OLED Display Panel Dummy Sub-Pixel Load Balancing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In OLED display panels, the non-uniform load distribution across reset signal lines leads to inconsistent display brightness due to differing loads between the first row and subsequent rows of pixels, causing uneven light emission.
Innovation Solution
Incorporating a non-display region with dummy sub-pixels that mirror the connection structure of the display region, ensuring that the control terminals of reset transistors in the first row receive signals from the same source as those in other rows, thereby equalizing the load on reset signal lines and enhancing uniformity in display brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the first row of sub-pixels uses a different signal source for reset transistors compared to subsequent rows, then the circuit design is simpler, but the display brightness uniformity deteriorates
Solution Approach 1:
The display panel is divided into a display region and a non-display region. The non-display region contains dummy sub-pixels that are electrically connected to the first row of sub-pixels in the display region, creating separate signal paths that ensure uniform load distribution across all reset signal lines without complicating the main display circuitry.
Solution Approach 2:
Dummy sub-pixels act as intermediary elements between the signal source and the first row of sub-pixels. These dummy sub-pixels have the same electrical connection structure as real sub-pixels but do not emit light, serving solely to balance the load on reset signal lines and ensure uniform brightness across the display.
2Manufacturing precision
If dummy sub-pixels are added in the non-display region, then the load distribution on reset signal lines is equalized, but the device structure becomes more complex
Solution Approach 1:
The dummy sub-pixels in the non-display region are designed with the same electrical connection structure as the real sub-pixels in the display region. This copying approach ensures that the load characteristics are identical, achieving uniform load distribution while maintaining design consistency and simplifying the overall structural planning.
Solution Approach 2:
Instead of modifying the display region structure to achieve load balance, the solution extends into the non-display region dimension. By placing dummy sub-pixels in this additional spatial dimension, the patent achieves load equalization without disrupting the compact design of the active display area.
Data Source
AI summary
The present disclosure discloses a display panel and a display apparatus. The display panel includes a display region and a non-display region surrounding the display region. The display region includes: a plurality of sub-pixels disposed in an array, and each sub-pixel includes a pixel circuit and a light emitting device. A control terminal of anode reset transistor is electrically connected with a control terminal of reset transistors in the next row of sub-pixels. The non-display region includes: a row of dummy sub-pixels, the dummy sub-pixels correspond to columns of sub-pixels in one to one correspondence, each dummy sub-pixel includes a dummy pixel circuit and a dummy light emitting device, and the dummy light emitting device does not emit light. and a control terminal of the dummy anode reset transistor is electrically connected with a control terminal of reset transistor in a first row of sub-pixels correspondingly.