A visual real-time detection method for liquid crystal display defects under multiple backgrounds
A liquid crystal display, real-time detection technology, applied in the direction of instrumentation, image analysis, image enhancement, etc., can solve problems such as difficult problems, achieve the effect of reducing the problem of algorithm missed detection, good applicability and engineering practical value, and solve the effect of display defect detection
Active Publication Date: 2022-07-26
KUNMING UNIV OF SCI & TECH
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Although the current visual inspection technology has achieved great success in the defect detection industry, the detection and identification of LCD defects is still a difficult problem in the industry and needs continuous improvement and improvement
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0036] Example 1: as Figure 1-12 As shown, a visual real-time detection method for liquid crystal display defects under multiple backgrounds, the method steps are as follows:
[0037] Step 1. Perform image preprocessing on the collected display defect data set under one / more display backgrounds to obtain an experimental data set;
[0038] Step 2. Classify the display defects in the experimental data set into six different defects;
[0039] Step 3. Use three different detection algorithms to detect whether the images in the experimental data set have defects (if the defects cannot be detected by the three detection algorithms, it indicates that the display is a qualified product; otherwise, it indicates that there are defects); among them, three Different detection algorithms include: LCD Mura and Scratch Defect Detection Algorithm, LCD Edge Defect Detection Algorithm, LCD Color Level Error Defect Algorithm.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a visual real-time detection method for liquid crystal display defects under multiple backgrounds. The invention firstly uses algorithms such as image averaging and histogram equalization to preprocess the image to be detected; three different algorithms are proposed for use in six different Defects, can better adapt to defect detection in different backgrounds, specifically: for LCDMura, scratch defects with blurred edges, low contrast and complex background textures, the maximum inter-class variance method and morphological operations are used for solid color display. Defect image segmentation under the background; using the maximum inter-class variance method and 4 connectivity judgment criteria to segment and mark the ROI edge defects under the grid display background For color deviation defects, the gray value variance and mean of the sub-regions are divided to Determine whether there is a color difference in the 32-level gradient color display background. The experimental results show that the algorithm can better realize the real-time detection of LCD defects, and has better applicability and engineering practical value.
Description
technical field [0001] The invention relates to a visual real-time detection method for liquid crystal display defects under multiple backgrounds, and belongs to the field of semiconductor defect visual detection. Background technique [0002] In recent years, as the demand for LCD panels has increased year by year, the competition among manufacturers has become particularly fierce, and improving product quality and production efficiency has become an important factor for manufacturers to maintain their superiority. In the production process of liquid crystal display, the distribution difference and concentration difference of liquid crystal material in space, the short circuit and open circuit of scanning line, the existence of impurities in the liquid crystal, etc., may cause various types of defects in the LCD panel, thus affecting the visual effect of the product and users. experience, and product quality cannot be guaranteed. At present, liquid crystal display defect d...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00G06T7/11G06T7/136G06T7/194G06T5/40G06T5/00G02F1/13
CPCG06T7/0008G06T7/11G06T7/136G06T7/194G06T5/40G06T5/002G02F1/1309G06T2207/10024G06T2207/30121
Inventor 王森王庆健陈明方崔禹伞红军杨荣良林森
Owner KUNMING UNIV OF SCI & TECH