Display Apparatus Diaphragm Stray Light Control
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Solution Overview
Problem
Traditional light field display devices using LCD or OLED panels suffer from ghost images and stray light due to the divergence of light beams, which affect the sharpness and depth perception of 3D images.
Innovation Solution
A display apparatus is designed with a first diaphragm and an optical element, including a second diaphragm, to project the image beam, minimizing stray light and ghost images by controlling the beam's path and aperture areas, thereby improving image sharpness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional LCD or OLED panel is used to emit light beam, then the display device can produce stereoscopic images, but the light beam has a certain divergence angle that causes ghost images and stray light
Solution Approach 1:
A diaphragm is introduced as an intermediary optical element between the display panel and the microlens array. The diaphragm has an aperture that selectively transmits light while blocking stray light and preventing light from adjacent microlenses from entering the current microlens, thereby eliminating ghost images and reducing stray light without affecting the stereoscopic image quality
Solution Approach 2:
The diaphragm aperture is designed with specific local characteristics - it has a determined area that is larger than the display pixel area but smaller than the microlens array area. This local quality control allows the system to accept light from the current microlens while blocking light from adjacent microlenses, solving the ghost image problem while maintaining the divergence angle needed for stereoscopic display
2Object-generated harmful factors
If the light beam divergence angle is controlled to reduce stray light, then ghost images are reduced, but the depth perception and sharpness of the image may be affected
Solution Approach 1:
The diaphragm acts as a mediator that selectively transmits light based on its aperture size. By carefully designing the aperture area to be between the display pixel area and the microlens array area, the diaphragm allows the image beam to maintain its divergence angle for depth perception while blocking stray light from adjacent microlenses, thus improving image sharpness without sacrificing depth perception
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 reduces ghost images and stray light, enhancing the sharpness and depth perception of 3D images displayed, suitable for applications like augmented and virtual reality.
Implementation Method 1
By setting the first diaphragm and the optical element, the display apparatus of the embodiment of the invention can avoid receiving stray light around the image beam
Data Source
AI summary
A display apparatus includes a display device and an optical element. The display device is configured to project an image beam to a first diaphragm. The optical element is disposed on the transmission path of the image beam. The optical element includes a second diaphragm, the second diaphragm is located on one side of the first diaphragm, and the first diaphragm is located between the second diaphragm and the display device. The area of the second diaphragm approximates the area of the first diaphragm. The image beam passes through the first diaphragm and the second diaphragm and is projected to a projection target.