| CPC G06T 7/001 (2013.01) [G01B 11/24 (2013.01); G06T 7/70 (2017.01); H04N 23/56 (2023.01)] | 20 Claims |
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1. An apparatus for inspecting a display panel comprising:
a light source irradiating light toward a surface of the display panel;
a light detector detecting light reflected from a region of interest on the surface of the display panel to generate a captured image;
a lens system including at least one lens receiving reflected light and providing the reflected light to the light detector; and
an analyzer that:
quantifies a degree of curvature of the region of interest based on a result of comparing modeling data, the modeling data including a distribution of reference light intensity divided into coordinates for the region of interest, with detection data corresponding to the captured image, the detection data being divided into the same coordinates;
aligns the modeling data and the detection data by shifting the modeling data such that a maximum value coordinate of the reference light intensity in the modeling data coincides with a maximum value coordinate of light intensity in the detection data; and
determines whether the display panel is defective based on the quantified and aligned results.
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3. An apparatus for inspecting a display panel comprising:
a light source irradiating light toward a surface of the display panel;
a light detector detecting light reflected from a region of interest on the surface of the display panel to generate a captured image;
a lens system including at least one lens receiving reflected light and providing the reflected light to the light detector;
an analyzer quantifying a degree of curvature of the region of interest based on a result of comparing modeling data including distribution of reference light intensity for the region of interest with detection data corresponding to the captured image, and determining whether the display panel is defective based on a quantified result; and
an optical system adjusting the light emitted from the light source into parallel light, providing the parallel light to the region of interest, and adjusting a diameter of the parallel light according to a size of the region of interest, wherein
the analyzer includes:
a storage storing the modeling data according to the region of interest;
a first calculator calculating differences in magnitudes of data values for each coordinate between the modeling data and the detection data;
a second calculator calculating a total sum of the differences in magnitudes as a representative value corresponding to the degree of curvature; and
a determiner comparing the representative value with a threshold value to determine whether the display panel is defective.
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13. A method for inspecting a surface of a display panel comprising:
generating detection data including distribution of light intensity from reflected light of incident light irradiated to a region of interest on a surface of the display panel, the detection data being divided into coordinates;
aligning the detection data with modeling data for the region of interest, the modeling data including a distribution of reference light intensity divided into the same coordinates, by shifting the modeling data such that a maximum value coordinate of the reference light intensity in the modeling data coincides with a maximum value coordinate of the light intensity in the detection data;
determining a degree of curvature of the region of interest based on differences in magnitudes of data values for each coordinate between the aligned detection data and the modeling data for the region of interest; and
determining whether the display panel is defective based on the degree of curvature.
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