Spray printing height measuring and calculating method
By using a spectral confocal sensor and an error correction model, the problem of insufficient accuracy in measuring printing height in OLED inkjet printing equipment has been solved, achieving high-precision, non-destructive printing height measurement, which is suitable for high-precision manufacturing scenarios such as OLED printing.
CN121383871AActive Publication Date: 2026-01-23JIHUA LAB
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Patent Information
- Application Number
- CN202511948292.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-23
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2045-12-23
AI Technical Summary
Technical Problem
Existing OLED inkjet printing equipment suffers from insufficient accuracy and system error accumulation in printing height measurement, making it difficult to achieve real-time high-precision measurement.
Method used
A spectral confocal sensor is used to emit polychromatic light from the side of the substrate away from the nozzle, and the reflected light signals from the substrate and nozzle surfaces are acquired. Non-contact measurement is achieved through refractive index calculation, error correction model and tilt compensation.
Benefits of technology
It achieves high-precision, non-destructive printing height measurement with a measurement error of less than ±0.1μm, making it suitable for high-precision manufacturing scenarios.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention is applicable to the field of jet printing, and discloses a jet printing height measuring and calculating method, which comprises the following steps of: emitting polychromatic light to a measured base material and a nozzle surface from one side, far away from a nozzle, of the measured base material by using a spectral confocal sensor, and receiving a first optical signal reflected from one side, close to the nozzle, of the measured base material and a second optical signal reflected by the nozzle; determining a first focusing wavelength focused on one side, close to the nozzle, of the measured base material, a second focusing wavelength focused on the nozzle and a nozzle incident angle according to the two optical signals, and substituting the first focusing wavelength, the second focusing wavelength and the nozzle incident angle into a pre-constructed refractive index calculation function to calculate the refractive index; substituting the dual wavelengths into a pre-constructed initial thickness calculation function and an error correction model to obtain a theoretical height value and an error compensation amount; if the inclination angle of the measured base material is not 0 degree, the actual height value from the measured base material to the nozzle is calculated according to a pre-constructed first real thickness calculation function, and the method is used for achieving online high-precision monitoring of the jet printing height.
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