CN106873833B - Touch sensing display panel - Google Patents
Touch sensing display panel Download PDFInfo
- Publication number
- CN106873833B CN106873833B CN201710092508.2A CN201710092508A CN106873833B CN 106873833 B CN106873833 B CN 106873833B CN 201710092508 A CN201710092508 A CN 201710092508A CN 106873833 B CN106873833 B CN 106873833B
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- touch
- electrically connected
- sensing
- display panel
- conductive line
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- 239000000758 substrate Substances 0.000 claims abstract description 33
- 230000002093 peripheral effect Effects 0.000 claims description 14
- 238000010586 diagram Methods 0.000 description 8
- 230000003071 parasitic effect Effects 0.000 description 6
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input 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
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input 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
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
Abstract
The invention discloses a touch sensing display panel, comprising: the touch control device comprises a touch control sensing layer, an active element array substrate and a switch unit. The touch sensing layer comprises a plurality of touch sensing units, and each touch sensing unit is electrically connected with a conductive wire. The active element array substrate is arranged opposite to the touch sensing layer and comprises a plurality of data lines. The switch unit comprises a plurality of switches, one end of each switch is electrically connected with at least one of the conducting wires, and the other end of each switch is electrically connected with at least one of the data wires. And during the touch sensing period, the switch is in a conducting state.
Description
Technical Field
The present invention relates to touch sensing panel technology, and more particularly, to a touch sensing display panel.
Background
A touch sensing unit frequently used in an in-cell touch panel is composed of a capacitive touch sensor for sensing a touch of a user and a back-end processing circuit for performing a touch event (touch event) interpretation according to an output signal of the capacitive touch sensor. However, in the current structure, the capacitive touch sensor overlaps with the pixel array (or called active device array substrate) of the panel in a large area, so that the parasitic capacitance is increased and the sensing sensitivity of the capacitive touch sensor is reduced.
Currently, there is a method for reducing parasitic capacitance by outputting the same driving waveform to the capacitive touch sensor and the active device array substrate. The output of the common driving waveform ideally can completely subtract the value of the reduced capacitance, however, in practical applications, the difference of the resistive-capacitive load (RC Loading) at the far and near ends of the panel may cause the waveforms to be not completely consistent after the signals are sent to the capacitive touch sensor and the far and near ends of the active device array substrate, and the mismatch of the resistive-capacitive load at the far and near ends may cause the effect to be poor.
Disclosure of Invention
In order to improve the above disadvantage, the present invention provides a touch sensing display panel, comprising: the touch control device comprises a touch control sensing layer, an active element array substrate and a switch unit. The touch sensing layer comprises a plurality of touch sensing units, and each touch sensing unit is electrically connected with a conductive wire. The active element array substrate is arranged opposite to the touch sensing layer and comprises a plurality of data lines. The switch unit comprises a plurality of switches, one end of each switch is electrically connected with at least one of the conducting wires, and the other end of each switch is electrically connected with at least one of the data wires. And during the touch sensing period, the switch is in a conducting state.
The present invention also provides a touch sensing display panel, including: the touch sensing layer, the active element array substrate and at least one multiplexer.
The touch sensing layer comprises a plurality of touch sensing units, and each touch sensing unit is electrically connected with a conductive wire. The active element array substrate is arranged opposite to the touch sensing layer and comprises a plurality of data lines. Each multiplexer has a first end, a second end and a selection end, wherein each first end is electrically connected with at least one of the conductive lines, and each second end is electrically connected with at least one of the data lines. The first end and the second end of each multiplexer are used for conducting in the touch sensing period.
The touch sensing display panel of the invention eliminates parasitic capacitance by short-circuiting the data lines of the active element array substrate and the conductive lines of the touch sensing layer during touch sensing, and reduces noise generated by sheet resistance difference of the data lines and the conductive lines, thereby improving touch sensing sensitivity. In addition, the resistance of the conductive wire is greatly reduced by short-circuiting the data wire and the conductive wire, thereby reducing the thrust load of the processing unit. Moreover, the power consumed during the touch sensing period only needs to be provided for the processing unit to output the pulse signal to the conductive line, so that the power can be saved. In addition, the touch sensing display panel of the invention can also connect the conductive wires to the common potential during the display period, thereby increasing the stability, reducing the ripple caused by the coupling signals of the data wires and improving the stability of the touch sensing display panel.
Drawings
Fig. 1 is a schematic view of a touch sensing display panel according to a first embodiment of the invention.
Fig. 2 is a schematic circuit diagram of a switch connecting a conductive line and a data line according to an embodiment of the invention.
Fig. 3 is a schematic view of a touch sensing display panel according to a second embodiment of the invention.
FIG. 4 is a circuit diagram illustrating a switch connecting a conductive line and a data line according to another embodiment of the present invention.
Fig. 5 is a schematic view of a touch sensing display panel according to a third embodiment of the invention.
FIG. 6 is a circuit diagram illustrating a multiplexer connecting a conductive line and a data line according to an embodiment of the present invention.
Wherein, the reference numbers:
100. 200 and 300: touch sensing display panel
10: touch sensing layer
11: touch sensing unit
12. 13: conductive wire
20: active element array substrate
21: data line
22: block
30: switch unit
31: switch with a switch body
40: processing unit
41. 42: amplifier with a high-frequency amplifier
50: display area
60: peripheral zone
70: array of cells
71. 80: multiplexer
711: first end
712: second end
713: third terminal
714: selecting terminal
Vcom: common potential
S: control signal
Detailed Description
Fig. 1 is a schematic view of a touch sensing display panel 100 according to a first embodiment of the invention. Referring to fig. 1, a touch sensing display panel 100 includes: the touch sensing layer 10, the active device array substrate 20, the switch unit 30 and the processing unit 40. The touch sensing layer 10 includes a plurality of touch sensing units 11, and each touch sensing unit 11 is electrically connected to the conductive line 12. The active device array substrate 20 is disposed opposite to the touch sensing layer 10. The active device array substrate 20 includes a plurality of data lines 21. Fig. 2 is a schematic circuit diagram illustrating a circuit structure of the switch 31 connecting the conductive line 12 and the data line 21 according to an embodiment of the invention. Referring to fig. 2, each touch sensing unit 11 corresponds to a plurality of pixels (as shown in block 22) of the active device array substrate 20, the conductive line 12 electrically connected to each touch sensing unit 11 is substantially parallel to at least one of the data lines 21, and the conductive line 12 electrically connected to each touch sensing unit 11 is electrically connected to the common potential Vcom of at least one of the pixels.
Referring to fig. 1 and 2, the switch unit 30 includes a plurality of switches 31, and one end of each switch 31 is electrically connected to at least one of the conductive lines 12, and the other end is electrically connected to at least one of the data lines. In the embodiment of the invention, the data lines 21 and the conductive lines 12 are connected to the processing unit 40, the processing unit 40 provides data to the pixels of the active device array substrate 20 through the data lines 21 during the display period of the touch sensing display panel 100, and the processing unit 40 detects the touch sensing event through the conductive lines 12 connected to the touch sensing units 11 during the touch sensing period of the touch sensing display panel 100. In addition, the processing unit 40 is electrically connected to the switch unit 30, and the processing unit 40 sends the control signal S to the switch unit 30 during the touch sensing period to make the switch 31 in the on state, so that the data line 21 and the conductive line 12 are short-circuited, and thus no parasitic capacitance is generated between the data line 21 and the conductive line 12 during the touch sensing period. Furthermore, the resistance of the conductive wire 12 can be further greatly reduced, and the thrust load of the processing unit 40 can be reduced. Furthermore, during the touch sensing period, the consumed power only needs to provide the processing unit 40 to output the pulse signal to the conductive line 12 connected to each touch sensing unit 11, and does not need to output the pulse signal to each data line 21.
In one embodiment, the active device array substrate 20 has a display area 50 and a peripheral area 60 adjacent to the display area 50, and the switch unit 30 and the processing unit 40 may be disposed on the same side of the peripheral area 60. Specifically, the processing unit 40 and the switch unit 30 may be disposed below the active device array substrate 20 in the peripheral region 60.
In another embodiment, the switch unit 30 is disposed in the peripheral region 60, and the processing unit 40 and the switch unit 30 are disposed on two opposite sides of the display region 50. For example, the processing unit 40 and the switch unit 30 can be disposed on the upper and lower sides of the display area 50, respectively.
Fig. 3 is a schematic diagram of a touch sensing display panel 200 according to a second embodiment of the invention. The touch sensing display panel 200 has substantially the same circuit operation as the touch sensing display panel 100 of the first embodiment, except that the processing unit 40 and the switch unit 30 are respectively disposed on the upper and lower sides of the display area 50. In addition, the touch sensing display panel 200 may further include a multiplexer 80, but this is not intended to limit the present invention, and a display panel designer may determine whether to use the multiplexer 80 according to different panel designs. Referring to fig. 3, when the processing unit 40 is disposed on a different side from the switch unit 30, considering the difference of the resistive Loading (RC Loading) of the far and near ends of the panel, the difference of the RC Loading is smaller than that of the switch unit 30 and the processing unit 40 disposed on the same side of the peripheral region 60. In some embodiments, the multiplexer 80 may be electrically connected to the processing unit 40 at one end and electrically connected to the pixels of the active device array substrate 20 through the data lines 21 at the other end. Since one skilled in the art can know that a multiplexer can be added between the source driving unit and the pixels of the active device array substrate, it is not described how to add the multiplexer 80 between the processing unit 40 and the pixels of the active device array substrate.
FIG. 4 is a circuit diagram illustrating a switch connecting a conductive line and a data line according to another embodiment of the present invention. Referring to fig. 4, in the embodiment of the invention, the processing unit 40 may further include an amplifier 41 and an amplifier 42, wherein the amplifier 41 is electrically connected to the multiplexer 80 and provides data to the plurality of pixels of the active device array substrate 20 through the data line 21 (as shown in block 22). Each touch sensing unit 11 corresponds to a pixel block 22 of the active device array substrate 20, the conductive line 12 electrically connected to each touch sensing unit 11 is further electrically connected to another conductive line 13, and the conductive lines 12 and 13 are electrically connected to an amplifier 42 inside the processing unit 40. The amplifier 42 connects the conductive wires 12 and 13 of the touch sensing unit 11 to each other, so as to reduce the thrust load of the processing unit 40.
Fig. 5 is a schematic diagram of a touch-sensing display panel 300 according to a third embodiment of the invention. Fig. 6 is a circuit diagram illustrating the multiplexer 71 connecting the conductive lines and the data lines according to an embodiment of the present invention. The third embodiment of the present invention replaces the switch unit with a multiplexer 71, and like reference characters refer to like elements in the drawings. The multiplexers 71 in fig. 6 can be integrated into a multiplexer array 70 as shown in fig. 5. In addition, the touch sensing display panel 300 may further include a multiplexer 80, but this is not intended to limit the present invention, and a display panel designer may determine whether to use the multiplexer 80 according to different panel designs.
Referring to fig. 5 and 6, each multiplexer 71 has a first terminal 711, a second terminal 712 and a selection terminal 714, wherein each first terminal 711 is electrically connected to at least one of the conductive lines 12 or/and 13, and each second terminal 712 is electrically connected to at least one of the data lines 21. The processing unit 40 is electrically connected to each of the selection terminals 714, and the processing unit 40 sends a control signal S to the selection terminals 714 during the touch sensing period to conduct the first terminal 711 and the second terminal 712 of the multiplexer 71, so that the data line 21 is short-circuited with the conductive line 12 or/and the conductive line 13, and thus no parasitic capacitance is generated between the data line 21 and the conductive line 12 during the touch sensing period.
In some embodiments, the multiplexer 71 further has a third terminal 713, the third terminal 713 is electrically connected to the common voltage Vcom, and the processing unit 40 turns on the first terminal 711 and the third terminal 713 of the multiplexer 71 during the display period. That is, the processing unit 40 connects all the conductive lines to the common potential Vcom by the multiplexer 71 during the display period of the touch sensing display panel 100, wherein the common potential Vcom can be located at an ILB (inner lead Bonding) or an OLB (outer lead Bonding) of the processing unit 40, so as to increase the stability of the common potential Vcom of the touch sensing display panel 100, reduce Ripple (Ripple) caused by signal coupling of the data lines of the active device array substrate, and improve the stability of the touch sensing display panel 100.
The touch sensing display panel of the invention eliminates parasitic capacitance by short-circuiting the data lines of the active element array substrate and the conductive lines of the touch sensing layer during touch sensing, and reduces noise generated by sheet resistance difference of the data lines and the conductive lines, thereby improving touch sensing sensitivity. In addition, the resistance of the conductive wire is greatly reduced by short-circuiting the data wire and the conductive wire, thereby reducing the thrust load of the processing unit. Moreover, the power consumed during the touch sensing period only needs to be provided for the processing unit to output the pulse signal to the conductive line, so that the power can be saved. In addition, the touch sensing display panel of the invention can also connect the conductive wires to the common potential during the display period, thereby increasing the stability, reducing the ripple caused by the coupling signals of the data wires and improving the stability of the touch sensing display panel.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (12)
1. A touch sensing display panel, comprising:
the touch control sensing layer comprises a plurality of touch control sensing units, and each touch control sensing unit is electrically connected with a conductive wire;
the active element array substrate is arranged opposite to the touch sensing layer and comprises a plurality of data lines; and
a switch unit including a plurality of switches, one end of each switch being electrically connected to at least one of the conductive lines, and the other end being electrically connected to at least one of the data lines;
wherein the switches are in a conducting state during a touch sensing period, and the data line and the conductive line are short-circuited at the moment;
each touch sensing unit corresponds to a plurality of pixels of the active element array substrate, and the conductive wire electrically connected with each touch sensing unit is parallel to at least one of the data wires.
2. The touch-sensing display panel of claim 1, further comprising:
a processing unit electrically connected to the switch unit;
the active element array substrate is provided with a display area and a peripheral area adjacent to the display area, and the processing unit and the switch unit are arranged on a first side edge in the peripheral area.
3. The touch-sensing display panel of claim 1, further comprising:
a processing unit electrically connected to the switch unit;
the active element array substrate is provided with a display area and a peripheral area adjacent to the display area, the processing unit and the switch unit are arranged in the peripheral area, and the processing unit and the switch unit are respectively arranged on two opposite sides taking the display area as the center.
4. The touch-sensing display panel of claim 3, wherein the conductive line electrically connected to each touch-sensing unit is further electrically connected to another conductive line, and the conductive line and the another conductive line are electrically connected to an amplifier inside the processing unit.
5. The touch-sensing display panel of claim 2, wherein the conductive line electrically connected to each touch-sensing unit is further electrically connected to another conductive line, and the conductive line and the another conductive line are electrically connected to an amplifier inside the processing unit.
6. The touch-sensing display panel of claim 1, wherein the conductive line electrically connected to each touch-sensing unit is electrically connected to a common potential of at least one of the pixels.
7. A touch sensing display panel, comprising:
the touch control sensing layer comprises a plurality of touch control sensing units, and each touch control sensing unit is electrically connected with a conductive wire;
the active element array substrate is arranged opposite to the touch sensing layer and comprises a plurality of data lines; and
at least one multiplexer, each multiplexer having a first end, a second end and a selection end, each first end being electrically connected to at least one of the conductive lines, each second end being electrically connected to at least one of the data lines;
the first end and the second end of each multiplexer are used for conducting in a touch sensing period, and the data line and the conductive line are short-circuited at the moment;
each touch sensing unit corresponds to a plurality of pixels of the active element array substrate, and the conductive wire electrically connected with each touch sensing unit is parallel to at least one of the data wires.
8. The touch-sensing display panel of claim 7, further comprising:
a processing unit electrically connected to the multiplexer;
the active element array substrate is provided with a display area and a peripheral area adjacent to the display area, and the processing unit and each multiplexer are arranged on a first side edge in the peripheral area.
9. The touch-sensing display panel of claim 8, wherein the conductive line electrically connected to each touch-sensing unit is further electrically connected to another conductive line, and the conductive line and the another conductive line are electrically connected to an amplifier inside the processing unit.
10. The touch-sensing display panel of claim 8, wherein each multiplexer further has a third terminal electrically connected to a common voltage level, and the processing unit turns on the first terminal and the third terminal of each multiplexer during a display period.
11. The touch-sensing display panel of claim 8, wherein the active device array substrate has a display area and a peripheral area adjacent to the display area, each multiplexer is disposed in the peripheral area, and the processing unit and each multiplexer are disposed on two opposite sides of the display area.
12. The touch-sensing display panel of claim 7, wherein the conductive line electrically connected to each touch-sensing unit is electrically connected to a common potential of at least one of the pixels.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW106100383 | 2017-01-06 | ||
| TW106100383A TWI611332B (en) | 2017-01-06 | 2017-01-06 | Touch display panel |
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| Publication Number | Publication Date |
|---|---|
| CN106873833A CN106873833A (en) | 2017-06-20 |
| CN106873833B true CN106873833B (en) | 2020-04-24 |
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| CN201710092508.2A Active CN106873833B (en) | 2017-01-06 | 2017-02-21 | Touch sensing display panel |
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| TW (1) | TWI611332B (en) |
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|---|---|---|---|---|
| TWI750448B (en) * | 2019-01-28 | 2021-12-21 | 友達光電股份有限公司 | Touch display panel |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105022523A (en) * | 2014-04-28 | 2015-11-04 | 乐金显示有限公司 | Touch sensing device and driving method thereof |
| CN105068694A (en) * | 2015-09-07 | 2015-11-18 | 上海天马微电子有限公司 | Touch control display panel and drive method of touch control display panel |
| CN105373271A (en) * | 2014-08-11 | 2016-03-02 | 乐金显示有限公司 | Touch sensor integrated type display device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI596515B (en) * | 2011-10-14 | 2017-08-21 | 劉鴻達 | Touch sensing method with interlacing driving scheme, touch sensing module and display |
| KR101606874B1 (en) * | 2012-12-28 | 2016-03-28 | 엘지디스플레이 주식회사 | Display device with integrated touch screen and method for driving the same |
| TWI576735B (en) * | 2015-06-08 | 2017-04-01 | 群創光電股份有限公司 | Touch display panel and test method thereof |
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2017
- 2017-01-06 TW TW106100383A patent/TWI611332B/en active
- 2017-02-21 CN CN201710092508.2A patent/CN106873833B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105022523A (en) * | 2014-04-28 | 2015-11-04 | 乐金显示有限公司 | Touch sensing device and driving method thereof |
| CN105373271A (en) * | 2014-08-11 | 2016-03-02 | 乐金显示有限公司 | Touch sensor integrated type display device |
| CN105068694A (en) * | 2015-09-07 | 2015-11-18 | 上海天马微电子有限公司 | Touch control display panel and drive method of touch control display panel |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201826100A (en) | 2018-07-16 |
| CN106873833A (en) | 2017-06-20 |
| TWI611332B (en) | 2018-01-11 |
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