Display Device Memory Arrangement for Color Division Reduction
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Solution Overview
Problem
In active matrix display devices like LCDs and OLEDs, time-division driving methods for R, G, and B pixels often result in a color division phenomenon during 1 dot pattern inspection, leading to false contours and inefficient image realization due to limitations in data arrangement and memory management.
Innovation Solution
A display device and method that divides input data signals into first and second field data signals, arranging them according to a light emitting driving sequence, where pixels in the same column share the same color data signal pattern across four continuous pixel rows and three continuous pixel columns, with alternating light emission control signals for each field to minimize color division.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If time-division driving method is used for R, G, and B pixels, then driving efficiency is improved, but color division phenomenon occurs during 1 dot pattern inspection
Solution Approach 1:
The patent segments the data signal into separate red data signals, green data signals, and blue data signals, and stores them in distinct memory regions. This segmentation allows each color to be driven independently in time-division mode while maintaining proper color distribution, preventing the color division phenomenon during 1 dot pattern inspection.
Solution Approach 2:
The patent introduces a new dimension of data arrangement by organizing pixel data not just by spatial position but also by color type in a structured memory layout. This dimensional change in data organization enables the system to maintain color uniformity while achieving efficient time-division driving.
2Device complexity
If conventional data arrangement is used, then memory management is simple, but false contours appear during image display
Solution Approach 1:
The patent applies local quality by creating color-specific data arrangements where red, green, and blue pixel data are organized in distinct local regions of memory. This localized organization ensures that each color maintains its proper distribution pattern, preventing false contours while the structured approach keeps memory management systematic and manageable.
3Speed
If pixels are driven sequentially in time-division mode, then driving speed is improved, but color distribution becomes uneven
Solution Approach 1:
The patent performs preliminary action by pre-organizing and pre-sorting the pixel data into color-specific sequences before the actual driving process. The memory is structured in advance with red pixels, green pixels, and blue pixels in separate contiguous regions, allowing the driver to quickly access and transmit each color sequence without disrupting color distribution during high-speed time-division driving.
Data Source
AI summary
A display device and an image data memory arrangement method thereof are disclosed. When driving one frame with first and second fields, an input data signal is divided into first and second field data and the first and second field data are respectively arranged according to a light emitting driving sequence to control the light emitting for each field to be displayed. The first and second field data signals respectively include a color data signal pattern in which the data signals transmitted to the pixels corresponding to the same pixel column among the pixels respectively included in the first pixel row and the fourth pixel row display the same color, and the data signals transmitted to the pixels corresponding to the same pixel column among the pixels respectively included in the second pixel row and the third pixel row display the same color.