WO2011048843A1 - 表示装置 - Google Patents
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- WO2011048843A1 WO2011048843A1 PCT/JP2010/059535 JP2010059535W WO2011048843A1 WO 2011048843 A1 WO2011048843 A1 WO 2011048843A1 JP 2010059535 W JP2010059535 W JP 2010059535W WO 2011048843 A1 WO2011048843 A1 WO 2011048843A1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3614—Control of polarity reversal in general
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
- G09G3/3655—Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/04—Structural and physical details of display devices
- G09G2300/0421—Structural details of the set of electrodes
- G09G2300/0426—Layout of electrodes and connections
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/04—Structural and physical details of display devices
- G09G2300/0439—Pixel structures
- G09G2300/0465—Improved aperture ratio, e.g. by size reduction of the pixel circuit, e.g. for improving the pixel density or the maximum displayable luminance or brightness
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
- G09G2300/0876—Supplementary capacities in pixels having special driving circuits and electrodes instead of being connected to common electrode or ground; Use of additional capacitively coupled compensation electrodes
Definitions
- the present invention relates to a display device. More specifically, the present invention relates to an active matrix drive type display device in which a storage capacitor is formed in a pixel.
- This liquid crystal display device includes a display panel such as a liquid crystal display panel in which a liquid crystal layer is disposed between two insulating substrates facing each other. On one substrate of the display panel, gate lines (scanning signal lines) and source lines (video signal lines) are provided in a grid pattern, and pixel electrodes for forming an image are arranged in a matrix pattern.
- a TFT is provided near the intersection of the gate line and the source line, and application of voltage to the pixel electrode is controlled.
- a common electrode for applying a voltage is provided between the other substrate of the display panel and the pixel electrode, and a capacitance is formed by the pixel electrode and the common electrode.
- the storage capacitor is generally formed by a pixel electrode or a counter electrode electrically connected to the pixel electrode and a storage capacitor wiring.
- capacitive coupling driving for raising the pixel potential of the pixel electrode can be performed.
- the amplitude of the voltage of the source signal can be reduced, and a sufficient contrast can be obtained.
- capacitive coupling drive for example, in a liquid crystal display device using an active matrix substrate, an original scanning signal (source signal) composed of an ON potential (Vgt) and an OFF potential (Vgb) of a switching element, and a parasitic capacitance
- the maximum amplitude of the scanning signal applied to the switching element is reduced by supplying it separately to two bias potentials (Ve (+), Ve (-)) that compensate for the potential drop due to the liquid crystal and the threshold voltage of the liquid crystal
- a liquid crystal display device see, for example, Patent Document 1 that can increase the reliability and reduce the cost.
- the output of the common electrode line driving circuit is binary, the configuration of the output circuit is simplified, and a liquid crystal display device capable of realizing bright adjustment by making one of these potentials variable (for example,
- the display device is driven by alternating current in order to suppress the deterioration of the liquid crystal and maintain the display quality, and usually inverts the polarity of the potential of the pixel electrode for each pixel in one row (1H [Horizontal] line inversion). Also called). Note that the direction parallel to the gate line is horizontal.
- a display device in particular, a photosensor-equipped model or the like, the above-described 1H line inversion is performed, and in order to obtain a pixel structure having a space for arranging an additional circuit such as a photosensor circuit, Therefore, the storage capacitor wiring shared by each other is provided.
- a display device see, for example, Patent Document 3 in which the storage capacitor wiring is shared between the pixels in the odd rows and the pixels in the even rows is disclosed.
- the pixels directly above and below are different in polarity from their own pixels. For this reason, the influence of the potential fluctuation of the upper and lower pixels does not change, and streaks due to the influence do not occur even though a uniform display signal is input. Therefore, it is not necessary to design in consideration of the influence.
- the raising and lowering of the potential of the pixel electrode by capacitive coupling is performed for each pixel in one row. For this reason, in the display device that performs the 1H line inversion described above, capacitive coupling driving cannot be performed using the storage capacitor wiring shared by the pixels in two rows.
- FIG. 6 is a plan view schematically showing circuit configurations of pixels on the active matrix substrate with circuit symbols in the display device shown in FIG.
- FIG. 7 is a conceptual diagram showing 1H line inversion in a conventional display device. In FIG. 7, one + or ⁇ corresponds to one pixel, and represents the polarity of the potential of the pixel electrode in the pixel.
- the inventors of the present invention have various display devices that can perform capacitive coupling driving after the storage capacitor wiring is shared by two rows of pixels in the storage capacitor portion and the aperture ratio and yield are sufficiently prevented.
- capacitive coupling driving for changing the potential of the pixel electrode of the pixels in the two rows by inverting the polarity of the potential of the pixel electrode for every two rows of pixels sharing the storage capacitor line. I found that I can do it. Therefore, in addition to the advantage of performing capacitive coupling driving, the storage capacitor wiring is shared by two rows of pixels, and it is found that the area occupied by the storage capacitor wiring can be reduced and the aperture ratio can be improved. It has also been found that the product yield can be improved by simplifying the pattern of the capacitor wiring, and the inventors have arrived at the present invention by conceiving that the above problems can be solved brilliantly.
- pixels arranged in a matrix of n rows and m columns (n and m each represent an integer of 2 or more), m source lines and n lines arranged in a lattice shape.
- a display device including a gate line wherein the display device includes a storage capacitor portion in a boundary region between pixels of odd-numbered rows and pixels of even-numbered rows, and the storage capacitor portion includes pixels of odd-numbered rows and even-numbered rows.
- a storage capacitor wiring, an insulating film, a counter electrode for odd-numbered pixels, and a counter electrode for even-numbered pixels, and the odd-numbered pixels are opposed to the odd-numbered pixels.
- a pixel electrode electrically connected to the electrode is provided, and the pixel in the even row is provided with a pixel electrode electrically connected to the counter electrode for the pixel in the even row, and the storage capacitor wiring is shared For each two rows of pixels, the polarity of the potential of the pixel electrode is inverted, and By changing the potential of the serial storage capacitor wiring, a display device for a capacitive coupling drive for changing the potential of the pixel electrode of the pixel of the second row.
- the pixels arranged in a matrix form may be pixels arranged in the row direction and the column direction, and include pixels in a delta arrangement.
- the polarity of the potential of the pixel electrode is inverted (also referred to as 2H line inversion) for each of the two rows of pixels sharing the storage capacitor line. Since the pixels in the row can be driven with the same polarity voltage, the potentials of the pixel electrodes of the pixels in the two rows can be changed by changing the potential of the storage capacitor wiring. In other words, capacitive coupling driving can be performed without dividing the storage capacitor wiring. Therefore, it is possible to sufficiently prevent the aperture ratio from being lowered. In addition, it is possible to sufficiently prevent a decrease in yield due to a short circuit between the divided storage capacitor wires. Furthermore, it is possible to obtain the advantage of performing capacitive coupling driving.
- V pix V sl + C cs / C pix ⁇ ⁇ V cs
- V pix is a pixel potential.
- V sl is a source signal voltage.
- V cs is a storage capacitor wiring voltage.
- C cs is a storage capacity.
- the display device of the present invention can make the V sl amplitude smaller than that of the conventional driving by performing capacitive coupling driving. Further, since the amplitude of V sl is limited due to the limitation of the driver, a high voltage can be applied by performing capacitive coupling driving.
- the application of high voltage makes it possible to improve the transmittance of the liquid crystal panel and thus the luminance (display performance) of the liquid crystal panel. Furthermore, since it is not necessary to divide the storage capacitor wiring into two, it is possible to avoid a decrease in yield caused by this leakage between the storage capacitor wires, and it is possible to reduce costs by improving the yield.
- the storage capacitor section includes a storage capacitor wiring shared by pixels in odd and even rows, an insulating film, a counter electrode for pixels in odd rows, and a counter electrode for pixels in even rows.
- a single storage capacitor line forms a storage capacitor for two rows of pixels, and a storage capacitor wire that is conventionally provided for each pixel of one row is provided for each pixel of two rows. Therefore, every other storage capacitor line is arranged in parallel with respect to the boundary region between the pixels in the odd rows and the pixels in the even rows that exist in parallel. Therefore, compared to a display device in which a storage capacitor line is arranged for each pixel, an installation area of the storage capacitor line can be reduced and an aperture ratio can be improved.
- the electrical resistance can be reduced by widening the wiring width per storage capacitor wiring.
- the yield can be improved by simplifying the pattern of the storage capacitor wiring.
- the present invention has achieved the advantage of using the storage capacitor wiring shared by the pixels of the odd and even rows in addition to the advantage of performing capacitive coupling driving.
- at least one of the storage capacitor wiring and the counter electrode is preferably formed of a light-shielding conductive material such as metal.
- the storage capacitor wiring preferably opposes the counter electrode for odd-numbered pixels and the counter electrode for even-numbered pixels with an insulating film interposed therebetween.
- the counter electrode is a storage capacitor electrode facing the storage capacitor wiring.
- the display device of the present invention includes a mode in which odd-numbered rows of pixels and even-numbered rows of pixels are inverted from each other.
- the counter electrode of the odd-numbered row pixel and the counter electrode of the even-numbered row pixel are close to each other, and the storage capacitor wiring shared by the odd-numbered and even-numbered row pixels is arranged. It becomes easy. For this reason, the effect of this invention can be exhibited more fully.
- a common additional circuit is provided between an odd-numbered row pixel and an even-numbered row pixel in which no storage capacitor wiring is arranged.
- capacitive coupling driving can be performed in the display device having the above-described pixel structure and a storage capacitor line can be provided for every two rows of pixels, an odd-numbered pixel and an even-numbered pixel in which no storage capacitor line is arranged thereby. It is possible to utilize the area between the pixels in the row. For example, by arranging the common additional circuit in this region, the aperture ratio can be increased as compared with the case where an additional circuit independent for each pixel is formed in another region.
- the type of the additional circuit include an optical sensor circuit and a memory circuit.
- the additional circuit is preferably a photosensor circuit.
- the present invention in the display device in which the storage capacitor line is shared by the odd-numbered pixels and the even-numbered pixels, capacitive coupling driving can be performed, the installation area of the storage capacitor wiring is reduced, and the aperture ratio is improved. Can be achieved. In addition, the yield can be improved by simplifying the pattern of the storage capacitor wiring.
- FIG. 3 is a schematic plan view illustrating a circuit configuration of a pixel on an active matrix substrate in the display device of Embodiment 1.
- FIG. 2 is a schematic cross-sectional view showing a configuration of a cut surface along the line AB in FIG. 1.
- 3 is a plan view schematically showing circuit configurations of pixels on an active matrix substrate by circuit symbols in the display device of Embodiment 1.
- FIG. 3 is a conceptual diagram illustrating 2H line inversion in the display device of Embodiment 1.
- FIG. It is a plane schematic diagram which shows the circuit structure of the pixel on an active matrix substrate in the conventional display apparatus. It is a top view which shows typically the circuit structure of the pixel on an active-matrix board
- the present invention will be described in more detail with reference to embodiments, but the present invention is not limited only to these embodiments.
- the following embodiments relate to a liquid crystal display device, but the display device of the present invention is not limited thereto.
- Embodiment 1 The liquid crystal display device according to the present embodiment includes pixels arranged in a matrix of n rows and m columns (n and m each represent an integer of 2 or more), m source lines provided in a grid pattern, A display device having n gate lines. Pixel drive control in the liquid crystal display device of the present embodiment is performed on an active matrix substrate in which thin film transistors (TFTs) and pixel electrodes are arranged in a matrix for each pixel.
- FIG. 1 is a schematic plan view illustrating a circuit configuration of a pixel on an active matrix substrate in the display device according to the first embodiment.
- FIG. 2 is a schematic cross-sectional view showing a configuration of a cut surface along the line AB in FIG.
- the TFT and the pixel electrode 18 are arranged for each pixel.
- the TFT is provided with a portion connected to the source line 16 by the first contact hole 31 on one side of the portion where the TFT semiconductor layer 12 made of silicon and the gate line 14 overlap with each other with the gate insulating film interposed therebetween.
- the other side is provided with a portion connected to the pixel electrode 18 by the second and third contact holes 32 and 33.
- the boundary line between the odd-numbered row pixels and the even-numbered row pixels is in a line-symmetric relationship with respect to the central axis. Therefore, in the boundary region between the pixels, the counter electrodes 22a of the odd-numbered pixels and the counter electrodes 22b of the even-numbered pixels are close to each other, and the storage capacitor wiring 24 shared by the odd-numbered and even-numbered pixels can be easily arranged. It becomes.
- the counter electrode 22a is provided so as to overlap the lower end portion of the pixel electrode 18 in the odd-numbered pixels
- the counter electrode 22b is provided so as to overlap the upper end portion of the pixel electrode 18 in the even-numbered pixels.
- the storage capacitor line 24 is formed in a region overlapping with the opposing electrodes 22a and 22b and a region between the opposing electrodes 22a and 22b. Further, in the present embodiment, in order to prevent the value of the storage capacitor from varying due to the disposition of the counter electrode 22 for each pixel, the storage capacitor wiring is provided by a margin corresponding to the disposition accuracy of the counter electrode 22. 24 is formed thick.
- the active matrix substrate of the present embodiment includes a TFT semiconductor layer 12, a gate insulating film 13, a gate line 14, a first interlayer insulating film 15, a source line 16,
- the second interlayer insulating film 17, the pixel electrode 18, and the alignment film 19 are sequentially stacked.
- the counter electrode 22 is formed of the same material as the TFT semiconductor layer 12 in the same layer as the TFT semiconductor layer 12
- the storage capacitor wiring 24 is formed of the same material as the gate line 14 in the same layer as the gate line 14,
- the counter electrode 22 and the storage capacitor wiring 24 face each other with the gate insulating film 13 interposed therebetween.
- the TFT semiconductor layer 12 and the counter electrode 22 can be simultaneously formed by photolithography.
- the gate line 14 and the storage capacitor wiring 24 can be simultaneously formed by photolithography.
- the pixel electrode 18 is formed in a rectangular shape.
- a region in the substrate surface on which the pixel electrode 18 is disposed is referred to as a pixel, and a direction along the long side is referred to as a vertical direction.
- a direction along the short side is referred to as a horizontal direction.
- the gate line 14 extends in the horizontal direction at the center of the pixel, and the source line 16 extends in the vertical direction between the pixels, which are orthogonal to each other.
- the gate line 14 has a branch portion 14 a branched near a portion orthogonal to the source line 16, and the branch portion 14 a also overlaps the TFT semiconductor layer 12 with the gate insulating film 13 interposed therebetween.
- the gate line 14 and the TFT semiconductor layer 12 overlap each other at two positions including the branch part 14a of the gate line, and have a dual gate structure.
- the source line 16 is electrically connected to the TFT semiconductor layer 12 through a first contact hole 31 that is located in the upper right of the pixel and penetrates the first interlayer insulating film 15 and the gate insulating film 13. It is connected to the.
- the TFT semiconductor layer 12 extends linearly along the source line 16 and forms an overlapping portion (channel) with the gate line 14 and its branching portion 14a in the vicinity of the center of the right end of the pixel. Bend toward the center of the pixel at the position.
- the TFT semiconductor layer 12 is provided on the same level as the source line 16 by the second contact hole 32 that is located near the lower end of the pixel and on the right side and penetrates the gate insulating film 13 and the first interlayer insulating film 15.
- the island-shaped conductive portion 26 is electrically connected.
- the island-shaped conductive portion 26 is electrically connected to the pixel electrode 18 through a third contact hole 33 that penetrates the second interlayer insulating film 17.
- the TFT semiconductor layers of the odd-numbered pixels and the TFT semiconductor layers of the even-numbered pixels are integrated.
- the TFT semiconductor layers 12 of the pixels in the same column are connected to the common source line 16
- the TFT semiconductor layers of the odd-numbered pixels and the TFT semiconductor layers of the even-numbered pixels are integrated. Is possible.
- the TFT semiconductor layer 12 integrated with the middle pixel and the lower pixel in FIG. 1 extends upward from the first contact hole 31 and is an even number shown in the middle in FIG. 1.
- the storage capacitor wiring 24 is provided in the boundary region between the pixels in the odd rows shown in the upper stage in FIG. 1 and the pixels in the even rows shown in the middle stage in FIG.
- the first contact holes 31 are provided between even-numbered rows of pixels shown in the middle of FIG. 1 and odd-numbered rows of pixels shown in FIG. 1, thereby improving the aperture ratio. It has been.
- the counter electrodes 22a of the odd-numbered pixels and the counter electrodes 22b of the even-numbered pixels are arranged in parallel to each other along the extending direction of the storage capacitor wiring 24.
- both the counter electrodes may be arranged side by side in the extending direction of the storage capacitor wiring.
- the margin between the counter electrodes does not affect the wiring width of the storage capacitor line.
- the first contact hole 31 that penetrates the first interlayer insulating film 15 and the gate insulating film 13 and electrically connects the source line 16 and the TFT semiconductor layer 12 is one TFT.
- One semiconductor layer 12 is provided, but a plurality of TFT semiconductor layers may be provided. Thereby, the reliability of the electrical connection between the source line and each TFT semiconductor layer can be increased efficiently.
- FIG. 3 is a plan view schematically showing circuit configurations of pixels on the active matrix substrate by circuit symbols in the display device according to the first embodiment.
- the first embodiment will be described with reference to FIG. 3.
- the present embodiment relates to a configuration in which a storage capacitor wiring is provided in a boundary region between an odd-numbered row (Nth row) pixel and an even-numbered row (N + 1th row) pixel. Is.
- Nth row odd-numbered row
- N + 1th row even-numbered row
- G S L (N, N + 1) represents a storage capacitor line used for driving the pixels in the Nth and (N + 1) th rows
- GL (N) and GL (N + 1) are Nth
- SL (M), SL (M + 1) and SL (M + 2) are the Mth column, the (M + 1) th column, and the (M + 2) th column, respectively 2 represents a source line used for driving the pixel.
- FIG. 4 is a conceptual diagram illustrating 2H line inversion in the display device according to the first embodiment. Each + or ⁇ in FIG. 4 corresponds to one pixel and represents the polarity of the potential of the pixel electrode in the pixel.
- two rows of pixels sharing the storage capacitor line 24 are obtained by inverting the polarity of the potential of the pixel electrode for every two rows of pixels sharing the storage capacitor line 24. Since the voltages can be driven with the same polarity, the potential of the pixel electrodes 18 of the pixels in the two rows can be changed by changing the potential of the storage capacitor wiring 24. Therefore, capacitive coupling driving can be performed, the installation area of the storage capacitor wiring 24 can be reduced, and the aperture ratio can be improved. Further, the yield can be improved by simplifying the pattern of the storage capacitor wiring 24.
- a storage capacitor wiring is provided in the boundary region between the odd-numbered pixels and even-numbered pixels shown in FIG. 1, and the even-numbered (N + 1th) pixel and the next odd-numbered pixels
- a part of the optical sensor circuit may be formed as an additional circuit between the pixels in the row (N + 2nd row).
- the optical sensor circuit periodically repeats the cycle of (1) initialization, (2) sensing, and (3) reading.
- an additional circuit is provided in a space generated by changing the configuration in which one storage capacitor wiring is conventionally provided for two rows of pixels to one pixel for one row of pixels.
- the common additional circuit is arranged between the odd-numbered row pixels and the even-numbered row pixels where the storage capacitor wiring is not arranged, the aperture ratio is reduced by providing the additional circuit. It is suppressed.
- the counter electrode is positioned below the storage capacitor line, but may be positioned above the storage capacitor line.
- the counter electrode may be formed integrally with the pixel electrode. That is, by opening an interlayer insulating film in a region where a counter electrode is to be formed and forming a conductive film over the entire surface of the substrate, a pixel electrode on the interlayer insulating film and a counter electrode under the opening of the interlayer insulating film are formed.
- the conductive film can be integrally formed.
- the display mode may be a mode in which the pixel electrode and the common electrode are arranged on different substrates, such as a twisted nematic (TN) mode, a vertical alignment (VA) mode, and the like.
- the pixel electrode and the common electrode may be arranged on one substrate as in an in-plane-switching (IPS) mode.
- IPS in-plane-switching
- the liquid crystal display device may be any of a transmissive liquid crystal display device, a reflective liquid crystal display device, and a transflective liquid crystal display device.
- Substrate 12 TFT Semiconductor Layer 13 Gate Insulating Film 14 Gate Line 14a Branch 15 First Interlayer Insulating Film 16 Source Line 17 Second Interlayer Insulating Film 18 Pixel Electrode 19 Orientation Film 22 Counter Electrode 22a Counter Electrode of Pixels in Odd Row 22b Counter electrode 24 of pixels in even-numbered row 24 Retention capacitance wiring 26 Conductive portion 31 First contact hole 32 Second contact hole 33 Third contact hole
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Abstract
Description
本発明は、上記現状に鑑みてなされたものであり、保持容量配線を2行の画素で共用させて開口率の低下及び歩留まりの低下を充分に防止したうえで、容量結合駆動を行うことが可能な表示装置を提供することを目的とするものである。
Vpix= Vsl+Ccs/Cpix×ΔVcs
上記式中、Vpixは、画素電位である。Vslは、ソース信号電圧である。Vcsは、保持容量配線電圧である。Ccsは、保持容量である。Cpixは、画素容量(=保持容量+液晶容量+寄生容量)である。
本発明の表示装置は、容量結合駆動を行うことにより、従来駆動よりもVsl振幅を小さくすることができる。また、ドライバの制限からVsl振幅には限界があるため、容量結合駆動を行うことにより高電圧印加が可能となる。高電圧印加が可能となることで液晶パネルの透過率ひいては液晶パネルの輝度(表示性能)を向上させることができる。更に、保持容量配線の2本分割が必要なくなるため、この保持容量配線間リークで生じる歩留り低下を避けられることができ、このような歩留り向上によってコスト低減が可能となる。
言い換えれば、上記保持容量配線は、1本で2行の画素の保持容量を形成するといえ、従来1行の画素ごとに設けられていた保持容量配線を2行の画素ごとに設けることになる。したがって、上記保持容量配線は、平行に複数存在する奇数行の画素と偶数行の画素との境界領域に対し、1つおきに配置されることになる。したがって、保持容量配線が画素ごとに配置される表示装置と比較して、保持容量配線の設置面積を減らし、開口率の向上を図ることができる。また、保持容量配線の設置面積を減らすことに代えて、又は、保持容量配線の設置面積を減らすことに加えて、保持容量配線1本あたりの配線幅を広げれば電気抵抗を低減させることができ、クロストークの抑制等を図ることができる。更に、保持容量配線のパターンの簡素化による歩留り向上も可能となる。本発明は、容量結合駆動を行うことの利点に加えて、このような奇数行及び偶数行の画素で共用される保持容量配線を用いることの利点をも達成したものであるといえる。なお、本発明において、保持容量配線及び対向電極の少なくとも一方は、金属等の遮光性の導電材料から形成されるものであることが好ましい。また、上記保持容量配線は、奇数行の画素用の対向電極と、偶数行の画素用の対向電極とそれぞれ絶縁膜を挟んで対向することが好ましい。上記対向電極は、保持容量配線と対向する保持容量用電極をいう。
本実施形態の液晶表示装置は、n行m列(n及びmは、それぞれ2以上の整数を表す。)のマトリクス状に配列された画素と、格子状に設けられたm本のソースライン及びn本のゲートラインとを有する表示装置である。
本実施形態の液晶表示装置における画素の駆動制御は、薄膜トランジスタ(TFT)、画素電極が画素ごとにマトリクス状に配置されたアクティブマトリクス基板において行われる。図1は、実施形態1の表示装置においてアクティブマトリクス基板上の画素の回路構成を示す平面模式図である。図2は、図1のA-B線に沿った切断面の構成を示す断面模式図である。
図3を用いて実施形態1を説明すると、本実施形態は、奇数行(N行目)の画素と偶数行 (N+1行目)の画素との境界領域に保持容量配線が設けられた形態に関するものである。図3中、GSL(N,N+1)は、第N行及び第(N+1)行の画素の駆動に用いられる保持容量配線を表し、GL(N)、 GL(N+1)は、それぞれ第N行、第(N+1)行の画素の駆動に用いられるゲートラインを表し、SL(M)、SL(M+1)、SL(M+2)はそれぞれ 第M列、第(M+1)列、第(M+2)列の画素の駆動に用いられるソースラインを表している。
図4は、実施形態1の表示装置における2Hライン反転を示す概念図である。図4中の1つの+又は-は、それぞれ1つの画素に対応し、当該画素における画素電極の電位の極性を表す。
12 TFT半導体層
13 ゲート絶縁膜
14 ゲートライン
14a 分岐部
15 第一の層間絶縁膜
16 ソースライン
17 第二の層間絶縁膜
18 画素電極
19 配向膜
22 対向電極
22a 奇数行の画素の対向電極
22b 偶数行の画素の対向電極
24 保持容量配線
26 導電部
31 第一のコンタクトホール
32 第二のコンタクトホール
33 第三のコンタクトホール
Claims (4)
- n行m列(n及びmは、それぞれ2以上の整数を表す。)のマトリクス状に配列された画素と、格子状に設けられたm本のソースライン及びn本のゲートラインとを有する表示装置であって、
該表示装置は、奇数行の画素と偶数行の画素との境界領域に保持容量部を有し、
該保持容量部は、奇数行及び偶数行の画素で共用される保持容量配線、絶縁膜、奇数行の画素用の対向電極、及び、偶数行の画素用の対向電極を有し、
該奇数行の画素には、該奇数行の画素用の対向電極に電気的に接続された画素電極が設けられ、
該偶数行の画素には、該偶数行の画素用の対向電極に電気的に接続された画素電極が設けられ、
該保持容量配線を共用している2行の画素ごとに、画素電極の電位の極性を反転させ、かつ、
該保持容量配線の電位を変化させることにより、該2行の画素の画素電極の電位を変化させる容量結合駆動を行うことを特徴とする表示装置。 - 前記表示装置は、奇数行の画素と偶数行の画素とが互いに反転した構成を有することを特徴とする請求項1に記載の表示装置。
- 前記表示装置は、保持容量配線が配置されていない奇数行の画素と偶数行の画素との間に共通の付加回路を有することを特徴とする請求項1又は2に記載の表示装置。
- 前記付加回路は、光センサー用回路であることを特徴とする請求項3に記載の表示装置。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/498,587 US20120188212A1 (en) | 2009-10-20 | 2010-06-04 | Display apparatus |
| EP10824695.0A EP2492741A4 (en) | 2009-10-20 | 2010-06-04 | DISPLAY DEVICE |
| CN2010800469885A CN102576162A (zh) | 2009-10-20 | 2010-06-04 | 显示装置 |
| JP2011537163A JP5330535B2 (ja) | 2009-10-20 | 2010-06-04 | 表示装置 |
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| JP2009-241320 | 2009-10-20 | ||
| JP2009241320 | 2009-10-20 |
Publications (1)
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| WO2011048843A1 true WO2011048843A1 (ja) | 2011-04-28 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/JP2010/059535 Ceased WO2011048843A1 (ja) | 2009-10-20 | 2010-06-04 | 表示装置 |
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| Country | Link |
|---|---|
| US (1) | US20120188212A1 (ja) |
| EP (1) | EP2492741A4 (ja) |
| JP (1) | JP5330535B2 (ja) |
| CN (1) | CN102576162A (ja) |
| WO (1) | WO2011048843A1 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018049292A (ja) * | 2017-12-01 | 2018-03-29 | 株式会社ジャパンディスプレイ | 表示装置 |
| US10268088B2 (en) | 2013-10-18 | 2019-04-23 | Japan Display Inc. | Display device |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2669214B1 (en) | 2009-07-09 | 2016-01-20 | Advanced Technology Materials, Inc. | Storage system with a blow molded collapsible liner |
| EP2643094A4 (en) | 2010-11-23 | 2017-05-24 | Advanced Technology Materials, Inc. | Liner-based dispenser |
| US9211993B2 (en) | 2011-03-01 | 2015-12-15 | Advanced Technology Materials, Inc. | Nested blow molded liner and overpack and methods of making same |
| CN103886826B (zh) * | 2012-12-21 | 2018-08-07 | 上海天马微电子有限公司 | 一种有机发光二极管显示阵列 |
| CN104103646A (zh) * | 2014-06-30 | 2014-10-15 | 京东方科技集团股份有限公司 | 一种低温多晶硅薄膜晶体管阵列基板及其制备方法、显示装置 |
| CN104766588B (zh) * | 2015-05-08 | 2017-07-28 | 京东方科技集团股份有限公司 | 一种显示面板的驱动方法、显示装置 |
| CN115708011B (zh) | 2021-08-19 | 2024-06-11 | 北京京东方技术开发有限公司 | 一种显示基板及其制备方法、显示装置 |
| WO2024050687A1 (zh) | 2022-09-06 | 2024-03-14 | 京东方科技集团股份有限公司 | 显示基板、显示面板和显示装置 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0876086A (ja) * | 1994-08-31 | 1996-03-22 | Toshiba Corp | 液晶表示装置 |
| JPH1039277A (ja) | 1996-07-26 | 1998-02-13 | Matsushita Electric Ind Co Ltd | 液晶表示装置およびその駆動方法 |
| JP2001083943A (ja) | 1999-09-09 | 2001-03-30 | Matsushita Electric Ind Co Ltd | 液晶表示装置及び駆動方法 |
| JP2004354742A (ja) * | 2003-05-29 | 2004-12-16 | Toshiba Matsushita Display Technology Co Ltd | 液晶表示装置、液晶表示装置の駆動方法および製造方法 |
| WO2009041112A1 (ja) | 2007-09-27 | 2009-04-02 | Sharp Kabushiki Kaisha | 表示装置 |
| JP2009241320A (ja) | 2008-03-29 | 2009-10-22 | Brother Ind Ltd | 着脱体の認識装置及び着脱体 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4342200B2 (ja) * | 2002-06-06 | 2009-10-14 | シャープ株式会社 | 液晶表示装置 |
| JP4050100B2 (ja) * | 2002-06-19 | 2008-02-20 | シャープ株式会社 | アクティブマトリクス基板および表示装置 |
| CN1300753C (zh) * | 2003-02-10 | 2007-02-14 | 三洋电机株式会社 | 动态矩阵型显示装置 |
| JP4217196B2 (ja) * | 2003-11-06 | 2009-01-28 | インターナショナル・ビジネス・マシーンズ・コーポレーション | ディスプレイ駆動装置、画像表示システム、および表示方法 |
| TWI336805B (en) * | 2006-12-07 | 2011-02-01 | Chimei Innolux Corp | Liquid crystal display device and driving method thereof |
| JP5391519B2 (ja) * | 2007-02-06 | 2014-01-15 | 三菱電機株式会社 | 画像表示装置 |
-
2010
- 2010-06-04 EP EP10824695.0A patent/EP2492741A4/en not_active Withdrawn
- 2010-06-04 CN CN2010800469885A patent/CN102576162A/zh active Pending
- 2010-06-04 JP JP2011537163A patent/JP5330535B2/ja not_active Expired - Fee Related
- 2010-06-04 US US13/498,587 patent/US20120188212A1/en not_active Abandoned
- 2010-06-04 WO PCT/JP2010/059535 patent/WO2011048843A1/ja not_active Ceased
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0876086A (ja) * | 1994-08-31 | 1996-03-22 | Toshiba Corp | 液晶表示装置 |
| JPH1039277A (ja) | 1996-07-26 | 1998-02-13 | Matsushita Electric Ind Co Ltd | 液晶表示装置およびその駆動方法 |
| JP2001083943A (ja) | 1999-09-09 | 2001-03-30 | Matsushita Electric Ind Co Ltd | 液晶表示装置及び駆動方法 |
| JP2004354742A (ja) * | 2003-05-29 | 2004-12-16 | Toshiba Matsushita Display Technology Co Ltd | 液晶表示装置、液晶表示装置の駆動方法および製造方法 |
| WO2009041112A1 (ja) | 2007-09-27 | 2009-04-02 | Sharp Kabushiki Kaisha | 表示装置 |
| JP2009241320A (ja) | 2008-03-29 | 2009-10-22 | Brother Ind Ltd | 着脱体の認識装置及び着脱体 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP2492741A4 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10268088B2 (en) | 2013-10-18 | 2019-04-23 | Japan Display Inc. | Display device |
| JP2018049292A (ja) * | 2017-12-01 | 2018-03-29 | 株式会社ジャパンディスプレイ | 表示装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20120188212A1 (en) | 2012-07-26 |
| CN102576162A (zh) | 2012-07-11 |
| EP2492741A4 (en) | 2013-09-04 |
| EP2492741A1 (en) | 2012-08-29 |
| JPWO2011048843A1 (ja) | 2013-03-07 |
| JP5330535B2 (ja) | 2013-10-30 |
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