Pixel Driving Circuit Brightness Consistency
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Solution Overview
Problem
In display devices, the presence of cameras hidden in the display area requires a lower pixel density to increase light transmittance, leading to inconsistent display brightness between high and low pixel density areas due to differing pixel densities.
Innovation Solution
A pixel driving circuit with multiple driving transistors, capacitors, and a specific transistor configuration that allows for improved current input to the first node, enhancing light-emitting brightness without altering the size of the driving transistor or voltage, ensuring consistent brightness across different pixel density areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the pixel density is reduced to increase light transmittance for camera function, then the light transmittance is improved, but the display brightness becomes inconsistent between high and low pixel density areas
Solution Approach 1:
The patent applies local quality by configuring different numbers of driving transistors in different pixel density areas. Specifically, pixels in the first area (higher pixel density) are configured with a first number of driving transistors, while pixels in the second area (lower pixel density) are configured with a second number of driving transistors. This local differentiation allows each area to have optimized display brightness according to its specific pixel density characteristics, thereby maintaining overall display brightness consistency across the display panel while preserving the light transmittance required for camera function in the second area.
2Illumination intensity
If the number of driving transistors is increased to improve display brightness, then the display brightness is improved, but the device complexity increases
Solution Approach 1:
The patent applies parameter changes by varying the number of driving transistors (a key circuit parameter) according to the pixel density area. Instead of using a fixed circuit configuration throughout the display panel, the invention dynamically adjusts the transistor count parameter: pixels in the first area use a first number of driving transistors while pixels in the second area use a second number of driving transistors. This parameter adaptation allows the circuit to achieve appropriate display brightness in each area without unnecessarily increasing complexity across the entire panel, as each local area uses only the transistor count needed for its specific requirements.
Data Source
AI summary
The present disclosure relates to the field of display technology, and proposes a pixel driving circuit, a pixel structure, and a display panel. The pixel driving circuit includes a plurality of driving transistors. For each driving transistor the first terminal is connected to a first power terminal, the second terminal is connected to a first node, and the control terminal is connected to a second node, so as to input current to the first node under the effect of the voltage at the second node. The low pixel density area of the display panel can be provided with the above-mentioned pixel driving circuit, so that the brightness difference between the low pixel density area and the high pixel density area can be avoided.