CN106782271B - Pixel circuit, display panel and display device - Google Patents
Pixel circuit, display panel and display device Download PDFInfo
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- CN106782271B CN106782271B CN201710020029.XA CN201710020029A CN106782271B CN 106782271 B CN106782271 B CN 106782271B CN 201710020029 A CN201710020029 A CN 201710020029A CN 106782271 B CN106782271 B CN 106782271B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2003—Display of colours
Abstract
The invention discloses a pixel circuit, a display panel and a display device, comprising: the device comprises a luminous data writing module, a color data writing module, a first storage module, a second storage module and a luminous module; the five modules are matched with each other, so that one pixel can display different colors, the color of one pixel is prevented from being synthesized by the colors of a plurality of sub-pixels, and the high-precision display panel is favorably prepared.
Description
Technical Field
The invention relates to the technical field of display, in particular to a pixel circuit, a display panel and a display device.
Background
As display technologies have been developed, display panels used in mobile terminals such as personal computers, portable terminals, and various information devices have been developed rapidly, and most of the mobile terminals in the market employ flat panel display devices such as liquid crystal display devices, plasma display devices, field emission display devices, and organic light emitting diode display devices as display panels. At present, a common display panel combines colors of a plurality of sub-pixels into a color of a pixel to realize a color display function. However, the color of such a color display is different from the true color, and this also limits the development of high-definition displays.
Disclosure of Invention
Embodiments of the present invention provide a pixel circuit, a display panel, and a display device, so as to avoid using colors of a plurality of sub-pixels to synthesize a color of one pixel, so that the one pixel can realize multi-color display.
Accordingly, an embodiment of the present invention provides a pixel circuit, including: the device comprises a luminous data writing module, a color data writing module, a luminous module, a first storage module and a second storage module; wherein the content of the first and second substances,
the control end of the luminous data writing module is connected with the scanning signal end, the input end of the luminous data writing module is connected with the luminous data signal end, and the output end of the luminous data writing module is connected with the first node; the luminous data writing module is used for providing a signal of the luminous data signal end to the first node under the control of the scanning signal end;
the control end of the color data writing module is connected with the scanning signal end, the input end of the color data writing module is connected with the color data signal end, and the output end of the color data writing module is connected with the second node; the color data writing module is used for providing the signal of the color data signal end to the second node under the control of the scanning signal end;
the control end of the light-emitting module is connected with the second node, the input end of the light-emitting module is connected with the first node, and the output end of the light-emitting module is connected with a reference voltage end; the light-emitting module is used for emitting light under the common control of the reference voltage end and the signal of the first node, and displaying different colors under the control of the signal of the second node;
the first end of the first storage module is connected with the first node, and the second end of the first storage module is connected with the reference voltage end; the first storage module is used for charging under the common control of signals of the reference voltage end and the first node, and keeping a voltage difference between the first node and the reference voltage end stable when the first node is in a floating state;
the first end of the second storage module is connected with the second node, and the second end of the second storage module is connected with the reference voltage end; the second storage module is used for charging under the common control of signals of the reference voltage end and the second node, and keeping the voltage difference between the second node and the reference voltage end stable when the second node is in a floating state.
Preferably, in the above pixel circuit provided in an embodiment of the present invention, the light emitting module includes: a light emitting transistor; wherein the content of the first and second substances,
the grid electrode of the light-emitting transistor is the control end of the light-emitting module, the source electrode of the light-emitting transistor is the input end of the light-emitting module, and the drain electrode of the light-emitting transistor is the output end of the light-emitting module.
Preferably, in the pixel circuit provided by the embodiment of the present invention, the material of the active layer of the light emitting transistor is a graphene material in a semi-reduced state.
Preferably, in the above pixel circuit provided in an embodiment of the present invention, the light-emitting data writing module includes: a first switching transistor; wherein the content of the first and second substances,
the gate of the first switching transistor is the control end of the luminous data writing module, the source is the input end of the luminous data writing module, and the drain is the output end of the luminous data writing module.
Preferably, in the pixel circuit provided in an embodiment of the present invention, the color data writing module includes: a second switching transistor; wherein the content of the first and second substances,
the gate of the second switching transistor is the control end of the color data writing module, the source is the input end of the color data writing module, and the drain is the output end of the color data writing module.
Preferably, in the above pixel circuit provided in an embodiment of the present invention, the first storage module includes: a first capacitor; wherein the content of the first and second substances,
the first end of the first capacitor is the first end of the first storage module, and the second end of the first capacitor is the second end of the first storage module.
Preferably, in the pixel circuit provided in an embodiment of the present invention, the second storage module includes: a second capacitor; wherein the content of the first and second substances,
the first end of the second capacitor is the first end of the second storage module, and the second end of the second capacitor is the second end of the second storage module.
Correspondingly, the embodiment of the invention also provides a display panel which comprises any one of the pixel circuits provided by the embodiment of the invention.
Preferably, in the display panel provided in the embodiment of the present invention, the display panel further includes a display driving chip, a light-emitting data line connected between the light-emitting data signal terminal and the display driving chip, and a color data line connected between the color data signal terminal and the display driving chip;
the display driving chip is used for outputting a light-emitting data signal to the light-emitting data signal end and outputting a color data signal to the color data signal end.
Correspondingly, the embodiment of the invention also provides a display device which comprises any one of the display panels provided by the embodiment of the invention.
The invention has the following beneficial effects:
the pixel circuit, the display panel and the display device provided by the embodiment of the invention comprise: the device comprises a luminous data writing module, a color data writing module, a first storage module, a second storage module and a luminous module; the luminous data writing module is used for providing a signal of a luminous data signal end to a first node under the control of a scanning signal end; the color data writing module is used for providing the signal of the color data signal end to the second node under the control of the scanning signal end; the light-emitting module is used for emitting light under the common control of the reference voltage end and the signal of the first node and displaying different colors under the control of the signal of the second node; the first storage module is used for charging under the common control of signals of a reference voltage end and a first node, and keeping the voltage difference between the first node and the reference voltage end stable when the first node is in a floating state; the second storage module is used for charging under the common control of signals of the reference voltage end and the second node, and keeping the voltage difference between the second node and the reference voltage end stable when the second node is in a floating state. Therefore, through the mutual matching of the five modules, one pixel can display different colors, so that the color of one pixel is prevented from being synthesized by the colors of a plurality of sub-pixels, and the preparation of a high-precision display panel is facilitated.
Drawings
Fig. 1 is a schematic structural diagram of a pixel circuit according to an embodiment of the present invention;
fig. 2a is a schematic diagram of a specific structure of a pixel circuit according to an embodiment of the present invention;
fig. 2b is a second schematic structural diagram of a pixel circuit according to an embodiment of the present invention;
fig. 2c is a third schematic structural diagram of a pixel circuit according to an embodiment of the present invention;
fig. 2d is a fourth schematic structural diagram of a pixel circuit 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 pixel circuit, a display panel and a display device according to an embodiment 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 in the present application may be combined with each other without conflict.
An embodiment of the present invention provides a pixel circuit, as shown in fig. 1, including: the device comprises a luminous data writing module 1, a color data writing module 2, a luminous module 3, a first storage module 4 and a second storage module 5; wherein the content of the first and second substances,
a control end 1a of the light-emitting Data writing module 1 is connected with a scanning signal end Scan, an input end 1b is connected with a light-emitting Data signal end Data1, and an output end 1c is connected with a first node a; the light-emitting Data writing module 1 is used for providing the signal of the light-emitting Data signal terminal Data1 to the first node a under the control of the scanning signal terminal Scan;
the control terminal 2a of the color Data writing module 2 is connected to the Scan signal terminal Scan, the input terminal 2B is connected to the color Data signal terminal Data2, and the output terminal 2c is connected to the second node B; the color Data writing module 2 is used for providing the signal of the color Data signal terminal Data2 to the second node B under the control of the scanning signal terminal Scan;
a control end 3a of the light emitting module 3 is connected with a second node B, an input end 3B is connected with a first node A, and an output end 3c is connected with a reference voltage end VCC; the light emitting module 3 is used for emitting light under the common control of a reference voltage terminal VCC and a signal of a first node a, and displaying different colors under the control of a signal of a second node B;
a first end 4a of the first storage module 4 is connected with a first node a, and a second end 4b is connected with a reference voltage terminal VCC; the first storage module 4 is configured to perform charging under common control of signals of the reference voltage terminal VCC and the first node a, and maintain a voltage difference between the first node a and the reference voltage terminal VCC stable when the first node a is in a floating state;
a first end 5a of the second storage module 5 is connected with the second node B, and a second end 5B is connected with a reference voltage terminal VCC; the second storage module 5 is configured to perform charging under the common control of the signals of the reference voltage terminal VCC and the second node B, and maintain a stable voltage difference between the second node B and the reference voltage terminal VCC when the second node B is in a floating state.
The pixel circuit provided by the embodiment of the invention comprises: the device comprises a luminous data writing module, a color data writing module, a first storage module, a second storage module and a luminous module; the luminous data writing module is used for providing a signal of a luminous data signal end to a first node under the control of a scanning signal end; the color data writing module is used for providing the signal of the color data signal end to the second node under the control of the scanning signal end; the light-emitting module is used for emitting light under the common control of the reference voltage end and the signal of the first node and displaying different colors under the control of the signal of the second node; the first storage module is used for charging under the common control of signals of a reference voltage end and a first node, and keeping the voltage difference between the first node and the reference voltage end stable when the first node is in a floating state; the second storage module is used for charging under the common control of signals of the reference voltage end and the second node, and keeping the voltage difference between the second node and the reference voltage end stable when the second node is in a floating state. Therefore, according to the pixel circuit provided by the embodiment of the invention, through the mutual cooperation of the five modules, one pixel can display different colors, so that the color of one pixel is prevented from being synthesized by the colors of a plurality of sub-pixels, and the preparation of a high-precision display panel is facilitated.
In a specific implementation, in the pixel circuit provided in the embodiment of the present invention, the voltage Vcc of the reference voltage terminal and the voltage Vdata1 of the light-emitting data signal terminal satisfy the relationship: vdata1> Vcc.
The present invention will be described in detail with reference to specific examples. It should be noted that the present embodiment is intended to better explain the present invention, but not to limit the present invention.
Specifically, in the above-mentioned pixel circuit provided in the embodiment of the present invention, as shown in fig. 2a to 2d, the light-emitting data writing module 1 may specifically include: a first switching transistor M1; wherein the content of the first and second substances,
the gate of the first switching transistor M1 is the control terminal 1a of the light-emitting data writing module 1, the source is the input terminal 1b of the light-emitting data writing module 1, and the drain is the output terminal 1c of the light-emitting data writing module 1.
In specific implementation, in the pixel circuit provided by the embodiment of the invention, when the active pulse signal at the Scan signal terminal Scan is at a high potential, as shown in fig. 2a and 2b, the first switching transistor M1 may be an N-type switching transistor. When the active pulse signal at the Scan signal terminal Scan is at a low voltage level, as shown in fig. 2c and 2d, the first switching transistor M1 may also be a P-type switching transistor, and in practical applications, the specific type of the first switching transistor M1 needs to be determined according to practical application environments, which is not limited herein.
In a specific implementation, in the pixel circuit provided in the embodiment of the present invention, when the first switching transistor is in an on state under the control of the scan signal terminal, the signal of the emission data signal terminal is provided to the first node.
The above is merely an example of the specific structure of the light-emitting data writing module in the pixel circuit provided in the embodiment of the present invention, and in the implementation, the specific structure of the light-emitting data writing module is not limited to the above structure provided in the embodiment of the present invention, and may be other structures known to those skilled in the art, and is not limited herein.
Specifically, in the pixel circuit provided in the embodiment of the present invention, as shown in fig. 2a to 2d, the color data writing module 2 may specifically include: a second switching transistor M2; wherein the content of the first and second substances,
the gate of the second switching transistor M2 is the control terminal 2a of the color data writing module 2, the source is the input terminal 2b of the color data writing module 2, and the drain is the output terminal 2c of the color data writing module 2.
In practical implementation, in the pixel circuit provided in the embodiment of the present invention, when the active pulse signal at the Scan signal terminal Scan is at a high potential, as shown in fig. 2a and 2b, the second switching transistor M2 may be an N-type switching transistor. When the active pulse signal at the Scan signal terminal Scan is at a low voltage level, as shown in fig. 2c and 2d, the second switching transistor M2 may also be a P-type switching transistor, and in practical applications, the specific type of the second switching transistor M2 needs to be determined according to practical application environments, which is not limited herein.
In a specific implementation, in the pixel circuit provided in the embodiment of the present invention, when the second switching transistor is in a conducting state under the control of the scan signal terminal, the signal of the color data signal terminal is provided to the first node.
The above is merely an example of the specific structure of the color data writing module in the pixel circuit provided in the embodiment of the present invention, and in the implementation, the specific structure of the color data writing module is not limited to the above structure provided in the embodiment of the present invention, and may be other structures known to those skilled in the art, and is not limited herein.
Specifically, in the above pixel circuit provided in the embodiment of the present invention, as shown in fig. 2a to 2d, the light emitting module 3 may specifically include: a light emitting transistor MD; wherein the content of the first and second substances,
the gate of the light emitting transistor MD is the control terminal 3a of the light emitting module 3, the source is the input terminal 3b of the light emitting module 3, and the drain is the output terminal 3c of the light emitting module 3.
In practical implementation, in the pixel circuit provided by the embodiment of the invention, as shown in fig. 2a and 2d, the light emitting transistor MD may be an N-type switching transistor. Alternatively, as shown in fig. 2b and 2c, the light emitting transistor MD may be a P-type switching transistor. In practical applications, the specific type of the light emitting transistor MD needs to be determined according to practical application environments, and is not limited herein.
In a specific implementation, in the pixel circuit provided in the embodiment of the present invention, the light emitting transistor emits light when a current is provided between the source and the drain thereof, that is, the light emitting transistor emits light when a current is provided between the source and the drain thereof under the control of the signal of the first node and the signal of the reference voltage. The light emitting transistor may display different colors under the control of a voltage of its gate.
Because the semi-reduced graphene material can emit light when voltage is applied, and has the characteristics of high conductivity of graphene and wide band gap of graphene oxide, the Fermi level of the semi-reduced graphene material can be modulated by constructing an in-plane grid structure and applying voltage to a grid, so that the central wavelength of light emission of the semi-reduced graphene material can be regulated. In a specific implementation, in the pixel circuit provided in the embodiment of the present invention, the active layer of the light emitting transistor is made of a graphene material in a semi-reduced state. The structural relationship between the gate, the active layer, the source and the drain of the light emitting transistor is the same as that in the prior art, and it should be understood by those skilled in the art that the present invention is not limited thereto.
In specific implementation, in the pixel circuit provided in the embodiment of the present invention, when the active layer of the light emitting transistor is made of a graphene material in a semi-reduced state, and the voltage of the gate of the light emitting transistor is 0V, the light emitting transistor displays red light; when the voltage of the grid electrode of the light-emitting transistor is 30V, the light-emitting color displayed by the light-emitting transistor is green; when the voltage of the gate of the light emitting transistor is 60V, the light emitting transistor displays blue light. The above is merely an example to illustrate that the light emitting transistor may display different colors when different voltages are applied to its gate. In practical applications, the voltage of the gate of the light emitting transistor needs to be determined according to practical applications, and is not limited herein.
In a specific implementation, the light emitting intensity of the pixel circuit provided in the embodiment of the present invention can be further controlled by controlling the magnitude of the current between the source and the drain of the light emitting transistor, that is, the light emitting intensity of the light emitting transistor can be controlled by controlling the voltage difference between the first node and the reference voltage terminal.
The above is merely an example of the specific structure of the light emitting module in the pixel circuit provided in the embodiment of the present invention, and in the implementation, the specific structure of the light emitting module is not limited to the above structure provided in the embodiment of the present invention, and may be other structures known to those skilled in the art, and is not limited herein.
Specifically, in practical implementation, in the pixel circuit provided in the embodiment of the present invention, as shown in fig. 2a to 2d, the first storage module 4 may specifically include: a first capacitance C1; wherein the content of the first and second substances,
the first terminal of the first capacitor C1 is the first terminal 4a of the first memory module 4, and the second terminal of the first capacitor C1 is the second terminal 4b of the first memory module 4.
In a specific implementation, in the pixel circuit provided in the embodiment of the present invention, the first capacitor is charged under the common control of the reference voltage terminal and the signal of the first node. When the first node is in a floating state, the voltage difference between the two ends of the first capacitor can be kept stable due to the bootstrap effect of the first capacitor, namely, the voltage difference between the first node and the reference voltage end is kept stable.
The above is merely an example of the specific structure of the first memory module in the pixel circuit provided in the embodiment of the present invention, and in the implementation, the specific structure of the first memory module is not limited to the above structure provided in the embodiment of the present invention, and may be other structures known to those skilled in the art, and is not limited herein.
Specifically, in the above pixel circuit provided in the embodiment of the present invention, as shown in fig. 2a to 2d, the second storage module 5 may specifically include: a second capacitance C2; wherein the content of the first and second substances,
the first terminal of the second capacitor C2 is the first terminal 5a of the second memory module 5, and the second terminal of the second capacitor C2 is the second terminal 5b of the second memory module 5.
In a specific implementation, in the pixel circuit provided in the embodiment of the present invention, the second capacitor is charged under the common control of the reference voltage terminal and the signal of the second node. When the second node is in a floating state, the voltage difference between the two ends of the second capacitor can be kept stable due to the bootstrap effect of the second capacitor, that is, the voltage difference between the second node and the reference voltage end is kept stable.
The above is merely an example of the specific structure of the second memory module in the pixel circuit provided in the embodiment of the present invention, and in the implementation, the specific structure of the second memory module is not limited to the above structure provided in the embodiment of the present invention, and may be other structures known to those skilled in the art, and is not limited herein.
Preferably, in order to simplify the manufacturing process, in the shift register provided in the embodiment of the present invention, as shown in fig. 2a, the light emitting transistors and all the switching transistors may be N-type switching transistors; alternatively, as shown in fig. 2d, the light emitting transistors and all the switching transistors may be P-type switching transistors, which is not limited herein.
Furthermore, in specific implementation, the N-type switch transistor is turned on under the action of high potential and is turned off under the action of low potential; the P-type switching transistor is turned off under the action of a high potential and turned on under the action of a low potential.
It should be noted that the switching Transistor mentioned in the above embodiments of the present invention may be a Thin Film Transistor (TFT) or a Metal oxide semiconductor field effect Transistor (MOS), and is not limited herein. In specific implementation, the functions of the sources and the drains of the transistors can be interchanged according to the types of the transistors and different input signals, and are not particularly distinguished.
The following describes the operation of the pixel circuit provided in the embodiment of the present invention by taking the specific structure shown in fig. 2a as an example.
As shown in fig. 2a, the first switching transistor M1, the second switching transistor M2, and the light emitting transistor MD are all N-type transistors. When the potential of the signal at the Scan signal terminal Scan is high, both the first switching transistor M1 and the second switching transistor M2 are turned on. Since the first switching transistor M1 is turned on and supplies the signal of the light emitting Data signal terminal Data1 to the first node a, the voltage VA at the first node a is Vdata1, and the first capacitor C1 is charged so that the voltage difference across it is Vdata 1-Vcc. Since Vdata1> Vcc, there is a current between the source and the drain of the light emitting transistor MD, causing the light emitting transistor MD to emit light. Since the second switching transistor M2 is turned on and supplies the signal of the color Data signal terminal Data2 to the second node B, the voltage VB at the second node B is Vdata2, and the second capacitor C2 is charged so that the voltage difference across it is Vdata2-Vcc, where Vdata2 is the voltage of the signal of the color Data signal terminal Data 2. Accordingly, the gate voltage of the light emitting transistor MD is Vdata2, and the light emitting transistor MD is controlled to display light of a color corresponding to Vdata 2. For example, when Vdata2 is 0V, the light emitting transistor MD emits red light; when Vdata2 is 30V, the light-emitting transistor MD emits green light; when Vdata2 is 60V, the light-emitting transistor MD emits blue light.
Generally, after the signal of the current color Data signal terminal Data2 is written, the signal of the Scan signal terminal Scan becomes a low voltage level before the next color Data signal terminal Data2 comes, so that when the signal of the Scan signal terminal Scan is at the low voltage level, the first switching transistor M1 and the second switching transistor M2 are both turned off, and the first node a and the second node B are both in a floating state. Since the first node a is in a floating state, the voltage difference between the first node a and the reference voltage terminal can be kept stable due to the bootstrap effect of the first capacitor C1, and thus the voltage difference between the source and the drain of the light emitting transistor MD can be kept at Vdata1-Vcc, so that the light emitting transistor MD can keep emitting light. Since the second node B is in a floating state, the voltage difference between the second node B and the reference voltage terminal can be kept stable due to the bootstrap action of the second capacitor C2, so that the voltage of the gate of the light emitting transistor MD is kept at Vdata2, thereby continuously controlling the light emitting transistor MD to display light of a color corresponding to Vdata 2. And the signals of the scanning signals are scanned line by line, so that the display of the whole screen is realized.
The pixel circuit provided by the embodiment of the invention can enable one pixel to emit light with different colors through a simple structure, thereby being beneficial to the preparation of a high-precision display panel.
Based on the same inventive concept, an embodiment of the present invention further provides a display panel, including any one of the pixel circuits provided in the embodiments of the present invention. The principle of the display panel to solve the problem is similar to the pixel circuit, so the implementation of the display panel can refer to the implementation of the pixel circuit, and the repeated parts are not described herein again.
In a specific implementation, the display panel provided in the embodiment of the present invention may further include a display driving chip, a light-emitting data line connected between the light-emitting data signal terminal and the display driving chip, and a color data line connected between the color data signal terminal and the display driving chip;
the display driving chip is used for outputting the light-emitting data signals to the light-emitting data signal end and outputting the color data signals to the color data signal end.
Based on the same inventive concept, the embodiment of the invention further provides a display device, which comprises any one of the display panels provided by the embodiment of the invention. The display device may be: 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. The implementation of the display device can refer to the above embodiments of the pixel circuit, and repeated descriptions are omitted.
The pixel circuit, the display panel and the display device provided by the embodiment of the invention comprise: the device comprises a luminous data writing module, a color data writing module, a first storage module, a second storage module and a luminous module; the luminous data writing module is used for providing a signal of a luminous data signal end to a first node under the control of a scanning signal end; the color data writing module is used for providing the signal of the color data signal end to the second node under the control of the scanning signal end; the light-emitting module is used for emitting light under the common control of the reference voltage end and the signal of the first node and displaying different colors under the control of the signal of the second node; the first storage module is used for charging under the common control of signals of a reference voltage end and a first node, and keeping the voltage difference between the first node and the reference voltage end stable when the first node is in a floating state; the second storage module is used for charging under the common control of signals of the reference voltage end and the second node, and keeping the voltage difference between the second node and the reference voltage end stable when the second node is in a floating state. Therefore, through the mutual matching of the five modules, one pixel can display different colors, so that the color of one pixel is prevented from being synthesized by the colors of a plurality of sub-pixels, and the preparation of a high-precision display panel is facilitated.
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 (9)
1. A pixel circuit, comprising: the device comprises a luminous data writing module, a color data writing module, a luminous module, a first storage module and a second storage module; wherein the content of the first and second substances,
the control end of the luminous data writing module is connected with the scanning signal end, the input end of the luminous data writing module is connected with the luminous data signal end, and the output end of the luminous data writing module is connected with the first node; the luminous data writing module is used for providing a signal of the luminous data signal end to the first node under the control of the scanning signal end;
the control end of the color data writing module is connected with the scanning signal end, the input end of the color data writing module is connected with the color data signal end, and the output end of the color data writing module is connected with the second node; the color data writing module is used for providing the signal of the color data signal end to the second node under the control of the scanning signal end;
the control end of the light-emitting module is connected with the second node, the input end of the light-emitting module is connected with the first node, and the output end of the light-emitting module is connected with a reference voltage end; the light-emitting module is used for emitting light under the common control of the reference voltage end and the signal of the first node, and displaying different colors under the control of the signal of the second node;
the first end of the first storage module is connected with the first node, and the second end of the first storage module is connected with the reference voltage end; the first storage module is used for charging under the common control of signals of the reference voltage end and the first node, and keeping a voltage difference between the first node and the reference voltage end stable when the first node is in a floating state;
the first end of the second storage module is connected with the second node, and the second end of the second storage module is connected with the reference voltage end; the second storage module is used for charging under the common control of signals of the reference voltage end and the second node, and keeping a voltage difference between the second node and the reference voltage end stable when the second node is in a floating state;
the light emitting data writing module includes: a first switching transistor; wherein the content of the first and second substances,
the gate of the first switching transistor is the control end of the luminous data writing module, the source is the input end of the luminous data writing module, and the drain is the output end of the luminous data writing module.
2. The pixel circuit of claim 1, wherein the light emitting module comprises: a light emitting transistor; wherein the content of the first and second substances,
the grid electrode of the light-emitting transistor is the control end of the light-emitting module, the source electrode of the light-emitting transistor is the input end of the light-emitting module, and the drain electrode of the light-emitting transistor is the output end of the light-emitting module.
3. The pixel circuit according to claim 2, wherein a material of an active layer of the light emitting transistor is a graphene material in a semi-reduced state.
4. The pixel circuit of claim 1, wherein the color data write module comprises: a second switching transistor; wherein the content of the first and second substances,
the gate of the second switching transistor is the control end of the color data writing module, the source is the input end of the color data writing module, and the drain is the output end of the color data writing module.
5. The pixel circuit of claim 1, wherein the first storage module comprises: a first capacitor; wherein the content of the first and second substances,
the first end of the first capacitor is the first end of the first storage module, and the second end of the first capacitor is the second end of the first storage module.
6. The pixel circuit of claim 1, wherein the second storage module comprises: a second capacitor; wherein the content of the first and second substances,
the first end of the second capacitor is the first end of the second storage module, and the second end of the second capacitor is the second end of the second storage module.
7. A display panel comprising the pixel circuit according to any one of claims 1 to 6.
8. The display panel according to claim 7, further comprising a display driving chip, a light emission data line connected between the light emission data signal terminal and the display driving chip, and a color data line connected between the color data signal terminal and the display driving chip;
the display driving chip is used for outputting a light-emitting data signal to the light-emitting data signal end and outputting a color data signal to the color data signal end.
9. A display device characterized by comprising the display panel according to claim 7 or 8.
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| CN208045072U (en) | 2018-04-27 | 2018-11-02 | 京东方科技集团股份有限公司 | A kind of pixel circuit, display device |
| CN109888072B (en) * | 2019-04-03 | 2024-01-30 | 南京紫科光电科技有限公司 | Graphene-based wavelength-adjustable LED and preparation method thereof |
| CN110033729B (en) * | 2019-05-17 | 2022-10-04 | 京东方科技集团股份有限公司 | Pixel circuit, display panel, driving method and display device |
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