Display Panel Viewing Angle Control via Mode Line Sets
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Solution Overview
Problem
Current display apparatuses lack the ability to freely adjust the ratio of viewing angles in different regions, limiting user flexibility and content adaptation in vehicle-mounted displays.
Innovation Solution
A display panel with a bezel area and mode control line sets, where each subpixel includes a driving transistor connected to a power line and light emitting devices controlled by mode control signals, allowing independent control of viewing angles through first and second lens regions, enabling adjustable ratios of viewing angle modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a display apparatus uses a fixed viewing angle mode for the entire display area, then the structure is simple and easy to manufacture, but the adaptability to different user requests and content types is poor
Solution Approach 1:
The display area is divided into multiple independent pixel blocks, where each pixel block can be independently controlled to display different content at different viewing angles. This segmentation allows the display apparatus to show navigation information with a wide viewing angle to the driver while simultaneously showing entertainment content with a narrow viewing angle to the passenger, thereby improving adaptability without requiring a completely complex new structure
Solution Approach 2:
The patent implements dynamic switching between wide viewing angle mode and narrow viewing angle mode for each pixel block. By using mode control line sets and mode control transistors, the display can dynamically adjust the viewing angle characteristics of different regions based on real-time user requests and content types, transforming a static display system into a dynamic one that adapts to varying conditions
2Adaptability or versatility
If the display area is divided into multiple regions with different viewing angles, then the adaptability improves, but the control system complexity increases
Solution Approach 1:
The patent merges the viewing angle control function into the existing pixel circuit structure by integrating mode control transistors and mode control line sets directly into each pixel block. This allows the control system to manage multiple viewing angle regions without requiring separate complex control circuits for each region, as the control functionality is combined at the pixel level
Solution Approach 2:
The mode control line sets and mode control transistors serve multiple functions: they control the switching between wide and narrow viewing angle modes, manage different content types across pixel blocks, and adapt to various user requests. This multi-functionality reduces the need for separate dedicated control circuits for each viewing angle region, thereby managing complexity while maintaining flexibility
3Manufacturing precision
If separate light emitting devices are used for different viewing angle modes, then the viewing angle control precision improves, but the power consumption increases
Solution Approach 1:
The patent applies local quality by providing different lens regions (first lens region for wide viewing angle, second lens region for narrow viewing angle) over different light emitting devices within the same pixel block. Each lens region is specifically positioned to control the viewing angle of its corresponding light emitting device, achieving precise viewing angle control for different content types without requiring the entire display to operate at high power levels simultaneously
Solution Approach 2:
The display apparatus uses periodic switching between wide viewing angle mode and narrow viewing angle mode for different pixel blocks based on the type of content being displayed. By alternating between modes and using mode control signals to switch between different light emitting devices or lens regions, the system achieves precise viewing angle control while managing power consumption through selective activation rather than continuous operation of all high-precision components
Data Source
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Figure 3A~3B
AI summary
Disclosed is a display panel capable of adjusting a ratio of a plurality of areas capable of independently controlling a viewing angle in a display area, wherein the display panel includes a plurality of mode control line sets individually connected to a plurality of pixel blocks, wherein each of the plurality of mode control line sets includes a first mode control line for supplying a first mode control signal and a second mode control line for supplying a second mode control signal, and wherein each of the plurality of subpixels includes a driving transistor connected to a first power line, a first light emitting device connected to the driving transistor through a first mode control transistor controlled by the first mode control signal, a second light emitting device connected to the driving transistor through a second mode control transistor controlled by the second mode control signal, a first lens region disposed on the first light emitting device, and a second lens region disposed on the second light emitting device, wherein the first lens region and the second lens region differently control a viewing angle in a first direction.