TW201441883A - In-cell touch display device - Google Patents
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Abstract
Description
本發明是涉及一種內嵌式觸控顯示裝置。The invention relates to an in-cell touch display device.
由於觸控裝置具有人機互動的特性，已被廣泛應用於儀器的外部輸入介面上，包括行動電話（mobile phone）、衛星導航系統（GPS navigator system）、個人數位助理（personal digital assistant, PDA）以及便攜式電腦等。依據觸控裝置與顯示器的結合位置，觸控顯示裝置包括外掛式觸控顯示裝置與內嵌式觸控顯示裝置。由於內嵌式觸控顯示裝置可減小整體觸控裝置的厚度而廣泛應用，然為進一步減小觸控顯示裝置的厚度，在現有設計中使用有顯示電極作為觸控感測電極的方案，顯示電極需要分時具有顯示功能與觸控功能而如何實現觸控功能與顯示功能的切換成為業界研究的重要課題之一。Due to the human-computer interaction characteristics of touch devices, they have been widely used in the external input interface of instruments, including mobile phones, GPS navigator systems, and personal digital assistants (PDAs). And laptops, etc. According to the combined position of the touch device and the display, the touch display device comprises an external touch display device and an in-cell touch display device. Since the in-cell touch display device can be widely used to reduce the thickness of the entire touch device, in order to further reduce the thickness of the touch display device, a display electrode is used as a touch sensing electrode in the prior design. The display electrode needs to have a display function and a touch function in a time-sharing manner, and how to realize the switching between the touch function and the display function has become one of the important research topics in the industry.
有鑑於此，有必要提供一種實現控制公共電極觸控功能與顯示功能切換的內嵌式觸控顯示裝置。In view of the above, it is necessary to provide an in-cell touch display device that realizes control of the touch function of the common electrode and the switching of the display function.
本發明提供一種內嵌式觸控顯示裝置，其包括：The present invention provides an in-cell touch display device, which includes:
一上基板，An upper substrate,
一與該上基板相對設置的下基板；a lower substrate disposed opposite the upper substrate;
一顯示電極；a display electrode;
一導電膜，設置於該上基板的表面，且該導電膜經由一控制開關接地。A conductive film is disposed on a surface of the upper substrate, and the conductive film is grounded via a control switch.
當該導電膜處於懸浮狀態時，觸控掃描信號開始輸入該內嵌式觸控顯示裝置，對顯示電極進行掃描，並偵測顯示電極上掃描信號的變化以判定觸控位置；當該導電膜接地時，觸控掃描信號停止對顯示電極進行掃描，該顯示電極接收資料驅動訊號以顯示畫面。When the conductive film is in a floating state, the touch scan signal starts to be input into the in-cell touch display device, scans the display electrode, and detects a change of the scan signal on the display electrode to determine the touch position; when the conductive film When grounded, the touch scan signal stops scanning the display electrode, and the display electrode receives the data drive signal to display the picture.
相較於先前技術，本發明的觸控感測層藉由導電膜所處狀態來實現控制公共電極的驅動時序以實現觸控功能與顯示功能的切換。Compared with the prior art, the touch sensing layer of the present invention realizes the driving timing of controlling the common electrode by the state of the conductive film to realize the switching between the touch function and the display function.
10．．．內嵌式觸控顯示裝置10. . . In-cell touch display device
11．．．上基板11. . . Upper substrate
12．．．下基板12. . . Lower substrate
122．．．公共電極層122. . . Common electrode layer
1221．．．公共電極1221. . . Common electrode
123．．．絕緣層123. . . Insulation
124．．．畫素電極層124. . . Pixel electrode layer
1241．．．畫素電極1241. . . Pixel electrode
126．．．連接墊126. . . Connection pad
13．．．液晶層13. . . Liquid crystal layer
132．．．液晶分子132. . . Liquid crystal molecule
14．．．導電膜14. . . Conductive film
15．．．軟性電路板15. . . Flexible circuit board
17．．．開關17. . . switch
18．．．控制晶片18. . . Control chip
20．．．觸控感測層20. . . Touch sensing layer
圖1為本發明內嵌式觸控顯示裝置的一較佳實施方式的剖視圖。1 is a cross-sectional view of a preferred embodiment of an in-cell touch display device of the present invention.
圖2為圖1所示的內嵌式觸控顯示裝置的導電膜的俯視示意圖。2 is a top plan view of a conductive film of the in-cell touch display device shown in FIG. 1 .
圖3為圖1所示的內嵌式觸控顯示裝置進行觸控感測的時序控制示意圖。3 is a schematic diagram of timing control of the touch sensing device of the in-cell touch display device shown in FIG. 1 .
在本發明中，顯示裝置為一內嵌式觸控顯示裝置，該內嵌式觸控顯示裝置包括相對設置的上基板與下基板，及密封二基板的封膠，該二基板及封膠構成一封閉空間用於封裝該顯示裝置用於實現顯示的面板結構及用於實現觸控功能的內嵌式觸控結構。進一步地，該內嵌式觸控顯示裝置的面板結構與觸控結構共用一電極結構，也就是說，該面板結構中驅動顯示用的顯示電極，如公共電極、畫素電極同時作為觸控結構的感應電極。該上基板的表面還鋪設有一導電膜，該導電膜作為一控制電極，經由一控制開關接地。在該導電膜處於懸浮狀態的時段內，觸控掃描信號開始輸入該顯示裝置，對觸控電極進行掃描，並偵測觸控電極上掃描信號的變化判定觸控位置，實現觸控功能。而在導電膜接地的時段內，觸控掃描信號停止對觸控電極進行掃描。優選地，該顯示裝置可為一內嵌觸控式平面旋轉(in-plane switching，IPS)型液晶顯示裝置，該導電膜可由IPS型顯示器中常用的用於靜電屏蔽的ITO導電膜同時充當。為便於理解，下面將結合圖式以公共電極共用的內嵌觸控式IPS型液晶顯示裝置為例對本發明作進一步之詳細說明。In the present invention, the display device is an in-cell touch display device, and the in-cell touch display device includes an upper substrate and a lower substrate disposed opposite to each other, and a sealant for sealing the two substrates, and the two substrates and the sealant are formed. A closed space is used for encapsulating the panel structure of the display device for realizing display and the in-cell touch structure for implementing the touch function. Further, the panel structure of the in-cell touch display device and the touch structure share an electrode structure, that is, the display electrodes for driving display in the panel structure, such as a common electrode and a pixel electrode, simultaneously serve as a touch structure. Induction electrode. A conductive film is also disposed on the surface of the upper substrate, and the conductive film acts as a control electrode and is grounded via a control switch. During the period in which the conductive film is in a floating state, the touch scan signal is input into the display device, the touch electrode is scanned, and the change of the scan signal on the touch electrode is detected to determine the touch position, thereby implementing the touch function. While the conductive film is grounded, the touch scan signal stops scanning the touch electrode. Preferably, the display device can be an in-plane switching (IPS) type liquid crystal display device, and the conductive film can be simultaneously used as an ITO conductive film for electrostatic shielding commonly used in IPS type displays. For ease of understanding, the present invention will be further described in detail below by taking an in-cell touch IPS type liquid crystal display device shared by a common electrode as an example.
請一併參閱圖1、圖2，圖1為本發明的內嵌式觸控顯示裝置的一較佳實施方式的剖視圖；圖2為圖1所示的內嵌式觸控顯示裝置的導電膜的俯視示意圖。該內嵌式觸控顯示裝置10包括一上基板11、一下基板12，該上基板11與該下基板12相對設置。該上基板11與該下基板12之間設置液晶層13。該上基板11遠離該液晶層13一側設置導電膜14。該液晶層13包括複數液晶分子132。本實施方式中，該上基板11為彩色濾光片基板，該下基板12上製造薄膜電晶體陣列作為薄膜電晶體基板。優選地，該導電膜14為氧化銦錫（Indium Tin Oxides，ITO）薄膜。1 and FIG. 2, FIG. 1 is a cross-sectional view of a preferred embodiment of the in-cell touch display device of the present invention; FIG. 2 is a conductive film of the in-cell touch display device of FIG. A schematic view of the top. The in-cell touch display device 10 includes an upper substrate 11 and a lower substrate 12 , and the upper substrate 11 is disposed opposite to the lower substrate 12 . A liquid crystal layer 13 is provided between the upper substrate 11 and the lower substrate 12. The upper substrate 11 is provided with a conductive film 14 away from the liquid crystal layer 13 side. The liquid crystal layer 13 includes a plurality of liquid crystal molecules 132. In the present embodiment, the upper substrate 11 is a color filter substrate, and a thin film transistor array is fabricated on the lower substrate 12 as a thin film transistor substrate. Preferably, the conductive film 14 is an Indium Tin Oxides (ITO) film.
該下基板12鄰近該液晶層13的一側依次設置公共電極層122、絕緣層123及畫素電極層124。該公共電極層122與該畫素電極層124用於產生基本平行於該下基板12的電場來驅動該液晶層13的液晶分子132旋轉。該公共電極層122包括複數公共電極1221，該畫素電極層124包括複數畫素電極1241。在本實施例中，該公共電極層122同時作為觸控感測層20使用。The common substrate layer 122, the insulating layer 123, and the pixel electrode layer 124 are sequentially disposed on the lower substrate 12 adjacent to one side of the liquid crystal layer 13. The common electrode layer 122 and the pixel electrode layer 124 are used to generate an electric field substantially parallel to the lower substrate 12 to drive the liquid crystal molecules 132 of the liquid crystal layer 13 to rotate. The common electrode layer 122 includes a plurality of common electrodes 1221, and the pixel electrode layer 124 includes a plurality of pixel electrodes 1241. In the embodiment, the common electrode layer 122 is simultaneously used as the touch sensing layer 20 .
具體地，公共電極1221設在畫素電極1241的下方，畫素電極1241與公共電極1221之間設置了絕緣層123，通過公共電極1221與畫素電極1241之間形成近似水平的電場以驅動液晶分子，相應地，該液晶層13的液晶分子132的介電常數為負且具有異向性，其初使配向為平行配向。在優選實施方式中，公共電極1221與畫素電極1241分別由不同的透明導電層所構成，例如包括氧化銦錫(indium tin oxide，ITO)材料，但不以此為限。Specifically, the common electrode 1221 is disposed under the pixel electrode 1241, and an insulating layer 123 is disposed between the pixel electrode 1241 and the common electrode 1221, and an approximately horizontal electric field is formed between the common electrode 1221 and the pixel electrode 1241 to drive the liquid crystal. The molecules, correspondingly, the liquid crystal molecules 132 of the liquid crystal layer 13 have a negative dielectric constant and an anisotropy, which initially aligns the alignment. In a preferred embodiment, the common electrode 1221 and the pixel electrode 1241 are respectively formed of different transparent conductive layers, and include, for example, indium tin oxide (ITO) materials, but not limited thereto.
在本實施方式中，該導電膜14用於靜電屏蔽。該內嵌式觸控顯示裝置10還包括設置於該下基板12邊緣區域的連接墊126，該連接墊126經由軟性電路板（Flexible Printed Circuit，FPC）15與該導電膜14連接。開關17連接於該連接墊126與接地端之間。在本實施例中，該開關17為一開關電晶體，可與該連接墊126共同設置在該下基板12的邊緣區域上,該開關晶體管的一端接地，另一端經由基板上的佈線連接該連接墊126。優選地，該開關晶體管與驅動該內嵌式觸控顯示裝置10顯示所需的薄膜晶體管陣列(圖未示)同步形成。在另一變更實施例中，該開關17為一電子開關，其可設置該內嵌式觸控顯示裝置10的控制電路板(圖未示)上，該接地端亦可設置於該控制電路板上，該連接墊126通過另一軟性電路板連接該開關17的一端，該開關17的另一端接地。可變更地，該接地端及該開關17亦可直接設置於軟性電路板上。In the present embodiment, the conductive film 14 is used for electrostatic shielding. The in-cell touch display device 10 further includes a connection pad 126 disposed on an edge region of the lower substrate 12, and the connection pad 126 is connected to the conductive film 14 via a Flexible Printed Circuit (FPC) 15. The switch 17 is connected between the connection pad 126 and the ground. In this embodiment, the switch 17 is a switching transistor, and is disposed on the edge region of the lower substrate 12 together with the connection pad 126. One end of the switching transistor is grounded, and the other end is connected to the connection via a wiring on the substrate. Pad 126. Preferably, the switching transistor is formed in synchronization with a thin film transistor array (not shown) required to drive the in-cell touch display device 10. In another modified embodiment, the switch 17 is an electronic switch that can be disposed on a control circuit board (not shown) of the in-cell touch display device 10, and the ground terminal can also be disposed on the control circuit board. The connection pad 126 is connected to one end of the switch 17 through another flexible circuit board, and the other end of the switch 17 is grounded. Alternatively, the ground terminal and the switch 17 can be directly disposed on the flexible circuit board.
可以理解，該連接墊126與該導電膜14除經由FPC15電連接外，還可通過其他方式實現電連接，並不以此為限。It can be understood that the connection pad 126 and the conductive film 14 can be electrically connected by other means besides being electrically connected through the FPC 15, and is not limited thereto.
該內嵌式觸控顯示裝置10還包括一控制晶片18用於依據控制時序輸出相應的控制信號至該開關17以控制該開關17的閉合或斷開。在本實施例中，該控制晶片18通過玻璃覆晶（Chip On Glass，COG）技術設置於該內嵌式觸控顯示裝置10的邊緣區域。可變更地，該控制晶片18還可設置於控制電路板或軟性電路板上。具體地，當該控制晶片18輸出第一控制訊號時，該開關17斷開；當該控制晶片18輸出第二控制訊號時，該開關17閉合。在本實施方式中，該第一控制訊號為低電平訊號；該第二控制訊號為高電平訊號。The in-cell touch display device 10 further includes a control chip 18 for outputting a corresponding control signal to the switch 17 according to the control timing to control the closing or opening of the switch 17. In this embodiment, the control wafer 18 is disposed on an edge region of the in-cell touch display device 10 by a chip on glass (COG) technology. Alternatively, the control wafer 18 can also be disposed on a control circuit board or a flexible circuit board. Specifically, when the control chip 18 outputs the first control signal, the switch 17 is turned off; when the control chip 18 outputs the second control signal, the switch 17 is closed. In this embodiment, the first control signal is a low level signal; and the second control signal is a high level signal.
為實現該複數公共電極1221顯示與感測觸控的雙重功能，該複數公共電極1221的顯示和感測觸控的控制時序間隔設置。In order to realize the dual function of displaying and sensing the touch of the plurality of common electrodes 1221, the display of the plurality of common electrodes 1221 and the control timing of the touch control are set at intervals.
請一併參閱圖3，其為圖1所示的內嵌式觸控顯示裝置開關的時序控制示意圖。本實施方式中，T1代表低電平訊號，該開關17斷開，該導電膜14處於懸浮狀態；T2代表高電平訊號，該開關17閉合，該導電膜14處於接地狀態。在該導電膜14處於懸浮狀態時，觸控掃描信號開始輸入該內嵌式觸控顯示裝置10，對觸控電極進行掃描，並偵測該複數公共電極1221上掃描信號的變化判定觸控位置，實現觸控功能。而在該導電膜14處於接地狀態時，觸控掃描信號停止對觸控電極進行掃描，該複數公共電極1221接收資料驅動訊號以顯示畫面。Please refer to FIG. 3 , which is a schematic diagram of timing control of the in-cell touch display device switch shown in FIG. 1 . In the present embodiment, T1 represents a low level signal, the switch 17 is turned off, the conductive film 14 is in a floating state, T2 represents a high level signal, the switch 17 is closed, and the conductive film 14 is in a grounded state. When the conductive film 14 is in a floating state, the touch scan signal is input to the in-cell touch display device 10, the touch electrode is scanned, and the change of the scan signal on the plurality of common electrodes 1221 is detected to determine the touch position. To achieve touch function. When the conductive film 14 is in a grounded state, the touch scan signal stops scanning the touch electrode, and the plurality of common electrodes 1221 receive the data drive signal to display a picture.
本發明的觸控感測層藉由導電膜所處狀態來實現控制顯示電極的驅動時序以實現觸控功能與顯示功能的切換，有效解決了顯示電極的觸控功能與顯示功能的切換。The touch sensing layer of the present invention realizes the switching of the touch function and the display function by controlling the driving timing of the display electrode by the state of the conductive film, thereby effectively solving the switching between the touch function and the display function of the display electrode.
雖然本發明以優選實施例揭示如上，然其並非用以限定本發明，任何本領域技術人員，在不脫離本發明的精神和範圍內，當可做各種的變化，這些依據本發明精神所做的變化，都應包含在本發明所要求的保護範圍之內。While the invention has been described above in terms of a preferred embodiment thereof, it is not intended to limit the invention, and various modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Changes are intended to be included within the scope of the claimed invention.
10．．．內嵌式觸控顯示裝置10. . . In-cell touch display device
11．．．上基板11. . . Upper substrate
12．．．下基板12. . . Lower substrate
122．．．公共電極層122. . . Common electrode layer
1221．．．公共電極1221. . . Common electrode
123．．．絕緣層123. . . Insulation
124．．．畫素電極層124. . . Pixel electrode layer
1241．．．畫素電極1241. . . Pixel electrode
126．．．連接墊126. . . Connection pad
13．．．液晶層13. . . Liquid crystal layer
132．．．液晶分子132. . . Liquid crystal molecule
14．．．導電膜14. . . Conductive film
15．．．軟性電路板15. . . Flexible circuit board
17．．．開關17. . . switch
20．．．觸控感測層20. . . Touch sensing layer
Claims (10)
一上基板，
一與該上基板相對設置的下基板；
一顯示電極；
一導電膜，設置於該上基板的表面，且該導電膜經由一控制開關接地；
當該導電膜處於懸浮狀態時，觸控掃描信號開始輸入該內嵌式觸控顯示裝置，對顯示電極進行掃描，並偵測顯示電極上掃描信號的變化以判定觸控位置；當該導電膜接地時，觸控掃描信號停止對顯示電極進行掃描，該顯示電極接收資料驅動訊號以顯示畫面。An in-cell touch display device includes:
An upper substrate,
a lower substrate disposed opposite the upper substrate;
a display electrode;
a conductive film disposed on a surface of the upper substrate, and the conductive film is grounded via a control switch;
When the conductive film is in a floating state, the touch scan signal starts to be input into the in-cell touch display device, scans the display electrode, and detects a change of the scan signal on the display electrode to determine the touch position; when the conductive film When grounded, the touch scan signal stops scanning the display electrode, and the display electrode receives the data drive signal to display the picture.
The in-cell touch display device according to any one of claims 3 to 8, wherein the in-cell touch display device is an in-cell touch-type planar rotary liquid crystal display device, and the conductive film is disposed on The upper substrate is away from the surface of the liquid crystal layer and is used for electrostatic shielding of the indium tin oxide film.
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| CN201310155663.6A CN104123025A (en) | 2013-04-29 | 2013-05-02 | Embedded touch display device |
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| CN (1) | CN104123025A (en) |
| TW (1) | TW201441883A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI573055B (en) * | 2015-03-26 | 2017-03-01 | 鴻海精密工業股份有限公司 | In-cell touch display panel |
| TWI636305B (en) * | 2016-08-04 | 2018-09-21 | 鴻海精密工業股份有限公司 | In-cell touch lcd display panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI575418B (en) * | 2015-06-18 | 2017-03-21 | 群創光電股份有限公司 | In-cell touch display device |
| CN105183212A (en) * | 2015-08-04 | 2015-12-23 | 武汉华星光电技术有限公司 | Touch screen LCD panel and touch screen mobile phone |
| CN105335002A (en) * | 2015-09-29 | 2016-02-17 | 江西沃格光电股份有限公司 | Touch display device and manufacturing method thereof |
| CN105224128A (en) * | 2015-09-29 | 2016-01-06 | 江西沃格光电股份有限公司 | Touch control display apparatus and preparation method thereof |
| CN105159504B (en) * | 2015-09-29 | 2018-05-22 | 江西沃格光电股份有限公司 | Touch control display apparatus with high-resistance coating and preparation method thereof |
| CN105242809A (en) | 2015-10-21 | 2016-01-13 | 江西沃格光电股份有限公司 | Touch display device and preparation method thereof |
| CN105445984B (en) * | 2015-12-09 | 2019-01-15 | 厦门天马微电子有限公司 | A kind of touch display screen and touch control display method |
| CN105629603A (en) * | 2016-03-16 | 2016-06-01 | 昆山龙腾光电有限公司 | Display device and preparing method thereof |
| CN107340908A (en) * | 2017-06-23 | 2017-11-10 | 厦门天马微电子有限公司 | Touching display screen, touch control display apparatus, progress control method and device |
| CN107390951B (en) * | 2017-09-21 | 2020-07-31 | 京东方科技集团股份有限公司 | Touch display panel, touch display device and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI431362B (en) * | 2009-05-29 | 2014-03-21 | Japan Display West Inc | Touch sensor, display and electronic device |
| CN102135824B (en) * | 2010-01-21 | 2014-07-30 | 宸鸿光电科技股份有限公司 | Built-in touch display and processing method thereof |
| JP5726606B2 (en) * | 2011-04-13 | 2015-06-03 | 株式会社ジャパンディスプレイ | Display panel with touch detection function, driving method thereof, driving circuit, and electronic device |
| TWI596515B (en) * | 2011-10-14 | 2017-08-21 | 劉鴻達 | Touch sensing method with interlacing driving scheme, touch sensing module and display |
| CN102968231B (en) * | 2012-11-08 | 2016-07-06 | 北京京东方光电科技有限公司 | A kind of capacitance type in-cell touch panel, its driving method and display device |
-
2013
- 2013-04-29 TW TW102115322A patent/TW201441883A/en unknown
- 2013-05-02 CN CN201310155663.6A patent/CN104123025A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI573055B (en) * | 2015-03-26 | 2017-03-01 | 鴻海精密工業股份有限公司 | In-cell touch display panel |
| TWI636305B (en) * | 2016-08-04 | 2018-09-21 | 鴻海精密工業股份有限公司 | In-cell touch lcd display panel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104123025A (en) | 2014-10-29 |
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