Display Device Switch Unit for Non-Display Area Reduction
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Solution Overview
Problem
Conventional display devices face challenges in reducing the size of non-display areas while maintaining uniform image quality across the entire display area, particularly when the display area has a non-rectangular shape and includes a demultiplexer.
Innovation Solution
The proposed solution involves a display device configuration with multiple pixel areas and non-pixel areas, where data lines from different pixel areas are separately coupled to output lines of a data driver using switch units, including demultiplexers, to efficiently distribute data signals and reduce the size of non-display areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a demultiplexer is used to supply data signals to data lines in a time-sharing manner, then the number of data driver channels is reduced and the size of driving circuit units is reduced, but the size of non-display areas may increase and image quality uniformity may be affected
Solution Approach 1:
The display area is divided into multiple pixel areas (first pixel area, second pixel area, third pixel area) with different data line configurations. The first pixel area uses a demultiplexer with 1:N switching ratio, while the second and third pixel areas use 1:1 switching ratios, allowing each segment to be optimized independently for both area reduction and image quality uniformity
Solution Approach 2:
Different switching ratios are applied to different pixel areas based on their specific requirements. The first pixel area uses 1:N demultiplexing to maximize area reduction where applicable, while the second and third pixel areas use 1:1 switching to maintain image quality uniformity in regions where it is critical, creating locally optimized quality characteristics
2Area of stationary object
If data lines are arranged densely to reduce non-display area, then the size of non-display area is reduced, but parasitic capacitance increases causing luminance deviations
Solution Approach 1:
The display area is segmented into multiple pixel areas with different data line arrangements. By dividing the display area and applying different switching strategies to different segments, the patent manages parasitic capacitance effects locally while maintaining overall area reduction
Solution Approach 2:
Switch units are introduced as intermediary components between the data driver output lines and the data lines. These switch units with different switching ratios act as mediators to control signal distribution, allowing dense data line arrangement while managing parasitic capacitance through controlled switching behavior
3Adaptability or versatility
If the display area has a non-rectangular shape with multiple pixel areas, then the display can accommodate different aspect ratios and improve adaptability, but the complexity of data line distribution and switch unit configuration increases
Solution Approach 1:
The display area is divided into multiple pixel areas (first, second, and third pixel areas) that can be arranged in different configurations to achieve non-rectangular shapes. This segmentation allows the display to adapt to various aspect ratios and form factors while managing complexity through modular data line distribution
Solution Approach 2:
The data driver and switch units are designed to serve multiple pixel areas with different requirements. The same data driver outputs can be distributed to different pixel areas with different switching ratios, making the system universally applicable to various display configurations and reducing overall complexity
Data Source
AI summary
A display device and a method of driving the same. The display device may include: a first pixel area including first pixels and first data lines coupled to the first pixels; a second pixel area including second pixels and second data lines coupled to the second pixels; a first non-pixel area disposed on one side of the first pixel area such that the first non-pixel area borders the first and second pixel areas; a data driver configured to output data signals corresponding to the first and second pixels through first and second output lines, respectively; and a switch unit including a first switch unit having a demux configured to alternately couple each of the first output lines to corresponding first data lines, and a second switch unit configured to couple the second output lines to the respective different second data lines.