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CN101424855B - display panel with multiple touch control function - Google Patents

display panel with multiple touch control function Download PDF

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Publication number
CN101424855B
CN101424855B CN2008101838167A CN200810183816A CN101424855B CN 101424855 B CN101424855 B CN 101424855B CN 2008101838167 A CN2008101838167 A CN 2008101838167A CN 200810183816 A CN200810183816 A CN 200810183816A CN 101424855 B CN101424855 B CN 101424855B
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sensing
coupled
signal
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display panel
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CN101424855A (en
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蔡育铮
王朝珍
贾邦强
郑国兴
马玫生
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AUO Corp
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AU Optronics Corp
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Abstract

The invention provides a display panel with a multi-touch function, which comprises a display area and a non-display area. The display area is provided with a data line, a gate line, a first sensing line, a second sensing line and a sensing unit. The sensing unit is electrically connected with or electrically separates the first sensing line and the second sensing line according to the touch signal. The non-display area is provided with a grid driving circuit, a first switch and a second switch. The first switch provides a path for charging the second sensing line according to the scan signal, and the second switch provides a path for discharging the second sensing line according to the reset signal.

Description

Display panel with multiplex touch control function
Technical field
The present invention is relevant to a kind of display panels, refers to a kind of display panels with multiplex touch control function especially.
Background technology
(liquid crystal display LCD) owing to have a compact advantage, replaces the bulky cathode-ray tube (CRT) of tradition (cathode ray tube, CRT) display, and be widely used in all types of electronic products to LCD gradually.Along with the microminiaturization of the size of electronic product, do not had enough spaces on the product and held, so the touch panel (touch panel) of combination of touch control input and Presentation Function is the most popular input technology at present as traditional input medias such as keyboard, mouses.
Touch panel is of a great variety, mainly is divided into resistance-type, condenser type, ultrasonic formula and infrared ray sensing and detecting type etc.According to technological layer and cost consideration, the field that different touch panels be fit to be used is difference to some extent also.For instance, the operation principles of resistance-type panel is the change in voltage that induction produces because of pressure, having the low advantage of cost, also is the technology of popularizing the most at present, is usually used in consumer products such as PDA(Personal Digital Assistant), mobile phone, navigational system, electronic dictionary or information household appliances.Capacitive panels during according to touch-control the static electricity on human body change and come inductance capacitance to change, its penetrability is higher, but because of the panel complex process has higher cost, present stage is applied on the medium-and-large-sized product mostly, as Automatic Teller Machine (ATM), common query machine (KIOSK) or commercial plant etc.The principle that the utilization of acoustic wave panel detects sound wave operates, and its touch-control accuracy is good, but is vulnerable to external noise, is applied to the large-size product mostly, as common query machine, automatic machine and medical equipment etc.The optical profile type panel then utilizes the principle of signal interrupting to operate, and its volume is big and precision is not high, but can reach 100% penetrability, is applied to the higher high-order product of price mostly, as ATM, the mechanical, electrical sub-blank of OA affairs or commercial plant etc.
Please refer to Fig. 1, Fig. 1 is the synoptic diagram of LCD 100 in the background technology.LCD 100 comprises viewing area 120 and non-display area.Viewing area 120 is provided with many data lines parallel to each other (data line) D 1～D m, many gate lines parallel to each other (gate line) G 1～G n, a plurality of display unit P 11～P Mn, many sense wire S parallel to each other X1～S Xm, a plurality of sensing cell S 11～S Mn, and a plurality of thin film transistor (TFT) (thin film transistor, TFT) switching TFT 11～TFT MnData line D 1～D mAnd gate lines G 1～G nSetting interlaced with each other, and sense wire S X1～S XmIn each sense wire be located at data line D 1～D mIn between the corresponding two adjacent data lines.Display unit P 11～P MnBe located at the confluce of corresponding data line and gate line respectively, each display unit all comprises TFT switch, liquid crystal capacitance C LCWith storage capacitors C ST, can control light according to the electric charge of capacitor memory.Sensing cell S 11～S MnCan detect touching signals, and when detecting touching signals, present the state (short circuit) of conducting.Thin film transistor switch TFT 11～TFT MnGrid be respectively coupled to corresponding gate line, and the sweep signal that transmits according to corresponding gate line is with sensing cell S 11～S MnBe electrically connected to corresponding sense wire S respectively X1～S Xm, or electrically separate sensing cell S 11～S MnWith corresponding sense wire S X1～S Xm
The non-display area of LCD 100 is provided with source electrode drive circuit (source driver) 130, gate driver circuit (gate driver) 140, and a sensing circuit 150.Gate driver circuit 140 is coupled to gate lines G 1～G n, can produce sweep signal to open or to close corresponding display unit P by corresponding gate line 11～P MnWithin the TFT switch.Source electrode drive circuit 130 is coupled to data line D 1～D m, can produce the data-signal of desiring display image corresponding to each display unit, and reach corresponding display unit by corresponding data line.Sensing circuit 150 is coupled to sense wire S X1～S Xm, can be according to sense wire S X1～S XmThe signal that transmits calculates the position of touch points.
Summary of the invention
The invention provides a kind of display panel, comprise viewing area and non-display area with multiplex touch control function.This viewing area comprises data line, is used for transmitting the data-signal that is relevant to display image; Gate line is used for the transmission scan signal; Display unit is coupled to this data line and this gate line, is used for coming display image according to this sweep signal and this data-signal; First sense wire is used for exporting a sensing signal that is relevant to this sweep signal; Second sense wire is used for transmitting this sensing signal; And sensing cell, be coupled between this first sense wire and this second sense wire, be used for being electrically connected or electrically separating this first and second sense wire according to a touching signals.This non-display area comprises gate driver circuit, is used for exporting this sweep signal and reset signal; This gate driver circuit comprises reset circuit in addition, is used for producing this reset signal; First switch is coupled between this gate line and this second sense wire, is used for providing the path that this second sense wire is charged to the noble potential of sweep signal according to this sweep signal; Second switch, be used to provide the discharge this second sense wire the path, this second switch comprises: first end is coupled to this second sense wire; Second end is coupled to an earthing potential; Control end is coupled to this gate driver circuit, is used for being electrically connected or electrically separating this first end and this second end according to this reset signal; And sensing circuit, be coupled to this first sense wire, be used for judging the position that produces this touching signals according to this sensing signal.
The present invention provides a kind of display panel with multiplex touch control function in addition, comprises viewing area and non-display area.This viewing area comprises many data lines, is used for transmitting the data-signal that is relevant to display image; Many gate lines are used for the transmission scan signal; A plurality of display units, be respectively coupled in these many data lines corresponding gate line in the corresponding data line and this many gate lines, being used for the data-signal that sweep signal that this corresponding gate line of foundation transmits and this corresponding data line transmit comes display image; Many first sense wires are used for the sweep signal that receives according to corresponding display unit, export corresponding sensing signal respectively; Many second sense wires are used for transmitting corresponding sensing signal respectively; A plurality of sensing cells are respectively coupled between corresponding first sense wire and corresponding second sense wire, and the corresponding touching signals of each sense unit is electrically connected or electrical these corresponding first and second sense wires that separate.This non-display area comprises gate driver circuit, is used for output scanning signal and reset signal; This gate driver circuit comprises a reset circuit in addition, is used for producing this reset signal; A plurality of first switches are respectively coupled between corresponding gate line and corresponding second sense wire, and being used for provides the path that corresponding second sense wire is charged to the noble potential of sweep signal respectively according to corresponding sweep signal; A plurality of second switches, be used to provide respectively the discharge corresponding second sense wire the path, each second switch comprises: first end is coupled to corresponding second sense wire; Second end is coupled to an earthing potential; Control end is coupled to this gate driver circuit, is used for being electrically connected or electrically separating this first end and this second end according to a corresponding reset signal; And sensing circuit, be coupled to these many first sense wires, be used for judging the position that produces touching signals according to the sensing signal that these many first sense wires transmit.
The tradition touch panel uses single touch technology (single-touch), and the same time can only be passed on single contact information to controller.In some comparatively complicated application (as the 3D rendering Processing Interface), user's usually need to arrange in pairs or groups mouse and keyboard uses in the lump, just can obtain best manipulation effect.The multiplex touch control (multi-touch) that New Development of the present invention is put on display then can write down the multiple point touching information of same time generation, allow the user control the touch screen, can also allow a plurality of users to carry out interconnected communication (as interactive video wall) at one time with gesture, action or in the touching mode.
Description of drawings
Fig. 1 is the synoptic diagram of a LCD in the background technology.
Fig. 2 is the synoptic diagram of a LCD in the first embodiment of the invention.
Fig. 3 is the synoptic diagram of a LCD in the second embodiment of the invention.
Drawing reference numeral: 130,230 source electrode drive circuits, 140,240 gate driver circuits
150,250 sensing circuits, 260 reset circuits
D 1～D mData line G 1～G nGate line
P 11～P MnDisplay unit S 11～S MnSensing cell
C LCLiquid crystal capacitance C STStorage capacitors
D diode SW 1～SW nOn-off circuit
120,220 viewing areas, 100,200,300 LCD
S X1～S Xm, S Y1～S YnSense wire
TFT, TFT1, TFT2, TFT 11～TFT MnThin film transistor switch
Embodiment
The tradition touch panel uses single touch technology (single-touch), and the same time can only be passed on single contact information to controller.In some comparatively complicated application (as the 3D rendering Processing Interface), user's usually need to arrange in pairs or groups mouse and keyboard uses in the lump, just can obtain best manipulation effect.The multiplex touch control (multi-touch) that New Development of the present invention is put on display then can write down the multiple point touching information of same time generation, allow the user control the touch screen, can also allow a plurality of users to carry out interconnected communication (as interactive video wall) at one time with gesture, action or in the touching mode.
Please refer to Fig. 2, the synoptic diagram of Fig. 2 for having the LCD 200 of multiplex touch control function in the first embodiment of the invention.LCD 200 comprises viewing area 220.Viewing area 220 is provided with many data line D parallel to each other 1～D m, many gate lines G parallel to each other 1～G n, a plurality of display unit P 11～P Mn, many sense wire S parallel to each other X1～S XmAnd S Y1～S Yn, a plurality of sensing cell S 11～S Mn, and a plurality of on-off circuit SW 1～SW nData line D 1～D mAnd gate lines G 1～G nSetting interlaced with each other, and sense wire S X1～S XmIn each sense wire be located at data line D 1～D mIn between the corresponding two adjacent data lines.Display unit P 11～P MnBe located at the confluce of corresponding data line and gate line respectively, each display unit all comprises TFT switch, liquid crystal capacitance C LCWith storage capacitors C ST, can control light according to the electric charge of capacitor memory.Sensing cell S 11～S MnCan detect touching signals, and when detecting touching signals, be unlatching (short circuit).
Sensing cell S 11～S MnAn end be respectively coupled to corresponding sense wire S X1～S Xm, the other end is then respectively by corresponding sense wire S Y1～S YnBe coupled to corresponding on-off circuit SW 1～SW nAt the operation principles of LCD, sensing cell S 11～S MnCan detect dissimilar touching signals, for example touching signals can comprise the variation of pressure, electric capacity, light intensity or ultrasonic signal.If detect touching signals, sensing cell S 11～S MnCan be unlocked (short circuit), also be about to corresponding on-off circuit SW 1～SW nRespectively by corresponding sense wire S Y1～S YnBe electrically connected to corresponding sense wire S X1～S Xm
The non-display area of LCD 200 is provided with source electrode drive circuit 230, gate driver circuit 240, sensing circuit 250, and a reset circuit 260.Gate driver circuit 240 is coupled to gate lines G 1～G n, can produce sweep signal to open or to close corresponding display unit P by corresponding gate line 11～P MnWithin the TFT switch.Source electrode drive circuit 230 is coupled to data line D 1～D m, can produce the data-signal of desiring display image corresponding to each display unit, and reach corresponding display unit by corresponding data line.Sensing circuit 250 is coupled to sense wire S X1～S Xm, can be according to sense wire S X1～S XmThe calculated signals that transmits goes out the position of touch points.
On-off circuit SW of the present invention 1～SW nRespectively comprise two on-off elements, in first embodiment of the invention, each on-off circuit all comprises diode D and thin film transistor switch TFT.In the application of multi-point touch, if the user touches sensing cell S simultaneously 11And S 1n, sense wire S Y1Sense wire and S YnAll can be electrically connected to sense wire S X1, if other controlling mechanism of nothing, sense wire S at this moment X1Then can't identification signal.Therefore, LCD 200 of the present invention uses the diode D in the on-off circuit to control: in gate lines G 1When receiving sweep signal, though sensing cell S 11And S 1nBe all conducting, but on-off circuit SW is only arranged 1In diode D can be unlocked, so signal only can pass through sensing cell S 11Be passed to sense wire S X1In like manner, in gate lines G nWhen receiving sweep signal, though sensing cell S 11And S 1nBe all conducting, but on-off circuit SW is only arranged nIn diode D can be unlocked, so signal only can pass through sensing cell S 1nBe passed to sense wire S X1
On the other hand, if sense wire S Y1～S YnCurrent potential maintain noble potential always, and can't reach the requirement of multi-point touch.Work as gate lines G 1When receiving sweep signal, can open on-off circuit SW 1In diode D, this moment sense wire S Y1Can be charged to the noble potential of sweep signal, if other controlling mechanism of nothing, sense wire S at this moment Y1Current potential maintain noble potential always, and can't continue to provide scan function.Therefore, LCD 200 of the present invention uses the thin film transistor switch TFT in the on-off circuit to control.In the blank time (blanking) of sweep signal, the reset circuit 260 in the gate driver circuit 230 can output control signals to on-off circuit SW 1～SW n, by opening on-off circuit SW 1～SW nThin film transistor switch TFT so that sense wire S to be provided respectively Y1～S YnDischarge path, make each sense wire S Y1～S YnCurrent potential all can get back to electronegative potential once more.Therefore, LCD 200 of the present invention can provide the function of multiplex touch control.
Please refer to Fig. 3, the synoptic diagram of Fig. 3 for having the LCD 300 of multiplex touch control function in the second embodiment of the invention.LCD 200 similar of the LCD 300 of second embodiment of the invention and first embodiment, difference is on-off circuit SW 1～SW nStructure.In the LCD 200 of first embodiment of the invention, each on-off circuit all comprises diode D and thin film transistor switch TFT.In the LCD 300 of second embodiment of the invention, each on-off circuit all comprises thin film transistor switch TFT1 and TFT2.The thin film transistor switch TFT1 of LCD 300 and TFT2 function are same as the diode D and the thin film transistor switch TFT of LCD 200 respectively, therefore the function mode and the LCD 200 of LCD 300 are similar, in the aforementioned specification content, describe in detail, do not add in addition at this and give unnecessary details.
According to operation principles, LCD 200 of the present invention and 300 can be used different types of sensing cell, for example sensing elements such as resistance-type, condenser type and piezoelectric, or photo-sensitive cells such as optical diode and optotransistor.In addition, on-off circuit SW of the present invention 1～SW nCan comprise diode D and thin film transistor switch TFT, or other has the on-off element of identical function.
The above only is preferred embodiment of the present invention, and all equalizations of being done according to claim scope of the present invention change and modify, and all should belong to covering scope of the present invention.

Claims (14)

1.一种具有多重触控功能的显示面板，其特征在于，所述的显示面板包含：1. A display panel with multi-touch function, characterized in that, the display panel comprises: 一显示区域，包含：A display area, including: 一数据线，用来传递一相关于显示图像的数据信号；A data line, used to transmit a data signal related to the displayed image; 一栅极线，用来传递一扫描信号；a gate line, used to transmit a scanning signal; 一显示单元，耦接于所述数据线和所述栅极线，用来依据所述扫描信号及所述数据信号来显示图像；a display unit, coupled to the data line and the gate line, for displaying an image according to the scan signal and the data signal; 一第一感测线，用来输出一相关于所述扫描信号的感测信号；a first sensing line, used to output a sensing signal related to the scanning signal; 一第二感测线，用来传送所述感测信号；以及a second sensing line, used to transmit the sensing signal; and 一感测单元，耦接于所述第一感测线和所述第二感测线之间，用来依据一触控信号电连接或电性分离所述第一和第二感测线；以及a sensing unit, coupled between the first sensing line and the second sensing line, for electrically connecting or electrically separating the first and second sensing lines according to a touch signal; as well as 一非显示区域，包含：A non-display area, including: 一栅极驱动电路，用来输出所述扫描信号和一重置信号；所述栅极驱动电路另包含一重置电路，用来产生所述重置信号；A gate drive circuit, used to output the scan signal and a reset signal; the gate drive circuit further includes a reset circuit, used to generate the reset signal; 一第一开关，耦接于所述栅极线和所述第二感测线之间，用来依据所述扫描信号提供将所述第二感测线充电至扫描信号的高电位的路径；a first switch, coupled between the gate line and the second sensing line, for providing a path for charging the second sensing line to a high potential of the scanning signal according to the scanning signal; 一第二开关，用来提供放电所述第二感测线的路径，所述第二开关包含：A second switch for providing a path for discharging the second sensing line, the second switch comprising: 一第一端，耦接于所述第二感测线；a first end coupled to the second sensing line; 一第二端，耦接于一接地电位；a second terminal coupled to a ground potential; 一控制端，耦接于所述栅极驱动电路，用来依据所述重置信号电连接或电性分离所述第一端和所述第二端；以及a control terminal, coupled to the gate drive circuit, for electrically connecting or electrically separating the first terminal and the second terminal according to the reset signal; and 一感测电路，耦接于所述第一感测线，用来依据所述感测信号判断产生所述触控信号的位置。A sensing circuit, coupled to the first sensing line, is used for judging the position where the touch signal is generated according to the sensing signal. 2.如权利要求1所述的显示面板，其特征在于，所述显示单元包含：2. The display panel according to claim 1, wherein the display unit comprises: 一薄膜晶体管开关，其控制端耦接于所述栅极线，而其第一端耦接于所述数据线；a thin film transistor switch, the control terminal of which is coupled to the gate line, and the first terminal of which is coupled to the data line; 一液晶电容，耦接于所述薄膜晶体管开关的第二端；以及a liquid crystal capacitor coupled to the second end of the TFT switch; and 一储存电容，耦接于所述薄膜晶体管开关的第二端和一共同电压。A storage capacitor is coupled to the second end of the TFT switch and a common voltage. 3.如权利要求1所述的显示面板，其特征在于，所述非显示区域另包含一源极驱动电路，用来提供所述数据信号。3. The display panel as claimed in claim 1, wherein the non-display area further comprises a source driving circuit for providing the data signal. 4.如权利要求1所述的显示面板，其特征在于，所述栅极驱动电路、所述第一开关，和所述第二开关系设置于同一印刷电路板之上。4. The display panel as claimed in claim 1, wherein the gate driving circuit, the first switch, and the second switch are arranged on a same printed circuit board. 5.如权利要求1所述的显示面板，其特征在于，所述感测单元是包含一感压元件或一感光元件。5. The display panel as claimed in claim 1, wherein the sensing unit comprises a pressure sensing element or a light sensing element. 6.如权利要求5所述的显示面板，其特征在于，所述感压元件包含一电容式感压元件或一压电元件。6. The display panel as claimed in claim 5, wherein the pressure sensing element comprises a capacitive pressure sensing element or a piezoelectric element. 7.如权利要求5所述的显示面板，其特征在于，所述感光元件包含一光二极管或一光晶体管。7. The display panel as claimed in claim 5, wherein the photosensitive element comprises a photodiode or a phototransistor. 8.一种具有多重触控功能的显示面板，其特征在于，所述的显示面板包含：8. A display panel with multiple touch functions, characterized in that the display panel comprises: 一显示区域，包含：A display area, including: 多条数据线，用来传递相关于显示图像的数据信号；A plurality of data lines are used to transmit data signals related to display images; 多条栅极线，用来传递扫描信号；A plurality of gate lines are used to transmit scanning signals; 多个显示单元，分别耦接于所述多条数据线中一相对应的数据线与所述多条栅极线中一相对应的栅极线，用来依据所述相对应的栅极线传来的扫描信号及所述相对应的数据线传来的数据信号来显示图像；A plurality of display units, respectively coupled to a corresponding data line among the plurality of data lines and a corresponding gate line among the plurality of gate lines, for use in accordance with the corresponding gate line The scanning signal transmitted and the data signal transmitted from the corresponding data line to display the image; 多条第一感测线，用来依据相对应显示单元接收到的扫描信号，分别输出相对应的感测信号；A plurality of first sensing lines are used to respectively output corresponding sensing signals according to the scanning signals received by the corresponding display units; 多条第二感测线，分别用来传送相对应的感测信号；A plurality of second sensing lines are respectively used to transmit corresponding sensing signals; 多个感测单元，分别耦接于一相对应的第一感测线和一相对应的第二感测线之间，每一感测单元依据一相对应的触控信号电连接或电性分离所述相对应的第一和第二感测线；以及A plurality of sensing units are respectively coupled between a corresponding first sensing line and a corresponding second sensing line, and each sensing unit is electrically connected or electrically connected according to a corresponding touch signal separating the corresponding first and second sense lines; and 一非显示区域，包含：A non-display area, including: 一栅极驱动电路，用来输出扫描信号和重置信号；所述栅极驱动电路另包含一重置电路，用来产生所述重置信号；A gate drive circuit, used to output scan signals and reset signals; the gate drive circuit further includes a reset circuit, used to generate the reset signal; 多个第一开关，分别耦接于相对应的栅极线和相对应的第二感测线之间，用来依据相对应的扫描信号分别提供将相对应的第二感测线充电至扫描信号的高电位的路径；A plurality of first switches are respectively coupled between the corresponding gate lines and the corresponding second sensing lines, and are used to charge the corresponding second sensing lines to scan according to the corresponding scanning signals. The high potential path of the signal; 多个第二开关，分别用来提供放电相对应的第二感测线的路径，每一第二开关包含：A plurality of second switches are respectively used to provide a path for the second sensing line corresponding to the discharge, and each second switch includes: 一第一端，耦接于一相对应的第二感测线；a first end coupled to a corresponding second sensing line; 一第二端，耦接于一接地电位；a second terminal coupled to a ground potential; 一控制端，耦接于所述栅极驱动电路，用来依据一相对应的重置信号电连接或电性分离所述第一端和所述第二端；以及a control terminal, coupled to the gate drive circuit, for electrically connecting or electrically separating the first terminal and the second terminal according to a corresponding reset signal; and 一感测电路，耦接于所述多条第一感测线，用来依据所述多条第一感测线传来的感测信号判断产生触控信号的位置。A sensing circuit, coupled to the plurality of first sensing lines, is used for judging the position where the touch signal is generated according to the sensing signals transmitted from the plurality of first sensing lines. 9.如权利要求8所述的显示面板，其特征在于，每一显示单元包含：9. The display panel according to claim 8, wherein each display unit comprises: 一薄膜晶体管开关，其控制端耦接于一相对应的栅极线，而其第一端耦接于一相对应的数据线；A TFT switch, the control end of which is coupled to a corresponding gate line, and the first end of which is coupled to a corresponding data line; 一液晶电容，耦接于所述薄膜晶体管开关的第二端；以及a liquid crystal capacitor coupled to the second end of the TFT switch; and 一储存电容，耦接于所述薄膜晶体管开关的第二端和一共同电压。A storage capacitor is coupled to the second end of the TFT switch and a common voltage. 10.如权利要求8所述的显示面板，其特征在于，所述非显示区域另包含一源极驱动电路，用来提供数据信号。10. The display panel as claimed in claim 8, wherein the non-display area further comprises a source driving circuit for providing data signals. 11.如权利要求8所述的显示面板，其特征在于，所述栅极驱动电路、所述多个第一开关，和所述多个第二开关系设置于同一印刷电路板之上。11. The display panel as claimed in claim 8, wherein the gate driving circuit, the plurality of first switches, and the plurality of second switches are disposed on a same printed circuit board. 12.如权利要求8所述的显示面板，其特征在于，所述多个感测单元是包含感压元件或感光元件。12. The display panel as claimed in claim 8, wherein the plurality of sensing units comprise pressure-sensing elements or light-sensing elements. 13.如权利要求12所述的显示面板，其特征在于，所述感压元件是包含电容式感压元件或压电元件。13. The display panel as claimed in claim 12, wherein the pressure-sensing element comprises a capacitive pressure-sensing element or a piezoelectric element. 14.如权利要求12所述的显示面板，其特征在于，所述感光元件是包含光二极管或光晶体管。14. The display panel according to claim 12, wherein the photosensitive element comprises a photodiode or a phototransistor.
CN2008101838167A 2008-12-09 2008-12-09 display panel with multiple touch control function Active CN101424855B (en)

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