Display Device Emission Control Signal Segmentation
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Solution Overview
Problem
Existing organic light-emitting display devices face challenges in achieving uniform luminance and contrast due to differences in charge initialization across pixels, leading to variations in light emission and reduced display quality, especially as resolution and size increase.
Innovation Solution
The display device employs a configuration with first and second emission control lines and an initialization control line, where emission control signals are concurrently supplied to alternate pixel rows, and initialization power is simultaneously applied to anode electrodes, ensuring synchronized light emission and reducing the load on the display driver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If emission control signals are supplied sequentially to all pixels, then the display driver can maintain lower complexity, but luminance uniformity deteriorates due to charge initialization differences across pixels
Solution Approach 1:
The pixel array is divided into first pixels and second pixels, with separate emission control lines (first emission control line and second emission control line) supplied to each group. This segmentation allows independent control of emission timing for different pixel groups, ensuring uniform charge initialization and luminance across all pixels while managing driver complexity through organized signal distribution.
2Manufacturing precision
If resolution and display size are increased, then display quality improves, but the current load on the display driver increases, risking driver malfunction
Solution Approach 1:
By segmenting the pixel array into first pixels and second pixels with separate emission control lines, the total current load on the display driver is distributed across multiple lines. Each emission control line carries current to only a portion of the pixels, reducing the peak current demand on any single driver line while supporting higher resolutions and larger display sizes.
3Reliability
If emission control signals are supplied concurrently to all pixels, then luminance uniformity improves, but the display driver experiences excessive current load
Solution Approach 1:
The pixel array is divided into first pixels and second pixels, with separate emission control lines supplied to each group. This segmentation allows concurrent emission control signal supply to multiple pixel groups simultaneously, improving luminance uniformity across the display, while distributing the current load across multiple lines to prevent driver malfunction.
Data Source
AI summary
Provided herein may be a display device and a method of driving the display device. The display device may include pixels including first pixels and second pixels in a pixel area, scan lines coupled with the pixels, and configured to supply scan signals to the pixels, a first emission control line coupled to the first pixels, and configured to supply a first emission control signal to the first pixels, a second emission control line coupled to the second pixels, and configured to supply a second emission control signal to the second pixels, and a display driver configured to supply the first emission control signal to the first emission control line before supplying the second emission control signal to the second emission control line.