Display Driving Circuit Amplifier Sharing for Power Reduction
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Solution Overview
Problem
Electronic devices with displays, such as smartphones and tablets, face high power consumption due to the display panel's power usage, particularly when adjacent pixels show similar image data, as they require separate amplifiers for each pixel, leading to increased energy expenditure.
Innovation Solution
Implementing a display driving circuit that identifies when adjacent pixels have similar output data and shares a source amplifier between them, reducing power consumption by limiting the output of some amplifiers and adjusting the shared threshold value based on scene transition levels to optimize power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If separate source amplifiers are supplied for each pixel, then each pixel can be driven independently with high image quality, but power consumption of the display panel increases
Solution Approach 1:
The patent merges the driving function of multiple adjacent pixels into a single source amplifier. When adjacent pixels have similar image data (within a threshold value), they share the same source amplifier, reducing the total number of amplifiers needed and thereby lowering power consumption while maintaining acceptable image quality
Solution Approach 2:
The patent introduces a threshold value parameter that dynamically controls the sharing behavior of source amplifiers. By adjusting this threshold, the system can balance between power consumption and image quality based on the complexity and variation of displayed image content
2Use of energy by moving object
If source amplifiers are shared between adjacent pixels with similar output data, then power consumption is reduced, but image quality may deteriorate due to level differences
Solution Approach 1:
The patent dynamically adjusts the threshold value parameter based on image characteristics. When image complexity is high, the threshold is lowered to reduce sharing and maintain image quality; when image complexity is low, the threshold is raised to increase sharing and save power
Solution Approach 2:
The system transitions from a static amplifier assignment to a dynamic sharing mechanism that adapts to varying image content. The display driving circuit continuously evaluates image data similarity and adjusts amplifier sharing in real-time, optimizing the balance between power consumption and image quality
3Use of energy by moving object
If the threshold value for amplifier sharing is increased, then more amplifiers can be shared and power consumption decreases, but level differences on screen become more noticeable
Solution Approach 1:
The patent implements a feedback mechanism where the display driving circuit monitors image characteristics and dynamically adjusts the threshold value. This feedback loop ensures that the threshold is optimized for each displayed image, preventing visible level differences while maximizing power savings
Data Source
AI summary
An electronic device according to various embodiments of the disclosure includes a processor, a display panel that includes a plurality of pixels (the plurality of pixels include a first pixel and a second pixel), and a display driving circuit that drives the display panel and receives image data to be displayed through the display panel from the processor, and the display driving circuit is composed to identify output data of the first pixel and output data of the second pixel to display the image data, and, when the output data of the first pixel and the output data of the second pixel have more than a specified similarity, is composed to drive the first pixel and the second pixel by using a source amplifier specified in relation to the first pixel.