Display Device Viewing Angle Control via Level Shift Mux
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Solution Overview
Problem
Existing display devices lack the ability to selectively control viewing angles in both row and column directions, which can lead to distractions for drivers in vehicles and compromise safety.
Innovation Solution
A display device comprising a plurality of pixel blocks, mux parts, a first level shift, a second level shift, and a mode controller, which allows for selective control of viewing angles by transmitting mode signals and mux signals to the mux parts, enabling operation in both wide and narrow viewing angle modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If viewing angle control is implemented in both row and column directions, then viewing angle control versatility is improved, but device complexity increases
Solution Approach 1:
The display device is divided into multiple pixel blocks arranged in a matrix, with each block capable of independent viewing angle control. Mux parts are segmented and distributed to different column groups, allowing localized control while reducing overall system complexity. This segmentation enables the device to achieve versatile viewing angle control in both row and column directions without requiring a fully complex control system for the entire display.
Solution Approach 2:
The patent introduces a column-based control dimension by adding mux parts that operate in the column direction, complementing the existing row-based control. This dimensional extension allows viewing angle control to be applied independently in both row and column directions, achieving versatile two-dimensional viewing angle control. The level shift circuits translate control signals into this expanded dimensional framework, enabling comprehensive viewing angle management without proportionally increasing complexity.
2Measurement precision
If multiple control signals are used for viewing angle control, then control precision is improved, but power consumption increases
Solution Approach 1:
Multiple control signals for viewing angle control are merged into a unified signal transmission framework using level shift circuits. These circuits combine row and column control signals into a coordinated system that achieves precise viewing angle control while reducing redundant signal transmissions. By merging control functions into the level shift architecture, the system maintains high control precision while minimizing the total number of active control signals, thereby reducing power consumption.
Solution Approach 2:
The control system employs periodic signal transmission patterns where viewing angle control signals are activated only when needed for specific pixel blocks. The level shift circuits and mux parts enable selective, periodic activation of control signals rather than continuous transmission, maintaining precise control capability while significantly reducing overall power consumption through intermittent operation.
Data Source
AI summary
A display device can include a plurality of pixel blocks, each of the plurality of pixel blocks including a plurality of pixels, a plurality of mux parts disposed to correspond to columns of the plurality of pixel blocks, a first level shift configured to transmit a first mode signal or a second mode signal to the plurality of mux parts, a second level shift configured to transmit a plurality of mux signals to the plurality of mux parts, and a mode controller configured to control the first level shift and the second level shift.