Display panel, pixel driving circuit and pixel driving method
A pixel drive circuit and display panel technology, applied to static indicators, instruments, etc., can solve the problems of organic light-emitting diode 106 attenuation, on-current IOLED drop, thin-film transistor critical voltage shift, etc., to achieve high color saturation, Low power consumption, high-resolution effects
Active Publication Date: 2015-07-29
INNOCOM TECH (SHENZHEN) CO LTD +1
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Problems solved by technology
In this way, the conduction current IOLED will decrease after long-term use, because Vgs=Vdata-VOLED0
This phenomenon makes it impossible for the data signal Vdata to make the organic light emitting diode 106 produce a predetermined luminance, that is to say, the overall display luminance of the display screen will decrease.
[0005] Therefore, there is an urgent need for a pixel driving circuit and a pixel driving method to solve the problems of the threshold voltage shift of the thin film transistor and the attenuation of the organic light emitting diode 106
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[0059] The following description is of the best mode for carrying out the invention. Those skilled in the art should be able to understand that some modifications, substitutions and substitutions can be made without departing from the spirit and structure of the present invention. The scope of the present invention should depend on the scope of the appended patent application.
[0060] image 3 It is an embodiment of the pixel driving circuit 300 of the present disclosure. Such as image 3 As shown, the pixel driving circuit 300 is used to generate a driving current Id to a light emitting element ED, so that the light emitting element ED emits light according to the driving current Id. In the disclosed embodiment, the light emitting element ED is an organic light emitting diode (Organic Light Emitting Diode, OLED). The pixel driving circuit 300 includes switching elements T1 - T5 and capacitors C1 - C2 . In the disclosed embodiment, the switching elements T1-T5 may be amo...
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The invention discloses a displaying panel, a pixel driving circuit and a pixel driving method. The pixel driving circuit comprises a first switch element, a second switch element, a third switch element and a fourth switch element. The first switch element is provided a first terminal and a control terminal, wherein the first terminal is coupled to a power source voltage, and the control terminal is coupled to a first scanning signal line. The second switch element is provided with a first terminal, a second terminal, a light-emitting element and a control terminal, wherein the first terminal is coupled to a second terminal of the first switch element, the second terminal is coupled to a first nodal point, and the control terminal is coupled to a second nodal point. The third switch element is provided with a first terminal, a second terminal and a control terminal, wherein the first terminal is coupled to the second nodal point, the second terminal is coupled between the first terminal of the second switch element and the second terminal of the first switch element, and the control terminal is coupled to a second scanning signal line. The fourth switch element is provided with a first terminal, a second terminal and a control terminal, wherein the first terminal is coupled to a data signal line, the second terminal is coupled to the first nodal point, and the control terminal is coupled to a third scanning signal line.
Description
technical field [0001] The present disclosure relates to a panel display, in particular to a pixel driving circuit. Background technique [0002] A pixel of an Organic Light Emitting Display (Organic Light Emitting Display) generally uses a thin film transistor (Thin Film Transistor, TFT) with a storage capacitor to store charges to control the brightness of the Organic Light Emitting Diode (OLED). Please refer to figure 1 , which is a schematic diagram of a conventional pixel circuit. The pixel circuit 100 includes an (N-type) thin film transistor 102 , a storage capacitor 104 and an organic light emitting diode 106 as an example for illustration. Both ends of the storage capacitor 104 are connected between the gate G and the source S of the thin film transistor 102 , and the voltage across the capacitor is denoted as Vgs. The anode of the organic light emitting diode 106 is coupled to the source S of the thin film transistor 102 , and its potential is marked as VOLED. ...
Claims
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IPC IPC(8): G09G3/32G09G3/3266
Inventor 林志隆郭品彦洪嘉泽张富杰
Owner INNOCOM TECH (SHENZHEN) CO LTD