Display Panel Interference Inspection With Rotating Wave Plate
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Solution Overview
Problem
Existing display panel inspection methods face challenges in achieving accurate and efficient inspection of the light-transmitting area, often resulting in image forming defects and increased inspection time due to vibration and non-uniform interference fringes.
Innovation Solution
An apparatus and method utilizing a light source, half mirror, wave plate, reflective mirror, and imaging detector to capture interference fringes by rotating the wave plate at a predetermined angle, ensuring the display panel is fixed to prevent vibration, thereby enhancing inspection accuracy and reducing time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the display panel is fixed to prevent vibration, then measurement precision is improved, but device complexity increases due to the need for a panel supporter
Solution Approach 1:
A panel supporter is introduced as an intermediary component to hold and stabilize the display panel during inspection. This mediator prevents direct contact and potential vibration between the panel and the inspection apparatus, thereby improving measurement precision while isolating the panel from harmful vibrations.
2Manufacturing precision
If the wave plate is rotated at a predetermined angle, then manufacturing precision is improved by preventing image defects, but loss of time increases due to the rotation step
Solution Approach 1:
The wave plate is made rotatable to dynamically adjust its orientation angle during the inspection process. By rotating the wave plate to a predetermined angle, the system optimizes the interference fringe visibility and prevents image defects, thereby improving manufacturing precision despite adding a rotation step.
3Reliability
If the wave plate is rotated to prevent image defects, then reliability is improved, but device complexity increases due to the rotator mechanism
Solution Approach 1:
A rotator mechanism is integrated into the apparatus to dynamically adjust the wave plate's orientation. This dynamic adjustment ensures that the wave plate is positioned at the optimal angle for reliable inspection, preventing image defects and enhancing overall inspection reliability.
4Measurement precision
If the panel supporter fixes the display panel, then measurement precision is improved, but ease of operation decreases due to reduced flexibility
Solution Approach 1:
The panel supporter acts as a mediator that securely holds the display panel in a fixed position during inspection. This intermediary component provides stable support and prevents panel movement, thereby improving measurement precision while maintaining ease of operation through simple panel placement and removal.
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 ensures accurate inspection of the display panel's light-transmitting area by preventing image defects and reducing inspection time, while maintaining consistent interference fringe visibility.
Implementation Method 1
a half mirror reflecting a first beam which is a portion of a source beam irradiated from the light source and transmitting a second beam which is another portion of the source beam
Implementation Method 2
a half mirror reflecting a first beam which is a portion of a source beam irradiated from the light source and transmitting a second beam which is another portion of the source beam
Implementation Method 3
a wave plate disposed between the half mirror and the reflective mirror and transmitting the second beam, a rotator rotating the wave plate at a predetermined angle
Implementation Method 4
a reflective mirror reflecting the second beam transmitting the half mirror and the display panel to return to the half mirror
Implementation Method 5
an imaging detector photographing an interference fringe by the first beam and the second beam
Data Source
AI summary
An apparatus for inspecting a display panel includes a light source, a half mirror reflecting a first beam which is a portion of a source beam irradiated from the light source and transmitting a second beam which is another portion of the source beam toward a display panel, a reflective mirror reflecting the second beam transmitting the half mirror and the display panel to return to the half mirror, a panel supporter supporting the display panel between the half mirror and the reflective mirror, a wave plate disposed between the half mirror and the reflective mirror and transmitting the second beam, a rotator rotating the wave plate at a predetermined angle and an imaging detector photographing an interference fringe by the first beam and the second beam.