WO2002065203A1 - Affichage a cristaux liquides et procede de reparation de celui-ci - Google Patents

Affichage a cristaux liquides et procede de reparation de celui-ci Download PDF

Info

Publication number
WO2002065203A1
WO2002065203A1 PCT/JP2002/001288 JP0201288W WO02065203A1 WO 2002065203 A1 WO2002065203 A1 WO 2002065203A1 JP 0201288 W JP0201288 W JP 0201288W WO 02065203 A1 WO02065203 A1 WO 02065203A1
Authority
WO
WIPO (PCT)
Prior art keywords
pixel electrode
pixel
liquid crystal
voltage
electrode
Prior art date
Application number
PCT/JP2002/001288
Other languages
English (en)
Japanese (ja)
Inventor
Kenji Nakao
Tsuyoshi Uemura
Junichi Kobayashi
Yoshinori Tanaka
Keisuke Tsuda
Hideya Kawashima
Original Assignee
Matsushita Electric Industrial Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Publication of WO2002065203A1 publication Critical patent/WO2002065203A1/fr

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136213—Storage capacitors associated with the pixel electrode
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136259—Repairing; Defects

Definitions

  • the present invention relates to a liquid crystal display device having a plurality of pixels arranged vertically and horizontally and a method for repairing the same, and more particularly, to repairing defective pixels by laser irradiation. And a method for repairing the same.
  • BACKGROUND ART In recent years, liquid crystal display devices have been widely used as thin and low power consumption display devices. In order to adapt to higher precision of displayed image data, the number of pixels has been increased or the pixel structure has been reduced. Development is under way. However, the production yield of liquid crystal display devices has been a problem for a long time, and this tendency tends to be more remarkable as the number of pixels is increased or the pixel structure is miniaturized.
  • a defective pixel is a bright or dark spot on the screen due to an abnormal operation of a switching element such as a TFT for controlling the pixel, or a short-circuit of an auxiliary capacitor that holds the display voltage of the pixel. Is a pixel that appears as In particular, since defective pixels at bright spots are easily conspicuous, the quality of a display device is impaired if there is at least one such defective pixel. Therefore, studies for repairing defective pixels at bright spots have been conducted.
  • No. 8119 a defective pixel in a bright spot mode is corrected to a defective pixel in a black spot mode to make it inconspicuous.
  • a pixel defect repair method and its display are disclosed.
  • Japanese Patent Publication No. 8-19 as shown in FIG. 21, when there is a defective pixel in a bright spot mode that significantly degrades image quality, laser irradiation is performed on the pixel transistor 1 of the defective pixel and the repair wiring 3. This indicates that a DC voltage or an AC voltage higher than the threshold voltage of the liquid crystal is applied to the correction wiring 3 which is short-circuited and is electrically connected to the pixel electrode 5. It is stated that this makes it possible to correct a defective pixel in the bright spot mode to a defective pixel in the black spot mode to make it inconspicuous.
  • the above restoration method is assumed to be a TN (Twisted Nema Uc) type liquid crystal display device. Attention has been paid.
  • FIG. 1 is a sectional view schematically showing the configuration of an OCB type liquid crystal display device.
  • FIG. 1 (a) shows the splay alignment state
  • FIG. 1 (b) shows the bend alignment state.
  • the OCB-type liquid crystal display device includes a liquid crystal layer 105 having a plurality of liquid crystal molecules 101, a pixel substrate 102 a sandwiching the liquid crystal layer 105, and a counter substrate 102 b. It has. Then, on the surface of the pixel substrate 102 a on the side opposite to the liquid crystal layer 105, a retardation plate 103 a and a polarizing plate 104 a are sequentially laminated, and the opposing substrate 102 b is formed. On the surface opposite to the liquid crystal layer 105, a retardation plate 103b and a polarizing plate 104b are sequentially laminated.
  • a counter electrode is formed on the surface of the counter substrate 102b on the liquid crystal layer 105 side, and is formed on the surface of the pixel substrate 102a on the liquid crystal layer 105 side.
  • a plurality of pixel electrodes, a switching element such as a TFT, a source line and a gate line, and the like are formed on the substrate.
  • the plurality of pixel electrodes are formed independently for each pixel region, and each is paired with a counter electrode to apply a voltage to the liquid crystal layer 105 in each pixel region.
  • the pixel substrate 102a and the counter substrate 102b are transparent, and an active matrix substrate formed of a glass substrate or the like is used for the pixel substrate 102a. Is often done.
  • the retardation plate adjusts the phase difference between the polarization components of the incident light so that the switching between the transmission and the blocking of the incident light is effectively performed.
  • the liquid crystal molecules 101 are rod-like molecules such as spheroids, and their major axes are the upper and lower pixel substrates 102 a and the opposing substrate.
  • the rubbing treatment parallel alignment treatment applied to 102 b It is oriented in the bing direction (left-right direction in the drawing) and is parallel to the cross section shown.
  • the alignment state of the liquid crystal molecules 101 is controlled by a voltage applied to the liquid crystal layer 105.
  • the liquid crystal molecules 101 near the center of the liquid crystal layer 105 are formed by the pixel substrate 102a and the opposing substrate 102. It is almost horizontal to the interface between b and the liquid crystal layer 105.
  • a transition voltage is applied to the liquid crystal layer 105, the liquid crystal layer transitions to a bend alignment state (FIG. 1 (b)).
  • the liquid crystal molecules 101 near the center of the liquid crystal layer 105 change their directions from the splay alignment state greatly, and the pixel substrate 102 a or the opposing substrate 102 b and the liquid crystal layer 10 It is almost perpendicular to the interface with 5.
  • a relatively large transition voltage for example, about 25 V is applied between the pixel electrode and the counter electrode.
  • the transition voltage and the application time vary depending on the target liquid crystal display device.
  • the OCB type liquid crystal display device when the power is turned off, the liquid crystal molecules 101 of the liquid crystal layer 105 are in a splay alignment state.
  • a transition voltage is applied between the pixel electrode and the counter electrode to change the splay orientation state to the bend orientation state, and display a screen using the bend orientation state. . Therefore, the OCB type liquid crystal display device is superior in high-speed response characteristics to a conventional TN (Twisted Nematic) type liquid crystal display device using a twist alignment state.
  • TN Transmission Nematic
  • the display of the defective pixel may not be black but may be drooping.
  • the present inventors have found that a defective pixel cannot be reliably repaired. Hereinafter, this problem will be described in more detail.
  • Figure 2 shows the voltage (arbitrary unit) -brightness (arbitrary unit) characteristic curves for (a) a normally white TN liquid crystal display, (b) a normally white OCB liquid crystal display, and (C) A graph showing a normally black type OCB type liquid crystal display device.
  • the threshold voltage V t1 on the low voltage side and the threshold voltage on the high voltage side are shown. There is a value voltage V t 2. Then, between the two threshold voltages, the higher the voltage applied to the liquid crystal layer, the lower the luminance. However, when a voltage lower than the threshold voltage Vt1 on the low voltage side is applied, the brightness becomes constant at the highest level, and conversely, a voltage higher than the threshold voltage Vt2 on the high voltage side is applied. Then, the brightness becomes constant at the lowest state. Therefore, if the voltage applied to the liquid crystal layer is equal to or higher than the threshold voltage Vt2 on the high voltage side, the display of the defective pixel can be reliably turned black.
  • JP-A No. 8-19 also states that "a DC voltage or an AC voltage higher than the threshold voltage of the liquid crystal is applied to the correction wiring 3 electrically connected to the pixel electrode 5".
  • the optimum voltage ( Hereafter, there are a white display voltage (Vh) and an optimal voltage (hereinafter, black display voltage) Vb for making the pixel display black. Then, between the white display voltage V h and the black display voltage V b, the brightness decreases as the voltage applied to the liquid crystal layer increases as in the case of the TN type liquid crystal display device.
  • Vh white display voltage
  • Vb black display voltage
  • the brightness becomes minimum at the black display voltage Vb, and increases when the applied voltage to the liquid crystal layer is higher than the black display voltage Vb. Brightness is high.
  • the voltage applied to the liquid crystal layer is equal to or lower than the white display voltage Vh, the brightness is reduced as the applied voltage is reduced.
  • the OCB type liquid crystal display device is different from the TN type liquid crystal display device in such characteristics.
  • the TN type liquid crystal display device when the black display voltage Vb is about 6'.5 to 7.5 V, the TN type liquid crystal display device When a relatively high voltage of about 15 V is applied to the pixel electrode of the defective pixel as in the case of the above, the area where the luminance has increased again is applied to the display of the defective pixel by the luminance floating characteristic of the characteristic curve 202. would. As a result, the defective pixel was displayed in gray instead of black, and as a result, it was found that the defective pixel could not be repaired.
  • No. 035 discloses a metal thin film in each pixel region as shown in FIG.
  • a liquid crystal display device having an island 12 made of a metal thin film and a bridge 13 of a metal thin film extending over an adjacent island 12 via an insulating layer.
  • the insulating layer separating the island 12 and the bridge 13 is melted by laser light, and the island 12 and the pre-image are melted. It is described that the defective pixel can be made inconspicuous by connecting the defective pixel to the same pixel as the adjacent pixel by connecting the defective pixel to the adjacent pixel.
  • the restoration method that connects adjacent pixels as described above requires a specific display image, such as a still image with a low gradation or a slow-moving moving image, such as word processing software used in offices or drawing creation software.
  • this method was not suitable, and there was a limit to making defective pixels inconspicuous.
  • the effect was low when the resolution was lower than the XGA class.
  • the present invention has been made in order to solve the above-mentioned problem, and an object of the present invention is to provide a liquid crystal display device capable of making a defective pixel generated inconspicuous and a method for repairing the liquid crystal display device.
  • the pixel substrate is based on a plurality of source lines and a plurality of gate lines crossing each other, pixel electrodes arranged in a matrix, and a signal voltage input from the gate line.
  • the counter substrate is provided with a counter electrode facing the pixel electrode,
  • At least a part of the overlap film is arranged so as to overlap the pixel electrode and the auxiliary capacitance line, and the pixel electrode and the auxiliary capacitance line are insulated by an insulating layer.
  • the brightness of the liquid crystal layer becomes minimum when a black display voltage is applied between the pixel electrode and the counter electrode when displaying black, and is lower than the black display voltage between the pixel electrode and the counter electrode.
  • the brightness of the liquid crystal layer increases regardless of whether a high or low voltage is applied.
  • a voltage substantially equal to the black display voltage is applied to the auxiliary capacitance line.
  • the pixel electrode becomes a defective pixel in such a liquid crystal display device
  • a laser is irradiated to the overlap film overlapping the pixel electrode which has become the defective pixel, and a gap between the pixel electrode and the auxiliary capacitance line is formed.
  • the liquid crystal display device can be repaired by connecting the pixel electrode and the auxiliary capacitance line by melting the insulating layer.
  • the pixel substrate includes a plurality of source lines and a plurality of gate lines crossing each other, pixel electrodes arranged in a matrix, and a pixel line from the source line based on a signal voltage input from the gate line.
  • the counter substrate includes a counter electrode facing the pixel electrode,
  • At least a part of the transparent film is arranged so as to overlap the pixel electrode and the gate line, the pixel electrode and the gate line are insulated by an insulating layer, and the brightness of the liquid crystal layer is black.
  • the black display voltage applied between the pixel electrode and the counter electrode is applied, the minimum value is obtained when the voltage is higher than the black display voltage between the pixel electrode and the counter electrode. Even if a voltage is applied, the brightness of the liquid crystal layer increases and the signal voltage for turning off the switching element is almost the same as the black display voltage.
  • a liquid crystal display device that achieves the above object, A pixel substrate, a counter substrate facing the pixel substrate, and a liquid crystal layer sandwiched between the pixel substrate and the counter substrate.
  • the pixel substrate includes a plurality of source lines and a plurality of gate lines that intersect each other, pixel electrodes arranged in a matrix, and a source line based on a signal voltage input from the gate lines.
  • the counter substrate has a counter electrode facing the pixel electrode
  • the brightness of the liquid crystal layer becomes minimum when a black display voltage is applied between the pixel electrode and the counter electrode when displaying black, and is lower than the black display voltage between the pixel electrode and the counter electrode.
  • the brightness of the liquid crystal layer increases even when a high voltage or a low voltage is applied, and the same voltage as the black display voltage is applied to the counter electrode.
  • the pixel substrate is formed based on a plurality of source lines and a plurality of gate lines crossing each other, pixel electrodes arranged in a matrix, and a signal voltage input from the gate line.
  • the counter substrate includes a counter electrode facing the pixel electrode,
  • At least a part of the overlap film is disposed so as to overlap the first connection portion, the second connection portion, and the pixel electrode, and the first connection portion and the pixel electrode are electrically connected.
  • the second connection portion and the pixel electrode are insulated by the insulating layer.
  • a laser is applied to a wiring connecting the source line and the first connection portion, so that the wiring passes through the first switching element. Disconnect the connection between the source line and the pixel electrode By irradiating a laser to a portion overlapping the second connection portion and electrically connecting the second connection portion and the pixel electrode, the source line and the pixel electrode are connected via the second switching element.
  • the liquid crystal display device can be repaired by making an electrical connection between the liquid crystal display device.
  • the pixel substrate includes a plurality of source lines and a plurality of gate lines crossing each other, pixel electrodes arranged in a matrix, and a source line based on a signal voltage input from the gate lines.
  • an overlap film made of
  • the counter substrate includes a counter electrode facing the pixel electrode,
  • At least a portion of the overlap film is disposed so as to overlap the first auxiliary capacitance film, the second auxiliary capacitance film, and the pixel electrode, and electrically connects the first auxiliary capacitance film and the pixel electrode.
  • the second auxiliary capacitance film and the pixel electrode are insulated by the insulating layer.
  • the first auxiliary capacitance film is connected to the pixel electrode by irradiating a laser to the first overlapping capacitance film to irradiate the first pixel.
  • the connection between the second auxiliary capacitance film and the pixel electrode is reduced. Can be electrically connected to repair the LCD device.
  • the pixel substrate is formed in such a manner that a plurality of source lines and a plurality of gate lines intersecting with each other, a main pixel electrode arranged in a matrix, and a layer adjacent to the same layer as the main pixel electrode.
  • a first auxiliary capacitance film and a second auxiliary capacitance film arranged so as to overlap with the gate line via an insulating layer,
  • the counter substrate includes a counter electrode facing the pixel electrode,
  • the first auxiliary pixel electrode and the main pixel electrode are electrically connected, and the second auxiliary pixel electrode and the main pixel electrode are insulated by an insulating layer.
  • the liquid crystal display device By irradiating a laser to the second auxiliary pixel electrode or the main pixel electrode, the liquid crystal display device can be repaired by connecting the second auxiliary pixel electrode and the main pixel electrode.
  • a liquid crystal display device according to a seventh aspect of the present invention that achieves the above object,
  • the pixel substrate is formed in such a manner that a plurality of source lines and a plurality of gate lines intersecting with each other, a main pixel electrode arranged in a matrix, and a layer close to the same layer as the main pixel electrode are formed.
  • a voltage applied to the first auxiliary pixel electrode and the second auxiliary pixel electrode from the source line based on the signal voltage input from the first auxiliary pixel electrode and the second auxiliary pixel electrode and the gate line.
  • a first switching element and a second switching element which are respectively switched, and a first auxiliary pixel electrode and a second auxiliary pixel which are arranged so as to overlap with a gate line via an insulating layer, respectively;
  • the counter substrate includes a counter electrode facing the pixel electrode,
  • the first auxiliary pixel electrode is connected to the main pixel electrode, and the second auxiliary pixel electrode is insulated from the main pixel electrode.
  • the first auxiliary pixel electrode or the main pixel electrode is irradiated with laser so that the first auxiliary pixel electrode and the main pixel electrode are separated from each other.
  • the connection between the source line and the pixel electrode via the first switching element is cut off by insulating them,
  • the source line and the pixel electrode are connected to each other through the second switching element.
  • the LCD can be repaired by connecting between
  • FIG. 1 is a sectional view schematically showing a configuration of a 0CB type liquid crystal display device.
  • FIG. 1 (a) shows the splay alignment state
  • FIG. 1 (b) shows the bend alignment state.
  • Figure 2 shows the voltage (arbitrary unit) -brightness (arbitrary unit) characteristic curves for (a) a normally white TN liquid crystal display, (b) a normally white OCB liquid crystal display, and c) A graph showing a normally black OCB liquid crystal display device.
  • FIG. 3A is a plan view schematically showing a pixel configuration in the liquid crystal display device (first invention) according to the first embodiment.
  • Fig. 3 (b) is a characteristic curve of voltage (arbitrary unit) and luminance (arbitrary unit) in a normally-one-white type OCB type liquid crystal display device.
  • FIG. 4 is a cross-sectional view taken along the line XI-XI ′ of FIG.
  • FIG. 5A is a circuit diagram schematically illustrating a pixel configuration of the liquid crystal display device according to the first invention.
  • Figure 5 (b) is a characteristic curve of voltage (arbitrary unit) and luminance (arbitrary unit) of a normally-one-white OCB type liquid crystal display device.
  • FIG. 6A shows an image in the liquid crystal display device according to the second embodiment (second invention).
  • FIG. 3 is a plan view schematically showing an elementary configuration.
  • FIG. 6 (b) is a voltage (arbitrary unit) -brightness (arbitrary unit) characteristic curve in a normally white ⁇ CB type liquid crystal display device.
  • FIG. 7 is a cross-sectional view taken along the line X 2 -X 2 ′ of FIG.
  • FIG. 8A is a circuit diagram schematically illustrating a pixel configuration of the liquid crystal display device according to the second invention.
  • Figure 8 (b) shows the voltage (arbitrary unit) -brightness (arbitrary unit) characteristic curve for a normally-white OCB liquid crystal display device.
  • FIG. 9 is a plan view schematically showing a pixel configuration in a liquid crystal display device (a fourth invention) according to a fourth embodiment.
  • FIG. 10 is a cross-sectional view taken along the line X 3 -X 3 ′ of FIG.
  • FIG. 11 is a cross-sectional view taken along the line X4-X4 'of FIG.
  • FIG. 12 is a circuit diagram schematically illustrating a pixel configuration of a liquid crystal display device for explaining the fourth and fifth inventions.
  • FIG. 13 is a plan view schematically showing a pixel configuration in a liquid crystal display device (a fifth invention) according to the fifth embodiment.
  • FIG. 14 is a cross-sectional view taken along the line X5-X5 'of FIG.
  • FIG. 15 is a cross-sectional view taken along the line X6-X6 'of FIG.
  • FIG. 16 is a plan view schematically showing a pixel configuration in a liquid crystal display device (sixth invention) according to Embodiment 6.
  • FIG. 17 is a cross-sectional view taken along the line X 7 -X 7 ′ of FIG.
  • FIG. 18 is a plan view schematically showing a pixel configuration in the liquid crystal display device (seventh invention) according to the seventh embodiment.
  • FIG. 19 is a cross-sectional view taken along the line X8-X8 'of FIG.
  • FIG. 20 is a plan view schematically showing a pixel configuration in the liquid crystal display device according to the embodiment of the present invention.
  • FIG. 21 is a plan view showing a pixel electrode of the liquid crystal display device described in FIG. 1 of Japanese Patent Application Laid-Open No. Hei 4 (1995) -43219.
  • FIG. 22 is a plan view showing a pixel electrode of the liquid crystal display device described in FIG. 1 of Japanese Patent Application Laid-Open No. 8-32805, which is a conventional technique.
  • BEST MODE FOR CARRYING OUT THE INVENTION will be described in detail with reference to the drawings.
  • FIG. 3 (a) is a plan view schematically showing a pixel configuration in the liquid crystal display device (first invention) according to Embodiment 1
  • FIG. 4 is a plan view of XI—XI in FIG. 3 (a).
  • 'It is a cross-sectional view at the cross section.
  • the liquid crystal display device according to the first embodiment includes source lines 30 la and 30 lb, and gate lines 30 2 a and 30 2 b substantially orthogonal to the source lines 301 a and 301 b.
  • a TFT 303 serving as a switching element
  • a pixel electrode 304 a pixel electrode 304
  • an auxiliary capacitance line 308 an overlap film 601, and a signal control wiring 604.
  • FIG. 5A is a circuit diagram schematically illustrating a pixel configuration of the liquid crystal display device according to the first invention. Although FIG. 5A shows only one pixel area, such pixels are arranged in a matrix. This is the same in the following description.
  • the source terminal 303 x of the TFT 303 is connected to the source line 30 la
  • the gate terminal 303 y is connected to the gate line 302 a
  • the drain terminal 0 3 z is connected to the pixel electrode 304.
  • the auxiliary capacitance line 308 is arranged between two adjacent gate lines 302a and 302b.
  • a main capacitance (C LC ) 307 which is a capacitance of the liquid crystal layer is formed between the pixel electrode 304 and the counter electrode 306.
  • the auxiliary capacitance (C sl ) 305 assists the main capacitance (C LC ) 307, and is placed between two adjacent gate lines 302 a and 302 b.
  • a source signal is transmitted to the source lines 301a and 301, and a gate signal is transmitted to the gate lines 302a and 302b.
  • the source signal is a signal corresponding to the luminance level of the display in each pixel region, and is transmitted to the pixel electrode 304 in each pixel region at a predetermined writing frequency.
  • the gate signal is transmitted to the TFT 304 at a specific timing in order to transmit a source signal corresponding to the pixel electrode 304 in each pixel region. Is a signal for performing switching.
  • the counter electrode 306 is omitted.
  • the overlap film 601 in the liquid crystal display device according to Embodiment 1 is disposed so as to overlap the pixel electrode 304 and the auxiliary capacitance line 308, and FIG.
  • the pixel electrode 304 and the auxiliary capacitance line 308 are insulated by the insulating layer 701.
  • the pixel electrode 304 when the pixel electrode 304 becomes a defective pixel due to abnormal operation of the TFT 303 or the like, a laser is irradiated to the overlapping film 601 of the defective pixel, and the fusion connection receiving the laser is performed.
  • part A the insulating layer 701 between the pixel electrode 304 and the auxiliary capacitance line 308 shown in FIG. 4 is melted, and the space between the pixel electrode 304 and the auxiliary capacitance line 308 shown in FIG. Connecting.
  • a driving means for controlling the driving of the liquid crystal layer is connected to the pixel electrode 304 of the defective pixel as shown in FIG. 5 (b) and FIG. 3 (b).
  • a voltage adjusted to the black display voltage Vb is applied to the stored auxiliary capacitance line 308.
  • a driving condition of applying a voltage of 6.5 V to 7.5 V as the black display voltage Vb to the auxiliary capacitance line 308 is effective, and the defective pixel is not effectively inconspicuous. We were able to.
  • the laser is applied to the above overlap film 601 of the defective pixel, and the It can be repaired by melting the insulating layer between the electrode 304 and the auxiliary capacitance line 308 and connecting the pixel electrode 304 and the auxiliary capacitance line 308 .
  • a desired voltage can be applied to the pixel electrode 304 via the auxiliary capacitance line 308.
  • the black display voltage Vb is generally 6.5 V-7, 5 V, depending on the retardation value of the phase difference plate and the like.
  • the voltage applied to the counter electrode 306 is set to a constant value of 0 V, and the auxiliary capacitance line 308 May be varied with an amplitude of 6.5 to 7.5 V. It is necessary that the storage capacitor line 308 and the counter electrode 306 be insulated reliably in order to apply a desired voltage to the liquid crystal layer.
  • a transparent electrode such as ITO (Indium T in Oxide) is used for the pixel electrode 304, and the energy of the irradiated laser is hardly absorbed by the pixel electrode 304.
  • the overlap film 601 made of a light-absorbing material is desirably formed of a metal or the like that absorbs the light energy of the irradiated laser well and melts.
  • the transparent film 600 may be directly disposed on the upper surface of the pixel electrode 304 without interposing the insulating layer 71 shown in FIG. According to this, the same effect as above can be obtained.
  • the transparent film 601 is formed between the pixel electrode 304 made of a transparent electrode and the auxiliary capacitance line 308 by the metal layer left when the source lines 301 a and 301 b are formed. It may be located.
  • the laser passes through the pixel electrode 304 composed of a transparent electrode, and is formed by a metal parallel film 601 disposed between the pixel electrode 304 and the auxiliary capacitance line 308. Absorbed, the surrounding insulating layer is melted, and the pixel electrode 304 and the auxiliary capacitance line 308 can be electrically connected.
  • the pixel electrode 304 is made of aluminum or the like and used as a reflective electrode, as in a reflective liquid crystal display device, when the pixel electrode 30 overlaps with the auxiliary capacitance line 308, the overlap film 601 is formed. Will also serve as a role. That is, in this case, it is not necessary to form the overlap film 601 separately from the pixel electrode 304.
  • R-OCB Reflective-OCB
  • the pixel electrode 304 and the storage capacitor line 308 are insulated from each other, and a storage capacitor (C sl ) 305 is formed between the two.
  • a storage capacitor (C sl ) 305 is formed between the two.
  • the voltage applied to the auxiliary capacitance line 308 is changed, the potential of the pixel electrode 304 changes under the influence of the change. Therefore, when the writing frequency of the voltage applied to the pixel electrode 304 and the restoration frequency of the voltage applied to the auxiliary capacitance line 308 match each other, the brightness at the upper and lower portions of the display screen of the liquid crystal display device is reduced. Different brightness Tilt may occur.
  • the liquid crystal display device further includes a driving unit that controls driving of the liquid crystal layer, wherein the driving unit outputs a voltage having a frequency different from the frequency of the voltage applied to the pixel electrode.
  • the voltage is applied to the auxiliary capacitance line.
  • the voltage applied to the auxiliary capacitance line is preferably the black display voltage Vb, which can prevent the occurrence of a luminance gradient.
  • the writing frequency was set to 30 Hz in which 60 display screens were written in both positive and negative polarities per second in order to avoid the above-mentioned luminance gradient.
  • the restoration frequency for changing the voltage applied to the auxiliary capacitance line 308 was set to 300 Hz, which is higher than the writing frequency.
  • the driving unit applies a voltage different from the frequency of the voltage applied to the pixel electrode, in particular, a voltage having a frequency lower than the writing frequency to the auxiliary capacitance line.
  • a good screen display can be obtained by setting the frequency of the voltage applied to the auxiliary capacitance line 308 to five times or more the writing frequency which is the frequency of the voltage applied to the pixel electrode.
  • the frequency of the voltage applied to the auxiliary capacitance line is more preferably five times or more the frequency of the voltage applied to the pixel electrode. As a result, flickering of the screen is prevented, and a better screen display is obtained.
  • an additional storage capacitor may be further formed between any one of the two gate lines defining the pixel region and the pixel electrode to reduce the storage capacity.
  • the gate line forming the additional storage capacitor is preferably a preceding gate line which is not connected to the switching element corresponding to the pixel region. That is, in FIG. 5 (a), in order to compensate for the insufficient capacity of the auxiliary capacitance (C sl ) 305 , an additional auxiliary capacitance (shown in FIG. May be further formed, and these may be used in combination. This makes it possible to use an additional storage capacitor (not shown) in the former gate line 302 b together, and to supplement the storage capacitor (C sl ) 305 in the storage capacitor line 308. It becomes possible.
  • the gate line 302a controls the gate terminal of the TFT303.
  • the signal control wiring 604 is connected to the T
  • the source terminal of FT303 is connected to the source line 301a, and the drain terminal is connected to the pixel electrode 304 via the pixel electrode connection portion 603.
  • the control of the gate line 302a becomes invalid, and the source terminal and the drain terminal may be electrically connected.
  • the source line 301a and the pixel electrode 304 are short-circuited regardless of the timing of the gate signal. Therefore, when the defective pixel is repaired, the pixel electrode 304 and the storage capacitor are connected as described above.
  • the connection between the pixel electrode 3 04 and the source line 3 0 1 a by the TFT 3 0 3 should be cut off to isolate the faulty TFT 3 0 3. Is desirable.
  • the drive voltage applied between the pixel electrode and the counter electrode decreases as the voltage increases.
  • the OCB type liquid crystal display device in the normally single white mode has been described as an example, but the present invention is also applicable to a normally black mode OCB type liquid crystal display device whose characteristics are shown in FIG. 2 (c).
  • the white display voltage V h and the black display voltage V b if the driving voltage applied between the pixel electrode and the counter electrode is set to a low voltage, the brightness decreases, and the black display voltage V b Has a minimum value, and when the voltage is further reduced, the luminance increases.
  • FIG. 6 (a) is a plan view schematically showing a pixel configuration in a liquid crystal display device (second invention) according to Embodiment 2
  • FIG. 7 is a plan view of X 2 ⁇ in FIG. 6 (a).
  • FIG. 4 is a cross-sectional view taken along the X 2 ′ cross section.
  • the liquid crystal display device according to the second embodiment includes source lines 30 la and 301 b and gate lines 30 2 a and 30 2 substantially orthogonal to the source lines 301 a and 301 b. b, a TFT 303 serving as a switching element, a pixel electrode 304, a parallel film 801, and a signal control wiring 604.
  • the counter electrode 306 and the like are omitted.
  • FIG. 8A is a circuit diagram schematically showing a pixel configuration of the liquid crystal display device according to the second invention.
  • the pixel configuration shown in FIG. 8A does not have the storage capacitor line 308 shown in FIG. 5A, and the storage capacitor (C sl ) 305 a is connected to the gate line 302 b and the pixel electrode. Formed between 3 and 4. Other configurations are the same as those shown in FIG. 5 (a).
  • the gate line forming the auxiliary capacitance (C st ) 305 a is a switch corresponding to the pixel region among the two gate lines 302 a and 302 b defining the pixel region. It is preferable that the former gate line 302 b is a gate line to which the switching element 303 is not connected.
  • the overlap film 801 in the liquid crystal display device according to the second embodiment is disposed so as to overlap with the previous gate line 302b and the pixel electrode 304.
  • the pixel electrode 304 and the overlap film 801 are connected at the overlap film connecting portion C, but are connected to the gate line 310 b in the preceding stage and the overlap. It is insulated from the single wrap film 8 0 1 by a fusion connection B.
  • the optical characteristics of the overlap film 801 are the same as in the first embodiment.
  • the overlapping film 801 of the defective pixel is irradiated with a laser, and the overlapped film is melted at the fusion connection portion B receiving the laser.
  • the insulating layer 9 0 1 and the overlap film 8 0 1 that insulate the connection between the pixel electrode 3 0 4 and the gate line 3 0 2 b of the previous stage via 8 0 1 are melted and the overlap film 8 is melted.
  • defective pixels can be reliably displayed black and the defective pixels can be made inconspicuous.
  • a liquid crystal display device having a brightness floating characteristic as in the above-described OCB type liquid crystal display device that is, in a state where no voltage is applied between the pixel electrode 304 and the counter electrode 310.
  • the liquid crystal molecules are in splay alignment, are in bend alignment by applying a transition voltage, and are driven in a bend alignment state by application of a driving voltage.
  • the absolute values of the gate lines 302a and 302b are generally black. A voltage higher than the display voltage is applied. The voltage applied to the gate lines 302 a and 302 b is at the 1 ow level most of the time, and the pixel electrode 3 connected to the gate lines 302 a and 302 b High level only when 04 is selected. This is because, in a defective pixel that should display black, the applied voltage that affects the luminance is temporally averaged to be about 1 ow level, ie, about 15 V.
  • the laser is applied to the overlapping film 801 of the defective pixel.
  • the laser is applied to melt the insulating layer between the pixel electrode 304 and the former gate line 302 b, thereby connecting the pixel electrode 304 and the gate line 302 b. It can be repaired.
  • the gate lines 302a and 302b are connected to a period during which the switching element 303 is turned on (in this period, about +15 V is applied to the gate line 302a). Since the voltage of a large absolute value, such as about 15 V, is applied to turn off the switching element 303, the gate line 302a, When 302b is connected to the pixel electrode 304 of the defective pixel, a voltage higher than the threshold voltage Vt2 on the high voltage side is applied to a TN-type liquid crystal display device or the like having no luminance floating characteristics described above. As a result (see Fig. 2 (a)), the display of defective pixels can be reliably made black and the defective pixels can be made inconspicuous.
  • the black display voltage is 6.5 to 7.5 V
  • a voltage whose absolute value is higher than the black display voltage is applied to the liquid crystal layer, so Defective pixels cannot be displayed in black due to the floating characteristics (see Fig. 2 (b)). Therefore, as shown in FIGS. 8 (b) and 6 (b), when the second invention is applied to the OCB type liquid crystal display device, when the switching element 303 is turned off, the gate line is turned off. Is configured to substantially match the voltage applied to the black display voltage.
  • the display of the defective pixel can be reliably changed to black.
  • Defective pixels could be made inconspicuous.
  • the driving voltage is preferably, for example, 6.0 to 7.0 V, and thereby the liquid crystal display device can be operated satisfactorily.
  • a driving means for controlling the driving of the liquid crystal layer is further provided, and at least one of the pixel substrate and the counter substrate is provided with a phase difference plate (not shown). Is preferably provided.
  • the retardation value of the liquid crystal layer 105 and the pixel substrate 102a and the counter substrate 102b are arranged respectively.
  • the retardation values of the retardation plates 103a and 103b are designed so that the retardation sum, which is a value that is offset by the retardation values, is minimized. That is, it is designed such that the luminance, which is a function of the total retardation, becomes lowest when a black display voltage is applied.
  • the retardation value can be expressed as a product of the refractive index anisotropy ( ⁇ ) and the thickness (d) in a direction perpendicular to the surface of the pixel substrate 102 a or the counter substrate 102 b.
  • the change in the retardation value of the liquid crystal layer due to the applied voltage becomes gentler as the driving voltage is higher. Since the retardation value of the retardation plate is not affected by the applied voltage, the change in luminance due to the applied voltage becomes gentler as the driving voltage is higher. Therefore, by increasing the drive voltage, it is possible to suppress the brightness floating characteristic as shown by the characteristic curve 202 in FIG.
  • the liquid crystal display device further includes a driving unit for controlling driving of the liquid crystal layer, and a retardation plate is provided on at least one of the pixel substrate and the counter substrate.
  • a driving unit for controlling driving of the liquid crystal layer
  • a retardation plate is provided on at least one of the pixel substrate and the counter substrate.
  • the liquid crystal molecules are in a splay alignment in a state where no voltage is applied between the pixel electrode and the counter electrode, are in a bend alignment by applying a transition voltage, and are bend by applying a driving voltage.
  • the liquid crystal display device further includes a driving unit for controlling driving of the liquid crystal layer, and a retardation plate is provided on at least one of the pixel substrate and the counter substrate. It is preferable that the retardation value of the liquid crystal layer and the retardation value of the retardation plate be set so that the average voltage applied to the gate line from the driving means is in the range of 12.5 V to 13.5 V. It is desirable that the total sum of the sunset and the data value is 30 nm or less. Also in this case, the liquid crystal display device can be satisfactorily operated while making the repaired defective pixels inconspicuous.
  • the total retardation is set to any value of 10 to 30 nm, and the absolute value of the temporal average value is applied to the gate lines 302 a and 302 b during driving.
  • a voltage having any value of 14.5 to 15.5 V was applied, and the drive voltage was set to any value of 6.5 to 7.5 V.
  • a 15 nm retardation plate was placed on each of the upper and lower sides of the liquid crystal panel so as to overlap the pixel substrate and the opposing substrate. With such a design, the liquid crystal display device was able to operate normally while making the repaired defective pixels inconspicuous.
  • a 10 nm retardation plate may be disposed on each of the upper and lower sides of the liquid crystal panel, and the total retardation may be set to 20 nm or less.
  • the effective driving voltage is reduced due to the relatively large anisotropy ⁇ ⁇ ⁇ of the dielectric constant of the liquid crystal layer, for example, 7.8. Adjusting the sunset value is more effective than doing it.
  • the absolute value of the voltage applied to the gate lines 302a and 302b and approaching the black display voltage that is, by adjusting the drive voltage
  • the luminance floating characteristics can be suppressed. Good.
  • the average voltage applied to the gate line is in the range of 12.5 V to 13.5 V
  • the difference between the retardation value of the liquid crystal layer and the retardation value of the phase difference plate is reduced.
  • the sum of one section was set to 30 nm or less. With this design, the liquid crystal display device can be operated normally while making the repaired defective pixel inconspicuous.
  • the capacitance between the overlap film 801 and the gate line 302b in the preceding stage may be used as the auxiliary capacitance.
  • the limited area in the pixel region can be effectively used to form the storage capacitor.
  • the arrangement of the fusion joint B and the overlap film joint C may be interchanged, or the overlap film joint C may be a fusion joint that melts by laser irradiation. This makes it possible to adapt the second invention to a wide variety of manufacturing processes.
  • the overlap film 801 may be formed directly on the upper surface of the pixel electrode 304.
  • the source lines 301 a and 301 b may be formed below the pixel electrode 304 except for the metal layer at the time of formation.
  • the overlap film 801 may be formed integrally with the pixel electrode 304 or the preceding gate line 302b.
  • the second invention can be adapted to a wide variety of manufacturing processes.
  • the source lines 301a and 301b can be connected to the pixel electrodes 304 instead of the gate line 302b in the preceding stage.
  • an overlap film covers each of the pixel electrode 304 and the source lines 310a and 301b, and is irradiated by a laser.
  • the defective pixel is repaired by electrically connecting the pixel electrode and the source line.
  • Source signals corresponding to display data relating to pixels arranged in the vertical direction on the display screen are transmitted to the source lines. Therefore, the average value of the voltage applied to the pixel electrodes of the pixels arranged in the vertical direction is applied to the defective pixel. Therefore, the display of defective pixels can be made brighter on a bright screen and darker on a dark screen, and the display of defective pixels can be adjusted to the display state of the screen.
  • the third invention is directed to a liquid crystal display device in which liquid crystal molecules in a liquid crystal layer are in a splay alignment state or a bend alignment state, such as an OCB type liquid crystal display device.
  • the black display voltage Vb to the counter electrode, the voltage is applied to the liquid crystal layer even when there is a pixel electrode which is a defective pixel to which no voltage is applied because the switching element does not conduct.
  • the liquid crystal molecules can be prevented from being in the splay alignment state, and defective pixels can be made inconspicuous.
  • the voltage applied to the counter electrode preferably has a frequency in the range of 25 to 35 Hz and a voltage amplitude in the range of 2.5 V.
  • the display of defective pixels should be made inconspicuous by ensuring that the display of the defective pixels is black However, if a more complete restoration is desired, it is preferable to restore completely to a good pixel that works properly.
  • the fourth invention, the fifth invention, the sixth invention and the seventh invention have been made from such a viewpoint.
  • the defective pixel is repaired by replacing the TFT itself with a new TFT. That is, instead of making the display of defective pixels inconspicuous, Completely restores good pixels to work.
  • FIG. 9 is a plan view schematically showing a pixel configuration in a liquid crystal display device (fourth invention) according to Embodiment 4, and FIG. 10 is a cross-sectional view taken along the line X 3 -X 3 ′ in FIG.
  • FIG. 11 is a cross-sectional view taken along the line X 4 —X 4 ′ of FIG.
  • the liquid crystal display device according to the fourth embodiment (fourth invention) includes source lines 301 a and 301 b, and gate lines 302 a and 302 b.
  • a first TFT 303 a and a second TFT 303 b which are a first switching element and a second switching element, a pixel electrode 304, and a first overlap layer 100. 4 and signal control wiring 100 1.
  • Embodiment 4 shows the embodiment according to the above-described fourth invention.
  • a counter electrode 306 and the like are also provided.
  • the signal control wiring 100 1 is connected to the source line 3 O la at the signal control wiring connection section 100 2, and the first TFT 303 a and the second TFT 303 b are connected to the gate.
  • the voltage applied from the source line 301 a to the first connection portion 103 based on the signal voltage input from the G line, and the voltage applied from the source line 301 a to the second connection portion 502
  • the voltage applied to the signal control wiring 1001 is switched.
  • the first overwrap layer 104 is made of a light-absorbing material such as a metal, and has a first connection portion 1003, a second connection portion 502, and a pixel electrode 304.
  • the first connection portion 1003 and the pixel electrode 304 are electrically connected to each other via the pixel electrode connection portion 105 so as to overlap with each other.
  • the second connection portion 502 and the pixel electrode 304 are insulated by the insulating layer 111 shown in FIG. Therefore, in a normal state, the first TFT 303 a operates as the TFT 303 shown in FIG. 8A that switches between the source line 30 la and the pixel electrode 304.
  • the second TFT 303 b is disconnected from the pixel electrode 304 by the second connection portion 502.
  • the first TFT cutting section 501 on the signal control wiring 1001 shown in FIG. To cut off the connection between the source line 301 a and the pixel electrode 304 by the failed first TFT 303 a, and the source via the second TFT 303 b.
  • the second connecting portion 502 that insulates between the line 301 a and the pixel electrode 304 is irradiated with laser, and the new second TFT 303 b is used to irradiate the source line 301 a with the source line 310 a. It is connected to the pixel electrode 304.
  • the process of disconnecting the failed first TFT 303a from the pixel electrode 304 and connecting the new second TFT 303b to the pixel electrode 304 can be easily performed. Defective pixels due to abnormalities in the switching element can be completely restored to normal pixels.
  • connection by laser irradiation becomes easy.
  • the first cutting section 501 is connected from the source line 301 of the signal control wiring 101 to the first TFT connecting section 103 via the first TFT 303a.
  • the second TFT on the path from the first TFT connecting portion 1003 to the pixel electrode connecting portion 105 in the first overlap layer 1004. It is preferable to protect the circuit from the source line 301 to the pixel electrode 304 via the layer 303 b.
  • the second connection section 502 insulates any one between the source line 301 and the second TFT 303 b and between the second TFT 303 b and the pixel electrode 304.
  • any material may be used as long as it is melted by laser irradiation and connects the insulating portions.
  • FIG. 12 is a circuit diagram schematically illustrating a pixel configuration of a liquid crystal display device for explaining the fourth and fifth inventions.
  • the liquid crystal display device includes source lines 301 a and 301 b, a gate line 302 a, a preceding gate line 302 b, and a pixel electrode 310. 4 and a counter electrode 300, which are the same as those of the liquid crystal display device shown in FIG. 5 (a) or FIG. 8 (a).
  • the liquid crystal display device according to the fourth aspect of the present invention is different from the liquid crystal display device of FIG. 8A in that the first TFT 303 and the second switching element are replaced by a first TFT 303 a shown in FIG. And a second TFT 303 b.
  • the source line 301a and the pixel electrode 304 are electrically connected via the first TFT 303a, and the source line 301a via the second TFT 303b.
  • the pixel electrode 304 and the pixel electrode 304 are insulated at the second TFT insulating section 502. Therefore, under normal conditions, the first TFT 303a operates as the TFT 303 shown in FIG. 8 (a). I do.
  • the defective pixel in a defective pixel caused by a short-circuit of an auxiliary capacitance, the defective pixel is repaired by replacing the auxiliary capacitance itself with a new auxiliary capacitance. That is, instead of making the display of the defective pixel inconspicuous, it is completely restored to a normally operating good pixel.
  • FIG. 13 is a plan view schematically showing a pixel configuration in the liquid crystal display device (the fifth invention) according to the fifth embodiment
  • FIG. 14 is a view showing X 5 —X 5 ′ in FIG.
  • FIG. 15 is a cross-sectional view taken along a cross section.
  • FIG. 15 is a cross-sectional view taken along the line X 6 -X 6 ′ of FIG.
  • the liquid crystal display device includes a source line 301a, 301b, a gate line 302a, 302b, and a TFT serving as a switching element. It includes a pixel electrode 304, a pixel electrode 304, a second overlap layer 1303, and a signal control wiring 604.
  • the auxiliary capacitance line 308 is used in place of the former gate line 302 b, but these are the same as those shown in FIG.
  • the fifth embodiment shows the embodiment according to the fifth invention described above. Although omitted here, a counter electrode 306 and the like are also provided.
  • the liquid crystal display device includes a first auxiliary capacitance film 130 arranged so as to overlap with the gate line 302 a via the insulating layer 140 1. 1 a and a second auxiliary capacitance film 130 lb. And .. the first storage capacitor film 1301a is connected to the storage capacitor line 308 by a first storage capacitor (C sll ) 30 5b, and the second storage capacitor film 1301b forms a second storage capacitor (C sl2 ) 305c with the storage capacitor line 308 (see FIG. 12 ). ).
  • the second overlap layer 1303 is made of a light-absorbing material, and overlaps the first auxiliary capacitance film 1301a, the second auxiliary capacitance film 1301b, and the pixel electrode 304. And is connected to the pixel electrode 340 via the pixel electrode connection portion 134.
  • the first auxiliary capacitance film 130 la is connected to the second overlap layer 130 3 via the first auxiliary capacitance connection portion 1302. Therefore, it is connected to the pixel electrode.
  • the connection between the second storage capacitor film 1301 and the pixel electrode 304 is insulated by the second storage capacitor insulating portion 504. Therefore, only the first auxiliary capacitance (C su ) 305 b operates as an auxiliary capacitance, and the second auxiliary capacitance (C sl2 ) 305 c is in a disconnected state.
  • the fifth embodiment when a defective pixel is generated due to a short circuit of the first auxiliary capacitance (C sll ) 305 b, a gap between the first auxiliary capacitance film 1301 a and the pixel electrode 304 is generated.
  • the first auxiliary capacitance film 1303a and the pixel electrode 304 are illuminated. Is disconnected, and the second auxiliary capacitance insulating section 5 provided on the second overlap layer 1303 that insulates the second auxiliary capacitance film 1301b from the pixel electrode 304.
  • the second auxiliary capacitance film 1301b is connected to the pixel electrode 304. More thereto, cutting the first auxiliary capacitor (C sn) 3 0 5 b shorted, the second auxiliary capacitor (C st 2) 3 0 5 c can be connected as an auxiliary capacitor, the defective pixel to the normal It can be completely restored to a good working pixel. In this way, the second connection between the pixel electrode 304 and the first storage capacitor film 1301a and the connection between the pixel electrode 304 and the second storage capacitor insulating portion 504 are performed. The provision of the two layers 1303 facilitates connection by laser irradiation.
  • the second auxiliary capacitance insulating section 504 insulates between the second auxiliary capacitance film 1301b and the pixel electrode 304 and melts by laser irradiation to connect the insulating portions. Anything is acceptable.
  • the first auxiliary capacitance disconnecting section 503 is connected to the first auxiliary capacitance connecting section 1 of the second overlap layer 1303 in order to isolate a short-circuited portion that causes a defective pixel.
  • the liquid crystal display device includes the first auxiliary capacitance film and the second auxiliary capacitance film, whereby the auxiliary capacitance C sl ) 305 a shown in FIG. instead, the first auxiliary capacitor (C sll) 3 0 5 b and the second auxiliary capacitor (C sl2) and a 3 0 5 c.
  • the first auxiliary capacitance film 1301a is electrically connected to the pixel electrode 304, and a second auxiliary capacitance is provided between the second auxiliary capacitance film 1301b and the pixel electrode 304. Insulated by 504.
  • the first auxiliary capacitance (C sU ) 305 b operates as the auxiliary capacitance (C sl ) 305 a shown in FIG.
  • the first auxiliary capacitor (C sll) 3 0 first to form a 5 b of the auxiliary capacitor film 1 3 0 1 a
  • An arbitrary portion of the wiring connecting the pixel electrode 304 and the pixel electrode 304 is irradiated with a laser to cut off the connection between the first auxiliary capacitance film and the pixel electrode.
  • the second auxiliary capacitance insulating section 504 is irradiated with a laser, and the second auxiliary capacitance film 13 lb forming the second auxiliary capacitance (C sl2 ) 3 05 c and the pixel electrode 304 are formed. Is electrically connected to This makes it possible to completely repair a defective pixel due to an abnormality in the storage capacitance to a normal pixel.
  • the first auxiliary capacitor (C sll) 3 0 5 b and the second auxiliary capacity (C sl2) 3 0 5 c in place of the auxiliary capacitance line 3 0 8, the gate lines 3 0 2 b and the pixel electrode 3 0 It is also possible to form between 4.
  • FIG. 16 is a plan view schematically showing a pixel configuration in a liquid crystal display device (sixth invention) according to Embodiment 6, and FIG. 17 is a view showing a portion of X 7 -X 7 ′ in FIG. It is a sectional view in a section.
  • the liquid crystal display device includes a source line 301a, 301b and a gate line 302a, 30b. 2 b and A TFT 303 serving as an switching element and a signal control wiring 604 are provided.
  • the auxiliary capacitance line 308 is used in place of the former gate line 302 b, but these are the same as those shown in FIG. Embodiment 6 shows the above-described embodiment according to the sixth invention.
  • a counter electrode 306 and the like are also provided.
  • the liquid crystal display device includes a first auxiliary capacitance film 160 arranged so as to overlap with the gate line 302 a via the insulating layer 170 1. 1 a and a second auxiliary capacitance film 1601 b.
  • the first auxiliary capacitance film 1601a forms a first auxiliary capacitance (C sll ) 305b with the auxiliary capacitance line 308
  • the second auxiliary capacitance film 160 1b forms a second storage capacitor (C si2 ) 305c with the storage capacitor line 308 .
  • the liquid crystal display device has a structure in which the main pixel electrode 304 ′ arranged in each pixel region and the main pixel electrode 304 ′ are close to the same layer. It has a first auxiliary pixel electrode 304 b and a second auxiliary pixel electrode 304 a formed. Then, at the cutting line 503 'between the first auxiliary pixel electrode 304b and the main pixel electrode 304', the first auxiliary pixel electrode 304b and the main pixel electrode 304 ' Are electrically connected to each other, and the second auxiliary capacitance insulating section 504 between the second auxiliary pixel electrode 304 a and the main pixel electrode 304 ′ has a second auxiliary pixel.
  • the electrode 304 a and the main pixel electrode 304 ′ are insulated by an insulating layer.
  • the first auxiliary capacitance film 1601a is connected to the first auxiliary pixel electrode 304b connected to the main pixel electrode 304 'via the first auxiliary capacitance connection section 1602.
  • the second auxiliary capacitance film 1601b is connected to the second auxiliary pixel electrode 304a insulated from the main pixel electrode 304 '.
  • the second auxiliary pixel electrode 304 a and the main pixel electrode 304 ′ are insulated by the second auxiliary capacitance insulating section 504. Therefore, only the first storage capacitor ( Csli ) 305b operates as a storage capacitor.
  • the second auxiliary pixel electrode 304 a is preferably formed simultaneously with the main pixel electrode 304 ′.
  • the first auxiliary capacitance disconnecting portion provided between the first auxiliary pixel electrode 304 b connected to the first auxiliary capacitance film 1601 a and the main pixel electrode 304 ′
  • the first auxiliary pixel electrode 304b connected to the short-circuited first auxiliary capacitance film 1601a is separated from the main pixel electrode 304 '.
  • a second auxiliary capacitance insulating portion 5 for insulating between the second auxiliary pixel electrode 304 a connected to the second auxiliary capacitance film 1601 b and the main pixel electrode 304 ′.
  • the main pixel electrode 304 ′ and the first can be cut between the auxiliary pixel electrode 304 b and the main pixel electrode 304 ′ and the second auxiliary pixel electrode 304 a.
  • No top layer is required. Thereby, the opening of each pixel region can be enlarged, and the manufacturing process can be shortened.
  • the liquid crystal display device has a structure in which a first auxiliary pixel electrode 1601a and a main pixel electrode 304 'corresponding to the pixel electrode 304 are arranged. Since they are electrically connected, a first auxiliary capacitance ( Csll ) 305b is formed between the gate line 302b and the first storage capacitance film 1601a . On the other hand, since the second auxiliary pixel electrode 1601b and the main pixel electrode 304 'are insulated by the insulating layer, the second auxiliary capacitance ( Csl2 ) 305c and The second auxiliary capacitance insulating section 504 is insulated from the main pixel electrode 304 ′.
  • a laser is placed between the first auxiliary pixel electrode 304b and the main pixel electrode 304 '. Irradiate to disconnect the connection between the first auxiliary pixel electrode 304 b and the main pixel electrode 304 ′, and irradiate the second auxiliary capacitance insulating section 504 with a laser, Auxiliary pixel electrode 304a and main Connected to the pixel electrode 304 '.
  • FIG. 18 is a plan view schematically showing a pixel configuration in the liquid crystal display device (seventh invention) according to the seventh embodiment.
  • FIG. 19 is a cross-sectional view taken along the line X 8 —X 8 ′ of FIG.
  • the liquid crystal display device includes a source line 301a, 301b, and a gate line 302a, 302 b, the first TFT 303 a and the second TFT 303 b which are the first switching element and the second switching element, and the signal control wiring 180 6. Have. These are the same as those shown in FIG. 12, and the seventh embodiment is a force showing the embodiment according to the seventh invention described above.
  • the first embodiment shown in FIG. 1 The TFT disconnecting section 501 and the first auxiliary capacitor disconnecting section 503 are integrated and changed to the first connecting section 50013, and the second connecting section 502 and the second auxiliary capacitor insulating section 50 4 was integrated into a second connection section 502 4.
  • the first TFT 303 and the second TFT 303 b are connected to the gate line 302 a from the source line 301 a based on the input signal voltage and the first connection part 501 103 And the voltage applied to the second connection section 502 is switched.
  • the liquid crystal display device includes a main pixel electrode 304 ′ disposed in each pixel region and a main pixel electrode 304 ′.
  • the first auxiliary pixel electrode 304 b and the main pixel electrode 304 ′ Is electrically connected to the second auxiliary pixel electrode 304 a and the main pixel electrode 304, at a second connection portion 502 4 between the second auxiliary pixel electrode 304 a and the main pixel electrode 304.
  • the auxiliary pixel electrode 304 a and the main pixel electrode 304 ′ are insulated by an insulating layer.
  • the connection between the source line 301 a and the main pixel electrode 304 ′ via the second TFT 303 b is insulated at the second connection part 504, and Only 303a operates as TFT303.
  • the detailed connection is as follows.
  • the first auxiliary capacitance film 180 la is connected to the main pixel electrode 304 ′ connected to the first auxiliary pixel electrode 304 b via the pixel electrode connection 1 ′ 802, and It is connected to the signal control wiring 1806 via the first TFT connection section 1804.
  • the signal control wiring 1806 is connected to the source line 301a via the first TFT303a.
  • the second auxiliary capacitance film 180 lb is connected to the second auxiliary pixel electrode 304 a through the pixel electrode connection portion 1803, and the second TFT connection portion 180 It is connected to signal control wiring 1806 through 05. Then, the signal control wiring 1806 is arranged so as to be connected to the source line 301a through the second TFT 303b.
  • the main pixel electrode 304 'and the second auxiliary pixel electrode 304a are insulated at the second connection portion 504, and the second TFT 303b is The main pixel electrode 304 ′ is cut off by the connection section 504.
  • the first auxiliary capacitance film 1801a and the second auxiliary capacitance film 1801b are connected via the gate line 302a and the insulating layer 1901 shown in FIG. They are arranged so that they overlap each other.
  • the first auxiliary capacitance film 1801a is connected to the main pixel electrode 304 'through the first auxiliary capacitance connection portion 1802, but the second auxiliary capacitance film 1801a b is connected to the second auxiliary pixel electrode 304 a insulated from the main pixel electrode 304 ′. Therefore, only the first storage capacitor (C sll ) 305 b operates as a storage capacitor.
  • the first connection section 501 13 is connected to the first auxiliary pixel electrode 304 b via the first auxiliary capacitance film 1801 a
  • the second connection section 50 01 2 4 is connected to the second auxiliary pixel electrode 304 a through the second auxiliary capacitance film 180 1 b, and the first auxiliary pixel electrode 304 b and the main pixel electrode 304 are connected.
  • the first storage capacitor film 180 when a defective pixel occurs due to an abnormal operation of the first TFT 303 a or a short circuit of the first storage capacitor ( Csll ) 305 b, the first storage capacitor film 180
  • the first connection portion 501 3 provided between the first auxiliary pixel electrode 304 b connected to 1 a and the main pixel electrode 304 ′ is irradiated with a laser, and the first The first auxiliary pixel electrode 304 b connected to the auxiliary capacitor film 1801 a and the drain terminal of the first TFT 303 a is separated from the main pixel electrode 304 ′.
  • the second connection portion 504 that connects between the second auxiliary pixel electrode 304 and the second auxiliary pixel electrode 304 a connected to the second auxiliary capacitance film 1801 b is irradiated with laser. Connect between 3 0 4 '.
  • the first storage capacitor (C sll ) 305 b can be disconnected
  • the second storage capacitor (C sl 2 ) 305 c can be connected as the storage capacitor
  • the first TFT It is possible to easily perform a process of disconnecting 0 3 a from the main pixel electrode 304 ′ and connecting a new second TFT 303 b to the main pixel electrode 304 ′.
  • the first auxiliary capacitance (C sll ) 305 b is short-circuited or when the first TFT 303 a fails, the same processing is performed to operate the defective pixel normally. Since it is possible to completely repair a defective pixel, the repair process of a defective pixel can be greatly simplified.
  • cutting is performed between the main pixel electrode 304 'and the first auxiliary pixel electrode 304b, and the main pixel electrode 304' and the second auxiliary pixel electrode are cut off. Since the connection can be made with 304a, the overlapping layer is not required. In addition, this makes it possible to enlarge the opening of each pixel area, and to shorten the manufacturing process.
  • the liquid crystal display device is electrically connected between the first auxiliary pixel electrode 304 b and the main pixel electrode 304 ′.
  • a first auxiliary capacitance (C sn ) 305b is formed between the gate line 302b and the first auxiliary capacitance film 304b .
  • the second auxiliary pixel electrode 304 a and the main pixel electrode 304 Is isolated from the second auxiliary capacitor (C sl2 ) 3 05 c and the main pixel electrode 304 by the second auxiliary capacitor insulating section 504. ing.
  • a first auxiliary pixel electrode 304 b and a first auxiliary pixel electrode 304 b ′ are provided between a source line 301 a via a first TFT 303 a serving as a first switching element and a main pixel electrode 304 ′. It is electrically connected by the connection between the main pixel electrode 304 'and the source line 301a via the second TFT 303b, which is the second switching element, to the main pixel electrode 3104. Is insulated from the second auxiliary pixel electrode 304 a by insulation between the second auxiliary pixel electrode 304 a and the main pixel electrode 304 ′.
  • the first auxiliary pixel electrode 304b and the main pixel electrode 304 Between the first auxiliary pixel electrode 304 b and the main pixel electrode 304 ′, and irradiate the laser to the second auxiliary capacitance insulating section 504. Irradiation connects the second auxiliary pixel electrode 304 a with the main pixel electrode 304 ′.
  • the defective pixel is repaired by connecting the pixel electrode of the defective pixel to the pixel electrode of an adjacent normal pixel. That is, Embodiment 8 aims at making the point defect hard to see by displaying the defective pixel in the same display as the surrounding good pixels, instead of displaying the defective pixel in black.
  • FIG. 20 is a plan view schematically showing a pixel configuration in the liquid crystal display device according to the embodiment of the present invention.
  • the overlap film 200 3 in the liquid crystal display device according to the embodiment 8 ′ is formed over the pixel electrode 304 and the adjacent pixel electrode 3 over the gate line 302 b. 0 4 ′, and is connected to the pixel electrode 304 via the overlap film connecting portion 200 2, and is insulated from the pixel electrode 304 ′ in contact with the fusion connecting portion 203. It is arranged so that.
  • the laser is irradiated to the fusion connection portion 203 on the overlap film 200 3, and the adjacent pixel electrode 304 is irradiated.
  • the insulating layer and the overlap film 203 between the '′ and the auxiliary capacitance line 308 are melted to connect the overlap film 200 3 to the adjacent pixel electrode 304 ′.
  • the pixel electrode 304 is controlled by the adjacent TFT 303 'together with the adjacent pixel electrode 304'.
  • the defective pixel can be displayed in the same manner as the surrounding good pixels, and the defective pixel can be made inconspicuous.
  • the liquid crystal display device When connecting the pixel electrodes between the defective pixel and surrounding good pixels, if the liquid crystal display device is a color display having a color filter, the pixel electrodes of the same color are connected. There is a need to. Therefore, in the eighth embodiment, a liquid crystal display device having a stripe arrangement in which pixels of the same color are arranged in the vertical direction of the screen is used as the color filter.
  • the color filter array has a delta array as another method, but the delta array is not suitable for the eighth embodiment since the same color is not adjacent.
  • the eighth embodiment is particularly effective for AV applications where there are many analog images, and is most suitable for liquid crystal TVs and the like.
  • analog video used here refers to general images such as multi-gradation images such as natural images and movies, and moving images with aggressive motion, and is used in word processing software used in offices of companies. This means that display images that do not require grayscale display such as Internet terminals (images used in an OA environment) are not included.
  • the effect is higher when the resolution is higher than GA class resolution.
  • the XGA class refers to those having 700 or more vertical display lines. Therefore, in Embodiment 7, it is desirable that the liquid crystal display device has 700 or more display pixels in the vertical direction of the display screen. In such a liquid crystal display device, defective pixels connected to adjacent pixels are particularly inconspicuous.
  • the arrangement of the fusion connection portion 203 and the overlap film connection portion 202 is exchanged, or both are fusion connection portions that are melted by laser irradiation. This allows it to be adapted to a wide variety of manufacturing processes.
  • INDUSTRIAL APPLICABILITY According to the present invention, there is provided a liquid crystal display device capable of making defective pixels inconspicuous and a method of repairing the same.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)

Abstract

L'invention concerne un affichage à cristaux liquides caractérisé en ce qu'il comprend un substrat de pixel, un contre-substrat opposé au substrat de pixel, et une couche de cristaux liquides maintenue entre le substrat de pixel et le contre-substrat. Le substrat de pixel possède des lignes sources (301a, 301b) et des lignes grilles (302a, 302b) coupant les lignes sources, une électrode de pixel (304) placée dans chaque région de pixel définie par deux lignes grilles adjacentes (302a, 302b) et deux lignes sources adjacentes (301a, 302b), un élément de commutation (303) pour commuter la tension appliquée à l'électrode de pixel (304) à partir de la ligne source (301a, 301b) en fonction de la tension d'un signal entré à travers la ligne grille (302a, 302b), une ligne de condensateur auxiliaire (308) placée entre deux lignes grilles adjacentes (302a, 302b) et conçue pour appliquer une tension prédéterminée, et un film de recouvrement (601) fait d'un matériau absorbant la lumière. Ce film de recouvrement (601) recouvre du moins partiellement l'électrode de pixel (304) et la ligne de condensateur auxiliaire (308), et l'électrode de pixel (304) est isolée de la ligne de condensateur auxiliaire (308).
PCT/JP2002/001288 2001-02-15 2002-02-15 Affichage a cristaux liquides et procede de reparation de celui-ci WO2002065203A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2001038048 2001-02-15
JP2001-038048 2001-02-15
JP2001084772 2001-03-23
JP2001-084772 2001-03-23

Publications (1)

Publication Number Publication Date
WO2002065203A1 true WO2002065203A1 (fr) 2002-08-22

Family

ID=26609429

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2002/001288 WO2002065203A1 (fr) 2001-02-15 2002-02-15 Affichage a cristaux liquides et procede de reparation de celui-ci

Country Status (1)

Country Link
WO (1) WO2002065203A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2357520A1 (fr) * 2008-12-10 2011-08-17 Sharp Kabushiki Kaisha Substrat de matrice active, procédé de fabrication de substrat de matrice active, panneau à cristaux liquides, procédé de fabrication de panneau à cristaux liquides, dispositif d'affichage à cristaux liquides, unité d'affichage à cristaux liquides et téléviseur
US8144304B2 (en) 2005-09-20 2012-03-27 Chimei Innolux Corporation Apparatus and method for driving a flat panel display and repairing a flat panel display signal line
CN101784949B (zh) * 2007-08-30 2013-10-02 夏普株式会社 显示装置及其制造方法

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0416930A (ja) * 1990-05-11 1992-01-21 Sharp Corp アクティブマトリクス型表示装置
JPH0421823A (ja) * 1990-05-16 1992-01-24 Hosiden Corp 液晶表示素子の点欠陥の黒欠陥化法及び液晶表示素子
JPH04291321A (ja) * 1991-03-20 1992-10-15 Fujitsu Ltd アクティブマトリックス液晶表示装置
JPH04324819A (ja) * 1991-04-25 1992-11-13 Seiko Epson Corp アクティブマトリックス表示体の画素欠陥修正方法及びその表示体
JPH0527262A (ja) * 1991-07-22 1993-02-05 Toshiba Corp 液晶表示装置
JPH0566415A (ja) * 1991-09-06 1993-03-19 Toshiba Corp アクテイブマトリクス型液晶表示装置
JPH06289426A (ja) * 1993-04-06 1994-10-18 Sharp Corp アクティブマトリクス表示装置の修正方法
JP2000259130A (ja) * 1999-03-10 2000-09-22 Sharp Corp 液晶表示装置及びその駆動方法
JP2001330850A (ja) * 2000-05-19 2001-11-30 Sharp Corp 液晶表示装置およびその欠陥修正方法

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0416930A (ja) * 1990-05-11 1992-01-21 Sharp Corp アクティブマトリクス型表示装置
JPH0421823A (ja) * 1990-05-16 1992-01-24 Hosiden Corp 液晶表示素子の点欠陥の黒欠陥化法及び液晶表示素子
JPH04291321A (ja) * 1991-03-20 1992-10-15 Fujitsu Ltd アクティブマトリックス液晶表示装置
JPH04324819A (ja) * 1991-04-25 1992-11-13 Seiko Epson Corp アクティブマトリックス表示体の画素欠陥修正方法及びその表示体
JPH0527262A (ja) * 1991-07-22 1993-02-05 Toshiba Corp 液晶表示装置
JPH0566415A (ja) * 1991-09-06 1993-03-19 Toshiba Corp アクテイブマトリクス型液晶表示装置
JPH06289426A (ja) * 1993-04-06 1994-10-18 Sharp Corp アクティブマトリクス表示装置の修正方法
JP2000259130A (ja) * 1999-03-10 2000-09-22 Sharp Corp 液晶表示装置及びその駆動方法
JP2001330850A (ja) * 2000-05-19 2001-11-30 Sharp Corp 液晶表示装置およびその欠陥修正方法

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8144304B2 (en) 2005-09-20 2012-03-27 Chimei Innolux Corporation Apparatus and method for driving a flat panel display and repairing a flat panel display signal line
CN101784949B (zh) * 2007-08-30 2013-10-02 夏普株式会社 显示装置及其制造方法
EP2357520A1 (fr) * 2008-12-10 2011-08-17 Sharp Kabushiki Kaisha Substrat de matrice active, procédé de fabrication de substrat de matrice active, panneau à cristaux liquides, procédé de fabrication de panneau à cristaux liquides, dispositif d'affichage à cristaux liquides, unité d'affichage à cristaux liquides et téléviseur
CN102209930A (zh) * 2008-12-10 2011-10-05 夏普株式会社 有源矩阵基板、有源矩阵基板的制造方法、液晶面板、液晶面板的制造方法、液晶显示装置、液晶显示单元、电视接收机
EP2357520A4 (fr) * 2008-12-10 2012-05-30 Sharp Kk Substrat de matrice active, procédé de fabrication de substrat de matrice active, panneau à cristaux liquides, procédé de fabrication de panneau à cristaux liquides, dispositif d'affichage à cristaux liquides, unité d'affichage à cristaux liquides et téléviseur
US8659712B2 (en) 2008-12-10 2014-02-25 Sharp Kabushiki Kaisha Active matrix substrate, method for manufacturing active matrix substrate, liquid crystal panel, method for manufacturing liquid crystal panel, liquid crystal display device, liquid crystal display unit, and television receiver

Similar Documents

Publication Publication Date Title
KR100719423B1 (ko) 액티브 매트릭스 기판 및 표시 장치
US5289174A (en) Liquid crystal display device
US7751010B2 (en) Patterned vertically aligned liquid crystal display
EP1837842B1 (fr) Substrat a matrice active, procede de fabrication de substrat a matrice active, ecran, ecran a cristaux liquides et systeme de television
US7838881B2 (en) Active matrix substrate, display device, television apparatus, manufacturing method of an active matrix substrate, and manufacturing method of a display device
CN100463018C (zh) 有源矩阵衬底、显示装置以及像素缺陷修正方法
US7551254B2 (en) Displaying device with predetermined pattern for repairing electrical defects having slit region in TFT controlled electrode in which a first slit therein corresponds to a space separating first and second capacitor electrodes
WO2006080129A1 (fr) Dispositif d'affichage, dispositif d'affichage a cristaux liquides et procede de fabrication du dispositif d'affichage
JP4667904B2 (ja) 表示装置
KR100497652B1 (ko) 액정 표시장치, 그 화소 수정방법 및 그 구동방법
JP2002350901A (ja) 液晶表示装置およびその修復方法
KR20010110985A (ko) 액정 패널의 결함 수정방법
CN101681070B (zh) 有源矩阵基板、液晶面板、液晶显示单元、液晶显示装置、电视接收机、和有源矩阵基板的制造方法
JP5112434B2 (ja) 液晶表示装置
JP2002303881A (ja) 電極基板、表示パネル及びそのリペア方法
US8525766B2 (en) Method of driving liquid crystal display device using alternating current voltages as storage capacitor voltage
WO2002065203A1 (fr) Affichage a cristaux liquides et procede de reparation de celui-ci
JP2001305586A (ja) 液晶表示装置、その画素修正方法及びその駆動方法
JP2006350348A (ja) 液晶表示装置及びその不良画素復旧方法
JP2002023195A (ja) 液晶表示素子
JPH03212620A (ja) アクティブマトリクス型液晶表示装置
JP3519275B2 (ja) アクティブマトリクス型液晶表示装置
KR101166584B1 (ko) 수평전계방식 액정표시소자
JP4459006B2 (ja) 液晶表示装置及びその製造方法
WO2021075462A1 (fr) Dispositif d'affichage à cristaux liquides

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CN KR SG US