TWI438660B - Touch display panel - Google Patents

Description

Touch display panel

The present invention relates to a touch display panel, and more particularly to a touch display panel having high brightness.

In recent years, with the rapid development and wide application of information technology, wireless communication and information appliances, the operation interface of many information products has changed from a traditional keyboard or mouse to a touch panel as an input device.

At present, the common touch display device is assembled after the touch panel and the display panel are separately manufactured, and then the touch panel and the display panel are assembled, so that there are disadvantages such as high cost, heavy weight, and low light transmittance. In order to improve the above disadvantages, the touch panel and the display panel are integrated into the same panel to form a liquid crystal display panel having a touch function.

FIG. 1 is a schematic diagram of a simple circuit of a conventional touch display panel. Referring to FIG. 1 , in the circuit design, the touch display panel 100 includes a plurality of pixel structures 10 a , a plurality of read lines 30 , and a common electrode 10 b . Each of the pixel structures 10a includes a first thin film transistor 20, a second thin film crystal 22, a third thin film transistor 24, a pixel electrode 26, and a common electrode line 28. The gate of the first thin film transistor 20 is electrically connected to the scan line 12, the source is electrically connected to the data line 14, and the drain is electrically connected to the pixel electrode 26. Under such a circuit architecture, the storage capacitor _Cst is formed, for example, by the drain of the first thin film transistor 20 and the common electrode line 28, or the common electrode line 28 and the pixel electrode 26, or by other means. When the touch display panel 100 performs display, the pixel electrode 26 also has a voltage difference with a common electrode 10b to form a liquid crystal capacitor C _lc between the pixel electrode 26 and the common electrode 10b.

In particular, the second thin film crystal 22 and the third thin film transistor 24 constitute an element capable of performing a touch function. The gate of the second thin film transistor 22 is electrically connected to the scan line 12 of the other pixel structure, and the source of the second thin film transistor 22 is electrically connected to the drain of the third thin film transistor 24. The drain of the second thin film transistor 22 is electrically connected to the read line 30. Further, the gate and the source of the third thin film transistor 24 are simultaneously connected to the common electrode line 28.

When the light received by the third thin film transistor 24 changes, the photocurrent generated by the third thin film transistor 24 can be used as a light sensing signal. The optical sensing signal can be read through the second thin film transistor 22 and transmitted to a signal processor via the read line 30. For example, when the touch display panel 100 is touched by the finger, the position of the contact point between the finger and the touch display panel generates a light sensing signal, and the touch display panel can be processed through the processing of the light sensing signal. The position of the contact point on the 100 is positioned.

However, in the above touch display panel 100, since each of the pixel structures 10a is provided with a plurality of first thin film transistors 20, second thin film transistors 22, third thin film transistors 24, and read lines 26, etc. An opaque component. Therefore, the aperture ratio of the touch display panel 100 is affected to a considerable extent, resulting in poor display brightness.

The invention provides a touch display panel which has a high aperture ratio and can be improved The brightness of the screen.

The invention provides a touch display panel comprising a first substrate, a second substrate and a display medium layer. The first substrate is provided with a plurality of first scan lines, a plurality of second scan lines, a plurality of data lines, a plurality of first pixel structures, a plurality of second pixel structures, a plurality of common electrode lines, and a plurality of readings. Take the line and a plurality of photosensitive thin film transistors. The plurality of first scan lines and the plurality of second scan lines are arranged in parallel with each other, and the plurality of data lines intersect the plurality of first scan lines and the plurality of second scan lines. The plurality of first pixel structures are electrically connected to the plurality of first scan lines and the plurality of data lines. The plurality of second pixel structures are electrically connected to the second scan line and the data line. The plurality of common electrode lines traverse the plurality of first pixel structures and the plurality of second pixel structures. A plurality of read lines are disposed on the first substrate, and each read line is located between two adjacent data lines. A plurality of photosensitive thin film transistors are disposed on the first substrate. Each of the photosensitive thin film transistors is electrically connected to one of the common electrode lines, one of the read lines, and one of the first pixel structures. Alternatively, each of the photosensitive thin film transistors is electrically connected to one of the common electrode lines, one of the read lines, and one of the second pixel structures. A common electrode is disposed on the second substrate. The display medium layer is disposed between the first substrate and the common electrode of the second substrate.

In an embodiment of the invention, the touch display panel includes a first active element and a first pixel electrode. The first pixel electrode is electrically connected to the data line through the first active component, and the first active component is a thin film transistor. The first active component includes a first gate, a first source, and a first drain. The first gate is electrically connected to the first scan line. The first source is electrically connected to the data line. The first drain is electrically connected to the first pixel electrode.

In an embodiment of the invention, the touch display panel described above, wherein each of the second pixels The structure includes a second active component and a second pixel electrode. The second pixel electrode is electrically connected to the data line through the second active component, and the second active component is a thin film transistor. The second active component includes a second gate, a second source, and a second drain. The second gate is electrically connected to the second scan line. The second source is electrically connected to the data line. The second drain is electrically connected to the second pixel electrode.

In one embodiment of the present invention, the touch display panel, wherein each of the photosensitive thin film transistors includes a first end, a second end, and a third end. The first end is electrically connected to one of the common electrode lines. The second end is electrically connected to one of the first pixel structures or one of the second pixel structures. The third end is electrically connected to one of the read lines.

In an embodiment of the invention, the first end, the second end, and the third end are a third gate, a third source, and a third drain, respectively.

In an embodiment of the invention, the touch display panel, wherein each of the photosensitive thin film transistors is disposed in one of the first pixel structures or one of the second pixel structures.

In an embodiment of the invention, in the above touch display panel, the number of photosensitive thin film transistors is less than the sum of the number of first pixel structures and second pixel structures.

In an embodiment of the invention, in the above touch display panel, each common electrode line has a voltage value, and the voltage value is maintained at a negative value.

In an embodiment of the invention, the touch display panel, wherein the display medium layer is a liquid crystal layer.

In an embodiment of the invention, the touch display panel further includes a gate driver, a source driver, and a signal processor. The gate driver is electrically connected to the plurality of first scan lines and the plurality of second scan lines, the source driver is electrically connected to each of the data lines, and the signal processor is electrically connected to the plurality of read lines.

In one embodiment of the invention, the signal processor described above includes an amplifier, a decoder, and a driver.

Based on the above, since the touch display panel of the present invention integrates the photosensitive thin film transistor into the circuit structure of the double scan line, wherein the read line does not affect the aperture ratio of the original pixel structure, the touch of the present invention The display panel can have a higher aperture ratio, which can improve the brightness of the display screen.

The above described features and advantages of the present invention will be more apparent from the following description.

10a‧‧‧ pixel structure

10b, 304‧‧‧ common electrode

12‧‧‧ scan line

14,330‧‧‧Information line

20‧‧‧First film transistor

22‧‧‧Second thin film transistor

24‧‧‧ Third thin film transistor

26‧‧‧ pixel electrodes

28, 380‧‧‧ common electrode line

30‧‧‧Reading line

100, 300‧‧‧ touch display panel

301‧‧‧First substrate

302‧‧‧second substrate

303‧‧‧Display dielectric layer, liquid crystal layer

305‧‧‧Reading line

306‧‧‧Photosensitive thin film transistor

306a, 306b, 306c‧‧‧ channel layer

306g‧‧‧ first end

306s‧‧‧second end

306d‧‧‧ third end

310‧‧‧First scan line

320‧‧‧Second scan line

340‧‧‧ first pixel electrode

340a‧‧‧first pixel structure

350‧‧‧First active component

350g‧‧‧first gate

350s‧‧‧first source

350d‧‧‧First bungee

360‧‧‧Second pixel electrode

360a‧‧‧second pixel structure

370‧‧‧Second active components

370g‧‧‧second gate

370s‧‧‧second source

370d‧‧‧second bungee

510‧‧ ‧ gate driver

520‧‧‧Source Driver

530‧‧‧Signal Processor

532‧‧Amplifier

534‧‧‧Decoder

536‧‧‧ drive

801, 802‧‧‧ curve

C‧‧‧Contact area

C _st ‧‧‧ storage capacitor

C _lc ‧‧‧Liquid Crystal Capacitor

F‧‧‧ finger

G, g, H, h‧‧‧ light signal

G1‧‧‧ brake insulation

L, L1‧‧‧ rays

P‧‧‧ protective layer

W‧‧‧Contact window opening

FIG. 1 is a schematic diagram of a simple circuit of a conventional touch display panel.

2 is a side view of a touch display panel according to an embodiment of the invention.

3 is a schematic view showing the circuit structure of the touch display panel of FIG. 2.

4 is a partial top plan view of the touch display panel of FIG. 2.

FIG. 5 is a cross-sectional view of the touch display panel of FIG. 4 along line A-A'.

FIG. 6 is a schematic diagram of a touch display panel according to another embodiment of the present invention.

FIG. 7 is a schematic diagram of a touch display panel according to still another embodiment of the present invention.

Fig. 8 is a graph showing voltage-current characteristics of the photosensitive thin film transistor 306 used in the present invention.

FIG. 9 is a schematic diagram of a touch display panel according to an embodiment of the invention.

FIG. 10 is a schematic view showing the first operation of the touch display panel of the present invention, in which only a part of the components are shown.

Figure 11 is a schematic diagram of a light sensing signal corresponding to the first actuation of Figure 10.

FIG. 12 is a schematic view showing the second operation of the touch display panel of the present invention, in which only a part of the components are shown.

Figure 13 is a schematic diagram of a light sensing signal corresponding to the second actuation of Figure 12.

FIG. 2 is a side view of the touch display panel 300 according to an embodiment of the invention. FIG. 3 is a schematic diagram showing the circuit structure of the touch display panel 300 of FIG. 2 . 4 is a partial top plan view of the touch display panel 300 of FIG. 2 . FIG. 5 is a cross-sectional view of the touch display panel 300 of FIG. 4 along a line segment A-A'.

Referring to FIG. 2 , FIG. 3 , FIG. 4 and FIG. 5 , the touch display panel 300 includes a first substrate 301 , a second substrate 302 , and a display medium layer 303 . The first substrate 301 is provided with a plurality of first scan lines 310, a plurality of second scan lines 320, a plurality of data lines 330, a plurality of first pixel structures 340a, a plurality of second pixel structures 360a, and a plurality of common elements. The electrode line 380, the plurality of read lines 305, and the plurality of photosensitive thin film transistors 306. In the present embodiment, the first substrate 301 and the second substrate 302 are, for example, glass substrates, and the display medium layer 303 is made of, for example, a liquid crystal material. Of course, the invention is not limited thereto. Further, a common electrode 304 is provided on the second substrate 302. The display medium layer 303 is disposed on the first substrate 301 is between the common electrode 304 of the second substrate 302.

The plurality of first scan lines 310 and the plurality of second scan lines 320 are arranged in parallel with each other, and the plurality of data lines 330 intersect the plurality of first scan lines 310 and the plurality of second scan lines 320. Actually, the extending direction of the data line 330 is, for example, perpendicular to the extending direction of the first scanning line 310 and the second scanning line 320.

The plurality of first pixel structures 340a are electrically connected to the plurality of first scan lines 310 and the plurality of data lines 330. In the present embodiment, each of the first pixel structures 340a includes a first active device 350 and a first pixel electrode 340. The first pixel electrode 340 is electrically connected to the data line 330 through the first active device 350, and the first active device 350 is, for example, a thin film transistor. The first active device 350 includes a first gate 350g, a first source 350s, and a first drain 350d. The first gate 350g is electrically connected to the first scan line 310. In some embodiments, the first gate 350g may be a part of the first scan line 310. In addition, the first source 350s is electrically connected to the data line 330, and the first drain 350d is electrically connected to the first pixel electrode 340.

The plurality of second pixel structures 360a are electrically connected to the plurality of second scan lines 320 and the plurality of data lines 330. In the present embodiment, each of the second pixel structures 360a includes a second active element 370 and a second pixel electrode 360. The second pixel electrode 360 is electrically connected to the data line 330 through the second active device 370, and the second active device 370 is, for example, a thin film transistor. The second active component 370 includes a second gate 370g, a second source 370s, and a second drain 370d. The second gate 370g is electrically connected to the second scan line 320. In some embodiments, the second gate 370g may be a part of the second scan line 320. In addition, the second source 350s is electrically connected to the data line 330, and the second drain 370d is electrically connected to the second pixel electrode 360.

When the touch display panel 300 performs display, the plurality of first pixel electrodes 340 and the plurality of second pixel electrodes 360 respectively have a voltage difference from the common electrode 304 to form a liquid crystal capacitor C _lc in the liquid crystal layer 303.

It can be seen that the touch display panel 300 is such that two adjacent pixel structures 340a, 360a share a single data line 330. As a result, the number of driving chips connected to the data line 330 can be greatly reduced to reduce the cost requirement of the touch display panel 300.

Further, a plurality of common electrode lines 380 traverse the plurality of first pixel structures 340a and the plurality of second pixel structures 360a. In the touch display panel 300, the first pixel electrode 340 and the second pixel electrode 360 form a storage capacitor C _st with the common electrode line 380, respectively. However, the invention is not limited thereto. The storage capacitor C _st helps maintain the stability of the liquid crystal capacitor C _{lc and} the touch display panel 300 has good display quality.

A plurality of read lines 305 are disposed on the first substrate 301, and each read line 305 is located between two adjacent data lines 330. More specifically, the read line 305 is alternately disposed on the first substrate 301 with the data line 330. It is worth mentioning that the display aperture ratio of the touch display panel 300 is greater than that of the touch display panel of the prior art, because the position of the read line 305 does not affect the display aperture ratio of the touch display panel 300. The aperture ratio of 100. That is to say, the display screen of the touch display panel 300 will have a higher brightness.

When the touch display panel 300 performs display, the first pixel structure 340a and the second pixel structure 360a are different from each other, so the first pixel structure 340a and the second pixel structure 360a must be separated from each other. Therefore, in this embodiment, the read line 305 and the data line 330 are disposed between the first pixel structure 340a and the second pixel structure 360a. There is a negative influence on the aperture ratio of the touch display panel 300. That is to say, in the present embodiment, the read line 305 is disposed in an area of the touch display panel 300 where the display screen is not originally provided. In this way, the read line 305 can provide the function of transmitting the touch signal without affecting the display aperture ratio.

In the embodiment, a plurality of photosensitive thin film transistors 306 are disposed on the first substrate 301. Each of the photosensitive thin film transistors 306 is electrically connected to one of the common electrode lines 380, one of the read lines 305, and one of the second pixel structures 360a. That is, each of the photosensitive thin film transistors 306 is disposed in one of the second pixel structures 340a. In some embodiments, each of the photosensitive thin film transistors 306 may also be disposed in one of the first pixel structures 340a. At this time, each of the photosensitive thin film transistors 306 is electrically connected to one of the common electrode lines 380, one of the read lines 305, and one of the first pixel structures 340a.

Each of the photosensitive thin film transistors 306 includes a first end 306g, a second end 306s, and a third end 306d. The first end 306g is, for example, a third gate electrically connected to one of the common electrode lines 380. The second end 306s is, for example, a third source electrically connected to one of the second pixel structures 360a, but the invention is not limited thereto. In other embodiments, when each of the photosensitive thin film transistors 306 is disposed on one of the first pixel structures 340a, the second end 306s may also be electrically connected to one of the first pixel structures 340a. In addition, the third end 306d is, for example, a third drain electrically connected to one of the read lines 305.

In addition, as can be seen from FIG. 5, the touch display panel 300 further includes a film layer such as a gate insulating layer G1, channel layers 306a, 306b, and 306c, and a protective layer P. The gate insulating layer G1 and the protective layer P can provide appropriate isolation to make the end dimensions of the photosensitive thin film transistor 306 Hold a certain insulation relationship. The channel layers 306a, 306b, 306c are disposed between the first end 306g, the second end 306s, and the third end 306d to serve as a channel for the photosensitive thin film transistor 306.

In this embodiment, the second end 306s of the photosensitive thin film transistor 306 is electrically connected to the second drain 370d of the second active component 370. In particular, the second end 306s of the photosensitive thin film transistor 306 is electrically connected to the second drain 370d through the second pixel electrode 360. As shown in FIG. 4 and FIG. 5, for example, a contact window opening W may be disposed above the second drain 370d and above the second end 306s to pass the second end 306s through the second pixel electrode 360 and the second drain 370d electrical connection.

In the present embodiment, each of the second pixel structures 360a has a photosensitive thin film transistor 306, but the invention is not limited thereto. In some embodiments, the number of photosensitive thin film transistors 306 may be less than the sum of the number of first pixel structures 340a and second pixel structures 360a. In other words, only a portion of the first pixel structure 340a or the second pixel structure 360a has a photosensitive thin film transistor 306.

FIG. 6 is a schematic diagram of a touch display panel according to another embodiment of the present invention. FIG. 7 is a schematic diagram of a touch display panel according to still another embodiment of the present invention. Wherein, the same components are denoted by the same symbols, and will not be repeated below. For example, as shown in FIG. 6, a photosensitive thin film transistor 306 can be disposed in every three pixel structures (consisting of a pixel electrode and an active element). Further, in the embodiment shown in Fig. 7, a photosensitive thin film transistor 306 may be provided in every four pixel structures. Of course, the present invention does not limit the number, position or distribution density of the photosensitive thin film transistor 306, which is well known in the art and can be changed as needed.

Fig. 8 is a graph showing voltage-current characteristics of the photosensitive thin film transistor 306 used in the present invention. Referring to FIG. 8, a curve 801 is a characteristic curve of the photosensitive thin film transistor 306 under light irradiation, and a curve 802 is a characteristic curve of the photosensitive thin film transistor 306 under no light irradiation. It can be seen that when the gate voltage of the photosensitive thin film transistor 306 is greater than 5 volts, the characteristic curve of the photosensitive thin film transistor 306 under light illumination is nearly parallel, and the difference is small. However, when the gate voltage of the photosensitive thin film transistor 306 is a negative value, there is a large difference in the characteristic curve of the photosensitive thin film transistor 306 under light irradiation or under no light.

For example, when the photosensitive thin film transistor 306 is under light and the gate voltage of the photosensitive thin film transistor 306 is negative, the induced current induced by the drain of the photosensitive thin film transistor 306 is greater than 10 ^{- 10} amps. When the photosensitive thin film transistor 306 is exposed to no light and the gate voltage of the photosensitive thin film transistor 306 is negative, the induced current induced by the drain of the photosensitive thin film transistor 306 is less than 10 ^-12 amps. That is to say, the photosensitive thin film transistor 306 is under the illumination of light or under the illumination of no light, and the difference can reach two orders of magnitude.

In the touch display panel 300 of the above embodiment, the voltage value of the common electrode line 380 is maintained at a negative value. Since the first end 306g of the photosensitive thin film transistor 306 is a gate, it is electrically connected to the common electrode line 380. Sexual connection, so the sensitivity of the photosensitive thin film transistor 306 to light changes will be greatly improved. With such a characteristic, the touch display panel 300 can utilize the photosensitive thin film transistor 306 as a design of the touch element.

FIG. 9 is a schematic diagram of a touch display panel according to an embodiment of the invention. Referring to FIG. 9 , the touch display panel 300 may be further connected with a gate driver 510 , a source driver 520 , and a signal processor 530 . Wherein, the gate driver is electrically connected to the plurality of first scans The source driver 520 is electrically connected to each of the data lines 330, and the signal processor 530 is electrically connected to the plurality of read lines 305. Further, the signal processor 530 can include an amplifier 532, a decoder 534, and a driver 536. Those skilled in the art will understand the other components required for the touch display panel 300, and will not be described herein.

FIG. 10 is a schematic view showing the first operation of the touch display panel 300 of the present invention, in which only a part of the components are shown. Figure 11 is a schematic diagram of a light sensing signal corresponding to the first actuation of Figure 10. Referring to FIG. 9 , FIG. 10 and FIG. 11 , in the embodiment, the light source used by the touch display panel 300 is, for example, a backlight, that is, the touch display panel 300 is, for example, a transmissive display. panel. As shown in FIG. 4, since the photosensitive thin film transistor 306 on the touch display panel 300 is located on an opaque metal layer (for example, a common electrode line), the photosensitive thin film transistor 306 is normally in a dark state. That is, there is no light L illumination.

When the finger F is in contact with the touch display panel 300, the light L is reflected by the finger F at the contact area C between the finger F and the touch display panel 300. Therefore, the photosensitive thin film transistor 306 under the contact region C will receive the reflected light L1, which will increase the induced current of the third end of the photosensitive thin film transistor 306 to generate a light sensing signal G, as shown in FIG. Shown.

The light sensing signal G described above can be transmitted to the signal processor 530 through the read line 305 on the touch display panel 300. However, the light-sensing signal G is attenuated during the transfer, and is finally attenuated to the light-sensing signal g when it reaches the signal processor 530. Since each photosensitive thin film transistor 306 connected to each of the read lines 305 has a different position, the path length of the light sensing signal G generated by each of the photosensitive thin film transistors 306 is also different. That is to say, on the same reading line 305, the photosensitive film transistor 306 at different positions will generate different degrees of attenuation of the light-sensing signal G generated. Thereby, the position of the contact area C on the touch display panel 300 can be located.

FIG. 12 is a schematic view showing the second operation of the touch display panel 300 of the present invention, in which only a part of the components are shown. Figure 13 is a schematic diagram of a light sensing signal corresponding to the second actuation of Figure 12. Referring to FIG. 9 , FIG. 12 and FIG. 13 , in the embodiment, the light source used by the touch display panel 300 is, for example, an external light source, that is, the touch display panel 300 is, for example, a reflective display panel. Therefore, the photosensitive thin film transistor 306 on the touch display panel 300 is normally in a bright state, that is, under the illumination of the light L.

When the finger F is in contact with the touch display panel 300 at the contact area C, part of the light L above the contact area C will be blocked by the finger F and cannot enter the touch display panel 300. Therefore, the photosensitive thin film transistor 306 under the contact region C will receive less light L. Thus, the induced current of the third end of the photosensitive thin film transistor 306 is reduced to generate the light sensitive signal H.

Similar to the description of the light sensing signal G described above, the light sensing signal H can also be transmitted to the signal processor 530 through the reading line 305 on the touch display panel 300. The light-sensing signal H is also attenuated during the transfer process. When the signal processor 530 is finally reached, the light sensing signal H is attenuated to the light sensing signal h. Similarly, on the same read line 305, the photosensitive thin film transistor 306 at different positions will produce different degrees of attenuation of the light-sensing signal H generated. Thereby, the position of the contact area C on the touch display panel 300 can be located.

In summary, since the touch display panel of the present invention is a photosensitive thin film transistor In the circuit architecture of the dual scan line, the read line is located between two adjacent data lines, and does not affect the aperture ratio of the original pixel structure. Therefore, the touch display panel of the present invention has a high aperture ratio and can improve the brightness of the display screen.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

300‧‧‧Touch display panel

304‧‧‧Common electrode

305‧‧‧Reading line

306‧‧‧Photosensitive thin film transistor

306d‧‧‧ third end

306g‧‧‧ first end

310‧‧‧First scan line

320‧‧‧Second scan line

330‧‧‧Information line

340‧‧‧ first pixel electrode

350‧‧‧First active component

360‧‧‧Second pixel electrode

370‧‧‧Second active components

380‧‧‧Common electrode line

340a‧‧‧first pixel structure

360a‧‧‧second pixel structure

C _st ‧‧‧ storage capacitor

C _lc ‧‧‧Liquid Crystal Capacitor

Claims (11)

A touch display panel includes: a first substrate, wherein: a plurality of first scan lines and a plurality of second scan lines are arranged in parallel with each other; a plurality of data lines, and the first scan lines and the The second scan line intersects; the plurality of common electrode lines traverse the first pixel structure and the second pixel structures; and the plurality of read lines, wherein the read lines are located on two adjacent data lines The plurality of read lines, the plurality of data lines, and the plurality of first and second scan lines define a plurality of adjacent first pixel structures and second pixel structures, the plurality of first pixels The structure is electrically connected to the first scan lines and the data lines, and the plurality of second pixel structures are electrically connected to the second scan lines and the data lines, and the adjacent columns between the two adjacent read lines The first pixel structure and the second pixel structure are both connected to the data line between the two adjacent read lines; and a plurality of photosensitive thin film transistors, wherein each of the photosensitive thin film transistors and one of the common electrode lines One of the read lines, one of the first pixel structures is electrically connected or a common electrode line, one of the read lines, one of the second pixel structures is electrically connected; a second substrate on which a common electrode is disposed; and a display medium layer disposed on the first substrate and the second Between the common electrodes of the substrate. The touch display panel of claim 1, wherein each of the first pixels The structure includes a first active component and a first pixel electrode. The first pixel electrode is electrically connected to the data line through the first active component, and the first active component is a thin film transistor, and the method includes: a first gate electrically connected to the first scan line; a first source electrically connected to the data line; and a first drain electrically connected to the first pixel electrode. The touch display panel of claim 1, wherein each of the second pixel structures comprises a second active component and a second pixel electrode, and the second pixel electrode transmits the second active component The second active device is electrically connected to the second active circuit And a second drain electrically connected to the second pixel electrode. The touch display panel of claim 1, wherein each of the photosensitive thin film transistors comprises: a first end electrically connected to one of the common electrode lines; a second end, and one of the first ends The pixel structure or one of the second pixel structures is electrically connected; and a third end is electrically connected to one of the read lines. The touch display panel of claim 4, wherein the first end, the second end, and the third end are a third gate, a third source, and a third drain, respectively. The touch display panel of claim 1, wherein each of the photosensitive thin film transistors is disposed in one of the first pixel structures or one of the second pixel layers In the structure. The touch display panel of claim 1, wherein the number of the photosensitive thin film transistors is less than the sum of the first pixel structures and the second pixel structures. The touch display panel of claim 1, wherein each of the common electrode lines has a voltage value, and the voltage value is maintained at a negative value. The touch display panel of claim 1, wherein the display medium layer is a liquid crystal layer. The touch display panel of claim 1, further comprising a gate driver, a source driver, and a signal processor, the gate driver electrically connecting the first scan lines and the second a scan line, the source driver is electrically connected to each of the data lines, and the signal processor is electrically connected to the read lines. The touch display panel of claim 10, wherein the signal processor comprises an amplifier, a decoder and a driver.