CN101587250B - Display device and application method thereof - Google Patents
Display device and application method thereof Download PDFInfo
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- CN101587250B CN101587250B CN2009101398513A CN200910139851A CN101587250B CN 101587250 B CN101587250 B CN 101587250B CN 2009101398513 A CN2009101398513 A CN 2009101398513A CN 200910139851 A CN200910139851 A CN 200910139851A CN 101587250 B CN101587250 B CN 101587250B
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- 238000000034 method Methods 0.000 title claims abstract description 27
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- 230000001360 synchronised effect Effects 0.000 claims description 7
- 230000035945 sensitivity Effects 0.000 abstract description 9
- 239000000758 substrate Substances 0.000 description 24
- 230000008878 coupling Effects 0.000 description 22
- 238000010168 coupling process Methods 0.000 description 22
- 238000005859 coupling reaction Methods 0.000 description 22
- 239000010409 thin film Substances 0.000 description 8
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- 238000010586 diagram Methods 0.000 description 6
- 239000010408 film Substances 0.000 description 6
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- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
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- 101000793359 Homo sapiens Protein YIPF5 Proteins 0.000 description 1
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- 239000004020 conductor Substances 0.000 description 1
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- 239000011521 glass Substances 0.000 description 1
- 102000051002 human YIPF5 Human genes 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention provides a display device and an application method thereof.A shielding conductive layer is used to intervene between a transparent conductive layer of a touch unit and a common electrode layer of a liquid crystal display panel, and the change of a first control signal and a second control signal is controlled to make the induced current between the shielding conductive layer and the transparent conductive layer approach to zero so as to reduce the influence of the capacitive coupling effect generated by the shielding conductive layer or the common electrode layer on the transparent conductive layer on the touch unit, thereby improving the touch sensitivity of the touch unit and reducing the influence of noise.
Description
Technical field
The invention relates to a kind of display device and application process thereof, particularly a kind of display device and application process thereof that can be used for reducing capacitance coupling effect and noise effect.
Background technology
Present touch control display apparatus (Touch Screen) has developed and polytype, and like resistance-type, condenser type, optical profile type, sound wave type, electromagnetic type, image-type etc., it is via contacting with the induction input signal like the direct of finger or special pens with human body; But if list is distinguished with regard to the position of sensor circuit in the touch control display apparatus or the difference of manufacturing process order, these touch control display apparatus mainly can be classified into external hanging type (Add-on) and embedded (Embedded) two kinds.
So-called external hanging type touch control display apparatus promptly is on the outside surface of this display device such as liquid crystal display (LCD) panel; Extra again applying has light-permeable touch control unit (the Touch Panel of sensor circuit; TP) like external hanging type capacitance touching control unit; These external hanging type capacitance touching control unit are to plate indium oxide layer tin thin film (ITO) layer and protective film (Hard Coater) respectively on light-permeable substrate (like a glass) surface, and are provided with one between the ITO layer of this touch control unit and the display panels and prevent disturbance of electronic signal layer (Shielding Layer).
Aforementioned embedded touch display device then is that the light-permeable touch control unit with sensor circuit directly is produced in the touch control display apparatus (like LCD); Because this touch control unit is directly to be made on the display panels of touch control display apparatus; Only need use an ITO layer mostly; So, can reduce the integral thickness of panel, and can keep higher transmittance compared to the external hanging type touch control display apparatus.
Figure 1A promptly shows a kind of sectional view of existing embedded touch display device 1; Its primary structure comprises embedded touch panel 2; For example surface capacitance type (Surface Capacitive) or projected capacitive; And display panels 4, wherein this embedded touch panel 2 is embedded in the upper surface of display panels 4.This display panels 4 comprises that mainly first substrate 16 is provided with colored filter 18, and common electrode (CommonElectrode) layer 20 is formed at colored filter 18 belows, and second substrate 26 and liquid crystal layer 24 are formed between this first substrate 16 and second substrate 26.This embedded touch panel 2 mainly comprises polarizing layer (Polarizer film; PF) 10; First conductive layer 12 is positioned at these polarizing layer 10 belows and first substrate, 16 tops, and patterned electrodes (Patterned Electrodes) layer 14 is formed at first conductive layer, 12 peripheries.Because this first conductive layer 12 is one decks be used for store charge the ITO layer and be provided with the capacitive sensing circuit; As the touch control electrode layer that forms tool high density induction; But because capacitance sensing circuit receives some noises (Noice) easily like the Effects of Noise of Thin Film Transistor-LCD (TFT-LCD) itself or external environment generation and distortion makes its induction incorrect.For example, when this capacitance touching control panel drives, but the drive voltage signal of display panels sees through the normal alignment lines that contact panel 2 manifests the prior setting shown in Fig. 1 C left side when not opening as yet; Yet in case this capacitance touching control panel drives, and the drive voltage signal of display panels 4 is when opening, and what see through that contact panel 2 shows is shown in Fig. 1 C right side, and these lines present shake because of receiving the serious interference of noise.
Shown in Figure 1A and Figure 1B; When human finger 5 these contact panels 2 of contact; Finger 5 with receive between first conductive layer 12 exchanges (AC) electric current and can form a finger inductance capacitance Cf by nature, and the interior static meeting inflow surface of human body is to induce faint induction current I relatively
fTo this capacitor C f charging and flow direction finger 5.Utilize this induction current I
fCurrent value change, can detect the contact point coordinate of finger 5 on panel 2.
Please further with reference to Figure 1A and Figure 1B; Because the common electrode layer 20 of general display panels 4 can receive the control signal that direct current (DC) electric current of about 3～5V starts as display panels 4; Make and form very big coupling capacitance (Coupling Capacitance) C between the common electrode layer 20 of first conductive layer 12 and display panels 4 of contact panel 2 naturally; And this coupling capacitance C makes and flows through inductance capacitance Cf electric current I than big many of aforementioned inductance capacitance Cf
fValue can be very little, and then have influence on the induction on the contact panel 2, to such an extent as to the sensitivity when pointing 5 touching contact panels 2 becomes very poor, is difficult for correct induction or sensed position.
Summary of the invention
A fundamental purpose of the present invention is to provide a kind of display device and application process thereof; Between the transparency conducting layer of extra this touch control unit of increase shield conductive layer intervention and the common electrode layer of display panels; And through controlling the variation of first control signal and second control signal; Reduce the influence of capacitance coupling effect, to improve the touch-control sensitivity of this touch control unit to this touch control unit touch-control sensing.
Another object of the present invention is to provide a kind of display device and application process thereof; Between the transparency conducting layer of extra this touch control unit of increase shield conductive layer intervention and the common electrode layer of display panels, with the noise that stops that external noise or display panels produce.
For reaching the object of the invention; The present invention provides a kind of display device; It comprises: touch control unit and display panels; Wherein this touch control unit comprises: contact layer supplies extraneous contact, transparency conducting layer to be used to receive first control signal, and patterned electrode layer is arranged in this transparency conducting layer periphery.This display panels comprises first substrate, common electrode layer with colored filter and is used to receive drive control signal, second substrate and liquid crystal layer and is formed between this first substrate and second substrate.
In a wherein embodiment of the present invention; Aforementioned touch control unit further has shield conductive layer and is used to receive second control signal; And insulation course is between this transparency conducting layer and shield conductive layer, and wherein this first control signal and second control signal have same potential.
In another embodiment of the present invention; This display panels further has shield conductive layer and is used to receive second control signal; And insulation course is between this common electrode layer and shield conductive layer; Wherein this first control signal and second control signal are inequality, and second control signal is a suspension joint.
The present invention further provides a kind of application process of display device in addition, and this method comprises the following steps:
Make transparency conducting layer receive first control signal, and between transparency conducting layer and contact layer, form first electric capacity, and, make patterned electrode layer transmit first induced signal and come as for this first electric capacity based on the human body contact;
Make shield conductive layer receive second control signal, avoid influencing this first induced signal, and make between this shield conductive layer and the transparency conducting layer and to form second electric capacity and second induced signal this second electric capacity of flowing through with the noise that covers this touch control unit; And
Control the variation of first control signal and second control signal, make the current potential of this first control signal and second control signal identical or synchronously or this first control signal and second control signal is inequality but second control signal is a suspension joint reduces by second induced signal to promote the touch-control sensitivity of first induced signal.
Be with; The present invention is through the variation of this first control signal of control and second control signal; Can make the second induced signal convergence zero that forms between this transparency conducting layer and the shield conductive layer; Event can reduce shield conductive layer or common electrode layer influences the induction of this touch control unit to the capacitance coupling effect of transparency conducting layer, thereby improves the touch-control sensitivity of this touch control unit.
Description of drawings
Figure 1A is the sectional view that shows existing embedded touch display device;
Figure 1B is the capacitive coupling synoptic diagram that the existing embedded touch display device of demonstration Figure 1A is constituted;
Fig. 1 C is that the existing embedded touch display device for Figure 1A demonstrates the synoptic diagram that lines receive noise jamming;
Fig. 2 A is the sectional view that shows a kind of display device according to first preferred embodiment of the present invention;
Fig. 2 B is the capacitive coupling synoptic diagram that display device constituted of displayed map 2A;
Fig. 3 A is the sectional view that shows a kind of display device according to second preferred embodiment of the present invention;
Fig. 3 B is the capacitive coupling synoptic diagram that display device constituted of displayed map 3A;
Fig. 4 A is the sectional view that shows a kind of display device according to the 3rd preferred embodiment of the present invention; And
Fig. 4 B is the capacitive coupling synoptic diagram that display device constituted of displayed map 4A.
Drawing reference numeral:
5 fingers, 91,646,728 shield conductive layer
6,60,70 display device
8,62,72 touch control units, 9,64,74 display panels
80,621,721 contact layers, 82,623,723 transparency conducting layers
84,624,724 patterned electrode layer, 93,644,744 colored filters
94,648,750, common electrode layer 96,652,752 liquid crystal layer
642,742 first substrates 98,654,754 second substrates
650,726 insulation course Cf inductance capacitances
C2, C3 coupling capacitance I
f, the I2 induction current
The S1 first control signal S2 second control signal
Embodiment
Below put up with diagram and specify technology contents of the present invention.
Please consult Fig. 2 A and Fig. 2 B earlier, be a kind of display device 6, mainly comprise according to the first embodiment of the present invention: touch control unit (Toutch Panel, TP) 8, display panels (LCD Panel) 9 and at least one cover (Shielding) conductive layer 91.In present embodiment; This touch control unit 8 can be the contact panel of surface capacitance type (Surface Capacitive), projected capacitive (Projected Capacitive) or other similar technique; Embedded (like thin film-forming method) is in the upper surface of this display panels 9; Its composition comprises: ((Polarizer Film PF), also can be used as diaphragm (HardCoater like polarizing layer to be positioned at outermost smooth polarization contact layer 80; HC) layer uses) supply human body as pointing 5 direct contact, transparency conducting layer 82; For example indium tin oxide films (ITO) is positioned at contact layer 80 belows and receives the first control signal S1, and is arranged in this transparency conducting layer 82 peripheries by patterned electrodes (Patterned Electrodes) layer 84 that a plurality of conductive electrodes constitute, and electrically connects with transparency conducting layer 82; And transmit the first control signal S1, on this transparency conducting layer 82, form induced signal such as the induction current I that electric field goes out with the human body electrostatic induction
fValue.
This display panels 9 comprises the first substrate (not shown), colored filter 93, common electrode (Common Electrode) layer 94 like Thin Film Transistor-LCD (TFT-LCD) and is formed at colored filter 93 belows and receives direct current (DC) drive control signal enabling showing this display panels 9, second substrate 98 as a thin film transistor (TFT) array (TFT Array) substrate, and liquid crystal layer 96 is formed between this first and second substrate.
This shield conductive layer 91; For example can be an additional conductive layer ITO; Be arranged between the common electrode layer 94 of transparency conducting layer and this display panels 9 of this touch control unit 8, be used to receive the second control signal S2 to cover the noise that suffered external noise of this touch control unit 8 or display panels 9 produce.
When finger 5 does not touch contact layer 80 outside surfaces of this touch control unit 8; Patterned electrode layer 84 is actually and is transmitting the first control signal S1 (as exchanging (AC) electric current) formation one uniform electric field on transparency conducting layer 82; Make it have same potential, so do not have induction current on this touch control unit 8 and pass through.When in case the contact layer 80 of finger 5 these touch control units 8 of contact is arranged; Shown in Fig. 2 A and Fig. 2 B; Because of human body is a good conductor; Make between finger 5 and the transparency conducting layer 82 that receives the first control signal S1 (about contact layer 80 positions) to understand nature and form an inductance capacitance Cf; Promptly be somebody's turn to do finger 5 and transparency conducting layer 82 the two poles of the earth as this capacitor C f, the static electricity on human body that contact layer 80 brought who points 5 these touch control units 8 of touching simultaneously changes aforementioned electrostatic field as forming external world's touching signal inflow surface, makes patterned electrode layer 84 transmit faint induction current I
f, this induction current I
fVia the conduction of transparency conducting layer 82, to this inductance capacitance Cf charging and flow direction finger 5.Utilize and produce this induction current I
fCurrent value, can detect finger 5 contact point coordinates on touch control unit 8.
Same because the influence of capacitance coupling effect; Receive the first control signal S1 touch control unit 8 transparency conducting layer 82 and receive between the shield conductive layer 91 of the second control signal S2 can nature to form a coupling capacitance C2 and to form an induction current I2 and flow to shield conductive layer 91 via coupling capacitance C2, and also can form a coupling capacitance C3 naturally between the shield conductive layer 91 of the common electrode layer 94 that receives dc control signal and the reception second control signal S2 and form the induction current coupling capacitance C3 that flows through.When changing through the accurate position of controlling this first control signal S1 and the second control signal S2; Can change the current value size of induction current I2; Even control that this induction current I2 is minimum to level off to zero; To hinder the current lead-through between transparency conducting layer 82 and the shield conductive layer 91; It can't can be avoided the capacitance coupling effect of formation between common electrode layer 94 or shield conductive layer 91 and the transparency conducting layer 82 to have influence on the induction on the touch control unit 8, that is have influence on this induced signal I for fear of induction current I2 coupling capacitance C2 charging by this
f, utilize to reduce current value (the induced signal I for example of induction current I2
fGreater than induction current I2) the touch-control sensitivity that improves this touch control unit 8.
Other please refer to Fig. 3 A and Fig. 3 B, is a kind of display device 60 according to second preferred embodiment of the present invention, mainly comprises: touch control unit 62 and display panels 64.This touch control unit 62 has contact layer 621, transparency conducting layer 623 equally, and for example indium tin oxide films (ITO) the reception first control signal S1, and patterned electrode layer 624 is arranged in this transparency conducting layer 623 peripheries, and electrically connects with transparency conducting layer 623.
This display panels 64 is like Thin Film Transistor-LCD; Comprising first substrate 642, colored filter 644, shield conductive layer 646 (like the ITO layer) is located at colored filter 644 belows and receives the second control signal S2 and receive a direct current (DC) control signals to enable this display panels 64, insulation (like Overcoat with noise, the common electrode layer 648 that the external noise that covers this touch control unit 62 or display panels 64 produce; OC) layer 650 be located at shield conductive layer 646 with jointly between the electrode layer 648 be electrically insulated, second substrate 654 (like thin film transistor (TFT) array (TFT Array) substrate); And liquid crystal layer 652 is formed between this first and second substrate 642,654.
Same; When finger 5 these touch control units 62 of contact; Shown in Fig. 3 A and Fig. 3 B; (about contact layer 621 positions) can form an inductance capacitance Cf by nature between the transparency conducting layer 623 of finger 5 and the reception first control signal S1, and the static electricity on human body can make patterned electrode layer 624 transmit faint induction current I as forming an extraneous signal of touching simultaneously
f, this induction current I
fVia the conduction of transparency conducting layer 623 to this inductance capacitance C
fCharging also flows to finger 5.
Though receive the transparency conducting layer 623 of the first control signal S1 and receive between the shield conductive layer 646 of the second control signal S2 can nature to form a coupling capacitance C2 and to form an induction current I2 and flow to shield conductive layer 646 via coupling capacitance C2; And also can form a coupling capacitance C3 naturally between the shield conductive layer 646 of the common electrode layer 648 that receives dc control signal and the reception second control signal S2 and form the induction current coupling capacitance C3 that flows through; But wherein this first control signal S1 is made as an AC signal; And the second control signal S2 is made as suspension joint; That is do not take over what signal source; Can hinder the current lead-through between transparency conducting layer 623 and the shield conductive layer 646, be decreased to sense of control induced current I2 and level off to zero, that is utilize the current value that reduces induction current I2 (induced signal I for example
fGreater than induction current I2) avoid induction current I2 to have influence on this induced signal I
f, to improve the touch-control sensitivity of this touch control unit 62.
Other please refer to Fig. 4 A and Fig. 4 B, is a kind of display device 70 according to the 3rd preferred embodiment of the present invention, mainly comprises: touch control unit 72 and display panels 74.Be different from second embodiment; The touch control unit 72 of the 3rd embodiment have contact layer 721, transparency conducting layer 723 for example indium tin oxide films (ITO) be used to receive the first control signal S1, shield conductive layer 728 (like the ITO layer) and be used to receive the second control signal S2 to cover outside this touch control unit 72 noise that produces at noise or display panels 74, insulation (like Overcoat; OC) layer 726 is located between shield conductive layer 728 and the transparency conducting layer 723 being electrically insulated, and as induced signal I
fThe patterned electrode layer 724 that transmits is positioned at the neighboring area of transparency conducting layer 723 and electrically connects with transparency conducting layer 723.
This display panels 74 is like Thin Film Transistor-LCD; Comprising first substrate 742, colored filter 744, common electrode layer 750 is located at colored filter 744 belows and receives direct current (DC) drive control signal to enable to show this display panels 74, second substrate 754 (like thin film transistor (TFT) array (TFTArray) substrate); And liquid crystal layer 752 is formed between this first and second substrate 742,754.
When finger 5 these touch control units 72 of contact; Shown in Fig. 4 A and Fig. 4 B; Can form an inductance capacitance Cf by nature between the transparency conducting layer 723 of finger 5 and the reception first control signal S1; The static electricity on human body that finger brings can make patterned electrode layer 724 transmit faint induction current I as forming an extraneous touching signal
f, this induction current I
fConduction via transparency conducting layer 723 points 5 to this inductance capacitance Cf charging and the flow direction.Receive the transparency conducting layer 723 of the first control signal S1 and receive between the shield conductive layer 728 of the second control signal S2 can nature to form a coupling capacitance C2 and to form an induction current I2 and flow to shield conductive layer 728, and also can form a coupling capacitance C3 naturally between the shield conductive layer 728 of the common electrode conductive layer 750 that receives dc control signal and the reception second control signal S2 and form the induction current coupling capacitance C3 that flows through via coupling capacitance C2.Wherein utilize this first control signal S1 to connect identical alternating-current voltage source with the second control signal S2; Or install an operational amplifier (OP) divided circuit additional with partial current; Be that this first control signal of may command is identical or synchronous with the current potential of second control signal; Induction current I2 to reduce between this transparency conducting layer 723 and the shield conductive layer 728 is zero to leveling off to; Hinder the current lead-through between transparency conducting layer 723 and the shield conductive layer 728; Make it can't be to coupling capacitance C2 charging, the capacitance coupling effect that can avoid by this forming between common electrode layer 750 or shield conductive layer 728 and the transparency conducting layer 723 has influence on the electric field induction on the touch control unit 72, that is utilizes current value (the induced signal I for example of reduction induction current I2
fGreater than induction current I2) avoid induction current I2 to have influence on this induced signal I
f, to improve the touch-control sensitivity of this touch control unit 72.
In addition, a preferred embodiment of the present invention further provides a kind of application process of touch control display apparatus, and this method comprises the following steps (asking simultaneously with reference to Fig. 4 A):
Display panels is provided; Display panels has common electrode layer at least; And provide touch control unit to be embedded on the display panels and have contact layer, transparency conducting layer, patterned electrode layer be arranged in this transparency conducting layer periphery and electrically connect with transparency conducting layer 623, shield conductive layer, and insulation course is located between transparency conducting layer and the shield conductive layer;
Make transparency conducting layer receive first control signal; And formation first electric capacity in the contact layer between transparency conducting layer and shield conductive layer; And based on the human body contact static that this contact layer produced as forming extraneous touching signal, can make corresponding first induced signal that produces of patterned electrode layer to flow to this first electric capacity via this transparency conducting layer;
Make shield conductive layer receive second control signal, covering the suffered noise of this touch control unit, and make and form second electric capacity and second induced signal this second electric capacity of flowing through between this shield conductive layer and the transparency conducting layer; And
Through variation such as the accurate position of controlling first control signal and second control signal, as make this first control signal identical or synchronous, control second induced signal by this less than first induced signal, even level off to zero with the current potential of second control signal.
In addition, another preferred embodiment of the present invention further provides a kind of application process of touch control display apparatus, and this method comprises the following steps (asking simultaneously with reference to Fig. 3 A):
Display panels is provided; Display panels has common electrode layer, shield conductive layer and insulation course at least to be located between common electrode layer and the shield conductive layer, and provides touch control unit to be embedded on the display panels and have the lower floor that contact layer, transparency conducting layer and patterned electrode layer are positioned at transparency conducting layer and contact layer;
Make transparency conducting layer receive first control signal; And formation first electric capacity in the contact layer between transparency conducting layer and shield conductive layer; And based on the human body contact static that this contact layer produced as forming extraneous touching signal, can make corresponding first induced signal that produces of patterned electrode layer to flow to this first electric capacity via this transparency conducting layer;
Make shield conductive layer receive second control signal, covering the suffered noise of this touch control unit, and make and form second electric capacity and second induced signal this second electric capacity of flowing through between this shield conductive layer and the transparency conducting layer; And
Control the variation of first control signal and second control signal, making inequality and second control signal of this first control signal and second control signal is suspension joint, controls second induced signal by this less than first induced signal, even levels off to zero.
Based on aforementioned; A kind of display device provided by the invention and application process thereof; Be to utilize the shield conductive layer of extra increase to get involved between the common electrode layer of transparency conducting layer and display panels of this touch control unit; And through controlling the accurate position variation of first control signal and second control signal; Induction current between shield conductive layer and the touch control unit transparency conducting layer is decreased to levels off to zero, to reduce shield conductive layer or common electrode layer the capacitance coupling effect that transparency conducting layer produces is had influence on the electric field induction of this touch control unit, that is avoid having influence on the induced signal I of finger touch
f, the touch-control sensitivity that can improve this touch control unit by this, the noise that also can be used as from display panels of this shield conductive layer stops simultaneously, and then reduces Effects of Noise.
In sum, the present invention meets the patent of invention important document, proposes patented claim in accordance with the law.The above person is merely preferred embodiment of the present invention, those skilled in the art of the present technique, and the equivalence of under the spiritual framework according to the present invention, being done is modified or is changed, and all should be contained in the claim scope.
Claims (30)
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101398513A CN101587250B (en) | 2009-07-03 | 2009-07-03 | Display device and application method thereof |
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|---|---|---|---|
| CN2009101398513A CN101587250B (en) | 2009-07-03 | 2009-07-03 | Display device and application method thereof |
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| CN101587250B true CN101587250B (en) | 2012-01-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI511001B (en) * | 2014-04-09 | 2015-12-01 | Generalplus Technology Inc | Apparatus with both touch sensing and electrical field sensing functions and interactive apparatus using the same |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102087564B (en) * | 2009-12-03 | 2013-08-21 | 瑞鼎科技股份有限公司 | Device and method for eliminating coupling capacitance |
| JP5496851B2 (en) * | 2010-10-22 | 2014-05-21 | 株式会社ジャパンディスプレイ | Touch panel |
| CN103165072B (en) * | 2011-12-15 | 2015-06-24 | 群康科技(深圳)有限公司 | Touch device and driving method thereof |
| US9152283B2 (en) * | 2013-06-27 | 2015-10-06 | Synaptics Incorporated | Full in-cell sensor |
| CN114546158A (en) * | 2015-03-17 | 2022-05-27 | 株式会社半导体能源研究所 | touch screen |
| TWI683292B (en) * | 2018-09-20 | 2020-01-21 | 友達光電股份有限公司 | Pixel array substrate |
| CN112799538B (en) * | 2021-01-19 | 2024-03-15 | 京东方科技集团股份有限公司 | Touch driving method, touch driving device and touch display device |
-
2009
- 2009-07-03 CN CN2009101398513A patent/CN101587250B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI511001B (en) * | 2014-04-09 | 2015-12-01 | Generalplus Technology Inc | Apparatus with both touch sensing and electrical field sensing functions and interactive apparatus using the same |
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