CN202976027U - Touch display device and display part - Google Patents
Touch display device and display part Download PDFInfo
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- CN202976027U CN202976027U CN 201220696175 CN201220696175U CN202976027U CN 202976027 U CN202976027 U CN 202976027U CN 201220696175 CN201220696175 CN 201220696175 CN 201220696175 U CN201220696175 U CN 201220696175U CN 202976027 U CN202976027 U CN 202976027U
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Abstract
The utility model provides a touch display device and a display part and belongs to the field of touch screen displays. The touch display device comprises a double-gate array substrate, a touch signal position judging circuit, and a plurality of optical sensing units which are arranged on the double-gate array substrate. The plurality of optical sensing units are used for generating output signals according to variation amount of illumination received and transmitting the output signals to the touch signal position judging circuit through an optical sensing signal line, and the touch signal position judging circuit is used for judging a touch position according to the received output signals, the optical sensing signal line is located between two rows of adjacent sub-pixels, and no data line is arranged between the two rows of adjacent sub-pixels. The touch display device and the display part have the advantages that touch precision and accuracy of optical touch sensing can be improved, and aperture opening ratio of a display panel is not affected.
Description
Technical field
The utility model relates to the touch-screen display field, refers to especially a kind of touch display unit and display device.
Background technology
Divide according to principle, touch-screen comprises following several substantially: resistive touch screen, capacitive touch screen, infrared-type touch-screen, surface acoustic wave touch screen, electromagnetical type touch screen, ripple induction type touch-screen, frustrated total internal reflection optical induction type etc. shake.According to forming structure, touch-screen is divided into: external hanging type touch-screen (bilayer), touch sensing at coverage rate (individual layer), touch sensing on panel, touch sensing is inner at panel.Along with the market trend of whole module attenuate, the structure of touch-screen is accomplished the panel in-house development by the touch sensing external hanging type to touch sensing, so both can realize that the reduced thickness of touch panel reduces the cost of touch-screen simultaneously.Touch sensing will be divided into three kinds of technology at the panel internal main at present: resistance-type, condenser type, optical profile type.Wherein the optical profile type touch sensing with its unrestricted on panel size is used, advantage such as the life-span is relatively stable that has, has become follow-on main touch sensing technology.
Need to draw special optical sensor signal line in prior art when the optical touch sensing technology being accomplished panel is inner, therefore need to increase a lot of optical sensor signal lines in traditional data line side in panel, for fear of adjacent optical sensor signal line and the mutual interference between data line, need the spacing between assurance optical sensor signal line and data line, will affect like this aperture opening ratio of whole display panel.
The utility model content
The technical problems to be solved in the utility model is to provide a kind of touch display unit and display device, can improve touch precision and the accuracy of optical touch sensing, and does not affect the aperture opening ratio of display panel.
For solving the problems of the technologies described above, embodiment of the present utility model provides technical scheme as follows:
On the one hand, a kind of touch display unit is provided, comprise double grid array base palte and touch signal position judgment circuit, be provided with a plurality of sub-pixel of matrix, many controlling grid scan lines and many data lines of being arranged on described double grid array base palte, be provided with two controlling grid scan lines between adjacent two row sub-pixels, be provided with a data line every two row sub-pixels, wherein, described touch display unit also comprises:
A plurality of optical sensing unit that are arranged on described double grid array base palte, this optical sensing unit is used for giving birth to output signal according to the illumination variation volume production that receives, and described output signal is passed to described touch location decision circuitry by the optical sensor signal line, judge touch location by described touch location decision circuitry according to the described output signal that receives;
Wherein, described optical sensor signal line does not arrange data line between this two row adjacent subpixels between two row adjacent subpixels.
Further, described optical sensing unit comprises:
Optical sensor be used for to receive the surround lighting that gets from the opening that is placed on optical sensor or adds light source, and producing output signal;
Control element is used for controlling the output of described output signal, exports described output signal to described optical sensor signal line.
Further, described optical sensor and described control element are thin film transistor (TFT);
The grid of described optical sensor is connected with public electrode wire with drain electrode, and the source electrode of described optical sensor is connected with the drain electrode of control element;
The grid of described control element is connected with described controlling grid scan line, and the drain electrode of described control element is connected with the source electrode of described optical sensor, and the source electrode of described control element is connected with described optical sensor signal line.
Further, described optical sensing unit is positioned at the pixel region that is defined by described controlling grid scan line and described data line, and described public electrode wire extends in described pixel region;
Perhaps, described public electrode wire is arranged between two controlling grid scan lines in the middle of adjacent two row sub-pixels; The optical sensor of described optical sensing unit is arranged on above this public electrode wire.
Further, described optical sensing unit becomes matrix to arrange, and is arranged between sets of adjacent pixels, and described pixel groups is comprised of a plurality of sub-pixels that become matrix to arrange.
Further, described pixel groups comprises delegation's sub-pixel at least; And/or described pixel groups comprises at least three row sub-pixels.
The utility model embodiment also provides a kind of display device, comprises above-mentioned touch display unit.
Embodiment of the present utility model has following beneficial effect:
In such scheme, the optical sensor signal line is between two row adjacent subpixels, between this two row adjacent subpixels, data line is not set, optical sensor signal linear distance data line is far away like this, just do not need to do again extra design with the spacing between assurance optical sensor signal line and data line, thereby can not affect the aperture opening ratio of whole display panel; And the distance between optical sensor signal line and data line is distant, can reduce data line signal to the interference of optical sensing unit, touches precision and accuracy thereby improve.
Description of drawings
Fig. 1 is the wiring schematic diagram of the touch display unit of the utility model embodiment;
Fig. 2 is the structural representation of the optical sensing unit of the utility model embodiment;
Fig. 3 is the schematic diagram after composition technique for the first time in the method for making of touch display unit of the utility model embodiment one;
Fig. 4 is the schematic diagram after composition technique for the second time in the method for making of touch display unit of the utility model embodiment one;
Fig. 5 A is the schematic diagram after composition technique for the third time in the method for making of touch display unit of the utility model embodiment one;
Fig. 5 B is the enlarged diagram of the interior part of dotted line of Fig. 5 A;
Fig. 6 is the grid of the a-Si TFT of the utility model embodiment light leakage current under different light intensity when being connected with source electrode;
Fig. 7 is the circuit diagram of the touch display unit of the utility model embodiment;
Fig. 8 is the structural representation of existing a kind of ADS type array base palte;
Fig. 9 is the structural representation of the optical sensing unit of the utility model embodiment two.
Embodiment
For technical matters, technical scheme and advantage that embodiment of the present utility model will be solved is clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
Embodiment of the present utility model in prior art for fear of adjacent optical sensor signal line and the mutual interference between data line, need the spacing between assurance optical sensor signal line and data line, will affect the problem of the aperture opening ratio of whole display panel like this, a kind of touch display unit and display device are provided, can improve touch precision and the accuracy of optical touch sensing, and not affect the aperture opening ratio of display panel.
Traditional sub-pixel structure is controlled the pixel charging together by a controlling grid scan line, a source signal line (being data line) and a TFT switch (pixel gauge tap).When the capable controlling grid scan line of N is high level, the TFT switch opens, source signal line (data line) signal is input to the signal of needs output above pixel electrode by TFT switch (pixel gauge tap), thereby reaches display effect.Complete the charging process of the capable pixel of whole N this moment.The voltage of other moment N controlling grid scan lines is low level, and the TFT switch is in closed condition.On pixel electrode electric charge by and public electrode form memory capacitance, keep certain electric charge until during next frame controlling grid scan line be that high level charges again.In traditional sub-pixel structure, the data line vertical setting of types is in column and be parallel to each other, each row sub-pixel is equipped with a data line, when realizing that optical touch shows, just can not avoid the optical sensor signal line is arranged on the data line side, for fear of adjacent optical sensor signal line and the mutual interference between data line, need the spacing between assurance optical sensor signal line and data line, will affect like this aperture opening ratio of whole display panel.
Touch display unit of the present utility model is based on Dual Gate(double grid) the array base palte realization.Be provided with a plurality of sub-pixel of matrix, many controlling grid scan lines, many data lines of being arranged on the DualGate array base palte, the controlling grid scan line horizontally-arranged is embarked on journey and is parallel to each other, every row's sub-pixel is provided with two controlling grid scan lines, the data line vertical setting of types is in column and be parallel to each other, and every two row sub-pixels are provided with a data line.In Dual Gate array base palte, two sub-pixels of colleague's different lines share a source signal line (data line), and this is for whole array base palte, and the quantity of data line will reduce half.But because two adjacent sub-pixels of colleague are made of different signal wires, so controlling grid scan line doubles, the capable sub-pixel of N has up and down two controlling grid scan lines (2N and 2N+1) and forms.Two sub-pixels consist of one-period, and when 2N bar controlling grid scan line was high level, TFT switch (1) was opened, and the signal of data line passes to data line leftmost pixel electrode by TFT switch (1), and this moment, leftmost pixel began charging.When the capable controlling grid scan line of 2N became low level by high level, when the capable controlling grid scan line of 2N+1 became high level by low level, TFT switch (1) cut out, and TFT switch (2) is opened.The signal of data line passes to data line right pixels electrode by TFT switch (2), and right pixels begins charging, just completes the charging of the capable pixel of N this moment.
The touch display unit of the utility model embodiment, comprise double grid array base palte and touch signal position judgment circuit, be provided with a plurality of sub-pixel of matrix, many controlling grid scan lines and many data lines of being arranged on described double grid array base palte, be provided with two controlling grid scan lines between adjacent two row sub-pixels, be provided with a data line every two row sub-pixels, wherein, described touch display unit also comprises:
A plurality of optical sensing unit that are arranged on described double grid array base palte, this optical sensing unit is used for giving birth to output signal according to the illumination variation volume production that receives, and described output signal is passed to described touch location decision circuitry by the optical sensor signal line, judge touch location by described touch location decision circuitry according to the described output signal that receives;
Wherein, described optical sensor signal line does not arrange data line between this two row adjacent subpixels between two row adjacent subpixels.
Wherein, the optical sensing unit comprises: optical sensor is used for receiving the surround lighting that gets from the opening that is placed on optical sensor or other add light source, and produces output signal; Control element is used for controlling the output of output signal, exports output signal to above-mentioned optical sensor signal line; The optical sensor signal line is vertical with controlling grid scan line, and output signal is delivered to touch signal position judgment circuit, so that touch signal position judgment circuit is processed the position of determining the touch point to this output signal.
The manufacturing process of the touch display unit of the utility model embodiment comprises: controlling grid scan line, data line, sub-pixel on described double grid array base palte, and the manufacturing process of optical sensing unit and optical sensor signal line; Wherein, described optical sensor signal line and described data line are made by a composition technique.
The optical sensor signal line of touch display unit of the present utility model is between two row adjacent subpixels, between this two row adjacent subpixels, data line is not set, optical sensor signal linear distance data line is far away like this, just do not need to do again extra design with the spacing between assurance optical sensor signal line and data line, thereby can not affect the aperture opening ratio of whole display panel; And the distance between optical sensor signal line and data line is distant, can reduce data line signal to the interference of optical sensing unit, touches precision and accuracy thereby improve.
Further introduce below by two instantiations the touch display unit that provides in the utility model embodiment.
Embodiment one
In the present embodiment, take a kind of based on the TN(twisted-nematic) touch display unit of type structure is as example.
As shown in Figure 1, the touch display unit of the utility model embodiment comprises above-mentioned double grid array base palte, also comprises:
Be arranged on double grid array base palte 10 and be arranged on a plurality of optical sensings unit 11 between two adjacent subpixels; Optical sensing unit 11 is used for giving birth to output signal according to the illumination variation volume production that receives, and described output signal is passed to described touch location decision circuitry by the optical sensor signal line, judge touch location by described touch location decision circuitry according to the described output signal that receives;
Wherein, described optical sensor signal line does not arrange data line between this two row adjacent subpixels between two row adjacent subpixels.
Wherein, as shown in Figure 2, optical sensing unit 11 comprises: optical sensor 111 is used for receiving the surround lighting that gets from the opening that is placed on optical sensor 111 or other add light source, and produces output signal; Control element 112 is used for controlling the output of output signal, exports output signal to above-mentioned optical sensor signal line 113; Optical sensor signal line 113 is delivered to the touch location decision circuitry with output signal, so that the touch location decision circuitry is processed the position of determining the touch point to this output signal.
In the present embodiment, optical sensing unit 11 is positioned at the pixel region that is defined by controlling grid scan line and data line, and public electrode wire extends in described pixel region.
Opening on above-mentioned optical sensor 111 can be corresponding to the zone of the optical sensitive in optical sensor 111.In the touch display unit of reality, the top of control element 112 and optical sensor signal line 113 is provided with shading device, such as black matrix B M; Optical sensor 111 tops need not to arrange shading device, with the variation that guarantees that optical sensor 111 can be sensed extraneous light intensity in real time.
Particularly, optical sensor 111 and control element 112 all can adopt thin film transistor (TFT) to realize.Optical sensor 111 can be formed by a larger thin film transistor (TFT) (Photo TFT) of size, and the active layer in this thin film transistor (TFT) can adopt to the more sensitive semiconductor material of beam intensity ratio, such as amorphous silicon a-Si.The light leakage current when grid that is illustrated in figure 6 as a-Si TFT is connected with source electrode under different light intensity can be found out, along with the variation of light intensity, the light leakage current of a-Si TFT also changes thereupon.Opening on above-mentioned optical sensor 111 can be the channel region that corresponds to above-mentioned Photo TFT; When ambient light shone active layer by the TFT channel region, the charge carrier in the active layer of above-mentioned Photo TFT was subject to exciting the generation light leakage current.
The most basic principle of optical touch sensing is when finger touch shines a certain zone of display panel to display panel or with laser pen, and the different light intensity of optical sensing unit induction of display panel shows different qualities, thereby exports different signals.
Particularly, under normal surround lighting, can produce stable light leakage current in the optical sensor 111 in above-mentioned touch display unit, optical sensor 111 is also stable to the output signal that control element 112 transmits.When finger touch arrived display panel, the light that the optical sensor 111 in touch point institute overlay area receives died down, and the light leakage current that produces in optical sensor 111 diminishes, and correspondingly the output signal of optical sensor 111 also dies down; When laser pen etc. added the light source irradiation display panel, the light grow that the optical sensor 111 in irradiation area receives, the light leakage current that produces in optical sensor 111 became large, correspondingly also grow of the output signal of optical sensor 111.
When control element 112 was opened, above-mentioned output signal was delivered to the touch location decision circuitry by optical sensor signal line 113; The touch location decision circuitry receives the signal of optical sensing unit output, trigger the position feedback of the touch point signal processing enter to touch display unit afterwards the position that Strength Changes situation by to the received signal and time process to judge the touch point.
As shown in Figure 7, when finger or laser pen when touching the double grid array base palte, be placed in the surround lighting of the opening part on the optical sensing unit or add the light intensity that light source produces and change, cause optical sensor 111(Photo TFT) light leakage current change, thereby because the variation of light leakage current causes the change in voltage of Cst2.When controlling grid scan line passed into the grid start signal in the overlay area, touch point, control element 112 was also opened thereupon, and the signal of variation is by control element 112(Readout TFT) feed back to optical sensor signal line 113; Optical sensor signal line 113 is delivered to the touch location decision circuitry with output signal and processes, by the position of touch location decision circuitry by the intensity of this output signal and time are processed to judge the touch point.
In the utility model, optical sensing unit 11 can be on double grid array base palte 10 arrangement in a row, also can arrangement in column on double grid array base palte 10.Particularly, described optical sensing unit becomes matrix to arrange, and is arranged between sets of adjacent pixels, and each pixel groups is comprised of a plurality of sub-pixels that become matrix to arrange; Each pixel groups comprises delegation's sub-pixel at least, and/or, comprise at least three row sub-pixels.For example, be provided with delegation's optical sensing unit between can every two row sub-pixels, be provided with a row optical sensing unit between every three row sub-pixels.Further, the optical sensing unit can all be set between every two row sub-pixels, can every two row or more multirow delegation's optical sensing unit is set, can also every four row or more multiple row one row optical sensing unit is set, specifically can according to actual conditions (such as to power consumption or touch the requirement of precision) suitably change arrangement mode and the quantity of optical sensing unit 11.
The optical sensing unit of touch display unit of the present utility model is arranged between two adjacent subpixels of double grid array base palte, wherein, between these two adjacent sub-pixels, data line is not set, optical sensing cell distance data line is far away like this, just do not need to do again extra design with the spacing between assurance optical sensor signal line and data line, thereby can not affect the aperture opening ratio of whole display panel; And the distance between optical sensing unit and data line is distant, can reduce data line signal to the interference of optical sensing unit, touches precision and accuracy thereby improve.
The method for making of the touch display unit of the utility model embodiment comprises the following steps:
Step 1, form the grid of pixel TFT, the grid of optical sensor and grid, public electrode wire and the controlling grid scan line of control element by composition technique for the first time on substrate, be illustrated in figure 3 as the schematic diagram of array base palte after composition technique for the first time;
In above-mentioned steps 1, control element 112(Readout TFT) grid is connected with controlling grid scan line, perhaps also can directly be served as by controlling grid scan line.And the grid of above-mentioned optical sensor 111 is connected with the public electrode wire of sub-pixel or is direct with the grid of public electrode wire as optical sensor 111.
Utilize same mask(mask plate) make the scheme that metal layer pattern is leaked in active layer and source, belonged to for a person skilled in the art routine techniques, repeat no more herein.
After completing steps 2, the source electrode of optical sensor 111 is connected with the drain electrode of control element 112, and perhaps the drain electrode of the source electrode of optical sensor 111 and control element 112 is into a single integrated structure; Simultaneously, the source electrode of control element 112 is connected with optical sensor signal line 113.
Step 4, forms pixel electrode and connecting electrode by the ITO making by the 4th composition technique on insulation course, be illustrated in figure 1 as the schematic diagram of array base palte after the 4th composition technique; Pixel electrode is connected with the drain electrode of pixel TFT by pixel electrode via hole 3, the connecting electrode that is formed by the ITO material is electrically connected to the drain and gate generation of optical sensor 111 respectively by the via hole 2 above the drain and gate of optical sensor 111, and then the grid of optical sensor 111 is connected with drain electrode.Described connecting electrode arranges but does not produce any electrical connection with layer with pixel electrode.
Touch display unit in the utility model embodiment, its optical sensor signal line is between two row adjacent subpixels, between this two row adjacent subpixels, data line is not set, optical sensor signal linear distance data line is far away like this, just do not need to do again extra design with the spacing between assurance optical sensor signal line and data line, thereby can not affect the aperture opening ratio of whole display panel; And the distance between optical sensor signal line and data line is distant, can reduce data line signal to the interference of optical sensing unit, touches precision and accuracy thereby improve.
Embodiment two
In the present embodiment, will be take a kind of based on the senior super dimension of an ADS(switch technology) touch display unit of structure is as example.
An above-mentioned senior super dimension switch technology (AD-SDS, ADvanced Super Dimension Switch, be called for short ADS) electric field formation multi-dimensional electric field that to be mainly the electric field that produces by gap electrode edge in same plane and gap electrode layer produce with the plate electrode interlayer, make in liquid crystal cell between gap electrode, directly over electrode, all aligned liquid-crystal molecules can both produce rotation, thereby improved the liquid crystal work efficiency and increased light transmission efficiency.A senior super dimension switch technology can improve the picture quality of TFT-LCD product, has high resolving power, high permeability, low-power consumption, wide visual angle, high aperture, low aberration, without advantages such as water of compaction ripples (pushMura).
Be illustrated in figure 8 as a structural representation of the array base palte of ADS type liquid crystal display, this array base palte comprises: substrate 101, controlling grid scan line 115, the public electrode wire 114 that forms simultaneously with grid line, public electrode 122, data line 105, thin film transistor (TFT) 106 is with contacted pixel electrode 107 of thin film transistor (TFT) 106 etc.Wherein, the slit 108 that has certain inclination angle on pixel electrode 107, pixel electrode 107(with slit 108 is equivalent to gap electrode) be equivalent to plate electrode with relative public electrode 122() overlapping generation multi-dimensional electric field, this multi-dimensional electric field drives the liquid crystal molecule that is positioned on pixel electrode and is positioned between pixel electrode and rotates, and realizes the adjusting to GTG.
Larger over against area due to pixel electrode and public electrode can be formed directly in memory capacitance (Cst); Therefore, the public electrode wire on ADS type array base palte can be arranged in the pixel region that is defined by controlling grid scan line and data line.
Similar with embodiment one, the touch display unit in the present embodiment is based on the Dual Gate(double grid of ADS type) the array base palte realization.
Touch display unit in the utility model embodiment, comprise double grid array base palte and touch signal position judgment circuit, be provided with a plurality of sub-pixel of matrix, many controlling grid scan lines and many data lines of being arranged on described double grid array base palte, be provided with two controlling grid scan lines between adjacent two row sub-pixels, be provided with a data line every two row sub-pixels;
Described touch display unit also comprises:
A plurality of optical sensing unit that are arranged on described double grid array base palte, this optical sensing unit is used for giving birth to output signal according to the illumination variation volume production that receives, and described output signal is passed to described touch location decision circuitry by the optical sensor signal line, judge touch location by described touch location decision circuitry according to the described output signal that receives;
Wherein, described optical sensor signal line does not arrange data line between this two row adjacent subpixels between two row adjacent subpixels.
Further, above-mentioned optical sensing unit comprises:
Optical sensor be used for to receive the surround lighting that gets from the opening that is placed on optical sensor or adds light source, and producing output signal;
Control element is used for controlling the output of described output signal, and described output signal is outputed to above-mentioned optical sensor signal line.
Wherein, described optical sensor and described control element are thin film transistor (TFT) TFT; The grid of described optical sensor is connected with public electrode wire with drain electrode, and the source electrode of described optical sensor is connected with the drain electrode of control element; The grid of described control element is connected with described controlling grid scan line, and the drain electrode of described control element is connected with the source electrode of described optical sensor, and the source electrode of described control element is connected with described optical sensor signal line.
In the present embodiment, above-mentioned public electrode wire is arranged between two controlling grid scan lines in the middle of adjacent two row sub-pixels, as shown in Figure 9; Optical sensor 111 in described optical sensing unit is arranged on above this public electrode wire.Like this, public electrode wire need not take the area of pixel region again, can reduce public electrode wire to the impact of pixel aperture ratio.
In conjunction with shown in Figure 9, public electrode wire 114 is arranged between two adjacent controlling grid scan lines 115, and these two controlling grid scan lines 115 are again simultaneously between two adjacent row sub-pixs.Transparent common electrode 122 in the two row sub-pixs of up and down realizes being electrically connected to public electrode wire 114 by the second connecting electrode 121.
Optical touch sensing in the present embodiment realize principle and embodiment one basic identical, repeat no more herein.
As shown in Figure 7, when finger or laser pen when touching the double grid array base palte, be placed in the surround lighting of the opening part on the optical sensing unit or add the light intensity that light source produces and change, cause optical sensor 111(Photo TFT) light leakage current change, thereby because the variation of light leakage current causes the change in voltage of Cst2.When controlling grid scan line passed into the grid start signal in the overlay area, touch point, control element 112 was also opened thereupon, and the signal of variation is by control element 112(Readout TFT) feed back to optical sensor signal line 113; Optical sensor signal line 113 is delivered to the touch location decision circuitry with output signal and processes, by the position of touch location decision circuitry by the intensity of this output signal and time are processed to judge the touch point.
In the utility model, optical sensing unit 11 can be on double grid array base palte 10 arrangement in a row, also can arrangement in column on double grid array base palte 10.Particularly, described optical sensing unit becomes matrix to arrange, and is arranged between sets of adjacent pixels, and each pixel groups is comprised of a plurality of sub-pixels that become matrix to arrange; Each pixel groups comprises delegation's sub-pixel at least, and/or, comprise at least three row sub-pixels.For example, be provided with delegation's optical sensing unit between can every two row sub-pixels, be provided with a row optical sensing unit between every three row sub-pixels.Further, the optical sensing unit can all be set between every two row sub-pixels, can every two row or more multirow delegation's optical sensing unit is set, can also every four row or more multiple row one row optical sensing unit is set, specifically can according to actual conditions (such as to power consumption or touch the requirement of precision) suitably change arrangement mode and the quantity of optical sensing unit 11.
Wherein the optical sensor in above-mentioned touch display unit and described control element are thin film transistor (TFT) TFT, and the method for making of the touch display unit of the utility model embodiment comprises the following steps:
Step 1, forms the grid of pixel TFT, the grid of optical sensor and grid, controlling grid scan line and the public electrode wire of control element by composition technique for the first time on substrate, described public electrode wire is between two controlling grid scan lines of adjacent two row sub-pixels centres;
In above-mentioned steps 1, the grid of described control element (Readout TFT) is connected with controlling grid scan line, perhaps also can directly be served as by controlling grid scan line.
Deposit ITO on the substrate that is formed with grid, controlling grid scan line and public electrode wire, by the transparent common electrode of composition technique formation for the second time.
Wherein, described source electrode, drain electrode can be pixel TFT, optical sensing TFT(Photo TFT) and source electrode and the drain electrode of control element (Readout TFT).Utilize same mask(mask plate) make the scheme that metal layer pattern is leaked in active layer and source, belonged to for a person skilled in the art routine techniques, repeat no more herein.
After completing steps 3, the source electrode of optical sensing TFT is connected with the drain electrode of control element, and perhaps the drain electrode of the source electrode of optical sensing TFT and control element is into a single integrated structure; Simultaneously, the source electrode of control element is connected with the optical sensor signal line.
Step 4, form the figure of the insulation course that includes the pixel electrode via hole by the 4th composition technique on the substrate that is formed with the source electrode of thin film transistor (TFT), drain electrode and data line and optical sensor signal line, connect via hole first on the figure of insulation course comprises the grid that lays respectively at optical sensor and is connected, and lay respectively at described public electrode wire top and be connected the second connection via hole of public electrode top.
The position of described pixel electrode via hole is positioned at the drain electrode top of pixel TFT, simultaneously need to be at optical sensing TFT(Photo TFT) grid (or grid lead wire) and drain electrode corresponding region via hole (viahole) is set so that connect grid and the drain electrode of optical sensing TFT by subsequent technique.
Pixel electrode is connected with the drain electrode of pixel TFT by the pixel electrode via hole, the first connecting electrode that is formed by the ITO material is electrically connected to the drain and gate generation of optical sensing TFT respectively by the first connection via hole above the drain and gate of optical sensing TFT, and then the grid of optical sensing TFT is connected with drain electrode.The transparent common electrode of described the second connecting electrode in order to connect public electrode wire and to be made by ITO, can provide public voltage signal to transparency electrode first, second utilize the second connecting electrode the transparent common electrode of up and down two row sub-pixels to be connected the homogeneity of the whole panel that can improve common electric voltage.Described the first connecting electrode, the second connecting electrode arrange but do not produce any electrical connection with layer with pixel electrode.
The optical sensing unit of touch display unit of the present utility model is arranged between two adjacent subpixels of double grid array base palte, wherein, between these two adjacent sub-pixels, data line is not set, optical sensing cell distance data line is far away like this, just do not need to do again extra design with the spacing between assurance optical sensor signal line and data line, thereby can not affect the aperture opening ratio of whole display panel; And the distance between optical sensing unit and data line is distant, can reduce data line signal to the interference of optical sensing unit, touches precision and accuracy thereby improve.And, public electrode wire is arranged between adjacent two grid lines of adjacent double grid array base palte, can further reduce public electrode wire to the impact of pixel aperture ratio.
In the above-described embodiments, be take TN type or ADS type array base palte as example, introduce the touch display unit in the utility model; For for the in-cell touch display unit of VA type, IPS type array base palte; can be suitable for the scheme that provides in the utility model embodiment equally, therefore the touch display unit based on type of drive array base paltes such as VA type, IPS types all should belong to protection domain of the present utility model.
The utility model embodiment also provides a kind of display device, comprises touch display unit as above.This display device can for: liquid crystal panel, Electronic Paper, oled panel, LCD TV, liquid crystal display, digital album (digital photo frame), mobile phone, panel computer etc. have product or the parts of any Presentation Function.
The above is preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from principle described in the utility model; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (8)
1. touch display unit, comprise double grid array base palte and touch signal position judgment circuit, be provided with a plurality of sub-pixel of matrix, many controlling grid scan lines and many data lines of being arranged on described double grid array base palte, be provided with two controlling grid scan lines between adjacent two row sub-pixels, be provided with a data line every two row sub-pixels, it is characterized in that, described touch display unit also comprises:
A plurality of optical sensing unit that are arranged on described double grid array base palte, this optical sensing unit is used for giving birth to output signal according to the illumination variation volume production that receives, and described output signal is passed to described touch location decision circuitry by the optical sensor signal line, judge touch location by described touch location decision circuitry according to the described output signal that receives;
Wherein, described optical sensor signal line does not arrange data line between this two row adjacent subpixels between two row adjacent subpixels.
2. touch display unit according to claim 1, is characterized in that, described optical sensing unit comprises:
Optical sensor be used for to receive the surround lighting that gets from the opening that is placed on optical sensor or adds light source, and producing output signal;
Control element is used for controlling the output of described output signal, exports described output signal to described optical sensor signal line.
3. touch display unit according to claim 2, is characterized in that, described optical sensor and described control element are thin film transistor (TFT);
The grid of described optical sensor is connected with public electrode wire with drain electrode, and the source electrode of described optical sensor is connected with the drain electrode of control element;
The grid of described control element is connected with described controlling grid scan line, and the drain electrode of described control element is connected with the source electrode of described optical sensor, and the source electrode of described control element is connected with described optical sensor signal line.
4. touch display unit according to claim 3, is characterized in that, described optical sensing unit is positioned at the pixel region that is defined by described controlling grid scan line and described data line, and described public electrode wire extends in described pixel region.
5. touch display unit according to claim 3, is characterized in that, described public electrode wire is arranged between two controlling grid scan lines in the middle of adjacent two row sub-pixels; The optical sensor of described optical sensing unit is arranged on above this public electrode wire.
6. the described touch display unit of any one according to claim 1 to 5, is characterized in that, described optical sensing unit becomes matrix to arrange, and is arranged between sets of adjacent pixels, and described pixel groups is comprised of a plurality of sub-pixels that become matrix to arrange.
7. touch display unit according to claim 6, is characterized in that, described pixel groups comprises delegation's sub-pixel at least; And/or,
Described pixel groups comprises at least three row sub-pixels.
8. a display device, is characterized in that, comprises touch display unit as described in any one in claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220696175 CN202976027U (en) | 2012-06-13 | 2012-12-14 | Touch display device and display part |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220278703 | 2012-06-13 | ||
| CN201210196093.0 | 2012-06-13 | ||
| CN201210196093 | 2012-06-13 | ||
| CN201220278703.7 | 2012-06-13 | ||
| CN 201220696175 CN202976027U (en) | 2012-06-13 | 2012-12-14 | Touch display device and display part |
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| CN202976027U true CN202976027U (en) | 2013-06-05 |
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| CN 201220696175 Expired - Lifetime CN202976027U (en) | 2012-06-13 | 2012-12-14 | Touch display device and display part |
| CN201210545924.0A Expired - Fee Related CN103019476B (en) | 2012-06-13 | 2012-12-14 | Touch display unit and preparation method thereof, display device |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210545924.0A Expired - Fee Related CN103019476B (en) | 2012-06-13 | 2012-12-14 | Touch display unit and preparation method thereof, display device |
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| CN (2) | CN202976027U (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103294283B (en) | 2013-05-17 | 2017-05-03 | 京东方科技集团股份有限公司 | Optical sensing type embedded touch screen and display device |
| TWI540480B (en) * | 2014-03-05 | 2016-07-01 | 緯創資通股份有限公司 | Optical touch apparatus and optical touch method |
| CN104898896B (en) | 2015-05-12 | 2018-06-22 | 京东方科技集团股份有限公司 | A kind of array substrate and preparation method thereof, optical touch screen and display device |
| CN104934008A (en) * | 2015-07-09 | 2015-09-23 | 京东方科技集团股份有限公司 | Array substrate and driving method thereof, display panel and display apparatus |
| CN104991364B (en) | 2015-07-21 | 2018-10-30 | 京东方科技集团股份有限公司 | A kind of array substrate and its driving method, display panel, display device |
| CN105093611B (en) | 2015-07-21 | 2018-09-11 | 京东方科技集团股份有限公司 | A kind of array substrate and its driving method, display panel, display device |
| CN106940602B (en) * | 2017-03-14 | 2020-04-03 | 合肥鑫晟光电科技有限公司 | Display panel, photosensitive touch circuit and control method thereof |
| TWI718378B (en) * | 2018-05-23 | 2021-02-11 | 友達光電股份有限公司 | Optical detection device and detection method thereof |
| CN109859720B (en) * | 2019-04-02 | 2021-01-08 | 京东方科技集团股份有限公司 | Display panel, driving method and manufacturing method thereof, and display device |
| CN110534065B (en) * | 2019-09-03 | 2021-05-11 | 京东方科技集团股份有限公司 | Display panel, driving method thereof and display module |
-
2012
- 2012-12-14 CN CN 201220696175 patent/CN202976027U/en not_active Expired - Lifetime
- 2012-12-14 CN CN201210545924.0A patent/CN103019476B/en not_active Expired - Fee Related
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| CN103019476A (en) | 2013-04-03 |
| CN103019476B (en) | 2016-07-06 |
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