JP2009211531A - Display device - Google Patents

Display device Download PDF

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Publication number
JP2009211531A
JP2009211531A JP2008055285A JP2008055285A JP2009211531A JP 2009211531 A JP2009211531 A JP 2009211531A JP 2008055285 A JP2008055285 A JP 2008055285A JP 2008055285 A JP2008055285 A JP 2008055285A JP 2009211531 A JP2009211531 A JP 2009211531A
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JP
Japan
Prior art keywords
display device
layer
detection
liquid crystal
electrode
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP2008055285A
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Japanese (ja)
Inventor
Masayoshi Fuchi
Hiroyoshi Hayashi
Takayuki Imai
Hiroyoshi Nakamura
Taku Nakamura
Masahiro Tada
卓 中村
弘喜 中村
貴之 今井
正浩 多田
宏宜 林
正芳 淵
Original Assignee
Toshiba Mobile Display Co Ltd
東芝モバイルディスプレイ株式会社
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.)
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Publication date
Application filed by Toshiba Mobile Display Co Ltd, 東芝モバイルディスプレイ株式会社 filed Critical Toshiba Mobile Display Co Ltd
Priority to JP2008055285A priority Critical patent/JP2009211531A/en
Publication of JP2009211531A publication Critical patent/JP2009211531A/en
Application status is Pending legal-status Critical

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a capacitive thin and lightweight display device having a contact coordinate detection function. <P>SOLUTION: An X detection electrode layer 21 and a Y detection electrode layer 23 with detection electrodes for detecting capacitance arranged therein are integrated into a BM layer 20. Thus, it is not required to mount a touch panel part on a liquid crystal display device, so that the liquid crystal display device is made thin and lightweight. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a display device having a capacitive coordinate detection function.

  The touch panel is an input device that is configured to be integrated with a display device and detects contact coordinates at which an object such as a fingertip contacts the screen of the display device. There are various types of touch panels, and an electrostatic capacity method is known as one of the operation methods (see, for example, Patent Document 1). The capacitive touch panel calculates the contact coordinates by detecting the capacitance formed when the user touches the screen.

  FIG. 6 is a cross-sectional view illustrating a configuration of a liquid crystal display device on which a conventional capacitive touch panel is mounted. The liquid crystal display device shown in the figure is obtained by bonding the liquid crystal display device 100 and the touch panel unit 200 with an adhesive layer 205.

  The liquid crystal display device 100 has a configuration in which a liquid crystal layer 106 is sandwiched between a glass array substrate 108 and a counter substrate 102. On the array substrate 108, a plurality of signal lines and scanning lines are wired in a matrix, and a switching element is disposed at each intersection. A pixel electrode 107 is connected to each of the switching elements. On the counter substrate 102, a BM layer 103, a color filter layer 104, and a counter electrode 105 are formed. The color filter layer 104 is colored red, green, and blue for each pixel. The BM layer 103 is made of a black resin or a metal such as chromium so as to block light, and is arranged so as to partition each pixel. The BM layer 103 and the color filter layer 104 are collectively referred to as a color filter. A counter electrode 105 is formed on the entire surface of the counter substrate 102 on the color filter. Polarizing plates 101 and 109 are disposed outside the counter substrate 102 and the array substrate 108, respectively.

On the other hand, the touch panel unit 200 is formed by forming transparent electrodes 202 and 204 for detecting electrostatic capacity on a glass substrate 201. The transparent electrode 202 detects a capacitance in the X-axis (lateral) direction of the contact coordinates, and the transparent electrode 204 detects a capacitance in the Y-axis (vertical) direction of the contact coordinates. An insulating film 203 is formed between the transparent electrodes 202 and 204.
JP 2007-304342 A

  However, the configuration in which the touch panel unit 200 is mounted on the conventional liquid crystal display device 100 has a problem that the thickness of the entire display device increases. In Patent Document 1, the counter electrode is commonly used as an electrode for detecting capacitance, thereby reducing the thickness and weight.

  The present invention has been made in view of the above, and an object of the present invention is to reduce the thickness and weight of a liquid crystal display device having a capacitive coordinate detection function.

  The display device according to the present invention includes a counter substrate having a light shielding layer surrounding each pixel, and calculates a contact coordinate of the dielectric by detecting a capacitance formed when the dielectric contacts the counter substrate. A display device having a function of detecting a capacitance, wherein a detection electrode for detecting capacitance is integrated with a light shielding layer.

  In the present invention, it is possible to reduce the thickness and weight of a display device having a contact coordinate detection function by integrating a detection electrode for detecting capacitance with a light shielding layer of a counter substrate. Become.

  In the above display device, the detection electrode is a plurality of detection electrodes orthogonal to each other with an insulating layer interposed therebetween, and each of the detection electrodes has a grid-like node.

  In the present invention, by providing the detection electrode with a grid-like node surrounding the pixel, electrostatic coupling with a dielectric such as a finger is facilitated without blocking the opening of the pixel.

  According to the present invention, it is possible to reduce the thickness and weight of a liquid crystal display device having a capacitive coordinate detection function.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view illustrating a configuration of a liquid crystal display device according to the present embodiment. The liquid crystal display device shown in the figure has a function of calculating contact coordinates where a dielectric such as a finger contacts the display screen, and the liquid crystal layer 15 is sandwiched between the glass array substrate 17 and the counter substrate 12. It is a configuration.

  On the array substrate 17, a plurality of signal lines (not shown) and a plurality of scanning lines (not shown) are wired in a matrix, and switching elements (not shown) are arranged at each intersection. A pixel electrode 16 is connected to each of the switching elements.

  On the counter substrate 12, a BM (Black Matrix) layer 20, a color filter layer 13, and a counter electrode 14 are formed. The BM layer 20 includes four layers of an X detection electrode layer 21, an insulating layer 22, a Y detection electrode layer 23, and a resin layer 24. X and Y detection electrodes are disposed on the X detection electrode layer 21 and the Y detection electrode layer 23. The contact position of the finger is calculated by detecting the capacitance formed between the X and Y detection electrodes and the finger in contact with the display screen. The arrangement of the X and Y detection electrodes will be described later. The resin layer 24 is formed of an insulator such as a black resin and surrounds each pixel. As shown in FIG. 2, the color filter layer 13 is colored with red, green, and blue for each pixel to perform color display. The BM layer 20 is disposed so as to partition the pixels 13R, 13G, and 13B.

  The polarizing plates 11 and 18 are arranged outside the counter substrate 12 and the array substrate 17 so that their polarization directions are orthogonal to each other. The video signal applied to the signal line is written into the pixel electrode 16 when the switching element is turned on by the scanning signal of the scanning line. The light passing through the liquid crystal layer 15 is controlled by the electric field between the pixel electrode 16 and the counter electrode 14, and the color filter layer 13 is colored to output an image.

  Next, the arrangement of the BM layer detection electrodes will be described. A plurality of detection electrodes are disposed on the X detection electrode layer 21 and the Y detection electrode layer 23 so as to cross each other. The detection electrode is integrated with the BM layer using a metal used as a black matrix.

  FIG. 3 is a schematic diagram showing the arrangement of electrodes in the X detection electrode layer 21 and the Y detection electrode layer 23. As shown in the figure, in the X detection electrode layer 21, X detection electrodes 22 </ b> A and 22 </ b> B for detecting the position in the X direction (lateral direction) where the finger contacts are arranged in the vertical direction. On the other hand, in the Y detection electrode layer 23, Y detection electrodes 24A, 24B, and 24C for detecting the position in the Y direction (vertical direction) where the finger contacts are arranged in the horizontal direction. In addition, the X detection electrodes 22A and 22B include lattice-like nodes between the Y detection electrodes 24A, 24B, and 24C that are arranged to intersect each other. Similarly, the Y detection electrodes 24A, 24B, and 24C also include grid-like nodes between the X detection electrodes 22A and 22B that are arranged to cross each other. Thus, by providing the detection electrode with a grid-like node surrounding the pixel, the capacitive coupling between the detection electrode and the finger is facilitated without blocking the opening of the pixel.

  A detection circuit (not shown) is connected to the X detection electrodes 22A, 22B and the Y detection electrodes 24A, 24B, 24C. The detection circuit detects a change in capacitance in each of the X detection electrodes 22A and 22B and the Y detection electrodes 24A, 24B, and 24C. When a dielectric such as a finger contacts the screen of the display device, a capacitance is formed between the dielectric that contacts the screen and the detection electrode. The detection circuit detects the capacitance and calculates the position where the finger touches.

  4 and 5 are schematic views showing the arrangement of other electrodes in the X detection electrode layer 21 and the Y detection electrode layer 23. FIG. The detection electrodes shown in FIGS. 4 and 5 have grid-like nodes larger than those shown in FIG. The configuration of the detection electrode is not limited to that shown here.

  Therefore, according to the present embodiment, the X detection electrode layer 21 and the Y detection electrode layer 23 in which the detection electrodes for detecting the capacitance are arranged are integrated with the BM layer 20, whereby the touch panel portion is displayed on the liquid crystal display. Since it is no longer necessary to place it on the device, the liquid crystal display device can be reduced in thickness and weight.

It is sectional drawing which shows the structure of the liquid crystal display device in one embodiment. It is a top view which shows a part of pixel of the display part of the said liquid crystal display device. It is the schematic which shows arrangement | positioning of the electrode for a detection in the said liquid crystal display device. It is the schematic which shows arrangement | positioning of another electrode for a detection in the said liquid crystal display device. It is the schematic which shows arrangement | positioning of another detection electrode in the said liquid crystal display device. It is sectional drawing which shows the structure of the liquid crystal display device provided with the conventional touchscreen function.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11, 18 ... Polarizing plate 12 ... Counter substrate 13 ... Color filter layer 14 ... Counter electrode 15 ... Liquid crystal layer 16 ... Pixel electrode 17 ... Array substrate 20 ... BM layer 21 ... X detection electrode layer 22 ... Insulating layer 23 ... Y detection electrode Layer 24 ... Resin layer 100 ... Liquid crystal display device 101, 109 ... Polarizing plate 102 ... Counter substrate 103 ... BM layer 104 ... Color filter layer 105 ... Counter electrode 106 ... Liquid crystal layer 107 ... Pixel electrode 108 ... Array substrate 200 ... Touch panel unit 201 ... Glass substrate 202 ... Transparent electrode 202,204 ... Transparent electrode 203 ... Insulating film 204 ... Transparent electrode 205 ... Adhesive layer

Claims (2)

  1. A display device comprising a counter substrate having a light shielding layer surrounding each pixel and having a function of calculating a contact coordinate of the dielectric by detecting a capacitance formed when the dielectric contacts the counter substrate Because
    A display device, wherein a detection electrode for detecting the capacitance is integrated with the light shielding layer.
  2.   The display device according to claim 1, wherein the detection electrodes are a plurality of detection electrodes orthogonal to each other with an insulating layer in between, and each of the detection electrodes has a grid-like node.
JP2008055285A 2008-03-05 2008-03-05 Display device Pending JP2009211531A (en)

Priority Applications (1)

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JP2008055285A JP2009211531A (en) 2008-03-05 2008-03-05 Display device

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Application Number Priority Date Filing Date Title
JP2008055285A JP2009211531A (en) 2008-03-05 2008-03-05 Display device

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JP2011075809A (en) * 2009-09-30 2011-04-14 Toppan Printing Co Ltd Liquid crystal display panel
JP2011134311A (en) * 2009-11-24 2011-07-07 Fujifilm Corp Conductive sheet, method of using conductive sheet, and capacitive touch panel
JP2011253263A (en) * 2010-05-31 2011-12-15 Fujifilm Corp Touch panel and conductive sheet
JP2012033147A (en) * 2010-07-05 2012-02-16 Fujifilm Corp Touch panel and conductive sheet
JP2012053644A (en) * 2010-08-31 2012-03-15 Fujifilm Corp Conductive sheet, method for using conductive sheet and capacitance system touch panel
JP2013015614A (en) * 2011-07-01 2013-01-24 Toppan Printing Co Ltd Color filter with touch panel wiring
JP2013045100A (en) * 2011-08-19 2013-03-04 Samsung Electro-Mechanics Co Ltd Color filter substrate provided with touch sensor and method for manufacturing the same
CN103034366A (en) * 2012-12-21 2013-04-10 北京京东方光电科技有限公司 Display substrate manufacturing method, black matrix, display substrate and display device
CN103677399A (en) * 2012-09-11 2014-03-26 三星显示有限公司 Sensor substrate, method of manufacturing the same and sensing display panel having the same
WO2014125539A1 (en) * 2013-02-12 2014-08-21 ソニー株式会社 Sensor device, input device, and electronic apparatus
CN104090678A (en) * 2014-06-27 2014-10-08 京东方科技集团股份有限公司 Array substrate, display device and drive method of display device
JP2014531640A (en) * 2011-09-09 2014-11-27 北京京東方光電科技有限公司 Color filter substrate and capacitor type touch screen
JP2014232530A (en) * 2013-05-28 2014-12-11 三星ディスプレイ株式會社Samsung Display Co.,Ltd. Display device
KR101496365B1 (en) * 2012-05-22 2015-02-26 수퍼씨-터치 코퍼레이션 In-Cell Touch Display Panel Structure With metal layer for sensing
JP2015075991A (en) * 2013-10-10 2015-04-20 株式会社ジャパンディスプレイ Liquid crystal display device including touch panel function
US9256097B2 (en) 2013-04-19 2016-02-09 Samsung Display Co., Ltd. Display apparatuses
EP2568366A3 (en) * 2011-09-07 2016-04-13 TPK Touch Solutions (Xiamen) Inc. Touch sensing electrode and touch panel using the same
EP2639678A3 (en) * 2012-03-13 2016-08-10 SuperC-Touch Corporation In-cell touch display panel structure
EP3133478A1 (en) * 2009-11-20 2017-02-22 FUJIFILM Corporation Conductive sheet, method for using conductive sheet, and capacitive touch panel
US9811226B2 (en) 2013-09-10 2017-11-07 Sony Corporation Sensor device, input device, and electronic apparatus
US10013121B2 (en) 2014-01-28 2018-07-03 Boe Technology Group Co., Ltd. In-cell touch panel and display device with self-capacitance electrodes
US10055067B2 (en) 2013-03-18 2018-08-21 Sony Corporation Sensor device, input device, and electronic apparatus
US10282041B2 (en) 2014-03-28 2019-05-07 Sony Corporation Sensor device, input device, and electronic apparatus

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011075809A (en) * 2009-09-30 2011-04-14 Toppan Printing Co Ltd Liquid crystal display panel
KR101758604B1 (en) 2009-11-20 2017-07-17 후지필름 가부시키가이샤 Conductive sheet, method for using conductive sheet, and capacitive touch panel
EP3133478A1 (en) * 2009-11-20 2017-02-22 FUJIFILM Corporation Conductive sheet, method for using conductive sheet, and capacitive touch panel
US9439283B2 (en) 2009-11-24 2016-09-06 Fujifilm Corporation Conductive sheet
JP2011134311A (en) * 2009-11-24 2011-07-07 Fujifilm Corp Conductive sheet, method of using conductive sheet, and capacitive touch panel
EP2506127A4 (en) * 2009-11-24 2015-12-09 Fujifilm Corp Conductive sheet, usage method of conductive sheet and capacitive type touch panel
US9996203B2 (en) 2009-11-24 2018-06-12 Fujifilm Corporation Conductive sheet and usage method of conductive sheet
JP2011253263A (en) * 2010-05-31 2011-12-15 Fujifilm Corp Touch panel and conductive sheet
JP2012033147A (en) * 2010-07-05 2012-02-16 Fujifilm Corp Touch panel and conductive sheet
JP2012053644A (en) * 2010-08-31 2012-03-15 Fujifilm Corp Conductive sheet, method for using conductive sheet and capacitance system touch panel
JP2013015614A (en) * 2011-07-01 2013-01-24 Toppan Printing Co Ltd Color filter with touch panel wiring
JP2013045100A (en) * 2011-08-19 2013-03-04 Samsung Electro-Mechanics Co Ltd Color filter substrate provided with touch sensor and method for manufacturing the same
EP2568366A3 (en) * 2011-09-07 2016-04-13 TPK Touch Solutions (Xiamen) Inc. Touch sensing electrode and touch panel using the same
JP2014531640A (en) * 2011-09-09 2014-11-27 北京京東方光電科技有限公司 Color filter substrate and capacitor type touch screen
EP2639678A3 (en) * 2012-03-13 2016-08-10 SuperC-Touch Corporation In-cell touch display panel structure
KR101496365B1 (en) * 2012-05-22 2015-02-26 수퍼씨-터치 코퍼레이션 In-Cell Touch Display Panel Structure With metal layer for sensing
CN103677399A (en) * 2012-09-11 2014-03-26 三星显示有限公司 Sensor substrate, method of manufacturing the same and sensing display panel having the same
JP2014056564A (en) * 2012-09-11 2014-03-27 Samsung Display Co Ltd Sensor substrate, manufacturing method of the same and sensing display panel including the same
CN103677399B (en) * 2012-09-11 2019-05-10 三星显示有限公司 Sensor base plate and its manufacturing method and sensing display panel with it
CN103034366A (en) * 2012-12-21 2013-04-10 北京京东方光电科技有限公司 Display substrate manufacturing method, black matrix, display substrate and display device
CN103034366B (en) * 2012-12-21 2016-08-31 北京京东方光电科技有限公司 A kind of display base plate preparation method and black matrix, display base plate, display device
WO2014125539A1 (en) * 2013-02-12 2014-08-21 ソニー株式会社 Sensor device, input device, and electronic apparatus
US9785297B2 (en) 2013-02-12 2017-10-10 Sony Corporation Sensor device, input device, and electronic apparatus
JP2014179062A (en) * 2013-02-12 2014-09-25 Sony Corp Sensor device, input device and electronic apparatus
US10055067B2 (en) 2013-03-18 2018-08-21 Sony Corporation Sensor device, input device, and electronic apparatus
US9256097B2 (en) 2013-04-19 2016-02-09 Samsung Display Co., Ltd. Display apparatuses
JP2014232530A (en) * 2013-05-28 2014-12-11 三星ディスプレイ株式會社Samsung Display Co.,Ltd. Display device
US9811226B2 (en) 2013-09-10 2017-11-07 Sony Corporation Sensor device, input device, and electronic apparatus
JP2015075991A (en) * 2013-10-10 2015-04-20 株式会社ジャパンディスプレイ Liquid crystal display device including touch panel function
US10013121B2 (en) 2014-01-28 2018-07-03 Boe Technology Group Co., Ltd. In-cell touch panel and display device with self-capacitance electrodes
US10282041B2 (en) 2014-03-28 2019-05-07 Sony Corporation Sensor device, input device, and electronic apparatus
WO2015196622A1 (en) * 2014-06-27 2015-12-30 京东方科技集团股份有限公司 Array substrate, display apparatus and driving method therefor
CN104090678A (en) * 2014-06-27 2014-10-08 京东方科技集团股份有限公司 Array substrate, display device and drive method of display device

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