Display Device Peep-Proof Area Brightness Compensation
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Solution Overview
Problem
Conventional peep-proof display devices compromise display brightness in privacy mode, reducing user experience due to significant brightness reduction, which affects the display effect during normal usage.
Innovation Solution
A display device with a polarizer and phase retarders configured to create a peep-proof area and a compensation area, where the phase retarders convert light into polarized light with opposite rotation directions, allowing the device to switch between peep-proof and normal display modes without affecting normal display brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional peep-proof display device is used to achieve privacy protection, then peep-proof functionality is improved, but display brightness is significantly reduced
Solution Approach 1:
The display panel is divided into two distinct regions: a peep-proof area that provides privacy protection and a compensation area that maintains normal display brightness. This segmentation allows each region to serve its specific function independently, resolving the contradiction between privacy protection and brightness maintenance.
Solution Approach 2:
Different optical properties are applied to different areas of the display. The peep-proof area uses specific phase retarder configurations to block viewing from angles, while the compensation area uses different phase retarder settings to maintain full brightness. This local differentiation enables simultaneous achievement of privacy protection and brightness preservation.
2Reliability
If peep-proof mode is activated to protect privacy, then privacy protection is improved, but user experience is reduced due to brightness reduction
Solution Approach 1:
By segmenting the display into peep-proof and compensation areas, the system provides privacy protection where needed while maintaining excellent viewing experience in the compensation area, thus improving overall user experience without sacrificing privacy protection.
3Reliability
If a phase retarder is added to achieve peep-proof functionality, then device complexity is increased, but peep-proof performance is improved
Solution Approach 1:
The phase retarder is integrated directly into the existing display panel structure, merging the peep-proof functionality with the display structure itself. This integration approach adds necessary functionality while minimizing increases in overall device complexity.
Solution Approach 2:
The phase retarder serves multiple functions: it enables peep-proof functionality in the peep-proof area while simultaneously maintaining normal display performance in the compensation area. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity.
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
The solution maintains high display brightness in normal mode while achieving effective peep-proof functionality in privacy mode, enhancing user experience by ensuring the display effect is not compromised.
Implementation Method 1
the phase retarder comprises: a first phase retarder corresponding to the peep-proof area and a second phase retarder corresponding to the compensation area; both the first phase retarder and the second phase retarder are a quarter-wave phase retarder; and the first phase retarder and the second phase retarder are configured to respectively convert light that is incident into the first phase retarder and light that is incident into the second phase retarder into polarized light with opposite rotation directions
Implementation Method 2
both the first phase retarder and the second phase retarder are a quarter-wave phase retarder; an absolute value of a phase retardation value caused by the first phase retarder and an absolute value of a phase retardation value caused by the second phase retarder are both equal to π/2
Data Source
AI summary
A display device, a driving method thereof and a display system are disclosed. The display device includes a display panel, a polarizer disposed on a side, where a light emitting surface of the display panel is located, of the display panel, and a phase retarder disposed on a side, where a light emitting surface of the polarizer is located, of the polarizer. The display region of the display panel includes a peep-proof area and a compensation area; the phase retarder includes a first phase retarder and a second phase retarder respectively corresponding to the peep-proof area and the compensation area; both the first and second phase retarder are a quarter-wave phase retarder; and the first and second phase retarder are configured to respectively convert light that is incident into the first phase retarder and the second phase retarder into polarized light with opposite rotation directions, in operation.