Defect detection equipment and detection method for large-size light guide plate
A defect detection and light guide plate technology, which is applied in the direction of optical defect/defect test, measuring device, and material analysis through optical means, can solve the problems of unstable detection quality, difficult identification, low labor efficiency, etc., and achieve online automation Detection, avoidance of false detection and missed detection, the effect of compact structure design
Pending Publication Date: 2021-12-03
杭州衡眺科技有限公司
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Problems solved by technology
However, the appearance inspection of traditional light guide plates is mainly carried out manually. Due to the subjective judgment and eye fatigue factors in manual inspection, the manual inspection method has unstable inspection quality, difficult identification of some defects, and requires more labor and is expensive. , high labor intensity and low labor efficiency
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Embodiment 1
[0060] Embodiment 1. A large-size light guide plate defect detection device, such as figure 1 As shown, it mainly includes the light guide plate line scratch and black spot defect imaging device A, the light guide plate shadow and white spot defect imaging device B;
[0061] Light guide plate line scratches and black spot defect imaging device A, such as Figure 2-7 As shown, it includes a fixed platform support 1, on which a camera support one 5, a camera support two 8, an upper light box support 14, a horizontal lead screw mobile platform support 34, an auxiliary pulley support 35 and other components are installed, which are fixedly connected. To stably support the transmission device, the limit device, the detection device, etc.; the limit device and the detection device are respectively installed above the transmission device, and are respectively used for the limit and detection of the light guide plate transmitted on the transmission device.
[0062] The transmission d...
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The invention discloses defect detection equipment for a large-size light guide plate. The defect detection equipment comprises a light guide plate line scratch and black spot defect imaging device A and a light guide plate shadow and white spot defect imaging device B, the light guide plate line scratch and black spot defect imaging device A comprises a conveying device, a limiting device and a detection device, and the limiting device and the detection device are respectively arranged above the conveying device and are respectively used for limiting and detecting the light guide plate conveyed on the conveying device; and the light guide plate shadow and white spot defect imaging device B comprises a light guide plate suction device, a light guide plate position adjusting device and an image acquisition device. The invention further discloses a detection method using the device. According to the invention, on-line detection of defects such as scratches, stains, shadows, bright spots and the like of the light guide plate products can be realized, manual work can be replaced to carry out production detection operation of the light guide plate products, and the production quality of the light guide plate products can be effectively improved.
Description
technical field [0001] The invention relates to the technical field of light guide plate defect detection equipment, in particular to an online large-size light guide plate defect detection equipment and detection method based on machine vision. Background technique [0002] The light guide plate is made of optical-grade acrylic / PC sheet, and then high-tech materials with high reflectivity and non-absorbing light are used to engrave the bottom surface of the optical-grade acrylic sheet with laser, V-shaped cross grid engraving, UV screen printing technology prints light guide points. The optical-grade acrylic plate is used to absorb the light emitted from the lamp to stay on the surface of the optical-grade acrylic plate. When the light hits each light guide point, the reflected light will spread to all angles, and then destroy the reflection condition and be emitted from the front of the light guide plate. Through light guide points of various densities and sizes, the ligh...
Claims
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IPC IPC(8): G01N21/88G01N21/01
CPCG01N21/8851G01N21/01
Inventor 楼小栋李俊峰胡金良
Owner 杭州衡眺科技有限公司