CN106406622B - OLED touch control display apparatus - Google Patents

OLED touch control display apparatus Download PDF

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Publication number
CN106406622B
CN106406622B CN201610900647.9A CN201610900647A CN106406622B CN 106406622 B CN106406622 B CN 106406622B CN 201610900647 A CN201610900647 A CN 201610900647A CN 106406622 B CN106406622 B CN 106406622B
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CN
China
Prior art keywords
touch control
electrically
touch
oled
film transistor
Prior art date
Application number
CN201610900647.9A
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Chinese (zh)
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CN106406622A (en
Inventor
金羽锋
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深圳市华星光电技术有限公司
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Priority to CN201610900647.9A priority Critical patent/CN106406622B/en
Publication of CN106406622A publication Critical patent/CN106406622A/en
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Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412Digitisers structurally integrated in a display
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices

Abstract

The present invention provides a kind of OLED touch control display apparatus, by making touch control electrode in the array substrate of OLED display panel, and touch control electrode is connected to the analog-digital converter of data driving chip via sense wire, and touch-control drive module in the prior art is integrated into sequence controller, to complete touch-control scanning detecting by the external compensation detecting module of OLED display panel, when touch-control scans, charge detecting is carried out by the analog-digital converter in data driving chip, according to the position for the sense wire that touch control electrode block is electrically connected, and the timing of sensing control signal determines the position touched, touch chip can be saved, reduce the number of chips of OLED touch control display apparatus, reduce the production cost of OLED touch control display apparatus.

Description

OLED touch control display apparatus

Technical field

The present invention relates to field of display technology more particularly to a kind of OLED touch control display apparatus.

Background technique

In recent years, liquid crystal display (Liquid Crystal Display, LCD) device and Organic Light Emitting Diode The panel display apparatus such as (Organic Light Emitting Diode, OLED) display device gradually replace CRT to show Device becomes the main product in display device market.Wherein, OLED display has that self-luminous, driving voltage are low, shine effect Rate is high, the response time is short, clarity and contrast are high, nearly 180 ° of visual angles, use temperature range are wide, it can be achieved that Flexible Displays and big Many advantages, such as area total colouring, is known as being the display device for most having development potentiality by industry.

OLED display generally includes: substrate, the encapsulation cover plate being oppositely arranged with substrate, the anode on substrate, Hole injection layer on anode, the hole transmission layer on hole injection layer, the luminescent layer on hole transmission layer, Electron transfer layer on luminescent layer, the electron injecting layer on electron transfer layer and the yin on electron injecting layer Pole.Emit hole and electronics to luminescent layer when OLED display works, combines these electrons and holes and generate excitability electricity Son-hole pair, and excitability electron-hole pair is converted into ground state realization from excited state and is shone.

With the development of portable electronic display device, touch screen (Touch panel) provide it is a kind of new it is man-machine mutually Arena face, it is more direct in use, more humane.Touch screen and flat display apparatus are combined, it is aobvious to form touch-control Showing device can make flat display apparatus have touch function, and input can be executed by finger, stylus etc., operate more straight It sees, is easy.OLED touch control display apparatus is generallyd use at present separates to manufacture by OLED display and touch screen, then again will The two combines, and generally includes four-layer structure, is oled substrate, OLED cover board, touch screen base plate and touch screen lid respectively Plate.Referring to Fig. 1, existing OLED touch-control display panel includes: touch panel 91, set on 91 lower section of touch panel OLED display panel 92, the touch chip 94 being electrically connected with the touch panel 91 and the OLED display panel 92 are electrically The data driving chip 93 of connection, the sequence controller 95 being electrically connected with the data driving chip 93 and the timing control The System on Chip/SoC 96 that device 95 processed and touch chip 94 are electrically connected wherein is equipped in touch chip 94 for detecting touching signals Analog-digital converter (Analog-to-Digital Converter, ADC) and touch-control drive module, in data driving chip 93 Equipped with for detecting Organic Light Emitting Diode in OLED display panel and the external compensation of thin film transistor (TFT) threshold voltage being driven to detect Module is surveyed, while causing the repetition of module using touch-control drive module and external compensation detecting module, is unfavorable for production cost Control, reduce product competitiveness.

Summary of the invention

The purpose of the present invention is to provide a kind of OLED touch control display apparatus, can reduce the core of OLED touch control display apparatus Piece quantity reduces the production cost of OLED touch control display apparatus.

To achieve the above object, the present invention provides a kind of OLED touch control display apparatus, comprising: OLED touch-control display surface What plate, the data driving chip being electrically connected with the OLED touch-control display panel and the data driving chip were electrically connected Sequence controller and the System on Chip/SoC being electrically connected with the sequence controller;

The OLED touch-control display panel includes: substrate, the touch control electrode layer on the substrate, is set to the touch-control The pixel unit of passivation layer on electrode layer, multiple array arrangements on the passivation layer;

The data driving chip includes: analog-digital converter, and the analog-digital converter passes through sense wire and the pixel list Member is electrically connected, and same row pixel unit is electrically connected same sense wire;

The touch control electrode layer includes: several array arrangements and mutually independent touch control electrode block, each touch control electrode Block corresponds to n pixel unit, each touch control electrode block and its corresponding to n pixel unit in a pixel unit electrical property The sense wire of connection is electrically connected, and n is positive integer;

The OLED touch control display apparatus is complete by the cooperation of the analog-digital converter, sequence controller and System on Chip/SoC At the detecting of touching signals and the threshold voltage compensation of pixel unit.

Each pixel unit includes: switching thin-film transistor, driving thin film transistor (TFT), sensing film transistor, deposits Storage holds and Organic Light Emitting Diode;

The grid of the switching thin-film transistor accesses scanning signal, source electrode incoming data signal, and drain electrode, which is electrically connected, drives The grid of dynamic thin film transistor (TFT);The source electrode of the driving thin film transistor (TFT) accesses supply voltage, and drain electrode is electrically connected organic shine The anode of diode;The grid access sensing control signal of the sensing film transistor, it is brilliant that source electrode is electrically connected driving film The drain electrode of body pipe, drain electrode are electrically connected sense wire;One end of the storage capacitance is electrically connected the grid of driving thin film transistor (TFT), The other end is electrically connected the drain electrode of driving thin film transistor (TFT);The minus earth of Organic Light Emitting Diode.

The touch control electrode block is electrically connected via sensing film transistor and the sense wire.

The touch control electrode block is electrically connected by the source electrode of a via hole and the sensing film transistor.

The OLED touch control display apparatus first carries out picture transmission in a frame image time, then carries out touch-control scanning.

When picture transmission, the transmission frequency of the data-signal is the picture display frequency of the OLED touch control display apparatus 2 times.

When touch-control scans, the position for the sense wire that System on Chip/SoC is electrically connected according to touch control electrode block and sensing are controlled The timing of signal determines the position touched.

The substrate, touch control electrode layer and passivation layer be it is transparent, the light that the pixel unit issues is via base Plate outgoing.

Beneficial effects of the present invention: the present invention provides a kind of OLED touch control display apparatus, by OLED display panel Array substrate on make touch control electrode, and touch control electrode is connected to the analog-to-digital conversion of data driving chip via sense wire Device, and touch-control drive module in the prior art is integrated into sequence controller, thus the outside for passing through OLED display panel It compensates detecting module and completes touch-control scanning detecting, when touch-control scans, electricity is carried out by the analog-digital converter in data driving chip Lotus is detected, and the position for the sense wire being electrically connected according to touch control electrode block and the timing of sensing control signal determine touch Position can save touch chip, reduce the number of chips of OLED touch control display apparatus, reduce the life of OLED touch control display apparatus Produce cost.

Detailed description of the invention

For further understanding of the features and technical contents of the present invention, it please refers to below in connection with of the invention detailed Illustrate and attached drawing, however, the drawings only provide reference and explanation, is not intended to limit the present invention.

In attached drawing,

Fig. 1 is the structure chart of existing OLED touch control display apparatus;

Fig. 2 is the structure chart of OLED touch control display apparatus of the invention;

Fig. 3 is the sectional view of OLED touch control display apparatus of the invention;

Fig. 4 is the touch control electrode top view of OLED touch control display apparatus of the invention;

Fig. 5 is the equivalent circuit diagram of OLED touch control display apparatus of the invention;

Fig. 6 is the working timing figure of OLED touch control display apparatus of the invention.

Specific embodiment

Further to illustrate technological means and its effect adopted by the present invention, below in conjunction with preferred implementation of the invention Example and its attached drawing are described in detail.

Referring to Fig. 2, the present invention provides a kind of OLED touch control display apparatus, comprising: OLED touch-control display panel 1 and institute The data driving chip (Source IC) 2 and the data driving chip 2 for stating the electric connection of OLED touch-control display panel 1 are electrically The sequence controller (Tcon) 3 of connection and the System on Chip/SoC 4 being electrically connected with the sequence controller 3;

Referring to Fig. 3, the OLED touch-control display panel 1 includes: substrate 11, the touch control electrode on the substrate 11 Layer 12, the first metal layer 141 on the passivation layer 13, is set to the passivation layer 13 on the touch control electrode layer 12 It is gate insulating layer 142 on the first metal layer 141 and passivation layer 13, active on the gate insulating layer 142 Layer 143, is set to the interlayer insulating film at the interlayer insulating film 144 on the active layer 143 and gate insulating layer 142 Second metal layer 145 on 144, is set to institute at the flatness layer 146 in the second metal layer 145 and interlayer insulating film 144 It states the anode layer 147 on flatness layer 146, the organic luminous layer 148 on the anode layer 147, be set to the anode layer 147 And on flatness layer 146 and surround the organic luminous layer 148 pixel defining layer 149, be set to the organic luminous layer 148 and Cathode layer 1410 in pixel defining layer 149 is equipped with encapsulation cover plate (not shown) on cathode layer 1410.

The first metal layer 141, gate insulating layer 142, active layer 143, interlayer insulating film 144, second metal layer 145, flatness layer 146, anode layer 147, anode layer 147, organic luminous layer 148, pixel defining layer 149 and cathode layer 1410 Together form the pixel unit 14 of multiple array arrangements.

Wherein, the first metal layer 141, gate insulating layer 142, active layer 143, interlayer insulating film 144, the second metal Layer 145 together forms several thin film transistor (TFT)s, capacitor and metal contact wires, specifically, the first metal layer 141 It is formed with the grid of several thin film transistor (TFT)s, the lower electrode plate of capacitor and grid line, the formation of second metal layer 142 There are the source electrode and drain electrode, the electric pole plate of capacitor, data line and sense wire of several thin film transistor (TFT)s, the anode layer 147, organic luminous layer 148, pixel defining layer 149 and cathode layer 1410 together form several Organic Light Emitting Diodes.

Wherein, the substrate 11, touch control electrode layer 12, passivation layer 13, gate insulating layer 142, interlayer insulating film 144, flat Smooth layer 146 and anode layer 147 be it is transparent, the light that the pixel unit 14 issues is emitted via substrate 11.

Referring to Fig. 2, the data driving chip 2 includes: analog-digital converter ADC, the analog-digital converter ADC passes through sense Survey line and the pixel unit 14 are electrically connected, and same row pixel unit 14 is electrically connected same sense wire;

Referring to Fig. 4, the touch control electrode layer 12 includes: several array arrangements and mutually independent touch control electrode block 121, Each touch control electrode block 121 corresponds to n pixel unit 14, each touch control electrode block 121 and n pixel list corresponding to it The sense wire that a pixel unit 14 in member 14 is electrically connected is electrically connected, and n is positive integer.

The OLED touch control display apparatus is matched by the analog-digital converter ADC, sequence controller 3 and System on Chip/SoC 4 Close the threshold voltage compensation of the detecting and pixel unit 14 of completing touching signals.

Specifically, referring to Fig. 5, in a preferred embodiment of the invention, being formed with switch in each pixel unit 14 Thin film transistor (TFT) T1, driving thin film transistor (TFT) T2, sensing film transistor T3, storage capacitance C1 and Organic Light Emitting Diode D1 uses the pixel-driving circuit of 3T1C.

The grid of the switching thin-film transistor T1 accesses scanning signal Scan, source electrode incoming data signal Data, drain electrode It is electrically connected the grid of driving thin film transistor (TFT) T2;The source electrode of the driving thin film transistor (TFT) T2 accesses supply voltage, drain electrode electricity Property connection Organic Light Emitting Diode D1 anode;The grid access sensing control signal Sen of the sensing film transistor T3, source Pole is electrically connected the drain electrode of driving thin film transistor (TFT) T2, and drain electrode is electrically connected sense wire;One end of the storage capacitance C1 is electrical The grid of connection driving thin film transistor (TFT) T2, the other end are electrically connected the drain electrode of driving thin film transistor (TFT) T2;Organic light-emitting diodes The minus earth of pipe D1;

Specifically, parasitic capacitance Coled is also formed between the anode and cathode of the Organic Light Emitting Diode D1.

Specifically, the sense wire is connected to the analog-digital converter ADC via a multiplexing module Mux, in addition, also One end including switch a K1, the switch K1 connects the output end of the multiplexer, and the other end connects reference voltage Vcm.A plurality of sense wire is respectively connected to analog-digital converter ADC by the more a accesses of multiplexing module Mux.Specifically, please join Fig. 4 is read, the touch control electrode block 121 is electrically connected via sensing film transistor T3 and the sense wire, specifically, please refers to Fig. 3, the touch control electrode block 121 are electrically connected by the source electrode of a via hole and the sensing film transistor T3, the via hole Through the passivation layer 13, gate insulating layer 142 and interlayer insulating film 144.

Specifically, referring to Fig. 6, the course of work of the OLED touch control display apparatus are as follows: the OLED touch-control display dress It sets in a frame image time, first carries out picture transmission, then carry out touch-control scanning, in a preferred embodiment of the invention, OLED The picture display frequency of touch control display apparatus is 60Hz, i.e. the when a length of 16.7ms of a frame picture, the data-signal Data's Transmission frequency is 120Hz, i.e. the when a length of 8.3ms of data-signal Data transmission, and when picture transmission, scanning signal Scan is opened line by line Switching thin-film transistor T1 is opened, data-signal Data is filled in storage capacitance C1, so that driving thin film transistor (TFT) T2 conducting, simultaneously The source voltage for driving thin film transistor (TFT) T2 is fixed on reference voltage Vcm, Organic Light Emitting Diode D1 hair by switch K1 closure Light, after whole picture element scans, switch K1 is disconnected, and Organic Light Emitting Diode D1 keeps shining, and initially enters touch-control scanning, when When not having finger touch, the capacitor that touch control electrode generates is C2, and a capacitor C3, System on Chip/SoC are in addition generated when there is finger touch The position of 4 sense wires being electrically connected according to touch control electrode block 121 and the timing of sensing control signal Sen determine touch Position specially obtains the abscissa of touch location according to the position for the sense wire for detecting charge variation, is controlled according to sensing Signal Sen current timing obtains the ordinate of touch location, and then determines the position touched.

In addition, the needs of threshold voltage compensation can be in the free time after the touch-control end of scan when being shown according to OLED (Blank) detecting of threshold voltage is added in the stage, realizes the real-time compensation of threshold voltage, can also show in each OLED touch-control The detecting that threshold voltage is carried out when device shuts down, realizes the shutdown compensation of threshold voltage, and time of the detecting of threshold voltage can be with It is accordingly selected as needed, this will not influence realization of the invention.

In conclusion passing through the array base in OLED display panel the present invention provides a kind of OLED touch control display apparatus Touch control electrode is made on plate, and touch control electrode is connected to the analog-digital converter of data driving chip via sense wire, and will show There is the touch-control drive module in technology to be integrated into sequence controller, so that the external compensation by OLED display panel detects mould Block completes touch-control scanning detecting, when touch-control scans, carries out charge detecting by the analog-digital converter in data driving chip, according to The position for the sense wire that touch control electrode block is electrically connected and the timing of sensing control signal determine the position touched, can save Touch chip is gone, the number of chips of OLED touch control display apparatus is reduced, reduces the production cost of OLED touch control display apparatus.

The above for those of ordinary skill in the art can according to the technique and scheme of the present invention and technology Other various corresponding changes and modifications are made in design, and all these change and modification all should belong to the claims in the present invention Protection scope.

Claims (5)

1. a kind of OLED touch control display apparatus characterized by comprising OLED touch-control display panel (1) and the OLED touch-control The timing control that the data driving chip (2) and the data driving chip (2) that display panel (1) is electrically connected are electrically connected Device (3) and the System on Chip/SoC (4) being electrically connected with the sequence controller (3);
The OLED touch-control display panel (1) include: substrate (11), be set to the substrate (11) on touch control electrode layer (12), The pixel of passivation layer (13), the multiple array arrangements being set on the passivation layer (13) on the touch control electrode layer (12) Unit (14);
The data driving chip (2) includes: analog-digital converter (ADC), and the analog-digital converter (ADC) passes through sense wire and institute Pixel unit (14) electric connection is stated, same row pixel unit (14) is electrically connected same sense wire;
The touch control electrode layer (12) includes: several array arrangements and mutually independent touch control electrode block (121), each touch-control Electrode block (121) corresponds to n pixel unit (14), each touch control electrode block (121) and n pixel unit corresponding to it (14) sense wire that a pixel unit (14) in is electrically connected is electrically connected, and n is positive integer;
The OLED touch control display apparatus passes through the analog-digital converter (ADC), sequence controller (3) and System on Chip/SoC (4) The detecting of touching signals and the threshold voltage compensation of pixel unit (14) are completed in cooperation;
When touch-control scans, the position for the sense wire that System on Chip/SoC (4) is electrically connected according to touch control electrode block (121) and sense The timing for controlling signal (Sen) determines the position touched;
Each pixel unit (14) includes: switching thin-film transistor (T1), driving thin film transistor (TFT) (T2), sensing film crystalline substance Body pipe (T3), storage capacitance (C1) and Organic Light Emitting Diode (D1);
The grid of the switching thin-film transistor (T1) accesses scanning signal (Scan), source electrode incoming data signal (Data), leakage Pole is electrically connected the grid of driving thin film transistor (TFT) (T2);The source electrode of driving thin film transistor (TFT) (T2) accesses supply voltage, Drain electrode is electrically connected the anode of organic light emitting diode (D1);The grid access sensing control of the sensing film transistor (T3) Signal (Sen), source electrode are electrically connected the drain electrode of driving thin film transistor (TFT) (T2), and drain electrode is electrically connected sense wire;The storage electricity The one end for holding (C1) is electrically connected the grid of driving thin film transistor (TFT) (T2), and the other end is electrically connected driving thin film transistor (TFT) (T2) Drain electrode;The minus earth of Organic Light Emitting Diode (D1);
The touch control electrode block (121) is electrically connected via sensing film transistor (T3) and the sense wire.
2. OLED touch control display apparatus as described in claim 1, which is characterized in that the touch control electrode block (121) passes through one Via hole and the source electrode of the sensing film transistor (T3) are electrically connected.
3. OLED touch control display apparatus as described in claim 1, which is characterized in that the OLED touch control display apparatus is in a frame In image time, picture transmission is first carried out, then carry out touch-control scanning.
4. OLED touch control display apparatus as claimed in claim 3, which is characterized in that when picture transmission, the data-signal (Data) transmission frequency is 2 times of the picture display frequency of the OLED touch control display apparatus.
5. OLED touch control display apparatus as described in claim 1, which is characterized in that the substrate (11), touch control electrode layer (12) and passivation layer (13) be it is transparent, the light that the pixel unit (14) issues is emitted via substrate (11).
CN201610900647.9A 2016-10-14 2016-10-14 OLED touch control display apparatus CN106406622B (en)

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Publication number Priority date Publication date Assignee Title
CN107039002B (en) * 2017-06-05 2019-09-06 京东方科技集团股份有限公司 A kind of pixel circuit and display panel
CN107134259B (en) * 2017-06-28 2019-04-30 京东方科技集团股份有限公司 Pixel circuit, driving method, display module, driving method and display device
CN107506074A (en) * 2017-08-08 2017-12-22 深圳天珑无线科技有限公司 Touch display screen and touch control terminal
CN108874213B (en) * 2018-06-01 2020-02-11 武汉华星光电半导体显示技术有限公司 Touch display panel and electronic equipment
KR20200016601A (en) * 2018-08-07 2020-02-17 엘지디스플레이 주식회사 Display device
CN109638042B (en) * 2018-12-03 2020-11-24 武汉华星光电半导体显示技术有限公司 OLED display panel
CN109872689A (en) * 2019-03-21 2019-06-11 京东方科技集团股份有限公司 Pixel circuit, touch-control display panel and display device
CN110045875B (en) * 2019-04-28 2020-04-10 深圳市华星光电半导体显示技术有限公司 OLED touch display device and driving method thereof
CN110197645B (en) * 2019-05-20 2020-09-08 深圳市华星光电半导体显示技术有限公司 Driving method and compensation method of pixel circuit
CN110349542A (en) * 2019-07-15 2019-10-18 京东方科技集团股份有限公司 A kind of display panel, display device and its control method

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KR101623776B1 (en) * 2013-12-09 2016-06-07 엘지디스플레이 주식회사 Touch display driver integrated circuit and touch display device
KR102177540B1 (en) * 2013-12-19 2020-11-11 엘지디스플레이 주식회사 Display device with integrated touch screen and method for driviing thereof
CN105895020B (en) * 2016-06-02 2019-07-02 深圳市华星光电技术有限公司 OLED display drive system and OLED display driving method

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Address after: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province

Patentee after: TCL Huaxing Photoelectric Technology Co.,Ltd.

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