Partitioned Display Panel Pulse Timing for Uniform Emission
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Solution Overview
Problem
Conventional self-light-emitting display panels suffer from large voltage drops on power signal lines and poor display uniformity due to concentrated light-emitting regions far from the power supply terminal, leading to significant brightness variations with distance.
Innovation Solution
The display panel is divided into multiple partitions, with overlapping enabling level pulses in the light-emitting control signals across different partitions to reduce the distance to the power supply and minimize voltage drops, ensuring uniform light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If sub pixels are concentrated in a same light-emitting region, then the light-emitting control is simplified, but the voltage drop on power signal lines increases and display uniformity deteriorates
Solution Approach 1:
The display panel is divided into multiple partitions along the first direction, with each partition containing pixel circuits that receive light-emitting control signals. This segmentation distributes the light-emitting regions across different partitions, reducing the distance from power supply terminals and minimizing voltage drops while maintaining controlled light-emitting operation.
2Area of stationary object
If light-emitting region is far from power supply terminal, then the display area is expanded, but the voltage drop on power signal lines increases
Solution Approach 1:
By segmenting the display panel into multiple partitions along the first direction, the invention creates multiple light-emitting regions distributed across different partitions. This reduces the average distance from power supply terminals to light-emitting regions, minimizing voltage drops while expanding the overall display area.
Solution Approach 2:
Different partitions are configured with pixel circuits receiving light-emitting control signals independently, creating locally optimized light-emitting regions. Each partition can be controlled to emit light at different times or intensities, reducing the distance to power supply terminals and minimizing voltage drops in each local region.
3Measurement precision
If multiple enabling level pulses are used in target subframe, then the light-emitting control precision is improved, but the device complexity increases
Solution Approach 1:
The light-emitting control signal includes multiple enabling level pulses (first enabling level pulse, second enabling level pulse, etc.) that periodically activate pixel circuits in different partitions. This periodic action allows precise control of light-emitting timing and duration, improving control precision while managing complexity through systematic pulse sequencing.
Solution Approach 2:
The control signal is pre-configured with multiple enabling level pulses at specific timing intervals before the actual light-emitting operation. This preliminary action allows the system to prepare and sequence the activation of different partitions, improving control precision without increasing real-time processing complexity.
Data Source
AI summary
A display panel and a display device are provided. One screen display period of the display panel includes N subframes. At least one of the N subframe serves as a target subframe. The display panel at least includes a first partition and a second partition. The partition includes at least one pixel circuit. In the target subframe, a p-th enabling level pulse of a light-emitting control signal received by a pixel circuit in the first partition and a q-th enabling level pulse of a light-emitting control signal received by a pixel circuit in the second partition overlap at least partially in time. p≠q, 1≤p≤M, 1≤q≤M, and p and q are integers.