View Angle Control Panel Switching for Smooth Privacy Mode Brightness
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Solution Overview
Problem
Display devices experience abrupt changes in brightness when switching between sharing and privacy modes, leading to eye fatigue due to noticeable changes in view angles.
Innovation Solution
Incorporating a view angle control panel with a liquid crystal layer driven by electric fields generated between electrodes, using a voltage signal with gradually changing duty cycles during the transition phase to smoothly adjust brightness between sharing and privacy modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display device switches between sharing mode and privacy mode, then the view angle control function is improved, but the brightness changes abruptly causing eye fatigue
Solution Approach 1:
The patent applies dynamics by making the voltage signal adjustable and time-dependent. During mode transitions, the voltage signal dynamically changes its duty cycle from 0% to 100% (or vice versa) over a predetermined time period, enabling the liquid crystal layer to gradually adjust its orientation and the brightness to transition smoothly, thereby avoiding abrupt changes that cause eye fatigue.
Solution Approach 2:
The patent implements preliminary action by introducing a transition phase before completing the mode switch. During this preliminary phase, the voltage signal is adjusted in advance to gradually change the liquid crystal layer's state, preparing the display for the final mode while minimizing sudden brightness changes that would harm user comfort.
2Object-affected harmful factors
If a voltage signal with gradually changing duty cycles is applied during transition phase, then the brightness change is smoothed, but the control complexity increases
Solution Approach 1:
The patent applies periodic action by using alternating voltage signals with specific duty cycles. During the transition phase, the voltage signal alternates between high and low states with gradually changing duty cycle ratios, creating a controlled periodic pattern that smoothly adjusts the liquid crystal layer orientation while maintaining manageable control complexity through standardized waveform generation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution prevents abrupt brightness changes, reducing eye fatigue by gradually adjusting the display's brightness as it transitions between sharing and privacy modes.
Implementation Method 1
the liquid crystal molecule is driven to rotate by an electric field generated between the first electrode and the second electrode
Implementation Method 2
the view angle liquid crystal layer includes a liquid crystal molecule
Data Source
AI summary
Provided are a display device, a backlight source, and an automobile. The display device includes a view angle control panel; in a sharing mode phase, a same voltage is provided for the first electrode and the second electrode; in a privacy mode phase, a first voltage is provided for the first electrode, and an alternating voltage signal is provided for the second electrode, where a high voltage of the alternating voltage signal is greater than the first voltage, and a low voltage of the alternating voltage signal is less than the first voltage; in a transition phase, the first voltage is provided for the first electrode, and a voltage signal with gradually changing duty cycles is provided for the second electrode; where the transition phase is located between the sharing mode phase and the privacy mode phase.