Display Driver Circuit Content Positioning for OLED Burn-in Prevention
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Solution Overview
Problem
Organic Light-Emitting Diode (OLED) displays suffer from burn-in due to continuous screen usage, and Always-On Display (AOD) modes require processor state switching, leading to increased power consumption.
Innovation Solution
An electronic device with a display driving circuit that stores coordinate information for content movement, allowing the display position to be changed periodically even when the processor is in a low-power state, reducing the need for frequent state switching and minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the processor switches from sleep state to active state to change display position, then the burn-in phenomenon is prevented, but power consumption increases
Solution Approach 1:
The patent divides the system into two functional parts: the processor that enters sleep state to save power, and the display driving circuit that remains active to handle content position changes. This segmentation allows the processor to avoid frequent wake-sleep cycles while still achieving burn-in prevention through coordinated control of the display driving circuit.
Solution Approach 2:
The display driving circuit acts as an intermediary between the processor and the display panel. It receives coordinate information from the processor during active state, stores it in internal memory, and autonomously changes content display positions during processor sleep state, thereby mediating the conflict between power saving and burn-in prevention.
2Reliability
If the processor remains in active state to change content display position, then burn-in is prevented, but battery life decreases
Solution Approach 1:
The processor performs preliminary actions by storing coordinate information for content position changes in the display driving circuit's internal memory before entering sleep state. This preliminary setup enables the display driving circuit to autonomously execute position changes during the processor's sleep period, achieving burn-in prevention without continuous processor activity.
Solution Approach 2:
The display driving circuit provides self-service functionality by autonomously changing content display positions based on stored coordinate information during processor sleep state. It uses its internal timer to periodically update positions without requiring processor intervention, thereby extending battery life while preventing burn-in.
3Ease of operation
If frequent processor state switching is performed, then content position changes are achieved, but power consumption increases
Solution Approach 1:
The patent extracts the content position control function from the processor and transfers it to the display driving circuit. The processor only needs to send coordinate information and enter sleep state, while the display driving circuit handles the actual position changes using its internal memory and timer, eliminating frequent processor state switching.
Solution Approach 2:
The display driving circuit uses its internal timer to periodically change content display positions at predetermined intervals during processor sleep state. This periodic action achieves continuous burn-in prevention without requiring the processor to remain active or frequently switch states.
Data Source
AI summary
An electronic device according to various embodiments may comprise a display panel, a processor, and a display driver circuit including an internal memory and configured to drive the display panel, wherein the display driver circuit may be configured to: receive, from the processor, movement information of a designated content to be displayed on the display panel while the processor operates in a low power state; store the movement information in the internal memory; display the designated content at a first position on the display panel while the processor operates in the low power state; and move the designated content displayed at the first position to a second position on the display panel and display the same at the second position, at least on the basis of the movement information stored in the internal memory while the processor operates in the low power state.