Display Driver Circuit Animated Always-On Display Power Management
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Solution Overview
Problem
Display devices in always-on display (AOD) mode face high power consumption due to frequent waking up of the application processor and data transmission, limiting user experience by only displaying static images to conserve power.
Innovation Solution
A display driver device with a driver circuit and control circuit that writes animated image information into a storage circuit during a writing period and stops receiving updates during a non-writing period, allowing the display panel to continuously show the animated image without continuous data transmission, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the display device displays a static image under AOD mode to reduce power consumption, then power consumption is reduced, but user experience cannot be satisfied
Solution Approach 1:
The patent applies periodic action by dividing the display period into writing periods and non-writing periods. During writing periods, the control circuit receives and writes display information from external devices. During non-writing periods, the control circuit stops receiving and writing display information, allowing the display panel to continuously display the animated image from stored information without continuous data transmission, thus reducing power consumption while maintaining animated display capability
Solution Approach 2:
The patent applies preliminary action by pre-writing display information of animated images into the storage circuit during writing periods before the non-writing periods begin. This allows the display driver device to autonomously display the animated image during non-writing periods without needing continuous external input, reducing the need for frequent processor wake-ups and data transmission
2Use of energy by moving object
If the display device decreases the times of waking up the application processor and data transmission to reduce power consumption, then power consumption is reduced, but the display can only show static images
Solution Approach 1:
The patent applies segmentation by dividing the display period into distinct writing periods and non-writing periods. It also segments the display information into multiple frames that are sequentially written into the storage circuit. This segmentation allows the system to transmit data only during writing periods and then autonomously display multiple frames during non-writing periods, reducing transmission frequency while maintaining animated display capability
Solution Approach 2:
The patent introduces a storage circuit as an intermediary between the control circuit and the display panel. The storage circuit stores display information of animated images and provides it to the display driver device during non-writing periods. This intermediary enables the display to show animated images without continuous direct communication between the external device and display driver, reducing power consumption while maintaining display versatility
Data Source
AI summary
A display driver device including a driver circuit and a control circuit is provided. The driver circuit is configured to drive a display panel to display an animated image for a display period under an always on display mode according to display information of the animated image stored in a storage circuit. The display period includes a writing period and a non-writing period after the writing period. The control circuit is configured to write the display information of the animated image received from an external device into the storage circuit during the writing period of the display period. The control circuit is configured to stop receiving the display information from the external device and writing any display information into the storage circuit during the non-writing period of the display period. A display device including the display driver device and an operating method for the display driver device are also provided.