Source Amplifier Control Circuit for Display Power Reduction
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Solution Overview
Problem
Existing display devices consume excessive power due to continuous operation of data drivers and source amplifiers, especially in free form display panels where not all data signals are necessary for displaying images, leading to inefficient power usage.
Innovation Solution
Implementing a display device with a source amplifier control circuit that selectively amplifies and outputs data signals only for the displayed image area, skipping or cutting off signals for non-displayed areas, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If data signals are output from all channels of the data driver regardless of display panel shape, then complete image data is provided to all areas, but power consumption increases unnecessarily
Solution Approach 1:
The data driver is divided into multiple independent output channels, each capable of being controlled separately. The source amplifier is segmented into multiple amplifiers corresponding to different data lines, allowing selective activation of only those channels required for the actual display area, thus reducing power consumption while maintaining complete data signal output where needed
Solution Approach 2:
The data driver system transitions from a static all-or-nothing operation mode to a dynamic selective operation mode. The source amplifier control circuit dynamically determines which amplifiers should be active based on the actual display area requirements, enabling the system to adapt its power consumption to the actual operational needs
2Loss of energy
If the source amplifier is driven continuously regardless of display area, then all data lines receive signals, but power consumption increases
Solution Approach 1:
Different amplifiers within the source amplifier are assigned different operational states based on their specific function. Amplifiers corresponding to data lines within the display area are activated with full signal quality, while amplifiers for non-display areas are deactivated or put in low-power mode, allowing each component to operate with the quality appropriate to its local requirement
3Loss of energy
If data signals are cut off for non-display areas, then power consumption is reduced, but the data driver must be more complex to determine which areas to display
Solution Approach 1:
The system performs preliminary determination of the display area boundaries before activating the data driver. The source amplifier control circuit receives information about the display area in advance and pre-configures which amplifiers should be active, avoiding the need for complex real-time decisions during signal transmission and simplifying the overall control logic
Data Source
AI summary
A disclosed display device includes a data driver configured to receive data signals corresponding to an input image and to output a first data signal corresponding to a first portion of the input image to be displayed. The display device also includes a display panel having a plurality of data lines and a display area configured to display the first portion of the input image based on the first data signal from the data driver. The data driver is further configured to cut off a second data signal corresponding to a second portion of the input image substantially outside the display area of the display panel from being output.