CN203480809U - Pixel circuit and displayer - Google Patents

Abstract

The utility model discloses a pixel circuit and a display, which are used for reducing the size of the pixel circuit, further reducing the pixel pitch, increasing the number of pixels in a unit area, and improving the picture display quality. The pixel circuit includes: a first pixel sub-circuit and a second pixel sub-circuit, an initialization module and a data voltage writing module connected to the first pixel sub-circuit and the second pixel sub-circuit, and the initialization module is connected to a reset signal terminal and the low potential terminal, used to initialize the first pixel sub-circuit and the second pixel sub-circuit under the control of the reset signal input from the reset signal terminal; the data voltage writing module is connected to the data voltage and the gate signal terminal, and is used to Under the control of the signal input from the terminal, first write the first data voltage to the first pixel sub-circuit, and compensate the driving module of the first pixel sub-circuit, then write the second data voltage to the second pixel sub-circuit, and The driving module of the second pixel sub-circuit is compensated.

Description

A pixel circuit and display

technical field

The utility model relates to the technical field of displays, in particular to a pixel circuit and a display.

Background technique

At present, the backplane of high-end small and medium-sized Active Matrix Organic Light Emitting Diode (AMOLED) products mostly uses Low Temperature Poly-Silicon (LTPS) process technology. The threshold voltage drift of the Film Transistor (TFT) device makes the current driving the Organic Light Emitting Diode (OLED) device unstable and degrades the picture display quality. The pixel compensation circuit in the prior art is a 6T1C circuit (a circuit composed of 6 thin film transistors and 1 capacitor). The circuit diagram is shown in Figure 1. In the figure, VDD is a high voltage level signal, and VSS is a low voltage level Signal, Data is the data signal, Gate is the gate control signal, Reset is the initialization control signal, Vinit is the initialization voltage level signal, and Emission (ie EM) is the signal to control the OLED to emit light, which is provided by the emission circuit of the OLED panel. However, it is not easy to arrange 6 thin film transistors and 1 capacitor in one pixel, and the TFT device needs to be made very small, so the performance requirements of the TFT device are relatively high, which will lead to pixel pitch (Pixel Pitch) Cannot be lowered further.

As shown in Figure 2, the number of components that need to be arranged in the horizontal direction of 2 pixels in the 6T1C circuit in the prior art is: 2 data signal lines: Data v1 and Data v2, 12 TFTs, 2 capacitors, 1 gate control signal line Gate, 1 light emission control signal Emission, 1 high voltage level signal VDD, 1 initialization voltage level signal Vinit, 1 initialization control signal Reset, there are two organic light emitting diodes in Figure 2 The cathodes of OLED1 and OLED2 are both connected to the low-voltage level signal VSS. Figure 2 is a schematic circuit diagram of two pixels arranged horizontally. The horizontal or vertical direction is connected together. The components that need to be arranged in the vertical direction The number is: 1 data signal line, 12 TFTs, 2 capacitors, 2 gate control signal lines, 1 light control signal Emission, 1 high voltage level signal VDD, and 1 initialization voltage level signal Vinit.

To sum up, in the prior art, 12 TFTs and 2 capacitors need to be arranged in 2 pixels.

Utility model content

The embodiment of the utility model provides a pixel circuit, which is used to reduce the size of the pixel circuit, further reduce the pixel pitch, increase the number of pixels in a unit area, and improve the display quality of the picture. The utility model also provides a display.

According to an embodiment of the present invention, a pixel circuit is provided, including: a first pixel sub-circuit and a second pixel sub-circuit, and an initialization module and a data initialization module connected to the first pixel sub-circuit and the second pixel sub-circuit voltage write module,

The initialization module is connected to the reset signal terminal and the low potential terminal, and is used to initialize the first pixel sub-circuit and the second pixel sub-circuit under the control of the reset signal input from the reset signal terminal;

The data voltage writing module is connected to the data voltage and the gate signal terminal, and is used to first write the first data voltage to the first pixel sub-circuit under the control of the signal input from the gate signal terminal, and to write the first data voltage to the first pixel sub-circuit. The driving module performs compensation, and then writes the second data voltage into the second pixel sub-circuit, and performs compensation to the driving module of the second pixel sub-circuit.

The pixel circuit provided by the embodiment of the present invention includes: a first pixel sub-circuit and a second pixel sub-circuit, an initialization module connected to the first pixel sub-circuit and the second pixel sub-circuit and a data voltage writing module, the pixel circuit composed of the first pixel sub-circuit, the second pixel sub-circuit, the initialization module and the data voltage writing module can reduce the size of the pixel circuit, thereby reducing the pixel pitch, and increasing the number of pixels per unit area. number to improve the display quality of the screen.

Preferably, the first pixel sub-circuit includes a first driving module, a first light emitting module, a first threshold compensation module and a first light emitting control module,

The first threshold compensation module is connected to the initialization module, and is used to initialize the first threshold compensation module under the control of the initialization signal output by the initialization module;

The first threshold compensation module is connected to the first driving module for performing threshold voltage compensation on the first driving module;

The first light-emitting module is connected to the first driving module and the first light-emitting control module, and is used for performing light-emitting display under the action of the first driving module and the first light-emitting control module.

In this way, the first pixel sub-circuit composed of the first driving module, the first light emitting module, the first threshold compensation module and the first light emitting control module is simple and convenient to implement in the design of the pixel circuit.

Preferably, the first threshold compensation module includes a first storage capacitor, a second transistor and a fourth transistor; the first driving module includes a fifth transistor; the first light emission control module includes a seventh transistor and a ninth transistor. Transistor; the first light emitting module includes a first light emitting diode.

In this way, the first pixel sub-circuit composed of a storage capacitor, a transistor and a light-emitting diode is simple and convenient to implement in the design of the pixel circuit.

Preferably, one end of the first storage capacitor is connected to the high voltage level signal line, and the other end is connected to the source of the second transistor;

The gate of the second transistor is connected to the first control signal line, and the drain of the second transistor is connected to the initialization module;

The gate of the fourth transistor is connected to the gate signal terminal, and the source of the fourth transistor is connected to the initialization module;

The gate of the fifth transistor is connected to the initialization module, the drain of the fifth transistor is connected to the drain of the fourth transistor, and the source of the fifth transistor is connected to the data voltage writing module connected;

The gate of the seventh transistor is connected to the light emission control signal line, the source of the seventh transistor is connected to the high voltage level signal line, and the drain of the seventh transistor is connected to the source of the fifth transistor;

The gate of the ninth transistor is connected to the light-emitting control signal line, the source of the ninth transistor is connected to the drain of the fifth transistor, and the drain of the ninth transistor is connected to the first light-emitting diode;

The anode of the first light emitting diode is connected to the drain of the ninth transistor, and the cathode of the first light emitting diode is connected to the low voltage level signal line.

In this way, the connection relationship among the storage capacitor, the transistor and the light emitting diode is simple and convenient to implement in the design of the pixel circuit.

Preferably, the second pixel sub-circuit includes a second driving module, a second light emitting module, a second threshold compensation module and a second light emitting control module,

The second threshold compensation module is connected to the initialization module, and is used to initialize the second threshold compensation module under the control of the initialization signal output by the initialization module;

The second threshold compensation module is connected to the second driving module, and is used for performing threshold voltage compensation on the second driving module;

The second light-emitting module is connected to the second driving module and the second light-emitting control module, and is used for performing light-emitting display under the action of the second driving module and the second light-emitting control module.

In this way, the second pixel sub-circuit composed of the second driving module, the second light emitting module, the second threshold compensation module and the second light emitting control module is simple and convenient to implement in the design of the pixel circuit.

Preferably, the second threshold compensation module includes a second storage capacitor and an eighth transistor; the second driving module includes a sixth transistor; the second light emission control module includes a seventh transistor and a tenth transistor; the The second light emitting module includes a second light emitting diode.

In this way, the second pixel sub-circuit composed of a storage capacitor, a transistor and a light-emitting diode is simple and convenient to implement in the design of the pixel circuit.

Preferably, one end of the second storage capacitor is connected to the high voltage level signal line, and the other end is connected to the source of the eighth transistor;

The gate of the eighth transistor is connected to the second control signal line, and the drain of the eighth transistor is connected to the initialization module;

The gate of the seventh transistor is connected to the light emission control signal line, the source of the seventh transistor is connected to the high voltage level signal line, and the drain of the seventh transistor is connected to the source of the sixth transistor;

The gate of the sixth transistor is connected to the source of the eighth transistor, the source of the sixth transistor is connected to the data voltage writing module, and the drain of the sixth transistor is connected to the second light emitting diode connected;

The gate of the tenth transistor is connected to the light-emitting control signal line, the source of the tenth transistor is connected to the drain of the sixth transistor, and the drain of the tenth transistor is connected to the second light-emitting diode;

The anode of the second light emitting diode is connected to the drain of the tenth transistor, and the cathode of the second light emitting diode is connected to the low voltage level signal line.

In this way, the connection relationship among the storage capacitor, the transistor and the light emitting diode is simple and convenient to implement in the design of the pixel circuit.

Preferably, the initialization module includes a third transistor, the gate of the third transistor is connected to the reset signal line, and the source of the third transistor is connected to the first threshold compensation module and the second threshold compensation module of the first pixel sub-circuit. The second threshold compensation module of the pixel sub-circuit is connected, and the drain of the third transistor is connected to the low voltage level signal line.

In this way, the initialization module includes a third transistor, and the third transistor is used as a switching device of the initialization module in the pixel circuit, which is convenient, simple and easy to implement in circuit design.

Preferably, the data voltage writing module includes a first transistor, wherein the gate of the first transistor is connected to the gate signal control line, the source of the first transistor is connected to the data signal line, and the first transistor The drain of a transistor is connected with the first driving module of the first pixel sub-circuit and the second driving module of the second pixel sub-circuit.

In this way, the data voltage writing module includes a first transistor, and the first transistor is used as a switching device of the data voltage writing module in the pixel circuit, which is convenient and simple in circuit design and easy to implement.

Preferably, the data voltage input to the data voltage writing module includes a first data voltage and a second data voltage, wherein the first data voltage is used to drive the first threshold compensation module to perform threshold voltage compensation on the first driving module , the second data voltage is used to drive the second threshold compensation module to perform threshold voltage compensation on the second driving module.

In this way, since the data signal is a ladder-shaped timing signal, two different voltage values can be input by one data signal line.

Preferably, both the first light emitting diode and the second light emitting diode are organic light emitting diodes.

In this way, using organic light emitting diodes as light emitting diodes in the first light emitting module in the pixel circuit and the light emitting diode in the second light emitting module is convenient and simple in circuit design.

Preferably, the transistors are all P-type thin film transistors.

In this way, using the P-type thin film transistor as the thin film transistor in the pixel circuit is convenient, simple and easy to implement in circuit design.

The display provided by the embodiment of the present invention includes a plurality of pixels, data signal lines and gate control signal lines, wherein every two pixels form a pixel unit, and also includes the above-mentioned pixel circuit connected to each pixel unit.

In this way, since the display includes the above-mentioned pixel circuits connected to each pixel unit, the display has the advantages of the pixel circuits, and can well improve the image display quality.

Preferably, two pixels in each pixel unit share one data signal line.

In this way, two pixels in each pixel unit share one data signal line, so two pixels can omit one data signal line, and the arrangement method of the data signal lines is simple and easy.

Preferably, two pixels in each pixel unit share one gate control signal line.

In this way, two pixels in each pixel unit share one gate control signal line, so two pixels can omit one gate control signal line, and the arrangement method of the gate control signal lines is simple and easy.

Description of drawings

1 is a schematic diagram of a 6T1C AMOLED pixel compensation circuit in a single pixel in the prior art;

2 is a schematic diagram of a 12T2C AMOLED pixel compensation circuit in two pixels in the prior art;

3 is a schematic diagram of a 10T2C AMOLED pixel circuit provided by an embodiment of the present invention;

Fig. 4 is the timing diagram of the 10T2C AMOLED pixel circuit work provided by the embodiment of the utility model;

Fig. 5 is a simplified circuit diagram of the 10T2C AMOLED pixel circuit in the initialization working stage provided by the embodiment of the utility model;

6 is a simplified circuit diagram of the 10T2C AMOLED pixel circuit provided by the embodiment of the present invention in the first threshold compensation stage;

7 is a simplified circuit diagram of the 10T2C AMOLED pixel circuit provided by the embodiment of the present invention in the second threshold compensation stage;

Fig. 8 is a simplified circuit diagram of the 10T2C AMOLED pixel circuit in the light-emitting stage provided by the embodiment of the present invention;

FIG. 9 is a schematic diagram of the arrangement of a single pixel in the prior art;

Fig. 10 is a schematic diagram of a horizontal arrangement of pixel units composed of any two pixels provided by the embodiment of the present invention;

Fig. 11 is a schematic diagram of another horizontal arrangement of pixel units composed of any two pixels provided by the embodiment of the present invention;

Fig. 12 is a schematic diagram of a vertical arrangement of pixel units composed of any two pixels provided by the embodiment of the present invention;

FIG. 13 is a schematic diagram of another vertical arrangement of pixel units composed of any two pixels provided by the embodiment of the present invention.

Detailed ways

The embodiment of the present invention provides a pixel circuit and a display, which are used to reduce the size of the pixel circuit, further reduce the pixel pitch, increase the number of pixels in a unit area, and improve the display quality of the picture.

Among them, the pixel circuit provided by the embodiment of the utility model is an active matrix light-emitting diode pixel circuit. Since the active matrix light-emitting diode pixel circuit can play the role of compensating the driving module of the pixel, the active matrix light emitting diode in the utility model The diode pixel circuit may also be referred to as an active matrix light emitting diode pixel compensation circuit.

A detailed introduction of the technical solutions provided by the embodiments of the present invention is given below.

As shown in Figure 3, an active matrix light-emitting diode pixel circuit provided by an embodiment of the present invention includes: a first pixel sub-circuit and a second pixel sub-circuit, and the first pixel sub-circuit and the second pixel sub-circuit The initialization module 31 and the data voltage writing module 32 connected by the sub-circuit,

The initialization module 31 is connected to a reset signal terminal (corresponding to the AMOLED pixel circuit initialization control signal Reset) and a low potential terminal (corresponding to the AMOLED pixel circuit initialization voltage level signal Vinit), and is used to control the first reset signal under the control of the reset signal input from the reset signal terminal. A pixel sub-circuit and a second pixel sub-circuit are initialized;

The data voltage writing module 32 is connected to the data voltage (corresponding to the data signal Data of the AMOLED pixel circuit) and the gate signal terminal (corresponding to the gate control signal Gate of the AMOLED pixel circuit), and is used to write the first signal under the control of the signal input from the gate signal terminal. A pixel sub-circuit writes the first data voltage, and compensates the driving module of the first pixel sub-circuit, then writes the second data voltage into the second pixel sub-circuit, and compensates the driving module of the second pixel sub-circuit Make compensation.

In the circuit shown in Fig. 3, in order to distinguish between cross-connected and disconnected wires, the connected cross-points are represented by solid circles, and the disconnected cross-points are represented by hollow dots.

Preferably, the first pixel sub-circuit includes: a first driving module 331, a first light emitting module 341, a first threshold compensation module 351 and a first light emitting control module 361,

The first threshold compensation module 351 is connected to the initialization module 31, and is used to initialize the first threshold compensation module 351 under the control of the initialization signal output by the initialization module 31;

The first threshold compensation module 351 is connected to the first driving module 331 for performing threshold voltage compensation on the first driving module 331;

The first light-emitting module 341 is connected to the first driving module 331 and the first light-emitting control module 361 , and is used for light-emitting display under the action of the first driving module 331 and the first light-emitting control module 361 .

Preferably, the first threshold compensation module 351 includes a first storage capacitor C1, a second transistor T2 and a fourth transistor T4; the first driving module 331 includes a fifth transistor T5; the first light emission control module 361 It includes a seventh transistor T7 and a ninth transistor T9; the first light emitting module 341 includes a first light emitting diode OLED1.

Preferably, one end of the first storage capacitor C1 is connected to a high voltage level signal line (corresponding to the high voltage level signal VDD), and the other end is connected to the source of the second transistor T2;

The gate of the second transistor T2 is connected to the first control signal line (corresponding to the first control signal SW1 of the AMOLED pixel circuit), and the drain of the second transistor T2 is connected to the initialization module 31;

The gate of the fourth transistor T4 is connected to the gate signal terminal (corresponding to the AMOLED pixel circuit gate control signal Gate), and the source of the fourth transistor T4 is connected to the initialization module 31;

The gate of the fifth transistor T5 is connected to the initialization module 31, the drain of the fifth transistor T5 is connected to the drain of the fourth transistor T4, and the source of the fifth transistor T5 is connected to the The data voltage writing module 32 is connected;

The gate of the seventh transistor T7 is connected to the light emission control signal line (corresponding to the light emission control signal EM of the AMOLED pixel circuit), and the source of the seventh transistor T7 is connected to the high voltage level signal line (corresponding to the high voltage level signal VDD ), the drain of the seventh transistor T7 is connected to the source of the fifth transistor T5;

The gate of the ninth transistor T9 is connected to the light emission control signal line (corresponding to the light emission control signal EM of the AMOLED pixel circuit), the source of the ninth transistor T9 is connected to the drain of the fifth transistor T5, and the ninth transistor T9 is connected to the drain of the fifth transistor T5. The drain of the nine-transistor T9 is connected to the first light-emitting diode OLED1;

The anode of the first light emitting diode OLED1 is connected to the drain of the ninth transistor T9, and the cathode of the first light emitting diode OLED1 is connected to a low voltage level signal line (corresponding to the low voltage level signal VSS).

Preferably, the second pixel sub-circuit includes a second driving module 332, a second light emitting module 342, a second threshold compensation module 352 and a second light emitting control module 362,

The second threshold compensation module 352 is connected to the initialization module 31, and is used to initialize the second threshold compensation module 352 under the control of the initialization signal output by the initialization module 31;

The second threshold compensation module 352 is connected to the second driving module 332 for performing threshold voltage compensation on the second driving module 332;

The second light-emitting module 342 is connected to the second driving module 332 and the second light-emitting control module 362 , and is used for light-emitting display under the action of the second driving module 332 and the second light-emitting control module 362 .

Preferably, the second threshold compensation module 352 includes a second storage capacitor C2 and an eighth transistor T8; the second driving module 332 includes a sixth transistor T6; the second light emission control module 362 includes a seventh transistor T7 and the tenth transistor T10; the second light emitting module 342 includes a second light emitting diode OLED2.

Preferably, one end of the second storage capacitor C2 is connected to the high voltage level signal line (corresponding to the high voltage level signal VDD), and the other end is connected to the source of the eighth transistor T8;

The gate of the eighth transistor T8 is connected to the second control signal line (corresponding to the second control signal SW2 of the AMOLED pixel circuit), and the drain of the eighth transistor T8 is connected to the initialization module 31 ;

The gate of the seventh transistor T7 is connected to the light emission control signal line (corresponding to the light emission control signal EM of the AMOLED pixel circuit), and the source of the seventh transistor T7 is connected to the high voltage level signal line (corresponding to the high voltage level signal VDD ), the drain of the seventh transistor T7 is connected to the source of the sixth transistor T6;

The gate of the sixth transistor T6 is connected to the source of the eighth transistor T8, the source of the sixth transistor T6 is connected to the data voltage writing module 32, and the drain of the sixth transistor T6 Connected to the second light emitting diode OLED2;

The gate of the tenth transistor T10 is connected to the light emission control signal line (corresponding to the light emission control signal EM of the AMOLED pixel circuit), the source of the tenth transistor T10 is connected to the drain of the sixth transistor T6, and the first The drain of the transistor T10 is connected to the second light emitting diode OLED2;

The anode of the second light emitting diode OLED2 is connected to the drain of the tenth transistor T10 , and the cathode of the second light emitting diode OLED2 is connected to the low voltage level signal line (corresponding to the low voltage level signal VSS).

Wherein, the seventh transistor T7 is a switching transistor shared by the first light emission control module 361 and the second light emission control module 362, and the light emission control modules 361 and 362 can control the light emission of OLED1 and OLED2 at the same time, or separately control the light emission of OLED1 and OLED2 .

Preferably, the initialization module 31 includes a third transistor T3, the gate of the third transistor T3 is connected to the reset signal line (corresponding to the AMOLED pixel circuit initialization control signal Reset), and the source of the third transistor T3 is connected to The first threshold compensation module 351 of the first pixel subcircuit is connected to the second threshold compensation module 352 of the second pixel subcircuit, and the drain of the third transistor T3 is connected to the low voltage level signal line (corresponding to the AMOLED pixel circuit initialization voltage Level signal Vinit) connected.

Preferably, the data voltage writing module 32 includes a first transistor T1, the gate of the first transistor T1 is connected to the gate signal control line (corresponding to the AMOLED pixel circuit gate control signal Gate), and the first transistor T1 The source of T1 is connected to the data signal line (corresponding to the AMOLED pixel circuit data signal Data), and the drain of the first transistor T1 is connected to the first driving module 331 of the first pixel sub-circuit and the second driving module 331 of the second pixel sub-circuit. Module 332 is connected.

Preferably, the data voltage input in the data voltage writing module 32 includes a first data voltage and a second data voltage, wherein the first data voltage is used to drive the first threshold compensation module 351 to perform the first driving module 331 For threshold voltage compensation, the second data voltage is used to drive the second threshold compensation module 352 to perform threshold voltage compensation on the second driving module 332 .

Preferably, both the first light emitting diode OLED1 and the second light emitting diode OLED2 are organic light emitting diodes.

Preferably, the transistors T1 , T2 , T3 , T4 , T5 , T6 , T7 , T8 , T9 and T10 are all P-type thin film transistors.

The working principle of the AMOLED pixel circuit provided by the embodiment of the present invention will be described in detail below with reference to FIGS. 3-8 .

As shown in Figure 4, in the I stage, the grid control signal Gate and the light emission control signal EM are at high level; the initialization control signal Reset, the first control signal SW1 and the second control signal SW2 are at low level, at this time, the The third transistor T3, the second transistor T2 and the eighth transistor T8 in 3 are turned on, and the first transistor T1, the fourth transistor T4, the seventh transistor T7, the ninth transistor T9 and the tenth transistor T10 are turned off, therefore, the The simplified circuit diagram is shown in Figure 5. Since the storage capacitors C1 and C2 respectively store the data signal Data input in the previous frame, at this time, the two capacitors are all connected to the initialization voltage level signal Vinit with a low potential, and the storage capacitors C1 and C2 are both sensitive to the initialization voltage level signal. Vinit is discharged to the initialization voltage _Vinit .

As shown in Figure 4, in the II phase, the initialization control signal Reset, the second control signal SW2 and the light emission control signal EM are at high level; the gate control signal Gate and the first control signal SW1 are at low level, at this time, the 3, the first transistor T1, the second transistor T2 and the fourth transistor T4 are turned on; the third transistor T3, the eighth transistor T8, the seventh transistor T7, the ninth transistor T9 and the tenth transistor T10 are turned off, therefore, the A simplified circuit diagram is shown in Figure 6. The data level signal Data inputs the first data voltage value V1, at this time the fifth transistor T5 is equivalent to a diode, and the voltage of the first node P1 becomes: V=V1-Vth(T5), where Vth(T5) is the fifth The threshold voltage of the transistor T5, and store the voltage value V in the storage capacitor C1.

As shown in Figure 4, in the III stage, the initialization control signal Reset, the first control signal SW1 and the light emission control signal EM are at high level; the gate control signal Gate and the second control signal SW2 are at low level, at this time, the The first transistor T1, the fourth transistor T4 and the eighth transistor T8 in 3 are turned on; the second transistor T2, the third transistor T3, the seventh transistor T7, the ninth transistor T9 and the tenth transistor T10 are turned off, therefore, the The simplified circuit diagram is shown in Figure 7. The data level signal Data is input to the second data voltage value V2, at this time the fifth transistor T5 is equivalent to a diode, and the voltage of the first node P1 becomes: V'=V2-Vth(T5), where Vth(T5) is the first The threshold voltage of the five-transistor T5, in the design, the parameters of the fifth transistor T5 and the sixth transistor T6 are exactly the same, and they are placed close to each other. It can be approximately considered that Vth(T5)=Vth(T6), and Vth(T6) is the sixth The threshold voltage of the transistor T6, then the voltage value V'=V2-Vth (T6), and the voltage value V' is stored in the storage capacitor C2.

As shown in Figure 4, in the IV stage, that is, the light-emitting stage, the initialization control signal Reset, the gate control signal Gate, and the second control signal SW2 are at a high level; the first control signal SW1 and the light-emitting control signal EM are at a low level, and this , the second transistor T2, the seventh transistor T7, the ninth transistor T9 and the tenth transistor T10 in FIG. 3 are turned on, and the first transistor T1, the third transistor T3, the fourth transistor T4 and the eighth transistor T8 are turned off. Therefore, A simplified circuit diagram of Figure 3 is shown in Figure 8. The fifth transistor T5 and the sixth transistor T6 are the driving transistors of the OLED, and their current control methods are as follows:

Both the sources of the fifth transistor T5 and the sixth transistor T6 are connected to the high-voltage level signal VDD, and the current flowing through the first light-emitting diode OLED1 is:

$\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="ID"\; filenames="HDA0000378538620000021.png,HDA0000378538620000031.png"\; state="\{\{state\}\}">ID</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="k"\; filenames="HDA0000378538620000021.png,HDA0000378538620000031.png"\; state="\{\{state\}\}">k</figure-callout></span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; *</span>{<span\; class="notranslate">\; [</span>\mathrm{<span\; class="notranslate">\; VDD</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; V</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; Vth</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; T</span>}\mathrm{<span\; class="notranslate">\; 5</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ]</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="k"\; filenames="HDA0000378538620000021.png,HDA0000378538620000031.png"\; state="\{\{state\}\}">k</figure-callout></span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; *</span>{<span\; class="notranslate">\; [</span>\mathrm{<span\; class="notranslate">\; VDD</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; V</span>}\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; Vth</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; T</span>}\mathrm{<span\; class="notranslate">\; 5</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; Vth</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; T</span>}\mathrm{<span\; class="notranslate">\; 5</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ]</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="k"\; filenames="HDA0000378538620000021.png,HDA0000378538620000031.png"\; state="\{\{state\}\}">k</figure-callout></span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; *</span>{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; VDD</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; V</span>}\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; ,</span>$

Wherein, k is a preset constant, and the current flowing through the second light emitting diode OLED2 is:

$\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="ID"\; filenames="HDA0000378538620000021.png,HDA0000378538620000031.png"\; state="\{\{state\}\}">ID</figure-callout></span>}\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="k"\; filenames="HDA0000378538620000021.png,HDA0000378538620000031.png"\; state="\{\{state\}\}">k</figure-callout></span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; *</span>{<span\; class="notranslate">\; [</span>\mathrm{<span\; class="notranslate">\; VDD</span>}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; V</span>}}^{<span\; class="notranslate">\; \&prime;</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; Vth</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; T</span>}\mathrm{<span\; class="notranslate">\; 6</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ]</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="k"\; filenames="HDA0000378538620000021.png,HDA0000378538620000031.png"\; state="\{\{state\}\}">k</figure-callout></span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; *</span>{<span\; class="notranslate">\; [</span>\mathrm{<span\; class="notranslate">\; VDD</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; V</span>}\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; Vth</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; T</span>}\mathrm{<span\; class="notranslate">\; 6</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; Vth</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; T</span>}\mathrm{<span\; class="notranslate">\; 6</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; ]</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; <figure-callout\; id="2"\; label="k"\; filenames="HDA0000378538620000021.png,HDA0000378538620000031.png"\; state="\{\{state\}\}">k</figure-callout></span>}}{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; *</span>{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; VDD</span>}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; V</span>}\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; ,</span>$

It can be seen from the above equation that the current Id1 flowing through the first light emitting diode OLED1 and the current Id2 flowing through the second light emitting diode OLED2 are related to the threshold voltage Vth (T5) of the fifth transistor T5 and the threshold voltage Vth of the sixth transistor T6 (T6) has nothing to do, so it can play a compensating role.

In summary, the AMOLED pixel circuit provided by the embodiment of the present invention includes 10 thin film transistors and 2 capacitors, which is a 10T2C AMOLED pixel circuit.

A display provided by an embodiment of the present invention includes a plurality of pixels, data signal lines and gate control signal lines, wherein every two pixels form a pixel unit, and also includes a display unit connected to each pixel unit. Provided 10T2C AMOLED pixel circuit.

The following describes in detail the arrangement of pixel units containing 2 pixels:

The pixel arrangement of a single pixel in the prior art is shown in Figure 9. The compensation circuit in a single pixel is a 6T1C AMOLED pixel compensation circuit in the prior art. If two pixels are put together to form a pixel unit, the current The compensation circuit of the pixel unit in the prior art is the 12T2CAMOLED pixel compensation circuit in the prior art.

The arrangement of pixel units containing 2 pixels provided by the embodiment of the present invention is shown in Figure 10-13, wherein two pixels in any pixel unit arranged in the horizontal direction share one data signal line Data(m), Two pixels in any pixel unit arranged in the vertical direction share a gate control signal line Gate (N), wherein the two pixels in any pixel unit arranged in the horizontal direction are any two pixels in the horizontal direction, For example: pixel (Pixel) 1 and Pixel2 or Pixel2 and Pixel3, the two pixels arranged in the vertical direction in the pixel unit are any two pixels in the vertical direction.

As shown in Figures 10 and 11, the two pixels in any pixel unit arranged in the horizontal direction share one data signal line Data (m), including: the data signal line Data (m) runs through the two Pixel1 and Pixel2, or the data signal line Data(m) is located in the side direction of Pixel1 among the two horizontally arranged Pixel1 and Pixel2, of course, the data signal line Data(m) in the embodiment of the present invention is not limited to the side direction of Pixel1 , can be located in the lateral direction of any one of the two pixels arranged in the horizontal direction.

As shown in Figures 12 and 13, the two pixels in any pixel unit arranged in the vertical direction share one gate control signal line Gate (N), including: the gate control signal line Gate (N) runs through the A pixel unit composed of any two pixels or a gate control signal line Gate (N) is located in a side direction of any pixel in a pixel unit composed of any two pixels arranged in the vertical direction.

To sum up, in the technical solution provided by the embodiment of the present invention, the AMOLED pixel circuit includes: a first pixel sub-circuit and a second pixel sub-circuit, and the first pixel sub-circuit and the second pixel sub-circuit Connected initialization module and data voltage writing module, the initialization module is connected to the reset signal terminal and the low potential terminal, and is used to initialize the first pixel sub-circuit and the second pixel sub-circuit under the control of the reset signal input from the reset signal terminal The data voltage writing module is connected to the data voltage and the gate signal terminal, and is used to first write the first data voltage to the first pixel sub-circuit under the control of the signal input from the gate signal terminal, and then write the first data voltage to the second pixel sub-circuit. The second data voltage; the first pixel sub-circuit compensates the driving module of the first pixel, and the second pixel sub-circuit compensates the driving module of the second pixel. The AMOLED pixel circuit can reduce the size of the pixel circuit, thereby reducing The pixel pitch increases the number of pixels per unit area and improves the display quality of the screen.

Obviously, those skilled in the art can make various changes and modifications to the utility model without departing from the spirit and scope of the utility model. In this way, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and equivalent technologies thereof, the utility model is also intended to include these modifications and variations.

Claims (15)

1. an image element circuit, is characterized in that, comprising: the first pixel electronic circuit and the second pixel electronic circuit, and the initialization module and the data voltage writing module that are connected with the second pixel electronic circuit with described the first pixel electronic circuit,

Described initialization module connects reset signal end and cold end, under controlling in the reset signal of reset signal end input, the first pixel electronic circuit and the second pixel electronic circuit is carried out to initialization;

Described data voltage writing module connection data voltage and gate signal end, for first the first pixel electronic circuit being write to the first data voltage under the signal controlling in the input of gate signal end, and the driver module of described the first pixel electronic circuit is compensated, then the second pixel electronic circuit is write to the second data voltage, and the driver module of the second pixel electronic circuit is compensated.

2. circuit according to claim 1, is characterized in that, described the first pixel electronic circuit comprises the first driver module, the first light emitting module, first threshold compensating module and the first light emitting control module,

Described first threshold compensating module connection initialization module is carried out initialization to first threshold compensating module under controlling at the initializing signal of initialization module output;

Described first threshold compensating module connects the first driver module, for the first driver module is carried out to threshold voltage compensation;

Described the first light emitting module connects the first driver module and the first light emitting control module, for carry out luminescence display under the first driver module and the first light emitting control module effect.

3. circuit according to claim 2, is characterized in that, described first threshold compensating module comprises the first memory capacitance, transistor seconds and the 4th transistor; Described the first driver module comprises the 5th transistor; Described the first light emitting control module comprises the 7th transistor and the 9th transistor; Described the first light emitting module comprises the first light emitting diode.

4. circuit according to claim 3, is characterized in that, one end of described the first memory capacitance is connected with high-voltage level signal wire, and the other end is connected with the source electrode of transistor seconds;

The grid of described transistor seconds is connected with the first control signal wire, and the drain electrode of described transistor seconds is connected with described initialization module;

Described the 4th transistorized grid is connected with gate signal end, and described the 4th transistorized source electrode is connected with described initialization module;

Described the 5th transistorized grid is connected with described initialization module, and described the 5th transistorized drain electrode is connected with described the 4th transistorized drain electrode, and described the 5th transistorized source electrode is connected with described data voltage writing module;

Described the 7th transistorized grid is connected with LED control signal line, and described the 7th transistorized source electrode is connected with high-voltage level signal wire, and described the 7th transistorized drain electrode is connected with the 5th transistorized source electrode;

Described the 9th transistorized grid is connected with LED control signal line, and described the 9th transistorized source electrode is connected with described the 5th transistorized drain electrode, and described the 9th transistorized drain electrode is connected with the first light emitting diode;

The anode of described the first light emitting diode is connected with the 9th transistorized drain electrode, and the negative electrode of described the first light emitting diode is connected with low voltage level signal wire.

5. circuit according to claim 4, is characterized in that, described the second pixel electronic circuit comprises the second driver module, the second light emitting module, Second Threshold compensating module and the second light emitting control module,

Described Second Threshold compensating module connection initialization module is carried out initialization to Second Threshold compensating module under controlling at the initializing signal of initialization module output;

Described Second Threshold compensating module connects the second driver module, for the second driver module is carried out to threshold voltage compensation;

Described the second light emitting module connects the second driver module and the second light emitting control module, for carry out luminescence display under the second driver module and the second light emitting control module effect.

6. circuit according to claim 5, is characterized in that, described Second Threshold compensating module comprises the second memory capacitance and the 8th transistor; Described the second driver module comprises the 6th transistor; Described the second light emitting control module comprises the 7th transistor and the tenth transistor; Described the second light emitting module comprises the second light emitting diode.

7. circuit according to claim 6, is characterized in that, one end of described the second memory capacitance is connected with high-voltage level signal wire, and the other end is connected with the 8th transistorized source electrode;

Described the 8th transistorized grid is connected with the second control signal wire, and described the 8th transistorized drain electrode is connected with described initialization module;

Described the 7th transistorized grid is connected with LED control signal line, and described the 7th transistorized source electrode is connected with high-voltage level signal wire, and described the 7th transistorized drain electrode is connected with the 6th transistorized source electrode;

Described the 6th transistorized grid is connected with described the 8th transistorized source electrode, and described the 6th transistorized source electrode is connected with described data voltage writing module, and described the 6th transistorized drain electrode is connected with the second light emitting diode;

Described the tenth transistorized grid is connected with LED control signal line, and described the tenth transistorized source electrode is connected with described the 6th transistorized drain electrode, and described the tenth transistorized drain electrode is connected with the second light emitting diode;

The anode of described the second light emitting diode is connected with the tenth transistorized drain electrode, and the negative electrode of described the second light emitting diode is connected with low voltage level signal wire.

8. circuit according to claim 7, it is characterized in that, described initialization module comprises the 3rd transistor, described the 3rd transistorized grid is connected with reseting signal line, described the 3rd transistorized source electrode is connected with the Second Threshold compensating module of the second pixel electronic circuit with the first threshold compensating module of the first pixel electronic circuit, and described the 3rd transistorized drain electrode is connected with low voltage level signal wire.

9. circuit according to claim 7, it is characterized in that, described data voltage writing module comprises the first transistor, the grid of described the first transistor is connected with gate signal control line, the source electrode of described the first transistor is connected with data signal line, and the drain electrode of described the first transistor is connected with the second driver module of the second pixel electronic circuit with the first driver module of the first pixel electronic circuit.

10. circuit according to claim 9, it is characterized in that, the data voltage of inputting in described data voltage writing module comprises the first data voltage and the second data voltage, wherein, the first data voltage is used for driving first threshold compensating module to carry out threshold voltage compensation to the first driver module, and the second data voltage is used for driving Second Threshold compensating module to carry out threshold voltage compensation to the second driver module.

11. circuit according to claim 7, is characterized in that, described the first light emitting diode and the second light emitting diode are Organic Light Emitting Diode.

12. according to the circuit described in the arbitrary claim of claim 3-11, it is characterized in that, described transistor is P type thin film transistor (TFT).

13. 1 kinds of displays, comprise a plurality of pixels, data signal line and grid control signal line, it is characterized in that, every two pixels form a pixel cell, also comprise the image element circuit described in the arbitrary claim of the claim 1-12 being connected with each pixel cell.

14. displays according to claim 13, is characterized in that, two pixels in described each pixel cell share a data signal line.

15. according to the display described in claim 14 or 13, it is characterized in that, two pixels in described each pixel cell share a grid control signal line.

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