Apparatus and method for inspecting a liquid crystal display panel
First Claim
1. An apparatus for inspecting a liquid crystal display device comprising:
- a probe unit applying an inspection signal to a liquid crystal panel;
a light source irradiating light to the liquid crystal panel;
an optical sheet between the light source and the liquid crystal panel, diffusing the light generated from the light source and changing an exit angle of the diffused light;
an optical system receiving the inspection signal and data about picture implemented on the liquid crystal panel by irradiating the light; and
frequency adjusting means for adjusting a frequency of the light generated from the light source.
2 Assignments
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Accused Products
Abstract
An apparatus and method for inspecting a liquid crystal display device is provided. The apparatus includes: a camera photographing a front surface of a liquid crystal panel; a back light irradiating light to the liquid crystal panel; a diffuser sheet diffusing the light generated from the back light; a prism sheet converting the diffused light so as to be perpendicularly incident to a rear surface of the liquid crystal panel; a probe unit applying an inspection signal to the liquid crystal panel; and a frequency converter converting a frequency of the light generated from the back light. The apparatus for inspecting the liquid crystal display device according to the invention detects bad sub-pixels, impossible to detect with the naked-eye, improving the quality of the liquid crystal display device.
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Citations
11 Claims
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1. An apparatus for inspecting a liquid crystal display device comprising:
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a probe unit applying an inspection signal to a liquid crystal panel; a light source irradiating light to the liquid crystal panel; an optical sheet between the light source and the liquid crystal panel, diffusing the light generated from the light source and changing an exit angle of the diffused light; an optical system receiving the inspection signal and data about picture implemented on the liquid crystal panel by irradiating the light; and frequency adjusting means for adjusting a frequency of the light generated from the light source. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for inspecting a liquid crystal display panel, comprising:
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uniformly irradiating a rear surface of the liquid crystal display panel; supplying the liquid crystal display panel with driving signals; scanning the liquid crystal display panel with an optical device; processing the scanning data obtained by the optical device to determine defects in the liquid crystal display panel; and displaying the detected defects on a display device, wherein uniformly irradiating the liquid crystal display panel comprises; generating light from a light source; passing the light through a diffuser sheet; passing the diffused light through a prism sheet such that the light exiting the prism sheet is perpendicularly incident to the rear surface of the liquid crystal display panel; and adjusting a frequency of the light generated from the light source to be substantially equal to a photographic frequency of the optical device. - View Dependent Claims (9, 10, 11)
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Specification