transistor to the arbitrary gate bus line, wherein the gate driver transmits the conduction signal to the arbitrary gate bus line. Is supplied from the first voltage level and the second voltage level different from the first voltage level to the arbitrary counter electrode bus line in one scanning period from the supply of the first conduction level to the next conduction signal.
- a first voltage level and a first voltage level A second voltage level comprising capable of applying.
- the luminance of an image displayed in the pixel area changes according to the voltage applied to the pixel electrode. Therefore, according to the above configuration, the luminance of the image in the pixel region in which the pixel electrode is formed can be changed to binary in the one scanning period.
- the moving image blur can be suppressed without using a frame memory for temporarily storing the image signal. Therefore, the manufacturing cost can be reduced as compared with the conventional configuration using the frame memory for temporarily storing the image signal. In addition, there is an effect that power consumption can be reduced as compared with a conventional configuration using a frame memory for temporarily storing image signals.
- the driving method includes a plurality of gate bus lines, a plurality of source bus lines, a plurality of counter electrode bus lines, and a gate connected to an arbitrary gate bus line among the plurality of gate bus lines.
- a transistor connected to an arbitrary source bus line of the plurality of source bus lines, a pixel electrode connected to the drain of the transistor, and a counter electrode facing the pixel electrode via liquid crystal
- An electrode connected to an arbitrary counter electrode bus line of the plurality of counter electrode bus lines, and connected to one end of each of the plurality of source bus lines, to the arbitrary source bus line
- a gate driver for sequentially supplying a conduction signal to be conducted to the arbitrary gate bus line, and a driving method for driving a display panel, wherein the gate driver is connected to the arbitrary gate bus line.
- the first voltage level and the first voltage are synchronized with the conduction signal with respect to the arbitrary counter electrode bus line.
- a voltage signal supplying step for supplying a rectangular voltage signal having a second voltage level different from the voltage level of the first voltage level.
- the display panel according to the present invention includes a plurality of gate bus lines, a plurality of source bus lines, a plurality of counter electrode bus lines, and the plurality of gate bus lines.
- a transistor having a gate connected to an arbitrary gate bus line, a source connected to an arbitrary source bus line of the plurality of source bus lines, a pixel electrode connected to a drain of the transistor, A counter electrode opposed to the pixel electrode through a liquid crystal, the counter electrode connected to an arbitrary counter electrode bus line of the plurality of counter electrode bus lines, and one end of each of the plurality of source bus lines
- a source driver that is connected and supplies a source signal to the arbitrary source bus line; and each of the plurality of gate bus lines.
- a gate driver that sequentially supplies a conduction signal for conducting the transistor to the arbitrary gate bus line, the gate driver being connected to the arbitrary gate bus.
- the first voltage level is synchronized with the conduction signal for the arbitrary counter electrode bus line.
- a counter electrode driver for supplying a rectangular voltage signal having a second voltage level different from the first voltage level.
- the moving image blur can be suppressed without using a frame memory for temporarily storing an image signal. Therefore, the manufacturing cost can be reduced as compared with the conventional configuration using the frame memory for temporarily storing the image signal. Further, power consumption can be reduced as compared with a conventional configuration using a frame memory for temporarily storing image signals.
- FIG. 3 is a circuit diagram showing a configuration of a pixel region of the display panel according to the first embodiment of the present invention.
- FIG. 2 is a diagram for explaining a first operation example of the display panel according to the first embodiment of the present invention, in which (a) is a timing chart showing a waveform of a source signal, and (b) is a gate. 2 is a timing chart showing the waveform of a signal, (c) is a timing chart showing the potential of the pixel electrode, and (d) is a timing chart showing the waveform of the counter electrode signal.
- FIG. 4 is a diagram for explaining a third operation example of the display panel according to the first embodiment of the present invention, in which (a) is a timing chart showing a waveform of a source signal, and (b) is a gate.
- FIG. 4 is a diagram for explaining a fourth operation example of the display panel according to the first embodiment of the present invention, in which (a) is a timing chart showing a waveform of a source signal, and (b) is a gate. 2 is a timing chart showing the waveform of a signal, (c) is a timing chart showing the potential of the pixel electrode, and (d) is a timing chart showing the waveform of the counter electrode signal.
- FIG. 4 is a diagram for explaining a fourth operation example of the display panel according to the first embodiment of the present invention, in which (a) is a timing chart showing a waveform of a source signal, and (b) is a gate. 2 is a timing chart showing the waveform of a signal, (c) is a timing chart showing the potential of the pixel electrode, and (d) is a timing chart showing the waveform of the counter electrode signal.
- FIG. 4 is a diagram for explaining a fourth operation example of the display panel according to the first embodiment of the present invention, in which (a
- FIG. 6 is a diagram for explaining a fifth operation example of the display panel according to the first embodiment of the present invention, in which (a) is a timing chart showing a waveform of a source signal, and (b) is a gate. 2 is a timing chart showing the waveform of a signal, (c) is a timing chart showing the potential of the pixel electrode, and (d) is a timing chart showing the waveform of the counter electrode signal.
- FIG. 9 is a diagram for explaining a sixth operation example of the display panel according to the first embodiment of the present invention, in which (a) is a timing chart showing a waveform of a source signal, and (b) is a gate.
- FIG. 2 is a timing chart showing the waveform of a signal
- (c) is a timing chart showing the potential of the pixel electrode
- (d) is a timing chart showing the waveform of the counter electrode signal.
- FIG. 10 is a diagram for explaining a seventh operation example of the display panel according to the first embodiment of the present invention, in which (a) is a timing chart showing a waveform of a gate signal, and (b) is a counter signal. It is a timing chart which shows the waveform of an electrode signal.
- BRIEF DESCRIPTION OF THE DRAWINGS It is for demonstrating the operation example of the display panel which concerns on the 1st Embodiment of this invention, Comprising: (a) is a timing chart which shows the waveform of a source signal, (b) is the waveform of a gate signal.
- (C) is a timing chart showing the potential of the pixel electrode, and (d) is a timing chart showing the waveform of the counter electrode signal having a certain duty ratio.
- FIG. 6 is a graph for explaining an example of the operation of the display panel according to the first embodiment of the present invention, and shows a relationship between the amplitude of the source signal and the luminance when the amplitude of the counter electrode signal is changed. is there. It is a block diagram which shows the structure of the counter electrode driver in the display panel which concerns on 1st Embodiment of this invention.
- FIG. 1 It is a block diagram which shows the structure of the display panel which concerns on the 2nd Embodiment of this invention. It is for demonstrating the operation example of the display panel which concerns on the 2nd Embodiment of this invention, Comprising: (a) is a timing chart which shows the waveform of a gate signal, (b) is a counter electrode signal. It is a timing chart which shows a waveform. It is a block diagram which shows the structure of the display panel which concerns on the 3rd Embodiment of this invention. It is a circuit diagram which shows the structure of the display part in the display panel which concerns on the 3rd Embodiment of this invention.
- Embodiment 1 The configuration of the display panel according to the first embodiment of the present invention will be described with reference to FIG. 1 and FIG.
- FIG. 1 is a block diagram showing a configuration of a display panel 1 according to the present embodiment.
- the display panel 1 is an active matrix type liquid crystal display panel.
- the display panel 1 includes a control unit 11, a source driver 12, a gate driver 13, a counter electrode driver 14, an auxiliary capacitance driver 15, and a display unit 16.
- the control unit 11 includes a control signal # 11a for controlling the source driver 12, a control signal # 11b for controlling the gate driver 13, a control signal # 11c for controlling the counter electrode driver 14, and a control signal for controlling the auxiliary capacitor driver 15. # 11d is output.
- N gate bus lines GL1 to GLN and M source bus lines SL1 to SLM are formed in a lattice shape so as to intersect each other.
- N counter electrode bus lines COML1 to COMLN are formed substantially parallel to the N gate bus lines GL1 to GLN.
- the display unit 16 is formed with a storage capacitor bus line CSL.
- the nth gate bus line is represented as a gate bus line GLn
- the mth source bus line is represented as a source bus line SLm
- the nth counter electrode bus line is represented as a counter electrode bus line COMLn.
- the display unit 16 includes a pixel region Pn, m defined by a gate bus line GLn (1 ⁇ n ⁇ N) and a source bus line SLm (1 ⁇ m ⁇ M). ing.
- the source driver 12 is connected to the ends of M source bus lines SL1 to SLM.
- the source driver 12 supplies source signals # SL1 to #SLM to the M source bus lines SL1 to SLM, respectively.
- the gate driver 13 is connected to the ends of N gate bus lines GL1 to GLN.
- the gate driver 13 supplies gate signals # GL1 to #GLN to the N gate bus lines GL1 to GLN, respectively.
- the counter electrode driver 14 is connected to the ends of N counter electrode bus lines COML1 to COMLN.
- the counter electrode driver 14 supplies counter electrode signals # COML1 to #COMLN to the N counter electrode bus lines COML1 to COMLN, respectively.
- auxiliary capacity driver 15 is connected to the end of the auxiliary capacity bus line CSL.
- the auxiliary capacitance driver 15 supplies the auxiliary capacitance potential VCS to the auxiliary capacitance bus line CSL.
- FIG. 2 is a circuit diagram showing the configuration of the display panel 1 in the pixel region Pn, m.
- the display panel 1 includes a transistor Mn, m having a gate connected to the gate bus line GLn and a source connected to the source bus line SLm in the pixel region Pn, m.
- the transistor Mn, m is, for example, a thin film transistor (TFT: Thin Film Transistor), but the present invention is not limited to a specific type of transistor.
- the transistor Mn, m is an example of a transistor that is in a conductive state when the potential applied to the gate is at a high level and is in a cutoff state when the potential applied to the gate is at a low level.
- the present invention is not limited to this. When the potential applied to the gate is low level, the conductive state is established, and when the potential applied to the gate is high level, the conductive state is established.
- the present invention can be applied even to a transistor.
- the pixel electrode PEn, m is connected to the drain of the transistor Mn, m.
- the display panel 1 includes a counter electrode ECOMn, m facing the pixel electrode PEn, m in the pixel region Pn, m, and the counter electrode ECOMn, m is connected to the counter electrode bus line COMLn.
- the display panel 1 includes a liquid crystal LC between the pixel electrode PEn, m and the counter electrode ECOMn, m, and a pixel capacitor CLC between the pixel electrode PEn, m and the counter electrode ECOMn, m. Is formed.
- An electric field is induced between the pixel electrode PEn, m and the counter electrode ECOMn, m according to the potential difference between the potential VPEn, m of the pixel electrode PEn, m and the potential VECOMn, m of the counter electrode ECOMn, m.
- the alignment of the liquid crystal LC is determined according to the magnitude of the electric field.
- the transmittance of the liquid crystal LC is determined according to the absolute value of the potential difference between the potential VPEn, m and the potential VECOMn, m.
- the present invention is not limited to this, and the potential difference is not limited to this.
- the present invention can be applied even in the case of normally white in which the transmittance of the liquid crystal LC becomes smaller as the absolute value of becomes larger. Note that when the transmittance of the liquid crystal LC is further increased, the luminance of the image displayed in the pixel region Pn, m including the liquid crystal LC is further increased.
- the first auxiliary capacitance electrode CE1n, m is connected to the drain of the transistor Mn, m in parallel with the pixel electrode PEn, m.
- the pixel region Pn, m includes a second auxiliary capacitance electrode CE2n, m connected to the auxiliary capacitance bus line CSL so as to face the first auxiliary capacitance electrode CE1n, m.
- An auxiliary capacitance CCS is formed in parallel with the pixel capacitance CLC between the capacitance electrode CE1n, m and the second auxiliary capacitance electrode CE2n, m.
- the first auxiliary capacitance electrode CE1n, m and the second auxiliary capacitance electrode CE2n, m constitute a capacitor Cn, m having an auxiliary capacitance CCS.
- the present invention is not limited to this. That is, the present invention can be applied even when the pixel region Pn, m does not include the capacitor Cn, m.
- FIG. 3A is a timing chart showing an example of the waveform of the source signal #SLm supplied to the source bus line SLm.
- FIG. 3B is a timing chart showing the waveform of the gate signal #GLn supplied to the gate bus line GLn.
- FIG. 3 is a timing chart showing the potential VPEn, m of the liquid crystal electrode PEn, m.
- FIG. 3D is a timing chart showing the waveform of the counter electrode signal #COMLn supplied to the counter electrode bus line COMLn.
- the counter electrode signal #COMLn is a signal that alternately takes the potential VCOM1 and the potential VCOM2 with two consecutive vertical scanning periods Tv as one cycle. More specifically, as shown in FIG. 3D, the counter electrode signal #COMLn takes the potential VCOM2 in the period T1 in one vertical scanning period Tv and takes the potential VCOM2 in the period T2. The counter electrode signal #COMLn takes the potential VCOM1 in the period T3 in the subsequent vertical scanning period Tv and takes the potential VCOM2 in the period T4. Note that as shown in FIG. 3D, specific values of the potential VCOM1 and the potential VCOM2 satisfy VCOM1 ⁇ VCOM2.
- the voltage applied to the liquid crystal LC is a difference voltage between the potential applied to the pixel electrode PEn, m and the potential applied to the counter electrode ECOMn, m (the same applies hereinafter).
- one vertical scanning period Tv includes a boundary time at the start of the period but does not include a boundary time at the end of the period. That is, in FIG. 3D, one vertical scanning period Tv is defined as a set of time t satisfying t2 ⁇ t ⁇ t5 or a set of time t satisfying t5 ⁇ t ⁇ t8. (Same below).
- the gate signal #GLn rises from a low level to a high level, and falls to a low level after a certain period of time.
- the transistor Mn, m becomes conductive.
- the source signal #SLm is supplied to the pixel electrode PEn, m and the first auxiliary capacitance electrode CE1n, m.
- the potential VPEn, m of the pixel electrode PEn, m increases from the potential V1 to the potential V2 (V2> VCOM2).
- the counter electrode signal #COMLn falls from the potential VCOM2 to the potential VCOM1. That is, the potential of the counter electrode ECOMn, m falls from the potential VCOM2 to the potential VCOM1.
- the gate signal #GLn is at a low level
- the transistor Mn, m is in a cut-off state. Therefore, the sum of the charge accumulated in the pixel electrode PEn, m and the charge accumulated in the first auxiliary capacitance electrode CE1n, m is unchanged.
- the value of the counter electrode signal #COMLn changes, the respective charges accumulated in the pixel electrode PEn, m and the first auxiliary capacitance electrode CE1n, m change.
- the potential VPEn, m of the pixel electrode PEn, m changes from the potential V2 to the potential V3.
- ⁇ C is the sum of the capacitances connected in parallel to the drains of the transistors Mn, m.
- ⁇ C CLC + CCS.
- a capacitance (parasitic capacitance) Cgd exists between the drain of the transistor Mn, m and the gate bus line GLn, and the drain of the transistor Mn, m and the source bus line SLm. Between the two, there is a capacitance (parasitic capacitance) Csd.
- ⁇ C CLC + CCS + Cgd + Csd.
- ⁇ C CLC + CCS + Cgd + Csd + Cext (the same applies hereinafter).
- V3 ⁇ VCOM1 ⁇ (V2 ⁇ VCOM2) (VCOM2 ⁇ VCOM1) ⁇ ( ⁇ C ⁇ CLC) / ⁇ C Since VCOM1 ⁇ VCOM2 as described above, V3-VCOM1> V2-VCOM2 holds. That is, the potential difference between the potential VPEn, m of the pixel electrode PEn, m and the potential VECOMn, m of the counter electrode ECOMn, m in the period from time t3 to time t4 is the pixel electrode PEn, m in the period from time t2 to time t3.
- the luminance of the pixel region Pn, m in the period from time t3 to time t4 is larger than the luminance of the pixel region Pn, m in the period from time t2 to time t3.
- the gate signal #GLn rises from the low level to the high level, and falls to the low level after a predetermined period.
- the transistor Mn, m is in a conductive state, and the source signal #SLm is supplied to the pixel electrode PEn, m and the first auxiliary capacitance electrode CE1n, m.
- the counter electrode signal #COMLn rises from the potential VCOM1 to the potential VCOM2. That is, the potential of the counter electrode ECOMn, m rises from the potential VCOM1 to the potential VCOM2.
- the gate signal #GLn is at a low level
- the transistor Mn, m is in a cut-off state. Therefore, the sum of the charge accumulated in the pixel electrode PEn, m and the charge accumulated in the first auxiliary capacitance electrode CE1n, m is unchanged.
- the value of the counter electrode signal #COMLn changes, the respective charges accumulated in the pixel electrode PEn, m and the first auxiliary capacitance electrode CE1n, m change.
- the potential VPEn, m of the pixel electrode PEn, m changes from the potential V4 to the potential V1.
- VCOM1 ⁇ V4 (VCOM2 ⁇ VCOM1) ⁇ ( ⁇ C ⁇ CLC) / ⁇ C Since VCOM1 ⁇ VCOM2 as described above, VCOM2-V1> (VCOM1-V4) holds. That is, the potential difference between the potential VPEn, m of the pixel electrode PEn, m and the potential VECOMn, m of the counter electrode ECOMn, m in the period from time t6 to time t7 is the pixel electrode PEn, m in the period from time t5 to time t6.
- the luminance of the pixel region Pn, m in the period from time t6 to time t7 is larger than the luminance of the pixel region Pn, m in the period from time t5 to time t6.
- the operation after time t7 is the same as the operation after time t1 described above.
- the period in which the gate signal #GLn shown in FIG. 3B is at a high level is sufficiently shorter than one vertical scanning period Tv.
- the display panel 1 includes the plurality of gate bus lines GL1 to GLN, the plurality of source bus lines SL1 to SLM, the plurality of counter electrode bus lines COML1 to COMLN, and the plurality of gates.
- a transistor Mn, m having a gate connected to an arbitrary gate bus line GLn among the bus lines and a source connected to an arbitrary source bus line SLm among the plurality of source bus lines; and a drain of the transistor And a counter electrode facing the pixel electrode via a liquid crystal (liquid crystal LC) and connected to an arbitrary counter electrode bus line COMLn among the plurality of counter electrode bus lines.
- the counter electrode ECOMn, m is connected to one end of each of the plurality of source bus lines, and is connected to the arbitrary source bus line SLm.
- a source driver 12 that supplies a source signal #SLm and a conduction signal (high level period of the gate signal #GLn) that is connected to one end of each of the plurality of gate bus lines and makes the transistor conductive is set to the arbitrary gate bus line.
- a gate driver 13 for sequentially supplying GLn, the gate driver 13 supplying the conduction signal to the arbitrary gate bus line and then the next conduction signal.
- At least the first voltage level and the second voltage level different from the first voltage level that is, the arbitrary counter electrode bus line COMLn
- the display panel 1 can apply a binary voltage level to the pixel electrode connected to the arbitrary gate bus line via the transistor in the one scanning period. That is, the display panel 1 can change the luminance of the image in the pixel region Pn, m in which the pixel electrode PEn, m is formed to binary in the one scanning period.
- the moving image blur can be suppressed without using a frame memory for temporarily storing the image signal. Therefore, the manufacturing cost can be reduced as compared with the conventional configuration using the frame memory for temporarily storing the image signal. Further, power consumption can be reduced as compared with a conventional configuration using a frame memory for temporarily storing image signals.
- the counter electrode driver 14 transmits the conduction signal (gate signal) to the arbitrary counter electrode bus line COMLn in the one scanning period (one vertical scanning period Tv).
- a rectangular voltage signal (counter electrode signal #COMLn) having the first voltage level and the second voltage level is supplied in synchronization with the high level interval of #GLn.
- the light / dark switching is performed after a certain time has elapsed since the video data was updated in each of all the pixel regions on the screen. It can be carried out. Moreover, since the ratio of the display period with bright luminance and the display period with dark luminance can be made almost equal at any location on the screen, it is possible to effectively suppress moving image blur.
- the rectangular voltage signal (counter electrode signal #COMLn) is the first voltage level or the second voltage level in at least 10% of the one scanning period.
- the voltage level of one value that is, one voltage level of the potential VCOM1 or the potential VCOM2 is taken.
- the rectangular voltage signal (counter electrode signal #COMLn) has a period of approximately 10% of the one scanning period from the start of the one scanning period (one vertical scanning period Tv).
- one voltage level of the first voltage level or the second voltage level is taken, and after approximately 90% of the one scanning period has elapsed, the one scanning period ends.
- the other voltage level of the first voltage level or the second voltage level is taken.
- the liquid crystal when the rectangular voltage signal (counter electrode signal #COMLn) is at the first voltage level in the one scanning period (one vertical scanning period Tv).
- the polarity of the voltage applied to the liquid crystal and the polarity of the voltage applied to the liquid crystal when the rectangular voltage signal is at the second voltage level may be different from each other.
- m and the polarity of the voltage applied to the liquid crystal expressed by the difference between the potential of the counter electrode ECOMn, m may be different from each other.
- the absolute value of the potential difference between the first voltage level and the second voltage level may be less than or equal to twice the threshold voltage of the liquid crystal.
- of the potential difference between the potential VCOM1 and the potential VCOM2 may be less than twice the threshold voltage of the liquid crystal LC.
- the orientation of the liquid crystal is not affected even when a voltage lower than the threshold voltage is applied to the liquid crystal.
- the threshold voltage is a voltage at which the alignment of the liquid crystal starts to be affected (the same applies hereinafter).
- the threshold voltage can be defined as, for example, a voltage that is 1 / 100th of the saturation voltage at which the transmittance of the liquid crystal is saturated.
- VLC ⁇ VLC / 2
- VLC ⁇ VLC / 2 It is desirable to set Here, ⁇ VLC / 2 is equal to or lower than the threshold voltage VLCth, that is, ⁇ VLC / 2 ⁇ VLCth If so, black display can be performed regardless of whether the potential of the counter electrode signal #COMLn is the potential VCOM1 or the potential VCOM2. Therefore, VCOM2-VCOM1 ⁇ 2 ⁇ VLCth If so, black display can be performed regardless of whether the potential of the counter electrode signal #COMLn is the potential VCOM1 or the potential VCOM2.
- the voltage level of the rectangular voltage signal is the first level. Black display can be performed regardless of the voltage level or the second voltage level.
- the absolute value of the potential difference between the first voltage level and the second voltage level is not more than twice the threshold voltage of the liquid crystal. Whether the voltage level of the voltage signal is the first voltage level or the second voltage level, the alignment of the liquid crystal can be prevented from being affected.
- the voltage level of the rectangular voltage signal is the first voltage level. Even if it is, even if it is the said 2nd voltage level, there exists the further effect that a black display can be performed.
- FIG. 4A is a timing chart showing an example of the waveform of the source signal #SLm supplied to the source bus line SLm.
- the waveform is almost the same as the waveform of the source signal #SLm shown in FIG. It is.
- FIG. 4B is a timing chart showing the waveform of the gate signal #GLn supplied to the gate bus line GLn. As shown in FIG. 4B, the description will be made assuming that the waveform of the gate signal #GLn in this operation example is the same as the waveform of the gate signal #GLn shown in FIG.
- (C) of FIG. 4 is a timing chart showing the potential VPEn, m of the liquid crystal electrode PEn, m.
- FIG. 4D is a timing chart showing the waveform of the counter electrode signal #COMLn supplied to the counter electrode bus line COMLn.
- the counter electrode signal #COMLn in the present operation example has the potential VCOM1 ′, the potential VCOM2 ′, and the potential VCOM3 ′ with two consecutive vertical scanning periods Tv ′ as one cycle. It is a signal to take. More specifically, as shown in FIG. 4D, the counter electrode signal #COMLn takes the potential VCOM2 ′ in the period T1 ′ in one vertical scanning period Tv ′ and takes the potential VCOM1 ′ in the period T2 ′. .
- the counter electrode signal #COMLn takes the potential VCOM2 'in the subsequent period T3' in the vertical scanning period Tv 'and takes the potential VCOM3' in the period T4 '.
- specific values of the potential VCOM1 ', the potential VCOM2', and the potential VCOM2 ' satisfy VCOM1' ⁇ VCOM2 ' ⁇ VCOM3'.
- the gate signal #GLn rises from a low level to a high level, and falls to a low level after a certain period.
- the transistor Mn, m becomes conductive.
- the source signal #SLm is supplied to the pixel electrode PEn, m and the first auxiliary capacitance electrode CE1n, m.
- the potential VPEn, m of the pixel electrode PEn, m is from potential V1 ′ to potential V2 ′ (V2 ′> VCOM3 ′). To increase.
- the counter electrode signal #COMLn falls from the potential VCOM3 ′ to the potential VCOM2 ′.
- the gate signal #GLn is at a low level
- the transistor Mn, m is in a cut-off state. Therefore, the sum of the charge accumulated in the pixel electrode PEn, m and the charge accumulated in the first auxiliary capacitance electrode CE1n, m is unchanged.
- the value of the counter electrode signal #COMLn changes, the respective charges accumulated in the pixel electrode PEn, m and the first auxiliary capacitance electrode CE1n, m change.
- the potential VPEn, m of the pixel electrode PEn, m changes from the potential V2 ′ to the potential V3 ′.
- the counter electrode signal #COMLn falls from the potential VCOM2 ′ to the potential VCOM1 ′. Accordingly, the potential VPEn, m of the pixel electrode PEn, m changes from the potential V3 ′ to the potential V4 ′.
- the potential difference between the potential VPEn, m of the pixel electrode PEn, m and the potential VECOMn, m of the counter electrode ECOMn, m in the period from the time t3 ′ to the time t4 ′ is in the period from the time t2 ′ to the time t3 ′. It is larger than the potential difference between the potential VPEn, m of the pixel electrode PEn, m and the potential VECOMn, m of the counter electrode ECOMn, m.
- the luminance of the pixel region Pn, m in the period from time t3 ′ to time t4 ′ is larger than the luminance of the pixel region Pn, m in the period from time t2 ′ to time t3 ′.
- the gate signal #GLn rises from the low level to the high level, and falls to the low level after a predetermined period.
- the transistor Mn, m is in a conductive state, and the source signal #SLm is supplied to the pixel electrode PEn, m and the first auxiliary capacitance electrode CE1n, m.
- the potential VPEn, m of the pixel electrode PEn, m is from potential V4 ′ to potential V5 ′ (V5 ′ ⁇ VCOM1 ′). Decrease.
- the counter electrode signal #COMLn rises from the potential VCOM1 ′ to the potential VCOM2 ′. Accordingly, the potential VPEn, m of the pixel electrode PEn, m changes from the potential V5 ′ to the potential V6 ′.
- the counter electrode signal #COMLn rises from the potential VCOM2 ′ to the potential VCOM3 ′.
- the potential VPEn, m of the pixel electrode PEn, m changes from the potential V6 ′ to the potential V1 ′.
- the potential difference between the potential VPEn, m of the pixel electrode PEn, m and the potential VECOMn, m of the counter electrode ECOMn, m in the period from time t6 ′ to time t7 ′ is the period from time t5 ′ to time t6 ′. It is larger than the potential difference between the potential VPEn, m of the pixel electrode PEn, m and the potential VECOMn, m of the counter electrode ECOMn, m.
- the luminance of the pixel region Pn, m in the period from time t6 ′ to time t7 ′ is larger than the luminance of the pixel region Pn, m in the period from time t5 ′ to time t6 ′.
- the operation after time t7 ' is the same as the operation after time t1' described above.
- the counter electrode signal #COMLn falls from the potential VCOM3 ′ to the potential VCOM2 ′ at time t2 ′, and the counter electrode signal #COMLn changes from the potential VCOM1 ′ to the potential VCOM2 at time t5 ′.
- the counter electrode signal #COMLn is generated from the potential VCOM3 ′ until several horizontal periods (multiple times the horizontal period Th) elapse from the time t2 ′.
- the potential falls to the potential VCOM2 ′, and rises from the potential VCOM1 ′ to the potential VCOM2 ′ from the time t5 ′ to the passage of several horizontal periods (multiple times the horizontal period Th).
- the counter electrode driver 14 synchronizes with the conduction signal with respect to the arbitrary counter electrode bus line in the one scanning period (one vertical scanning period Tv ′).
- a rectangular voltage signal (counter electrode signal) comprising the first voltage level, the second voltage level, and a third voltage level different from any of the first voltage level and the second voltage level. #COMLn).
- the counter electrode driver 14 supplies a rectangular voltage signal (counter electrode signal #COMLn) composed of the potential VCOM1 ′, the potential VCOM2 ′, and the potential VCOM3 ′ in one vertical scanning period. To do.
- a ternary voltage level can be applied to the pixel electrode connected to the arbitrary gate bus line via the transistor in the one scanning period.
- the voltage level applied to the pixel electrode transitions twice in the one scanning period.
- the voltage applied to the liquid crystal after the first transition of the voltage level by the first transition of the voltage level in the one scanning period is suitable for display after the first transition of the voltage level. It is possible to switch between high luminance and low luminance by the second transition of the voltage level.
- the gate driver 13 supplies the conduction signal (the high level period of the gate signal #GLn) to the arbitrary gate bus line GLn
- the arbitrary counter electrode bus line COMLn is supplied.
- the counter electrode driver 14 applies the voltage to the arbitrary counter electrode bus line COMLn in the one scanning period.
- the rectangular voltage signal (counter electrode signal #COMLn) having a descending level is supplied.
- the counter electrode driver 14 performs the one scan period (one vertical scan period Tv ′) from the time t2 ′ to the time t5 ′ with respect to the counter electrode bus line COMLn.
- the counter electrode signal takes the voltage level VCOM2 'in the period T1' from the time t2 'to the time t3' and takes the voltage level VCOM1 '(VCOM1' ⁇ VCOM2 ') in the period T2' from the time t3 'to the time t5'.
- #COMLn is supplied.
- the rise from low luminance to high luminance is not possible due to the fact that the response of the liquid crystal has a finite time.
- a sufficient phenomenon occurs.
- the time required for the change from low luminance to high luminance is longer than the time required for the change from high luminance to low luminance.
- the above phenomenon can occur at the timing when the potential difference between the potential of the pixel electrode and the potential of the counter electrode increases.
- the gate driver when the gate driver supplies the conduction signal to the arbitrary gate bus line, the highest voltage level among the voltage levels is applied to the arbitrary counter electrode bus line.
- a voltage signal having a higher voltage level can be supplied to the pixel electrode in the one scanning period, and a voltage signal having a lower voltage level can be subsequently supplied.
- the potential difference between the potential of the pixel electrode and the potential of the counter electrode can be increased stepwise. As a result, the phenomenon that the rise from the low luminance to the high luminance, which may occur in the normally black method, becomes insufficient can be suppressed.
- the gate driver 13 supplies the conduction signal (the high level period of the gate signal #GLn) to the arbitrary gate bus line GLn
- the arbitrary counter electrode bus line COMLn is supplied.
- the counter electrode driver 14 applies the voltage to the arbitrary counter electrode bus line COMLn in the one scanning period.
- the rectangular voltage signal (counter electrode signal #COMLn) whose level is ascending is supplied.
- the counter electrode driver 14 performs the one scan period (one vertical scan period Tv ′) from the time t5 ′ to the time t8 ′ with respect to the counter electrode bus line COMLn.
- the counter electrode signal takes the voltage level VCOM2 ′ in the period T3 ′ from time t5 ′ to time t6 ′ and takes the voltage level VCOM3 ′ (VCOM3 ′> VCOM2 ′) in the period T4 ′ from time t6 ′ to time t8 ′.
- #COMLn is supplied.
- the rise from low luminance to high luminance is not possible due to the fact that the response of the liquid crystal has a finite time.
- a sufficient phenomenon occurs.
- the time required for the change from low luminance to high luminance is longer than the time required for the change from high luminance to low luminance.
- the above phenomenon can occur at the timing when the potential difference between the potential of the pixel electrode and the potential of the counter electrode increases.
- the gate driver when the gate driver supplies the conduction signal to the arbitrary gate bus line, the lowest voltage level among the voltage levels is set to the arbitrary counter electrode bus line.
- a voltage signal having a lower voltage level can be supplied to the pixel electrode in the one scanning period, and a voltage signal having a higher voltage level can be subsequently supplied.
- the potential difference between the potential of the pixel electrode and the potential of the counter electrode can be increased stepwise. As a result, the phenomenon that the rise from the low luminance to the high luminance, which may occur in the normally black method, becomes insufficient can be suppressed.
- the rectangular voltage signal (counter electrode signal #COMLn) is the first voltage level in the period of at least 10 percent of the one scanning period (one vertical scanning period Tv ′). It is preferable to take any one of the second voltage level and the third voltage level.
- the rectangular voltage signal (counter electrode signal #COMLn) is supplied with the potential VCOM1 ′ and the potential VCOM2 ′ during at least 10 percent of the one scanning period (one vertical scanning period Tv ′).
- the voltage level of the potential VCOM3 ′ is preferably taken.
- the rectangular voltage signal has the first voltage level, the second voltage level, or the third voltage level in a period of at least 10 percent of the one scanning period. Among them, since any one of the voltage levels is taken, the above-mentioned motion blur phenomenon can be effectively suppressed.
- the one scanning period (one vertical scanning period Tv ′)
- it is represented by the difference between the potential of the pixel electrode and the potential of the counter electrode after the first transition of the voltage level.
- the polarity of the applied voltage to the liquid crystal, and the polarity of the applied voltage to the liquid crystal expressed by the difference between the potential of the pixel electrode and the potential of the counter electrode after the next transition of the voltage level, It is good also as a structure which becomes a mutually different polarity.
- the first voltage level transition from the potential VCOM3 ′ to the potential VCOM2 ′ at the time t2 ′ of the counter electrode signal #COMLn.
- the polarity of the voltage applied to the liquid crystal after the transition to the liquid crystal and the transition to the liquid crystal after the next voltage level transition transition from the potential VCOM2 ′ to the potential VCOM1 ′ at the time t3 ′ of the counter electrode signal #COMLn).
- the polarity of the applied voltage may be different from each other.
- the absolute value of the voltage applied to the liquid crystal is sufficiently set in the one scanning period even after the first voltage level transition or after the next voltage level transition. Can be made smaller.
- an intermediate voltage level (that is, the potential VCOM2 ′) among the first voltage level, the second voltage level, and the third voltage level, and the first voltage level
- the absolute value of the potential difference from the lowest voltage level (that is, the potential VCOM1 ′) among the voltage level of 1, the second voltage level, and the third voltage level is not more than twice the threshold voltage of the liquid crystal. It is good also as such a structure.
- an intermediate voltage level, the first voltage level, and the second voltage among the first voltage level, the second voltage level, and the third voltage level The absolute value of the potential difference with the lowest voltage level among the level and the third voltage level is not more than twice the threshold voltage of the liquid crystal, so that the voltage level of the rectangular voltage signal is the first voltage level. It is possible to prevent the alignment of the liquid crystal from being affected at any of the voltage level, the second voltage level, and the third voltage level.
- the voltage level of the rectangular voltage signal is the first voltage level
- FIG. 5A is a timing chart showing an example of the waveform of the source signal #SLm supplied to the source bus line SLm. As shown in FIG. 5A, the description will be made assuming that the waveform of the source signal #SLm in this operation example is substantially the same as the waveform of the source signal #SLm shown in FIG.
- FIG. 5B is a timing chart showing the waveform of the gate signal #GLn supplied to the gate bus line GLn. As shown in FIG. 5B, the description will be made assuming that the waveform of the gate signal #GLn in this operation example is the same as the waveform of the gate signal #GLn shown in FIG.
- FIG. 5 is a timing chart showing the potential VPEn, m of the liquid crystal electrode PEn, m.
- FIG. 5D is a timing chart showing the waveform of the counter electrode signal #COMLn supplied to the counter electrode bus line COMLn.
- the counter electrode signal #COMLn in the present operation example has a potential VCOM1 ′′, a potential VCOM2 ′′, and a potential VCOM3 ′ with two consecutive vertical scanning periods Tv ′′ as one cycle. 'And a potential VCOM4' '. More specifically, as shown in FIG. 5D, the counter electrode signal #COMLn takes the potential VCOM3 ′′ in the period T1 ′′ in one vertical scanning period Tv ′′ and the potential in the period T2 ′′. Take VCOM1 ''.
- the counter electrode signal #COMLn takes the potential VCOM2 "in the subsequent period T3" in the vertical scanning period Tv 'and takes the potential VCOM4 "in the period T4".
- specific values of the potential VCOM1 ′′, the potential VCOM2 ′′, the potential VCOM3 ′′, and the potential VCOM4 ′′ are VCOM1 ′′ ⁇ VCOM2 ′′ ⁇ VCOM3. ” ⁇ VCOM4”, VCOM4 ′′ ⁇ VCOM3 ′′ ⁇ VCOM3 ′′ ⁇ VCOM1 ′′, and VCOM2 ′′ ⁇ VCOM1 ′′ ⁇ VCOM4 ′′ ⁇ VCOM2 ′′ are satisfied.
- the gate signal #GLn rises from a low level to a high level, and falls to a low level after a predetermined period.
- the transistor Mn, m becomes conductive.
- the source signal #SLm is supplied to the pixel electrode PEn, m and the first auxiliary capacitance electrode CE1n, m.
- the potential VPEn, m of the pixel electrode PEn, m is changed from the potential V1 ′′ to the potential V2 ′′ (V2 ′′). > VCOM4 '').
- the counter electrode signal #COMLn falls from the potential VCOM4 ′′ to the potential VCOM3 ′′. Accordingly, the potential VPEn, m of the pixel electrode PEn, m changes from the potential V2 ′′ to the potential V3 ′′.
- the counter electrode signal #COMLn falls from the potential VCOM3 ′′ to the potential VCOM1 ′′. Accordingly, the potential VPEn, m of the pixel electrode PEn, m changes from the potential V3 ′′ to the potential V4 ′′.
- the potential difference between the potential VPEn, m of the pixel electrode PEn, m and the potential VECOMn, m of the counter electrode ECOMn, m during the period from time t3 ′′ to time t4 ′′ is from time t2 ′′ to time t3 ′′.
- This is larger than the potential difference between the potential VPEn, m of the pixel electrode PEn, m and the potential VECOMn, m of the counter electrode ECOMn, m in the period up to.
- the luminance of the pixel region Pn, m in the period from time t3 ′′ to time t4 ′′ is larger than the luminance of the pixel region Pn, m in the period from time t2 ′′ to time t3 ′′.
- the gate signal #GLn rises from the low level to the high level, and falls to the low level after a certain period.
- the transistor Mn, m is in a conductive state, and the source signal #SLm is supplied to the pixel electrode PEn, m and the first auxiliary capacitance electrode CE1n, m.
- the counter electrode signal #COMLn rises from the potential VCOM1 ′′ to the potential VCOM2 ′′. Accordingly, the potential VPEn, m of the pixel electrode PEn, m changes from the potential V5 ′′ to the potential V6 ′′.
- the counter electrode signal #COMLn rises from the potential VCOM2 ′′ to the potential VCOM4 ′′.
- the potential VPEn, m of the pixel electrode PEn, m changes from the potential V6 ′′ to the potential V1 ′′.
- VCOM2 ′′ ⁇ VCOM4 ′′ the potential V1 ′′ is higher than the potential V6 ′′.
- the potential difference between the potential VPEn, m of the pixel electrode PEn, m and the potential VECOMn, m of the counter electrode ECOMn, m in the period from time t6 ′′ to time t7 ′′ is from time t5 ′′ to time t6 ′′.
- This is larger than the potential difference between the potential VPEn, m of the pixel electrode PEn, m and the potential VECOMn, m of the counter electrode ECOMn, m in the period up to.
- the luminance of the pixel region Pn, m in the period from time t6 ′′ to time t7 ′′ is larger than the luminance of the pixel region Pn, m in the period from time t5 ′′ to time t6 ′′.
- the operation after time t7 ′′ is the same as the operation after time t1 ′′ described above.
- the counter electrode signal #COMLn falls from the potential VCOM4 ′′ to the potential VCOM3 ′′ at the time t2 ′′, and the counter electrode signal #COMLn becomes the potential VCOM1 at the time t5 ′′.
- the counter electrode signal #COMLn is until several horizontal periods (multiple times the horizontal period Th) elapse from time t2 ′′. Falls from the potential VCOM4 '' to the potential VCOM3 '', and from the time t5 '' to the potential VCOM2 '' from the potential VCOM1 '' until several horizontal periods (multiple times the horizontal period Th) elapse. Stand up until.
- the counter electrode driver 14 sets the first voltage level to the arbitrary counter electrode bus line COMLn in the one scanning period (vertical scanning period Tv ′′). Supplying a rectangular voltage signal comprising the second voltage level and a third voltage level different from any of the first voltage level and the second voltage level; In one scanning period, any two voltage levels among the first voltage level, the second voltage level, and the third voltage level, the first voltage level, and the second voltage level A rectangular voltage signal having a level and a fourth voltage level different from any of the third voltage levels is supplied.
- the counter electrode driver 14 is a rectangular voltage composed of the potential VCOM1 ′′, the potential VCOM2 ′′, the potential VCOM3 ′′, and the potential VCOM4 ′′ in two consecutive vertical scanning periods.
- a signal (counter electrode signal #COMLn) is supplied.
- the counter electrode driver is configured such that the first voltage level and the second voltage are synchronized with the conduction signal with respect to the arbitrary counter electrode bus line in the one scanning period. Since a rectangular voltage signal having a level and a third voltage level different from any of the first voltage level and the second voltage level can be supplied, the pixel electrode can be supplied during the one scanning period.
- the voltage level applied to is changed to a ternary value. In other words, the voltage level applied to the pixel electrode transitions twice in the one scanning period.
- the voltage applied to the liquid crystal after the first transition of the voltage level by the first transition of the voltage level in the one scanning period is suitable for display after the first transition of the voltage level. It is possible to switch between high luminance and low luminance by the second transition of the voltage level.
- any one of the first voltage level, the second voltage level, and the third voltage level in one scanning period following the one scanning period is selected. Since a rectangular voltage signal comprising a voltage level and a fourth voltage level different from any of the first voltage level, the second voltage level, and the third voltage level can be supplied. Compared to a case where a rectangular voltage signal composed of the first voltage level, the second voltage level, and the third voltage level is supplied in one scanning period following the one scanning period. In addition, the brightness levels of high brightness and low brightness can be adjusted more flexibly.
- of the voltage level before and after the first transition of the voltage level in the one scanning period is The absolute value of the potential difference of the voltage level before and after the next transition of the voltage level in the one scanning period is smaller than
- represents the absolute value of a.
- the change in the luminance of the pixel region Pn, m accompanying the transition of the voltage level of the counter electrode signal #COMLn at time t3 ′′ is represented by the voltage level of the counter electrode signal #COMLn at time t2 ′′. It can be made larger than the change in luminance of the pixel region Pn, m accompanying the transition.
- the moving image blur phenomenon can be more effectively suppressed.
- Tv ′′ from time t5 ′′ to time t8 ′′.
- the rectangular voltage signal (counter electrode signal #COMLn) is the first voltage level during the period of at least 10 percent of the one scanning period (vertical scanning period Tv ′′). Any one of the second voltage level, the third voltage level, and the fourth voltage level (that is, the potential VCOM1 ′′, the potential VCOM2 ′′, the potential VCOM3 ′′, and the potential) It is preferable to take any voltage level of VCOM4 ′′.
- the rectangular voltage signal is output from the first voltage level, the second voltage level, the third voltage level, or at least 10% of the one scanning period, or Since any one of the fourth voltage levels is taken, the motion blur phenomenon can be effectively suppressed.
- the applied voltage to the liquid crystal represented by the difference between the potential of the pixel electrode and the potential of the counter electrode after the first transition of the voltage level in the one scanning period.
- the polarity of the voltage applied to the liquid crystal expressed by the difference between the potential of the pixel electrode and the potential of the counter electrode after the next transition of the voltage level is different from each other. Is preferred.
- the absolute value of the voltage applied to the liquid crystal is sufficiently set in the one scanning period even after the first voltage level transition or after the next voltage level transition. Can be made smaller.
- the first transition of the voltage level (from the potential VCOM4 ′′ to the potential VCOM3 at time t2 ′′ of the counter electrode #COMLn). ”)
- the polarity of the voltage applied to the liquid crystal represented by the difference between the potential of the pixel electrode and the potential of the counter electrode, and the next transition of the voltage level (time of the counter electrode #COMLn).
- the polarity of the voltage applied to the liquid crystal expressed by the difference between the potential of the pixel electrode and the potential of the counter electrode after the transition from the potential VCOM3 ′′ to the potential VCOM1 ′′ at t3 ′′ is different from each other. It is good also as a structure which becomes a polarity.
- the absolute value of the voltage applied to the liquid crystal is sufficiently set in the one scanning period even after the first voltage level transition or after the next voltage level transition. Can be made smaller.
- the second lowest voltage level among the first voltage level, the second voltage level, the third voltage level, and the fourth voltage level ( That is, the potential VCOM2 ′′) and the highest voltage level among the first voltage level, the second voltage level, the third voltage level, and the fourth voltage level (that is, the potential VCOM4 ′′).
- the absolute value of the potential difference with respect to () may be less than twice the threshold voltage of the liquid crystal.
- the second lowest voltage level among the first voltage level, the second voltage level, the third voltage level, and the fourth voltage level, and the first voltage level The absolute value of the potential difference from the highest voltage level among the second voltage level, the second voltage level, the third voltage level, and the fourth voltage level is not more than twice the threshold voltage of the liquid crystal. Therefore, the voltage level of the rectangular voltage signal is the lowest voltage level among the first voltage level, the second voltage level, the third voltage level, and the fourth voltage level. Even if it is the highest voltage level among the first voltage level, the second voltage level, the third voltage level, and the fourth voltage level, the alignment of the liquid crystal is Be unaffected Door can be.
- Black display can be performed at any of the second voltage level, the third voltage level, and the fourth voltage level.
- FIG. 6A is a timing chart showing an example of the waveform of the source signal #SLm supplied to the source bus line SLm. As shown in FIG. 6A, the description will be made assuming that the waveform of the source signal #SLm in this operation example is substantially the same as the waveform of the source signal #SLm shown in FIG.
- FIG. 6B is a timing chart showing the waveform of the gate signal #GLn supplied to the gate bus line GLn. As shown in FIG. 6B, the description will be made assuming that the waveform of the gate signal #GLn in this operation example is the same as the waveform of the gate signal #GLn shown in FIG.
- FIG. 6 is a timing chart showing the potential VPEn, m of the liquid crystal electrode PEn, m.
- FIG. 6D is a timing chart showing the waveform of the counter electrode signal #COMLn supplied to the counter electrode bus line COMLn.
- the counter electrode signal #COMLn in this operation example is a signal that takes the potential VCOM11 and the potential VCOM12 with two consecutive vertical scanning periods Tv as one cycle. More specifically, as shown in FIG. 6D, the counter electrode signal #COMLn takes the potential VCOM11 in the period T11 in one vertical scanning period Tv, and the potential VCOM12 from the time t13 to the time t14 in the period T12. Thus, the potential VCOM11 is taken from the time t14 to the time t15 in the period T12.
- the counter electrode signal #COMLn takes the potential VCOM12 in the period T13 in the subsequent vertical scanning period Tv, takes the potential VCOM11 in the period T14 from the time t16 to the time t17, and takes the potential VCOM12 in the period T14 from the time t17 to the time t18. Take. Note that, as illustrated in FIG. 6D, specific values of the potential VCOM11 and the potential VCOM12 satisfy VCOM11 ⁇ VCOM12.
- the gate signal #GLn rises from a low level to a high level, and falls to a low level after a certain period.
- the transistor Mn, m becomes conductive.
- the source signal #SLm is supplied to the pixel electrode PEn, m and the first auxiliary capacitance electrode CE1n, m.
- the potential VPEn, m of the pixel electrode PEn, m increases from the potential V11 to the potential V12 (V12> VCOM12).
- the counter electrode signal #COMLn falls from the potential VCOM12 to the potential VCOM11. Accordingly, the potential VPEn, m of the pixel electrode PEn, m changes from the potential V12 to the potential V13.
- the counter electrode signal #COMLn rises from the potential VCOM11 to the potential VCOM12. Accordingly, the potential VPEn, m of the pixel electrode PEn, m changes from the potential V13 to the potential V12.
- the luminance of the pixel region Pn, m in the period from time t13 to time t14 is smaller than the luminance of the pixel region Pn, m in the period from time t12 to time t13.
- the gate signal #GLn rises from the low level to the high level, and falls to the low level after a predetermined period.
- the transistor Mn, m is in a conductive state, and the source signal #SLm is supplied to the pixel electrode PEn, m and the first auxiliary capacitance electrode CE1n, m.
- the counter electrode signal #COMLn falls from the potential VCOM12 to the potential VCOM11.
- the counter electrode signal #COMLn rises from the potential VCOM11 to the potential VCOM12. Accordingly, the potential VPEn, m of the pixel electrode PEn, m changes from the potential V11 to the potential V14.
- the counter electrode signal #COMLn falls from the potential VCOM12 to the potential VCOM11. Accordingly, the potential VPEn, m of the pixel electrode PEn, m changes from the potential V14 to the potential V11.
- the luminance of the pixel region Pn, m in the period from time t16 to time t17 is smaller than the luminance of the pixel region Pn, m in the period from time t15 to time t16.
- the gate signal #GLn rises from the low level to the high level, and falls to the low level after a predetermined period.
- the counter electrode signal #COMLn rises from the potential VCOM11 to the potential VCOM12. The operation after time t17 is the same as the operation after time t11 described above.
- the counter electrode signal #COMLn falls from the potential VCOM12 to the potential VCOM11 at the time t12 and rises from the potential VCOM11 to the potential VCOM12 at the time t15.
- the counter electrode signal #COMLn falls from the potential VCOM12 to the potential VCOM11 until several horizontal periods (multiple times the horizontal period Th) elapse from the time t12, and several horizontal periods (horizontal periods) from the time t15.
- the voltage rises from the potential VCOM11 to the potential VCOM12 until a period (multiple times Th) elapses.
- the counter electrode signal #COMLn falls from the potential VCOM12 to the potential VCOM11 at the time t14. More generally, the counter electrode signal #COMLn is output from the time t13. Before the time t15, the potential falls from the potential VCOM12 to the potential VCOM11.
- the luminance of the pixel region Pn, m in the second half of one vertical scanning period is smaller than the luminance of the pixel region Pn, m in the first half of the one vertical scanning period.
- FIG. 7A is a timing chart showing an example of the waveform of the source signal #SLm supplied to the source bus line SLm. As shown in FIG. 7A, the description will be made assuming that the waveform of the source signal #SLm in this operation example is substantially the same as the waveform of the source signal #SLm shown in FIG.
- FIG. 7B is a timing chart showing the waveform of the gate signal #GLn supplied to the gate bus line GLn. As shown in FIG. 7B, the description will be made assuming that the waveform of the gate signal #GLn in this operation example is the same as the waveform of the gate signal #GLn shown in FIG.
- FIG. 7 is a timing chart showing the potential VPEn, m of the liquid crystal electrode PEn, m.
- FIG. 7D is a timing chart showing the waveform of the counter electrode signal #COMLn supplied to the counter electrode bus line COMLn.
- the counter electrode signal #COMLn in this example of operation has the potential VCOM11 ′, the potential VCOM12 ′, and the potential VCOM13 ′ as one cycle of two consecutive vertical scanning periods Tv ′. It is a signal to take. More specifically, as shown in FIG. 7 (d), the counter electrode signal #COMLn takes the potential VCOM11 'in the period T11' in one vertical scanning period Tv ', and starts from the time t13' in the period T12 '.
- the potential VCOM12 ′ is taken at t14 ′, and the potential VCOM11 ′ is taken from time t14 ′ to time t15 ′ in the period T12 ′.
- the counter electrode signal #COMLn takes the potential VCOM13 ′ in the subsequent period T13 ′ in the vertical scanning period Tv ′, takes the potential VCOM12 ′ in the period T14 ′ from the time t16 ′ to the time t17 ′, and takes the time in the period T14 ′.
- the potential VCOM13 ′ is taken from t17 ′ to time t18 ′.
- specific values of the potential VCOM11 ', the potential VCOM12', and the potential VCOM13 ' satisfy VCOM11' ⁇ VCOM12 ' ⁇ VCOM13'.
- the gate signal #GLn rises from a low level to a high level, and falls to a low level after a certain period of time.
- the transistor Mn, m becomes conductive.
- the source signal #SLm is supplied to the pixel electrode PEn, m and the first auxiliary capacitance electrode CE1n, m.
- the potential VPEn, m of the pixel electrode PEn, m is from potential V11 ′ to potential V12 ′ (V12 ′> VCOM13 ′). To increase.
- the counter electrode signal #COMLn falls from the potential VCOM13 ′ to the potential VCOM11 ′. Accordingly, the potential VPEn, m of the pixel electrode PEn, m changes from the potential V12 ′ to the potential V13 ′.
- the counter electrode signal #COMLn rises from the potential VCOM11 ′ to the potential VCOM12 ′.
- the potential VPEn, m of the pixel electrode PEn, m changes from the potential V13 ′ to the potential V14 ′.
- the potential difference between the potential VPEn, m of the pixel electrode PEn, m and the potential VECOMn, m of the counter electrode ECOMn, m during the period from time t13 ′ to time t14 ′ is the period from time t12 ′ to time t13 ′. It is smaller than the potential difference between the potential VPEn, m of the pixel electrode PEn, m and the potential VECOMn, m of the counter electrode ECOMn, m.
- the luminance of the pixel region Pn, m in the period from time t13 ′ to time t14 ′ is smaller than the luminance of the pixel region Pn, m in the period from time t12 ′ to time t13 ′.
- the gate signal #GLn rises from the low level to the high level, and falls to the low level after a predetermined period.
- the transistor Mn, m is in a conductive state, and the source signal #SLm is supplied to the pixel electrode PEn, m and the first auxiliary capacitance electrode CE1n, m.
- the counter electrode signal #COMLn falls from the potential VCOM12' to the potential VCOM11 '.
- the potential VPEn, m of the pixel electrode PEn, m is from potential V14 ′ to potential V15 ′ (V15 ′ ⁇ VCOM11 ′). Decrease.
- the counter electrode signal #COMLn rises from the potential VCOM11 ′ to the potential VCOM13 ′. Accordingly, the potential VPEn, m of the pixel electrode PEn, m changes from the potential V15 ′ to the potential V16 ′.
- the counter electrode signal #COMLn falls from the potential VCOM13 ′ to the potential VCOM12 ′. Accordingly, the potential VPEn, m of the pixel electrode PEn, m changes from the potential V16 ′ to the potential V11 ′.
- the potential difference between the potential VPEn, m of the pixel electrode PEn, m and the potential VECOMn, m of the counter electrode ECOMn, m in the period from time t16 ′ to time t17 ′ is the period from time t15 ′ to time t16 ′. It is smaller than the potential difference between the potential VPEn, m of the pixel electrode PEn, m and the potential VECOMn, m of the counter electrode ECOMn, m.
- the luminance of the pixel region Pn, m in the period from time t16 ′ to time t17 ′ is smaller than the luminance of the pixel region Pn, m in the period from time t15 ′ to time t16 ′.
- the gate signal #GLn rises from the low level to the high level, and falls to the low level after a predetermined period.
- the counter electrode signal #COMLn rises from the potential VCOM12' to the potential VCOM13 '.
- the operation after time t17 ' is the same as the operation after time t11' described above.
- the counter electrode signal #COMLn falls from the potential VCOM13 ′ to the potential VCOM11 ′ at time t12 ′ and rises from the potential VCOM11 ′ to the potential VCOM13 ′ at time t15 ′. More generally, however, the counter electrode signal #COMLn falls from the potential VCOM13 ′ to the potential VCOM11 ′ from the time t12 ′ to the passage of several horizontal periods (multiple times the horizontal period Th). The voltage rises from the potential VCOM11 ′ to the potential VCOM13 ′ from the time t15 ′ to the passage of several horizontal periods (multiple times the horizontal period Th).
- the counter electrode signal #COMLn falls from the potential VCOM12 ′ to the potential VCOM11 ′ at time t14 ′. More generally, the counter electrode signal #COMLn is Between time t13 'and time t15', the potential falls from potential VCOM12 'to potential VCOM11'.
- the luminance of the pixel region Pn, m in the second half of one vertical scanning period is smaller than the luminance of the pixel region Pn, m in the first half of the one vertical scanning period.
- the phenomenon of the moving image blur can be suppressed.
- the counter electrode signal #COMLn takes a ternary voltage level. Therefore, the moving image blurring phenomenon can be more effectively suppressed as compared to the above-described operation example 4.
- FIG. 8A is a timing chart showing an example of the waveform of the source signal #SLm supplied to the source bus line SLm. As shown in FIG. 8A, the description will be given assuming that the waveform of the source signal #SLm in this operation example is a waveform obtained by inverting the polarity of the source signal #SLm shown in FIG.
- FIG. 8B is a timing chart showing the waveform of the gate signal #GLn supplied to the gate bus line GLn. As shown in FIG. 8B, the description will be made assuming that the waveform of the gate signal #GLn in this operation example is substantially the same as the waveform of the gate signal #GLn shown in FIG.
- FIG. 8 is a timing chart showing the potential VPEn, m of the liquid crystal electrode PEn, m.
- FIG. 8D is a timing chart showing the waveform of the counter electrode signal #COMLn supplied to the counter electrode bus line COMLn.
- the counter electrode signal #COMLn in this operation example has the potential VCOM11 ′′, the potential VCOM12 ′′, and the potential VCOM13 ′ with two consecutive vertical scanning periods Tv ′′ as one cycle. 'And a potential VCOM14' '. More specifically, as shown in FIG. 8D, the counter electrode signal #COMLn takes the potential VCOM11 ′ in the period T11 ′′ in one vertical scanning period Tv ′′ and the time t13 in the period T12 ′′.
- the potential VCOM13 '' is taken, and from time t14 '' to time t16 '' in the period T12 '', the potential VCOM11 '' is taken.
- the counter electrode signal #COMLn takes the potential VCOM14 '' in the subsequent period T13 '' in the vertical scanning period Tv '' and the potential VCOM12 '' from the time t17 '' to the time t18 '' in the period T14 ''.
- the potential VCOM14 ′′ is taken from the time t18 ′′ to the time t20 ′′ in the period T14 ′′. As shown in FIG.
- the gate signal #GLn rises from the low level to the high level, and falls to the low level after a certain period.
- the transistor Mn, m becomes conductive.
- the source signal #SLm is supplied to the pixel electrode PEn, m and the first auxiliary capacitance electrode CE1n, m.
- the potential VPEn, m of the pixel electrode PEn, m is changed from the potential V11 ′′ to the potential V12 ′′ (V12 ′′). ⁇ VCOM14 ′′).
- the counter electrode signal #COMLn falls from the potential VCOM14 ′′ to the potential VCOM11 ′′. Accordingly, the potential VPEn, m of the pixel electrode PEn, m changes from the potential V12 ′′ to the potential V13 ′′.
- the counter electrode signal #COMLn rises from the potential VCOM11 ′′ to the potential VCOM13 ′′.
- the potential VPEn, m of the pixel electrode PEn, m changes from the potential V13 ′′ to the potential V14 ′′.
- VCOM11 ′′ ⁇ VCOM13 ′′ the potential V14 ′′ is higher than the potential V13 ′′.
- the potential difference between the potential VPEn, m of the pixel electrode PEn, m and the potential VECOMn, m of the counter electrode ECOMn, m in the period from time t13 ′′ to time t14 ′′ is from time t12 ′′ to time t13 ′′.
- This is larger than the potential difference between the potential VPEn, m of the pixel electrode PEn, m and the potential VECOMn, m of the counter electrode ECOMn, m in the period up to.
- the luminance of the pixel region Pn, m in the period from time t13 ′′ to time t14 ′′ is larger than the luminance of the pixel region Pn, m in the period from time t12 ′′ to time t13 ′′.
- the counter electrode signal #COMLn falls from the potential VCOM13 ′′ to the potential VCOM11 ′′. Accordingly, the potential VPEn, m of the pixel electrode PEn, m changes from the potential V14 ′′ to the potential V13 ′′.
- the gate signal #GLn rises from the low level to the high level, and falls to the low level after a certain period.
- the transistor Mn, m is in a conductive state, and the source signal #SLm is supplied to the pixel electrode PEn, m and the first auxiliary capacitance electrode CE1n, m.
- the counter electrode signal #COMLn rises from the potential VCOM11 ′′ to the potential VCOM14 ′′. Accordingly, the potential VPEn, m of the pixel electrode PEn, m changes from the potential V15 ′′ to the potential V11 ′′.
- the counter electrode signal #COMLn falls from the potential VCOM14 ′′ to the potential VCOM12 ′′.
- the potential VPEn, m of the pixel electrode PEn, m changes from the potential V11 ′′ to the potential V14 ′′.
- the potential V14 ′′ is smaller than the potential V11 ′′.
- the potential difference between the potential VPEn, m of the pixel electrode PEn, m and the potential VECOMn, m of the counter electrode ECOMn, m in the period from time t17 ′′ to time t18 ′′ is from time t16 ′′ to time t17 ′′.
- This is larger than the potential difference between the potential VPEn, m of the pixel electrode PEn, m and the potential VECOMn, m of the counter electrode ECOMn, m in the period up to.
- the luminance of the pixel region Pn, m in the period from time t17 ′′ to time t18 ′′ is larger than the luminance of the pixel region Pn, m in the period from time t16 ′′ to time t17 ′′.
- the counter electrode signal #COMLn rises from the potential VCOM12 ′′ to the potential VCOM14 ′′. Accordingly, the potential VPEn, m of the pixel electrode PEn, m changes from the potential V14 ′′ to the potential V11 ′′.
- the gate signal #GLn rises from the low level to the high level, and falls to the low level after a predetermined period.
- the operation after time t19 ′′ is the same as the operation after time t11 ′′ described above.
- the counter electrode signal #COMLn falls from the potential VCOM14 ′′ to the potential VCOM11 ′′ at time t12 ′′, and from the potential VCOM11 ′′ to the potential VCOM14 ′′ at time t16 ′′.
- the counter electrode signal #COMLn is more generally applied to the potential VCOM14 ′′ from the time t12 ′′ until several horizontal periods (multiple times the horizontal period Th) elapse.
- the display panel 1 according to the present invention can change the luminance of the pixel region Pn, m in one vertical scanning period.
- the phenomenon of the moving image blur can be suppressed.
- the counter electrode signal #COMLn takes a quaternary voltage level. Therefore, compared with the operation example 4 and the operation example 5, the phenomenon of the moving image blur can be more effectively suppressed.
- the gate signal #GLn supplied to the nth gate bus line GLn and the counter electrode signal #COMLn supplied to the nth counter electrode bus line COMLn are described as examples.
- the gate signal #GLp supplied to the non-nth gate bus line GLp (p ⁇ n) and the counter electrode signal # supplied to the non-nth counter electrode bus line COMLp (p ⁇ n) The same applies to COMLp.
- the counter electrode driver 14 in the display panel 1 supplies the counter electrode signal #COMLn to the counter electrode bus line COMLn in synchronization with the gate signal #GLn.
- the counter electrode driver 14 When the source signal #SLm is a polarity inversion signal as described above, that is, when the source signal #SLm is a signal that inverts the polarity every horizontal scanning period, the counter electrode driver 14 The polarity of the signal # COMLn + 1 is supplied by inverting the polarity of the counter electrode signal #COMLn.
- FIG. 9A is a timing chart showing an example of waveforms of gate signals #GLn to # GLn + 3 supplied to the gate bus lines GLn to GLn + 3, respectively
- FIG. FIG. 10 is a timing chart showing an example of the waveforms of the counter electrode signals #COMLn to # COMLn + 3 supplied to the counter electrode bus lines COMLn to COMLn + 3 in the operation example 1 described above
- c) is a timing chart showing an example of waveforms of the counter electrode signals #COMLn to # COMLn + 3 supplied to the counter electrode bus lines COMLn to COMLn + 3 in the operation example 2 described above.
- the counter electrode driver 14 Inverts the polarity of the counter electrode signal # COMLn + 1 with respect to the polarity of the counter electrode signal #COMLn. Supply.
- the counter electrode driver 14 applies the counter electrode signals #COMLn to # COMLn + 3 to the gate electrode #GLn to the counter electrode bus line COMLn. Supply in synchronization with # GLn + 3.
- the counter electrode driver 14 is preferably configured to supply a counter electrode signal with the polarity reversed for each of the plurality of counter electrode bus lines.
- the potential level of the source signal #SLm in the selection period is switched between the maximum potential level of the plurality of potential levels and the minimum potential level every two horizontal scanning periods. Let's take an example.
- FIG. 10A is a timing chart showing an example of waveforms of gate signals #GLn to # GLn + 3 supplied to the gate bus lines GLn to GLn + 3, respectively.
- FIG. 10 is a timing chart showing an example of waveforms of counter electrode signals #COMLn to # COMLn + 3 supplied to the counter electrode bus lines COMLn to COMLn + 3 in this operation example.
- the counter electrode driver 14 counters the counter electrode signal #COMLn and the counter electrode signal that are in phase with each other with respect to the counter electrode bus line COMLn and the counter electrode bus line COMLn + 1.
- # COMLn + 1 is supplied.
- the counter electrode driver 14 sets two adjacent counter electrode bus lines as a pair, and supplies a common counter electrode signal to the pair of counter electrode bus lines.
- the counter electrode driver 14 is connected to the pixel electrode PEn, m connected to the nth gate bus line GLn of the plurality of gate bus lines via the transistor Mn, m. Is connected to the counter electrode bus line COMLn to which the counter electrode ECOMn, m facing the gate is connected, and the n + 1th gate bus line GLn + 1 among the plurality of gate bus lines via the transistor Mn + 1, m.
- the rectangular voltage signal (counter electrode signal #COMLn) is connected to the counter electrode bus line COMLn + 1 to which the counter electrode ECOMn + 1, m facing the pixel electrode PEn + 1, m is connected. , And the counter electrode signal # COMLn + 1).
- the counter electrode signal #COMLn and the counter electrode signal # COMLn + 1 are the same in the counter electrode driver 14. What is necessary is just to produce
- the moving image blur phenomenon can be suppressed by the counter electrode driver 14 having a simpler configuration.
- the counter electrode driver 14 includes the pixel electrode PEn, connected to the nth gate bus line GLn among the plurality of gate bus lines via the transistor Mn, m.
- the rectangular voltage signal is synchronously supplied to the counter electrode bus line COMLn + 2 to which the counter electrode ECOMn + 2, m facing the connected pixel electrode PEn + 2, m is connected. It is good also as such a structure.
- the counter electrode bus line in which the counter electrode facing the pixel electrode connected to the nth gate bus line of the plurality of gate bus lines via the transistor is connected;
- the rectangular electrode bus line is connected to the counter electrode bus line connected to the pixel electrode connected to the n + 2th gate bus line of the plurality of gate bus lines via the transistor. Since the voltage signals can be supplied synchronously, the counter-electrode driver having a simpler configuration can suppress the occurrence of the moving image blur while suppressing the generation of streaks according to flicker and polarity inversion. .
- the counter electrode driver 14 may have a configuration in which three or more adjacent counter electrode bus lines are set as one set, and a common counter electrode signal is supplied to the one set of counter electrode bus lines.
- the display panel 1 has a rectangular counter electrode composed of a plurality of voltage levels in one vertical scanning period with respect to the counter electrode bus lines COML1 to COMLN.
- the luminance of the pixel region Pn, m is relatively high (hereinafter referred to as “bright period”), and the luminance of the pixel region Pn, m Can generate a relatively low period (hereinafter referred to as “dark period”).
- the length of the light period and the length of the dark period in one vertical scanning period can be adjusted by changing the duty ratio of the counter electrode signal #COMLn supplied by the counter electrode driver 14.
- the duty ratio of the counter electrode signal #COMLn refers to the voltage level of the counter electrode signal #COMLn in the one vertical scanning period in one vertical scanning period immediately after the positive applied voltage is applied to the liquid crystal. This is the ratio of the period in which the minimum voltage level is taken out of a plurality of voltage levels.
- the counter electrode signal in the one vertical scanning period This is the ratio of the period in which the voltage level of #COMLn takes the maximum voltage level among a plurality of voltage levels.
- the duty ratio corresponds to the ratio of the “bright period” in one vertical scanning period.
- FIG. 11A is a timing chart showing an example of the waveform of the source signal #SLm supplied to the source bus line SLm. As shown in FIG. 11A, the case where the waveform of the source signal #SLm is the same as that of the source signal #SLm shown in FIG.
- FIG. 11B is a timing chart showing the waveform of the gate signal #GLn supplied to the gate bus line GLn. As shown in FIG. 11B, the case where the waveform of the gate signal #GLn is substantially the same as the waveform of the gate signal #GLn shown in FIG.
- FIG. 11 is a timing chart showing the potential VPEn, m of the liquid crystal electrode PEn, m.
- FIG. 11 is a timing chart showing a waveform of the counter electrode signal #COMLn supplied to the counter electrode bus line COMLn and set so that the duty ratio is about 10%.
- the counter electrode signal #COMLn is a signal that takes the potential VCOM21, the potential VCOM22, and the potential VCOM23 with two consecutive vertical scanning periods Tv '' 'as one cycle. More specifically, as shown in FIG. 11 (d), the counter electrode signal #COMLn takes the potential VCOM22 in the period TB in one vertical scanning period Tv '' 'and takes the potential VCOM21 in the period TD.
- the counter electrode signal #COMLn takes the potential VCOM22 in the period TB in the subsequent vertical scanning period Tv ′′, and takes the potential VCOM23 in the period TD. Note that, as illustrated in FIG. 11D, specific values of the potential VCOM21, the potential VCOM22, and the potential VCOM23 satisfy VCOM21 ⁇ VCOM22 ⁇ VCOM23.
- the gate signal #GLn rises from the low level to the high level at time t21, and falls to the low level after a certain period.
- the potential VPEn, m of the pixel electrode PEn decreases from the potential V21 to the potential V22 (V22 ⁇ VCOM23).
- the counter electrode signal #COMLn falls from the potential VCOM23 to the potential VCOM22. Accordingly, the potential VPEn, m of the pixel electrode PEn, m changes from the potential V22 to the potential V23.
- the counter electrode signal #COMLn falls from the potential VCOM22 to the potential VCOM21. Accordingly, the potential VPEn, m of the pixel electrode PEn, m changes from the potential V23 to the potential V24.
- VCOM21 ⁇ V24 ⁇ (VCOM22 ⁇ V23) (VCOM21 ⁇ VCOM22) ⁇ ( ⁇ C ⁇ CLC) / ⁇ C Since VCOM21 ⁇ VCOM22 as described above, VCOM21 ⁇ V24 ⁇ VCOM22 ⁇ V23 holds. That is, the potential difference between the potential VPEn, m of the pixel electrode PEn, m and the potential VECOMn, m of the counter electrode ECOMn, m in the period from time t23 to time t24 is the pixel electrode PEn, m in the period from time t22 to time t23.
- the luminance of the pixel region Pn, m in the period from time t23 to time t24 is smaller than the luminance of the pixel region Pn, m in the period from time t22 to time t23.
- the voltage level of the counter electrode signal #COMLn is changed in one vertical scanning period Tv ′ ′′ immediately after the negative polarity source signal #SLm is applied.
- a relatively high period TB (period from time t22 to time t23) is about 10% of one vertical scanning period Tv ′ ′′, and the voltage level of the counter electrode signal #COMLn is relatively low.
- a period TD (period from time t23 to time t24) is about 90% of one vertical scanning period Tv ′ ′′. That is, the duty ratio of the counter electrode signal #COMLn shown in (d) of FIG. 11 is about 10 percent.
- the period TB shown in FIG. 11D corresponds to the “bright period”, and the period TD corresponds to the “dark period”.
- the counter electrode driver 14 supplies the counter electrode signal #COMLn having a duty ratio of about 10%, thereby setting a period of about 10% of one vertical scanning period as a “bright period” and about 90%. This period can be a “dark period”.
- FIG. 12D is a timing chart showing the waveform of the counter electrode signal #COMLn having a duty ratio of about 90%.
- the source signal #SLm shown in (a) of FIG. 12 and the gate signal #GLn shown in (b) of FIG. 12 are respectively the source signal #SLm shown in (a) of FIG. This is the same signal as the gate signal #GLn shown in b).
- FIG. 12C is a timing chart showing the potential VPEn, m of the liquid crystal electrode PEn, m.
- the voltage level of the counter electrode signal #COMLn in one vertical scanning period Tv ′ ′′ immediately after the negative polarity source signal #SLm is applied.
- a period TB ′ (a period from time t22 to time t23 ′), which is a relatively high period, is about 90% of one vertical scanning period Tv ′ ′′, and the voltage level of the counter electrode signal #COMLn is relative.
- a period TD (period from time t23 'to time t24), which is a very low period, is about 10% of one vertical scanning period Tv' ''. That is, the duty ratio of the counter electrode signal #COMLn shown in (d) of FIG. 12 is about 90%.
- a period TB ′ shown in FIG. 12D corresponds to a “bright period”
- a period TD ′ corresponds to a “dark period”.
- the counter electrode driver 14 supplies the counter electrode signal #COMLn having a duty ratio of about 90%, thereby setting a period of about 90% of one vertical scanning period as a “bright period” and about 10%. This period can be a “dark period”.
- the counter electrode driver 14 can change the ratio of the “light period” and the “dark period” in one vertical scanning period by changing the duty ratio of the counter electrode signal #COMLn.
- FIG. 13 is a graph showing the relationship between the duty ratio and the luminance.
- the vertical axis in FIG. 13 represents relative luminance with the minimum luminance being 0.0 and the maximum luminance being 1.0, and the horizontal axis in FIG. 13 represents the duty ratio.
- the relative luminance increases as the duty ratio increases.
- FIG. 14 is a graph of experimental data showing the relationship between the duty ratio and the visibility of a moving image displayed on the display panel 1.
- the vertical axis in FIG. 14 represents the visibility perceived by the observer observing the moving image displayed on the display panel 1 by a five-step evaluation. The higher the visibility, the clearer the moving image is by the observer. That is, it shows that the image is less blurred.
- the horizontal axis in FIG. 14 represents the above-described duty ratio.
- the black squares in FIG. 14 are experimental data corresponding to the highest evaluation among the visibility evaluations made by each of a plurality of observers, and the white triangles in FIG. 14 are a plurality of observations. 14 is experimental data corresponding to the lowest evaluation among the visibility evaluations made by each of the viewers, and the black triangles in FIG. 14 indicate the average values of the visibility evaluations made by each of the plurality of viewers. Show.
- the rectangular voltage signal (counter electrode signal #COMLn) has a period of approximately 10% of the one scanning period from the start of the one scanning period (one vertical scanning period Tv ′ ′′).
- one of the first voltage level, the second voltage level, and the third voltage level that is, the potential VCOM21, the potential VCOM22, or the potential VCOM23. Any one voltage level), and the first voltage level and the second voltage level in a period from the lapse of approximately 90% of the one scanning period to the end of the one scanning period.
- another voltage level of the third voltage level that is, another voltage level of the potential VCOM21, the potential VCOM22, or the potential VCOM23).
- the viewer does not feel the improvement of moving image blur when the display ratio of bright luminance is 90% or more, and between 90 and 10%.
- the rectangular voltage signal (counter electrode signal #COMLn) includes the first voltage level, the second voltage level, the third voltage level, and the fourth voltage level in two scanning periods. Even when the voltage level is taken, the rectangular voltage signal (counter electrode signal #COMLn) is in a period from the start of the one scanning period until approximately 10% of the one scanning period elapses. It takes any one of the first voltage level, the second voltage level, the third voltage level, or the fourth voltage level, and is a period of about 90% of the one scanning period. In the period from the elapse of the period until the end of the one scanning period, the first voltage level, the second voltage level, the third voltage level, or the fourth voltage level. Chi take other one voltage level, it is preferable.
- the viewer does not feel the improvement of moving image blur when the display ratio of bright luminance is 90% or more, and between 90 and 10%.
- the source driver 12 changes the amplitudes of the source signals # SL1 to #SLM according to the amplitudes of the counter electrode signals # COML1 to #COMLN. Such a configuration is preferable.
- FIG. 15A is a timing chart showing the waveform of the gate signal #GLn
- FIG. 15B is a timing chart showing the waveform of the counter electrode signal #COMLn having a smaller amplitude.
- FIG. 15C is a timing chart showing an example of a waveform of the potential VPEn, m applied to the pixel electrode PEn, m when the counter electrode signal #COMLn shown in FIG. 15B is supplied.
- FIG. 15D is a timing chart showing the waveform of the counter electrode signal #COMLn having a larger amplitude
- FIG. 15E is supplied with the counter electrode signal #COMLn shown in FIG. 6 is a timing chart showing an example of a waveform of a potential VPEn, m applied to the pixel electrode PEn, m.
- the amplitude A1 shown in (c) of FIG. 15 and the amplitude A2 shown in (e) of FIG. 15 represent the amplitude of the source signal #SLm.
- the counter electrode driver 14 supplies the counter electrode signal #COMLn having a smaller amplitude
- the counter electrode signal #COMLn having a larger amplitude
- FIG. 16 shows the relationship between the amplitude of the source signal #SLm and the luminance of the pixel region Pn, m when the amplitude of the counter electrode signal #COMLn is 1.0, 1.5, or 2.0 volts. It is a graph which shows.
- the vertical axis in FIG. 16 represents the amplitude of the source signal #SLm (unit: volts), and the horizontal axis in FIG. 16 represents the relative luminance with the lowest luminance being 0.0 and the highest luminance being 1.0.
- the solid line in FIG. 16 shows the case where the amplitude of the counter electrode signal #COMLn is 2.0 volts
- the dotted line in FIG. 16 shows the case where the amplitude of the counter electrode signal #COMLn is 1.5 volts.
- the thick line in FIG. 16 indicates the case where the amplitude of the counter electrode signal #COMLn is 1.0 volts.
- the source driver 12 supplies the source signal #SLm so that the rate of change in the amplitude of the source signal #SLm relative to the relative luminance is smaller.
- the source signal #SLm is supplied so that the rate of change of the amplitude of the source signal #SLm with respect to the relative luminance is increased.
- the relationship between the amplitude of the source signal #SLm and the amplitude of the counter electrode signal #COMLn varies depending on whether or not the amplitude of the source signal #SLm is less than the reference source amplitude SLST.
- the reference source amplitude SLST is a value of the amplitude of the source signal #SLm whose relative luminance remains unchanged even if the amplitude of the counter electrode signal #COMLn is changed.
- the relative luminance when the amplitude of the source signal #SLm is the reference source amplitude SLST will be referred to as a reference relative luminance BRST.
- a source having a smaller amplitude it is only necessary to supply the signal #SLm, and in order to keep the relative luminance constant in a range where the relative luminance is equal to or higher than the reference relative luminance BRST, a source having a larger amplitude when the amplitude of the counter electrode signal #COMLn is larger.
- the signal #SLm may be supplied.
- the source signal #SLm in order to keep the relative luminance constant when the amplitude of the source signal #SLm is less than the reference source amplitude SLST, when the counter electrode signal #COMLn is larger, the source signal having a smaller amplitude
- the amplitude is increased when the counter electrode signal #COMLn is larger in amplitude.
- a large source signal #SLm may be supplied.
- a specific configuration for supplying the rectangular counter electrode signals # COML1 to #COMLN having a plurality of voltage levels to the counter electrode bus lines COML1 to COMLN as described above is, for example, the counter electrode driver 14
- this can be realized by including a plurality of power supplies that supply the plurality of voltage levels and a selector that selects one of the voltage levels supplied from the plurality of power supplies.
- FIG. 17 is a block diagram showing a configuration of the counter electrode driver 14 for supplying the counter electrode signals # COML1 to #COMLN having four voltage levels.
- the counter electrode driver 14 includes a first power supply B1, a second power supply B2, a third power supply B3, and a fourth power supply B4. As shown in FIG. 17, the counter electrode driver 14 includes an nth selector SELn (1 ⁇ n ⁇ N) connected to the counter electrode bus line COMLn (1 ⁇ n ⁇ N).
- control signal # 11c output from the control unit 11 is supplied to the nth selector SELn.
- the fourth potential output from the power source 4 is supplied to the nth selector SELn (1 ⁇ n ⁇ N).
- the nth selector SELn selects any one of the first potential, the second potential, the third potential, and the fourth potential according to the control signal # 11c, and Supply to the electrode bus line COMLn.
- each of the DACs to which digital values corresponding to the first to fourth potentials are input may be used, or another configuration may be used.
- the counter electrode driver 14 in the display panel 1 includes amplitude changing means for changing the amplitude of the rectangular voltage signal (counter electrode signal #COMLn). preferable.
- the counter electrode driver 14 includes the amplitude changing means for changing the magnitude of the amplitude of the rectangular voltage signal, so that the phenomenon of moving image blur can be more effectively suppressed.
- the source driver 12 supplies the source signal #SLm having an amplitude smaller than a predetermined reference amplitude
- the amplitude of the rectangular voltage signal (counter electrode signal #COMLn) Is supplied when the amplitude of the rectangular voltage signal (counter electrode signal #COMLn) is larger, the source signal #SLm having a smaller amplitude is supplied.
- the amplitude of the rectangular voltage signal (counter electrode signal #COMLn) is smaller when the amplitude is smaller.
- the small source signal #SLm is supplied and the amplitude of the rectangular voltage signal (counter electrode signal #COMLn) is larger, the larger source signal #SL It is preferable to supply the Lm.
- the reference amplitude for example, the above-described reference source amplitude SLST may be taken.
- the amplitude of the source signal is defined as a value obtained by subtracting the potential of the source signal at the time of negative polarity writing from the potential of the source signal at the time of positive polarity writing (the same applies hereinafter).
- the positive polarity writing refers to the case where the conduction signal is supplied and the rectangular voltage signal is at the highest voltage level, and the negative polarity writing is the time when the conduction signal is supplied. This refers to a case where the rectangular voltage signal has a low and high voltage level (the same applies hereinafter).
- FIG. 18 is a block diagram showing a configuration of the display panel 2 according to the present embodiment.
- the display panel 2 includes a counter electrode driver 24 instead of the counter electrode driver 14 in the display panel 1, and includes a display unit 26 instead of the display unit 16 in the display panel 1. Yes.
- the display unit 26 includes N gate bus lines GL1 to GLN (in the present embodiment, description is made assuming that N is an even number), and M source bus lines SL1 to SLM.
- N / 2 counter electrode bus lines COML1 to COMLN / 2 are formed.
- the counter electrode driver 24 supplies the counter electrode signals # COML1 to # COMLN / 2 to each of the N / 2 counter electrode bus lines COML1 to COMLN / 2.
- the description will be made assuming that the source driver 12 in this embodiment supplies a source signal whose polarity is inverted every two consecutive horizontal scanning periods to the source bus line SLm.
- FIG. 19A is a timing chart showing an example of waveforms of gate signals #GLn to # GLn + 3 supplied to the gate bus lines GLn to GLn + 3 by the gate driver 13 in the display panel 2, respectively.
- the number of the plurality of gate bus lines GL1 to GLN is an even number
- the number of the counter electrode bus lines is half the number of the gate bus lines. (That is, N / 2), and the pixel connected to the 2k-1th (k is a natural number) gate bus line GL2k-1 of the plurality of gate bus lines via the transistor M2k-1, m
- m is opposed to the kth counter electrode bus line COMLk among the plurality of counter electrode bus lines.
- the display panel 2 according to the present embodiment can halve the number of counter electrode bus lines compared to the display panel 1 according to the first embodiment. Therefore, the configuration of the display unit 26 in the display panel 2 can be simplified as compared with the configuration of the display unit 16 in the display panel 1. Further, the counter electrode driver 24 in the display panel 2 may supply the counter electrode signals # COML1 to # COMLN / 2 to each of the N / 2 counter electrode bus lines COML1 to COMLN / 2. The configuration can be simplified compared to the counter electrode driver 14 in the display panel 1 that supplies the counter electrode signals # COML1 to #COMLN to the counter electrode bus lines COML1 to COMLN. That is, according to the display panel 2 according to the present embodiment, the moving image blurring phenomenon can be suppressed with a simpler configuration than the display panel 1 in the first embodiment.
- FIG. 20 is a block diagram showing a configuration of the display panel 3 according to the present embodiment.
- the display panel 3 includes a control unit 31, a source driver 12, a counter electrode driver 141, a counter electrode driver 142, and a display unit 36.
- the display panel 3 includes a gate driver (not shown) and an auxiliary capacitor driver (not shown).
- the gate driver (not shown) and the auxiliary capacitor driver (not shown) have the same configurations as the gate driver 13 and the auxiliary capacitor driver 15 in the display panel 1, respectively.
- a counter electrode driver 141 and a counter electrode driver 142 are disposed on both sides of the display unit 36, respectively.
- the counter electrode driver 141 is supplied with a control signal # 11c2 from the control unit 31, and the counter electrode driver 142 is supplied with a control signal # 11c1 from the control unit 31.
- M source bus lines SL1 to SLM and N gate bus lines are formed.
- the N gate bus lines have the same configuration as the N gate bus lines GL1 to GLN in the display panel 1.
- the display unit 36 is formed with a storage capacitor bus line (not shown) similar to the storage capacitor bus line CSL in the display panel 1.
- N counter electrode bus lines COMLL1 to COMLLN are formed on the left half surface of the display section 36 substantially perpendicularly to the source bus lines SL1 to SLM.
- N counter electrode bus lines COMLR1 to COMLRRN are formed substantially perpendicular to the source bus lines SL1 to SLM.
- the N counter electrode bus lines COMLL1 to COMLLN and the N counter electrode bus lines COMLR1 to COMLRN are insulated from each other.
- the counter electrode bus line COMLLn and the counter electrode bus line COMLRn are arranged on the same straight line. Therefore, in other words, in the present embodiment, the counter electrode bus line COMLn in the display panel 1 includes two counter electrode bus lines COMLLn formed on the same straight line via the insulating portion, and the counter electrode bus line. It is composed of COMLRn.
- each of the N counter electrode bus lines COMLL1 to COMLLN is connected to the counter electrode driver 141, and one end of each of the N counter electrode bus lines COMLR1 to COMLRN is The counter electrode driver 142 is connected.
- the counter electrode driver 141 supplies the counter electrode signals # COMLL1 to #COMLLN to the counter electrode bus lines COMLL1 to COMLLN, respectively.
- the counter electrode driver 142 supplies the counter electrode to the counter electrode bus lines COMLR1 to COMLRN, respectively. Signals # COMLR1 to #COMLRN are supplied.
- FIG. 21 is a circuit diagram showing the configuration of the display unit 36 in the region R shown in FIG.
- the counter electrodes ECOMn, 1 to ECOMn, k respectively formed in the pixel regions Pn, 1 to Pn, k defined by the source bus lines SL1 to SLk are connected to the counter electrode bus line COMLLn.
- the counter electrodes ECOMn, k + 1 to ECOMn, M respectively formed in the pixel regions Pn, k + 1 to Pn, M defined by the source bus lines SLk + 1 to SLM are counter electrode bus lines.
- COMLRn is connected.
- the value of k is preferably about M / 2.
- M is the number of source bus lines.
- the value of k is preferably in the range of approximately 0.45 ⁇ M to 0.55 ⁇ M.
- the counter electrode driver 141 and the counter electrode driver 142 may be configured to perform the same operation as the counter electrode driver 14 described in the first embodiment, or may be configured to supply different counter electrode signals.
- the counter electrode driver 141 supplies the counter electrode signals # COMLL1 to #COMLLN as in the operation example 2 of the first embodiment
- the counter electrode driver 142 supplies the counter electrode signals COMLR1 to #COMLR as in the operation example 5 of the first embodiment.
- COMLRN may be supplied.
- the duty ratio of the counter electrode signals # COMLL1 to #COMLLN output from the counter electrode driver 141 may be different from the duty ratio of the counter electrode signals # COMLR1 to #COMLRN output from the counter electrode driver 142.
- the source driver 12 supplies source signals # SL1 to #SLk having a larger amplitude as shown in FIG. 15C to the source bus lines SL1 to SLk, and supplies them to the source bus lines SLk + 1 to SLM.
- the counter electrode driver 141 applies the counter signal bus lines COMLL1 to COMLLN to the FIG.
- the counter electrode signals # COMLL1 to #COMLLN having a smaller amplitude as shown in (b) of FIG. 15 are supplied, and the counter electrode driver 142 applies the counter electrode bus lines COMLR1 to COMLRN as shown in (d) of FIG. It is preferable to supply counter electrode signals # COMLR1 to #COMLRN having a larger amplitude.
- the display panel 3 includes the two counter electrode drivers (the counter electrode driver 141 and the counter electrode driver 142), and the arbitrary counter electrode bus line (counter electrode bus line COMLn).
- the counter electrode driver (counter electrode driver 141) of the counter electrode driver (counter electrode driver 141) transmits the conduction signal (gate)
- the first voltage level is different from the first voltage level in synchronization with the high level interval of the signal GLn.
- a rectangular voltage signal (counter electrode signal #COMLLn) having the second voltage level is supplied, and the other one of the two counter electrode drivers (counter electrode driver 142) performs the one scan.
- the other one of the two counter electrode bus lines (the counter electrode bus line COMLRn) is synchronized with the conduction signal in the first voltage level and the first voltage.
- a rectangular voltage signal (counter electrode signal #COMLRn) having a second voltage level different from the level is supplied.
- the rectangular voltage signals (the counter electrode signal #COMLLn and the counter electrode signal #COMLRn) can be supplied to the pixel electrodes connected to each other independently of each other.
- a pixel region including a pixel electrode connected to the one counter electrode bus line and a pixel region including a pixel electrode connected to the other counter electrode bus line are: Since it is possible to display images with different effects of improving the motion blur phenomenon, it is possible to appeal the motion blur improvement effect of the present invention to the user. That is, the effect of improving the moving image blur according to the present invention can be effectively appealed to the user.
- the source driver 12 includes the pixel electrode PEn, facing the counter electrode ECOMn, m (m ⁇ k) connected to the one counter electrode bus line (counter electrode bus line COMLLn).
- the source bus line SLm connected to m via the transistor Mn, m and the counter electrode ECOMn, r (r ⁇ k + 1) connected to the other counter electrode bus line (counter electrode bus line COMLRn)
- a source signal having a different amplitude may be supplied to the source bus line SLr connected to the pixel electrode PEn, r opposed to the pixel bus PEn, r via the transistor Mn, r.
- the pixel electrode PEn By supplying the rectangular voltage signals (counter electrode signal #COMLLn and counter electrode signal #COMLRn) independently of each other to the pixel electrode PEn, m (m ⁇ k + 1) connected to A pixel region including a pixel electrode connected to the one counter electrode bus line and a pixel electrode connected to the other counter electrode bus line, with the same image visibility except for the blur phenomenon Since the pixel region can display images having different effects of improving the phenomenon of moving image blur, the effect of improving the moving image blur according to the present invention can be displayed to the user. You can appeal the results more effectively. That is, the effect of improving the moving image blur according to the present invention can be more effectively appealed to the user.
- the length of the one counter electrode bus line (counter electrode bus line COMLLn) is approximately 45% to approximately 55% of the length of the arbitrary counter electrode bus line (counter electrode bus line COMLn in the display panel 1).
- the length of the other counter electrode bus line (counter electrode bus line COMLRn) is determined from the length of the arbitrary counter electrode bus line (counter electrode bus line COMLn in the display panel 1). It is substantially equal to the length obtained by subtracting the length of the counter electrode bus line (counter electrode bus line COMLLn).
- the luminance of the pixel region including the pixel electrodes PEn, m (n ⁇ k) disposed on one half surface of the display unit 36, and The luminance of the pixel area including the pixel electrodes PEn, m (n ⁇ k + 1) arranged on one half surface can be controlled independently in the one scanning period.
- the load characteristic of the one counter electrode bus line (counter electrode bus line COMLLn) and the load characteristic of the other counter electrode bus line (counter electrode bus line COMLRn) can be made substantially the same.
- the configuration of the counter electrode driver 141 connected to the one counter electrode bus line (counter electrode bus line COMLLn) and the counter electrode driver connected to the other counter electrode bus line (counter electrode bus line COMLRn) The configuration of 142 can be made substantially the same.
- the one counter electrode driver (counter electrode driver 141) includes first amplitude changing means (FIG. 17) that changes the amplitude of the rectangular voltage signal.
- the other one of the counter electrode drivers (counter electrode driver 142) has a second amplitude changing means (FIG. 2) for changing the amplitude of the rectangular voltage signal. 17).
- the one counter electrode driver and the other counter electrode driver can supply the rectangular voltage signals having different amplitudes.
- the one counter electrode driver and the other counter electrode driver supply the rectangular voltage signals having different amplitudes, whereby the one counter electrode driver
- the pixel region having the pixel electrode connected to the bus line and the pixel region having the pixel electrode connected to the other one of the counter electrode bus lines display images having different effects of improving the motion blur phenomenon. Therefore, the effect of improving the moving image blur according to the present invention can be appealed to the user. That is, the effect of improving the moving image blur according to the present invention can be more effectively appealed to the user.
- the source driver 12 is When supplying the source signal #SLm having an amplitude smaller than a predetermined reference amplitude, When the one counter electrode driver (counter electrode driver 141) supplies the rectangular voltage signal (counter electrode signal #COMLLn) having a smaller amplitude to the one counter electrode bus line (counter electrode bus line COMLLn).
- the source signals # SL1 to #SLk having a larger amplitude are supplied to SLk,
- the one counter electrode driver (counter electrode driver 141) supplies the rectangular voltage signal (counter electrode signal #COMLLn) having a larger amplitude to the one counter electrode bus line (counter electrode bus line COMLLn).
- the other counter electrode driver (counter electrode driver 142) applies the rectangular voltage signal (counter electrode signal #COMLRn) having a smaller amplitude to the other counter electrode bus line (counter electrode bus line COMLRn).
- the pixel electrode PEn, r facing the counter electrode ECOMn, r (r ⁇ k + 1) connected to the other counter electrode bus line is connected via the transistor Mn, r.
- the source signals # SLk + 1 to #SLM having a smaller amplitude are supplied to the source bus lines SLk + 1 to SLM,
- the other counter electrode driver (counter electrode driver 142) applies the rectangular voltage signal (counter electrode signal #COMLRn) having a larger amplitude to the other counter electrode bus line (counter electrode bus line COMLRn).
- the pixel electrode PEn, r facing the counter electrode ECOMn, r (r ⁇ k + 1) connected to the other counter electrode bus line is connected via the transistor Mn, r.
- the source signals # SLk + 1 to #SLM having a larger amplitude are supplied to the source bus lines SLk + 1 to SLM.
- the reference amplitude for example, the above-described reference source amplitude SLST may be taken.
- a pixel region including the counter electrode connected to the one counter electrode bus line and the other one counter electrode bus while maintaining the same image visibility other than the moving image blur phenomenon. Images having different effects of improving the phenomenon of moving image blur can be displayed on the pixel region including the counter electrode connected to the line. Therefore, the effect of improving the moving image blur according to the present invention can be more effectively appealed to the user.
- FIG. 22 is a circuit diagram showing a configuration of the display unit 46 in the display panel according to the present embodiment.
- Other configurations of the display panel according to the present embodiment are the same as the configuration of the display panel 1 according to the first embodiment.
- FIG. 23 is a diagram showing the polarity of the source signal applied to each pixel electrode of the display unit 46.
- source signals having opposite polarities are applied to adjacent pixels.
- the polarity of the source signal #SLm and the polarity of the source signal # SLm + 1 are opposite to each other at an arbitrary timing.
- the source signals # SL1 to #SLM may be supplied.
- the counter electrode ECOMn, m formed in the pixel region Pn, m in the display unit 46 is connected to the counter electrode bus line COMLn, and the counter electrode ECOMn formed in the pixel region Pn, m + 1. , m + 1 are connected to the counter electrode bus line COMLn-1.
- the counter electrode ECOMn + 1, m formed in the pixel region Pn + 1, m is connected to the counter electrode bus line COMLn + 1, and the counter electrode ECOMn + formed in the pixel region Pn + 1, m + 1. 1, m + 1 is connected to the counter electrode bus line COMLn.
- the counter electrode driver in the present embodiment supplies counter electrode signals # COML1 to #COMLN in which the polarity of the counter electrode signal #COMLn is opposite to the polarity of the counter electrode signal # COMLn + 1. This can be achieved, for example, by configuring the counter electrode driver in the present embodiment to have the same configuration as the counter electrode driver 14 in the first embodiment.
- the nth gate bus line GLn among the plurality of gate bus lines and the mth source bus line SLm among the plurality of source lines are connected.
- the counter electrode ECOMn, m facing the pixel electrode PEn, m connected to the transistor Mn, m is connected to the nth counter electrode bus line COMLn among the plurality of counter electrode bus lines,
- the counter electrode ECOMn, m + 1 facing the PEn, m + 1 is connected to the (n-1) th counter electrode bus line COMLn-1 among the plurality of counter electrode bus lines. Yes.
- the display panel configured as described above, by performing dot inversion driving in which the polarities of source signals applied to adjacent pixel electrodes are opposite to each other, flicker and crosstalk are suppressed. , The phenomenon of moving image blur can be suppressed.
- the display panel according to the present invention is connected to a plurality of gate bus lines, a plurality of source bus lines, a plurality of counter electrode bus lines, and an arbitrary gate bus line among the plurality of gate bus lines.
- a transistor having a gate connected to a source bus line of the plurality of source bus lines, a pixel electrode connected to a drain of the transistor, and a liquid crystal through the pixel electrode.
- a counter electrode that is opposed to the counter electrode connected to an arbitrary counter electrode bus line among the plurality of counter electrode bus lines, and is connected to one end of each of the plurality of source bus lines, and the arbitrary source bus
- a source driver for supplying a source signal to the line; and one end of each of the plurality of gate bus lines;
- a gate driver that sequentially supplies a conduction signal for conducting the transistor to the arbitrary gate bus line, wherein the gate driver transmits the conduction signal to the arbitrary gate bus line. At least a first voltage level and a second voltage level different from the first voltage level with respect to the arbitrary counter electrode bus line in one scanning period from the supply of the first conduction level to the next conduction signal.
- a counter electrode driver for supplying a rectangular voltage signal.
- a hold-type display device such as a liquid crystal display device
- an object stays at that position until a next frame is displayed after a frame is displayed. Even during a period in which the object is displayed, the moving object moves on the screen to track the object, so that a moving image blur phenomenon occurs in which the outline of the moving object is recognized as blurred.
- the display panel according to the present invention is connected to a plurality of gate bus lines, a plurality of source bus lines, a plurality of counter electrode bus lines, and an arbitrary gate bus line among the plurality of gate bus lines.
- a counter electrode that is opposed to the counter electrode connected to an arbitrary counter electrode bus line among the plurality of counter electrode bus lines, and is connected to one end of each of the plurality of source bus lines, and the arbitrary source bus
- a source driver for supplying a source signal to the line, and one end of each of the plurality of gate bus lines;
- a gate driver that sequentially supplies a conduction signal for conducting a transistor to the arbitrary gate bus line, wherein the gate driver transmits the conduction signal to the arbitrary gate bus line. Is supplied from the first voltage level and the second voltage level different from the first voltage level to the arbitrary counter electrode bus line in one scanning period from the supply of the first conduction level to the next conduction signal.
- a first voltage level and a first voltage level A second voltage level comprising capable of applying.
- the luminance of an image displayed in the pixel area changes according to the voltage applied to the pixel electrode. Therefore, according to the above configuration, the luminance of the image in the pixel region in which the pixel electrode is formed can be changed to binary in the one scanning period.
- the moving image blur can be suppressed without using a frame memory for temporarily storing the image signal. Therefore, the manufacturing cost can be reduced as compared with the conventional configuration using the frame memory for temporarily storing the image signal. In addition, there is an effect that power consumption can be reduced as compared with a conventional configuration using a frame memory for temporarily storing image signals.
- the counter electrode driver is configured to output at least the first voltage level and the at least one counter electrode bus line in synchronization with the conduction signal in the one scanning period.
- a rectangular voltage signal comprising the second voltage level is supplied.
- a rectangular voltage signal composed of the first voltage level and the second voltage level is supplied to the arbitrary counter electrode bus line in synchronization with the conduction signal. it can.
- the light / dark switching is performed after a certain time has elapsed since the video data was updated in each of all the pixel regions on the screen. It can be carried out.
- the ratio of the display period with bright luminance and the display period with dark luminance can be made almost equal at any location on the screen, it is possible to effectively suppress motion blur.
- the rectangular voltage signal has a value of one of the first voltage level and the second voltage level in a period of at least 10 percent of the one scanning period. It is preferable to take a voltage level.
- the rectangular voltage signal takes a voltage level of one of the first voltage level and the second voltage level in a period of at least 10 percent of the one scanning period. Therefore, there is a further effect that the phenomenon of moving image blur can be effectively suppressed.
- the rectangular voltage signal is the first voltage level during a period from the start of the one scanning period until approximately 10% of the one scanning period elapses.
- one voltage level of the second voltage levels is taken, and the first voltage level or the first voltage level in the period from the lapse of about 90% of the one scanning period to the end of the one scanning period It is preferable to take the other one of the second voltage levels.
- the display panel according to the present invention in the one scanning period, it is represented by a difference between the potential of the pixel electrode and the potential of the counter electrode when the rectangular voltage signal is at the first voltage level.
- To the liquid crystal expressed by the difference between the polarity of the applied voltage to the liquid crystal and the potential of the pixel electrode and the potential of the counter electrode when the rectangular voltage signal is at the second voltage level.
- the polarity of the applied voltage is preferably different from each other.
- an absolute value of a potential difference between the first voltage level and the second voltage level is not more than twice a threshold voltage of the liquid crystal.
- the orientation of the liquid crystal is not affected even when a voltage lower than the threshold voltage is applied to the liquid crystal.
- the threshold voltage is a voltage at which the alignment of the liquid crystal starts to be affected (the same applies hereinafter).
- the absolute value of the potential difference between the first voltage level and the second voltage level is not more than twice the threshold voltage of the liquid crystal, the voltage level of the rectangular voltage signal Even when the voltage level is the first voltage level or the second voltage level, the alignment of the liquid crystal can be prevented from being affected.
- the voltage level of the rectangular voltage signal is the first voltage level. Even if it is, even if it is the said 2nd voltage level, there exists the further effect that a black display can be performed.
- the counter electrode driver is configured to synchronize the first voltage level with respect to the arbitrary counter electrode bus line in the one scanning period in synchronization with the conduction signal. It is preferable to supply a rectangular voltage signal composed of a second voltage level and a third voltage level different from any of the first voltage level and the second voltage level.
- the counter electrode driver is configured to output the first voltage level and the second voltage to the arbitrary counter electrode bus line in synchronization with the conduction signal in the one scanning period. Since a rectangular voltage signal having a voltage level and a third voltage level different from any of the first voltage level and the second voltage level can be supplied, the arbitrary voltage signal can be supplied during the one scanning period.
- a ternary voltage level can be applied to the pixel electrode connected to the gate bus line via the transistor. In other words, the voltage level applied to the pixel electrode transitions twice in the one scanning period.
- the voltage applied to the liquid crystal after the first transition of the voltage level by the first transition of the voltage level in the one scanning period is suitable for display after the first transition of the voltage level. It is possible to switch between high luminance and low luminance by the second transition of the voltage level.
- the rectangular voltage signal may be generated by the first voltage level, the second voltage level, or the third voltage signal in a period of at least 10 percent of the one scanning period. It is preferable to take any one of the voltage levels.
- the rectangular voltage signal has the first voltage level, the second voltage level, or the third voltage level in a period of at least 10 percent of the one scanning period. Among them, since any one of the voltage levels is taken, there is a further effect that the moving image blur phenomenon can be effectively suppressed.
- the rectangular voltage signal is the first voltage level during a period from the start of the one scanning period until approximately 10% of the one scanning period elapses. Any one of the second voltage level and the third voltage level is taken, and after approximately 90% of the one scanning period has elapsed, the one scanning period ends. In the period, it is preferable to take another voltage level of the first voltage level, the second voltage level, or the third voltage level.
- the applied voltage to the liquid crystal represented by the difference between the potential of the pixel electrode and the potential of the counter electrode after the first transition of the voltage level in the one scanning period.
- the polarity of the voltage applied to the liquid crystal expressed by the difference between the potential of the pixel electrode and the potential of the counter electrode after the next transition of the voltage level is different from each other. Is preferred.
- the absolute value of the voltage applied to the liquid crystal is sufficiently set in the one scanning period even after the first voltage level transition or after the next voltage level transition. Can be made smaller.
- an intermediate voltage level among the first voltage level, the second voltage level, and the third voltage level, the first voltage level, Of the second voltage level and the third voltage level is preferably not more than twice the threshold voltage of the liquid crystal.
- an intermediate voltage level, the first voltage level, and the second voltage among the first voltage level, the second voltage level, and the third voltage level The absolute value of the potential difference with the lowest voltage level among the level and the third voltage level is not more than twice the threshold voltage of the liquid crystal, so that the voltage level of the rectangular voltage signal is the first voltage level.
- the black voltage display can be performed regardless of whether the voltage level of the rectangular voltage signal is any of the first voltage level, the second voltage level, and the third voltage level. Become Achieve the results.
- the counter electrode driver is configured to output the first voltage level, the second voltage level, and the second voltage level with respect to the arbitrary counter electrode bus line in the one scanning period.
- a rectangular voltage signal consisting of a first voltage level and a third voltage level different from both of the second voltage levels is supplied, and the first voltage is supplied in one scanning period following the one scanning period. Any two of the level, the second voltage level, and the third voltage level, the first voltage level, the second voltage level, and the third voltage level It is preferable to supply a rectangular voltage signal having a fourth voltage level different from any of the above.
- the counter electrode driver is configured such that the first voltage level and the second voltage are synchronized with the conduction signal with respect to the arbitrary counter electrode bus line in the one scanning period. Since a rectangular voltage signal having a level and a third voltage level different from any of the first voltage level and the second voltage level can be supplied, the pixel electrode can be supplied during the one scanning period.
- the voltage level applied to is changed to a ternary value. In other words, the voltage level applied to the pixel electrode transitions twice in the one scanning period.
- the voltage applied to the liquid crystal after the first transition of the voltage level by the first transition of the voltage level in the one scanning period is suitable for display after the first transition of the voltage level. It is possible to switch between high luminance and low luminance by the second transition of the voltage level.
- any one of the first voltage level, the second voltage level, and the third voltage level in one scanning period following the one scanning period is selected. Since a rectangular voltage signal comprising a voltage level and a fourth voltage level different from any of the first voltage level, the second voltage level, and the third voltage level can be supplied. Compared to a case where a rectangular voltage signal composed of the first voltage level, the second voltage level, and the third voltage level is supplied in one scanning period following the one scanning period. In addition, the brightness levels of high brightness and low brightness can be adjusted more flexibly.
- the absolute value of the potential difference of the voltage level before and after the first transition of the voltage level in the one scanning period is the time before and after the transition of the next voltage level in the one scanning period. Is preferably smaller than the absolute value of the potential difference of the voltage level.
- the absolute value of the potential difference of the voltage level before and after the first voltage level transition in the one scanning period is the voltage level before and after the next voltage level transition in the one scanning period. Therefore, the luminance difference before and after the next voltage level transition can be made larger than the luminance difference before and after the first voltage level transition. Therefore, according to said structure, there exists the further effect that the phenomenon of the said moving image blur can be suppressed more effectively.
- the rectangular voltage signal is generated by the first voltage level, the second voltage level, and the third voltage in a period of at least 10 percent of the one scanning period. It is preferable to take any one of the level or the fourth voltage level.
- the rectangular voltage signal is output from the first voltage level, the second voltage level, the third voltage level, or at least 10% of the one scanning period, or Since any one of the fourth voltage levels is taken, there is a further effect that the phenomenon of moving image blur can be effectively suppressed.
- the rectangular voltage signal is the first voltage level during a period from the start of the one scanning period until approximately 10% of the one scanning period elapses. Any one of the second voltage level, the third voltage level, and the fourth voltage level is taken, and after a period of approximately 90% of the one scanning period has elapsed, In the period until the end of one scanning period, another voltage level of the first voltage level, the second voltage level, the third voltage level, or the fourth voltage level is taken. Is preferable.
- the applied voltage to the liquid crystal represented by the difference between the potential of the pixel electrode and the potential of the counter electrode after the first transition of the voltage level in the one scanning period.
- the polarity of the voltage applied to the liquid crystal expressed by the difference between the potential of the pixel electrode and the potential of the counter electrode after the next transition of the voltage level is different from each other. Is preferred.
- the absolute value of the voltage applied to the liquid crystal is sufficiently set in the one scanning period even after the first voltage level transition or after the next voltage level transition. Can be made smaller.
- the second highest voltage level among the first voltage level, the second voltage level, the third voltage level, and the fourth voltage level is The absolute value of the potential difference from the lowest voltage level among the first voltage level, the second voltage level, the third voltage level, and the fourth voltage level is the threshold voltage of the liquid crystal. It is preferable that it is 2 times or less.
- the second highest voltage level among the first voltage level, the second voltage level, the third voltage level, and the fourth voltage level, and the first voltage level The absolute value of the potential difference from the lowest voltage level among the second voltage level, the second voltage level, the third voltage level, and the fourth voltage level is less than twice the threshold voltage of the liquid crystal. Therefore, the voltage level of the rectangular voltage signal is the lowest voltage level among the first voltage level, the second voltage level, the third voltage level, and the fourth voltage level. Even if it is the highest voltage level among the first voltage level, the second voltage level, the third voltage level, and the fourth voltage level, the alignment of the liquid crystal is Be unaffected Door can be.
- the voltage level of the rectangular voltage signal is the first voltage.
- black display can be performed at any of the level, the second voltage level, the third voltage level, and the fourth voltage level.
- the gate driver when the gate driver supplies the conduction signal to the arbitrary gate bus line, the highest voltage level among the voltage levels to the arbitrary counter electrode bus line.
- the counter electrode driver supplies the rectangular voltage signal whose voltage level is in descending order to the arbitrary counter electrode bus line in the one scanning period. It is preferable to do.
- the rise from low luminance to high luminance is not possible due to the fact that the response of the liquid crystal has a finite time.
- a sufficient phenomenon occurs.
- the time required for the change from low luminance to high luminance is longer than the time required for the change from high luminance to low luminance.
- the above phenomenon can occur at the timing when the potential difference between the potential of the pixel electrode and the potential of the counter electrode increases.
- the gate driver when the gate driver supplies the conduction signal to the arbitrary gate bus line, the highest voltage level among the voltage levels is applied to the arbitrary counter electrode bus line.
- a voltage signal having a higher voltage level can be supplied to the pixel electrode in the one scanning period, and a voltage signal having a lower voltage level can be subsequently supplied.
- the potential difference between the potential of the pixel electrode and the potential of the counter electrode can be increased stepwise. As a result, it is possible to suppress the phenomenon that the rise from the low luminance to the high luminance, which may occur in the normally black method, is insufficient.
- the gate driver when the gate driver supplies the conduction signal to the arbitrary gate bus line, the highest voltage level among the voltage levels to the arbitrary counter electrode bus line.
- the counter electrode driver supplies the rectangular voltage signal whose voltage level is in ascending order during the one scanning period to the arbitrary counter electrode bus line. It is preferable to do.
- the rise from low luminance to high luminance is not possible due to the fact that the response of the liquid crystal has a finite time.
- a sufficient phenomenon occurs.
- the time required for the change from low luminance to high luminance is longer than the time required for the change from high luminance to low luminance.
- the above phenomenon can occur at the timing when the potential difference between the potential of the pixel electrode and the potential of the counter electrode increases.
- the gate driver when the gate driver supplies the conduction signal to the arbitrary gate bus line, the lowest voltage level among the voltage levels is set to the arbitrary counter electrode bus line.
- a voltage signal having a lower voltage level can be supplied to the pixel electrode in the one scanning period, and a voltage signal having a higher voltage level can be subsequently supplied.
- the potential difference between the potential of the pixel electrode and the potential of the counter electrode can be increased stepwise. As a result, it is possible to suppress the phenomenon that the rise from the low luminance to the high luminance, which may occur in the normally black method, is insufficient.
- the counter electrode driver includes the counter electrode facing the pixel electrode connected to the nth gate bus line of the plurality of gate bus lines via the transistor.
- the rectangular voltage signal is supplied to the line synchronously.
- the counter electrode bus line in which the counter electrode facing the pixel electrode connected to the nth gate bus line of the plurality of gate bus lines via the transistor is connected;
- the rectangular electrode bus line connected to the counter electrode bus line connected to the pixel electrode connected to the n + 1-th gate bus line of the plurality of gate bus lines via the transistor Since the voltage signals can be supplied synchronously, the counter electrode driver having a simpler configuration can further suppress the phenomenon of the moving image blur.
- the counter electrode driver includes the counter electrode facing the pixel electrode connected to the nth gate bus line of the plurality of gate bus lines via the transistor.
- Line On the other hand, it is preferable to supply the rectangular voltage signal in synchronization.
- the counter electrode bus line in which the counter electrode facing the pixel electrode connected to the nth gate bus line of the plurality of gate bus lines via the transistor is connected;
- the rectangular electrode bus line is connected to the counter electrode bus line connected to the pixel electrode connected to the n + 2th gate bus line of the plurality of gate bus lines via the transistor. Since the voltage signals can be supplied synchronously, the counter-electrode driver having a simpler configuration can suppress the occurrence of the moving image blur while suppressing the generation of streaks according to flicker and polarity inversion. There is a further effect.
- the number of the plurality of gate bus lines is an even number
- the number of the plurality of counter electrode bus lines is half the number of the gate bus lines
- the plurality of gate bus lines The counter electrode facing the pixel electrode connected to the 2k-1st (k is a natural number) gate bus line of the bus lines via the transistor, and the 2k-th gate bus of the plurality of gate bus lines.
- the counter electrode facing the pixel electrode connected to the line via the transistor is preferably connected to the kth counter electrode bus line among the plurality of counter electrode bus lines.
- the number of the counter electrode bus lines formed in the display panel can be reduced to half of the number of the plurality of gate bus lines. There is a further effect that the phenomenon of motion blur can be suppressed.
- the counter electrode driver includes an amplitude changing unit that changes the amplitude of the rectangular voltage signal.
- the counter electrode driver since the counter electrode driver includes the amplitude changing unit that changes the amplitude of the rectangular voltage signal, the phenomenon of moving image blur can be more effectively suppressed. There is a further effect.
- the source driver when the source driver supplies the source signal having an amplitude less than a predetermined reference amplitude, when the amplitude of the rectangular voltage signal is smaller, When the source signal having a larger amplitude is supplied, and when the amplitude of the rectangular voltage signal is larger, the source signal having a smaller amplitude is supplied, and the source signal having an amplitude equal to or larger than a predetermined reference amplitude is supplied.
- the source signal having a smaller amplitude when the amplitude of the rectangular voltage signal is smaller, the source signal having a smaller amplitude is supplied, and when the amplitude of the rectangular voltage signal is larger, the larger amplitude of the source signal is supplied. It is preferable to supply a source signal.
- the source driver when the source driver supplies the source signal having an amplitude smaller than a predetermined reference amplitude, when the amplitude of the rectangular voltage signal is smaller, the source driver has a larger amplitude.
- the source signal when the source signal is supplied, and when the amplitude of the rectangular voltage signal is larger, the source signal having a smaller amplitude is supplied, and the source signal having an amplitude larger than a predetermined reference amplitude is supplied.
- the amplitude of the source signal is defined as a value obtained by subtracting the potential of the source signal at the time of negative polarity writing from the potential of the source signal at the time of positive polarity writing (the same applies hereinafter).
- the positive polarity writing refers to the case where the conduction signal is supplied and the rectangular voltage signal is at the highest voltage level, and the negative polarity writing is the time when the conduction signal is supplied. This refers to a case where the rectangular voltage signal has a low and high voltage level (the same applies hereinafter).
- the display panel according to the present invention includes the two counter electrode drivers, and the arbitrary counter electrode bus line includes two counter electrode bus lines formed on the same straight line via an insulating portion.
- One counter electrode driver of the two counter electrode drivers is synchronized with the conduction signal with respect to one counter electrode bus line of the two counter electrode bus lines in the one scanning period.
- a rectangular voltage signal having a first voltage level and a second voltage level different from the first voltage level is supplied, and the other counter electrode driver of the two counter electrode drivers is In the scanning period, with respect to the other counter electrode bus line of the two counter electrode bus lines, the first voltage level and the first voltage are synchronized with the conduction signal.
- a rectangular voltage signal consisting of pressure level different from the second voltage level may be supplied.
- the one of the counter electrode bus lines out of the two counter electrode bus lines formed on the same straight line with the insulating portion interposed therebetween is formed into the rectangular shape by the one counter electrode driver.
- a voltage signal is supplied, and the rectangular voltage signal is supplied to the other counter electrode bus line by the other counter electrode driver.
- the pixel electrode connected to the one counter electrode bus line and the pixel electrode connected to the other counter electrode bus line are independent of each other from the rectangular shape.
- a voltage signal can be supplied. Therefore, therefore, according to the above configuration, a pixel region including a pixel electrode connected to the one counter electrode bus line and a pixel region including a pixel electrode connected to the other counter electrode bus line are: Since it is possible to display images with different effects of improving the motion blur phenomenon, it is possible to appeal the motion blur improvement effect of the present invention to the user. That is, there is a further effect that the effect of improving the moving image blur according to the present invention can be effectively appealed to the user.
- the source driver includes the source bus line connected to the pixel electrode facing the counter electrode connected to the one counter electrode bus line via the transistor.
- Source signals having different amplitudes are supplied to the source bus line connected via the transistor to the pixel electrode facing the counter electrode connected to the other counter electrode bus line. Is preferable.
- the source driver includes the source bus line connected to the pixel electrode facing the counter electrode connected to the one counter electrode bus line via the transistor, and the other driver.
- Source signals having different amplitudes can be supplied to the source bus line connected to the pixel electrode opposite to the counter electrode connected to one counter electrode bus line via the transistor.
- a pixel region including a pixel electrode connected to the other one of the counter electrode bus lines can display images with different effects of improving the above-mentioned moving image blur phenomenon.
- the effect of improving the moving image blur according to the invention can be more effectively promoted. That is, there is a further effect that the effect of improving the moving image blur according to the present invention can be more effectively appealed to the user.
- the length of the one counter electrode bus line is about 45% to about 55% of the length of the arbitrary counter electrode bus line.
- the length of one counter electrode bus line is preferably substantially equal to a length obtained by subtracting the length of the one counter electrode bus line from the length of the arbitrary counter electrode bus line.
- the arbitrary counter electrode bus line is arranged within the range of ⁇ 5% from the center line that bisects the display unit for displaying an image on the display panel in parallel with the source bus line.
- the counter electrode bus line is electrically separated from the other counter electrode bus line.
- the luminance of the pixel region including the pixel electrode disposed on one half surface of the display unit and the luminance of the pixel region including the pixel electrode disposed on the other half surface are In one scanning period, each can be controlled independently. Further, since the load characteristic of the one counter electrode bus line and the load characteristic of the other counter electrode bus line can be made substantially the same, the counter electrode connected to the one counter electrode bus line The configuration of the driver and the configuration of the counter electrode driver connected to the other counter electrode bus line can be made substantially the same.
- the one counter electrode driver includes first amplitude changing means for changing the amplitude of the rectangular voltage signal, and the other counter electrode driver.
- the electrode driver preferably includes second amplitude changing means for changing the amplitude of the rectangular voltage signal.
- the one counter electrode driver includes the first amplitude changing unit that changes the amplitude of the rectangular voltage signal, and the other counter electrode driver Since the second amplitude changing means for changing the amplitude of the rectangular voltage signal is provided, the one counter electrode driver and the other counter electrode driver have different amplitudes.
- the rectangular voltage signal can be supplied.
- the one counter electrode driver and the other counter electrode driver supply the rectangular voltage signals having different amplitudes, whereby the one counter electrode driver
- the pixel region having the pixel electrode connected to the bus line and the pixel region having the pixel electrode connected to the other one of the counter electrode bus lines display images having different effects of improving the motion blur phenomenon. Therefore, the effect of improving the moving image blur according to the present invention can be appealed to the user. That is, there is a further effect that the effect of improving the moving image blur according to the present invention can be more effectively appealed to the user.
- the source driver is When supplying the source signal with an amplitude less than a predetermined reference source amplitude,
- the pixel facing the counter electrode connected to the one counter electrode bus line when the one counter electrode driver supplies the rectangular voltage signal having a smaller amplitude to the one counter electrode bus line Supplying the source signal having a larger amplitude to the source bus line connected to the electrode through the transistor;
- the pixel facing the counter electrode connected to the one counter electrode bus line when the one counter electrode driver supplies the rectangular voltage signal having a larger amplitude to the one counter electrode bus line Supplying the source signal having a smaller amplitude to the source bus line connected to the electrode via the transistor;
- the counter connected to the other counter electrode bus line when the other counter electrode driver supplies the rectangular voltage signal having a smaller amplitude to the other counter electrode bus line.
- the counter connected to the other counter electrode bus line Supplying the source signal having a larger amplitude to the source bus line connected to the pixel electrode facing the electrode via the transistor;
- the counter connected to the other counter electrode bus line Supplying the source signal having a smaller amplitude to the source bus line connected to the pixel electrode facing the electrode via the transistor;
- the source signal having an amplitude greater than or equal to a predetermined reference source amplitude The pixel facing the counter electrode connected to the one counter electrode bus line when the one counter electrode driver supplies the rectangular voltage signal having a smaller amplitude to the one counter electrode bus line Supplying the source signal having a smaller amplitude to the source bus line connected to the electrode via the transistor;
- the pixel facing the counter electrode connected to the one counter electrode bus line when the one counter electrode driver supplies the rectangular voltage signal having a larger amplitude to the one counter electrode bus line Supplying the source signal having a larger amplitude to the source bus line connected to the electrode through the transistor;
- the source signal having a smaller amplitude is supplied to the source bus line connected to the pixel electrode facing the electrode via the transistor.
- a pixel region including the counter electrode connected to the one counter electrode bus line and the other one counter electrode bus while maintaining the same image visibility other than the moving image blur phenomenon. Images having different effects of improving the phenomenon of moving image blur can be displayed on the pixel region including the counter electrode connected to the line. Therefore, it is possible to more effectively appeal to the user the effect of improving the moving image blur according to the present invention.
- the nth gate bus line of the plurality of gate bus lines and the mth source bus line of the plurality of source lines are connected to the transistor.
- the counter electrode facing the pixel electrode is connected to an nth counter electrode bus line of the plurality of counter electrode bus lines, and the nth gate bus line of the plurality of gate bus lines;
- the counter electrode facing the pixel electrode connected to the transistor connected to the m + 1st source bus line among the plurality of source lines is the n ⁇ 1th counter electrode of the plurality of counter electrode bus lines. It is preferable that it is connected to the electrode bus line.
- liquid crystal display device including the display panel configured as described above is also included in the scope of the present invention.
- the driving method includes a plurality of gate bus lines, a plurality of source bus lines, a plurality of counter electrode bus lines, and a gate connected to an arbitrary gate bus line among the plurality of gate bus lines.
- a transistor connected to an arbitrary source bus line of the plurality of source bus lines, a pixel electrode connected to the drain of the transistor, and a counter electrode facing the pixel electrode via liquid crystal
- An electrode connected to an arbitrary counter electrode bus line of the plurality of counter electrode bus lines, and connected to one end of each of the plurality of source bus lines, to the arbitrary source bus line
- a gate driver for sequentially supplying a conduction signal to be conducted to the arbitrary gate bus line, and a driving method for driving a display panel, wherein the gate driver is connected to the arbitrary gate bus line.
- the first voltage level and the first voltage are synchronized with the conduction signal with respect to the arbitrary counter electrode bus line.
- a voltage signal supplying step for supplying a rectangular voltage signal having a second voltage level different from the voltage level of the first voltage level.
- the present invention includes a liquid crystal display device including the display panel in each of the above-described embodiments.
- the present invention can be suitably applied to a display panel that displays an image using liquid crystal.
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Abstract
Description
本発明の第1の実施形態に係る表示パネルの構成について、図1および図2を参照して説明する。図1は、本実施形態に係る表示パネル1の構成を示すブロック図である。表示パネル1は、アクティブマトリックス型の液晶表示パネルである。
以下では、図3の(a)~(d)を参照して、本実施形態に係る表示パネル1の動作の第1の例について説明する。
V3=(VCOM1-VCOM2)×CLC/ΣC+V2
によって定まる。上述のように、VCOM1<VCOM2であるので、電位V3は、電位V2よりも小さい。
V3-VCOM1-(V2-VCOM2)=(VCOM2-VCOM1)×(ΣC-CLC)/ΣC
を満たし、上記のように、VCOM1<VCOM2であるので、V3-VCOM1>V2-VCOM2が成り立つ。すなわち、時刻t3から時刻t4までの期間における画素電極PEn,mの電位VPEn,mと対向電極ECOMn,mの電位VECOMn,mとの電位差は、時刻t2から時刻t3までの期間における画素電極PEn,mの電位VPEn,mと対向電極ECOMn,mの電位VECOMn,mとの電位差よりも大きい。したがって、時刻t3から時刻t4までの期間における画素領域Pn,mの輝度は、時刻t2から時刻t3までの期間における画素領域Pn,mの輝度よりも大きい。
V1=(VCOM2-VCOM1)×CLC/ΣC+V4
によって定まる。また、上述のように、VCCOM1<VCCM2であるので、電位V1は、電位V4よりも大きい。
VCOM2-V1-(VCOM1-V4)=(VCOM2-VCOM1)×(ΣC-CLC)/ΣC
を満たし、上記のように、VCOM1<VCOM2であるので、VCOM2-V1>(VCOM1-V4)が成り立つ。すなわち、時刻t6から時刻t7までの期間における画素電極PEn,mの電位VPEn,mと対向電極ECOMn,mの電位VECOMn,mとの電位差は、時刻t5から時刻t6までの期間における画素電極PEn,mの電位VPEn,mと対向電極ECOMn,mの電位VECOMn,mとの電位差よりも大きい。したがって、時刻t6から時刻t7までの期間における画素領域Pn,mの輝度は、時刻t5から時刻t6までの期間における画素領域Pn,mの輝度よりも大きい。
ΔVLC=(VCOM2-VCOM1)×(ΣC-CLC)/ΣC
を満たす。ここで、(ΣC-CLC)/ΣC<1であるので、ΔVLC<(VCOM2-VCOM1)が導かれる。
VLC=-ΔVLC/2
となるように設定し、対向電極信号#COMLnの電位が電位VCOM2である場合に、
VLC=ΔVLC/2
と設定することが望ましい。ここで、ΔVLC/2が前記閾値電圧VLCth以下、すなわち、
ΔVLC/2≦VLCth
であれば、対向電極信号#COMLnの電位が電位VCOM1であっても、電位VCOM2であっても、黒表示を行うことができる。しがたがって、
VCOM2-VCOM1≦2×VLCth
であれば、対向電極信号#COMLnの電位が電位VCOM1であっても、電位VCOM2であっても、黒表示を行うことができる。
以下では、図4の(a)~(d)を参照して、本実施形態に係る表示パネル1の動作の第2の例について説明する。
このとき、ゲート信号#GLnはローレベルであるので、トランジスタMn,mは、遮断状態である。したがって、画素電極PEn,mに蓄積された電荷と第1の補助容量電極CE1n,mに蓄積された電荷との和は不変である。一方で、対向電極信号#COMLnの値が変化すると、画素電極PEn,mおよび第1の補助容量電極CE1n,mの各々に蓄積されたそれぞれの電荷は、変化する。それに伴い、画素電極PEn,mの電位VPEn,mは、電位V2’から電位V3’へと変化する。ここで、電位V3’の具体的な値は、
V3’=(VCOM2’-VCOM3’)×CLC/ΣC+V2’
によって定まる。なお、上述のように、VCOM2’<VCOM3’であるので、電位V3’は、電位V2’よりも小さい。
V4’=(VCOM1’-VCOM2’)×CLC/ΣC+V3’
によって定まる。なお、上述のように、VCOM1’<VCOM2’であるので、電位V4’は、電位V3’よりも小さい。
V4’-VCOM1’-(V3’-VCOM2’)=(VCOM2’-VCOM1’)×(ΣC-CLC)/ΣC
を満たし、上記のように、VCOM1’<VCOM2’であるので、V4’-VCOM1’>V3’-VCOM2’が成り立つ。すなわち、時刻t3’から時刻t4’までの期間における画素電極PEn,mの電位VPEn,mと対向電極ECOMn,mの電位VECOMn,mとの電位差は、時刻t2’から時刻t3’までの期間における画素電極PEn,mの電位VPEn,mと対向電極ECOMn,mの電位VECOMn,mとの電位差よりも大きい。したがって、時刻t3’から時刻t4’までの期間における画素領域Pn,mの輝度は、時刻t2’から時刻t3’までの期間における画素領域Pn,mの輝度よりも大きい。
V6’=(VCOM2’-VCOM1’)×CLC/ΣC+V5’
によって定まる。なお、上述のように、VCOM1’<VCOM2’であるので、電位V6’は、電位V5’よりも大きい。
V1’=(VCOM3’-VCOM2’)×CLC/ΣC+V6’
によって定まる。なお、上述のように、VCOM2’<VCOM3’であるので、電位V1’は、電位V6’よりも大きい。
VCOM3’-V1’-(VCOM2’-V6’)=(VCOM3’-VCOM2’)×(ΣC-CLC)/ΣC
を満たし、上記のように、VCOM2’<VCOM3’であるので、VCOM3’-V1’>VCOM2’-V6’が成り立つ。すなわち、時刻t6’から時刻t7’までの期間における画素電極PEn,mの電位VPEn,mと対向電極ECOMn,mの電位VECOMn,mとの電位差は、時刻t5’から時刻t6’までの期間における画素電極PEn,mの電位VPEn,mと対向電極ECOMn,mの電位VECOMn,mとの電位差よりも大きい。したがって、時刻t6’から時刻t7’までの期間における画素領域Pn,mの輝度は、時刻t5’から時刻t6’までの期間における画素領域Pn,mの輝度よりも大きい。
以下では、図5の(a)~(d)を参照して、本実施形態に係る表示パネル1の動作の第3の例について説明する。
V3’’=(VCOM3’’-VCOM4’’)×CLC/ΣC+V2’’
によって定まる。なお、上述のように、VCOM3’’<VCOM4’’であるので、電位V3’’は、電位V2’’よりも小さい。
V4’’=(VCOM1’’-VCOM3’’)×CLC/ΣC+V3’’
によって定まる。なお、上述のように、VCOM1’’<VCOM3’’であるので、電位V4’’は、電位V3’’よりも小さい。
V4’’-VCOM1’’-(V3’’-VCOM3’’)=(VCOM3’’-VCOM1’’)×(ΣC-CLC)/ΣC
を満たし、上記のように、VCOM1’’<VCOM3’’であるので、V4’’-VCOM1’’>V3’’-VCOM3’’が成り立つ。すなわち、時刻t3’’から時刻t4’’までの期間における画素電極PEn,mの電位VPEn,mと対向電極ECOMn,mの電位VECOMn,mとの電位差は、時刻t2’’から時刻t3’’までの期間における画素電極PEn,mの電位VPEn,mと対向電極ECOMn,mの電位VECOMn,mとの電位差よりも大きい。したがって、時刻t3’’から時刻t4’’までの期間における画素領域Pn,mの輝度は、時刻t2’’から時刻t3’’までの期間における画素領域Pn,mの輝度よりも大きい。
V6’’=(VCOM2’’-VCOM1’’)×CLC/ΣC+V5’’
によって定まる。なお、上述のように、VCOM1’’<VCOM2’’であるので、電位V6’’は、電位V5’’よりも大きい。
V1’’=(VCOM4’’-VCOM2’’)×CLC/ΣC+V6’’
によって定まる。なお、上述のように、VCOM2’’<VCOM4’’であるので、電位V1’’は、電位V6’’よりも大きい。
VCOM4’’-V1’’-(VCOM2’’-V6’’)=(VCOM4’’-VCOM2’’)×(ΣC-CLC)/ΣC
を満たし、上記のように、VCOM2’’<VCOM4’’であるので、VCOM4’’-V1’’>VCOM2’’-V6’’が成り立つ。すなわち、時刻t6’’から時刻t7’’までの期間における画素電極PEn,mの電位VPEn,mと対向電極ECOMn,mの電位VECOMn,mとの電位差は、時刻t5’’から時刻t6’’までの期間における画素電極PEn,mの電位VPEn,mと対向電極ECOMn,mの電位VECOMn,mとの電位差よりも大きい。したがって、時刻t6’’から時刻t7’’までの期間における画素領域Pn,mの輝度は、時刻t5’’から時刻t6’’までの期間における画素領域Pn,mの輝度よりも大きい。
以下では、図6の(a)~(d)を参照して、本実施形態に係る表示パネル1の動作の第4の例について説明する。
V13=(VCOM11-VCOM12)×CLC/ΣC+V12
によって定まる。なお、上述のように、VCOM11<VCOM12であるので、電位V13は、電位V12よりも小さい。
V12-VCOM12-(V13-VCOM11)=(VCOM11-VCOM12)×(ΣC-CLC)/ΣC
を満たし、上記のように、VCOM11<VCOM12であるので、V12-VCOM12<V13-VCOM11が成り立つ。すなわち、時刻t13から時刻t14までの期間における画素電極PEn,mの電位VPEn,mと対向電極ECOMn,mの電位VECOMn,mとの電位差は、時刻t12から時刻t13までの期間における画素電極PEn,mの電位VPEn,mと対向電極ECOMn,mの電位VECOMn,mとの電位差よりも小さい。したがって、時刻t13から時刻t14までの期間における画素領域Pn,mの輝度は、時刻t12から時刻t13までの期間における画素領域Pn,mの輝度よりも小さい。
V14=(VCOM12-VCOM11)×CLC/ΣC+V11
によって定まる。なお、上述のように、VCOM11<VCOM12であるので、電位V14は、電位V11よりも大きい。
VCOM11-V11-(VCOM12-V14)=(VCOM11-VCOM12)×CCS/ΣC
を満たし、上記のように、VCOM11<VCOM12であるので、VCOM11-V11<VCOM12-V14が成り立つ。すなわち、時刻t16から時刻t17までの期間における画素電極PEn,mの電位VPEn,mと対向電極ECOMn,mの電位VECOMn,mとの電位差は、時刻t15から時刻t16までの期間における画素電極PEn,mの電位VPEn,mと対向電極ECOMn,mの電位VECOMn,mとの電位差よりも小さい。したがって、時刻t16から時刻t17までの期間における画素領域Pn,mの輝度は、時刻t15から時刻t16までの期間における画素領域Pn,mの輝度よりも小さい。
以下では、図7の(a)~(d)を参照して、本実施形態に係る表示パネル1の動作の第5の例について説明する。
V13’=(VCOM11’-VCOM13’)×CLC/ΣC+V12’
によって定まる。なお、上述のように、VCOM11’<VCOM13’であるので、電位V13’は、電位V12’よりも小さい。
V14’=(VCOM12’-VCOM11’)×CLC/ΣC+V13’
によって定まる。なお、上述のように、VCOM11’<VCOM12’であるので、電位V14’は、電位V13’よりも大きい。
V14’-VCOM12’-(V13’-VCOM11’)=(VCOM11’-VCOM12’)×(ΣC-CLC)/ΣC
を満たし、上記のように、VCOM11’<VCOM12’であるので、V14’-VCOM12’<V13’-VCOM11’が成り立つ。すなわち、時刻t13’から時刻t14’までの期間における画素電極PEn,mの電位VPEn,mと対向電極ECOMn,mの電位VECOMn,mとの電位差は、時刻t12’から時刻t13’までの期間における画素電極PEn,mの電位VPEn,mと対向電極ECOMn,mの電位VECOMn,mとの電位差よりも小さい。したがって、時刻t13’から時刻t14’までの期間における画素領域Pn,mの輝度は、時刻t12’から時刻t13’までの期間における画素領域Pn,mの輝度よりも小さい。
V16’=(VCOM13’-VCOM11’)×CLC/ΣC+V15’
によって定まる。なお、上述のように、VCOM11’<VCOM13’であるので、電位V16’は、電位V15’よりも大きい。
V11’=(VCOM12’-VCOM13’)×CLC/ΣC+V16’
によって定まる。なお、上述のように、VCOM12’<VCOM13’であるので、電位V11’は、電位V16’よりも小さい。
VCOM12’-V11’-(VCOM13’-V16’)=(VCOM12’-VCOM13’)×(ΣC-CLC)/ΣC
を満たし、上記のように、VCOM12’<VCOM13’であるので、VCOM12’-V11’<VCOM13’-V16’が成り立つ。すなわち、時刻t16’から時刻t17’までの期間における画素電極PEn,mの電位VPEn,mと対向電極ECOMn,mの電位VECOMn,mとの電位差は、時刻t15’から時刻t16’までの期間における画素電極PEn,mの電位VPEn,mと対向電極ECOMn,mの電位VECOMn,mとの電位差よりも小さい。したがって、時刻t16’から時刻t17’までの期間における画素領域Pn,mの輝度は、時刻t15’から時刻t16’までの期間における画素領域Pn,mの輝度よりも小さい。
以下では、図8の(a)~(d)を参照して、本実施形態に係る表示パネル1の動作の第6の例について説明する。
V13’’=(VCOM11’’-VCOM14’’)×CLC/ΣC+V12’’
によって定まる。なお、上述のように、VCOM11’’<VCOM14’’であるので、電位V13’’は、電位V12’’よりも小さい。
V14’’=(VCOM13’’-VCOM11’’)×CLC/ΣC+V13’’
によって定まる。なお、上述のように、VCOM11’’<VCOM13’’であるので、電位V14’’は、電位V13’’よりも大きい。
VCOM13’’-V14’’-(VCOM11’’-V13’’)=(VCOM13’’-VCOM11’’)×(ΣC-CLC)/ΣC
を満たし、上記のように、VCOM11’’<VCOM13’’であるので、VCOM13’’-V14’’>VCOM11’’-V13’’が成り立つ。すなわち、時刻t13’’から時刻t14’’までの期間における画素電極PEn,mの電位VPEn,mと対向電極ECOMn,mの電位VECOMn,mとの電位差は、時刻t12’’から時刻t13’’までの期間における画素電極PEn,mの電位VPEn,mと対向電極ECOMn,mの電位VECOMn,mとの電位差よりも大きい。したがって、時刻t13’’から時刻t14’’までの期間における画素領域Pn,mの輝度は、時刻t12’’から時刻t13’’までの期間における画素領域Pn,mの輝度よりも大きい。
V11’’=(VCOM14’’-VCOM11’’)×CLC/ΣC+V15’’
によって定まる。なお、上述のように、VCOM11’’<VCOM14’’であるので、電位V11’’は、電位V15’’よりも大きい。
V14’’=(VCOM12’’-VCOM14’’)×CLC/ΣC+V11’’
によって定まる。なお、上述のように、VCCOM12’’<VCOM14’’であるので、電位V14’’は、電位V11’’よりも小さい。
V14’’-VCOM12’’-(V11’’-VCOM14’’)=(VCOM14’’-VCOM12’’)×(ΣC-CLC)/ΣC
を満たし、上記のように、VCOM12’’<VCOM14’’であるので、V14’’-VCOM12’’>V11’’-VCOM14’’が成り立つ。すなわち、時刻t17’’から時刻t18’’までの期間における画素電極PEn,mの電位VPEn,mと対向電極ECOMn,mの電位VECOMn,mとの電位差は、時刻t16’’から時刻t17’’までの期間における画素電極PEn,mの電位VPEn,mと対向電極ECOMn,mの電位VECOMn,mとの電位差よりも大きい。したがって、時刻t17’’から時刻t18’’までの期間における画素領域Pn,mの輝度は、時刻t16’’から時刻t17’’までの期間における画素領域Pn,mの輝度よりも大きい。
上述した動作例1~6においては、対向電極ドライバ14が、複数の対向電極バスラインCOML1~COMLNのそれぞれに対し、水平走査期間Th毎に対向電極信号#COML1~#COMLNを順次供給する場合、すなわち、対向電極信号#COMLnと対向電極信号#COMLn+1との間に、水平走査期間Thの長さに対応する位相差が存在する場合を例に挙げ説明を行ったが、本発明はこれに限られるものではない。
V23=(VCOM22-VCOM23)×CLC/ΣC+V22
によって定まる。なお、上述のように、VCOM22<VCOM23であるので、電位V23は、電位V22よりも小さい。
V24=(VCOM21-VCOM22)×CLC/ΣC+V23
によって定まる。なお、上述のように、VCOM21<VCOM22であるので、電位V24は、電位V23よりも小さい。
VCOM21-V24-(VCOM22-V23)=(VCOM21-VCOM22)×(ΣC-CLC)/ΣC
を満たし、上記のように、VCOM21<VCOM22であるので、VCOM21-V24<VCOM22-V23が成り立つ。すなわち、時刻t23から時刻t24までの期間における画素電極PEn,mの電位VPEn,mと対向電極ECOMn,mの電位VECOMn,mとの電位差は、時刻t22から時刻t23までの期間における画素電極PEn,mの電位VPEn,mと対向電極ECOMn,mの電位VECOMn,mとの電位差よりも小さい。したがって、時刻t23から時刻t24までの期間における画素領域Pn,mの輝度は、時刻t22から時刻t23までの期間における画素領域Pn,mの輝度よりも小さい。
実施形態1においては、表示パネル1が、N本のゲートバスラインGL1~GLN、および、N本の対向電極バスラインCOML1~COMLNを備える構成について説明を行ったが、本発明はこれに限られるものではない。
以下では、図20および図21を参照して、本発明の第3の実施形態に係る表示パネル3について説明する。
前記ソースドライバ12は、
予め定められた基準振幅未満の振幅の前記ソース信号#SLmを供給する場合には、
前記一方の対向電極ドライバ(対向電極ドライバ141)が前記一方の対向電極バスライン(対向電極バスラインCOMLLn)に振幅のより小さい前記矩形状の電圧信号(対向電極信号#COMLLn)を供給する場合に、前記一方の対向電極バスラインに接続された前記対向電極ECOMn,m(m≦k)に対向する前記画素電極PEn,mに前記トランジスタMn,mを介して接続された前記ソースバスラインSL1~SLkに対して、振幅のより大きい前記ソース信号#SL1~#SLkを供給し、
前記一方の対向電極ドライバ(対向電極ドライバ141)が前記一方の対向電極バスライン(対向電極バスラインCOMLLn)に振幅のより大きい前記矩形状の電圧信号(対向電極信号#COMLLn)を供給する場合に、前記一方の対向電極バスラインに接続された前記対向電極ECOMn,m(m≦k)に対向する前記画素電極PEn,mに前記トランジスタMn,mを介して接続された前記ソースバスラインSL1~SLkに対して、振幅のより小さい前記ソース信号#SL1~#SLkを供給し、
予め定められた基準振幅以上の振幅の前記ソース信号#SLmを供給する場合には、
前記他の一方の対向電極ドライバ(対向電極ドライバ142)が前記他の一方の対向電極バスライン(対向電極バスラインCOMLRn)に振幅のより小さい前記矩形状の電圧信号(対向電極信号#COMLRn)を供給する場合に、前記他の一方の対向電極バスラインに接続された前記対向電極ECOMn,r(r≧k+1)に対向する前記画素電極PEn,rに前記トランジスタMn,rを介して接続された前記ソースバスラインSLk+1~SLMに対して、振幅のより小さい前記ソース信号#SLk+1~#SLMを供給し、
前記他の一方の対向電極ドライバ(対向電極ドライバ142)が前記他の一方の対向電極バスライン(対向電極バスラインCOMLRn)に振幅のより大きい前記矩形状の電圧信号(対向電極信号#COMLRn)を供給する場合に、前記他の一方の対向電極バスラインに接続された前記対向電極ECOMn,r(r≧k+1)に対向する前記画素電極PEn,rに前記トランジスタMn,rを介して接続された前記ソースバスラインSLk+1~SLMに対して、振幅のより大きい前記ソース信号#SLk+1~#SLMを供給する。
実施形態1~3においては、主に、ライン反転駆動方式に対する本発明の適用について説明を行ったが、本発明はこれに限定されるものではない。以下では、隣り合う画素電極に対して、互いに反対極性のソース信号が供給されるドット反転駆動方式に対して本発明を適用した場合について図22および図23を参照して説明を行う。
以上のように、本発明に係る表示パネルは、複数のゲートバスラインと、複数のソースバスラインと、複数の対向電極バスラインと、前記複数のゲートバスラインのうち任意のゲートバスラインに接続されたゲートと、前記複数のソースバスラインのうち任意のソースバスラインに接続されたソースとを備えたトランジスタと、前記トランジスタのドレインに接続された画素電極と、液晶を介して前記画素電極に対向する対向電極であって、前記複数の対向電極バスラインのうち任意の対向電極バスラインに接続された対向電極と、前記複数のソースバスラインのそれぞれの一端に接続され、前記任意のソースバスラインに対してソース信号を供給するソースドライバと、前記複数のゲートバスラインのそれぞれの一端に接続され、前記トランジスタを導通させる導通信号を前記任意のゲートバスラインに対して逐次的に供給するゲートドライバと、を備えた表示パネルであって、前記ゲートドライバが前記任意のゲートバスラインに対して前記導通信号を供給してから次の前記導通信号を供給するまでの1走査期間において、前記任意の対向電極バスラインに対し、少なくとも第1の電圧レベルおよび前記第1の電圧レベルと異なる第2の電圧レベルからなる矩形状の電圧信号を供給する対向電極ドライバを備えている、ことを特徴としている。
に対し、前記矩形状の電圧信号を同期して供給する、ことが好ましい。
したがって、上記の構成によれば、上記一方の対向電極バスラインに接続された画素電極を備える画素領域と、上記他の一方の対向電極バスラインに接続された画素電極を備える画素領域とが、それぞれ上記動画ボケの現象の改善効果が異なる画像を表示することができるため、ユーザに対して、本発明による上記動画ボケの改善効果を訴求することができる。すなわち、ユーザに対して、本発明による上記動画ボケの改善効果を効果的にアピールすることができるという更なる効果を奏する。
前記ソースドライバは、
予め定められた基準ソース振幅未満の振幅の前記ソース信号を供給する場合には、
前記一方の対向電極ドライバが前記一方の対向電極バスラインに振幅のより小さい前記矩形状の電圧信号を供給する場合に、前記一方の対向電極バスラインに接続された前記対向電極に対向する前記画素電極に前記トランジスタを介して接続された前記ソースバスラインに対して、振幅のより大きい前記ソース信号を供給し、
前記一方の対向電極ドライバが前記一方の対向電極バスラインに振幅のより大きい前記矩形状の電圧信号を供給する場合に、前記一方の対向電極バスラインに接続された前記対向電極に対向する前記画素電極に前記トランジスタを介して接続された前記ソースバスラインに対して、振幅のより小さい前記ソース信号を供給し、
前記他の一方の対向電極ドライバが前記他の一方の対向電極バスラインに振幅のより小さい前記矩形状の電圧信号を供給する場合に、前記他の一方の対向電極バスラインに接続された前記対向電極に対向する前記画素電極に前記トランジスタを介して接続された前記ソースバスラインに対して、振幅のより大きい前記ソース信号を供給し、
前記他の一方の対向電極ドライバが前記他の一方の対向電極バスラインに振幅のより大きい前記矩形状の電圧信号を供給する場合に、前記他の一方の対向電極バスラインに接続された前記対向電極に対向する前記画素電極に前記トランジスタを介して接続された前記ソースバスラインに対して、振幅のより小さい前記ソース信号を供給し、
予め定められた基準ソース振幅以上の振幅の前記ソース信号を供給する場合には、
前記一方の対向電極ドライバが前記一方の対向電極バスラインに振幅のより小さい前記矩形状の電圧信号を供給する場合に、前記一方の対向電極バスラインに接続された前記対向電極に対向する前記画素電極に前記トランジスタを介して接続された前記ソースバスラインに対して、振幅のより小さい前記ソース信号を供給し、
前記一方の対向電極ドライバが前記一方の対向電極バスラインに振幅のより大きい前記矩形状の電圧信号を供給する場合に、前記一方の対向電極バスラインに接続された前記対向電極に対向する前記画素電極に前記トランジスタを介して接続された前記ソースバスラインに対して、振幅のより大きい前記ソース信号を供給し、
前記他の一方の対向電極ドライバが前記他の一方の対向電極バスラインに振幅のより小さい前記矩形状の電圧信号を供給する場合に、前記他の一方の対向電極バスラインに接続された前記対向電極に対向する前記画素電極に前記トランジスタを介して接続された前記ソースバスラインに対して、振幅のより小さい前記ソース信号を供給し、
前記他の一方の対向電極ドライバが前記他の一方の対向電極バスラインに振幅のより大きい前記矩形状の電圧信号を供給する場合に、前記他の一方の対向電極バスラインに接続された前記対向電極に対向する前記画素電極に前記トランジスタを介して接続された前記ソースバスラインに対して、振幅のより大きい前記ソース信号を供給する、ことが好ましい。
11 制御部
12 ソースドライバ
13 ゲートドライバ
14 対向電極ドライバ
15 補助容量ドライバ
16 表示部
SLm ソースバスライン
GLn ゲートバスライン
COMLn 対向電極バスライン
CSL 補助容量バスライン
Pn,m 画素領域
PEn,m 画素電極
Mn,m トランジスタ
ECOMn,m 対向電極
Claims (32)
- 複数のゲートバスラインと、
複数のソースバスラインと、
複数の対向電極バスラインと、
前記複数のゲートバスラインのうち任意のゲートバスラインに接続されたゲートと、前記複数のソースバスラインのうち任意のソースバスラインに接続されたソースとを備えたトランジスタと、
前記トランジスタのドレインに接続された画素電極と、
液晶を介して前記画素電極に対向する対向電極であって、前記複数の対向電極バスラインのうち任意の対向電極バスラインに接続された対向電極と、
前記複数のソースバスラインのそれぞれの一端に接続され、前記任意のソースバスラインに対してソース信号を供給するソースドライバと、
前記複数のゲートバスラインのそれぞれの一端に接続され、前記トランジスタを導通させる導通信号を前記任意のゲートバスラインに対して逐次的に供給するゲートドライバと、
を備えた表示パネルであって、
前記ゲートドライバが前記任意のゲートバスラインに対して前記導通信号を供給してから次の前記導通信号を供給するまでの1走査期間において、前記任意の対向電極バスラインに対し、少なくとも第1の電圧レベルおよび前記第1の電圧レベルと異なる第2の電圧レベルからなる矩形状の電圧信号を供給する対向電極ドライバを備えている、
ことを特徴とする表示パネル。 - 前記対向電極ドライバは、前記1走査期間において、前記任意の対向電極バスラインに対し、前記導通信号に同期して、少なくとも前記第1の電圧レベルおよび前記第2の電圧レベルからなる矩形状の電圧信号を供給する、
ことを特徴とする請求項1に記載の表示パネル。 - 前記矩形状の電圧信号は、前記1走査期間の少なくとも10パーセントの期間において、前記第1の電圧レベルまたは前記第2の電圧レベルのうち一方の値の電圧レベルをとる、
ことを特徴とする請求項1または2に記載の表示パネル。 - 前記矩形状の電圧信号は、前記1走査期間の開始から前記1走査期間の略10パーセントの期間が経過するまでの期間において、前記第1の電圧レベルまたは前記第2の電圧レベルのうち一方の電圧レベルをとり、前記1走査期間の略90パーセントの期間が経過してから前記1走査期間が終了するまでの期間において、前記第1の電圧レベルまたは前記第2の電圧レベルのうち他の一方の電圧レベルをとる、
ことを特徴とする請求項1から3の何れか1項に記載の表示パネル。 - 前記1走査期間において、前記矩形状の電圧信号が前記第1の電圧レベルであるときの前記画素電極の電位と前記対向電極の電位との差によって表される前記液晶への印加電圧の極性と、前記矩形状の電圧信号が前記第2の電圧レベルであるときの前記画素電極の電位と前記対向電極の電位との差によって表される前記液晶への印加電圧の極性とは、互いに異なった極性である、
ことを特徴とする請求項1から4の何れか1項に記載の表示パネル。 - 前記第1の電圧レベルと、前記第2の電圧レベルとの電位差の絶対値は、液晶の閾値電圧の2倍以下である、
ことを特徴とする請求項1から5の何れか1項に記載の表示パネル。 - 前記対向電極ドライバは、前記1走査期間において、前記任意の対向電極バスラインに対し、前記第1の電圧レベルと、前記第2の電圧レベルと、前記第1の電圧レベルおよび前記第2の電圧レベルの何れとも異なる第3の電圧レベルとからなる矩形状の電圧信号を供給する、
ことを特徴とする請求項1または2に記載の表示パネル。 - 前記矩形状の電圧信号は、前記1走査期間の少なくとも10パーセントの期間において、前記第1の電圧レベル、前記第2の電圧レベル、または、前記第3の電圧レベルのうち、何れかの電圧レベルをとる、
ことを特徴とする請求項7に記載の表示パネル。 - 前記矩形状の電圧信号は、前記1走査期間の開始から前記1走査期間の略10パーセントの期間が経過するまでの期間において、前記第1の電圧レベル、前記第2の電圧レベル、または、前記第3の電圧レベルのうち何れか1つの電圧レベルをとり、前記1走査期間の略90パーセントの期間が経過してから前記1走査期間が終了するまでの期間において、前記第1の電圧レベル、前記第2の電圧レベル、または、前記第3の電圧レベルのうち他の1つの電圧レベルをとる、
ことを特徴とする請求項7または8に記載の表示パネル。 - 前記1走査期間において、最初の前記電圧レベルの遷移後における前記画素電極の電位と前記対向電極の電位との差によって表される前記液晶への印加電圧の極性と、次の前記電圧レベルの遷移後における前記画素電極の電位と前記対向電極の電位との差によって表される前記液晶への印加電圧の極性とは、互いに異なった極性である、
ことを特徴とする請求項7から9の何れか1項に記載の表示パネル。 - 前記第1の電圧レベル、前記第2の電圧レベル、および、前記第3の電圧レベルのうち、中間の電圧レベルと、前記第1の電圧レベル、前記第2の電圧レベル、および、前記第3の電圧レベルのうち、最も低い電圧レベルとの電位差の絶対値は、液晶の閾値電圧の2倍以下である、
ことを特徴とする請求項7から10の何れか1項に記載の表示パネル。 - 前記対向電極ドライバは、前記1走査期間において、前記任意の対向電極バスラインに対し、前記第1の電圧レベルと、前記第2の電圧レベルと、前記第1の電圧レベルおよび前記第2の電圧レベルの何れとも異なる第3の電圧レベルとからなる矩形状の電圧信号を供給し、前記1走査期間の次の1走査期間において、前記第1の電圧レベル、前記第2の電圧レベル、および、前記第3の電圧レベルのうち、何れか2つの電圧レベルと、前記第1の電圧レベル、前記第2の電圧レベル、および、前記第3の電圧レベルの何れとも異なる第4の電圧レベルとからなる矩形状の電圧信号を供給する、
ことを特徴とする請求項1または2に記載の表示パネル。 - 前記1走査期間における最初の前記電圧レベルの遷移の前後における前記電圧レベルの電位差の絶対値は、前記1走査期間における次の前記電圧レベルの遷移の前後における前記電圧レベルの電位差の絶対値よりも小さい、
ことを特徴とする請求項12に記載の表示パネル。 - 前記矩形状の電圧信号は、前記1走査期間の少なくとも10パーセントの期間において、前記第1の電圧レベル、前記第2の電圧レベル、前記第3の電圧レベル、または、前記第4の電圧レベルのうち、何れかの電圧レベルをとる、
ことを特徴とする請求項12または13に記載の表示パネル。 - 前記矩形状の電圧信号は、前記1走査期間の開始から前記1走査期間の略10パーセントの期間が経過するまでの期間において、前記第1の電圧レベル、前記第2の電圧レベル、前記第3の電圧レベル、または、前記第4の電圧レベルのうち何れか1つの電圧レベルをとり、前記1走査期間の略90パーセントの期間が経過してから前記1走査期間が終了するまでの期間において、前記第1の電圧レベル、前記第2の電圧レベル、前記第3の電圧レベル、または、前記第4の電圧レベルのうち他の1つの電圧レベルをとる、
ことを特徴とする請求項12から14の何れか1項に記載の表示パネル。 - 前記1走査期間において、最初の前記電圧レベルの遷移後における前記画素電極の電位と前記対向電極の電位との差によって表される前記液晶への印加電圧の極性と、次の前記電圧レベルの遷移後における前記画素電極の電位と前記対向電極の電位との差によって表される前記液晶への印加電圧の極性とは、互いに異なった極性である、
ことを特徴とする請求項12から15の何れか1項に記載の表示パネル。 - 前記第1の電圧レベル、前記第2の電圧レベル、前記第3の電圧レベル、および、前記第4の電圧レベルのうち、2番目に高い電圧レベルと、前記第1の電圧レベル、前記第2の電圧レベル、前記第3の電圧レベル、および、前記第4の電圧レベルのうち、最も低い電圧レベルとの電位差の絶対値は、液晶の閾値電圧の2倍以下である、
ことを特徴とする請求項12から16の何れか1項に記載の表示パネル。 - 前記ゲートドライバが前記任意のゲートバスラインに対して前記導通信号を供給したときに、前記任意の対向電極バスラインに対して、前記電圧レベルのうち最も高い電圧レベルが供給されている場合には、
前記対向電極ドライバは、前記任意の対向電極バスラインに対して、前記1走査期間において、前記電圧レベルが降順である前記矩形状の電圧信号を供給する、
ことを特徴とする請求項1から17の何れか1項に記載の表示パネル。 - 前記ゲートドライバが前記任意のゲートバスラインに対して前記導通信号を供給したときに、前記任意の対向電極バスラインに対して、前記電圧レベルのうち最も低い電圧レベルが供給されている場合には、
前記対向電極ドライバは、前記任意の対向電極バスラインに対して、前記1走査期間において、前記電圧レベルが昇順である前記矩形状の電圧信号を供給する、
ことを特徴とする請求項1から18の何れか1項に記載の表示パネル。 - 前記対向電極ドライバは、
前記複数のゲートバスラインのうちn番目のゲートバスラインに前記トランジスタを介して接続された前記画素電極に対向する前記対向電極が接続された前記対向電極バスラインと、
前記複数のゲートバスラインのうちn+1番目のゲートバスラインに前記トランジスタを介して接続された前記画素電極に対向する前記対向電極が接続された前記対向電極バスラインと、
に対し、前記矩形状の電圧信号を同期して供給する、
ことを特徴とする請求項1から19の何れか1項に記載の表示パネル。 - 前記対向電極ドライバは、
前記複数のゲートバスラインのうちn番目のゲートバスラインに前記トランジスタを介して接続された前記画素電極に対向する前記対向電極が接続された前記対向電極バスラインと、
前記複数のゲートバスラインのうちn+2番目のゲートバスラインに前記トランジスタを介して接続された前記画素電極に対向する前記対向電極が接続された前記対向電極バスラインと、
に対し、前記矩形状の電圧信号を同期して供給する、
ことを特徴とする請求項1から19の何れか1項に記載の表示パネル。 - 前記複数のゲートバスラインの本数は偶数であり、
前記複数の対向電極バスラインの本数は、前記ゲートバスラインの本数の半数であり、
前記複数のゲートバスラインのうち2k-1番目(kは自然数)のゲートバスラインに前記トランジスタを介して接続された前記画素電極に対向する前記対向電極と、
前記複数のゲートバスラインのうち2k番目のゲートバスラインに前記トランジスタを介して接続された前記画素電極に対向する前記対向電極とが、
前記複数の対向電極バスラインのうちk番目の対向電極バスラインに接続されている、
ことを特徴とする請求項1から19の何れか1項に記載の表示パネル。 - 前記対向電極ドライバは、前記矩形状の電圧信号の振幅の大きさを変更する振幅変更手段を備えている、
ことを特徴とする請求項1から22の何れか1項に記載の表示パネル。 - 前記ソースドライバは、
予め定められた基準振幅未満の振幅の前記ソース信号を供給する場合には、
前記矩形状の電圧信号の振幅がより小さいときに、より振幅の大きな前記ソース信号を供給し、前記矩形状の電圧信号の振幅がより大きいときに、より振幅の小さな前記ソース信号を供給し、
予め定められた基準振幅以上の振幅の前記ソース信号を供給する場合には、
前記矩形状の電圧信号の振幅がより小さいときに、より振幅の小さな前記ソース信号を供給し、前記矩形状の電圧信号の振幅がより大きいときに、より振幅の大きな前記ソース信号を供給する、
ことを特徴とする請求項23に記載の表示パネル。 - 2つの前記対向電極ドライバを備え、
前記任意の対向電極バスラインは、絶縁部を介して同一直線上に形成された2本の対向電極バスラインから構成され、
2つの前記対向電極ドライバのうち一方の前記対向電極ドライバは、
前記1走査期間において、前記2本の対向電極バスラインのうち一方の対向電極バスラインに対し、前記導通信号に同期して、第1の電圧レベルおよび前記第1の電圧レベルと異なる第2の電圧レベルからなる矩形状の電圧信号を供給し、
2つの前記対向電極ドライバのうち他の一方の前記対向電極ドライバは、
前記1走査期間において、前記2本の対向電極バスラインのうち他の一方の対向電極バスラインに対し、前記導通信号に同期して、第1の電圧レベルおよび前記第1の電圧レベルと異なる第2の電圧レベルからなる矩形状の電圧信号を供給する、
ことを特徴とする請求項1から24の何れか1項に記載の表示パネル。 - 前記ソースドライバは、
前記一方の対向電極バスラインに接続された前記対向電極に対向する前記画素電極に前記トランジスタを介して接続された前記ソースバスラインと、前記他の一方の対向電極バスラインに接続された前記対向電極に対向する前記画素電極に前記トランジスタを介して接続された前記ソースバスラインとに対し、それぞれ振幅の異なったソース信号を供給する、
ことを特徴とする請求項25に記載の表示パネル。 - 前記一方の対向電極バスラインの長さは、前記任意の対向電極バスラインの長さの略45パーセントから略55パーセントの長さであり、前記他の一方の対向電極バスラインの長さは、前記任意の対向電極バスラインの長さから前記一方の対向電極バスラインの長さを引いた長さに略等しい、ことを特徴とする請求項25または26に記載の表示パネル。
- 前記一方の対向電極ドライバは、前記矩形状の電圧信号の振幅の大きさを変更する第1の振幅変更手段を備えており、前記他の一方の対向電極ドライバは、前記矩形状の電圧信号の振幅の大きさを変更する第2の振幅変更手段を備えている、
ことを特徴とする請求項25から27の何れか1項に記載の表示パネル。 - 前記ソースドライバは、
予め定められた基準振幅未満の振幅の前記ソース信号を供給する場合には、
前記一方の対向電極ドライバが前記一方の対向電極バスラインに振幅のより小さい前記矩形状の電圧信号を供給する場合に、前記一方の対向電極バスラインに接続された前記対向電極に対向する前記画素電極に前記トランジスタを介して接続された前記ソースバスラインに対して、振幅のより大きい前記ソース信号を供給し、
前記一方の対向電極ドライバが前記一方の対向電極バスラインに振幅のより大きい前記矩形状の電圧信号を供給する場合に、前記一方の対向電極バスラインに接続された前記対向電極に対向する前記画素電極に前記トランジスタを介して接続された前記ソースバスラインに対して、振幅のより小さい前記ソース信号を供給し、
前記他の一方の対向電極ドライバが前記他の一方の対向電極バスラインに振幅のより小さい前記矩形状の電圧信号を供給する場合に、前記他の一方の対向電極バスラインに接続された前記対向電極に対向する前記画素電極に前記トランジスタを介して接続された前記ソースバスラインに対して、振幅のより大きい前記ソース信号を供給し、
前記他の一方の対向電極ドライバが前記他の一方の対向電極バスラインに振幅のより大きい前記矩形状の電圧信号を供給する場合に、前記他の一方の対向電極バスラインに接続された前記対向電極に対向する前記画素電極に前記トランジスタを介して接続された前記ソースバスラインに対して、振幅のより小さい前記ソース信号を供給し、
予め定められた基準振幅以上の振幅の前記ソース信号を供給する場合には、
前記一方の対向電極ドライバが前記一方の対向電極バスラインに振幅のより小さい前記矩形状の電圧信号を供給する場合に、前記一方の対向電極バスラインに接続された前記対向電極に対向する前記画素電極に前記トランジスタを介して接続された前記ソースバスラインに対して、振幅のより小さい前記ソース信号を供給し、
前記一方の対向電極ドライバが前記一方の対向電極バスラインに振幅のより大きい前記矩形状の電圧信号を供給する場合に、前記一方の対向電極バスラインに接続された前記対向電極に対向する前記画素電極に前記トランジスタを介して接続された前記ソースバスラインに対して、振幅のより大きい前記ソース信号を供給し、
前記他の一方の対向電極ドライバが前記他の一方の対向電極バスラインに振幅のより小さい前記矩形状の電圧信号を供給する場合に、前記他の一方の対向電極バスラインに接続された前記対向電極に対向する前記画素電極に前記トランジスタを介して接続された前記ソースバスラインに対して、振幅のより小さい前記ソース信号を供給し、
前記他の一方の対向電極ドライバが前記他の一方の対向電極バスラインに振幅のより大きい前記矩形状の電圧信号を供給する場合に、前記他の一方の対向電極バスラインに接続された前記対向電極に対向する前記画素電極に前記トランジスタを介して接続された前記ソースバスラインに対して、振幅のより大きい前記ソース信号を供給する、
ことを特徴とする請求項28に記載の表示パネル。 - 前記複数のゲートバスラインのうちn番目のゲートバスラインと、前記複数のソースラインのうちm番目のソースバスラインとに接続された前記トランジスタに接続された前記画素電極に対向する前記対向電極は、前記複数の対向電極バスラインのうち、n番目の対向電極バスラインに接続され、
前記複数のゲートバスラインのうちn番目のゲートバスラインと、前記複数のソースラインのうちm+1番目のソースバスラインとに接続された前記トランジスタに接続された前記画素電極に対向する前記対向電極は、前記複数の対向電極バスラインのうち、n-1番目の対向電極バスラインに接続されている、
ことを特徴とする請求項1から24の何れか1項に記載の表示パネル。 - 請求項1から30の何れか1項に記載の表示パネルを備えている、
ことを特徴とする液晶表示装置。 - 複数のゲートバスラインと、
複数のソースバスラインと、
複数の対向電極バスラインと、
前記複数のゲートバスラインのうち任意のゲートバスラインに接続されたゲートと、前記複数のソースバスラインのうち任意のソースバスラインに接続されたソースとを備えたトランジスタと、
前記トランジスタのドレインに接続された画素電極と、
液晶を介して前記画素電極に対向する対向電極であって、前記複数の対向電極バスラインのうち任意の対向電極バスラインに接続された対向電極と、
前記複数のソースバスラインのそれぞれの一端に接続され、前記任意のソースバスラインに対してソース信号を供給するソースドライバと、
前記複数のゲートバスラインのそれぞれの一端に接続され、前記トランジスタを導通させる導通信号を前記任意のゲートバスラインに対して逐次的に供給するゲートドライバと、
を備えた表示パネルを駆動する駆動方法であって、
前記ゲートドライバが前記任意のゲートバスラインに対して前記導通信号を供給してから次の前記導通信号を供給するまでの1走査期間において、前記任意の対向電極バスラインに対し、少なくとも第1の電圧レベルおよび前記第1の電圧レベルと異なる第2の電圧レベルからなる矩形状の電圧信号を供給する電圧信号供給工程を含んでいる、
ことを特徴とする駆動方法。
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JP2011545114A JP5529166B2 (ja) | 2009-12-11 | 2010-09-27 | 表示パネル、液晶表示装置、および、駆動方法 |
CN201080055764.0A CN102652333B (zh) | 2009-12-11 | 2010-09-27 | 显示面板、液晶显示装置和驱动方法 |
US13/514,300 US20120235984A1 (en) | 2009-12-11 | 2010-09-27 | Display panel, liquid crystal display, and driving method |
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JP (1) | JP5529166B2 (ja) |
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US20120242646A1 (en) * | 2009-12-11 | 2012-09-27 | Sharp Kabushiki Kaisha | Display panel, liquid crystal display, and driving method |
US9041453B2 (en) * | 2013-04-04 | 2015-05-26 | Semiconductor Energy Laboratory Co., Ltd. | Pulse generation circuit and semiconductor device |
CN111243476A (zh) * | 2018-11-28 | 2020-06-05 | 中华映管股份有限公司 | 显示装置 |
CN110211525A (zh) * | 2019-05-27 | 2019-09-06 | 福建华佳彩有限公司 | 一种面板设计架构 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0635417A (ja) * | 1992-07-22 | 1994-02-10 | Oki Electric Ind Co Ltd | アクティブマトリクス型薄膜トランジスタ液晶パネルの駆動方法 |
JP2001265287A (ja) * | 2000-03-15 | 2001-09-28 | Sharp Corp | アクティブマトリクス型表示装置およびその駆動方法 |
JP2004251980A (ja) * | 2003-02-18 | 2004-09-09 | Seiko Epson Corp | 表示装置の駆動回路及び駆動方法、並びに表示装置及び投射型表示装置 |
JP2009008919A (ja) * | 2007-06-28 | 2009-01-15 | Sharp Corp | 液晶表示装置 |
JP2009098587A (ja) * | 2007-10-16 | 2009-05-07 | Samsung Electronics Co Ltd | 液晶表示装置 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03168617A (ja) * | 1989-11-28 | 1991-07-22 | Matsushita Electric Ind Co Ltd | 表示装置の駆動方法 |
JP5177999B2 (ja) * | 2006-12-05 | 2013-04-10 | 株式会社半導体エネルギー研究所 | 液晶表示装置 |
KR101352343B1 (ko) * | 2006-12-11 | 2014-01-15 | 삼성디스플레이 주식회사 | 액정표시장치 |
BRPI0822404A2 (pt) * | 2008-03-11 | 2019-09-24 | Sharp Kk | circuito acionador, método de acionamento, painel de tela de cristal líquido, módulo de cristal líquido, e dispositivo de tela de cristal líquido |
GB2458957B (en) * | 2008-04-04 | 2010-11-24 | Sony Corp | Liquid crystal display module |
KR20100076230A (ko) * | 2008-12-26 | 2010-07-06 | 삼성전자주식회사 | 액정표시장치 및 그 표시방법 |
EP2434339B1 (en) * | 2009-05-21 | 2015-09-30 | Sharp Kabushiki Kaisha | Liquid crystal panel |
-
2010
- 2010-09-27 WO PCT/JP2010/066717 patent/WO2011070838A1/ja active Application Filing
- 2010-09-27 JP JP2011545114A patent/JP5529166B2/ja not_active Expired - Fee Related
- 2010-09-27 US US13/514,300 patent/US20120235984A1/en not_active Abandoned
- 2010-09-27 CN CN201080055764.0A patent/CN102652333B/zh not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0635417A (ja) * | 1992-07-22 | 1994-02-10 | Oki Electric Ind Co Ltd | アクティブマトリクス型薄膜トランジスタ液晶パネルの駆動方法 |
JP2001265287A (ja) * | 2000-03-15 | 2001-09-28 | Sharp Corp | アクティブマトリクス型表示装置およびその駆動方法 |
JP2004251980A (ja) * | 2003-02-18 | 2004-09-09 | Seiko Epson Corp | 表示装置の駆動回路及び駆動方法、並びに表示装置及び投射型表示装置 |
JP2009008919A (ja) * | 2007-06-28 | 2009-01-15 | Sharp Corp | 液晶表示装置 |
JP2009098587A (ja) * | 2007-10-16 | 2009-05-07 | Samsung Electronics Co Ltd | 液晶表示装置 |
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US20120235984A1 (en) | 2012-09-20 |
CN102652333A (zh) | 2012-08-29 |
JPWO2011070838A1 (ja) | 2013-04-22 |
CN102652333B (zh) | 2015-07-01 |
JP5529166B2 (ja) | 2014-06-25 |
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