Dual-Emitter Display Pixel Circuit for Selective Viewing Angles
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Solution Overview
Problem
Existing display technologies lack the ability to control viewing angles on a pixel-by-pixel basis, particularly in applications requiring both narrow and wide viewing angles for privacy and shared content, such as in-vehicle displays.
Innovation Solution
A display panel design that includes pixels with dual light-emitting elements and a switch circuit controlled by a mode selection signal, allowing each pixel to be independently set to either a narrow or wide viewing angle through a mode control part, minimizing circuit elements and wires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dual light-emitting elements and switch circuit are added to enable pixel-by-pixel viewing angle control, then viewing angle control capability is improved, but device complexity increases
Solution Approach 1:
The pixel is divided into two independent light-emitting elements (first and second light-emitting elements), each capable of emitting light independently. This segmentation allows different viewing angle characteristics to be achieved through different elements, enabling the display to show different content at different viewing angles without requiring a complex overall pixel structure
Solution Approach 2:
The switch circuit serves multiple functions: it selectively connects either the first or second light-emitting element to the compensation part based on the mode selection signal. This single circuit component handles both narrow viewing angle mode and wide viewing angle mode control, reducing the need for separate control circuits for each mode
2Adaptability or versatility
If more circuit elements and wires are added for mode control, then viewing angle selection capability is improved, but power consumption increases
Solution Approach 1:
The mode control part is integrated directly into the pixel structure, combining the viewing angle selection function with the existing pixel circuitry. This integration eliminates the need for separate external control circuits, reducing overall power consumption while maintaining full mode control capability
Solution Approach 2:
The pixel circuit includes self-contained components (compensation part, switch circuit, mode control part) that manage the light-emitting element selection autonomously based on incoming signals. This self-service approach minimizes the need for additional power-hungry external control circuitry
3Adaptability or versatility
If dual light-emitting elements are implemented, then viewing angle variability is improved, but interference between components increases
Solution Approach 1:
The harmful interference between the two light-emitting elements is eliminated by using the switch circuit to extract or isolate the active element from the inactive one. The switch circuit physically disconnects the non-selected light-emitting element from the compensation part, preventing any electrical or optical interference between the two elements while still allowing both to coexist in the same pixel structure
Data Source
AI summary
A display panel can include a plurality of data lines, a plurality of gate lines, a plurality of power lines, and a plurality of pixels. Also, each of the plurality of pixels can include a first light-emitting element, a second light-emitting element, a compensation part configured to supply a current to the first light-emitting element and the second light-emitting element, a switch circuit, and a mode control part. The switch circuit is configured to in response to receiving a mode selection signal, supply the current to the first light-emitting element in a first mode, and supply the current to the second light-emitting element in a second mode or to supply the current to both of the first light-emitting element and the second light-emitting element in the second mode. Also, the mode control part is configured to supply the mode selection signal to the switch circuit.