CN109782959B - Touch display screen, driving method and display device - Google Patents
Touch display screen, driving method and display device Download PDFInfo
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- CN109782959B CN109782959B CN201910106844.7A CN201910106844A CN109782959B CN 109782959 B CN109782959 B CN 109782959B CN 201910106844 A CN201910106844 A CN 201910106844A CN 109782959 B CN109782959 B CN 109782959B
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Abstract
The invention discloses a touch display screen, a driving method and a display device. The touch control electrode is arranged on one side of the light-emitting device facing the substrate base plate, so that the touch control display screen can realize a touch control function through the touch control electrode.
Description
Technical Field
The invention relates to the technical field of display, in particular to a touch display screen, a driving method and a display device.
Background
With the rapid development of display technology, touch Screen panels (Touch Screen panels) have gradually come throughout the lives of people. At present, a touch screen with touch electrodes and a display screen are separately produced and then are attached together to form the display screen with a touch function, so that the defects of high manufacturing cost, low light transmittance, thick module and the like exist.
Disclosure of Invention
The embodiment of the invention provides a touch display screen, a driving method and a display device, which are used for combining a touch electrode with the display screen, so that the production cost is reduced, and the overall thickness of a module is reduced.
Therefore, the touch display screen provided by the embodiment of the invention comprises:
a substrate base plate;
a plurality of light emitting devices and a plurality of pixel circuits on the substrate; wherein the plurality of pixel circuits correspond to the plurality of light emitting devices one to one; each of the light emitting devices includes: a light emitting section, and a first electrode and a second electrode electrically connected to the light emitting section, respectively; in the same light emitting device, the first electrode and the second electrode are disposed on the same side of the light emitting portion at an interval;
the touch electrode layer is positioned on one side, facing the substrate base plate, of the plurality of light-emitting devices; the touch electrode layer comprises a plurality of mutually independent touch electrodes.
Optionally, in some embodiments provided by the present invention, the plurality of pixel circuits are located between the plurality of light emitting devices and the substrate base plate; the touch display screen further includes: second connection electrodes between the plurality of pixel circuits and the plurality of light emitting devices and first connection electrodes corresponding one-to-one to the respective light emitting devices;
the first electrode of each light emitting device is electrically connected with the corresponding pixel circuit through the corresponding first connecting electrode, and the second electrode of each light emitting device is electrically connected with the second connecting electrode;
at least one of the first connection electrode and the second connection electrode is located on the touch electrode layer.
Optionally, in some embodiments provided by the present invention, the touch electrode is reused as the second connection electrode.
Optionally, in some embodiments provided by the present invention, an orthographic projection of each of the touch electrodes on the substrate does not overlap with an orthographic projection of the first connection electrode and the second connection electrode on the substrate.
Optionally, in some embodiments provided by the present invention, an orthogonal projection of each touch electrode on the substrate does not overlap an orthogonal projection of each light emitting device on the substrate.
Optionally, in some embodiments provided by the present invention, each of the touch electrodes has a grid-like structure.
Optionally, in some embodiments provided by the present invention, the light emitting part includes: electroluminescent layers or LED chips.
Optionally, in some embodiments provided by the present invention, the size of the LED chip is micro-scale or nano-scale.
Optionally, in some embodiments provided by the present invention, the touch display screen further includes: electrode wires corresponding to the touch electrodes one to one and touch signal terminals corresponding to the touch electrodes one to one;
each touch electrode is electrically connected with the corresponding touch signal terminal through the corresponding electrode routing.
Correspondingly, the embodiment of the invention also provides a display device which comprises the touch display screen.
Correspondingly, an embodiment of the present invention further provides a driving method of the touch display screen, including:
in the display stage, the touch display screen is driven to display;
and in the touch control stage, a capacitance detection pulse signal is loaded on the touch control electrode, and the touch control position is determined by detecting the change of the capacitance value of the touch control electrode.
Optionally, in some embodiments provided by the present invention, the loading a capacitive detection pulse signal to the touch electrode specifically includes:
and simultaneously loading the same capacitance detection pulse signal to each touch electrode.
The invention has the following beneficial effects:
according to the touch display screen, the driving method and the display device provided by the embodiment of the invention, the plurality of light-emitting devices and the pixel circuits which correspond to the light-emitting devices one by one are arranged on the substrate, so that the light-emitting devices can be driven to emit light through the pixel circuits, and the display function is realized. The touch control electrode is arranged on one side, facing the substrate base plate, of the light-emitting device, and the touch control display screen can achieve a touch control function through the touch control electrode.
Drawings
Fig. 1 is a schematic top view of a touch display screen according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of the touch display screen shown in FIG. 1 along direction AA';
fig. 3 is a schematic structural diagram of a pixel circuit according to an embodiment of the invention;
FIG. 4 is a signal timing diagram corresponding to the pixel circuit shown in FIG. 3;
fig. 5 is a schematic top view of a touch electrode according to an embodiment of the present invention;
fig. 6 is a second schematic top view illustrating a touch display screen according to an embodiment of the invention;
FIG. 7 is a schematic cross-sectional view of the touch display screen shown in FIG. 6 along direction AA';
fig. 8 is a flowchart of a driving method of a touch display screen according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, specific embodiments of a touch display screen, a driving method and a display device provided by embodiments of the present invention are described in detail below with reference to the accompanying drawings. It should be understood that the preferred embodiments described below are only for illustrating and explaining the present invention and are not to be used for limiting the present invention. And the embodiments and features of the embodiments may be combined with each other without conflict. It should be noted that the film thicknesses and shapes of the respective layers in the drawings are not to be interpreted as true proportions, but are merely intended to illustrate the present invention. And the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.
An embodiment of the present invention provides a touch display screen, which is shown in fig. 1 and fig. 2, and may include: the liquid crystal display device includes a base substrate 100, a plurality of light emitting devices 110 and a plurality of pixel circuits 120 on the base substrate 100, and a touch electrode layer 130 on a side of the plurality of light emitting devices 110 facing the base substrate 100. The plurality of pixel circuits 120 correspond to the plurality of light emitting devices 110 one to one. Each of the light emitting devices 110 may include: a light-emitting portion 113, and a first electrode 111 and a second electrode 112 electrically connected to the light-emitting portion 113, respectively. In the same light emitting device 110, the first electrode 111 and the second electrode 112 are disposed on the same side of the light emitting portion 113 with an interval therebetween. The touch electrode layer 130 may include a plurality of touch electrodes 131 independent of each other.
According to the touch display screen provided by the embodiment of the invention, the plurality of light-emitting devices and the pixel circuits which correspond to the light-emitting devices one to one are arranged on the substrate base plate, so that the light-emitting devices can be driven to emit light through the pixel circuits, and the display function is realized. The touch control electrode is arranged on one side of the light-emitting device facing the substrate base plate, so that the touch control display screen can realize a touch control function through the touch control electrode.
The present invention will be described in detail with reference to specific examples. It should be noted that the present embodiment is for better explaining the present invention, but not limiting the present invention.
In some embodiments, the display area of the touch display screen may include a plurality of pixel units, and each pixel unit may include a plurality of sub-pixels. Each sub-pixel includes a light emitting device and a pixel circuit electrically connected to the light emitting device. The pixel circuit is used for driving the light-emitting device to emit light. In some embodiments provided by the present invention, as shown in fig. 3, the pixel circuit may include: a current control circuit 01 and a duration control circuit 02. Wherein, the current control circuit 01 may include: a driving transistor M01, first to fifth transistors M1 to M5, and a capacitor C1. According to the timing of the signals in the display stage shown in fig. 4, the current control circuit 01 can output the driving current after compensating the threshold voltage of the driving transistor M01 in the display stage. The duration control circuit 02 may include: a driving transistor M02, a sixth transistor M6, and a capacitor C2. According to the timing sequence of the signals in the display stage shown in fig. 4, the time length control circuit 02 can further control the gray-scale brightness corresponding to the light emitting device in the display stage by means of time integration. In practical applications, the structure of the pixel circuit may be substantially the same as the structure and the operation principle in the related art, and it should be understood by those skilled in the art that no detailed description is provided herein, and no limitation to the present invention is intended. Of course, the above description is only illustrative of the structure of the pixel circuit, and the structure of the pixel circuit may be another structure, which is not limited herein.
In some embodiments provided by the present invention, the light emitting part of the light emitting device may include: an electroluminescent layer. Specifically, the material of the electroluminescent layer may include: the electroluminescent material, such as an organic electroluminescent material and an inorganic electroluminescent material, is not limited herein.
In some embodiments provided by the present invention, the light emitting portion of the light emitting device may also include: an LED (Light Emitting Diode) chip. Specifically, the size of the LED chip may be in the order of micrometers. Further, a Micro Light Emitting Diode (Micro LED) has the advantages of high brightness, good Light Emitting efficiency, low power consumption, and the like. Alternatively, in some embodiments provided by the present invention, the size of the LED chip may be on the nanometer scale. Further, the Mini Light Emitting Diode (Mini LED) has a smaller size, and a high-resolution display screen can be realized. An Organic Light-Emitting Diode (OLED) and a pixel circuit for driving the OLED to emit Light are generally fabricated on a glass-based substrate to form an OLED panel. Among them, the pixel circuit is manufactured by using a Low Temperature Poly-silicon (LTPS) technology, which makes it difficult to implement a high resolution panel. In addition, since the OLED is configured in a stacked structure in which a light emitting layer is disposed between two electrodes, the light emitting layer needs to be prepared by an evaporation process, and the life of a light emitting material of the light emitting layer is short, which results in a low yield of products. Some embodiments of the invention, for example, use Micro LED chips and Mini LED chips to meet the requirements of high product specifications by transfer printing technology.
Generally with the embedded display screen inside of touch-control electrode, both can attenuate the holistic thickness of module, again can greatly reduced touch-sensitive screen's cost of manufacture. In some embodiments provided by the present invention, as shown in fig. 2, a plurality of pixel circuits 120 are positioned between the plurality of light emitting devices 110 and the substrate base plate 100. Wherein, the touch display screen can also include: second connection electrodes 142 positioned between the plurality of pixel circuits 120 and the plurality of light emitting devices 110, and first connection electrodes 141 one-to-one corresponding to the respective light emitting devices 110. The first connection electrode 141 and the second connection electrode 142 are disposed to be insulated from each other. The first electrode 111 of each light emitting device 110 is electrically connected to the corresponding pixel circuit 120 through the corresponding first connection electrode 141, and the second electrode 112 of each light emitting device 110 is electrically connected to the second connection electrode 142. At least one of the first connecting electrode and the second connecting electrode is positioned on the touch electrode layer. Fig. 2 is a diagram illustrating only the driving transistor M02 in the pixel circuit 120 as an example.
Specifically, the first connection electrode 141 may be located at the touch electrode layer 130. Thus, the first connection electrode 141 and the touch electrode 131 can be formed through a patterning process at one time, so that the manufacturing process can be simplified, and the production cost can be saved. Alternatively, the second connection electrode 142 may be located on the touch electrode layer 130. In this way, the second connection electrode 142 and the touch electrode 131 can be formed by one-time patterning process, so that the preparation process can be simplified, and the production cost can be saved. Further, as shown in fig. 2, the first connection electrode 141 and the second connection electrode 142 may be both located on the touch electrode layer 130. In this way, the first connection electrode 141, the second connection electrode 142, and the touch electrode 131 may be manufactured through a single patterning process, so that the manufacturing process may be simplified to the maximum extent, and the manufacturing cost may be saved. It should be noted that the patterning process may only include a photolithography process, or may include a photolithography process and an etching step, and may also include other processes for forming a predetermined pattern, such as printing, inkjet printing, etc.; the photolithography process is a process of forming a pattern by using a photoresist, a mask plate, an exposure machine, and the like, including processes of film formation, exposure, development, and the like. The corresponding patterning process may be selected according to the structure formed in the present invention.
In some embodiments provided by the present invention, the first electrode 111 can be a positive electrode, and the second electrode 112 can be a negative electrode. This allows the pixel circuit to output a driving current to the anode of the light emitting device L through the first connection electrode 141 by supplying a low level voltage signal VSS (e.g., a voltage of zero volts or a negative value) to the cathode of the light emitting device L through the second connection electrode 142 to drive the light emitting device L to emit light. The following description will be made by taking the driving transistor M02 in the pixel circuit as an example, as shown in fig. 2 and 3. The driving transistor M02 includes an active layer 121, a gate electrode 122, a conductive layer 123, a source electrode 124, and a drain electrode 125, which are sequentially disposed on one side of the substrate 100. A first insulating layer is arranged between the active layer 121 and the gate electrode 122, a second insulating layer is arranged between the gate electrode 122 and the conductive layer 123, an interlayer dielectric layer is arranged between the layer where the source electrode 124 and the drain electrode 125 are located and the conductive layer 123, and the source electrode 124 and the drain electrode 125 are electrically connected with the active layer 121 through via holes penetrating through the first insulating layer, the second insulating layer and the interlayer dielectric layer respectively. Further, the touch display screen further includes a planarization layer 150 on a side of the layer where the source electrode 124 and the drain electrode 125 are located, which is away from the substrate 100. The first and second connection electrodes 141 and 142 are located on a side of the planarization layer 150 facing away from the base substrate 100. The first connection electrode 141 is electrically connected to the drain electrode 125 of the driving transistor M02 through a via hole penetrating the planarization layer 150. Further, the touch display screen further includes a low-level signal trace 160 located on the layer where the source 124 and the drain 125 are located. The second connection electrode 142 is electrically connected to the low-level signal trace 160 through a via hole penetrating the planarization layer 150. Therefore, the manufacturing process sequence of the substrate of the touch display screen sequentially comprises the following steps: the manufacturing method of the LED chip comprises the steps of manufacturing an active layer, manufacturing a first insulating layer, manufacturing a grid electrode, manufacturing a second insulating layer, manufacturing a conducting layer, manufacturing an interlayer dielectric layer, manufacturing a source electrode and a drain electrode, manufacturing a planarization layer, manufacturing a first connecting electrode, a second connecting electrode and a touch electrode, manufacturing a protective layer, manufacturing a black matrix layer, and then transferring the LED chip to a substrate.
Further, in order to reduce reflection and improve the viewing effect, as shown in fig. 2, the touch display screen may further include: and the protective layer 170 and the black matrix layer 180 are sequentially positioned on the side of the layer where the first connecting electrode 141 and the second connecting electrode 142 are positioned, which is away from the base substrate 100. The protective layer 170 does not overlap with the orthographic projection of the black matrix layer 180 on the base substrate 100 and the orthographic projection of the respective first and second connection electrodes 141 and 142 on the base substrate 100, thereby exposing the first and second connection electrodes 141 and 142 to allow normal electrical connection with the first and second electrodes 111 and 112.
The common capacitive touch screen has attracted extensive attention by virtue of its unique touch principle, high sensitivity, long service life, high light transmittance and the like. The touch electrode provided by the embodiment of the invention can realize the function of capacitive touch. Furthermore, in the embodiment of the present invention, the touch electrode may be set as a self-capacitance electrode, so that the touch display screen realizes a capacitive touch function through a self-capacitance technology.
As shown in fig. 1 and 2, the orthographic projections of the touch electrodes 131 on the base substrate 100 are not overlapped with the orthographic projections of the first connection electrodes 141 and the second connection electrodes 142 on the base substrate 100. This allows the touch electrode 131 and the first and second connection electrodes 141 and 142 to be insulated from each other. Further, as shown in fig. 1 and 2, an orthogonal projection of each touch electrode 131 on the substrate 100 does not overlap an orthogonal projection of each light emitting device 110 on the substrate 100.
Generally, the touch density of the touch screen is usually in the millimeter level, and therefore, the density and the size of the touch electrode 131 can be selected according to the required touch density to ensure the required touch precision. For example, the size of the touch electrode 131 may be set to be between 4mm and 6 mm. Since the size of the LED chip is in the micron or nanometer scale, the area surrounded by one touch electrode 131 can cover multiple rows or multiple columns of sub-pixels, so as to ensure the required touch accuracy. Therefore, as shown in fig. 1 and 5, each touch electrode 131 may have a grid-like structure.
In some embodiments provided by the present invention, as shown in fig. 5, the touch display screen may further include: electrode traces 190 corresponding to the touch electrodes 131 one to one and touch signal terminals 200 corresponding to the touch electrodes 131 one to one; each touch electrode 131 is electrically connected to the corresponding touch signal terminal 200 through the corresponding electrode trace 190. Further, the in-cell touch screen may further include: a touch detection chip (not shown) electrically connected to each touch signal terminal 200. The touch detection chip is configured to load a capacitance detection pulse signal to each touch electrode 131, and determine a touch position by detecting a change in capacitance value of each touch electrode 131. Thus, each touch electrode is electrically connected with the touch detection chip.
Further, the in-cell touch screen may further include: and a display driving chip electrically connected to each pixel circuit 120 and the low-level signal trace 160. The display driving chip can be used for loading a low-level voltage signal to the touch electrode and loading each signal shown in fig. 4 to the pixel circuit, so that the touch display screen realizes a display function.
In order to reduce mutual interference between display and capacitive touch, a touch display screen is generally driven in a display and capacitive touch time-sharing driving manner. As shown in fig. 4, a frame time may include a display phase and a touch phase. In the display phase, the display driver chip loads the signals shown in fig. 4 to the pixel circuit 120, and loads the low-level voltage signal VSS to the low-level signal trace 160, so as to drive the touch display panel to display the image. In the touch control stage, a capacitance detection pulse signal is loaded on the touch control electrode through the touch control detection chip, and the touch control position is determined by detecting the change of the capacitance value of the touch control electrode. Or, since the orthographic projection of each touch electrode 131 on the substrate 100 is not overlapped with the orthographic projection of each first connection electrode 141 and each second connection electrode 142 on the substrate 100, the touch display screen may be driven by a method of driving the touch display screen simultaneously with the capacitive touch instead of the method of driving the touch display screen by time-sharing display and capacitive touch. This is determined by design according to the actual application environment, and is not limited herein. Furthermore, the display driving chip and the touch detection chip can be integrated into one chip, so that the integration level of the chip can be improved, the occupied space is reduced, and the production cost is reduced.
The embedded touch screen can also comprise a plurality of grid lines, and each electrode wire and each grid line can be arranged in the same layer and in an insulating mode, so that each electrode wire and each grid line can be prepared by adopting a one-step composition process, the preparation process is simplified, and the production cost is saved. Further, the gate line and the gate of the transistor in the pixel circuit are disposed on the same layer.
The embedded touch screen can also comprise a plurality of data lines, and each electrode wiring line and each data line can be arranged in the same layer and in an insulating mode, so that each electrode wiring line and each data line can be prepared by adopting a one-step composition process, the preparation process is simplified, and the production cost is saved. Furthermore, the data line and the source and drain electrodes of the transistors in the pixel circuit are arranged on the same layer.
The material of the active layer may include amorphous silicon (a-Si) or polysilicon (p-Si). Further, the thickness of the active layer may be set to be
Of course, the thickness of the active layer may be set to other thicknesses, which need to be designed according to the actual application environment, and is not limited herein.
The materials of the first insulating layer, the second insulating layer and the interlayer dielectric layer may include SiO 2 Or SiN x At least one of (1). Further, the thickness of the first insulating layer may be set to be
Or
The thickness of the second insulating layer may be set to
The thickness of the interlayer dielectric layer can be set to
Or
Of course, the thicknesses of the first insulating layer, the second insulating layer and the interlayer dielectric layer may also be set to other thicknesses, which need to be designed and determined according to the actual application environment, and are not limited herein.
The material of the gate electrode and the conductive layer may be metal, such as Mo, al, ag, au, etc. Further, the thickness of the layer on which the gate electrode is formed and the thickness of the conductive layer may be set to be
And the square resistance is 0.44 + -0.1 omega/\9633. Of course, the thickness of the layer on which the gate electrode is located, the thickness of the conductive layer, and the sheet resistance may also be set to other values, which need to be designed according to the actual application environment, and are not limited herein.
The source electrode and the drain electrode can be a Ti/Al/Ti laminated structure, wherein the thickness of the Ti layer can be
The thickness of the layer of Al may be
The square resistance of the source and the drain can be 0.046 +/-0.01 omega/9633. Further, the thickness, material and sheet resistance of the source and the drain may also be set in other realizable manners, which need to be designed according to the practical application environment, and are not limited herein.
The first and second connection electrodes may be a stacked structure of ITO/Ag/ITO. Wherein the thickness of the layer of ITO can be
The thickness of the layer of Ag may be
The sheet resistance can be 0.43 + -0.1 omega/\9633. Further, the thickness, material and sheet resistance of the first connection electrode and the second connection electrode may also be set in other realizable manners, which need to be designed according to the actual application environment, and are not limited herein.
The material of the planarization layer may include a resin. The material of the protective layer may include SiN x . The material of the black matrix may include resin.
Some embodiments of the present invention further provide a touch display screen, and schematic structural diagrams thereof are shown in fig. 6 and fig. 7.
In order to further reduce the production cost, in some embodiments of the invention, as shown in fig. 6 and 7, when the second connection electrode 142 is located on the touch electrode layer 130, the touch electrode 131 can be reused as the second connection electrode 142. That is, the touch electrode 131 is electrically connected to the low-level signal trace 160 to provide the low-level voltage signal VSS to the cathode of the light emitting device L. In this way, the second connecting electrode can be directly used as the touch electrode, so that the touch electrode does not need to be additionally arranged. In addition, a Mask (Mask) originally used for preparing the second connection electrode 142 can be finely adjusted, and a new pattern adopting the second connection electrode 142 can be formed, so that the process for preparing the Mask is reduced, and the production cost is reduced.
Further, in order to reduce mutual interference between display and capacitive touch, the touch display screen may be driven in a display and capacitive touch time-sharing driving manner.
Generally, the touch density of the touch screen is usually in the millimeter level, and therefore, the density and the size of the touch electrode 131 can be selected according to the required touch density to ensure the required touch precision. The size of the touch electrode 131 may be set to be between 4mm and 6mm, for example. Since the size of the LED chip is in the micron or nanometer scale, the area surrounded by one touch electrode 131 can cover multiple rows or columns of sub-pixels, so as to ensure the required touch accuracy. Therefore, as shown in fig. 6 and 5, each touch electrode 131 may have a grid-like structure.
Based on the same inventive concept, an embodiment of the present invention further provides a method for driving a touch display screen, as shown in fig. 8, the method may include:
s801, in a display stage, driving a touch display screen to display;
s802, in the touch control stage, a capacitance detection pulse signal is loaded on the touch control electrode, and the touch control position is determined by detecting the change of the capacitance value of the touch control electrode.
One frame time includes a display stage and a touch stage. Further, each frame time may be made to include: a display stage and a touch stage. Alternatively, one frame time spaced by at least one frame time may include: a display stage and a touch stage. For example, one frame time every other frame time includes a display phase and a touch phase, and the rest of the frame time includes only the display phase. That is, the odd frame time includes a display stage and a touch stage, and the even frame time includes a display stage, which is not limited herein. Alternatively, each frame time separated by five frame times may include a display stage and a touch stage, that is, the first and seventh frame times include the display stage and the touch stage, and the second to sixth frame times include the display stage, which is not limited herein. In addition, the number of the display phases and the touch phases included in one frame time may be determined according to the actual application environment, and is not limited herein.
In some embodiments provided by the present invention, loading a capacitive detection pulse signal to the touch electrode may specifically include: and simultaneously loading the same capacitance detection pulse signal to each touch electrode.
Further, in order to avoid the influence on other signal lines, at the same time of loading the capacitance detection pulse signal to the touch electrode, at least one of the gate line, the data line, the high-level signal trace (for transmitting the high-level voltage signal VDD to the pixel circuit) and the emission control signal line for transmitting the EM signal may be signal-modulated by superimposing a signal having the same frequency as the capacitance detection pulse signal on the basis of the signal.
The driving method of the touch display screen is described below by referring to fig. 4 and fig. 7 through a specific embodiment, but the reader should understand that the specific process is not limited thereto. The driving method of the touch display screen may include the steps of:
(1) In the display stage, the pixel circuits are driven line by line to drive the light-emitting devices to emit light so as to drive the touch display screen to display. When one row of pixel circuits emit light, a low-level voltage signal VSS is loaded to the second connecting electrode through the low-level signal wiring, a high-level voltage signal VDD is loaded to the pixel circuits through the high-level signal wiring, and GATEA, GATEB, EM, RST, data and Data _ T signals are loaded to the pixel circuits, so that the pixel circuits generate driving current, the driving current is transmitted to the light-emitting devices through the first connecting electrodes, and the light-emitting devices are driven to emit light.
(2) In the touch control stage, a capacitance detection pulse signal is loaded on each touch control electrode, and signals with the same frequency as the capacitance detection pulse signal are loaded on the basis of respective signals of the grid line, the data line, the high-level signal routing line and the light-emitting control signal line.
Based on the same inventive concept, the embodiment of the invention further provides a display device, which comprises the touch display screen provided by the embodiment of the invention. The principle of the display device for solving the problems is similar to that of the touch display screen, so the implementation of the display device can be referred to that of the touch display screen, and repeated parts are not described herein again.
The display device provided by the embodiment of the invention can be as follows: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Other essential components of the display device are understood by those skilled in the art, and are not described herein or should not be construed as limiting the invention.
According to the touch display screen, the driving method and the display device provided by the embodiment of the invention, the plurality of light-emitting devices and the pixel circuits which correspond to the light-emitting devices one to one are arranged on the substrate base plate, so that the light-emitting devices can be driven to emit light through the pixel circuits, and the display function is realized. The touch control electrode is arranged on one side of the light-emitting device facing the substrate base plate, so that the touch control display screen can realize a touch control function through the touch control electrode.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (11)
1. A touch display screen, comprising:
a base substrate;
a plurality of light emitting devices and a plurality of pixel circuits on the substrate;
wherein the plurality of pixel circuits correspond to the plurality of light emitting devices one to one;
each of the light emitting devices includes: a light emitting section, and a first electrode and a second electrode electrically connected to the light emitting section, respectively; in the same light emitting device, the first electrode and the second electrode are arranged on the same side of the light emitting part at intervals;
the touch electrode layer is positioned on one side, facing the substrate base plate, of the plurality of light-emitting devices; the touch electrode layer comprises a plurality of mutually independent touch electrodes;
the touch display screen further includes: electrode wires corresponding to the touch electrodes one to one and touch signal terminals corresponding to the touch electrodes one to one; each touch electrode is electrically connected with the corresponding touch signal terminal through the corresponding electrode routing.
2. The touch display screen of claim 1, wherein the plurality of pixel circuits are located between the plurality of light emitting devices and the substrate base plate; the touch display screen further includes: second connection electrodes between the plurality of pixel circuits and the plurality of light emitting devices and first connection electrodes in one-to-one correspondence with the respective light emitting devices;
the first electrode of each light emitting device is electrically connected with the corresponding pixel circuit through the corresponding first connecting electrode, and the second electrode of each light emitting device is electrically connected with the second connecting electrode;
at least one of the first connection electrode and the second connection electrode is located on the touch electrode layer.
3. The touch display screen of claim 2, wherein the touch electrode is multiplexed as the second connection electrode.
4. The touch display screen of claim 2, wherein an orthographic projection of each touch electrode on the substrate base plate is not overlapped with an orthographic projection of the first connecting electrode and the second connecting electrode on the substrate base plate.
5. The touch display screen of claim 4, wherein an orthographic projection of each touch electrode on the substrate does not overlap with an orthographic projection of each light emitting device on the substrate.
6. The touch display screen according to any one of claims 1-5, wherein each of the touch electrodes has a grid-like structure.
7. The touch display screen of any one of claims 1-5, wherein the light emitting portion comprises: electroluminescent layers or LED chips.
8. The touch display screen of claim 7, wherein the LED chips are micro-scale or nano-scale in size.
9. A display device characterized by comprising a touch display screen according to any one of claims 1 to 8.
10. A method of driving a touch display screen according to any one of claims 1 to 8, comprising:
in the display stage, the touch display screen is driven to display;
and in the touch control stage, a capacitance detection pulse signal is loaded on the touch control electrode, and the touch control position is determined by detecting the change of the capacitance value of the touch control electrode.
11. The driving method according to claim 10, wherein the applying a capacitive detection pulse signal to the touch electrode specifically includes:
and simultaneously loading the same capacitance detection pulse signal to each touch electrode.
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| CN110147179A (en) * | 2019-05-22 | 2019-08-20 | 京东方科技集团股份有限公司 | A kind of touch display substrate and preparation method thereof, touch control display apparatus |
| CN110853531B (en) * | 2019-11-21 | 2021-11-05 | 京东方科技集团股份有限公司 | Driving backboard for display, preparation method thereof and display panel |
| CN113077751B (en) * | 2020-01-03 | 2022-08-09 | 京东方科技集团股份有限公司 | Pixel driving circuit, driving method thereof and display panel |
| CN113540308B (en) * | 2020-04-22 | 2023-06-09 | 东莞市中麒光电技术有限公司 | Substrate structure of LED display module and manufacturing method |
| CN111653212B (en) * | 2020-06-10 | 2021-09-24 | 武汉华星光电技术有限公司 | Micro light-emitting diode display panel, manufacturing method thereof and display device |
| CN111930259A (en) * | 2020-08-20 | 2020-11-13 | 上海天马微电子有限公司 | Touch display device, touch display panel, array substrate and driving method |
| CN112068729A (en) * | 2020-08-26 | 2020-12-11 | 业成光电(无锡)有限公司 | Touch display module and touch display device |
| CN112181215B (en) * | 2020-09-28 | 2022-09-30 | 武汉天马微电子有限公司 | Touch display panel, touch detection method thereof and electronic equipment |
| CN112130698B (en) | 2020-09-30 | 2022-09-23 | 厦门天马微电子有限公司 | Display panel and display device |
| CN112363350B (en) * | 2020-11-10 | 2023-02-21 | 合肥鑫晟光电科技有限公司 | Back plate, backlight module and preparation method of back plate |
| CN112631458A (en) * | 2020-12-24 | 2021-04-09 | 苏州椒图电子有限公司 | LED touch display device and touch method thereof |
| CN114201073B (en) * | 2021-12-11 | 2023-11-07 | 武汉华星光电半导体显示技术有限公司 | Micro light-emitting diode touch display panel |
| CN114942709A (en) * | 2022-06-07 | 2022-08-26 | Oppo广东移动通信有限公司 | Touch display screen and touch display equipment |
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