3D Display Front Panel Phase Difference Control
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Solution Overview
Problem
Existing display apparatuses face challenges in maintaining high image quality, particularly for 3D images, due to phase differences generated by front panels, which can lead to visual heterogeneity and deterioration of image quality.
Innovation Solution
A display apparatus is designed with a front panel made of non-reinforced glass and a triacetyl cellulose (TAC) film on its surface, ensuring a phase difference of 10 nm or less between the front film and the display module's light output, reducing polarization effects and improving image clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a front panel is used in display apparatus, then protection and structural integrity are improved, but phase difference is generated causing polarization effects and image quality deterioration
Solution Approach 1:
A TAC film is introduced as an intermediary layer between the front panel and the display module. This film acts as a mediator that compensates for the phase difference introduced by the front panel, thereby reducing polarization effects and improving image quality while maintaining the protective function of the front panel.
Solution Approach 2:
The refractive index of the TAC film is specifically optimized (1.44-1.54) to match and compensate for the phase difference caused by the front panel. By adjusting this optical parameter, the film effectively reduces polarization effects without compromising the front panel's structural integrity.
2Ease of manufacture
If conventional materials are used for front film, then manufacturing ease is improved, but phase difference exceeds 10 nm causing visual heterogeneity
Solution Approach 1:
The patent specifies precise parameter ranges for the TAC film including refractive index (1.44-1.54) and thickness (50-200 μm) to ensure phase difference remains within 10 nm. These controlled parameters achieve both manufacturing feasibility and optical precision requirements.
Solution Approach 2:
The use of TAC (triacetyl cellulose) as a specific material combines ease of manufacturing with precise optical properties. TAC is a well-established material in display technology that can be easily processed while providing the necessary refractive index and phase difference control.
3Volume of moving object
If front panel is placed close to display module, then device thickness is reduced, but phase difference increases causing rainbow effects
Solution Approach 1:
The TAC film serves as an optical intermediary that compensates for phase differences even when the front panel is positioned close to the display module. This allows thinning of the overall device while maintaining image quality by preventing rainbow effects through the film's specific optical properties.
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 effectively minimizes phase differences, enhancing the image quality of 3D displays by reducing polarization phenomena and preventing rainbow effects, thereby improving the overall visual experience.
Implementation Method 1
a phase difference generated by the front film is 10 nm or less
Implementation Method 2
reducing polarization effects and improving image clarity
Data Source
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AI summary
A display apparatus is provided. The display apparatus may include a front panel, wherein an entire front surface of the front panel is made of a transparent material. The display apparatus may also include at least one frame attached to a rear surface of the front panel to support the front panel, a display module attached to the frame to output a three-dimensional (3D) image, a layer on a front surface of the front panel, wherein light output from the layer and light output from the display module have a phase difference of 10 nm or less. The display apparatus may further include a rear housing to accommodate the display module and the frame such that a portion of the display module and a portion of the frame are shielded from view from outside of the display apparatus, and wherein the front panel covers whole of the front surface of the display module, and the light transparent material covers whole of the front surface of the front panel and enables the image output by the display module to be viewed from outside of the display apparatus.