US 11,668,564 B2
Laser leveling tool with improved laser pattern projection
Chi Fung Chan, North Point (HK); Hopong Cheung, North Point (HK); Yuenyu Wong, North Point (HK); and Ben-Hur Seneca, North Point (HK)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Appl. No. 17/272,984
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Sep. 12, 2018, PCT No. PCT/CN2018/105145
§ 371(c)(1), (2) Date Mar. 3, 2021,
PCT Pub. No. WO2020/051784, PCT Pub. Date Mar. 19, 2020.
Prior Publication US 2021/0325184 A1, Oct. 21, 2021
Int. Cl. G01C 15/00 (2006.01)
CPC G01C 15/004 (2013.01) 20 Claims
OG exemplary drawing
 
1. A laser leveling tool comprising:
a laser source configured to emit a laser beam; and
a digital laser beam projection system configured to transmit the laser beam emitted from the laser source and convert the laser beam into a desired projection pattern that is to be projected onto a target surface, the digital laser beam projection system including:
a pixel panel arranged and configured to receive the laser beam emitted from the laser source; and
pixel units configured to be selectively activated to one of reflect and transmit the laser beam to form a patterned laser beam that conforms to the desired projection pattern.