WO2018159120A1 - Liquid crystal display device and electronic apparatus - Google Patents

Liquid crystal display device and electronic apparatus Download PDF

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Publication number
WO2018159120A1
WO2018159120A1 PCT/JP2018/001042 JP2018001042W WO2018159120A1 WO 2018159120 A1 WO2018159120 A1 WO 2018159120A1 JP 2018001042 W JP2018001042 W JP 2018001042W WO 2018159120 A1 WO2018159120 A1 WO 2018159120A1
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Prior art keywords
liquid crystal
video signal
display device
pixel
crystal display
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PCT/JP2018/001042
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French (fr)
Japanese (ja)
Inventor
浩一 甘利
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ソニー株式会社
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Application filed by ソニー株式会社 filed Critical ソニー株式会社
Priority to CN201880014401.9A priority Critical patent/CN110383371A/en
Priority to JP2019502493A priority patent/JP7054480B2/en
Publication of WO2018159120A1 publication Critical patent/WO2018159120A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • 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
    • 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

Definitions

  • This disclosure relates to a liquid crystal display device and an electronic device.
  • a liquid crystal display device in the case of DC driving in which a DC voltage is applied to a liquid crystal layer, the lifetime of the liquid crystal is shortened by continuing to apply a DC voltage to the liquid crystal layer. Therefore, in the liquid crystal display device, AC driving is performed in which an AC voltage is applied to the liquid crystal layer.
  • an AC-driven liquid crystal display device in order to be able to arbitrarily set an AC drive frequency, two holding capacitors are provided in the pixel, and a positive video signal and a negative video signal are held in two systems. These holding voltages are alternately applied to the pixel electrodes of the liquid crystal portion (see, for example, Patent Document 1).
  • the area occupied by the storage capacitor is larger than when one storage capacitor is provided. For this reason, the bright spot defect / dark spot defect due to the leakage of the pixel potential due to the defect of the storage capacitor becomes larger than that in the case of one storage capacitor.
  • the chip will be treated as a defective product. It can be a big factor to lower.
  • an object of the present disclosure is to provide a liquid crystal display device capable of suppressing the occurrence of defective bright spots and improving the yield, and an electronic apparatus having the liquid crystal display device.
  • a liquid crystal display device of the present disclosure is provided.
  • LCD drive circuit A pixel including A common voltage whose polarity is periodically inverted in synchronization with the positive polarity video signal and the negative polarity video signal is applied to the common electrode in common for all pixels, Potentials with different polarities are applied as reference potentials to the two storage capacitors. It has a configuration.
  • an electronic apparatus according to the present disclosure for achieving the above object includes the liquid crystal display device having the above structure.
  • the reference potentials of the two storage capacitors are set to potentials having different polarities.
  • the pixel potential can leak in the same potential direction as the common voltage.
  • the pixel potential leaks in the same potential direction as the common voltage, so that a pixel defect that becomes a bright spot can be darkened.
  • pixel defects caused by pixel potential leakage due to storage capacitor defects cannot be visually recognized, and the occurrence of bright spot defects can be suppressed.
  • the present disclosure it is possible to suppress the occurrence of a bright spot defect by making a pixel defect that becomes a bright spot a dark spot, thereby improving the yield.
  • the effects described here are not necessarily limited, and any of the effects described in the present specification may be used.
  • the effect described in this specification is an illustration to the last, Comprising: It is not limited to this, There may be an additional effect.
  • FIG. 1 is a system configuration diagram illustrating an example of a system configuration of an active matrix liquid crystal display device.
  • FIG. 2A is a circuit diagram illustrating a circuit configuration of the pixel circuit according to the first embodiment.
  • FIG. 2B is a timing waveform diagram illustrating waveforms of the video signal V sig and the common voltage V com in the pixel circuit according to the first embodiment. is there.
  • FIG. 3A is a circuit diagram illustrating a circuit configuration of a pixel circuit according to a reference example
  • FIG. 3B is a timing waveform diagram illustrating waveforms of a video signal V sig and a common voltage V com in the pixel circuit according to the reference example.
  • FIG. 1 is a system configuration diagram illustrating an example of a system configuration of an active matrix liquid crystal display device.
  • FIG. 2A is a circuit diagram illustrating a circuit configuration of the pixel circuit according to the first embodiment.
  • FIG. 2B is a timing waveform diagram illustrating waveforms of the video signal
  • FIG. 4A is a circuit diagram illustrating a circuit configuration of the pixel circuit according to the second embodiment
  • FIG. 4B is a timing waveform diagram illustrating waveforms of the video signal V sig and the common voltage V com in the pixel circuit according to the second embodiment. is there.
  • FIG. 5 is a cross-sectional view showing an example of a cross-sectional structure of the LCOS device.
  • FIG. 6 is a schematic configuration diagram illustrating a basic configuration of a projection display device (projector) according to a specific example 1 of the electronic apparatus of the present disclosure.
  • FIG. 7 is an external view illustrating an example of a head mounted display according to a specific example 2 of the electronic apparatus of the present disclosure.
  • Example 2 Example of TN (Twisted Nematic) type liquid crystal molecular arrangement) 3-4.
  • Example 3 Example of LCOS (Liquid Crystal on Silicon) device) 3-5.
  • Modification 4 4. Electronic device of the present disclosure 4-1. Specific Example 1 (Example of Projection Display Device) 4-2.
  • Example 2 (example of head mounted display) 5). Configurations that can be taken by the present disclosure
  • liquid crystal display device and the electronic apparatus for the liquid crystal drive circuit unit, two systems of taking in positive and negative video signals supplied through signal lines alternately into two storage capacitors.
  • the first transfer gate unit and two systems of second transfer gate units that alternately apply the holding voltages of the two storage capacitors to the pixel electrodes of the liquid crystal unit collectively for all pixels can be employed.
  • the reference potential of the storage capacitor that holds the positive video signal is set to the ground potential
  • a configuration in which a reference potential of a storage capacitor that holds a negative video signal is set to a power supply potential can be employed.
  • the reference potential of the storage capacitor that holds the positive video signal is set to the power supply potential
  • the reference potential of the storage capacitor that holds the negative video signal is set to the ground potential. It can be set as the structure to set.
  • the liquid crystal layer and the liquid crystal driving circuit unit may be configured on the semiconductor substrate.
  • the two storage capacitors have a structure including a gate capacitance structure formed between the gate electrode of the transistor and the semiconductor substrate, or an MIM (Metal-Insulator-Metal) structure formed on the wiring. be able to.
  • An active matrix type liquid crystal display device is a so-called active matrix drive type display in which independent pixel electrodes are arranged for each pixel and a switching element is connected to each pixel electrode to selectively drive the pixel. Device.
  • a liquid crystal panel is formed by sealing liquid crystal between two substrates, a first substrate and a second substrate.
  • the first substrate is a TFT substrate in which, for example, a TFT (Thin Film Transistor) is formed as a switching element.
  • the second substrate is a counter substrate on which a color filter, a counter electrode, and the like are formed and provided to face the TFT substrate.
  • the liquid crystal orientation is controlled by switching control by a switching element and voltage application based on a video signal, and video display is performed by changing light transmittance / reflectance.
  • the active matrix liquid crystal display device includes a pixel array unit 20 in which pixels 10 are two-dimensionally arranged in a row direction and a column direction, and each pixel 10 in the pixel array unit 20. It has a pixel driver for driving.
  • the pixel driving unit includes a scanning line driving unit 30, a signal line driving unit 40, and the like.
  • the pixel array unit 20 has a pixel array of m rows and n columns.
  • Scan lines 51 1 to 51 m (hereinafter sometimes referred to as “scan line 51” in some cases) are wired for each pixel row to the pixel array of m rows and n columns, and a signal is provided for each pixel column.
  • Lines 52 1 to 52 n (hereinafter, may be described as “signal line 52” as a representative) are wired.
  • One end of the scanning line 51 is connected to the output end of the corresponding row of the scanning line driving unit 30.
  • One end of the signal line 52 is connected to the output end of the corresponding column of the signal line driving unit 40.
  • V com inversion drive In the active matrix type liquid crystal display device having the above-described configuration, so-called AC driving is performed in which the voltage applied to the liquid crystal is inverted at a constant cycle around the reference voltage using an AC-driven analog video signal.
  • the “AC drive analog video signal” refers to an analog video signal whose polarity is inverted at a predetermined cycle centered on a reference voltage V com (hereinafter referred to as “common voltage V com ”). To tell.
  • the common voltage V com is applied to the counter electrode (common electrode) of the liquid crystal unit.
  • the AC video driven analog video signal that is, a positive video signal and a negative video signal are alternately supplied from the signal line driving unit 40 to the signal lines 52 1 to 52 n .
  • the polarity of the common voltage V com applied to the counter electrode of the liquid crystal unit is periodically inverted in synchronization with the positive video signal and the negative video signal. In other words , so-called V com inversion driving is employed.
  • two holding capacitors are provided in the liquid crystal driving circuit unit for driving the liquid crystal unit, and a positive video signal and a negative video signal are separately held in the two holding capacitors, A configuration is employed in which these holding voltages are alternately applied to the pixel electrodes of the liquid crystal portion.
  • the voltage applied to the pixel electrode can be held in two storage capacitors for one display frame period, so that the AC drive frequency in V com inversion drive is not dependent on the vertical scanning frequency. Can be set arbitrarily.
  • the drive is 120 Hz.
  • the AC driving frequency in the V com inversion driving can be arbitrarily set regardless of the vertical scanning frequency.
  • a liquid crystal display device has two holding capacitors, holds a positive-polarity video signal and a negative-polarity video signal separately in two holding capacitors, and stores these holding voltages in a liquid crystal
  • the liquid crystal driving circuit unit that alternately applies to the pixel electrodes of the unit, a configuration is adopted in which potentials of different polarities are applied as reference potentials to the two storage capacitors.
  • a V com inversion driving liquid crystal display device in which a common voltage V com whose polarity is periodically inverted in synchronization with a positive polarity video signal and a negative polarity video signal is applied to the common electrode in common for all pixels.
  • Example 1 is an example in the case of a VA (Vertical Alignment) type liquid crystal molecule alignment.
  • the VA system is normally black, which has a minimum transmittance or reflectance when a voltage is not applied to the liquid crystal, resulting in a black screen.
  • FIG. 2A shows a circuit configuration of the pixel circuit according to the first embodiment
  • FIG. 2B shows waveforms of the video signal V sig and the common voltage V com in the pixel circuit according to the first embodiment.
  • the timing waveform diagram of FIG. 2B represents the state of 100% black.
  • the liquid crystal unit (liquid crystal element) 60 includes a pixel electrode 61, a counter electrode (common electrode) 62 facing the pixel electrode 61, and a liquid crystal layer 63 sealed between the pixel electrode 61 and the counter electrode 62.
  • a common voltage V com whose polarity is periodically inverted in synchronization with the polarity inversion of the video signal V sig is applied to the counter electrode 62 in common for all the pixels.
  • a video signal V sig whose polarity is periodically inverted is supplied to the liquid crystal drive circuit unit 70 that drives the liquid crystal unit 60 through the signal line 52.
  • Liquid crystal drive circuit 70 a first phase to process the positive polarity of the video signal V sig (so-called, P (Positive) phase), and a second phase of processing a video signal of negative polarity V sig (so-called, N ( Negative) phase), that is, a P-phase circuit and an N-phase circuit.
  • the P-phase circuit includes a first transfer gate portion 71_p , a storage capacitor 72_p , and a second transfer gate portion 73_p .
  • the input end of the first transfer gate portion 71_p is connected to the signal line 52.
  • One end of the storage capacitor 72_p and the input end of the second transfer gate portion 73_p are connected to the output end of the first transfer gate portion 71_p .
  • the ground potential GND is applied as a reference potential to the other end of the storage capacitor 72_p .
  • the pixel electrode 61 of the liquid crystal unit 60 is connected to the output terminal of the second transfer gate unit 73_p .
  • the first transfer gate portion 71_p and the second transfer gate portion 73_p are configured by, for example, a CMOS transfer gate in which a P-channel MOS transistor and an N-channel MOS transistor are connected in parallel.
  • the present invention is not limited to the CMOS transfer gate, and the first transfer gate portion 71_p and the second transfer gate portion 73_p can be configured by a single P-channel MOS transistor or a single N-channel MOS transistor. .
  • the N-phase circuit basically has the same circuit configuration as the P-phase circuit. That is, the N-phase circuit includes a first transfer gate portion 71_n , a storage capacitor 72_n , and a second transfer gate portion 73_n .
  • the input end of the first transfer gate portion 71_n is connected to the signal line 52.
  • One end of the storage capacitor 72_n and the input end of the second transfer gate portion 73_n are connected to the output end of the first transfer gate portion 71_n .
  • a power supply potential Vdd is applied as a reference potential to the other end of the storage capacitor 72_n .
  • the pixel electrode 61 of the liquid crystal unit 60 is connected to the output terminal of the second transfer gate unit 73_n .
  • the first transfer gate portion 71_n and the second transfer gate portion 73_n are configured by, for example, CMOS transfer gates in which a P-channel MOS transistor and an N-channel MOS transistor are connected in parallel.
  • the present invention is not limited to the CMOS transfer gate, and the first transfer gate portion 71_n and the second transfer gate portion 73_n can be configured by a single P-channel MOS transistor or a single N-channel MOS transistor. .
  • the reference potential of the P-phase storage capacitor 72_p is set to the ground potential GND, and the N-phase The reference potential of the storage capacitor 72_n is set to the power supply potential Vdd .
  • the reference potential of the storage capacitor 72 —n is the power supply potential V dd .
  • the pixel potential leaks in the same potential direction as the common voltage Vcom . Since the pixel potential leaks in the same potential direction as the common voltage V com , a pixel defect that becomes a bright spot when the reference potential of the storage capacitor 72 — n is the ground potential GND can be darkened. Further, since the pixel defect due to the leak of the pixel potential can no longer be visually recognized due to the disappearance of the bright spot, the occurrence of the bright spot defect can be suppressed and the defect occurrence rate as a chip can be reduced.
  • FIG. 3A shows a circuit configuration of a pixel circuit according to the reference example
  • FIG. 3B shows waveforms of the video signal V sig and the common voltage V com in the pixel circuit according to the reference example.
  • a case of a VA liquid crystal molecular arrangement is taken as an example.
  • the timing waveform diagram of FIG. 3B represents a state of 100% black.
  • the reference potentials of the P-phase storage capacitor 72_p and the N-phase storage capacitor 72_n are both set to the ground potential GND. ing.
  • the reference potential of the storage capacitor 72 —n is the ground potential GND.
  • Example 2 is an example in the case of a TN (Twisted Nematic) type liquid crystal molecular arrangement.
  • the TN method is normally white, in which the transmittance or reflectance is maximized when a voltage is not applied to the liquid crystal and a white screen is obtained.
  • FIG. 4A shows a circuit configuration of the pixel circuit according to the second embodiment
  • FIG. 4B shows waveforms of the video signal V sig and the common voltage V com in the pixel circuit according to the second embodiment.
  • the timing waveform diagram of FIG. 4B represents a state of 100% black.
  • V in the liquid crystal display device of TN type of com inversion driving to set the reference potential of the storage capacitor 72 _p the P phase to the power supply potential V dd
  • the reference of the storage capacitor 72 _n N-phase The potential is set to the ground potential GND.
  • the reference potential of the storage capacitor 72 —p is the power supply potential V dd.
  • the pixel potential leaks in the same potential direction as the common voltage Vcom .
  • a pixel defect that becomes a bright spot when the reference potential of the storage capacitor 72_p is the ground potential GND can be darkened. Further, since the pixel defect due to the leak of the pixel potential can no longer be visually recognized due to the disappearance of the bright spot, the occurrence of the bright spot defect can be suppressed and the defect occurrence rate as a chip can be reduced.
  • Example 3 In the liquid crystal display device according to the present embodiment, a device in which a liquid crystal layer is sandwiched between a semiconductor substrate and a transparent substrate facing the semiconductor substrate, for example, a liquid crystal layer is sandwiched between a silicon substrate and a transparent substrate.
  • An LCOS (Liquid Crystal on Silicon) device comprising:
  • the LCOS device has a structure in which a liquid crystal driving circuit unit 70 and a pixel electrode 61 are formed on a silicon substrate 81, and a liquid crystal layer 63 is sandwiched between transparent substrates 82 such as a glass substrate having an opposing electrode 62 on the inner surface.
  • the pixel electrode 61 is a reflective electrode made of aluminum or the like.
  • the counter electrode 62 is a transparent electrode made of IOT (Indium Tin Oxide) or the like.
  • An alignment layer 64 is interposed between the pixel electrode 61 and the liquid crystal layer 63, and an alignment layer 65 is interposed between the liquid crystal layer 63 and the counter electrode 62. The light that has passed through the counter electrode 62 and the liquid crystal layer 63 that are transparent substrates is reflected by the pixel electrode 61 that is a reflective electrode.
  • the storage capacitors 72_p and 72_n are formed between the gate electrodes of the transistors constituting the first transfer gate portions 71_p and 71_n or the second transfer gate portions 73_p and 73_n and the silicon substrate. It can be formed by a gate capacitance structure or an MIM (Metal-Insulator-Metal) structure formed on the wiring. In particular, when the pixel pitch is reduced, it is preferable to form the storage capacitors 72_p and 72_n with the MIM structure.
  • the cause of the capacity defect due to the MIM defect is increased as compared with the gate capacitance structure in which the insulating film is formed on the silicon substrate.
  • the occurrence of bright spot defects can be suppressed and the defect occurrence rate as a chip can be reduced.
  • the pixel pitch can be reduced.
  • the liquid crystal display device of the present disclosure described above is a display unit (display device) of an electronic device in any field that displays a video signal input to the electronic device or a video signal generated in the electronic device as an image or a video.
  • a display unit of a projection display device (projector), a head-mounted display, a digital still camera, a video camera, a mobile terminal device such as a mobile phone, a notebook personal computer, a television set, or the like.
  • the liquid crystal display device of the present disclosure includes a module-shaped one with a sealed configuration.
  • a display module formed by attaching a facing portion such as transparent glass to the pixel array portion is applicable.
  • the display module may have a configuration in which a circuit unit for inputting / outputting signals from the outside to the pixel array unit, a flexible printed circuit (FPC), and the like are provided.
  • FPC flexible printed circuit
  • the liquid crystal display device that is, the V com inversion driving liquid crystal display device that realizes surface collective driving using two storage capacitors can suppress the occurrence of bright spot defects and improve the yield. . Therefore, by using the liquid crystal display device of the present disclosure as the display unit (liquid crystal panel) of the electronic device, it is possible to reduce the defect occurrence rate as the electronic device.
  • a projection display device projector
  • a head mounted display will be exemplified.
  • the specific example illustrated here is only an example, and is not limited thereto.
  • FIG. 6 is a schematic configuration diagram illustrating a basic configuration of a projection display device (projector) according to a specific example 1 of the electronic apparatus of the present disclosure.
  • a single-plate projection display device is taken as an example of the projection display device.
  • the single-plate projection display device (projector) 100 includes a light source 101, a liquid crystal panel (display unit) 102, a beam splitter 103, and a projection lens 104.
  • the light source 101 repeatedly emits light of each color of R (red), G (green), and B (blue), which is necessary for color image display, at a predetermined cycle.
  • the light of each color emitted from the light source 101 is applied to the liquid crystal panel 102 through the beam splitter 103.
  • the liquid crystal panel 102 is composed of, for example, an LCOS device, and one pixel serving as a unit for forming a color image is configured by three subpixels R, G, and B.
  • a liquid crystal display device that is, a V com inversion driving liquid crystal display device that realizes surface collective driving using two storage capacitors can be used.
  • R image light, G image light, and B image light are sequentially emitted with a time difference, and are guided to the projection lens 104 through the beam splitter 103.
  • the projection lens 104 projects R image light, G image light, and B image light sequentially emitted from the liquid crystal panel 102 toward the screen 110.
  • the liquid crystal panel 102 sequentially emits light.
  • R image light, G image light, and B image light are projected onto the screen 110 with a time difference.
  • the R image, the G image, and the B image projected on the screen 110 with a time difference are combined and recognized as a color image by human eyes.
  • the liquid crystal display device of the present disclosure in the single-plate projection display device, the case where the liquid crystal display device of the present disclosure is used as a liquid crystal panel has been described as an example, but the present invention is not limited to application to a single-plate projection display device,
  • the liquid crystal display device of the present disclosure can be used as the liquid crystal panel.
  • a liquid crystal display device corresponding to each color of R, G, and B is used as the three liquid crystal panels, and color display is realized by synthesizing the images of the three plates.
  • a reflective device is used as the liquid crystal panel 102
  • a transmissive device may be used.
  • FIG. 7 is an external view illustrating an example of a head mounted display according to a specific example 2 of the electronic apparatus of the present disclosure.
  • the head mounted display 200 has a transmissive head mounted display configuration including a main body portion 201, an arm portion 202, and a lens barrel 203.
  • the main body unit 201 is connected to the arm unit 202 and the glasses 210. Specifically, the end of the main body 201 in the long side direction is attached to the arm 202.
  • One side of the side surface of the main body 201 is connected to the glasses 210 via a connection member (not shown).
  • the main body 201 may be directly attached to the head of a human body.
  • the main body unit 201 incorporates a control board and a display unit for controlling the operation of the head mounted display 200.
  • the arm unit 202 supports the lens barrel 203 with respect to the main body 201 by connecting the main body 201 and the lens barrel 203. Specifically, the arm portion 202 is coupled to the end portion of the main body portion 201 and the end portion of the lens barrel 203, thereby fixing the lens barrel 203 to the main body portion 201.
  • the arm unit 202 includes a signal line for communicating data related to an image provided from the main body unit 201 to the lens barrel 203.
  • the lens barrel 203 projects image light provided from the main body unit 201 via the arm unit 202 through the lens 211 of the glasses 210 toward the eyes of the user wearing the head mounted display 200.
  • the liquid crystal display device of the present disclosure that is, a V com inversion driving liquid crystal display device that realizes surface collective driving using two storage capacitors as a display unit incorporated in the main body unit 201. Can be used.
  • Liquid crystal display device >> [A-1] a pixel electrode, a counter electrode facing the pixel electrode, a liquid crystal unit having a liquid crystal layer sealed between the pixel electrode and the counter electrode, and There are two storage capacitors that hold the positive polarity video signal and the negative polarity video signal whose polarity changes periodically, and the holding voltages of the two retention capacitances are alternately applied to the pixel electrodes of the liquid crystal unit.
  • the liquid crystal drive circuit section is Two systems of first transfer gate portions for alternately taking in a positive video signal and a negative video signal supplied through a signal line into two storage capacitors; and Having two systems of second transfer gate sections for alternately applying the holding voltages of the two systems of holding capacitors to the pixel electrodes of the liquid crystal section collectively for all pixels; A liquid crystal display device according to A-1.
  • A-3 When the VA liquid crystal molecular arrangement is used, the reference potential of the holding capacitor for holding the positive video signal is set to the ground potential, and the reference potential of the holding capacitor for holding the negative video signal is set as the power source. Set to potential, A liquid crystal display device according to A-1 or A-2.
  • A-4 When the TN liquid crystal molecular arrangement is used, the reference potential of the storage capacitor holding the positive video signal is set to the power supply potential, and the reference potential of the storage capacitor holding the negative video signal is grounded. Set to potential, A liquid crystal display device according to A-1 or A-2.
  • A-5 The liquid crystal layer and the liquid crystal drive circuit section are formed on a semiconductor substrate. A liquid crystal display device according to any one of A-1 to A-4.
  • the two storage capacitors consist of a gate capacitor structure formed between the gate electrode of the transistor and the semiconductor substrate, or an MIM structure formed on the wiring.
  • a liquid crystal display device according to A-5. ⁇ B. Electronic equipment >> [B-1] a pixel electrode, a counter electrode facing the pixel electrode, a liquid crystal unit having a liquid crystal layer sealed between the pixel electrode and the counter electrode, and There are two storage capacitors that hold the positive polarity video signal and the negative polarity video signal whose polarity changes periodically, and the holding voltages of the two retention capacitances are alternately applied to the pixel electrodes of the liquid crystal unit.
  • LCD drive circuit A pixel including A common voltage whose polarity is periodically inverted in synchronization with the positive polarity video signal and the negative polarity video signal is applied to the common electrode in common for all pixels, Potentials with different polarities are applied as reference potentials to the two storage capacitors.
  • the liquid crystal drive circuit section Two systems of first transfer gate portions for alternately taking in a positive video signal and a negative video signal supplied through a signal line into two storage capacitors; and Having two systems of second transfer gate sections for alternately applying the holding voltages of the two systems of holding capacitors to the pixel electrodes of the liquid crystal section collectively for all pixels; A liquid crystal display device according to B-1.
  • the reference potential of the storage capacitor holding the positive video signal is set to the ground potential, and the reference potential of the storage capacitor holding the negative video signal is set to the power source.
  • the reference potential of the holding capacitor holding the positive video signal is set to the power supply potential, and the reference potential of the holding capacitor holding the negative video signal is grounded.
  • the liquid crystal layer and the liquid crystal drive circuit unit are formed on the semiconductor substrate.
  • the two storage capacitors consist of a gate capacitor structure formed between the gate electrode of the transistor and the semiconductor substrate, or an MIM structure formed on the wiring.

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Abstract

A liquid crystal display device according to the present disclosure is constituted by an arrangement of pixels that include a liquid crystal unit having a pixel electrode, a counter electrode facing the pixel electrode, and a liquid crystal layer interposed between the pixel electrode and the counter electrode, and a liquid crystal drive circuit unit having dual retention capacitors for separately retaining a positive polarity video signal and a negative polarity video signal the polarities of which cyclically change, the liquid crystal drive circuit unit alternately applying the retained voltages of the dual retention capacitors to the pixel electrode of the liquid crystal unit. Meanwhile, a common voltage the polarity of which cyclically changes in synchronism with the positive polarity video signal and the negative polarity video signal is applied to the counter electrode in common to all pixels, and potentials of different polarities are applied to the dual retention capacitors as a reference potential.

Description

液晶表示装置及び電子機器Liquid crystal display device and electronic device
　本開示は、液晶表示装置及び電子機器に関する。 This disclosure relates to a liquid crystal display device and an electronic device.
　液晶表示装置において、液晶層に直流電圧を印加する直流駆動の場合、液晶層に直流電圧を印加し続けることによって液晶の寿命が短くなる。そのため、液晶表示装置では、液晶層に交流電圧を印加する交流駆動が行われている。 In a liquid crystal display device, in the case of DC driving in which a DC voltage is applied to a liquid crystal layer, the lifetime of the liquid crystal is shortened by continuing to apply a DC voltage to the liquid crystal layer. Therefore, in the liquid crystal display device, AC driving is performed in which an AC voltage is applied to the liquid crystal layer.
　交流駆動の液晶表示装置において、交流駆動周波数を任意に設定できるようにするために、画素内に保持容量を２系統設け、正極性の映像信号と負極性の映像信号とを２系統の保持容量に別々に保持し、これらの保持電圧を液晶部の画素電極に交互に印加するようにしている（例えば、特許文献１参照）。 In an AC-driven liquid crystal display device, in order to be able to arbitrarily set an AC drive frequency, two holding capacitors are provided in the pixel, and a positive video signal and a negative video signal are held in two systems. These holding voltages are alternately applied to the pixel electrodes of the liquid crystal portion (see, for example, Patent Document 1).
特開２０１２－２２０５９４号公報JP 2012-220594 A
　上述したように、画素内に保持容量を２系統設けると、１系統設ける場合に比べて、保持容量が占める面積が大きくなる。そのため、保持容量の欠陥に伴う画素電位のリークに起因する輝点不良／滅点不良が、保持容量が１系統の場合よりも多くなる。特に輝点不良の場合、１チップ内に輝点（明るい画素）が２～３個でも存在すれば、そのチップは不良品扱いとなってしまうために、滅点不良の場合と違って歩留まりを下げる大きな要因となり得る。 As described above, when two storage capacitors are provided in a pixel, the area occupied by the storage capacitor is larger than when one storage capacitor is provided. For this reason, the bright spot defect / dark spot defect due to the leakage of the pixel potential due to the defect of the storage capacitor becomes larger than that in the case of one storage capacitor. In particular, in the case of a bright spot defect, if there are 2 or 3 bright spots (bright pixels) in one chip, the chip will be treated as a defective product. It can be a big factor to lower.
　そこで、本開示は、輝点不良の発生を抑制し、歩留まりの向上を図ることができる液晶表示装置、及び、当該液晶表示装置を有する電子機器を提供することを目的とする。 Therefore, an object of the present disclosure is to provide a liquid crystal display device capable of suppressing the occurrence of defective bright spots and improving the yield, and an electronic apparatus having the liquid crystal display device.
　上記の目的を達成するための本開示の液晶表示装置は、
　画素電極、画素電極に対向する対向電極、及び、画素電極と対向電極との間に封入された液晶層を有する液晶部、並びに、
　周期的に極性が変化する正極性の映像信号及び負極性の映像信号を別々に保持する２系統の保持容量を有し、２系統の保持容量の保持電圧を液晶部の画素電極に交互に印加する液晶駆動回路部、
　を含む画素が配置されて成り、
　対向電極には、正極性の映像信号及び負極性の映像信号に同期して極性が周期的に反転するコモン電圧が全画素共通に印加され、
　２系統の保持容量には、基準電位として異なる極性の電位が印加される、
　構成となっている。また、上記の目的を達成するための本開示の電子機器は、上記の構成の液晶表示装置を有する。 In order to achieve the above object, a liquid crystal display device of the present disclosure is provided.
A pixel electrode, a counter electrode facing the pixel electrode, a liquid crystal portion having a liquid crystal layer sealed between the pixel electrode and the counter electrode, and
It has two holding capacitors that hold the positive polarity video signal and the negative polarity video signal whose polarity changes periodically, and the holding voltage of the two holding capacitances is alternately applied to the pixel electrodes of the liquid crystal unit. LCD drive circuit
A pixel including
A common voltage whose polarity is periodically inverted in synchronization with the positive polarity video signal and the negative polarity video signal is applied to the common electrode in common for all pixels,
Potentials with different polarities are applied as reference potentials to the two storage capacitors.
It has a configuration. In addition, an electronic apparatus according to the present disclosure for achieving the above object includes the liquid crystal display device having the above structure.
　上記の構成の液晶表示装置あるいは当該液晶表示装置を有する電子機器において、保持容量の欠陥に伴って画素電位がリークしても、２系統の保持容量の基準電位を、異なる極性の電位に設定することで、画素電位がコモン電圧と同電位方向にリークするようにすることができる。そして、画素電位がコモン電圧と同電位方向にリークすることで、輝点となる画素不良を滅点化できる。これにより、保持容量の欠陥に伴う画素電位のリークに起因する画素欠陥が視認できなくなるため、輝点不良の発生を抑制できる。 In the liquid crystal display device having the above structure or an electronic apparatus having the liquid crystal display device, even if the pixel potential leaks due to a defect in the storage capacitor, the reference potentials of the two storage capacitors are set to potentials having different polarities. Thus, the pixel potential can leak in the same potential direction as the common voltage. The pixel potential leaks in the same potential direction as the common voltage, so that a pixel defect that becomes a bright spot can be darkened. As a result, pixel defects caused by pixel potential leakage due to storage capacitor defects cannot be visually recognized, and the occurrence of bright spot defects can be suppressed.
　本開示によれば、輝点となる画素不良を滅点化できることによって輝点不良の発生を抑制できるため、歩留まりの向上を図ることができる。尚、ここに記載された効果に必ずしも限定されるものではなく、本明細書中に記載されたいずれかの効果であってもよい。また、本明細書に記載された効果はあくまで例示であって、これに限定されるものではなく、また付加的な効果があってもよい。 According to the present disclosure, it is possible to suppress the occurrence of a bright spot defect by making a pixel defect that becomes a bright spot a dark spot, thereby improving the yield. The effects described here are not necessarily limited, and any of the effects described in the present specification may be used. Moreover, the effect described in this specification is an illustration to the last, Comprising: It is not limited to this, There may be an additional effect.
図１は、アクティブマトリクス型液晶表示装置のシステム構成の一例を示すシステム構成図である。FIG. 1 is a system configuration diagram illustrating an example of a system configuration of an active matrix liquid crystal display device. 図２Ａは、実施例１に係る画素回路の回路構成を示す回路図であり、図２Ｂは、実施例１に係る画素回路における映像信号Ｖsig及びコモン電圧Ｖcomの波形を示すタイミング波形図である。FIG. 2A is a circuit diagram illustrating a circuit configuration of the pixel circuit according to the first embodiment. FIG. 2B is a timing waveform diagram illustrating waveforms of the video signal V sig and the common voltage V com in the pixel circuit according to the first embodiment. is there. 図３Ａは、参考例に係る画素回路の回路構成を示す回路図であり、図３Ｂは、参考例に係る画素回路における映像信号Ｖsig及びコモン電圧Ｖcomの波形を示すタイミング波形図である。FIG. 3A is a circuit diagram illustrating a circuit configuration of a pixel circuit according to a reference example, and FIG. 3B is a timing waveform diagram illustrating waveforms of a video signal V sig and a common voltage V com in the pixel circuit according to the reference example. 図４Ａは、実施例２に係る画素回路の回路構成を示す回路図であり、図４Ｂは、実施例２に係る画素回路における映像信号Ｖsig及びコモン電圧Ｖcomの波形を示すタイミング波形図である。FIG. 4A is a circuit diagram illustrating a circuit configuration of the pixel circuit according to the second embodiment, and FIG. 4B is a timing waveform diagram illustrating waveforms of the video signal V sig and the common voltage V com in the pixel circuit according to the second embodiment. is there. 図５は、ＬＣＯＳデバイスの断面構造の一例を示す断面図である。FIG. 5 is a cross-sectional view showing an example of a cross-sectional structure of the LCOS device. 図６は、本開示の電子機器の具体例１に係る投射型表示装置（プロジェクタ）の基本的な構成を示す概略構成図である。FIG. 6 is a schematic configuration diagram illustrating a basic configuration of a projection display device (projector) according to a specific example 1 of the electronic apparatus of the present disclosure. 図７は、本開示の電子機器の具体例２に係るヘッドマウントディスプレイの一例を示す外観図である。FIG. 7 is an external view illustrating an example of a head mounted display according to a specific example 2 of the electronic apparatus of the present disclosure.
　以下、本開示の技術を実施するための形態（以下、「実施形態」と記述する）について図面を用いて詳細に説明する。本開示の技術は実施形態に限定されるものではなく、実施形態における種々の数値や材料などは例示である。以下の説明において、同一要素又は同一機能を有する要素には同一符号を用いることとし、重複する説明は省略する。尚、説明は以下の順序で行う。
１．本開示の液晶表示装置及び電子機器、全般に関する説明
２．液晶表示装置の基本的な構成
　２－１．システム構成
　　２－１－１．Ｖcom反転駆動
　　２－１－２．面一括駆動
３．実施形態に係る液晶表示装置
　３－１．実施例１（ＶＡ（Vertical Alignment）方式の液晶分子配列の場合の例）
　３－２．参考例　（２系統の保持容量に同じ極性の基準電位を印加する例）
　３－３．実施例２（ＴＮ（Twisted Nematic）方式の液晶分子配列の場合の例）
　３－４．実施例３（ＬＣＯＳ（Liquid Crystal on Silicon）デバイスの例）
　３－５．変形例
４．本開示の電子機器
　４－１．具体例１（投射型表示装置の例）
　４－２．具体例２（ヘッドマウントディスプレイの例）
５．本開示がとることができる構成 Hereinafter, modes for carrying out the technology of the present disclosure (hereinafter referred to as “embodiments”) will be described in detail with reference to the drawings. The technology of the present disclosure is not limited to the embodiment, and various numerical values and materials in the embodiment are examples. In the following description, the same reference numerals are used for the same elements or elements having the same function, and redundant description is omitted. The description will be given in the following order.
1. 1. General description of liquid crystal display device and electronic device of the present disclosure 2. Basic configuration of liquid crystal display device 2-1. System configuration 2-1-1. V com inversion drive 2-1-2. 2. Surface batch drive 3. Liquid crystal display device according to embodiment 3-1. Example 1 (example of VA (Vertical Alignment) type liquid crystal molecule alignment)
3-2. Reference example (Example of applying a reference potential of the same polarity to two storage capacitors)
3-3. Example 2 (example of TN (Twisted Nematic) type liquid crystal molecular arrangement)
3-4. Example 3 (Example of LCOS (Liquid Crystal on Silicon) device)
3-5. Modification 4 4. Electronic device of the present disclosure 4-1. Specific Example 1 (Example of Projection Display Device)
4-2. Example 2 (example of head mounted display)
5). Configurations that can be taken by the present disclosure
＜本開示の液晶表示装置及び電子機器、全般に関する説明＞
　本開示の液晶表示装置及び電子機器にあっては、液晶駆動回路部について、信号線を通して供給される正極性の映像信号及び負極性の映像信号を交互に２系統の保持容量に取り込む２系統の第１転送ゲート部、及び、２系統の保持容量の保持電圧を液晶部の画素電極に全画素一括で交互に印加する２系統の第２転送ゲート部を有する構成とすることができる。 <General Description of Liquid Crystal Display Device and Electronic Device of Present Disclosure>
In the liquid crystal display device and the electronic apparatus according to the present disclosure, for the liquid crystal drive circuit unit, two systems of taking in positive and negative video signals supplied through signal lines alternately into two storage capacitors. The first transfer gate unit and two systems of second transfer gate units that alternately apply the holding voltages of the two storage capacitors to the pixel electrodes of the liquid crystal unit collectively for all pixels can be employed.
　上述した好ましい構成を含む本開示の液晶表示装置及び電子機器にあっては、ＶＡ方式の液晶分子配列であるとき、正極性の映像信号を保持する保持容量の基準電位を接地電位に設定し、負極性の映像信号を保持する保持容量の基準電位を電源電位に設定する構成とすることができる。あるいは又、ＴＮ方式の液晶分子配列であるとき、正極性の映像信号を保持する保持容量の基準電位を電源電位に設定し、負極性の映像信号を保持する保持容量の基準電位を接地電位に設定する構成とすることができる。 In the liquid crystal display device and the electronic apparatus of the present disclosure including the preferable configuration described above, when the liquid crystal molecular arrangement is a VA method, the reference potential of the storage capacitor that holds the positive video signal is set to the ground potential, A configuration in which a reference potential of a storage capacitor that holds a negative video signal is set to a power supply potential can be employed. Alternatively, in the case of the TN liquid crystal molecular arrangement, the reference potential of the storage capacitor that holds the positive video signal is set to the power supply potential, and the reference potential of the storage capacitor that holds the negative video signal is set to the ground potential. It can be set as the structure to set.
　また、上述した好ましい構成を含む本開示の液晶表示装置及び電子機器にあっては、液晶層及び液晶駆動回路部について、半導体基板上に形成されている構成とすることができる。そして、２系統の保持容量については、トランジスタのゲート電極と半導体基板との間に形成されるゲート容量構造、又は、配線上に形成されるＭＩＭ（Metal-Insulator-Metal）構造から成る構成とすることができる。 Further, in the liquid crystal display device and the electronic apparatus of the present disclosure including the above-described preferable configuration, the liquid crystal layer and the liquid crystal driving circuit unit may be configured on the semiconductor substrate. The two storage capacitors have a structure including a gate capacitance structure formed between the gate electrode of the transistor and the semiconductor substrate, or an MIM (Metal-Insulator-Metal) structure formed on the wiring. be able to.
＜液晶表示装置の基本的な構成＞
　先ず、液晶表示装置の基本的な構成について、アクティブマトリクス型液晶表示装置を例に挙げて説明する。アクティブマトリクス型液晶表示装置は、画素の各々に対して独立した画素電極を配置し、これら画素電極の各々にスイッチング素子を接続して画素を選択的に駆動する、所謂、アクティブマトリクス駆動方式の表示装置である。 <Basic configuration of liquid crystal display device>
First, a basic configuration of a liquid crystal display device will be described by taking an active matrix liquid crystal display device as an example. An active matrix type liquid crystal display device is a so-called active matrix drive type display in which independent pixel electrodes are arranged for each pixel and a switching element is connected to each pixel electrode to selectively drive the pixel. Device.
　アクティブマトリクス型液晶表示装置では、第１の基板及び第２の基板の２枚の基板間に液晶を封入することによって液晶パネルが構成される。第１の基板は、スイッチング素子として例えばＴＦＴ（Thin Film Transistor；薄膜トランジスタ）が形成されたＴＦＴ基板である。第２の基板は、カラーフィルタや対向電極等が形成され、ＴＦＴ基板に対して対向して設けられる対向基板である。そして、液晶パネルにおいて、スイッチング素子によるスイッチング制御と映像信号に基づく電圧印加によって液晶の配向を制御し、光の透過率／反射率を変えることによって映像表示が行われる。 In the active matrix liquid crystal display device, a liquid crystal panel is formed by sealing liquid crystal between two substrates, a first substrate and a second substrate. The first substrate is a TFT substrate in which, for example, a TFT (Thin Film Transistor) is formed as a switching element. The second substrate is a counter substrate on which a color filter, a counter electrode, and the like are formed and provided to face the TFT substrate. In the liquid crystal panel, the liquid crystal orientation is controlled by switching control by a switching element and voltage application based on a video signal, and video display is performed by changing light transmittance / reflectance.
［システム構成］
　アクティブマトリクス型液晶表示装置のシステム構成の一例を図１に示す。図１に示すように、本例に係るアクティブマトリクス型液晶表示装置は、画素１０が行方向及び列方向に２次元配列されて成る画素アレイ部２０、及び、画素アレイ部２０の各画素１０を駆動する画素駆動部を有する。画素駆動部は、走査線駆動部３０及び信号線駆動部４０等から成る。 [System configuration]
An example of the system configuration of an active matrix liquid crystal display device is shown in FIG. As shown in FIG. 1, the active matrix liquid crystal display device according to this example includes a pixel array unit 20 in which pixels 10 are two-dimensionally arranged in a row direction and a column direction, and each pixel 10 in the pixel array unit 20. It has a pixel driver for driving. The pixel driving unit includes a scanning line driving unit 30, a signal line driving unit 40, and the like.
　画素アレイ部２０は、ｍ行ｎ列の画素配列となっている。このｍ行ｎ列の画素配列に対して、画素行毎に走査線５１1～５１m（以下、代表して「走査線５１」と記述する場合がある）が配線され、画素列毎に信号線５２1～５２n（以下、代表して「信号線５２」と記述する場合がある）が配線されている。走査線５１の一端は、走査線駆動部３０の対応する行の出力端に接続されている。信号線５２の一端は、信号線駆動部４０の対応する列の出力端に接続されている。 The pixel array unit 20 has a pixel array of m rows and n columns. Scan lines 51 1 to 51 m (hereinafter sometimes referred to as “scan line 51” in some cases) are wired for each pixel row to the pixel array of m rows and n columns, and a signal is provided for each pixel column. Lines 52 1 to 52 n (hereinafter, may be described as “signal line 52” as a representative) are wired. One end of the scanning line 51 is connected to the output end of the corresponding row of the scanning line driving unit 30. One end of the signal line 52 is connected to the output end of the corresponding column of the signal line driving unit 40.
（Ｖcom反転駆動）
　上記の構成のアクティブマトリクス型液晶表示装置では、交流駆動化されたアナログ映像信号を用いて、液晶に印加する電圧を一定の周期にて、基準電圧を中心に反転させる、所謂交流駆動が行われる。ここで、「交流駆動化されたアナログ映像信号」とは、基準電圧Ｖcom（以下、「コモン電圧Ｖcom」と呼ぶ）を中心に所定の周期にて極性が反転するアナログ映像信号のことを言う。コモン電圧Ｖcomは、液晶部の対向電極（共通電極）に印加される。 (V com inversion drive)
In the active matrix type liquid crystal display device having the above-described configuration, so-called AC driving is performed in which the voltage applied to the liquid crystal is inverted at a constant cycle around the reference voltage using an AC-driven analog video signal. . Here, the “AC drive analog video signal” refers to an analog video signal whose polarity is inverted at a predetermined cycle centered on a reference voltage V com (hereinafter referred to as “common voltage V com ”). To tell. The common voltage V com is applied to the counter electrode (common electrode) of the liquid crystal unit.
　交流駆動の場合、信号線駆動部４０から信号線５２1～５２nに対して、交流駆動化されたアナログ映像信号、即ち、正極性の映像信号と負極性の映像信号とが交互に供給されることになる。また、本例に係るアクティブマトリクス型液晶表示装置では、液晶部の対向電極に印加されるコモン電圧Ｖcomの極性を、正極性の映像信号及び負極性の映像信号に同期して周期的に反転する、所謂Ｖcom反転駆動が採用されている。 In the case of AC driving, the AC video driven analog video signal, that is, a positive video signal and a negative video signal are alternately supplied from the signal line driving unit 40 to the signal lines 52 1 to 52 n . Will be. In the active matrix type liquid crystal display device according to this example, the polarity of the common voltage V com applied to the counter electrode of the liquid crystal unit is periodically inverted in synchronization with the positive video signal and the negative video signal. In other words , so-called V com inversion driving is employed.
（面一括駆動）
　Ｖcom反転駆動の液晶表示装置において、画素アレイ部２０の各画素１０の駆動方式として、画面全体に対して画素アレイ部２０の各画素１０を同時に（一括して）駆動する面一括駆動が知られている。この面一括駆動によれば、画面の上部から下部にかけて行単位で順に駆動する線順次駆動による画像干渉を抑制することができる。 (Surface drive)
In a liquid crystal display device of V com inversion driving, as a driving method of each pixel 10 of the pixel array unit 20, surface collective driving that simultaneously (collectively) drives each pixel 10 of the pixel array unit 20 over the entire screen is known. It has been. According to this surface collective driving, it is possible to suppress image interference caused by line-sequential driving in which driving is sequentially performed in units of rows from the upper part to the lower part of the screen.
　面一括駆動を実現するために、液晶部を駆動する液晶駆動回路部内に保持容量を２系統設け、正極性の映像信号と負極性の映像信号とを２系統の保持容量に別々に保持し、これらの保持電圧を液晶部の画素電極に交互に印加する構成が採られている。これにより、画素電極に印加する電圧を、２系統の保持容量に１表示フレーム期間に亘ってそれぞれ保持しておくことができるため、Ｖcom反転駆動における交流駆動周波数を、垂直走査周波数によらず、任意に設定することができる。 In order to realize the surface collective driving, two holding capacitors are provided in the liquid crystal driving circuit unit for driving the liquid crystal unit, and a positive video signal and a negative video signal are separately held in the two holding capacitors, A configuration is employed in which these holding voltages are alternately applied to the pixel electrodes of the liquid crystal portion. As a result, the voltage applied to the pixel electrode can be held in two storage capacitors for one display frame period, so that the AC drive frequency in V com inversion drive is not dependent on the vertical scanning frequency. Can be set arbitrarily.
　一例として、６０Ｈｚ駆動の液晶表示装置を考えると、倍速駆動の場合には、１２０Ｈｚ駆動となる。但し、６０Ｈｚ駆動の場合、ＲＧＢ各色毎に面一括駆動を行うとすると、６０Ｈｚの１周期の期間にＲＧＢ各色の映像信号を出しきらなければならないため、例えば１８０Ｈｚ（＝６０Ｈｚ×３（ＲＧＢ３色分））での駆動となる。このように、２系統の保持容量を用いた面一括駆動を採用することにより、Ｖcom反転駆動における交流駆動周波数を、垂直走査周波数によらず、任意に設定することができる。 As an example, when a 60 Hz drive liquid crystal display device is considered, in the case of double speed drive, the drive is 120 Hz. However, in the case of 60 Hz driving, if surface collective driving is performed for each RGB color, it is necessary to output video signals of each RGB color in a period of one cycle of 60 Hz. )). As described above, by adopting the collective surface driving using the two storage capacitors, the AC driving frequency in the V com inversion driving can be arbitrarily set regardless of the vertical scanning frequency.
　但し、画素１０内に保持容量を２系統設けた場合、１系統設ける場合に比べて、保持容量が占める面積が大きくなる。そのため、保持容量の欠陥に伴って画素電位のリークが発生し、このリークに起因して発生する輝点不良／滅点不良が、保持容量が１系統の場合よりも多くなる。特に輝点不良の場合、１チップ内に輝点が２～３個でも存在すれば、そのチップは不良品扱いとなってしまうために、滅点不良の場合と違って歩留まりを下げる大きな要因となり得る。この点に鑑みてなされたのが、以下に説明する本開示の実施形態に係る液晶表示装置である。 However, when two storage capacitors are provided in the pixel 10, the area occupied by the storage capacitor is larger than when one storage capacitor is provided. For this reason, a leak of pixel potential occurs due to the defect of the storage capacitor, and the bright spot defect / dark spot defect caused by this leak becomes larger than that in the case of one storage capacitor. In particular, in the case of defective luminescent spots, if there are 2 or 3 luminescent spots in one chip, the chip will be treated as a defective product. obtain. In view of this point, a liquid crystal display device according to an embodiment of the present disclosure described below has been made.
＜実施形態に係る液晶表示装置＞
　本開示の実施形態に係る液晶表示装置は、保持容量を２系統有し、正極性の映像信号と負極性の映像信号とを２系統の保持容量に別々に保持し、これらの保持電圧を液晶部の画素電極に交互に印加する液晶駆動回路部において、２系統の保持容量に対して、基準電位として異なる極性の電位を印加する構成を採っている。 <Liquid Crystal Display Device According to Embodiment>
A liquid crystal display device according to an embodiment of the present disclosure has two holding capacitors, holds a positive-polarity video signal and a negative-polarity video signal separately in two holding capacitors, and stores these holding voltages in a liquid crystal In the liquid crystal driving circuit unit that alternately applies to the pixel electrodes of the unit, a configuration is adopted in which potentials of different polarities are applied as reference potentials to the two storage capacitors.
　ここで、正極性の映像信号及び負極性の映像信号に同期して極性が周期的に反転するコモン電圧Ｖcomが、全画素共通に対向電極に印加されるＶcom反転駆動の液晶表示装置において、保持容量の欠陥に伴って画素電位がリークした場合を考える。この保持容量の欠陥に伴う画素電位のリークは、面一括駆動を実現するために、画素１０内に保持容量を２系統設けた場合に、１系統設ける場合に比べて、保持容量が占める面積が大きくなることによって生じ易い。 Here, in a V com inversion driving liquid crystal display device in which a common voltage V com whose polarity is periodically inverted in synchronization with a positive polarity video signal and a negative polarity video signal is applied to the common electrode in common for all pixels. Consider a case where the pixel potential leaks due to a defect in the storage capacitor. The leakage of the pixel potential due to the defect of the storage capacitor is such that the area occupied by the storage capacitor is larger when two storage capacitors are provided in the pixel 10 than when one system is provided in order to realize the surface collective driving. It tends to be caused by becoming large.
［例えば、ＶＡ液晶の場合］
　２系統の保持容量の基準電位を、異なる極性の電位に設定することで、保持容量の欠陥に伴って画素電位がリークしたとしても、画素電位がコモン電圧と同電位方向にリークするようにすることができる。そして、画素電位がコモン電圧Ｖcomと同電位方向にリークすることによって、輝点となる画素不良を滅点化できる。輝点の滅点化により、保持容量の欠陥に伴う画素電位のリークに起因する画素欠陥が視認できなくなるため、輝点不良の発生を抑制し、歩留まりの向上を図ることができる。また、画素電位のリークに起因する輝点不良の発生を抑制できることで、保持容量が占める面積の増大を図ることができる。 [For example, in the case of VA liquid crystal]
By setting the reference potentials of the two storage capacitors to potentials of different polarities, the pixel potential leaks in the same potential direction as the common voltage even if the pixel potential leaks due to a defect in the storage capacitor. be able to. Then, when the pixel potential leaks in the same potential direction as the common voltage V com , a pixel defect that becomes a bright spot can be darkened. With the dark spots becoming dark, pixel defects due to pixel potential leaks associated with defects in the storage capacitor cannot be visually recognized, so that the occurrence of bright spot defects can be suppressed and the yield can be improved. In addition, since the occurrence of defective bright spots due to pixel potential leakage can be suppressed, the area occupied by the storage capacitor can be increased.
　以下に、２系統の保持容量の基準電位を、異なる極性の電位に設定するための具体的な実施例について説明する。 Hereinafter, a specific embodiment for setting the reference potentials of the two storage capacitors to potentials of different polarities will be described.
［実施例１］
　実施例１は、ＶＡ（Vertical Alignment）方式の液晶分子配列の場合の例である。ＶＡ方式は、液晶に電圧がかかっていないときに、透過率あるいは反射率が最小となり、黒画面になるノーマリーブラックである。実施例１に係る画素回路の回路構成を図２Ａに示し、実施例１に係る画素回路における映像信号Ｖsig及びコモン電圧Ｖcomの波形を図２Ｂ示す。図２Ｂのタイミング波形図は、１００％ブラックの状態を表している。 [Example 1]
Example 1 is an example in the case of a VA (Vertical Alignment) type liquid crystal molecule alignment. The VA system is normally black, which has a minimum transmittance or reflectance when a voltage is not applied to the liquid crystal, resulting in a black screen. FIG. 2A shows a circuit configuration of the pixel circuit according to the first embodiment, and FIG. 2B shows waveforms of the video signal V sig and the common voltage V com in the pixel circuit according to the first embodiment. The timing waveform diagram of FIG. 2B represents the state of 100% black.
　液晶部（液晶素子）６０は、画素電極６１、画素電極６１に対向する対向電極（共通電極）６２、及び、画素電極６１と対向電極６２との間に封入された液晶層６３を有する。対向電極６２には、映像信号Ｖsigの極性反転に同期して周期的に極性が反転するコモン電圧Ｖcomが、全画素共通に印加される。 The liquid crystal unit (liquid crystal element) 60 includes a pixel electrode 61, a counter electrode (common electrode) 62 facing the pixel electrode 61, and a liquid crystal layer 63 sealed between the pixel electrode 61 and the counter electrode 62. A common voltage V com whose polarity is periodically inverted in synchronization with the polarity inversion of the video signal V sig is applied to the counter electrode 62 in common for all the pixels.
　液晶部６０を駆動する液晶駆動回路部７０には、信号線５２を通して極性が周期的に反転する映像信号Ｖsigが供給される。液晶駆動回路部７０は、正極性の映像信号Ｖsigを処理する第１相（所謂、Ｐ（Positive）相）、及び、負極性の映像信号Ｖsigを処理する第２相（所謂、Ｎ（Negative）相）の２系統の回路、即ちＰ相の回路及びＮ相の回路から成る。 A video signal V sig whose polarity is periodically inverted is supplied to the liquid crystal drive circuit unit 70 that drives the liquid crystal unit 60 through the signal line 52. Liquid crystal drive circuit 70, a first phase to process the positive polarity of the video signal V sig (so-called, P (Positive) phase), and a second phase of processing a video signal of negative polarity V sig (so-called, N ( Negative) phase), that is, a P-phase circuit and an N-phase circuit.
　Ｐ相の回路は、第１転送ゲート部７１_p、保持容量７２_p、及び、第２転送ゲート部７３_pを有する。第１転送ゲート部７１_pの入力端は、信号線５２に接続されている。第１転送ゲート部７１_pの出力端には、保持容量７２_pの一端及び第２転送ゲート部７３_pの入力端が接続されている。保持容量７２_pの他端には、基準電位として接地電位ＧＮＤが印加されている。第２転送ゲート部７３_pの出力端には、液晶部６０の画素電極６１が接続されている。 The P-phase circuit includes a first transfer gate portion 71_p , a storage capacitor 72_p , and a second transfer gate portion 73_p . The input end of the first transfer gate portion 71_p is connected to the signal line 52. One end of the storage capacitor 72_p and the input end of the second transfer gate portion 73_p are connected to the output end of the first transfer gate portion 71_p . The ground potential GND is applied as a reference potential to the other end of the storage capacitor 72_p . The pixel electrode 61 of the liquid crystal unit 60 is connected to the output terminal of the second transfer gate unit 73_p .
　第１転送ゲート部７１_p及び第２転送ゲート部７３_pは、例えば、Ｐチャネル型ＭＯＳトランジスタとＮチャネル型ＭＯＳトランジスタとが並列接続されて成るＣＭＯＳトランスファゲートによって構成されている。但し、ＣＭＯＳトランスファゲートに限定されるものではなく、Ｐチャネル型ＭＯＳトランジスタ単独又はＮチャネル型ＭＯＳトランジスタ単独で第１転送ゲート部７１_p及び第２転送ゲート部７３_pを構成することも可能である。 The first transfer gate portion 71_p and the second transfer gate portion 73_p are configured by, for example, a CMOS transfer gate in which a P-channel MOS transistor and an N-channel MOS transistor are connected in parallel. However, the present invention is not limited to the CMOS transfer gate, and the first transfer gate portion 71_p and the second transfer gate portion 73_p can be configured by a single P-channel MOS transistor or a single N-channel MOS transistor. .
　Ｎ相の回路も、基本的に、Ｐ相の回路と同様の回路構成となっている。すなわち、Ｎ相の回路は、第１転送ゲート部７１_n、保持容量７２_n、及び、第２転送ゲート部７３_nを有する。第１転送ゲート部７１_nの入力端は、信号線５２に接続されている。第１転送ゲート部７１_nの出力端には、保持容量７２_nの一端及び第２転送ゲート部７３_nの入力端が接続されている。保持容量７２_nの他端には、基準電位として電源電位Ｖddが印加されている。第２転送ゲート部７３_nの出力端には、液晶部６０の画素電極６１が接続されている。 The N-phase circuit basically has the same circuit configuration as the P-phase circuit. That is, the N-phase circuit includes a first transfer gate portion 71_n , a storage capacitor 72_n , and a second transfer gate portion 73_n . The input end of the first transfer gate portion 71_n is connected to the signal line 52. One end of the storage capacitor 72_n and the input end of the second transfer gate portion 73_n are connected to the output end of the first transfer gate portion 71_n . A power supply potential Vdd is applied as a reference potential to the other end of the storage capacitor 72_n . The pixel electrode 61 of the liquid crystal unit 60 is connected to the output terminal of the second transfer gate unit 73_n .
　第１転送ゲート部７１_n及び第２転送ゲート部７３_nは、例えば、Ｐチャネル型ＭＯＳトランジスタとＮチャネル型ＭＯＳトランジスタとが並列接続されて成るＣＭＯＳトランスファゲートによって構成されている。但し、ＣＭＯＳトランスファゲートに限定されるものではなく、Ｐチャネル型ＭＯＳトランジスタ単独又はＮチャネル型ＭＯＳトランジスタ単独で第１転送ゲート部７１_n及び第２転送ゲート部７３_nを構成することも可能である。 The first transfer gate portion 71_n and the second transfer gate portion 73_n are configured by, for example, CMOS transfer gates in which a P-channel MOS transistor and an N-channel MOS transistor are connected in parallel. However, the present invention is not limited to the CMOS transfer gate, and the first transfer gate portion 71_n and the second transfer gate portion 73_n can be configured by a single P-channel MOS transistor or a single N-channel MOS transistor. .
　上述したように、実施例１に係る画素回路では、Ｖcom反転駆動のＶＡ方式のアクティブマトリクス型液晶表示装置において、Ｐ相の保持容量７２_pの基準電位を接地電位ＧＮＤに設定し、Ｎ相の保持容量７２_nの基準電位を電源電位Ｖddに設定している。これにより、保持容量７２_p，７２_nの欠陥に伴う画素電位のリーク発生時に、輝点の発生を抑制することができる。 As described above, in the pixel circuit according to the first embodiment, in the VA active matrix liquid crystal display device of V com inversion driving, the reference potential of the P-phase storage capacitor 72_p is set to the ground potential GND, and the N-phase The reference potential of the storage capacitor 72_n is set to the power supply potential Vdd . Thereby, it is possible to suppress the occurrence of bright spots when pixel potential leakage occurs due to defects in the storage capacitors 72_p and 72_n .
　具体的には、図２Ｂに示すように、Ｎ相では、映像信号Ｖsigが最大レベル（Ｖdd）で画面が黒表示のときに、保持容量７２_nの基準電位が電源電位Ｖddであることで、画素電位がコモン電圧Ｖcomと同電位方向にリークする。コモン電圧Ｖcomと同電位方向に画素電位がリークすることで、保持容量７２_nの基準電位が接地電位ＧＮＤである場合に輝点となる画素不良を滅点化できる。そして、輝点の滅点化により、画素電位のリークに起因する画素欠陥が視認できなくなるため、輝点不良の発生を抑制でき、チップとしての不良発生率を下げることができる。 Specifically, as shown in FIG. 2B, in the N phase, when the video signal V sig is at the maximum level (V dd ) and the screen is displayed in black, the reference potential of the storage capacitor 72 —n is the power supply potential V dd . As a result, the pixel potential leaks in the same potential direction as the common voltage Vcom . Since the pixel potential leaks in the same potential direction as the common voltage V com , a pixel defect that becomes a bright spot when the reference potential of the storage capacitor 72 — n is the ground potential GND can be darkened. Further, since the pixel defect due to the leak of the pixel potential can no longer be visually recognized due to the disappearance of the bright spot, the occurrence of the bright spot defect can be suppressed and the defect occurrence rate as a chip can be reduced.
　因みに、２系統の保持容量７２_p，７２_nに対して、基準電位として同じ極性の電位を印加する場合について、以下に参考例として説明する。 Incidentally, a case where a potential having the same polarity as the reference potential is applied to the two storage capacitors 72_p and 72_n will be described below as a reference example.
（参考例）
　参考例に係る画素回路の回路構成を図３Ａに示し、参考例に係る画素回路における映像信号Ｖsig及びコモン電圧Ｖcomの波形を図３Ｂ示す。ここでは、ＶＡ方式の液晶分子配列の場合を例に挙げている。また、図３Ｂのタイミング波形図は、１００％ブラックの状態を表している。 (Reference example)
FIG. 3A shows a circuit configuration of a pixel circuit according to the reference example, and FIG. 3B shows waveforms of the video signal V sig and the common voltage V com in the pixel circuit according to the reference example. Here, a case of a VA liquid crystal molecular arrangement is taken as an example. In addition, the timing waveform diagram of FIG. 3B represents a state of 100% black.
　参考例に係る画素回路では、Ｖcom反転駆動のＶＡ方式のアクティブマトリクス型液晶表示装置において、Ｐ相の保持容量７２_p及びＮ相の保持容量７２_nの基準電位を共に接地電位ＧＮＤに設定している。この場合、図３Ｂに示すように、Ｎ相では、映像信号Ｖsigが最大レベル（Ｖdd）で画面がブラック表示のときに、保持容量７２_nの基準電位が接地電位ＧＮＤであることで、保持容量７２_p，７２_nの欠陥に伴うリーク発生時に、画素電位が接地電位ＧＮＤにリークし、輝点不良が発生する。先述したように、輝点不良の場合、１チップ内に輝点が２～３個でも存在すれば、そのチップは不良品扱いとなってしまうために、滅点不良の場合と違って歩留まりを下げる大きな要因となり得る。 In the pixel circuit according to the reference example, in the VA type active matrix liquid crystal display device of V com inversion driving, the reference potentials of the P-phase storage capacitor 72_p and the N-phase storage capacitor 72_n are both set to the ground potential GND. ing. In this case, as shown in FIG. 3B, in the N phase, when the video signal V sig is at the maximum level (V dd ) and the screen is displayed in black, the reference potential of the storage capacitor 72 —n is the ground potential GND. When a leak occurs due to defects in the storage capacitors 72_p and 72_n , the pixel potential leaks to the ground potential GND, and a bright spot defect occurs. As described above, in the case of a luminescent spot failure, if there are 2 or 3 luminescent spots in one chip, the chip will be treated as a defective product. It can be a big factor to lower.
［実施例２］
　実施例２は、ＴＮ（Twisted Nematic）方式の液晶分子配列の場合の例である。ＴＮ方式は、液晶に電圧がかかっていないときに、透過率あるいは反射率が最大となり、白画面になるノーマリーホワイトである。実施例２に係る画素回路の回路構成を図４Ａに示し、実施例２に係る画素回路における映像信号Ｖsig及びコモン電圧Ｖcomの波形を図４Ｂ示す。図４Ｂのタイミング波形図は、１００％ブラックの状態を表している。 [Example 2]
Example 2 is an example in the case of a TN (Twisted Nematic) type liquid crystal molecular arrangement. The TN method is normally white, in which the transmittance or reflectance is maximized when a voltage is not applied to the liquid crystal and a white screen is obtained. FIG. 4A shows a circuit configuration of the pixel circuit according to the second embodiment, and FIG. 4B shows waveforms of the video signal V sig and the common voltage V com in the pixel circuit according to the second embodiment. The timing waveform diagram of FIG. 4B represents a state of 100% black.
　実施例２に係る画素回路では、Ｖcom反転駆動のＴＮ方式の液晶表示装置において、Ｐ相の保持容量７２_pの基準電位を電源電位Ｖddに設定し、Ｎ相の保持容量７２_nの基準電位を接地電位ＧＮＤに設定している。これにより、図４Ｂに示すように、Ｐ相では、映像信号Ｖsigが最大レベル（Ｖdd）で画面が黒表示のときに、保持容量７２_pの基準電位が電源電位Ｖddであることで、画素電位がコモン電圧Ｖcomと同電位方向にリークする。コモン電圧Ｖcomと同電位方向に画素電位がリークすることで、保持容量７２_pの基準電位が接地電位ＧＮＤである場合に輝点となる画素不良を滅点化できる。そして、輝点の滅点化により、画素電位のリークに起因する画素欠陥が視認できなくなるため、輝点不良の発生を抑制でき、チップとしての不良発生率を下げることができる。 In the pixel circuit according to Embodiment 2, V in the liquid crystal display device of TN type of com inversion driving, to set the reference potential of the storage capacitor 72 _p the P phase to the power supply potential V dd, the reference of the storage capacitor 72 _n N-phase The potential is set to the ground potential GND. As a result, as shown in FIG. 4B, in the P phase, when the video signal V sig is at the maximum level (V dd ) and the screen is black, the reference potential of the storage capacitor 72 —p is the power supply potential V dd. The pixel potential leaks in the same potential direction as the common voltage Vcom . Since the pixel potential leaks in the same potential direction as the common voltage Vcom , a pixel defect that becomes a bright spot when the reference potential of the storage capacitor 72_p is the ground potential GND can be darkened. Further, since the pixel defect due to the leak of the pixel potential can no longer be visually recognized due to the disappearance of the bright spot, the occurrence of the bright spot defect can be suppressed and the defect occurrence rate as a chip can be reduced.
［実施例３］
　本実施形態に係る液晶表示装置については、半導体基板と、当該半導体基板と対向する透明基板との間に液晶層を挟み込んで成るデバイス、例えば、シリコン基板と透明基板との間に液晶層を挟み込んで成るＬＣＯＳ（Liquid Crystal on Silicon）デバイスとすることができる。 [Example 3]
In the liquid crystal display device according to the present embodiment, a device in which a liquid crystal layer is sandwiched between a semiconductor substrate and a transparent substrate facing the semiconductor substrate, for example, a liquid crystal layer is sandwiched between a silicon substrate and a transparent substrate. An LCOS (Liquid Crystal on Silicon) device comprising:
　ＬＣＯＳデバイスの断面構造の一例を図５に示す。ＬＣＯＳデバイスは、シリコン基板８１に液晶駆動回路部７０及び画素電極６１を形成し、対向電極６２を内面に有するガラス基板等の透明基板８２で液晶層６３を挟み込んだ構造となっている。画素電極６１は、アルミニウム等から成る反射電極である。対向電極６２は、ＩＯＴ（Indium Tin Oxide）等から成る透明電極である。画素電極６１と液晶層６３との間には配向層６４が介在し、液晶層６３と対向電極６２との間には配向層６５が介在している。そして、透明基板である対向電極６２及び液晶層６３を通過した光は、反射電極である画素電極６１にて反射される。 An example of a cross-sectional structure of the LCOS device is shown in FIG. The LCOS device has a structure in which a liquid crystal driving circuit unit 70 and a pixel electrode 61 are formed on a silicon substrate 81, and a liquid crystal layer 63 is sandwiched between transparent substrates 82 such as a glass substrate having an opposing electrode 62 on the inner surface. The pixel electrode 61 is a reflective electrode made of aluminum or the like. The counter electrode 62 is a transparent electrode made of IOT (Indium Tin Oxide) or the like. An alignment layer 64 is interposed between the pixel electrode 61 and the liquid crystal layer 63, and an alignment layer 65 is interposed between the liquid crystal layer 63 and the counter electrode 62. The light that has passed through the counter electrode 62 and the liquid crystal layer 63 that are transparent substrates is reflected by the pixel electrode 61 that is a reflective electrode.
　ＬＣＯＳデバイスにおいて、保持容量７２_p，７２_nを、第１転送ゲート部７１_p，７１_n又は第２転送ゲート部７３_p，７３_nを構成するトランジスタのゲート電極とシリコン基板との間に形成されるゲート容量構造、又は、配線上に形成されるＭＩＭ（Metal-Insulator-Metal）構造にて形成することができる。特に、画素ピッチの縮小化にあたっては、ＭＩＭ構造にて保持容量７２_p，７２_nを形成することが好ましい。 In the LCOS device, the storage capacitors 72_p and 72_n are formed between the gate electrodes of the transistors constituting the first transfer gate portions 71_p and 71_n or the second transfer gate portions 73_p and 73_n and the silicon substrate. It can be formed by a gate capacitance structure or an MIM (Metal-Insulator-Metal) structure formed on the wiring. In particular, when the pixel pitch is reduced, it is preferable to form the storage capacitors 72_p and 72_n with the MIM structure.
　但し、ＭＩＭ構造は、配線上に絶縁膜を形成することになるために、シリコン基板上に絶縁膜を形成するゲート容量構造に比べて、ＭＩＭ欠陥に起因する容量欠陥の要因が増加し、その結果、輝点欠陥が増える懸念がある。これに対し、実施例１に係る画素回路あるいは実施例２に係る画素回路を用いることにより、輝点不良の発生を抑制でき、チップとしての不良発生率を下げることができるため、ＭＩＭ構造を積極的に利用可能となり、その結果、画素ピッチの縮小化に寄与できることになる。 However, in the MIM structure, since an insulating film is formed on the wiring, the cause of the capacity defect due to the MIM defect is increased as compared with the gate capacitance structure in which the insulating film is formed on the silicon substrate. As a result, there is a concern that bright spot defects increase. On the other hand, by using the pixel circuit according to the first embodiment or the pixel circuit according to the second embodiment, the occurrence of bright spot defects can be suppressed and the defect occurrence rate as a chip can be reduced. As a result, the pixel pitch can be reduced.
［変形例］
　実施例１，２に係る画素回路では、２系統の保持容量７２_p，７２_nに印加する基準電位として、接地電位ＧＮＤ／電源電位Ｖddを用いる場合を例示したが、接地電位ＧＮＤ／電源電位Ｖddに限られるものではない。すなわち、２系統の保持容量７２_p，７２_nに印加する基準電位として、例えば薄いクレーレベルを用いることも可能である。 [Modification]
In the pixel circuits according to the first and second embodiments, the case where the ground potential GND / power supply potential Vdd is used as the reference potential applied to the two storage capacitors 72_p and 72_n is exemplified. However, the ground potential GND / power supply potential is used. It is not limited to Vdd . That is, for example, a thin clay level can be used as the reference potential applied to the two storage capacitors 72_p and 72_n .
＜本開示の電子機器＞
　以上説明した本開示の液晶表示装置は、電子機器に入力された映像信号、若しくは、電子機器内で生成した映像信号を、画像若しくは映像として表示するあらゆる分野の電子機器の表示部（表示装置）として用いることができる。一例として、投射型表示装置（プロジェクタ）、ヘッドマウントディスプレイ、デジタルスチルカメラ、ビデオカメラ、携帯電話機等の携帯端末装置、ノート型パーソナルコンピュータ、テレビジョンセットなどの表示部として用いることができる。 <Electronic device of the present disclosure>
The liquid crystal display device of the present disclosure described above is a display unit (display device) of an electronic device in any field that displays a video signal input to the electronic device or a video signal generated in the electronic device as an image or a video. Can be used as As an example, it can be used as a display unit of a projection display device (projector), a head-mounted display, a digital still camera, a video camera, a mobile terminal device such as a mobile phone, a notebook personal computer, a television set, or the like.
　本開示の液晶表示装置は、封止された構成のモジュール形状のものをも含む。一例として、画素アレイ部に透明なガラス等の対向部が貼り付けられて形成された表示モジュールが該当する。尚、表示モジュールには、外部から画素アレイ部への信号等を入出力するための回路部やフレキシブルプリントサーキット（ＦＰＣ）などが設けられた構成であってもよい。 The liquid crystal display device of the present disclosure includes a module-shaped one with a sealed configuration. As an example, a display module formed by attaching a facing portion such as transparent glass to the pixel array portion is applicable. Note that the display module may have a configuration in which a circuit unit for inputting / outputting signals from the outside to the pixel array unit, a flexible printed circuit (FPC), and the like are provided.
　本開示の液晶表示装置、即ち、２系統の保持容量を用いて面一括駆動を実現するＶcom反転駆動の液晶表示装置は、輝点不良の発生を抑制し、歩留まりの向上を図ることができる。従って、電子機器の表示部（液晶パネル）として、本開示の液晶表示装置を用いることにより、電子機器としての不良発生率を下げることができる。 The liquid crystal display device according to the present disclosure, that is, the V com inversion driving liquid crystal display device that realizes surface collective driving using two storage capacitors can suppress the occurrence of bright spot defects and improve the yield. . Therefore, by using the liquid crystal display device of the present disclosure as the display unit (liquid crystal panel) of the electronic device, it is possible to reduce the defect occurrence rate as the electronic device.
　以下に、本開示の液晶表示装置を用いる電子機器の具体例として、投射型表示装置（プロジェクタ）及びヘッドマウントディスプレイを例示する。但し、ここで例示する具体例は一例に過ぎず、これに限られるものではない。 Hereinafter, as a specific example of an electronic apparatus using the liquid crystal display device of the present disclosure, a projection display device (projector) and a head mounted display will be exemplified. However, the specific example illustrated here is only an example, and is not limited thereto.
［具体例１］
　図６は、本開示の電子機器の具体例１に係る投射型表示装置（プロジェクタ）の基本的な構成を示す概略構成図である。ここでは、投射型表示装置として、単板式投射型表示装置を例に挙げている。 [Specific Example 1]
FIG. 6 is a schematic configuration diagram illustrating a basic configuration of a projection display device (projector) according to a specific example 1 of the electronic apparatus of the present disclosure. Here, a single-plate projection display device is taken as an example of the projection display device.
　本具体例１に係る単板式投射型表示装置（プロジェクタ）１００は、光源１０１、液晶パネル（表示部）１０２、ビームスプリッタ１０３、及び、投射レンズ１０４を備える構成となっている。光源１０１は、カラー画像表示に必要とされる、例えば、Ｒ（赤），Ｇ（緑），Ｂ（青）の各色の光を所定の周期で繰り返して出射する。光源１０１から出射された各色の光は、ビームスプリッタ１０３を通して液晶パネル１０２に照射される。 The single-plate projection display device (projector) 100 according to the first specific example includes a light source 101, a liquid crystal panel (display unit) 102, a beam splitter 103, and a projection lens 104. The light source 101 repeatedly emits light of each color of R (red), G (green), and B (blue), which is necessary for color image display, at a predetermined cycle. The light of each color emitted from the light source 101 is applied to the liquid crystal panel 102 through the beam splitter 103.
　液晶パネル１０２は、例えばＬＣＯＳデバイスから成り、Ｒ，Ｇ，Ｂの３つの副画素によって、カラー画像を形成する単位となる１つの画素を構成している。この液晶パネル１０２として、本開示の液晶表示装置、即ち、２系統の保持容量を用いて面一括駆動を実現するＶcom反転駆動の液晶表示装置を用いることができる。液晶パネル１０２からは、Ｒの画像光、Ｇの画像光、及び、Ｂの画像光が時間差を持って順に出射され、ビームスプリッタ１０３を通して投射レンズ１０４に導かれる。投射レンズ１０４は、液晶パネル１０２から順に出射されるＲの画像光、Ｇの画像光、及び、Ｂの画像光をスクリーン１１０に向けて投射する。 The liquid crystal panel 102 is composed of, for example, an LCOS device, and one pixel serving as a unit for forming a color image is configured by three subpixels R, G, and B. As the liquid crystal panel 102, a liquid crystal display device according to the present disclosure, that is, a V com inversion driving liquid crystal display device that realizes surface collective driving using two storage capacitors can be used. From the liquid crystal panel 102, R image light, G image light, and B image light are sequentially emitted with a time difference, and are guided to the projection lens 104 through the beam splitter 103. The projection lens 104 projects R image light, G image light, and B image light sequentially emitted from the liquid crystal panel 102 toward the screen 110.
　上述したように、２系統の保持容量を用いて面一括駆動を実現するＶcom反転駆動の液晶表示装置を液晶パネル１０２として用いた単板式投射型表示装置１００では、液晶パネル１０２から順に出射されるＲの画像光、Ｇの画像光、及び、Ｂの画像光が時間差でスクリーン１１０上に投影される。そして、スクリーン１１０上に時間差を持って投影されるＲの画像、Ｇの画像、及び、Ｂの画像が、人間の目が合成されてカラー画像として認知されることになる。 As described above, in the single-plate projection display device 100 using the V com inversion driving liquid crystal display device that realizes the collective surface driving using the two storage capacitors as the liquid crystal panel 102, the liquid crystal panel 102 sequentially emits light. R image light, G image light, and B image light are projected onto the screen 110 with a time difference. Then, the R image, the G image, and the B image projected on the screen 110 with a time difference are combined and recognized as a color image by human eyes.
　尚、ここでは、単板式投射型表示装置において、液晶パネルとして本開示の液晶表示装置を用いる場合を例に挙げて説明したが、単板式投射型表示装置への適用に限られるものではなく、３板式投射型表示装置において、液晶パネルとして本開示の液晶表示装置を用いることができる。３板式投射型表示装置に適用する場合、３つの液晶パネルとして、Ｒ，Ｇ，Ｂの各色に対応した液晶表示装置を用い、３板の画像を合成することによってカラー表示を実現することになる。また、ここでは、液晶パネル１０２として、反射式のデバイスを用いたが、透過型のデバイスを用いることも可能である。 Here, in the single-plate projection display device, the case where the liquid crystal display device of the present disclosure is used as a liquid crystal panel has been described as an example, but the present invention is not limited to application to a single-plate projection display device, In the three-plate projection display device, the liquid crystal display device of the present disclosure can be used as the liquid crystal panel. When applied to a three-plate projection display device, a liquid crystal display device corresponding to each color of R, G, and B is used as the three liquid crystal panels, and color display is realized by synthesizing the images of the three plates. . Here, although a reflective device is used as the liquid crystal panel 102, a transmissive device may be used.
［具体例２］
　図７は、本開示の電子機器の具体例２に係るヘッドマウントディスプレイの一例を示す外観図である。 [Specific Example 2]
FIG. 7 is an external view illustrating an example of a head mounted display according to a specific example 2 of the electronic apparatus of the present disclosure.
　本具体例２に係るヘッドマウントディスプレイ２００は、本体部２０１、アーム部２０２及び鏡筒２０３を有する透過式ヘッドマウントディスプレイ構成となっている。本体部２０１は、アーム部２０２及び眼鏡２１０と接続されている。具体的には、本体部２０１の長辺方向の端部はアーム部２０２に取り付けられている。また、本体部２０１の側面の一方側は、接続部材（図示せず）を介して眼鏡２１０に連結されている。尚、本体部２０１は、直接的に人体の頭部に装着されてもよい。 The head mounted display 200 according to the second specific example has a transmissive head mounted display configuration including a main body portion 201, an arm portion 202, and a lens barrel 203. The main body unit 201 is connected to the arm unit 202 and the glasses 210. Specifically, the end of the main body 201 in the long side direction is attached to the arm 202. One side of the side surface of the main body 201 is connected to the glasses 210 via a connection member (not shown). The main body 201 may be directly attached to the head of a human body.
　本体部２０１は、ヘッドマウントディスプレイ２００の動作を制御するための制御基板や表示部を内蔵している。アーム部２０２は、本体部２０１と鏡筒２０３とを連結させることで、本体部２０１に対して鏡筒２０３を支える。具体的には、アーム部２０２は、本体部２０１の端部及び鏡筒２０３の端部と結合されることで、本体部２０１に対して鏡筒２０３を固定する。また、アーム部２０２は、本体部２０１から鏡筒２０３に提供される画像に係るデータを通信するための信号線を内蔵している。 The main body unit 201 incorporates a control board and a display unit for controlling the operation of the head mounted display 200. The arm unit 202 supports the lens barrel 203 with respect to the main body 201 by connecting the main body 201 and the lens barrel 203. Specifically, the arm portion 202 is coupled to the end portion of the main body portion 201 and the end portion of the lens barrel 203, thereby fixing the lens barrel 203 to the main body portion 201. The arm unit 202 includes a signal line for communicating data related to an image provided from the main body unit 201 to the lens barrel 203.
　鏡筒２０３は、本体部２０１からアーム部２０２を経由して提供される画像光を、眼鏡２１０のレンズ２１１を透して、ヘッドマウントディスプレイ２００を装着するユーザの目に向かって投射する。このヘッドマウントディスプレイ２００において、本体部２０１に内蔵される表示部として、本開示の液晶表示装置、即ち、２系統の保持容量を用いて面一括駆動を実現するＶcom反転駆動の液晶表示装置を用いることができる。 The lens barrel 203 projects image light provided from the main body unit 201 via the arm unit 202 through the lens 211 of the glasses 210 toward the eyes of the user wearing the head mounted display 200. In the head-mounted display 200, the liquid crystal display device of the present disclosure, that is, a V com inversion driving liquid crystal display device that realizes surface collective driving using two storage capacitors as a display unit incorporated in the main body unit 201. Can be used.
＜本開示がとることができる構成＞
　尚、本開示は、以下のような構成をとることもできる。
≪Ａ．液晶表示装置≫
［Ａ－１］画素電極、画素電極に対向する対向電極、及び、画素電極と対向電極との間に封入された液晶層を有する液晶部、並びに、
　周期的に極性が変化する正極性の映像信号及び負極性の映像信号を別々に保持する２系統の保持容量を有し、２系統の保持容量の保持電圧を液晶部の画素電極に交互に印加する液晶駆動回路部、
　を含む画素が配置されて成り、
　対向電極には、正極性の映像信号及び負極性の映像信号に同期して極性が周期的に反転するコモン電圧が全画素共通に印加され、
　２系統の保持容量には、基準電位として異なる極性の電位が印加される、
　液晶表示装置。
［Ａ－２］液晶駆動回路部は、
　信号線を通して供給される正極性の映像信号及び負極性の映像信号を交互に２系統の保持容量に取り込む２系統の第１転送ゲート部、及び、
　２系統の保持容量の保持電圧を液晶部の画素電極に全画素一括で交互に印加する２系統の第２転送ゲート部を有する、
　Ａ－１に記載の液晶表示装置。
［Ａ－３］ＶＡ方式の液晶分子配列であるとき、正極性の映像信号を保持する保持容量の基準電位を接地電位に設定し、負極性の映像信号を保持する保持容量の基準電位を電源電位に設定する、
　Ａ－１又はＡ－２に記載の液晶表示装置。
［Ａ－４］ＴＮ方式の液晶分子配列であるとき、正極性の映像信号を保持する保持容量の基準電位を電源電位に設定し、負極性の映像信号を保持する保持容量の基準電位を接地電位に設定する、
　Ａ－１又はＡ－２に記載の液晶表示装置。
［Ａ－５］液晶層及び液晶駆動回路部は、半導体基板上に形成されている、
　Ａ－１からＡ－４のいずれかに記載の液晶表示装置。
［Ａ－６］２系統の保持容量は、トランジスタのゲート電極と半導体基板との間に形成されるゲート容量構造、又は、配線上に形成されるＭＩＭ構造から成る、
　Ａ－５に記載の液晶表示装置。
≪Ｂ．電子機器≫
［Ｂ－１］画素電極、画素電極に対向する対向電極、及び、画素電極と対向電極との間に封入された液晶層を有する液晶部、並びに、
　周期的に極性が変化する正極性の映像信号及び負極性の映像信号を別々に保持する２系統の保持容量を有し、２系統の保持容量の保持電圧を液晶部の画素電極に交互に印加する液晶駆動回路部、
　を含む画素が配置されて成り、
　対向電極には、正極性の映像信号及び負極性の映像信号に同期して極性が周期的に反転するコモン電圧が全画素共通に印加され、
　２系統の保持容量には、基準電位として異なる極性の電位が印加される、
　液晶表示装置を有する電子機器。
［Ｂ－２］液晶駆動回路部は、
　信号線を通して供給される正極性の映像信号及び負極性の映像信号を交互に２系統の保持容量に取り込む２系統の第１転送ゲート部、及び、
　２系統の保持容量の保持電圧を液晶部の画素電極に全画素一括で交互に印加する２系統の第２転送ゲート部を有する、
　Ｂ－１に記載の液晶表示装置。
［Ｂ－３］ＶＡ方式の液晶分子配列であるとき、正極性の映像信号を保持する保持容量の基準電位を接地電位に設定し、負極性の映像信号を保持する保持容量の基準電位を電源電位に設定する、
　Ｂ－１又はＢ－２に記載の液晶表示装置。
［Ｂ－４］ＴＮ方式の液晶分子配列であるとき、正極性の映像信号を保持する保持容量の基準電位を電源電位に設定し、負極性の映像信号を保持する保持容量の基準電位を接地電位に設定する、
　Ｂ－１又はＢ－２に記載の液晶表示装置。
［Ｂ－５］液晶層及び液晶駆動回路部は、半導体基板上に形成されている、
　Ｂ－１からＢ－４のいずれかに記載の液晶表示装置。
［Ｂ－６］２系統の保持容量は、トランジスタのゲート電極と半導体基板との間に形成されるゲート容量構造、又は、配線上に形成されるＭＩＭ構造から成る、
　Ｂ－５に記載の液晶表示装置。 <Configuration that the present disclosure can take>
In addition, this indication can also take the following structures.
≪A. Liquid crystal display device >>
[A-1] a pixel electrode, a counter electrode facing the pixel electrode, a liquid crystal unit having a liquid crystal layer sealed between the pixel electrode and the counter electrode, and
There are two storage capacitors that hold the positive polarity video signal and the negative polarity video signal whose polarity changes periodically, and the holding voltages of the two retention capacitances are alternately applied to the pixel electrodes of the liquid crystal unit. LCD drive circuit
A pixel including
A common voltage whose polarity is periodically inverted in synchronization with the positive polarity video signal and the negative polarity video signal is applied to the common electrode in common for all pixels,
Potentials with different polarities are applied as reference potentials to the two storage capacitors.
Liquid crystal display device.
[A-2] The liquid crystal drive circuit section is
Two systems of first transfer gate portions for alternately taking in a positive video signal and a negative video signal supplied through a signal line into two storage capacitors; and
Having two systems of second transfer gate sections for alternately applying the holding voltages of the two systems of holding capacitors to the pixel electrodes of the liquid crystal section collectively for all pixels;
A liquid crystal display device according to A-1.
[A-3] When the VA liquid crystal molecular arrangement is used, the reference potential of the holding capacitor for holding the positive video signal is set to the ground potential, and the reference potential of the holding capacitor for holding the negative video signal is set as the power source. Set to potential,
A liquid crystal display device according to A-1 or A-2.
[A-4] When the TN liquid crystal molecular arrangement is used, the reference potential of the storage capacitor holding the positive video signal is set to the power supply potential, and the reference potential of the storage capacitor holding the negative video signal is grounded. Set to potential,
A liquid crystal display device according to A-1 or A-2.
[A-5] The liquid crystal layer and the liquid crystal drive circuit section are formed on a semiconductor substrate.
A liquid crystal display device according to any one of A-1 to A-4.
[A-6] The two storage capacitors consist of a gate capacitor structure formed between the gate electrode of the transistor and the semiconductor substrate, or an MIM structure formed on the wiring.
A liquid crystal display device according to A-5.
≪B. Electronic equipment >>
[B-1] a pixel electrode, a counter electrode facing the pixel electrode, a liquid crystal unit having a liquid crystal layer sealed between the pixel electrode and the counter electrode, and
There are two storage capacitors that hold the positive polarity video signal and the negative polarity video signal whose polarity changes periodically, and the holding voltages of the two retention capacitances are alternately applied to the pixel electrodes of the liquid crystal unit. LCD drive circuit
A pixel including
A common voltage whose polarity is periodically inverted in synchronization with the positive polarity video signal and the negative polarity video signal is applied to the common electrode in common for all pixels,
Potentials with different polarities are applied as reference potentials to the two storage capacitors.
An electronic device having a liquid crystal display device.
[B-2] The liquid crystal drive circuit section
Two systems of first transfer gate portions for alternately taking in a positive video signal and a negative video signal supplied through a signal line into two storage capacitors; and
Having two systems of second transfer gate sections for alternately applying the holding voltages of the two systems of holding capacitors to the pixel electrodes of the liquid crystal section collectively for all pixels;
A liquid crystal display device according to B-1.
[B-3] When the VA liquid crystal molecular arrangement is used, the reference potential of the storage capacitor holding the positive video signal is set to the ground potential, and the reference potential of the storage capacitor holding the negative video signal is set to the power source. Set to potential,
A liquid crystal display device according to B-1 or B-2.
[B-4] When the liquid crystal molecule arrangement is a TN system, the reference potential of the holding capacitor holding the positive video signal is set to the power supply potential, and the reference potential of the holding capacitor holding the negative video signal is grounded. Set to potential,
A liquid crystal display device according to B-1 or B-2.
[B-5] The liquid crystal layer and the liquid crystal drive circuit unit are formed on the semiconductor substrate.
The liquid crystal display device according to any one of B-1 to B-4.
[B-6] The two storage capacitors consist of a gate capacitor structure formed between the gate electrode of the transistor and the semiconductor substrate, or an MIM structure formed on the wiring.
The liquid crystal display device according to B-5.
　１０・・・画素、２０・・・画素アレイ部、３０・・・走査線駆動部、４０・・・信号線駆動部、５１（５１1～５１m）・・・走査線、５２（５２1～５２m）・・・信号線、６０・・・液晶部（液晶素子）、６１・・・画素電極、６２・・・対向電極（共通電極）、６３・・・液晶層、７０・・・液晶駆動回路部 10 ... pixel 20 ... pixel array unit, 30 ... scanning line drive unit, 40 ... signal line drive unit, 51 (51 1 ~ 51 m ) ··· scanning line, 52 (52 1 To 52 m ) ... signal line, 60 ... liquid crystal part (liquid crystal element), 61 ... pixel electrode, 62 ... counter electrode (common electrode), 63 ... liquid crystal layer, 70 ... LCD drive circuit

Claims (7)

  1. 　画素電極、画素電極に対向する対向電極、及び、画素電極と対向電極との間に封入された液晶層を有する液晶部、並びに、
    　周期的に極性が変化する正極性の映像信号及び負極性の映像信号を別々に保持する２系統の保持容量を有し、２系統の保持容量の保持電圧を液晶部の画素電極に交互に印加する液晶駆動回路部、
    　を含む画素が配置されて成り、
    　対向電極には、正極性の映像信号及び負極性の映像信号に同期して極性が周期的に反転するコモン電圧が全画素共通に印加され、
    　２系統の保持容量には、基準電位として異なる極性の電位が印加される、
    　液晶表示装置。     A pixel electrode, a counter electrode facing the pixel electrode, a liquid crystal portion having a liquid crystal layer sealed between the pixel electrode and the counter electrode, and
    There are two storage capacitors that hold the positive polarity video signal and the negative polarity video signal whose polarity changes periodically, and the holding voltages of the two retention capacitances are alternately applied to the pixel electrodes of the liquid crystal unit. LCD drive circuit
    A pixel including
    A common voltage whose polarity is periodically inverted in synchronization with the positive polarity video signal and the negative polarity video signal is applied to the common electrode in common for all pixels,
    Potentials with different polarities are applied as reference potentials to the two storage capacitors.
    Liquid crystal display device.
  2. 　液晶駆動回路部は、
    　信号線を通して供給される正極性の映像信号及び負極性の映像信号を交互に２系統の保持容量に取り込む２系統の第１転送ゲート部、及び、
    　２系統の保持容量の保持電圧を液晶部の画素電極に全画素一括で交互に印加する２系統の第２転送ゲート部を有する、
    　請求項１に記載の液晶表示装置。     The liquid crystal drive circuit section
    Two systems of first transfer gate portions for alternately taking in a positive video signal and a negative video signal supplied through a signal line into two storage capacitors; and
    Having two systems of second transfer gate sections for alternately applying the holding voltages of the two systems of holding capacitors to the pixel electrodes of the liquid crystal section collectively for all pixels;
    The liquid crystal display device according to claim 1.
  3. 　ＶＡ方式の液晶分子配列であるとき、正極性の映像信号を保持する保持容量の基準電位を接地電位に設定し、負極性の映像信号を保持する保持容量の基準電位を電源電位に設定する、
    　請求項１に記載の液晶表示装置。     When the liquid crystal molecular arrangement is a VA system, the reference potential of the storage capacitor that holds the positive video signal is set to the ground potential, and the reference potential of the storage capacitor that holds the negative video signal is set to the power supply potential.
    The liquid crystal display device according to claim 1.
  4. 　ＴＮ方式の液晶分子配列であるとき、正極性の映像信号を保持する保持容量の基準電位を電源電位に設定し、負極性の映像信号を保持する保持容量の基準電位を接地電位に設定する、
    　請求項１に記載の液晶表示装置。     When the TN liquid crystal molecular arrangement is used, the reference potential of the storage capacitor that holds the positive video signal is set to the power supply potential, and the reference potential of the storage capacitor that holds the negative video signal is set to the ground potential.
    The liquid crystal display device according to claim 1.
  5. 　液晶層及び液晶駆動回路部は、半導体基板上に形成されている、
    　請求項１に記載の液晶表示装置。     The liquid crystal layer and the liquid crystal driving circuit unit are formed on a semiconductor substrate.
    The liquid crystal display device according to claim 1.
  6. 　２系統の保持容量は、トランジスタのゲート電極と半導体基板との間に形成されるゲート容量構造、又は、配線上に形成されるＭＩＭ構造から成る、
    　請求項５に記載の液晶表示装置。     The two storage capacitors are composed of a gate capacitor structure formed between the gate electrode of the transistor and the semiconductor substrate, or an MIM structure formed on the wiring.
    The liquid crystal display device according to claim 5.
  7. 　画素電極、画素電極に対向する対向電極、及び、画素電極と対向電極との間に封入された液晶層を有する液晶部、並びに、
    　周期的に極性が変化する正極性の映像信号及び負極性の映像信号を別々に保持する２系統の保持容量を有し、２系統の保持容量の保持電圧を液晶部の画素電極に交互に印加する液晶駆動回路部、
    　を含む画素が配置されて成り、
    　対向電極には、正極性の映像信号及び負極性の映像信号に同期して極性が周期的に反転するコモン電圧が全画素共通に印加され、
    　２系統の保持容量には、基準電位として異なる極性の電位が印加される、
    　液晶表示装置を有する電子機器。     A pixel electrode, a counter electrode facing the pixel electrode, a liquid crystal portion having a liquid crystal layer sealed between the pixel electrode and the counter electrode, and
    There are two storage capacitors that hold the positive polarity video signal and the negative polarity video signal whose polarity changes periodically, and the holding voltages of the two retention capacitances are alternately applied to the pixel electrodes of the liquid crystal unit. LCD drive circuit
    A pixel including
    A common voltage whose polarity is periodically inverted in synchronization with the positive polarity video signal and the negative polarity video signal is applied to the common electrode in common for all pixels,
    Potentials with different polarities are applied as reference potentials to the two storage capacitors.
    An electronic device having a liquid crystal display device.
PCT/JP2018/001042 2017-03-03 2018-01-16 Liquid crystal display device and electronic apparatus WO2018159120A1 (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05119742A (en) * 1991-10-25 1993-05-18 Nec Corp Liquid crystal panel driving method
JPH06149185A (en) * 1992-11-10 1994-05-27 Sharp Corp Liquid crystal driving circuit
JPH11160676A (en) * 1997-12-01 1999-06-18 Hitachi Ltd Liquid crystal display device
JP2001188217A (en) * 1999-10-20 2001-07-10 Sharp Corp Active matrix liquid crystal display device, and driving method and manufacturing method therefor
JP2002082659A (en) * 2000-07-03 2002-03-22 Victor Co Of Japan Ltd Liquid crystal display device
JP2008203627A (en) * 2007-02-21 2008-09-04 Hitachi Displays Ltd Liquid crystal display device
JP2011039310A (en) * 2009-08-12 2011-02-24 Victor Co Of Japan Ltd Liquid crystal display device and driving method thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05119742A (en) * 1991-10-25 1993-05-18 Nec Corp Liquid crystal panel driving method
JPH06149185A (en) * 1992-11-10 1994-05-27 Sharp Corp Liquid crystal driving circuit
JPH11160676A (en) * 1997-12-01 1999-06-18 Hitachi Ltd Liquid crystal display device
JP2001188217A (en) * 1999-10-20 2001-07-10 Sharp Corp Active matrix liquid crystal display device, and driving method and manufacturing method therefor
JP2002082659A (en) * 2000-07-03 2002-03-22 Victor Co Of Japan Ltd Liquid crystal display device
JP2008203627A (en) * 2007-02-21 2008-09-04 Hitachi Displays Ltd Liquid crystal display device
JP2011039310A (en) * 2009-08-12 2011-02-24 Victor Co Of Japan Ltd Liquid crystal display device and driving method thereof

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