TWI399680B - Touch display panel, touch display apparatus and control methods thereof - Google Patents

Description

Touch display panel, touch display device and control method thereof

The present invention relates to a display panel, a display device, and a control method thereof, and more particularly to a touch display panel, a touch display device, and a control method thereof.

With the continuous advancement of technology, various information devices are constantly being introduced. Among them, in terms of data input devices, in addition to generally inputting data by keyboard or mouse, using touch technology to input data is another choice of input methods. In addition to the visual and auditory senses, people still have a sense of touch, and with the continuous update of sensor technology, the touch sensor has become another choice for people to communicate with information devices.

On the other hand, traditional computer input interfaces (such as keyboards or mice) have some difficulties in operation for those who are not familiar with the computer, and one of the obstacles to the popularization of computers. In order to provide a more intuitive operating device, recently, the industry has actively developed a touch display panel.

Generally, a touch display panel is additionally provided with a touch panel on a display surface of a display panel (for example, a liquid crystal display panel). However, the additionally provided touchpad not only increases the overall thickness of the touch display panel, but also increases the material cost. Recently, some operators have integrated a touch panel into a display panel, thereby saving material cost and reducing the thickness of the touch display panel.

In addition, the touch display panel has a user-friendly input interface feature, so that users of any age can directly input data with a finger or a stylus or select a function option on the touch display panel. When the user touches the touch display panel with a finger, for example, the touch display panel can determine the touch position according to an external light source change.

Therefore, how to provide a touch display panel, a touch display device and a control method thereof for accurately determining a touch position according to changes in an external light source of the light sensing element is one of the current important topics.

In view of the above problems, an object of the present invention is to provide a touch display panel, a touch display device, and a control method thereof that accurately determine a touch position by a light sensing element according to changes in an external light source.

To achieve the above objective, the present invention provides a touch display panel comprising a first substrate and a second substrate. The first substrate has a light shielding layer. The second substrate is disposed opposite to the first substrate and has a touch unit and a reading unit. The touch unit has a first light sensing element and a second light sensing element. The first light sensing element is electrically connected to a first bias line and disposed opposite to a portion of the light shielding layer. The second light sensing component is electrically connected to the first light sensing component and a second biasing line. The second light sensing component changes the external light source to cause the touch unit to output a touch signal. The reading unit is electrically connected to the touch unit, and outputs an inductive output value according to the touch signal.

To achieve the above objective, the present invention provides a control method for a touch display panel, wherein the touch display panel has a first substrate and a second substrate. The first substrate has a light shielding layer. The second substrate is disposed opposite to the first substrate and has a touch unit and a reading unit. The touch unit has a first light sensing element and a second light sensing element. The first light sensing element is electrically connected to a first bias line and disposed opposite to a portion of the light shielding layer. The second photo sensing element is electrically connected to the first photo sensing element and a second bias line, and the reading unit is electrically connected to the touch unit. The control method of the touch display panel includes the following steps: the second light sensing component outputs a touch signal according to an external light source change; and the sensing unit outputs an inductive output value according to the touch signal. .

To achieve the above objective, the present invention provides a touch display device comprising a backlight module and a touch display panel. The touch display panel is disposed opposite to the backlight module and has a first substrate and a second substrate. The first substrate has a light shielding layer. The second substrate is disposed opposite to the first substrate and has a touch unit and a reading unit. The touch unit has a first light sensing element and a second light sensing element. The first light sensing element is electrically connected to a first bias line and disposed opposite to a portion of the light shielding layer. The second light sensing component is electrically connected to the first light sensing component and a second biasing line. The second light sensing component changes the external light source to cause the touch unit to output a touch signal. The reading unit is electrically connected to the touch unit, and outputs an inductive output value according to the touch signal.

To achieve the above objective, the present invention provides a control method for a touch display device, wherein the touch display device has a backlight module and a touch display panel. The touch display panel is disposed opposite to the backlight module and has a first substrate and a second substrate. The first substrate has a light shielding layer. The second substrate is disposed opposite to the first substrate and has a touch unit and a reading unit. The touch unit has a first-light sensing element and a second light sensing element. The first light sensing element is electrically connected to a first bias line and disposed opposite to a portion of the light shielding layer. The second light sensing component is electrically connected to the first light sensing component and a second bias line. The reading unit is electrically connected to the touch unit. The control method of the touch display device includes the following steps: the second light sensing component outputs a touch signal according to an external light source change; and the sensing unit outputs an inductive output value according to the touch signal. .

To achieve the above objective, the present invention provides a touch display panel comprising a first substrate and a second substrate. The first substrate has a light shielding layer. The second substrate is disposed opposite to the first substrate and has a touch unit and a reading unit. The touch unit has a first light sensing element and a second light sensing element. The first light sensing element is disposed opposite to a portion of the light shielding layer. The second light sensing component is electrically connected to the first light sensing component and a bias line. The second light sensing component changes the external light source to cause the touch unit to output a touch signal. The reading unit is electrically connected to the touch unit, and outputs an inductive output value according to the touch signal.

To achieve the above objective, the present invention provides a control method for a touch display panel having a first substrate and a second substrate. The first substrate has a light shielding layer. The second substrate is disposed opposite to the first substrate and has a touch unit and a reading unit. The touch unit has a first light sensing element and a second light sensing element. The first light sensing element is disposed opposite to a portion of the light shielding layer, and the second light sensing element is electrically connected to the first light sensing element and a bias line. The reading unit is electrically connected to the touch unit. The control method of the touch display panel includes the following steps: the second light sensing component outputs a touch signal according to an external light source change; and the sensing unit outputs an inductive output value according to the touch signal. .

To achieve the above objective, the present invention provides a touch display device comprising a backlight module and a touch display panel. The touch display panel is disposed opposite to the backlight module and has a first substrate and a second substrate. The first substrate has a light shielding layer. The second substrate is disposed opposite to the first substrate and has a touch unit and a reading unit. The touch unit has a first light sensing element and a second light sensing element. The first light sensing element is disposed opposite to the portion of the light shielding layer, and the second light sensing element is electrically connected to the first light sensing element and a bias line, wherein the second light sensing element changes according to an external light source, and The touch unit outputs a touch signal. The reading unit is electrically connected to the touch unit, and outputs an inductive output value according to the touch signal.

To achieve the above objective, the present invention provides a control method for a touch display device, wherein the touch display device has a backlight module and a touch display panel. The touch display panel is disposed opposite to the backlight module and has a first substrate and a second substrate. The first substrate has a light shielding layer. The second substrate is disposed opposite to the first substrate and has a touch unit and a reading unit. The touch unit has a first light sensing element and a second light sensing element. The first light sensing element is disposed opposite to a portion of the light shielding layer, and the second light sensing element is electrically connected to the first light sensing element and a bias line. The reading unit is electrically connected to the touch unit. The control method of the touch display device includes the following steps: the second light sensing component outputs a touch signal according to an external light source change; and the sensing unit outputs an inductive output value according to the touch signal. .

According to the present invention, the touch display panel, the touch display device and the control method thereof are shielded by a light shielding layer to make it a reference light. Sensing component, and sensing an external light source by the second light sensing component, when the user directly touches the touch display device with a finger or a stylus, the second light sensing component senses different The brightness of the external light source enables the touch display device to output the touch signal accurately according to the change of the external light source, so that the position of the user touch can be known by the position determining circuit of the back end.

Hereinafter, a touch display panel, a touch display device and a control method thereof according to a plurality of embodiments of the present invention will be described with reference to related drawings.

First embodiment

Referring to FIG. 1 , the touch display panel 1 of the first embodiment of the present invention includes a first substrate 2 and a second substrate 3 . The first substrate 2 and the second substrate 3 are disposed opposite to each other, and a liquid crystal layer 4 is disposed between the first substrate 2 and the second substrate 3.

The first substrate 2 has a light shielding layer 21, which is, for example, a light shielding pattern, and the shape of the pattern is not limited thereto. The first substrate 2 of the embodiment further has a color filter layer 22 and a protective layer 23. The light shielding layer 21, the color filter layer 22, and the protective layer 23 are located between the first substrate 2 and the liquid crystal layer 4, the color filter layer 22 covers a portion of the light shielding layer 21, and the protective layer 23 covers a portion of the light shielding layer 21 and color. Filter layer 22. The color filter layer 22 has a plurality of color photoresists such as red (R), green (G), or blue (B). When a light passes through the color filter layer 22, it generates light of different colors such as red light, or green light or blue light according to different color photoresists. The first substrate 2 of the embodiment may be a color filter substrate.

In addition, in the embodiment, the light shielding layer 21 can be a black matrix, and the material thereof is made of an opaque material to reduce interference between red light or green light or blue light, thereby improving display quality.

Referring to FIG. 2, the second substrate 3 of the present embodiment is, for example, a transistor substrate having a plurality of data lines D ₁₁ to D _1n and a plurality of scanning lines S ₁₁ to S _1m . Among them, the scanning lines S ₁₁ to S _1m and the data lines D ₁₁ to D _1n are alternately arranged, and a plurality of areas are formed. The same circuit architecture can be set in each interlaced area.

To simplify the description, the following will scan line S _11, the circuit structure cross-section area of the data line D _11, and is formed of an example. As shown in FIG. 3 , the second substrate 3 further has a touch unit 311 and a reading unit 312 .

The touch unit 311 is electrically connected to the reading unit 312 and has a first photo sensing element 314 and a second photo sensing element 315. In this embodiment, the first photo sensing element 314 can include a photo transistor T ₁₁ , and the second photo sensing element 315 can include a photo transistor T ₁₂ .

The first end of the photo-electric crystal T _{11 is} electrically connected to a first bias line B ₁₁ , and one of the control ends of the photo-electric crystal T ₁₁ is electrically connected to a second end thereof. In this embodiment, the photo-electric crystal T ₁₁ is disposed opposite to a portion of the light-shielding layer 21, that is, a portion of the light-shielding layer 21 and the photo-transistor T ₁₁ are overlapped in a projection direction as a reference photo-crystal. Further, since the control terminal of the photo transistor T ₁₁ is electrically connected to its second end, therefore, T ₁₁ based phototransistors may be considered a light diode (Photodiode).

T phototransistor one first and second ends ₁₂ electrically connected the phototransistor _{T. 11, 12} and a second end electrically connected to a second bias line B, a control terminal and its second terminal electrically connected to a . The photoelectric crystal T ₁₂ of this embodiment is for sensing an external light source. In addition, since the control end of the photo-electric crystal T ₁₂ is electrically connected to the second end thereof, the photo-electric crystal T ₁₂ can be regarded as a photodiode.

As shown in FIG. 2 and FIG. 3 , the reading unit 312 is electrically connected to the touch unit 311 and the position determining circuit 34 , and has a read switch 316 , an operational amplifier 317 and a resistor 318 . An operational amplifier 317 having a positive input terminal, a negative input terminal and an output terminal, wherein the positive input terminal receives a reference signal V _REF, a negative input terminal 316 is electrically connected via a read line and the read switch R _11, read The switch 316 is electrically connected to the first photo sensing element 314 and the second photo sensing element 315, and the resistor 318 is electrically connected to the negative input end and the output end of the operational amplifier 317. In the present embodiment, the read switch 316 can be a transistor T ₁₃ . In practice, the read unit 312 can be disposed in the position determining circuit 34 . In addition, the touch display panel 1 has a plurality of read lines R ₁₁ to R _1n , wherein the same read line, for example, the read line R ₁₁ , can be electrically connected to the plurality of read switches 316 and one operational amplifier 317 . In the present embodiment, the read switch 316 is not limited to have the same number as the operational amplifier 317.

The second substrate 3 of the embodiment further has a pixel unit 313 disposed adjacent to the touch unit 311. The pixel unit 313 has a pixel switch 319 and a pixel equivalent capacitance C ₁₁ . The pixel switch 319 is electrically connected to the scanning line S ₁₁ , the data line D _{11 ,} and the pixel equivalent capacitance C ₁₁ . In practice, the pixel equivalent capacitor C ₁₁ may include a liquid crystal capacitor C _LC1 and a storage capacitor C _ST1 electrically connected to each other, and the pixel switch 319 may include a transistor T ₁₄ . However, in this embodiment, the number of the touch units 311 in the touch display panel 1 can be adjusted according to the requirements of the user, and the touch unit 311 is not required to be disposed next to each of the pixel units 313. For example, a plurality of pixel units 313 may be a group, and a corresponding touch unit 311 is further disposed in each group.

The touch display panel 1 of the present embodiment further includes a data driving circuit 32, a scan driving circuit 33, and a position determining circuit 34, which are, for example but not limited to, disposed on the second substrate 3. However, it is well known to those skilled in the art that the data driving circuit 32, or a scan driving circuit 33, or a position determining circuit 34 can be respectively disposed on a printed circuit board (PCB) or integrated into a chip. It is electrically connected to the circuit on the second substrate 3.

Referring to FIG. 2 and FIG. 3 simultaneously, when the user touches the touch display panel 1, since the photonic crystal T ₁₂ does not receive the external light source, the photonic crystal T ₁₁ and the phototransistor T ₁₂ can be viewed separately. It is a photodiode, and the photodiode can be equivalent to a resistor. Therefore, the photonic crystal T ₁₁ and the phototransistor T ₁₂ can be equivalent to equivalent resistances having the same resistance value, respectively.

The touch unit 311 can transmit one of the first bias signals and the second bias line B ₁₂ according to the first bias line B _{11 to} transmit a second bias signal, and the phototransistor T ₁₁ and the phototransistor T ₁₂ A touch signal A _{11 is} output and transmitted to the reading unit 312.

At this time, when the scan line S ₁₁ transmits a high-level scan signal to conduct the transistor T ₁₃ , the touch signal A ₁₁ can be transmitted to the negative input of the operational amplifier 317 via the transistor T ₁₃ and the read line R _{11 .} end. The operational amplifier 317 outputs an induced output value V _O1 according to the touch signal A ₁₁ , the reference signal V _REF and the resistor 318 , and transmits it to the position determining circuit 34 .

In addition, when the user does not touch the touch display panel 1, since the photo-electric crystal T ₁₂ receives the external light source, the equivalent resistance value of the photo-crystal T ₁₂ is smaller than the equivalent resistance value of the photo-crystal T ₁₁ . However, it is known to those skilled in the art that, according to the above description, the operational amplifier 317 can output an induced output value V _O2 according to the touch signal A ₁₁ , the reference signal V _REF and the resistor 318 , and transmit it to the position. The circuit 34 is judged. Thereby, the position judging circuit 34 determines a touch position based on the output of the different inductive output values V _O1 or V _{O2 in the} respective interleaved regions.

As described above, in the present embodiment, the photoelectric crystal T ₁₁ is shielded by the light shielding layer 21 so that the equivalent resistance value is not changed by the external light source, and the photoelectric crystal T ₁₂ can be different depending on the external light source. The equivalent resistance value, and thus the photonic crystal T ₁₁ can be regarded as a reference photo-crystal. In addition, by determining the equivalent resistance value of the photodiodes T ₁₁ and T ₁₂ , it can also be used as one of the basis for determining whether the user touches the touch display panel 1 .

Second embodiment

Referring to FIG. 4, the touch display panel of the second embodiment of the present invention includes a data driving circuit 32, a scan driving circuit 33, a position determining circuit 34, a plurality of data lines D ₂₁ to D _2n, and a plurality of scanning lines. S ₂₁ ~ S _2m, wherein the data driving circuit 32, a scan driving circuit 33 and a position determination element characteristics and the functional circuit 34 of the first embodiment was described in detail in embodiment, is omitted herein.

Scan lines S ₂₁ ~ S _2m and the data lines D ₂₁ ~ D _2n disposed in a staggered line, and forming a plurality of regions. The same circuit architecture can be set in each interlaced area. For simplification of the description, the circuit structure of the scan line S ₂₁ , the data line D ₂₁ and the interleaved area formed therein will be exemplified below. As shown in FIG. 5 , the second substrate 3 ′ of the embodiment has a touch unit 511 and a reading unit 512 .

The touch unit 511 is electrically connected to the reading unit 512 and has a first light sensing element 514 and a second light sensing element 515. In this embodiment, the first photo sensing element 514 can include a photo transistor T ₂₁ , and the second photo sensing element 515 can include a photo transistor T ₂₂ .

One of the control ends of the photoelectric crystal T ₂₁ is electrically connected to a second end thereof. In this embodiment, the optoelectronic crystal T ₂₁ is disposed opposite to a portion of the light shielding layer 21 (as shown in FIG. 1 ), that is, a portion of the light shielding layer 21 and the phototransistor T ₂₁ are overlapped in a projection direction as a Photoelectric crystal for reference. In addition, since the control end of the photo-electric crystal T ₂₁ is electrically connected to the second end thereof, the photo-electric crystal T ₂₁ can be regarded as a photodiode.

T phototransistor ₂₂ one end of a first one of the photo transistor T ₂₁ is electrically connected to a second end, a second end electrically connected to a B bias line _21, a control terminal and its second terminal electrically connected to a. The photoelectric crystal T ₂₂ of this embodiment is for sensing an external light source. In addition, since the control end of the photo-electric crystal T ₂₂ is electrically connected to the second end thereof, the photo-electric crystal T ₂₂ can be regarded as a photodiode.

As shown in FIG. 5, the reading unit 512 is electrically connected to the touch unit 511 and the position determining circuit 34, and has a read switch 516, an operational amplifier 517 and a resistor 518. The operational amplifier 517 has a positive input terminal, a negative input terminal and an output terminal. The positive input terminal receives a reference signal V _REF , and the negative input terminal passes through a read line R ₂₁ and the photo transistor T ₂₁ and the photo transistor T _{22 .} Electrically connected, the read switch 516 is electrically connected to one of the first ends of the optoelectronic crystal T ₂₁ , the scan line S ₂₁ and a bias line B ₃₁ , and the negative input and output of the resistor 518 and the operational amplifier 517 are electrically connected. connection. In this embodiment, the read switch 516 can be a transistor T ₂₃ . In practice, the reading unit 512 can be disposed in the position determining circuit 34.

The second substrate 3 ′ of the embodiment further includes a pixel unit 513 , which is disposed adjacent to the touch unit 511 . The pixel unit 513 has a pixel switch 519 and a pixel equivalent capacitance C ₂₁ . The pixel switching system 519 the scan line S _21, the pixel data line D ₂₁ and the equivalent capacitance C ₂₁ is electrically connected. In practice, the pixel equivalent capacitor C ₂₁ may include a liquid crystal capacitor C _LC2 electrically connected to each other and a storage capacitor C _ST2 , and the pixel switch 519 may include a transistor T ₂₄ . However, in this embodiment, the number of the touch units 511 in the touch display panel can be adjusted according to the requirements of the user, and the touch unit 511 is not required to be disposed next to each of the pixel units 513, for example, A plurality of pixel units 513 can be a group, and a corresponding touch unit 511 is further disposed in each group.

Referring to FIG. 4 and FIG. 5 simultaneously, when the user touches the touch display panel, since the photo-crystal T ₂₁ does not receive the external light source, the photo-crystal T ₂₁ and the photo-crystal T ₂₂ can be regarded as respectively. A photodiode, and the diode can be equivalent to a resistor. Therefore, the photonic crystal T ₂₁ and the phototransistor T ₂₂ can be equivalent to equivalent resistances having the same resistance value, respectively.

At this time, when the scan line S ₂₁ transmits a high-level scan signal to conduct the transistor T ₂₃ , the bias line B ₃₁ transmits a bias signal V _{b1 to} be transmitted to the touch unit 511 via the transistor T _{23 .} . The touch unit 511 can be based on the bias signal line V _b1, based bias line B ₂₁ of the transfer bias voltage signal V _b2, photo transistor T ₂₁ and T ₂₂ outputs a phototransistor touch signal A _21, and transferred to the read Take unit 512.

The touch signal A ₂₁ can be transmitted to the negative input terminal of the operational amplifier 517 via the read line R ₂₁ . The operational amplifier 517 outputs an induced output value V _O3 according to the touch signal A ₂₁ , the reference signal V _REF and the resistor 518 , and transmits it to the position determining circuit 34 .

In addition, when the user does not touch the touch display panel, since the photo transistor T ₂₂ receives the external light source, the equivalent resistance value of the photo transistor T ₂₂ is smaller than the equivalent resistance value of the photo transistor T ₂₁ . However, it is known to those skilled in the art that, according to the above description, the operational amplifier 517 can output an induced output value V _O4 according to the touch signal A ₂₁ , the reference signal and the resistor 518 , and transmit it to the position determining circuit. 34. Thereby, the position judging circuit 34 determines a touch position based on the output of the different inductive output values V _O3 or V _{O4 in the} respective interleaved regions.

Please refer to FIG. 5 and FIG. 6 at the same time, wherein FIG. 6 is a timing diagram of the signal level transmitted by the scan line S ₂₁ and the bias line B ₂₁ . The scan line S ₂₁ transmits V _gon and V _goff respectively to turn on or off the transistors T ₂₄ and T ₂₃ , respectively, and the bias line B ₂₁ respectively transmits the bias signal V _b2 and the reference signal V _REF , and the other scan lines S ₂₂ ~S _2m and bias lines B ₂₂ to B _2m sequentially switch signal levels.

As described above, in the present embodiment, the photoelectric crystal T ₂₁ is shielded by the light shielding layer 21 so that the equivalent resistance value is not changed by the external light source, and the photoelectric crystal T ₂₂ can be different depending on the external light source. The equivalent resistance value, and thus the photonic crystal T ₂₁ can be regarded as a reference photo-crystal. In addition, by determining the equivalent resistance values of the photoelectric crystals T ₂₁ and T ₂₂ , it can also be used as a basis for determining whether the user touches the touch display panel.

In addition, when the scan line S ₂₁ transmits the scan signal of the high level, the bias lines B ₂₂ to B _2m respectively transmit a reference signal V _REF , and the operational amplifier 517 has the characteristics of a virtual short circuit, and the negative input has a negative input terminal. Referring to the voltage level of the signal V _REF , therefore, the first end and the second end of the photo-electric crystal T ₂₂ have the same voltage level, and the photo-crystal T ₂₂ is turned off, so that the photo-crystal T ₂₂ does not have leakage current. Generated to accurately determine the touch position.

Also, Please refer to FIG. 4, a second embodiment of the present embodiment substrate 3 'has a more complex read line R ₂₁ ~ R _2n, wherein, with a read line, for example, read line R _21, may be based The plurality of read switches 516 and one of the operational amplifiers 517 are electrically connected, and the operational amplifiers 517 can output the sensed output values according to the touch signals transmitted by the read switches 516. In the present embodiment, the read switch 516 is not limited to have the same number as the operational amplifier 517.

Referring to FIG. 7 , a touch display device 8 according to a preferred embodiment of the present invention includes a backlight module 6 and a touch display panel 7 . The backlight module 6 is disposed opposite to the display module 7.

In general, the backlight module 6 can be divided into a direct type and an edge type according to the position of the light source. In the embodiment, the backlight module 6 is described by taking a direct type as an example. The backlight module 6 includes a light source 61, a diffusion plate 62, at least one optical film group 63, and a back plate 64. The light source 61 is disposed between the back plate 64 and the diffusion plate 62.

When the light source 61 generates a light L1, it passes through the diffusion plate 62 and the optical film group 63 in order to provide a uniform light L1 to the touch display panel 7.

In this embodiment, the touch display panel 7 can be the touch display panel 1 of the first embodiment or the touch display panel of the second embodiment, and the functions, circuits, and actuation modes thereof have been As described in the previous embodiments, no further details are provided herein.

Referring to FIG. 8 , a control method of a touch display panel according to a preferred embodiment of the present invention includes steps W11 to W13 . The control method of the touch display panel can be applied to the touch display panel 1 of the first embodiment or the touch display panel of the second embodiment.

In step W11, the second light sensing component changes the external light source to cause the touch unit to output a touch signal. In step W12, the reading unit outputs an inductive output value according to the touch signal. In step W13, a position determining circuit determines a touch position according to the sensing output value.

The detailed control method has been described in detail in the above embodiments, and thus will not be further described herein. In addition, in the present embodiment, the control method of the touch display device is the same as the control method of the above-described transistor substrate, and details are not described herein again.

In summary, the touch display panel, the touch display device, and the control method thereof according to the present invention are shielded by a light shielding layer to make the first light sensing element a reference light. Sensing component, and sensing an external light source by the second light sensing component, when the user directly touches the touch display device with a finger or a stylus, the second light sensing component senses different The brightness of the external light source enables the touch display device to output the touch signal accurately according to the change of the external light source, so that the position of the user touch can be known by the position determining circuit of the back end.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

1, 7. . . Touch display panel

2. . . First substrate

twenty one. . . Shading layer

twenty two. . . Color filter layer

twenty three. . . The protective layer

3, 3’. . . Second substrate

311, 511. . . Touch unit

312, 512. . . Reading unit

313, 513. . . Pixel unit

314, 514. . . First light sensing element

315, 515. . . Second light sensing element

316, 516. . . Read switch

317, 517. . . Operational Amplifier

318, 518. . . resistance

319, 519. . . Pixel switch

32. . . Data drive circuit

33. . . Scan drive circuit

34. . . Position judgment circuit

4. . . Liquid crystal layer

6. . . Backlight module

61. . . light source

62. . . Diffuser

63. . . Optical film set

64. . . Backplane

8. . . Touch display device

A ₁₁ , A ₂₁ . . . Touch signal

B ₁₁ , B ₁₂ , B ₂₁ , B ₃₁ . . . Bias line

C ₁₁ , C ₂₁ . . . Pixel equivalent capacitance

C _LC1 , C _LC2 . . . Liquid crystal capacitor

C _ST1 , C _ST2 . . . Storage capacitor

D ₁₁ to D _1n , D ₂₁ to D _2n . . . Data line

L1. . . Light

R ₁₁ to R _1n and R ₂₁ to R _2n . . . Read line

S ₁₁ to S _1m and S ₂₁ to S _2m . . . Scanning line

T ₁₁ , T ₁₂ , T ₁₃ , T ₁₄ , T ₂₁ , T ₂₂ , T ₂₃ , T ₂₄ . . . Transistor

V _REF . . . Reference signal

W11～W13. . . Control method steps

1 is a schematic view of a touch display panel according to a first embodiment of the present invention;

2 is a schematic circuit diagram of a second substrate of FIG. 1;

3 is a schematic diagram of the touch unit, the reading unit, and the pixel unit of FIG. 2;

4 is a schematic circuit diagram of a second substrate according to a second embodiment of the present invention;

5 is a schematic diagram of the touch unit, the reading unit, and the pixel unit of FIG. 4;

6 is a timing diagram of the signal level of the scan line and the bias line in FIG. 4 and FIG. 5;

FIG. 7 is a schematic diagram of a touch display device according to a preferred embodiment of the present invention;

FIG. 8 is a flow chart showing the steps of a method for controlling a touch display panel according to a preferred embodiment of the present invention.

311. . . Touch unit

312. . . Reading unit

313. . . Pixel unit

314. . . First light sensing element

315. . . Second light sensing element

316. . . Read switch

317. . . Operational Amplifier

318. . . resistance

319. . . Pixel switch

A ₁₁ . . . Touch signal

B ₁₁ , B ₁₂ . . . Bias line

C ₁₁ . . . Pixel equivalent capacitance

C _LC1 . . . Liquid crystal capacitor

C _ST1 . . . Storage capacitor

D ₁₁ . . . Data line

R ₁₁ . . . Read line

S ₁₁ . . . Scanning line

V _REF . . . Reference signal

T ₁₁ , T ₁₂ , T ₁₃ , T ₁₄ . . . Transistor

Claims (40)

A touch display panel includes: a first substrate having a light shielding layer; and a second substrate disposed opposite the first substrate and having: a touch unit having: a first light sensing element And electrically connected to a first bias line and opposite to the portion of the light shielding layer; and a second light sensing element electrically connected to the first light sensing element and a second bias line, The second light sensing component outputs a touch signal according to an external light source, and a reading unit is electrically connected to the touch unit, and outputs an inductive output according to the touch signal. value. The touch display panel of claim 1, wherein a portion of the light shielding layer overlaps the first light sensing element in a projection direction. The touch display panel of claim 1, wherein the first light sensing element and the second light sensing element are each a photoelectric crystal. The touch display panel of claim 3, wherein one of the control ends of the first light sensing component is electrically connected to a first end or a second end thereof. The touch display panel of claim 3, wherein one of the control ends of the second light sensing component is electrically connected to a first end or a second end thereof. The touch display panel of claim 1, wherein the reading unit has: a read switch electrically connected to the touch unit; and an operational amplifier, wherein a positive input receives a reference signal And a resistor electrically connected to one of the negative input terminal and the one output terminal of the operational amplifier. The touch display panel of claim 1, wherein the second substrate further comprises: a pixel unit adjacent to the touch unit and having a pixel switch and a pixel equivalent capacitance The pixel switch is electrically connected to a scan line, a data line, and the pixel equivalent capacitance. The touch display panel of claim 1, further comprising: a position determining circuit electrically connected to the reading unit and determining a touch position according to the sensing output value. A touch display panel includes: a first substrate having a light shielding layer; and a second substrate disposed opposite the first substrate and having: a touch unit having: a first light sensing element The second light sensing component is electrically connected to the first light sensing component and a bias line, wherein the second light sensing component changes according to an external light source. The touch unit outputs a touch signal; and a reading unit is electrically connected to the touch unit, and outputs an inductive output value according to the touch signal. The touch display panel of claim 9, wherein a portion of the light shielding layer overlaps the first light sensing element in a projection direction. The touch display panel of claim 9, wherein the first light sensing element and the second light sensing element are each a photoelectric crystal. The touch display panel of claim 11, wherein one of the control ends of the first light sensing component is electrically connected to a first end or a second end thereof. The touch display panel of claim 11, wherein one of the control ends of the second light sensing component is electrically connected to a first end or a second end thereof. The touch display panel of claim 9, wherein the reading unit has: a read switch electrically connected to the touch unit; and an operational amplifier, wherein a positive input receives a reference signal a negative input terminal is electrically connected to the first photo sensing element and the second photo sensing element; and a resistor is electrically connected to one of the negative input terminal and the output end of the operational amplifier. The touch display panel of claim 9, wherein the second substrate further comprises: a pixel unit adjacent to the touch unit and having a pixel switch and a pixel equivalent capacitance The pixel switch is electrically connected to a scan line, a data line, and the pixel equivalent capacitance. The touch display panel of claim 9, further comprising: a position determining circuit electrically connected to the reading unit and determining a touch position according to the sensing output value. A touch display device includes: a backlight module; and a touch display panel disposed opposite to the backlight module, and having: a first substrate having a light shielding layer; and a second substrate; The first substrate is oppositely disposed, and has a touch unit and a reading unit. The touch unit has a first light sensing component and a second light sensing component, and the first light sensing component and the first component The second light sensing element is electrically connected to the first light sensing component and a second bias line, wherein the second light sensing device is electrically connected to the second light sensing component. The component is configured to output a touch signal according to an external light source, and the reading unit is electrically connected to the touch unit, and outputs an inductive output value according to the touch signal. The touch display device of claim 17, wherein a portion of the light shielding layer and the first light sensing element overlap in a projection direction. The touch display device of claim 17, wherein the first light sensing element and the second light sensing element are each a photoelectric crystal. The touch display device of claim 19, wherein one of the control ends of the first light sensing element is electrically connected to a first end or a second end thereof. The touch display device of claim 19, wherein one of the control ends of the second light sensing element is electrically connected to a first end or a second end thereof. The touch display device of claim 17, wherein the reading unit has: a read switch electrically connected to the touch unit; and an operational amplifier, wherein a positive input receives a reference signal And a resistor disposed between one of the negative input terminals and one of the output terminals of the operational amplifier. The touch display device of claim 17, wherein the second substrate further comprises: a pixel unit adjacent to the touch unit and having a pixel switch and a pixel equivalent capacitance The pixel switch is electrically connected to a scan line, a data line, and the pixel equivalent capacitance. The touch display device of claim 17, wherein the touch display panel further comprises: a position determining circuit electrically connected to the reading unit, and determining a touch according to the sensing output value position. A touch display device includes: a backlight module; and a touch display panel disposed opposite to the backlight module, and having: a first substrate having a light shielding layer; and a second substrate; The first substrate is oppositely disposed, and has a touch unit and a reading unit. The touch unit has a first light sensing component and a second light sensing component, and the first light sensing component and the portion The second light sensing component is electrically connected to the first light sensing component and a bias line, wherein the second light sensing component changes the external light source to cause the touch component to output The touch unit is electrically connected to the touch unit, and outputs an inductive output value according to the touch signal. The touch display device of claim 25, wherein a portion of the light shielding layer and the first light sensing element overlap in a projection direction. The touch display device of claim 25, wherein the first light sensing element and the second light sensing element are each a photoelectric crystal. The touch display device of claim 27, wherein one of the control ends of the first light sensing element is electrically connected to a first end or a second end thereof. The touch display device of claim 27, wherein one of the control ends of the second light sensing element is electrically connected to a first end or a second end thereof. The touch display device of claim 25, wherein the reading unit has: a read switch electrically connected to the touch unit; and an operational amplifier, wherein a positive input receives a reference signal a negative input terminal is electrically connected to the first photo sensing element and the second photo sensing element; and a resistor is disposed between the negative input terminal and the output end of the operational amplifier. The touch display device of claim 25, wherein the second substrate further comprises: a pixel unit adjacent to the touch unit, and having a pixel switch and a pixel equivalent capacitance The pixel switch is electrically connected to a scan line, a data line, and the pixel equivalent capacitance. The touch display device of claim 25, wherein the touch display panel further comprises: a position determining circuit electrically connected to the reading unit, and determining a touch according to the sensing output value position. A touch display panel having a first substrate and a second substrate, the first substrate having a light shielding layer, the second substrate being disposed opposite to the first substrate, and having a touch unit and a reading unit, the touch unit has a first light sensing element and a second light sensing element, the first light sensing element is electrically connected to a first bias line, and The second light sensing component is electrically connected to the first light sensing component and a second bias line, and the reading unit is electrically connected to the touch component, and the control is electrically connected. The method includes the following steps: the second light sensing component outputs a touch signal according to an external light source change, and the sensing unit outputs an inductive output value according to the touch signal. The control method according to claim 33, further comprising the step of: determining, by a position determining circuit, a touch position according to the sensing output value. A touch display panel having a first substrate and a second substrate, the first substrate having a light shielding layer, the second substrate being disposed opposite to the first substrate, and having a touch unit and a reading unit, the touch unit has a first light sensing component and a second light sensing component, the first light sensing component is disposed opposite to a portion of the light shielding layer, the second The light sensing component is electrically connected to the first light sensing component and a bias line, and the reading unit is electrically connected to the touch component, and the control method comprises the following steps: the second light sensing component is based on An external light source is changed, and the touch unit outputs a touch signal; and the reading unit outputs an inductive output value according to the touch signal. The control method according to claim 35, further comprising the step of: determining, by a position determining circuit, a touch position according to the sensing output value. A touch-sensitive display device has a backlight module and a touch-sensitive display panel. The touch-sensitive display panel is disposed opposite to the backlight module and has a first substrate and a second substrate, the first substrate has a light shielding layer, and the second substrate is disposed opposite to the first substrate, and has a touch unit and a reading unit, the touch unit has a first light sensing component and a second light sensing element electrically connected to a first bias line and opposite to a portion of the light shielding layer, the second light sensing element and the first light sensing The component and a second bias line are electrically connected, and the reading unit is electrically connected to the touch unit. The control method includes the following steps: the second light sensing component changes the external light source to make the touch The control unit outputs a touch signal; and the reading unit outputs an inductive output value according to the touch signal. The control method according to claim 37, further comprising the step of: determining, by a position determining circuit, a touch position according to the sensing output value. A touch-sensitive display device has a backlight module and a touch-sensitive display panel. The touch-sensitive display panel is disposed opposite to the backlight module and has a first substrate and a second substrate, the first substrate has a light shielding layer, the second substrate is opposite to the first substrate, and has a touch unit and a reading unit, the touch unit has a first light sensing element And a second light sensing component, the first light sensing component is opposite to the portion of the light shielding layer, and the second light sensing component is electrically connected to the first light sensing component and a bias line. The reading unit is electrically connected to the touch unit, and the control method includes the following steps: the second light sensing component outputs a touch signal according to an external light source change; and the reading is performed by the touch unit; The unit outputs an inductive output value according to the touch signal. The control method according to claim 39, further comprising the step of: determining, by a position determining circuit, a touch position according to the sensing output value.