Sub-Pixel Display Panel Detection Using Offset Photosensitive Arrays
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Solution Overview
Problem
Existing optical detection devices for display panels are limited by the size of photosensitive devices, which restricts minimum resolution and detection accuracy, making it difficult to achieve sub-pixel level detection without using magnifying lenses that are inefficient for mass production.
Innovation Solution
An optical detection apparatus with photosensitive units arranged in an array, where the minimum distance between adjacent units is less than a sub-pixel size, and units in adjacent rows have a position offset, combined with a method of moving the display panel to acquire screen information in segments to achieve complete detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the minimum size of photosensitive device is reduced to improve detection accuracy, then detection accuracy improves, but device complexity and manufacturing difficulty increase due to process limitations and drive circuit size
Solution Approach 1:
The photosensitive device is segmented into multiple independent photosensitive units arranged in array form. Each unit can be independently controlled and read out, allowing the system to achieve high detection accuracy equivalent to smaller pixel sizes without requiring each individual photosensitive element to be extremely small, thus avoiding the manufacturing and drive circuit complexities associated with miniaturization.
Solution Approach 2:
The invention transitions from a single photosensitive device detecting the entire display panel to multiple photosensitive units arranged in an array that collectively detect different regions. This spatial distribution across multiple dimensions allows the system to achieve sub-pixel detection accuracy by combining data from multiple units, effectively bypassing the limitations of single-device miniaturization.
2Measurement precision
If magnifying lenses are used to achieve sub-pixel level detection, then detection accuracy improves, but detection efficiency decreases making it unsuitable for mass production
Solution Approach 1:
The invention replaces the mechanical/optical approach of using magnifying lenses with an electronic/digital approach using multiple photosensitive units in an array. Instead of physically magnifying the image through lenses, the system achieves sub-pixel detection accuracy through electronic data processing and combination of signals from multiple units, significantly improving detection efficiency for mass production.
Solution Approach 2:
By segmenting the detection task across multiple photosensitive units, each unit can capture information simultaneously without requiring sequential magnification and scanning. This parallel detection approach eliminates the time-consuming nature of lens-based magnification methods while achieving the same or better detection accuracy.
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 enables sub-pixel level detection accuracy, improving detection efficiency and enabling mass production without the need for time-consuming lens-based methods.
Implementation Method 1
A common optical detection device consists of photosensitive devices such as charge coupled device (CCD), complementary metal oxide semiconductor (CMOS), and photo diode (PD)
Data Source
AI summary
An optical detection apparatus and method for detecting a display panel is provided. The apparatus includes photosensitive units arranged in an array. A minimum distance between adjacent photosensitive units is less than a sub-pixel size of the display panel; the photosensitive units in adjacent rows have a position offset in a first direction; and an offset distance corresponding to the position offset is less than the sub-pixel size of the display panel.