CN112905053A - Touch control display panel - Google Patents
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- CN112905053A CN112905053A CN202110248916.9A CN202110248916A CN112905053A CN 112905053 A CN112905053 A CN 112905053A CN 202110248916 A CN202110248916 A CN 202110248916A CN 112905053 A CN112905053 A CN 112905053A
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- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
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Abstract
Disclosed is a touch display panel, which comprises a display driver, a light-operated sensor and a touch sensor, wherein a frame display period of the touch display panel comprises a first time period and a second time period, the display driver and the light-operated sensor work simultaneously in the first time period, and the touch sensor works in the second time period. The display function and the light control function work synchronously, and the display function, the light control function and the touch frame time-sharing driving scheme are adopted, so that touch control, display and light control can be effectively separated, and the problems of crosstalk of a common electrode to a touch signal, crosstalk of a touch transmitting electrode to a read-out line and crosstalk of a touch electric field to liquid crystal can be effectively solved.
Description
Technical Field
The invention relates to the technical field of touch display, in particular to a touch display panel.
Background
With the development of display technology, more and more functions are integrated in the display device, and new functions are synchronously given to the display device. The display device is used as an important interface of human-computer interaction, and the sensor is integrated in the display device and is an important bridge of human-computer interaction, wherein the human-computer interaction is required to be sensed. In some special use environments, a large-size display liquid crystal screen needs to meet the requirements of both the function of realizing remote control and the function of realizing short-range control, so that the touch control or light control display technology with single function is not enough.
In order to reduce the manufacturing cost and the thickness, the light control sensor and the touch sensor are generally synchronously integrated into a liquid crystal display (in-cell), but parasitic capacitance exists between an electrode of the light control sensor and a receiving electrode of the touch sensor, and electric field crosstalk among the light control sensor, a pixel electrode and liquid crystal restricts the application of a large-size liquid crystal display screen integrating light control and touch functions.
Therefore, the existing large-size liquid crystal display screen for synchronously realizing the light control and touch control functions is to be improved.
Disclosure of Invention
The embodiment of the invention provides a touch display panel, which aims to solve the technical problems that in the existing touch display panel, a light control sensor and a touch sensor are in-cell structures, so that parasitic capacitance exists between an electrode of the light control sensor and a receiving electrode of the touch sensor, electric fields among the light control sensor, a pixel electrode and liquid crystal are mutually interfered, and display is further influenced.
In order to solve the above problems, the technical scheme provided by the invention is as follows:
the embodiment of the invention provides a touch display panel, which comprises a display driver, a light control sensor and a touch sensor, wherein the display driver is used for realizing display, the light control sensor is used for realizing optical touch, and the touch sensor is used for realizing capacitive touch; the display driver and the light control sensor work simultaneously in the first time period, and the touch sensor works in the second time period.
In an embodiment of the invention, the touch display panel further includes a plurality of scan lines, and the photo sensor and the display driver are electrically connected to the same scan line.
In an embodiment of the invention, the photo sensor includes an output transistor and a photo transistor electrically connected to each other, wherein a gate of the output transistor is electrically connected to the scan line.
In an embodiment of the invention, the display driver includes a switching transistor, and a gate of the switching transistor is electrically connected to the scan line.
In an embodiment of the present invention, the touch display panel further includes:
a first substrate;
a second substrate disposed opposite to the first substrate;
the pixel electrode is arranged on one side, facing the second substrate, of the first substrate; and
and the multiplexing electrode is arranged on one side of the second substrate facing the first substrate and comprises a plurality of first electrode blocks.
In an embodiment of the invention, the display driver and the light control sensor are disposed on the first substrate in the same layer.
In one embodiment of the present invention, the touch sensor includes:
the first touch electrode is arranged on one side, facing the first substrate, of the second substrate;
the first touch electrode is arranged on one side, away from the first substrate, of the second substrate; in the first time period, each first electrode block is reused as a common electrode, and in the second time period, at least part of the first electrode blocks are reused as the first touch electrode.
In an embodiment of the invention, the first electrode blocks in odd-numbered rows or even-numbered rows are reused as the first touch electrodes.
In an embodiment of the disclosure, the first touch electrode includes a plurality of second electrode blocks and second bridging lines, which are arranged in an array, and the second bridging lines connect two adjacent second electrode blocks in the same column.
In an embodiment of the invention, there is no overlapping surface between the second electrode block and the first electrode block multiplexed as the first touch electrode.
The invention has the beneficial effects that: the embodiment of the invention adopts a driving scheme that the display function and the light control function work synchronously, and the display function, the light control function and the touch frame are time-shared, so that touch control, display and light control can be effectively separated, and the problems of crosstalk of a common electrode to a touch signal, crosstalk of a touch transmitting electrode to a read-out line and crosstalk of a touch electric field to liquid crystal can be effectively solved; in addition, the common electrode is reused as a touch emitting electrode, and the light-operated sensor is integrated in the film layer of the display driver, so that the thickness of the touch display panel can be reduced, and the process cost is saved.
Drawings
Fig. 1 is a schematic structural diagram of a touch display panel according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an integrated circuit of a light control sensor and a display driver according to an embodiment of the present invention;
fig. 3 is a timing diagram of an integrated display of a photo sensor and a touch sensor according to an embodiment of the present invention;
fig. 4 is a schematic plan view of a second touch electrode according to an embodiment of the invention;
FIG. 5 is a schematic plan view of a multiplexing electrode according to an embodiment of the present invention;
fig. 6 is a schematic plan view of a first touch electrode and a second touch electrode according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
The invention provides the embodiment to solve the technical problems that the display is influenced by parasitic capacitance between an electrode of the light control sensor and a receiving electrode of the touch control sensor and mutual crosstalk of electric fields between the light control sensor, a pixel electrode and liquid crystal due to the fact that the light control sensor and the touch control sensor are in-cell structures in the existing touch control display panel.
Referring to fig. 1, an embodiment of the invention provides a touch display panel 100, which includes a display driver, a light control sensor and a touch sensor, where the display driver is used for implementing display, the light control sensor is used for implementing optical touch, and the touch sensor is used for implementing capacitive touch.
The light control sensor can be used for remote touch control, and the touch sensor can be used for near touch control, so that multifunctional touch control display is realized.
Specifically, the photo sensor includes an output transistor T2 and a photo transistor T3 electrically connected, wherein the photo transistor T3 is configured to sense a change in luminous flux, generate a photo current according to the sensed luminous flux, and the photo current flows from a source to a drain of the sensing transistor T3 via a channel, and charges generated by the photo current are output to the detection IC through the output transistor T2. Whether or not to perform a touch is determined based on the value of the photocurrent. The photo sensor includes, but is not limited to, any one of a 2T1C (two thin film transistors and 1 storage capacitor) architecture, a 4T1C architecture, and a 5T1C architecture. In this embodiment, a 2T1C structure will be described as an example.
The touch sensor can be in a mutual capacitance touch mode and comprises a transmitting electrode and a touch electrode.
The touch display panel 100 further includes a first substrate 10 and a light emitting layer disposed on the first substrate 10, the display driver is configured to drive the light emitting layer to emit light to realize display, and the light emitting layer includes, but is not limited to, any one of a liquid crystal material, an OLED (organic light emitting diode), a QLED (quantum dot light emitting diode), a Mini-led, and a Micro-led.
In this embodiment, the photo sensor may be in-cell structure, i.e. integrated inside the light emitting layer. Compared with the externally-hung structure, the overall thickness of the touch display panel 100 can be reduced.
Specifically, the light control sensor is disposed on the first substrate 10 and between the first substrate 10 and the light emitting layer.
Further, the light control sensor may be disposed on the first substrate 10 in the same layer as the display driver, that is, each metal device of the thin film transistor of the light control sensor and each metal device of the thin film transistor of the display driver may be formed by the same metal layer.
Because the light-operated sensor and the touch sensor are synchronously integrated in the display layer in the prior art, parasitic capacitance exists between the electrode of the light-operated sensor and the electrode of the touch sensor, and electric fields among the sensors are mutually interfered, one of the transmitting electrode and the receiving electrode of the touch sensor is set to be an external hanging structure (arranged outside the light-emitting layer) and the other is set to be an in-cell structure (arranged in the light-emitting layer), so that the influence of the electrode of the touch sensor on the interference of other sensors is reduced, and compared with a pure external hanging structure (the transmitting electrode and the receiving electrode are both arranged outside the light-emitting layer), the touch sensor has lower cost and thinner thickness.
A frame display period of the touch display panel may include a first time period during which the display driver operates with the light control sensor and a second time period; and in the second time period, the touch sensor works. By carrying out frame time-sharing work on the touch sensor, the display driver and the light-operated sensor, the problems that the common electrode of the display driver interferes with a touch signal and the electrode of the light-operated sensor and the touch electrode generate parasitic capacitance can be solved.
The touch display panel further comprises a plurality of scanning lines, and the light-operated touch sensor and the display driver are electrically connected to the same scanning line, so that synchronous work of display and light control is realized, and the refresh rate and the report rate of display and light control are improved.
The light-operated sensor comprises an output transistor and a light-sensitive transistor which are electrically connected, and the grid electrode of the output transistor is electrically connected to the scanning line; the display driver comprises a switch transistor, and the grid electrode of the switch transistor is electrically connected to the scanning line.
Referring to fig. 1 and fig. 2, the embodiment of the invention is described by taking a liquid crystal display panel as an example, but not limited thereto. The touch display panel 100 includes a first substrate 10 and a second substrate 60 disposed opposite to each other, the display driver 101 and the light control sensor 102 are disposed on the first substrate 10, and the touch sensor is disposed on the second substrate 60.
The touch display panel 100 further includes a liquid crystal layer 50 sandwiched between the first substrate 10 and the second substrate 60, a pixel electrode 30 disposed on a side of the first substrate 10 facing the second substrate 60, and a multiplexing electrode disposed on a side of the second substrate 60 facing the first substrate 10.
The pixel electrode 30 is disposed on the display driver 101 and the photo sensor 102, and the pixel electrode 30 is electrically connected to the switching transistor T1 of the display driver 101.
The touch sensor is a mutual capacitance touch structure, and the touch sensor includes a first touch electrode 92 and a second touch electrode 110, wherein the first touch electrode 92 is one of a transmitting electrode Tx and a receiving electrode Rx, and the second touch electrode 110 is the other of the transmitting electrode Tx and the receiving electrode Rx. In the present embodiment, the first touch electrode 92 is a transmitting electrode Tx, and the second touch electrode 110 is a receiving electrode Rx, but not limited thereto.
The first touch electrode 92 may be disposed on a side of the second substrate 60 facing the first substrate 10, and the second touch electrode 110 may be disposed on a side of the second substrate 60 facing away from the first substrate 10.
The multiplexing electrodes are used as electrodes with different functions at different time periods, so that the process cost can be reduced and the thickness of the touch display panel 100 can be reduced. When the multiplexing electrode is used as a common electrode in a display stage, the common electrode and the pixel electrode 30 form a liquid crystal capacitor, and at least one part of the multiplexing electrode is used as an emitting electrode or a receiving electrode of a touch driver in a touch stage, so that the interference of the common electrode to a touch signal can be effectively solved, and the improvement on the VA type display panel is more obvious.
In the present embodiment, the photo sensor 102 may have a 2T1C structure, and the photo sensor 102 includes an output transistor T2, a photo transistor T3, and a storage capacitor Cst. In other embodiments, the photo sensor 102 may be 3T1C, 4T1C, or 5T 1C.
Referring to fig. 2, the touch display panel 100 further includes a plurality of scan lines Gate and a plurality of Data lines Data, and the scan lines Gate and the Data lines Data are staggered with each other to define a plurality of pixel regions. The display driver 101 is disposed at an intersection of the scan line Gate and the data line Date.
The photo sensor 102 and the display driver 101 are electrically connected to the same scan line Gate, so that the photo sensor 102 and the display driver 101 can scan synchronously.
Specifically, the gate of the output transistor is electrically connected to the scan line, and the display driver includes a switching transistor, the gate of which is electrically connected to the scan line.
The Gate of the switching transistor T1 is electrically connected to the corresponding scan line Gate, the source or drain of the switching transistor T1 is connected to the Data line Data, and the drain or source of the switching transistor T2 is connected to the pixel electrode 30.
The touch display panel 100 further includes a first power line SVDD, a second power line SVGG, and a Readout line Readout.
Wherein a Gate of the output transistor T2 is connected to a scan line Gate, a source or a drain of the output transistor T2 is connected to a node a, a drain or a source of the output transistor T2 is connected to the read line Readout, a Gate of the light sense transistor T3 is connected to a second power supply line SVGG, a source of the light sense transistor T3 is connected to the first power supply line SVDD, a drain of the light sense transistor T3 is connected to the node a, one end of the storage capacitor Cst is connected to the node a, and the other end of the storage capacitor Cst is connected to the second power supply line SVGG. The Readout line Readout may be externally connected to a detection unit IC of the touch display panel 100 for detecting a detection position, and voltages of the first power line SVDD and the second power line SVGG are fixed voltages.
The driving principle of the photo sensor 102 is as follows: when a certain amount of light is sensed in the active layer of the photo transistor T3 by applying a driving voltage to the source of the photo transistor T3 through the first power line SVDD and applying a fixed voltage to the gate of the photo transistor T3 through the second power line SVGG, a photocurrent is generated according to the sensed amount of light and flows from the source to the drain of the sense transistor T3 via the channel. The photocurrent flows to the storage capacitor Cst through the drain of the photo transistor T3. Accordingly, the charges generated by the photocurrent are accumulated in the storage capacitor Cst through the first source line SVDD and the second power supply line SVGG. The charge accumulated in the storage capacitor Cst flows to the Readout line Readout through the source or drain of the output transistor T2 to be detected by the detection cell IC connected to the Readout line Readout, and whether or not light control is performed is determined based on the value of the photocurrent.
Referring to fig. 3, gate (n) represents the nth row of scan lines, and Tx n represents the nth row of emitter electrodes. The light control and the display of the embodiment of the present invention are performed simultaneously, and the light control and the display are performed together with the touch at different times, so that the crosstalk of the liquid crystal can be prevented from being affected by the touch electric field, the crosstalk of the transmitting electrode Tx (the first touch electrode in the embodiment) is prevented from being affected by the read line Readout of the light control sensor 102, and the crosstalk of the transmitting electrode Tx is prevented from being affected by the common electrode on the second substrate 60 side and the electrode of the light control sensor 102.
Specifically, the time T for completing the display, the light control and the touch within one frame is T1+ T2, and the corresponding frequency is f 1/(T1+ T2), in the first time period T1, the plurality of scan lines Gate1 to Gate (n) on the touch display panel 100 scan line by line, the light control and the display complete the scanning of one frame, and the operating time of the display driver 101 and the light control sensor 102 in one frame period is T1; in the second time period t2, the touch sensor operates, the transmitting electrodes Tx1 to Txn transmit touch driving signals line by line, the light control sensor 102 and the display driver 101 stop operating, and the operating time of the touch sensor in one frame period is t 2.
Referring to fig. 1, each device of the display driver 101 and each device of the photo sensor 102 may be disposed in the same layer, so as to save the process cost and reduce the thickness of the touch display panel 100.
Specifically, the switching transistor T1 of the display driver 101 includes a first gate electrode 111, a first active layer 121, a first source electrode 131, and a first drain electrode 132. In other embodiments, the display driver 101 may be a driving structure of 3T1C, 5T1C, or 7T1C, for example, in an OLED touch display panel or other active light emitting display panel, the display driver 101 may include a switch transistor T1, a driving transistor, a reset transistor, etc.
The output transistor T2 of the optical driver 102 includes a second gate 112, a second active layer 122, a second source 133, and a second drain 134; the photo transistor T3 includes a third gate electrode 113, a third active layer 123, a third source electrode 135, and a third drain electrode 136.
The first gate 111, the second gate 112, and the third gate 113 are disposed in the same layer, and a patterned gate pattern may be formed by depositing a first metal layer on the first substrate 10 and performing the same etching process.
The first active layer 121, the second active layer 122, and the third active layer 123 are disposed in the same layer, and materials of the respective active layers include, but are not limited to, a-Si: h, Ge or Si-Ge, and forming the pattern of each active layer by coating the semiconductor material and etching.
The first source 131, the first drain 132, the second source 133, the second drain 134, the third source 135, and the third drain 136 are disposed in the same layer, and patterned source and drain patterns are formed by depositing a second metal layer above each active layer and performing the same etching process on the second metal layer.
The first gate 111, the second gate 112, and the third gate 113 are covered with a gate insulating layer 21, the first active layer 121, the second active layer 122, and the third active layer 123 are disposed on the gate insulating layer 21, the first source 131 and the first drain 132 are overlapped at two ends of the first active layer 121, the second source 133 and the second drain 134 are overlapped at two ends of the second active layer 122, and the third source 135 and the third drain 136 are overlapped at two ends of the third active layer 123, wherein the second drain 134 is connected to the third source 135.
A passivation layer 22 is disposed on the first source electrode 131, the first drain electrode 132, the second source electrode 133, the second drain electrode 134, the third source electrode 135, and the third drain electrode 136, the pixel electrode 30 is disposed on the passivation layer 22, a via hole is disposed on the passivation layer 22, and the pixel electrode 30 is connected to the first drain electrode 132 through the via hole.
The touch display panel 100 may be a COA (Color filter on array, where Color filters are integrated on an array substrate) structure, or may be a Non-COA structure. When the touch display panel 100 is of a COA type structure, a color filter layer may be disposed on the first substrate 10, specifically, between the display driver 101 and the pixel electrode 30. When the touch display panel 100 is of a Non-COA structure, the color filter layer may be disposed on the second substrate 60, and specifically, may be disposed on a side of the second substrate 60 facing the first substrate 10.
In this embodiment, a Non-COA type structure is taken as an example, the color filter layer 70 is disposed on one side of the second substrate 60 facing the first substrate 10, the color filter layer 70 includes a plurality of first color resistors 71, second color resistors 72, and third color resistors 73 which are distributed in an array and have different colors, a black matrix 80 is disposed between adjacent color resistors, and the multiplexing electrode is disposed on the black matrix 80. The black matrix 80 and the color filter layer 70 should avoid the channel of the photo transistor T3 (the portion of the third active layer 123 between the third source electrode 135 and the third drain electrode 136) to avoid the influence of the filtering effect of the black matrix 80 and the color resistor on the received light flux of the photo transistor T3. That is, the black matrix 80 and the color filter layer 70 do not have an overlapping surface with the channel of the photo transistor T3.
The light sensing wave band of the light sensing sensor is a visible light wave band (380-780 nanometers) or an infrared light wave band (780-1000 nanometers).
Referring to fig. 1 and 5, the multiplexing electrode 90 is disposed on a side of the black matrix 80 facing the first substrate 10, and includes a plurality of first electrode blocks 91 and a plurality of first bridging lines 93, where the first bridging lines 93 connect two adjacent first electrode blocks 91 in the same row X.
In one embodiment, each of the first electrode blocks 91 of the multiplexing electrodes 90 is multiplexed as a common electrode.
In one embodiment, a part of the first electrode blocks 91 of the multiplexing electrodes 90 are multiplexed as the first touch electrodes 92. Specifically, the first electrode blocks 91 in odd or even rows are reused as the first touch electrodes 92. In this embodiment, the area of the electrode block of the row where the first touch electrode 92 is located is larger than the area of the electrode block of the adjacent row.
The shape of the electrode block 91 includes any one of a diamond shape, a square shape, a round shape, and the like, and in this embodiment, the electrode block 91 is a diamond shape.
The distance between the adjacent electrode blocks 91 can be 2-10 micrometers, and short circuit is easily caused when the distance is too small.
The material of the pixel electrode 30 and the multiplexing electrode 90 can be a transparent conductive material, such as an ITO material.
Referring to fig. 1 and 4, the second touch electrode 110 is disposed on a side of the second substrate 60 away from the first substrate 10, the second touch electrode 110 includes a plurality of second electrode blocks 111 and a plurality of second bridging lines 112, and the second bridging lines 112 connect two adjacent second electrode blocks 111 in the same row Y.
Referring to fig. 6, the second touch electrode 110 and the first electrode block 91 multiplexed as the first touch electrode 92 do not have an overlapping surface, that is, in the thickness direction, the orthogonal projection of the second electrode 110 on the multiplexed electrode 90 does not overlap with the first electrode block 91 multiplexed as the first touch electrode 92.
The material of the second touch electrode 110 includes, but is not limited to, ITO, transparent conductive polymer PEDOT, metal nanowires, graphene, carbon nanotubes, and one or more of metals such as Cu, Al, Au, Pt, Ag, Mo, and the like.
Referring to fig. 1, the touch display panel 100 further includes a first alignment layer 41 and a second alignment layer 42, the first alignment layer 41 is disposed on a side of the first pixel electrode 30 facing the second substrate 60, the second alignment layer 42 is disposed on a side of the multiplexing electrode 90 facing the second substrate, and liquid crystal is filled between the first alignment layer 41 and the second alignment layer 42.
The touch display panel 100 further includes an upper polarizer 130 and a lower polarizer (not shown), the upper polarizer 130 is disposed on a side of the second touch electrode 110 away from the first substrate 10, and the lower polarizer is disposed on a side of the first substrate 10 away from the second substrate 60. The upper polarizer 130 and the second touch electrode 110 are bonded through a transparent optical adhesive layer 120.
The embodiment of the invention adopts a driving scheme that the display function and the light control function work synchronously, and the display function, the light control function and the touch frame are time-shared, so that touch control, display and light control can be effectively separated, and the problems of crosstalk of a common electrode to a touch signal, crosstalk of a touch transmitting electrode to a read-out line and crosstalk of a touch electric field to liquid crystal can be effectively solved; in addition, the common electrode is reused as a touch emitting electrode, and the light-operated sensor is integrated in the film layer of the display driver, so that the thickness of the touch display panel can be reduced, and the process cost is saved.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The touch display panel provided by the embodiment of the present invention is described in detail above, and the principle and the implementation of the present invention are explained in detail herein by applying specific examples, and the description of the above embodiments is only used to help understanding the technical solution and the core idea of the present invention; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A touch display panel, comprising:
a display driver for implementing display;
the light control sensor is used for realizing optical touch control; and
the touch sensor is used for realizing capacitive touch; wherein the content of the first and second substances,
the one-frame display period of the touch display panel includes a first time period during which the display driver and the light control sensor operate simultaneously, and a second time period during which the touch sensor operates.
2. The touch display panel of claim 1, further comprising a plurality of scan lines, wherein the photo sensor and the display driver are electrically connected to the same scan line.
3. The touch display panel according to claim 2, wherein the photo sensor comprises an output transistor and a photo transistor electrically connected to each other, wherein a gate of the output transistor is electrically connected to the scan line.
4. The touch display panel according to claim 2, wherein the display driver comprises a switching transistor, and a gate of the switching transistor is electrically connected to the scan line.
5. The touch display panel according to claim 1, further comprising:
a first substrate;
a second substrate disposed opposite to the first substrate;
the pixel electrode is arranged on one side, facing the second substrate, of the first substrate; and
and the multiplexing electrode is arranged on one side of the second substrate facing the first substrate and comprises a plurality of first electrode blocks.
6. The touch display panel of claim 5, wherein the display driver and the light control sensor are disposed on the first substrate in the same layer.
7. The touch display panel according to claim 6, wherein the touch sensor comprises:
the first touch electrode is arranged on one side, facing the first substrate, of the second substrate;
the first touch electrode is arranged on one side, away from the first substrate, of the second substrate; in the first time period, each first electrode block is reused as a common electrode, and in the second time period, at least part of the first electrode blocks are reused as the first touch electrode.
8. The touch display panel according to claim 7, wherein the first electrode blocks of odd-numbered rows or even-numbered rows are multiplexed as the first touch electrodes.
9. The touch display panel according to claim 7, wherein the first touch electrode comprises a plurality of second electrode blocks and second bridging lines arranged in an array, and the second bridging lines connect two adjacent second electrode blocks in the same column.
10. The touch display panel according to claim 9, wherein the second electrode block does not have an overlapping surface with the first electrode block multiplexed as the first touch electrode.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113485048A (en) * | 2021-07-30 | 2021-10-08 | 深圳市华星光电半导体显示技术有限公司 | Display panel, display terminal and display driving method |
| CN114020167A (en) * | 2021-10-28 | 2022-02-08 | Tcl华星光电技术有限公司 | Touch display panel and display device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103996376A (en) * | 2014-05-14 | 2014-08-20 | 京东方科技集团股份有限公司 | Pixel driving circuit and method, array substrate and display device |
| CN104200784A (en) * | 2014-07-24 | 2014-12-10 | 京东方科技集团股份有限公司 | Pixel driving circuit and method, array substrate and transflective display device |
| CN104835454A (en) * | 2015-06-01 | 2015-08-12 | 京东方科技集团股份有限公司 | Organic electroluminescence touch control panel, driving method thereof and display device |
| CN105096841A (en) * | 2015-08-18 | 2015-11-25 | 京东方科技集团股份有限公司 | Electrophoresis display device and driving method thereof |
| CN107995959A (en) * | 2017-05-24 | 2018-05-04 | 昆山龙腾光电有限公司 | Visual angle changeable touch-control display panel and touch control display apparatus |
| CN111176486A (en) * | 2019-12-30 | 2020-05-19 | 厦门天马微电子有限公司 | Display panel, driving method thereof and display device |
| CN112214128A (en) * | 2020-10-09 | 2021-01-12 | 深圳市华星光电半导体显示技术有限公司 | Touch panel |
-
2021
- 2021-03-08 CN CN202110248916.9A patent/CN112905053B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103996376A (en) * | 2014-05-14 | 2014-08-20 | 京东方科技集团股份有限公司 | Pixel driving circuit and method, array substrate and display device |
| CN104200784A (en) * | 2014-07-24 | 2014-12-10 | 京东方科技集团股份有限公司 | Pixel driving circuit and method, array substrate and transflective display device |
| CN104835454A (en) * | 2015-06-01 | 2015-08-12 | 京东方科技集团股份有限公司 | Organic electroluminescence touch control panel, driving method thereof and display device |
| CN105096841A (en) * | 2015-08-18 | 2015-11-25 | 京东方科技集团股份有限公司 | Electrophoresis display device and driving method thereof |
| CN107995959A (en) * | 2017-05-24 | 2018-05-04 | 昆山龙腾光电有限公司 | Visual angle changeable touch-control display panel and touch control display apparatus |
| CN111176486A (en) * | 2019-12-30 | 2020-05-19 | 厦门天马微电子有限公司 | Display panel, driving method thereof and display device |
| CN112214128A (en) * | 2020-10-09 | 2021-01-12 | 深圳市华星光电半导体显示技术有限公司 | Touch panel |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113485048A (en) * | 2021-07-30 | 2021-10-08 | 深圳市华星光电半导体显示技术有限公司 | Display panel, display terminal and display driving method |
| CN113485048B (en) * | 2021-07-30 | 2023-10-31 | 深圳市华星光电半导体显示技术有限公司 | Display panel, display terminal and display driving method |
| CN114020167A (en) * | 2021-10-28 | 2022-02-08 | Tcl华星光电技术有限公司 | Touch display panel and display device |
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|---|---|
| CN112905053B (en) | 2024-02-06 |
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