Pixel driving circuit, driving method thereof and display device
A technology of pixel driving circuit and driving transistor, which is applied to static indicators, instruments, etc., can solve the problems of affecting display effect and uneven display brightness of display devices.
Active Publication Date: 2020-01-24
XIAMEN TIANMA MICRO ELECTRONICS
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Problems solved by technology
Since the switching transistor is connected to the gate of the driving transistor, the existence of the coupling capacitance of the switching transistor will affect the magnitude of the gate voltage of the driving transistor. When the gate voltage of the driving transistor changes, there may be a Influenced by the driving current of the driving transistor, there is a deviation between the driving current actually generated by the driving transistor and the preset driving current, which in turn leads to uneven display brightness of the display device and affects the display effect.
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[0033] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
[0034] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.
[0035] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the description.
[0036] In all examples shown and discussed herein, any specific values should be construed as exemplary only, and not as limitations. Therefore, other instances of the exemplary embodiment may have dif...
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The invention discloses a pixel driving circuit, a driving method thereof and a display device. A pixel driving circuit relates to the technical field of display and comprises a first power supply signal end, a second power supply signal end and a driving transistor, a grid electrode of the driving transistor is connected to a first node, a first electrode of the driving transistor is connected with a second node, and a second electrode of the driving transistor is connected with a third node; a light emitting element; a light emission control module; the first end of the storage module is electrically connected with the first power supply signal end, and the second end of the storage module is electrically connected with the first node; wherein the first end of the switching transistor module is connected with a first node, at least part of the switching transistor module comprises two sub-transistors which are connected in series, the polarities of the two sub-transistors are opposite, and the two sub-transistors are switched on or switched off at the same time under the control of a control signal in the same time frame. Therefore, the display brightness uniformity of the display device can be improved.
Description
technical field [0001] The present invention relates to the field of display technology, and more specifically, to a pixel driving circuit, a driving method thereof, and a display device. Background technique [0002] Organic light-emitting display devices have the advantages of self-luminescence, low driving voltage, high luminous efficiency, fast response speed, thinness, and high contrast, and are considered to be the most promising display devices for the next generation. [0003] A pixel in an organic light-emitting display device includes a pixel driving circuit, a driving transistor in the pixel driving circuit can generate a driving current, and a light emitting element emits light in response to the driving current, wherein the driving current generated by the driving transistor is connected to the gate electrode and the source electrode of the driving transistor The voltage between them is related. The pixel drive circuit usually also includes a switch transistor ...
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Login to View More IPC IPC(8): G09G3/3208
CPCG09G3/3208G09G2320/0233
Inventor 李杰良黄婉铭
Owner XIAMEN TIANMA MICRO ELECTRONICS