CN103927071A - Touch display panel and touch display device - Google Patents
Touch display panel and touch display device Download PDFInfo
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- CN103927071A CN103927071A CN201310724496.2A CN201310724496A CN103927071A CN 103927071 A CN103927071 A CN 103927071A CN 201310724496 A CN201310724496 A CN 201310724496A CN 103927071 A CN103927071 A CN 103927071A
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Abstract
The invention discloses a touch display panel and a touch display device. The touch display panel comprises a plurality of first common electrode lines on a TFT array substrate and a plurality of second common electrodes on a color film substrate; at least two first common electrode lines are electrically connected to form a first-directional coil; at least two second common electrodes are electrically connected to form a second-directional coil. During image displaying, same common voltage is applied to all first common electrode lines and all second common electrodes. During touch detecting, the independent first-directional coils formed by all first common electrode lines sense electromagnetic signals and output sensing current to determine second-directional coordinates of a touch position; the independent second-directional coils formed by all second common electrodes sense the electromagnetic signals and output the sensing current to determine first-directional coordinates of the touch position. The touch display panel and the touch display device have the advantages that displaying of the touch display panel and electromagnetic touch control are integrated, the touch display panel can be lightened and thinned and production cost can be reduced accordingly.
Description
Technical field
The present invention relates to display technique field, relate in particular to a kind of touch display panel and touch display unit.
Background technology
Along with the develop rapidly of display technique, touch-screen (Touch Panel) spreads all in people's life gradually.With the traditional monitor of Presentation Function only can be provided compare, use the display of touch-screen can make user and show between main control system to carry out information interaction, therefore, touch-control is touched screen can be completely or replaced at least partly conventional input media, existing display not only can be shown, can also touch control.
Common touch-screen is divided into resistive touch screen, capacitive touch screen, electromagnetical type touch screen and infrared ray interrupter-type touch-screen etc.Existing electromagnetical type touch screen, TN type display panel for example, be generally to adopt external hanging type to fit together display panels and the module with electromagnetism input function, and the module with electromagnetism input function need to be arranged on the printed circuit board (PCB) of non-display area.Can make like this thickness, weight and the cost of existing electromagnetical type touch screen increase significantly.
Summary of the invention
The invention provides a kind of touch display panel and touch display unit, solved the technical matters that in prior art, the thickness of electromagnetical type touch screen, weight and cost increase.
First aspect, the embodiment of the present invention provides a kind of touch display panel, comprises the color membrane substrates and the tft array substrate that are oppositely arranged, and is arranged at the liquid crystal layer between described color membrane substrates and tft array substrate, and described touch display panel also comprises:
Described tft array substrate comprises many first public electrode wires, and at least two described the first public electrode wires are electrically connected to and form first direction coil;
Described color membrane substrates comprises many second public electrodes, and at least two described the second public electrodes are electrically connected to and form second direction coil;
When image shows, all described the first public electrode wires and all described the second public electrodes are all applied in same common electric voltage;
Touch while detecting, all described the first public electrode wires form the independently coil-induced electromagnetic signal of a plurality of first directions, and export induction current to determine the second direction coordinate of touch location, all described the second public electrodes form the independently coil-induced electromagnetic signal of a plurality of second directions, and export induction current to determine the first direction coordinate of touch location.
Second aspect, the embodiment of the present invention also provides a kind of touch display unit, comprises touch display panel as above.
The embodiment of the present invention at least reaches one of following effect: touch display panel and touch display unit that the embodiment of the present invention proposes, by at least two the first public electrode wires that are positioned on tft array substrate are electrically connected to formation first direction coil, at least two the second public electrodes that are positioned on color membrane substrates are electrically connected to formation second direction coil, and when image shows, all the first public electrode wires and all the second public electrodes are all applied in same common electric voltage, when touching detection, all the first public electrode wires form the independently coil-induced electromagnetic signal of a plurality of first directions, and export induction current to determine the second direction coordinate of touch location, all the second public electrodes form the independently coil-induced electromagnetic signal of a plurality of second directions, and export induction current to determine the first direction coordinate of touch location.Make like this touch display panel normally show, and touching while detecting without increasing extra electromagnetism touch control component, just can realize respectively Presentation Function and electromagnetism touch controllable function, thereby make touch display panel realize demonstration and touch control integratedization of electromagnetism, and then make touch display panel more lightening, also reduce production cost, simplified the technological process of production, improved product yield.
Accompanying drawing explanation
By reading the detailed description that non-limiting example is done of doing with reference to the following drawings, it is more obvious that other features, objects and advantages of the present invention will become:
Fig. 1 is the section of structure of TN type display panels;
Fig. 2 is according to the structural representation of the touch display panel of the embodiment of the present invention;
Fig. 3 is according to the first structural representation of the first direction coil of the touch display panel of the embodiment of the present invention and second direction coil;
Fig. 4 is according to the second structural representation of the first direction coil of the touch display panel of the embodiment of the present invention and second direction coil;
Fig. 5 is according to the third structural representation of the first direction coil of the touch display panel of the embodiment of the present invention and second direction coil;
Fig. 6 is according to the 4th of the first direction coil of the touch display panel of the embodiment of the present invention and second direction coil the kind of structural representation;
Fig. 7 is according to the 5th of the first direction coil of the touch display panel of the embodiment of the present invention and second direction coil the kind of structural representation;
Fig. 8 is according to the 6th of the first direction coil of the touch display panel of the embodiment of the present invention and second direction coil the kind of structural representation;
Fig. 9 is according to the 7th of the first direction coil of the touch display panel of the embodiment of the present invention and second direction coil the kind of structural representation;
Figure 10 is according to the 8th of the first direction coil of the touch display panel of the embodiment of the present invention and second direction coil the kind of structural representation;
Figure 11 is according to the 9th of the first direction coil of the touch display panel of the embodiment of the present invention and second direction coil the kind of structural representation;
Figure 12 is according to the fundamental diagram of the first direction coil of the touch display panel of the embodiment of the present invention and second direction coil.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.Be understandable that, specific embodiment described herein is only for explaining the present invention, but not limitation of the invention.It also should be noted that, for convenience of description, in accompanying drawing, only show part related to the present invention but not full content.
The display panel of liquid crystal has a variety of, and wherein, TN type display panels is very common a kind of display panels.Fig. 1 is the section of structure of TN type display panels.Referring to Fig. 1, TN type display panels comprises: color membrane substrates 11 and with tft array substrate 12 and the liquid crystal layer 13 between color membrane substrates 11 and tft array substrate 12 of the corresponding setting of color membrane substrates 11, and be provided with common electrode layer 14 and towards a side of liquid crystal layer 13, be provided with public electrode wire 15 and pixel electrode 16 at tft array substrate 12 towards a side of liquid crystal layer 13 at color membrane substrates 11, wherein, common electrode layer 14 is paved with the whole viewing area of TN type display panels.When showing, common electrode layer 14 and pixel electrode 16 form the electric field that the liquid crystal molecule in liquid crystal layer 13 is deflected.
The embodiment of the present invention provides a kind of touch display panel and touch display unit.Fig. 2 is according to the structural representation of the touch display panel of the embodiment of the present invention.Referring to Fig. 2, touch display panel comprises: the color membrane substrates 21 being oppositely arranged and tft array substrate 22, and be arranged at the liquid crystal layer 23 between color membrane substrates 21 and tft array substrate 22, tft array substrate 22 comprises that 24, at least two the first public electrode wires 24 of many first public electrode wires are electrically connected to formation first direction coil; Color membrane substrates 21 comprises that 25, at least two the second public electrodes 25 of many second public electrodes are electrically connected to formation second direction coil; When image shows, all the first public electrode wires 24 and all the second public electrodes 25 are all applied in same common electric voltage; Touch while detecting, all the first public electrode wires 24 form the independently coil-induced electromagnetic signal of a plurality of first directions, and export induction current to determine the second direction coordinate of touch location, all the second public electrodes 25 form the independently coil-induced electromagnetic signal of a plurality of second directions, and export induction current to determine the first direction coordinate of touch location.
Referring to Fig. 2, many the second public electrode 25 is positioned on color membrane substrates 21, touch display panel in the present embodiment is TN type display panels, under image display status, the second public electrode 25 on color membrane substrates 21 forms vertical electric field with the pixel electrode (not shown in Fig. 2) on tft array substrate 22, so that the liquid crystal molecule 231 in the liquid crystal layer 23 between color membrane substrates 21 and tft array substrate 22 twists.
Further, the shape of first direction coil is extended along first direction, but a plurality of first direction coil is arranged along second direction; The shape of second direction coil is extended along second direction, but a plurality of second direction coil is arranged along first direction.In the present embodiment, first direction coil and second direction coil are U-shaped coil.
Optionally, tft array substrate also comprises multi-strip scanning line (not shown in Fig. 2), and the first public electrode wire 24 is positioned at same layer with sweep trace, and further, common the first public electrode wire 24 can be arranged to parallel with sweep trace.
In the present embodiment, the first public electrode wire 24 and the second public electrode 25 are bar shaped.
Optionally, at least a row or column pixel is contained in the second projection of public electrode 25 on tft array substrate 22.Specifically, when making the second public electrode 25, can, according to actual conditions, the width of the second public electrode 25 be rationally set can cover at least pixel of a row or column.
Optionally, the material of the first public electrode wire 24 is metal or transparent conductive material, the material of the second public electrode 25 is transparent conductive material, and wherein, transparent conductive material can be the combination of any one or they in indium tin oxide (ITO), indium-zinc oxide (IZO).Because the present embodiment is TN type lcd touch display panel, under show state, on color membrane substrates 21, the second public electrode 25 forms vertical electric field with the pixel electrode on tft array substrate, in order to make the electric field of viewing area of whole touch display panel even, the second public electrode 25 of being made by transparent conductive material can be paved with the whole viewing area of color membrane substrates 21.
In the present embodiment, at least two the first public electrode wires 24 are electrically connected to and form first direction coil and at least two the second public electrodes 25 electrical connection formation second direction coils.Below in conjunction with Fig. 3-Figure 11, further illustrate several implementations of first direction coil and second direction coil.
Fig. 3 is according to the first structural representation of the first direction coil of the touch display panel of the embodiment of the present invention and second direction coil.Referring to Fig. 3, in a concrete example of the present invention, two adjacent the first public electrode wires 24 are one group, and one end of any two first public electrode wires 24 of each group is electrically connected to form first direction coil by wire.
Similarly, also referring to Fig. 3, in a concrete example of the present invention, two adjacent the second public electrodes 25 are one group, and one end of any two second public electrodes 25 of each group is electrically connected to form second direction coil by wire.
Fig. 4 is according to the second structural representation of the first direction coil of the touch display panel of the embodiment of the present invention and second direction coil.Referring to Fig. 4, in a concrete example of the present invention, three adjacent the first public electrode wires are one group, and wherein, three adjacent first public electrode wires of each group are followed successively by the first sub-electrode 241, the second sub-electrode 242 and the 3rd sub-electrode 243; The first sub-electrode 241 is electrically connected to by wire at first end with the 3rd sub-electrode 243, the second sub-electrode 242 is electrically connected to by wire at the second end with the 3rd sub-electrode 243, to form first direction coil, wherein, first end and the second end lay respectively at the different two ends of three sub-electrodes.
Similarly, also referring to Fig. 4, in a concrete example of the present invention, three adjacent the second public electrodes are one group, and wherein, three adjacent second public electrodes of each group are followed successively by the 4th sub-electrode 251, the 5th sub-electrode 252 and the 6th sub-electrode 253; The 4th sub-electrode 251 is electrically connected to by wire at first end c with the 6th sub-electrode 253, the 5th sub-electrode 252 is electrically connected to by wire at the second end d with the 6th sub-electrode 253, to form second direction coil, wherein, first end and the second end lay respectively at the different two ends of three sub-electrodes.
Fig. 5 is according to the third structural representation of the first direction coil of the touch display panel of the embodiment of the present invention and second direction coil.Referring to Fig. 5, in a concrete example of the present invention, three adjacent the first public electrode wires are one group, and wherein, three adjacent first public electrode wires of each group are followed successively by the first sub-electrode 241, the second sub-electrode 242 and the 3rd sub-electrode 243; The first sub-electrode 241 is electrically connected to by wire at first end with the second sub-electrode 242, and the second sub-electrode 242 is electrically connected to by wire at first end with the 3rd sub-electrode 243, to form first direction coil.
Similarly, also referring to Fig. 5, in a concrete example of the present invention, three adjacent the second public electrodes are one group, and wherein, three adjacent second public electrodes of each group are followed successively by the 4th sub-electrode 251, the 5th sub-electrode 252 and the 6th sub-electrode 253; The 4th sub-electrode 251 is electrically connected to by wire at first end with the 5th sub-electrode 252, and the 5th sub-electrode 252 is electrically connected to by wire at first end with the 6th sub-electrode 253, to form second direction coil.
Fig. 6 is according to the 4th of the first direction coil of the touch display panel of the embodiment of the present invention and second direction coil the kind of structural representation.Referring to Fig. 6, in a concrete example of the present invention, three adjacent the first public electrode wires are one group, and wherein, three adjacent first public electrode wires of each group are followed successively by the first sub-electrode 241, the second sub-electrode 242 and the 3rd sub-electrode 243; The first sub-electrode 241 is electrically connected to by wire at first end with the 3rd sub-electrode 243, the second sub-electrode 242 is electrically connected to by wire at the second end with the 3rd sub-electrode 243, to form first direction coil, wherein, first end and the second end lay respectively at the different two ends of three sub-electrodes.
Similarly, also referring to Fig. 6, in a concrete example of the present invention, two adjacent the second public electrodes 25 are one group, and one end of any two second public electrodes 25 of each group is electrically connected to form second direction coil by wire.
Fig. 7 is according to the 5th of the first direction coil of the touch display panel of the embodiment of the present invention and second direction coil the kind of structural representation.Referring to Fig. 7, in a concrete example of the present invention, three adjacent the first public electrode wires are one group, and wherein, three adjacent first public electrode wires of each group are followed successively by the first sub-electrode 241, the second sub-electrode 242 and the 3rd sub-electrode 243; The first sub-electrode 241 is electrically connected to by wire at first end with the second sub-electrode 242, and the second sub-electrode 242 is electrically connected to by wire at first end with the 3rd sub-electrode 243, to form first direction coil.
Similarly, also referring to Fig. 7, in a concrete example of the present invention, two adjacent the second public electrodes 25 are one group, and one end of any two second public electrodes 25 of each group is electrically connected to form second direction coil by wire.
Fig. 8 is according to the 6th of the first direction coil of the touch display panel of the embodiment of the present invention and second direction coil the kind of structural representation.Referring to Fig. 8, in a concrete example of the present invention, two adjacent the first public electrode wires 24 are one group, and one end of any two first public electrode wires 24 of each group is electrically connected to form first direction coil by wire.
Similarly, also referring to Fig. 8, in a concrete example of the present invention, three adjacent the second public electrodes are one group, and wherein, three adjacent second public electrodes of each group are followed successively by the 4th sub-electrode 251, the 5th sub-electrode 252 and the 6th sub-electrode 253; The 4th sub-electrode 251 is electrically connected to by wire at first end c with the 6th sub-electrode 253, the 5th sub-electrode 252 is electrically connected to by wire at the second end d with the 6th sub-electrode 253, to form second direction coil, wherein, first end c and the second end d lay respectively at the different two ends of three sub-electrodes.
Fig. 9 is according to the 7th of the first direction coil of the touch display panel of the embodiment of the present invention and second direction coil the kind of structural representation.Referring to Fig. 9, in a concrete example of the present invention, three adjacent the first public electrode wires are one group, and wherein, three adjacent first public electrode wires of each group are followed successively by the first sub-electrode 241, the second sub-electrode 242 and the 3rd sub-electrode 243; The first sub-electrode 241 is electrically connected to by wire at first end with the second sub-electrode 242, and the second sub-electrode 242 is electrically connected to by wire at first end with the 3rd sub-electrode 243, to form first direction coil.
Similarly, also referring to Fig. 9, in a concrete example of the present invention, three adjacent the second public electrodes are one group, and wherein, three adjacent second public electrodes of each group are followed successively by the 4th sub-electrode 251, the 5th sub-electrode 252 and the 6th sub-electrode 253; The 4th sub-electrode 251 is electrically connected to by wire at first end c with the 6th sub-electrode 253, the 5th sub-electrode 252 is electrically connected to by wire at the second end d with the 6th sub-electrode 253, to form second direction coil, wherein, first end and the second end lay respectively at the different two ends of three sub-electrodes.
Figure 10 is according to the 8th of the first direction coil of the touch display panel of the embodiment of the present invention and second direction coil the kind of structural representation.Referring to Figure 10, in a concrete example of the present invention, two adjacent the first public electrode wires 24 are one group, and one end of any two first public electrode wires 24 of each group is electrically connected to form first direction coil by wire.
Similarly, also referring to Figure 10, in a concrete example of the present invention, three adjacent the second public electrodes are one group, and wherein, three adjacent second public electrodes of each group are followed successively by the 4th sub-electrode 251, the 5th sub-electrode 252 and the 6th sub-electrode 253; The 4th sub-electrode 251 is electrically connected to by wire at first end with the 5th sub-electrode 252, and the 5th sub-electrode 252 is electrically connected to by wire at first end with the 6th sub-electrode 253, to form second direction coil.
Figure 11 is according to the 9th of the first direction coil of the touch display panel of the embodiment of the present invention and second direction coil the kind of structural representation.Referring to Figure 11, in a concrete example of the present invention, three adjacent the first public electrode wires are one group, and wherein, three adjacent first public electrode wires of each group are followed successively by the first sub-electrode 241, the second sub-electrode 242 and the 3rd sub-electrode 243; The first sub-electrode 241 is electrically connected to by wire at first end with the 3rd sub-electrode 243, the second sub-electrode 242 is electrically connected to by wire at the second end with the 3rd sub-electrode 243, to form first direction coil, wherein, first end and the second end lay respectively at the different two ends of three sub-electrodes.
Similarly, also referring to Figure 11, in a concrete example of the present invention, three adjacent the second public electrodes are one group, and wherein, three adjacent second public electrodes of each group are followed successively by the 4th sub-electrode 251, the 5th sub-electrode 252 and the 6th sub-electrode 253; The 4th sub-electrode 251 is electrically connected to by wire at first end with the 5th sub-electrode 252, and the 5th sub-electrode 252 is electrically connected to by wire at first end with the 6th sub-electrode 253, to form second direction coil.
It should be noted that, after in above-mentioned, " first end " of each sub-electrode of the first public electrode wire and the second public electrode and " the second end " refers to that the first public electrode wire and the second public electrode are arranged on corresponding substrate, be positioned at the not two ends of homonymy of corresponding substrate, be positioned at corresponding substrate one side and be called " first end ", be positioned at so the opposite side that substrate is relative with being somebody's turn to do " first end " and be called " the second end ".
In Fig. 3-Figure 11, selected two or three adjacent first public electrode wires to be electrically connected to and formed first direction coil and selected two or three adjacent second public electrodes to be electrically connected to formation second direction coil, respectively as several implementations of first direction coil and second direction coil, yet, in manufacturing process, can be according to circumstances, select arbitrarily two or three or more the first public electrode wire to be electrically connected to form first direction coil and select arbitrarily two or three or more the second public electrode to be electrically connected to and form second direction coil.
And, the various structures of the first direction coil shown in Fig. 3-Figure 11 can and Fig. 3-Figure 11 shown in the various textural associations of second direction coil, these are all included in protection scope of the present invention.
Optionally, referring to Fig. 2, touch display panel also comprises: first control circuit 31 and second control circuit 32.First control circuit 31 is electrically connected to one end of first direction coil, second control circuit 32 is electrically connected to one end of second direction coil, be used for respectively controlling first direction coil and second direction coil in image display status or touch detected state, thereby making touch-control display panel realize the function showing with electromagnetism touch-control.
Optionally, touch display panel also comprises: the first ground unit 33 that is electrically connected on the first direction coil other end is not shown in Fig. 2 with the second ground unit 34(that is electrically connected on the second direction coil other end).The first ground unit 33 matches with first control circuit 31 and realizes the control to first direction coil, the second ground unit 34 matches with second control circuit 32 and realizes the control to second direction coil, say further, when image shows, the first public electrode wire 24 is applied in the first public voltage signal, and the second public electrode 25 is applied in the second public voltage signal; Touch while detecting, first direction coil produces induction current; Second direction coil produces induction current.
Although first direction coil and second direction coil have multiple implementation, but the structure that the first direction coil of every kind of implementation is electrically connected to the first ground unit 33 with first control circuit 31 is similar with principle and the second direction coil of every kind of implementation is similar with the structure that second control circuit 32 is electrically connected to the second ground unit 34 with principle, therefore, at this, take adjacent two the first public electrode wires 24 is electrically connected to the first direction coil that forms and two adjacent the second public electrodes 25 to be electrically connected to the second direction coil forming is example, respectively structure and the principle of work of first control circuit 31 and the first ground unit 33 and second control circuit 32 and the second ground unit 34 are described in detail.
Figure 12 is according to the fundamental diagram of the first direction coil of the touch display panel of the present embodiment and second direction coil.Referring to Figure 12, in a concrete example, first control circuit 31 comprises a plurality of TFT switches 311, controls the first control line 312, first signal line 313 and a plurality of first detecting unit 314 of a TFT on off state, wherein, the grid of the one TFT switch 311 is electrically connected on the first control line 312, the source electrode of the one TFT switch 311 or drain electrode are electrically connected on the drain electrode of first signal line 313, the one TFT switches 311 or one end and the first detecting unit 314 that source electrode is electrically connected on first direction coil.
Second control circuit 32 comprises a plurality of the 2nd TFT switches 321, controls the second control line 322, secondary signal line 323 and a plurality of second detecting unit 324 of the 2nd TFT on off state, wherein, the grid of the 2nd TFT switch 321 is electrically connected on the second control line 322, the source electrode of the 2nd TFT switch 321 or drain electrode are electrically connected on the drain electrode of secondary signal line 323, the two TFT switches 321 or one end and the second detecting unit 324 that source electrode is electrically connected on second direction coil.
When image shows, the first control line 312 and the second control line 322 are controlled respectively all TFT switches 311 and all the 2nd TFT switch 321 conductings, the first public electrode wire 24 is applied in the first public voltage signal from first signal line 313, and the second public electrode 25 is applied in the second public voltage signal from secondary signal line 323.Wherein, the first public voltage signal is identical with the second public voltage signal.
Touch while detecting, the first control line 312 is controlled all TFT switches 311 and is disconnected, each first direction coil is independent of one another, and the first direction coil that is subject to electromagnetic induction produces induction current, and by the first detecting unit 314, is detected to determine the second direction coordinate of output touch location; The second control line 322 is controlled all the 2nd TFT switches 321 and is disconnected, each second direction coil is independent of one another, the second direction coil that is subject to electromagnetic induction produces induction current, and by the second detecting unit 324, is detected to determine the first direction coordinate of output touch location.
Further, referring to Figure 12, in a concrete example, the first ground unit 33 comprises a plurality of the 3rd TFT switches 331 and controls the 3rd control line 332 of the 3rd TFT on off state, the grid of the 3rd TFT switch 331 is electrically connected on the 3rd control line 332, the source electrode of the 3rd TFT switch 331 or drain electrode are electrically connected on the other end of first direction coil, the drain electrode of the 3rd TFT switch 331 or source ground.
The second ground unit 34 comprises the 4th control line 342 of a plurality of the 4th TFT switches 341 and the 4th TFT switch 341 states of control, the grid of the 4th TFT switch 341 is electrically connected on the 4th control line 342, the source electrode of the 4th TFT switch 341 or drain electrode are electrically connected on the other end of second direction coil, the drain electrode of the 4th TFT switch 341 or source ground.
When image shows, the 3rd control line 332 and the 4th control line 342 control respectively all the 3rd TFT switches 331 and all the 4th TFT341 switches disconnect, the first public electrode wire 24 is applied in the first public voltage signal, and the second public electrode 25 is applied in the second public voltage signal.In the present embodiment, the first public voltage signal is identical with the second public voltage signal.
Touch while detecting, the 3rd control line 332 is controlled all the 3rd TFT switch 331 conductings, so that be subject to the first direction coil of electromagnetic induction, produces induction current; The 4th control line 342 is controlled all the 4th TFT switch 341 conductings, so that be subject to the second direction coil of electromagnetic induction, produces induction current.
It should be noted that, in a concrete example, the TFT switch 311 in first control circuit 31 and the 3rd TFT switch 331 in the first ground unit 33 and the 2nd TFT switch 321 in second control circuit 32 and the 4th TFT switch in the second ground unit 34 are formed on tft array substrate 22.Because existing non-display area, the frame place at tft array substrate 22 can be used for arranging the circuit of control circuit or other purposes, the one TFT switch 311, the 2nd TFT switch 321 the 3rd TFT switch 331 can be made with the 4th TFT switch together with the TFT switch of the control pixel cell on tft array substrate 22, can reduce like this flow process of manufacture craft.In another specific example, if the switch in first control circuit 31, second control circuit 32, the first ground unit 33 and the 4th ground unit 34 does not adopt TFT switch, and adopt the switch (not shown) of other kind, first control circuit 31, second control circuit 32, the first ground unit 33 and the 4th ground unit 34 can be made in tft array substrate 22(and be usually located at the step place that tft array substrate extends color membrane substrates so) upper, also can be made in the client (not shown) of end product.
Therefore, by the control of first control circuit 31 and 33 pairs of first direction coils of the first ground unit, and the control of second control circuit 32 and 34 pairs of second direction coils of the second ground unit, can realize and show and touch detection time-sharing work, thereby make demonstration and touch control integratedization of electromagnetism of touch display panel.In addition, because first direction coil is formed by the first public electrode wire 24 being positioned on tft array substrate 22, second direction coil is formed by the second public electrode 25 being positioned on color membrane substrates 21, with existing, display panels is fitted together and compared with the module employing external hanging type with electromagnetism input function, realize the lightening of touch display panel, and reduced production cost.
In addition, in above-mentioned the second projection of public electrode 25 on tft array substrate 22, contain in the concrete example of a row or column pixel at least, if it is more that the second public electrode 25 covers line number or the columns of pixel, the number of the second public electrode 25 forming on color membrane substrates 21 like this can reduce significantly, and the quantity that is electrically connected to the second direction coil forming by the second public electrode 25 is reduced, thereby cause controlling the 2nd TFT switch 321 in second control circuit 32 and the number of the 4th TFT switch 341 in the second ground unit 34 obviously reduces.Under identical resolution, with each sub-pixel of prior art, a TFT switch of controlling solenoid is set and compares, the TFT switch of the control solenoid in the present embodiment at least reduces 2/3.Because the present embodiment can reduce the TFT switch of controlling solenoid, therefore, make for the non-display area width at the frame place of gauge tap is set, to reduce on tft array substrate 22, thereby make the viewing area area of touch display panel become large, meet the narrow frame trend of current trend.
Further, detecting first direction coil or second direction coil produces faradic size and can realize in the following manner:
For a touch display panel collocation time writer (or electromagnetism pointer).If time writer is active time writer, a first direction coil and second direction coil inductive electromagnetic signal, and produce induction current; If time writer is passive electrical magnetic pen, first direction coil and second direction coil first provide driving electromagnetic signal by the first detecting unit and the second detecting unit respectively, then first direction coil and second direction coil inductive electromagnetic signal again, and produce induction current.The passive electrical magnetic pen of take below describes as example.
Passive electrical magnetic pen is built-in with resonance circuit.Touch display panel is injected passive electrical magnetic pen by transmitting frequency electromagnetic waves by energy, by passive electrical magnetic pen, electromagnetic signal is back to touch display panel again, now touch display panel stops emitting electromagnetic wave, and switch to reception mode of electromagnetic wave, when neighbouring while having time writer, to there is electromagnetic induction in first direction coil and second direction coil in touch display panel, the induction current that first direction coil produces is detected and passes through the coordinate of processing the second direction that obtains passive electrical magnetic pen position by the first detecting unit, the induction current that second direction coil produces is detected and passes through the coordinate of processing the first direction that obtains passive electrical magnetic pen position by the second detecting unit.Obtain, after the first direction coordinate and second direction coordinate of passive electrical magnetic pen position, just can determining the position of passive electrical magnetic pen.
The embodiment of the present invention also provides a kind of touch display unit, and this touch display unit comprises touch display panel.Wherein, touch display panel adopts above-mentioned touch display panel.
It should be noted that, the touch display unit the present invention relates to is at least a kind of in LCD, OLED, Electronic Paper.
Touch display panel and touch display unit that the embodiment of the present invention proposes, by being positioned at least two the first public electrode wires on tft array substrate, be electrically connected to formation first direction coil, at least two the second public electrodes that are positioned on color membrane substrates are electrically connected to formation second direction coil, when when image shows, all the first public electrode wires and all the second public electrodes are all applied in same common electric voltage, when touching detection, all the first public electrode wires form the independently coil-induced electromagnetic signal of a plurality of first directions, and export induction current to determine the second direction coordinate of touch location, all the second public electrodes form the independently coil-induced electromagnetic signal of a plurality of second directions, and export induction current to determine the first direction coordinate of touch location.Make like this touch display panel normally show, and touching while detecting without increasing extra electromagnetism touch control component, just can realize respectively Presentation Function and electromagnetism touch controllable function, thereby make touch display panel realize demonstration and touch control integratedization of electromagnetism, and then make touch display panel more lightening, also reduce production cost, simplified the technological process of production, improved product yield.
Note, above are only preferred embodiment of the present invention and institute's application technology principle.Skilled person in the art will appreciate that the specific embodiment the invention is not restricted to here, can carry out for a person skilled in the art various obvious variations, readjust and substitute and can not depart from protection scope of the present invention.Therefore, although the present invention is described in further detail by above embodiment, the present invention is not limited only to above embodiment, in the situation that not departing from the present invention's design, can also comprise more other equivalent embodiment, and scope of the present invention is determined by appended claim scope.
Claims (12)
1. a touch display panel, comprises the color membrane substrates and the tft array substrate that are oppositely arranged, and is arranged at the liquid crystal layer between described color membrane substrates and tft array substrate, and described touch display panel also comprises:
Described tft array substrate comprises many first public electrode wires, and at least two described the first public electrode wires are electrically connected to and form first direction coil;
Described color membrane substrates comprises many second public electrodes, and at least two described the second public electrodes are electrically connected to and form second direction coil;
When image shows, all described the first public electrode wires and all described the second public electrodes are all applied in same common electric voltage;
Touch while detecting, all described the first public electrode wires form the independently coil-induced electromagnetic signal of a plurality of first directions, and export induction current to determine the second direction coordinate of touch location, all described the second public electrodes form the independently coil-induced electromagnetic signal of a plurality of second directions, and export induction current to determine the first direction coordinate of touch location.
2. touch display panel according to claim 1, is characterized in that, described tft array substrate also comprises sweep trace, and described the first public electrode wire and described sweep trace are positioned at same layer.
3. touch display panel according to claim 1, is characterized in that, at least two described the first public electrode wires are electrically connected to and form first direction coil, comprising:
Any two the first public electrode wires are one group, and one end of described any two first public electrode wires of each group is electrically connected to form described first direction coil by wire; Or,
Any three the first public electrode wires are one group, and wherein, described any three first public electrode wires of each group are followed successively by the first sub-electrode, the second sub-electrode and the 3rd sub-electrode; Described the first sub-electrode is electrically connected to by wire at first end with described the 3rd sub-electrode, described the second sub-electrode is electrically connected to by wire at the second end with described the 3rd sub-electrode, to form described first direction coil, wherein, described first end and described the second end lay respectively at the different two ends of three sub-electrodes; Or,
Any three the first public electrode wires are one group, and wherein, described any three first public electrode wires of each group are followed successively by the first sub-electrode, the second sub-electrode and the 3rd sub-electrode; Described the first sub-electrode is electrically connected to by wire at first end with described the second sub-electrode, and described the second sub-electrode is electrically connected to by wire at described first end with described the 3rd sub-electrode, to form described first direction coil.
4. touch display panel according to claim 1, is characterized in that, at least two described the second public electrodes are electrically connected to and form second direction coil, comprising:
Any two the second public electrodes are one group, and one end of described any two second public electrodes of each group is electrically connected to form described second direction coil by wire; Or,
Any three the second public electrodes are one group, and wherein, described any three second public electrodes of each group are followed successively by the 4th sub-electrode, the 5th sub-electrode and the 6th sub-electrode; Described the 4th sub-electrode is electrically connected to by wire at first end with described the 6th sub-electrode, described the 5th sub-electrode is electrically connected to by wire at the second end with described the 6th sub-electrode, to form described second direction coil, wherein, described first end and described the second end lay respectively at the different two ends of three sub-electrodes; Or,
Any three the second public electrodes are one group, and wherein, described any three second public electrodes of each group are followed successively by the 4th sub-electrode, the 5th sub-electrode and the 6th sub-electrode; Described the 4th sub-electrode is electrically connected to by wire at first end with described the 5th sub-electrode, and described the 5th sub-electrode is electrically connected to by wire at described first end with described the 6th sub-electrode, to form described second direction coil.
5. according to the touch display panel described in any one in claim 1-4, it is characterized in that, described touch display panel also comprises: first control circuit and second control circuit, wherein,
Described first control circuit comprises a plurality of TFT switches, the first control line of controlling a described TFT on off state, first signal line and a plurality of the first detecting unit, wherein, the grid of a described TFT switch is electrically connected on described the first control line, the source electrode of a described TFT switch or drain electrode are electrically connected on described first signal line, and the drain electrode of a described TFT switch or source electrode are electrically connected on one end and described first detecting unit of described first direction coil;
Described second control circuit comprises a plurality of the 2nd TFT switches, the second control line of controlling described the 2nd TFT on off state, secondary signal line and a plurality of the second detecting unit, wherein, the grid of described the 2nd TFT switch is electrically connected on described the second control line, the source electrode of described the 2nd TFT switch or drain electrode are electrically connected on described secondary signal line, and the drain electrode of described the 2nd TFT switch or source electrode are electrically connected on one end and described second detecting unit of described second direction coil;
When image shows, described the first control line and described the second control line are controlled respectively all described TFT switches and all described the 2nd TFT switch conductions, described the first public electrode wire is applied in the first public voltage signal from described first signal line, and described the second public electrode is applied in the second public voltage signal from described secondary signal line;
Touch while detecting, comprising:
Described the first control line is controlled all described TFT switches and is disconnected, each first direction coil is independent of one another, the first direction coil that is subject to electromagnetic induction produces induction current, and by described the first detecting unit, is detected to determine the second direction coordinate of output touch location;
Described the second control line is controlled all described the 2nd TFT switches and is disconnected, each second direction coil is independent of one another, the second direction coil that is subject to electromagnetic induction produces induction current, and by described the second detecting unit, is detected to determine the first direction coordinate of output touch location.
6. touch display panel according to claim 5, it is characterized in that, described touch display panel also comprises: be electrically connected on first ground unit and the second ground unit that is electrically connected on the described second direction coil other end of the described first direction coil other end, wherein
When image shows, described the first public electrode wire is applied in described the first public voltage signal, and described the second public electrode is applied in described the second public voltage signal;
Touch while detecting, described first direction coil produces induction current; Described second direction coil produces induction current.
7. touch display panel according to claim 6, it is characterized in that, described the first ground unit comprises a plurality of the 3rd TFT switches and controls the 3rd control line of described the 3rd TFT on off state, the grid of described the 3rd TFT switch is electrically connected on described the 3rd control line, the source electrode of described the 3rd TFT switch or drain electrode are electrically connected on the other end of described first direction coil, the drain electrode of described the 3rd TFT switch or source ground;
Described the second ground unit comprises a plurality of the 4th TFT switches and controls the 4th control line of described the 4th TFT on off state, the grid of described the 4th TFT switch is electrically connected on described the 4th control line, the source electrode of described the 4th TFT switch or drain electrode are electrically connected on the other end of described second direction coil, the drain electrode of described the 4th TFT switch or source ground;
When image shows, described the 3rd control line and described the 4th control line control respectively all described the 3rd TFT switches and all described the 4th TFT switches disconnect, described the first public electrode wire is applied in described the first public voltage signal, and described the second public electrode is applied in described the second public voltage signal;
Touch while detecting, described the 3rd control line is controlled all described the 3rd TFT switch conductions, so that be subject to the first direction coil of electromagnetic induction, produces induction current; Described the 4th control line is controlled all described the 4th TFT switch conductions, so that be subject to the second direction coil of electromagnetic induction, produces induction current.
8. touch display panel according to claim 7, is characterized in that, described the first public voltage signal is identical with described the second public voltage signal.
9. touch display panel according to claim 1, is characterized in that, the shape of described the first public electrode wire and described the second public electrode is bar shaped.
10. touch display panel according to claim 9, is characterized in that, at least a row or column pixel is contained in the projection of described the second public electrode on tft array substrate.
11. touch display panels according to claim 1, is characterized in that, the material of described the first public electrode wire is metal or transparent conductive material, and the material of described the second public electrode is transparent conductive material.
12. 1 kinds of touch display units, is characterized in that, comprise the touch display panel as described in any one in claim 1-11.
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