Display Device Column Pixel Driving Circuit Power Reduction
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Solution Overview
Problem
As the size and resolution of display panels increase, so does the power consumption of display devices, particularly due to dynamic power consumption related to frame data, which is not efficiently managed by existing technologies.
Innovation Solution
A display device that inverts the logic level of a switch signal at frame changes to output either odd or even column pixel data as half frame data, allowing the driving circuit to selectively drive odd or even column pixels through dedicated lines using the half frame data, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the size and resolution of display panel are increased, then the display performance is improved, but the power consumption increases
Solution Approach 1:
The display panel is divided into two independent sets of column pixels: odd column pixels and even column pixels. Each set can be driven independently through separate column lines, allowing the display to show complete images using only half of the total pixel columns at any given time, thereby reducing power consumption while maintaining full resolution capability.
Solution Approach 2:
The display alternates between driving odd column pixels and even column pixels in a periodic manner across successive frame periods. By inverting the logic level of the switch signal at frame changes, the system selects which set of column pixels to activate in each frame, creating a time-multiplexed display operation that reduces average power consumption.
2Measurement precision
If the size of frame data is increased, then the display resolution is improved, but the dynamic power consumption increases
Solution Approach 1:
The invention extracts and utilizes only half of the column pixel data from the complete frame data at any given time. By selecting either odd or even column pixel data based on the switch signal logic level, the system processes and transmits reduced data volumes while maintaining the ability to display full-resolution images through temporal alternation, thereby reducing dynamic power consumption associated with data processing and transmission.
Data Source
AI summary
A display device includes an image processor configured to invert a switch signal at a change of frames, and output, based on the switch signal, one among odd column pixel data and even column pixel data among first through (2M)-th column pixel data included in a frame data, as a half frame data, a display panel including first through M-th odd column pixels coupled to first through M-th odd column lines, respectively, and first through M-th even column pixels coupled to first through M-th even column lines, respectively, and a driving circuit including first through M-th driving units including a K-th driving unit configured to drive, based on the switch signal, one among K-th odd column pixels through a K-th odd column line and K-th even column pixels through a K-th even column line, using a K-th column pixel data included in the half frame data.