Foldable Display Data IC Power Optimization
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Solution Overview
Problem
Foldable display devices face inefficiencies in power consumption when driving display areas that do not require image implementation, as all components of the data integrated circuits are activated, leading to unnecessary power waste.
Innovation Solution
A foldable display device with a data integrated circuit that includes a timing controller, a gamma voltage generator, and a digital analog converter, where the gamma voltage generator is controlled by a gamma enable signal to determine whether to output gamma voltages, thereby optimizing power consumption by not driving the output buffer when a non-display area is activated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If all components of the data integrated circuits are driven to ensure complete display functionality, then the display device can operate in any folding state, but power consumption increases unnecessarily when only partial display areas are needed
Solution Approach 1:
The display panel is divided into multiple independent display areas (first display area and second display area) separated by a folding line. The data integrated circuit is segmented into corresponding driving components that can be independently controlled. When folded, only the necessary display area components are activated, allowing partial operation without driving the entire circuit, thus reducing power consumption while maintaining display functionality.
Solution Approach 2:
The display device dynamically adjusts its operational state based on the folding condition. The control circuit determines whether the device is folded or unfolded and accordingly activates only the necessary data integrated circuit components. This dynamic adaptation allows the system to optimize power consumption according to the actual display requirements in different folding states.
2Reliability
If the gamma voltage generator outputs all gamma voltages continuously, then complete gray scale control is available for all display areas, but power consumption increases when some display areas do not require image implementation
Solution Approach 1:
The gamma voltage generator is configured to extract and output only the necessary gamma voltages based on the folding state. When folded, the control circuit signals the gamma voltage generator to suppress outputting gamma voltages for the non-display area, extracting only the required voltages for the active display area. This selective extraction maintains complete gray scale control for the necessary areas while eliminating unnecessary power consumption.
3Duration of action of moving object
If the display device operates with reduced power consumption by disabling certain components, then battery life is extended, but the ability to drive all display areas simultaneously is compromised
Solution Approach 1:
The display device dynamically switches between different operational modes based on the folding state. In unfolded state, all data integrated circuit components are activated to drive the complete display area. In folded state, the control circuit dynamically adjusts to activate only the necessary components for the visible display area. This dynamic adaptability extends battery life during folded operation while preserving the capability to drive all display areas when needed.
Data Source
AI summary
According to an aspect of the present disclosure, a foldable display device includes a display panel including a plurality of display areas divided by a folding line; and a data integrated circuit outputting a data voltage to the plurality of display areas, wherein the data integrated circuit includes a timing controller outputting a gamma enable signal; a data processor processing an image data; a gamma voltage generator determining whether or not to output a plurality of gamma voltages according to the gamma enable signal; and a digital analog converter (DAC) outputting the gamma voltage, as the data voltage corresponding to a gray value of the image data.