Pixel circuit, organic electroluminescent display panel and display device

Abstract

The invention discloses a pixel circuit, an organic electroluminescent display panel and a display device. The pixel circuit is characterized in that a first node is initialized in the initializing time periods of a touch control phase and a display phase; the voltage of the first node is regulated in the touch control induction time period; a driving module is enabled to output a corresponding touch control signal under the control of the voltage of the first node in the touch control reading time period for realizing a touch control function; data writing is performed on the first node in the compensation and data writing time period of the display phase; the driving module is enabled to drive a light emitting device in a light emitting module to emit light in a light emitting time period for realizing the normal light emitting function of the light emitting device. Thus, compared with a traditional pixel circuit, the pixel circuit provided by the embodiment of the invention integrates the touch control function and a display function, so that the manufacturing cost of respectively arranging a display driving circuit and a touch control circuit can be reduced; the circuit structure is simplified; and the thickness of the display panel can also be reduced.

Description

technical field

[0001] The invention relates to the field of display technology, in particular to a pixel circuit, an organic electroluminescent display panel and a display device. Background technique

[0002] With the advancement of display technology, organic light-emitting display (OLED, Organic Light Emitting Diode) is one of the hot spots in the field of flat panel display research today, and more and more active matrix organic light-emitting diodes (AMOLED, Active Matrix Organic Light Emitting Diode) Display panels have entered the market. Compared with traditional thin film transistor liquid crystal display panels (TFT LCD, Thin Film Transistor Liquid Crystal Display), AMOLED has faster response speed, higher contrast ratio and wider viewing angle.

[0003] At present, as display devices are developing toward thinner, lighter, higher-resolution, intelligent, and energy-saving devices, touch screen panels (Touch Screen Panels) are more and more widely used. At presen...

Examples

Embodiment 1

[0057] Example 1: Combining Figure 2a The pixel circuit shown as well as Figure 3a shown Figure 2a The input and output timing diagrams describe the working process of the pixel circuit provided by the embodiment of the present invention. Specifically, choose the Figure 3a There are seven stages of t1-t7 in the input and output sequence diagram shown. In the following description, 1 represents a high-level signal, and 0 represents a low-level signal.

[0058] In the t1 stage, CT1=1, CT2=1, CT3=0, CT4=0, CT5=1, Scan=1, Ref1=Vini, Ref2=0, Data=VL. Because CT1=1, CT2=1, CT5=1, Scan=1, so the first switch transistor T1, the second switch transistor T2, the third switch transistor T3 and the sixth switch transistor T6 conduction; Because CT3=0, CT4 =0, so the fourth switching transistor T4 and the fifth switching transistor T5 are turned off. The turned-on sixth switch transistor T6 conducts the drain of the driving transistor D1 with the second reference signal terminal ...

Embodiment 2

[0066] Embodiment 2: Combination Figure 2c The pixel circuit shown as well as Figure 3b shown Figure 2c The input and output timing diagrams describe the working process of the pixel circuit provided by the embodiment of the present invention. Specifically, choose the Figure 3b There are seven stages of t1-t7 in the input and output sequence diagram shown. In the following description, 1 represents a high-level signal, and 0 represents a low-level signal.

[0067]In the t1 stage, CT1=0, CT2=0, CT3=1, CT4=1, CT5=0, Scan=0, Ref1=Vini, Ref2=1, Data=VL. Because CT1=0, CT2=0, CT5=0, Scan=0, so the first switch transistor T1, the second switch transistor T2, the third switch transistor T3 and the sixth switch transistor T6 conduction; Because CT3=1, CT4 =1, so the fourth switching transistor T4 and the fifth switching transistor T5 are turned off. The turned-on sixth switch transistor T6 conducts the drain of the driving transistor D1 with the second reference signal termi...

technical field

[0001] The invention relates to the field of display technology, in particular to a pixel circuit, an organic electroluminescent display panel and a display device. Background technique

[0002] With the advancement of display technology, organic light-emitting display (OLED, Organic Light Emitting Diode) is one of the hot spots in the field of flat panel display research today, and more and more active matrix organic light-emitting diodes (AMOLED, Active Matrix Organic Light Emitting Diode) Display panels have entered the market. Compared with traditional thin film transistor liquid crystal display panels (TFT LCD, Thin Film Transistor Liquid Crystal Display), AMOLED has faster response speed, higher contrast ratio and wider viewing angle.

[0003] At present, as display devices are developing toward thinner, lighter, higher-resolution, intelligent, and energy-saving devices, touch screen panels (Touch Screen Panels) are more and more widely used. At presen...

Examples

Embodiment 1

[0057] Example 1: Combining Figure 2a The pixel circuit shown as well as Figure 3a shown Figure 2a The input and output timing diagrams describe the working process of the pixel circuit provided by the embodiment of the present invention. Specifically, choose the Figure 3a There are seven stages of t1-t7 in the input and output sequence diagram shown. In the following description, 1 represents a high-level signal, and 0 represents a low-level signal.

[0058] In the t1 stage, CT1=1, CT2=1, CT3=0, CT4=0, CT5=1, Scan=1, Ref1=Vini, Ref2=0, Data=VL. Because CT1=1, CT2=1, CT5=1, Scan=1, so the first switch transistor T1, the second switch transistor T2, the third switch transistor T3 and the sixth switch transistor T6 conduction; Because CT3=0, CT4 =0, so the fourth switching transistor T4 and the fifth switching transistor T5 are turned off. The turned-on sixth switch transistor T6 conducts the drain of the driving transistor D1 with the second reference signal terminal ...

Embodiment 2

[0066] Embodiment 2: Combination Figure 2c The pixel circuit shown as well as Figure 3b shown Figure 2c The input and output timing diagrams describe the working process of the pixel circuit provided by the embodiment of the present invention. Specifically, choose the Figure 3b There are seven stages of t1-t7 in the input and output sequence diagram shown. In the following description, 1 represents a high-level signal, and 0 represents a low-level signal.

[0067]In the t1 stage, CT1=0, CT2=0, CT3=1, CT4=1, CT5=0, Scan=0, Ref1=Vini, Ref2=1, Data=VL. Because CT1=0, CT2=0, CT5=0, Scan=0, so the first switch transistor T1, the second switch transistor T2, the third switch transistor T3 and the sixth switch transistor T6 conduction; Because CT3=1, CT4 =1, so the fourth switching transistor T4 and the fifth switching transistor T5 are turned off. The turned-on sixth switch transistor T6 conducts the drain of the driving transistor D1 with the second reference signal termi...

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