Display Data Driver Gamma Switching for Multi-Mode Viewing Angles
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Solution Overview
Problem
Display devices in vehicles need to provide information without distracting the driver, requiring selective content display that maintains focus on vehicle operations.
Innovation Solution
A data driver configured to provide different gamma signals to specific areas of a display panel, allowing for modes with varying viewing angles and distraction levels, including a first mode with a wide viewing angle for shared information and a second mode with a narrow viewing angle for privacy or reduced distraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single gamma signal is provided to the entire display panel, then the device complexity is reduced, but the display quality and adaptability to different modes deteriorate
Solution Approach 1:
The display panel is divided into multiple areas, each capable of operating in different modes (first mode with wide viewing angle, second mode with narrow viewing angle). The data driver correspondingly segments the gamma signals into multiple first gamma signals and multiple second gamma signals, each mapped to specific areas and modes, allowing independent optimization of display quality for each mode without increasing overall system complexity
Solution Approach 2:
Different areas of the display panel are provided with different gamma signals appropriate to their specific mode of operation. The data driver generates multiple first gamma signals corresponding to different areas in the first mode, and multiple second gamma signals corresponding to different areas in the second mode, ensuring each area receives locally optimized display parameters for its operational context
2Manufacturing precision
If different gamma signals are provided to different areas for different modes, then the display quality is improved, but the device complexity increases
Solution Approach 1:
The data driver is designed with multi-functionality to generate both multiple first gamma signals and multiple second gamma signals, and to selectively provide them to different areas based on the operational mode. This universal design allows the same hardware to adapt to different display modes and area configurations without requiring separate dedicated circuits for each mode, thereby improving display quality while controlling complexity
Solution Approach 2:
The data driver dynamically switches between providing first gamma signals and second gamma signals to different areas based on the operational mode. The gamma switch selectively connects appropriate gamma signals to the output circuit based on mode signals, enabling flexible adaptation to different display requirements without permanent structural changes, thus achieving high display quality with manageable complexity
Data Source
AI summary
A display device can include a display panel including a first area configured to operate in a first mode, and a second area configured to operate in the first mode or a second mode, and at least one data driver connected to the display panel and configured to output a first gamma signal corresponding to the first mode to the first area and, output one of the first gamma signal and a second gamma signal corresponding to the second mode to the second area. Also, the display panel includes a pixel circuit including a first light emitting element, a second light emitting element, and a plurality of transistors, a first lens disposed on the first light emitting element, and a second lens disposed on the second light emitting element, the second lens having a different shape than the first lens.