Multi-primary Display Driving with Uniform Line Resistance
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Solution Overview
Problem
Display devices with RGBW or multi-primary color structures face issues such as image crosstalk and flicker due to driving methods, leading to display deterioration like striped patterns, which affect image quality and reliability.
Innovation Solution
A multi-primary color display device with a unit pixel part comprising red, green, blue, and a multi-primary subpixel, where data lines and pads are connected via connection lines with uniform line resistance, and pads are arranged in rows to increase contact area with the driving chip, ensuring uniform voltage application and improved driving reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If one-dot inversion driving method is applied to LCD panel with RGBW or multi-primary color structure, then color reproduction and luminance are improved, but image crosstalk and flicker occur causing striped patterns
Solution Approach 1:
The invention divides the display panel into multiple inversion groups, where each group contains subpixels of the same color. This segmentation allows different inversion driving methods to be applied to different color subpixels simultaneously, preventing image crosstalk and flicker while maintaining improved luminance and color reproduction from the multi-primary color structure.
Solution Approach 2:
The invention implements dynamic voltage polarity reversal where the polarity of data voltages is inverted for each inversion group within a frame period. This dynamic switching prevents charge accumulation and reduces image crosstalk, allowing the display to maintain high luminance without displaying striped patterns or flicker.
2Stability of the object's composition
If same polarity voltage is applied to same color subpixels in RGBW structure, then color consistency is maintained, but image crosstalk causes striped patterns
Solution Approach 1:
The invention segments subpixels by color into different inversion groups (first inversion group for red, second for green, third for blue, fourth for white/multi-primary). This allows each color group to maintain consistent color characteristics while applying different inversion sequences to different groups, preventing image crosstalk-induced striped patterns.
Solution Approach 2:
The invention applies periodic voltage polarity inversion to each inversion group with different timing. Each group undergoes polarity reversal at different periods within the frame, which maintains color consistency within each group while preventing synchronized crosstalk that would manifest as striped patterns across the display.
3Adaptability or versatility
If connection lines have different line resistance, then routing flexibility is improved, but signal distortion occurs affecting voltage uniformity
Solution Approach 1:
The invention implements local quality compensation by assigning different line resistance values to connection lines based on their specific routing requirements. Each connection line's resistance is optimized for its local path characteristics, allowing routing flexibility while maintaining overall voltage uniformity through compensatory design in the driving scheme.
Solution Approach 2:
The invention changes the electrical parameters (line resistance values) of connection lines to match their specific routing lengths and paths. By deliberately designing different resistance values for different connection lines, the system achieves optimal voltage delivery to each subpixel despite varying path characteristics, preventing signal distortion.
Data Source
AI summary
A multi-primary color display device includes a unit pixel part, a plurality of data lines, a plurality of pads and a plurality of connection lines. The unit pixel part is disposed on a display area and includes at least four subpixels. The data lines extend in a first direction on display area, and are electrically connected to the subpixels. The pads are arranged in a second direction perpendicular to the first direction on a peripheral area surrounding the display area, and are electrically connected to a driving chip. The connection lines connect the data lines to the pads disposed on the peripheral area. Each of the connection lines has a same line resistance.