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AssigneeLG Electronics Inc.
InventorsHyoung Shik Kang, Soon Kug Hong, Seok Chang Oh, Min Gyu Song, Kwang Yeol Baek
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A glass cutting method and apparatus in which the laser beam to be irradiated onto a glass to be machined has a leading portion with a low energy density, and a trailing portion with a high energy density, thereby being capable of maximizing the thermal impact applied to the glass when the laser beam is irradiated, whereas the glass is divided into a plurality of glass portions, for which the moving speed and energy of the laser beam are controlled to meet respective thermal stress distributions at those glass portions, thereby being capable of achieving an improvement in the quality of the cut glass surface while achieving a rapid glass cutting process.
A glass cutting method comprising the steps of irradiating a laser beam onto a virtual cutting line on a glass to be cut while moving the laser beam along the virtual cutting line, thereby heating the glass, and spraying a coolant onto the heated glass, thereby cutting the glass, wherein the glass is divided, along the virtual cutting line, into leading, intermediate, and trailing portions, and the laser beam has a moving speed and energy controlled so that the moving speed and energy are gradually increased as the laser beam moves from the leading glass portion to the intermediate glass portion, while being gradually decreased as the laser beam moves from the intermediate glass portion to the trailing glass portion.
A glass cutting apparatus comprising:
A glass cutting apparatus comprising a beam generating unit for irradiating a laser beam onto a glass, to be machined, to heat the glass, and a coolant sprayer for spraying a coolant onto the glass to cut the glass, further comprising:
Dependencies are inferred from the claim text.