Display Driver Circuit Data Dependent Power Management
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Solution Overview
Problem
Display systems face challenges in reducing power consumption and heat generation, which can lead to increased cooling requirements, component degradation, and potential device failure, especially with high-resolution displays that require high bandwidths.
Innovation Solution
A method and system that involves disabling specific display and display driver operations based on display data, using a display driver circuit to suspend data transfer and turn off light sources when all data bits indicate an off-state, thereby conserving power and reducing heat production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If display systems operate at high resolution and high bandwidth, then image quality is improved, but power consumption and heat generation increase
Solution Approach 1:
The patent implements periodic action by disabling data transfer and light source operation during portions of the display refresh cycle when all pixels are in an off-state. The display driver circuit evaluates display data bit by bit and suspends operations for bit planes where all bits indicate off-state, creating periodic intervals of reduced power consumption while maintaining image quality during active display periods
Solution Approach 2:
The patent applies partial action by selectively processing only the necessary bit planes of display data. Instead of transferring all bit planes regardless of content, the system identifies and transfers only those bit planes containing at least one on-state pixel, thereby reducing the partial bandwidth and power consumption required for display operation
2Measurement precision
If display systems operate at high resolution and high bandwidth, then image quality is improved, but heat generation increases
Solution Approach 1:
The patent reduces heat generation through periodic action by creating intervals during the display refresh cycle where data transfer and light source operation are suspended. When all pixels are in off-state for a particular bit plane, the system disables operations for that interval, thereby reducing cumulative heat generation while maintaining image quality during active display periods
Solution Approach 2:
The patent applies partial action to heat reduction by selectively processing only necessary bit planes. By identifying bit planes where all bits indicate off-state and skipping transfer of those bit planes, the system reduces the partial energy consumption and heat generation associated with processing and displaying unnecessary pixel data
3Use of energy by moving object
If power consumption is reduced, then heat generation is reduced, but data transfer bandwidth requirements decrease
Solution Approach 1:
The patent applies partial action to reduce power consumption while maintaining adequate data transfer bandwidth by selectively processing only necessary bit planes. The display driver circuit evaluates display data and identifies bit planes containing at least one on-state pixel, transferring only those bit planes rather than all bit planes, thereby reducing power consumption while preserving essential image information
Solution Approach 2:
The patent implements periodic action to manage data transfer bandwidth by creating intervals during the refresh cycle where data transfer is suspended for bit planes with all off-state pixels. This periodic suspension of data transfer for unnecessary bit planes reduces overall power consumption and heat generation while maintaining image quality during active transfer periods
Data Source
AI summary
A method for writing data to a display includes the steps of receiving a plurality of data bits, where each bit is associated with a different pixel of the display, reading the value of each data bit, determining whether each data bits has an off-state value, and generating a disable signal if each data bit has an off-state value. Responsive to a disable signal, the method further includes suspending the transfer of data to the pixels of the display, turning off a light source (e.g., an LED, laser, etc.) for a time period dependent on the significance of at least one of the data bits, and/or forcing each pixel of the display into an off state for a time period dependent on the significance of at least one of the data bits. A display driver circuit for performing the methods of the present invention is also disclosed.