Display Panel Mode Selection Circuit for Variable Viewing Angles
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Solution Overview
Problem
Existing display panels with variable viewing angles face challenges due to the complexity and cost increase from adding wires and circuit elements for pixel viewing angle selection, which complicates the design and increases costs.
Innovation Solution
A display panel with a simplified circuit configuration that includes a mode selection circuit to output emission signals to different nodes, driving first and second light-emitting elements based on mode selection signals, and a pixel circuit with switch elements to control the viewing angle of each pixel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wires and circuit elements are added to transmit signals for selecting viewing angles, then variable viewing angle functionality is achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the viewing angle selection function with the existing emission control circuitry by using the emission signal to control both light emission and viewing angle selection through shared switch elements. This integration eliminates the need for separate wiring and control circuits for viewing angle selection, thereby achieving variable viewing angle functionality without increasing device complexity
Solution Approach 2:
The emission signal and associated switch elements are designed to serve dual purposes: controlling the emission timing of the light-emitting element and selecting the viewing angle mode (wide or narrow). This multi-functionality approach allows a single circuit element to perform multiple tasks, reducing the overall number of components and wires needed in the display panel
2Adaptability or versatility
If wires and circuit elements are added to transmit signals for selecting viewing angles, then variable viewing angle functionality is achieved, but manufacturing cost increases
Solution Approach 1:
By combining the viewing angle selection function with existing emission control circuits, the patent eliminates the need for additional wires and circuit elements that would increase manufacturing complexity and cost. The shared use of emission signals and switch elements for both emission control and viewing angle selection reduces material requirements and assembly steps
Solution Approach 2:
The multi-functional design allows existing circuit elements to serve dual purposes (emission control and viewing angle selection), reducing the total component count and thereby lowering manufacturing costs while still achieving variable viewing angle functionality
3Device complexity
If the number of switch elements and wires is reduced, then manufacturing cost and complexity are reduced, but control precision for viewing angle selection may be affected
Solution Approach 1:
The patent segments the emission signal control into distinct time periods (first time period for wide viewing angle, second time period for narrow viewing angle) and uses the same switch elements to control both emission timing and viewing angle selection. This segmentation allows precise control of viewing angles through temporal multiplexing rather than requiring additional spatial components
Solution Approach 2:
The patent employs dynamic control of the emission signal to switch between wide and narrow viewing angle modes by adjusting the timing and duration of the emission signal in different time periods. This dynamic approach allows precise viewing angle control through temporal modulation of existing circuit elements rather than requiring static additional components
Data Source
AI summary
A display panel and a display device including the same are discussed. The display panel includes a mode selection circuit configured to output an emission signal to a first node in response to a first mode selection signal and output the emission signal to a second node in response to a second mode selection signal, and a pixel circuit configured to drive a first light-emitting element in response to a voltage of the first node in a first mode and drive a second light-emitting element in response to a voltage of the second node in a second mode.