Goertek Inc.

Huawei Technologies Co., Limited

Goer Optical Technology Co., Ltd.

Lebao Yang

Jing Zhang

Bo Tian

Fei Zhao

Xianbin Wang

Zhenlin Xie

Zhicong Xie

Jingfei Zhang

The optical machine module includes a light emitting module and a modulation module. The light emitting module includes a light source configured to emit linearly polarized light. The modulation module includes a modulation component. The modulation component includes a light-combining prism and a liquid crystal on silicon (LCOS) modulator. The light-combining prism includes four rectangular prisms. The light-combining prism has four sides and four intersection planes formed by the four rectangular prisms. The LCOS modulator includes a first LCOS modulator, a second LCOS modulator, and a third LCOS modulator. The first LCOS modulator, the second LCOS modulator, and the third LCOS modulator are respectively disposed on light emitting sides of three different sides. At least two of the four intersection planes are configured to split light. At least two of the four intersection planes are configured to combine light.

Projection display apparatus

The present invention discloses a driving current correction method and apparatus for multiple laser devices, and a laser projector. A specific embodiment of the method includes in a projection period of a n-th pixel point: sequentially driving a plurality of laser devices of a laser source to emit laser, and respectively detecting light intensity information of lasers emitted from the plurality of laser devices by using a light sensor; acquiring an actual light intensity of the lasers emitted from the plurality of laser devices according to an electric signal output by the light sensor, and establishing a corresponding relation between a driving current and an actual light intensity of each laser device according to the driving current of the each laser device and the actual light intensity of the laser emitted from the each laser device when the n-th pixel point is projected; from a projection of a (n+1)-th pixel point: correcting the driving current of the each laser device according to a set light intensity of the each laser device and the corresponding relation between the driving current and the actual light intensity of the each laser device. The implementation has a high consistency of detecting light intensity information that can be simply performed.

Driving current correction method and apparatus for multiple laser devices, and laser projector

A speckle elimination apparatus, a laser light source and a laser projection system, the speckle elimination apparatus comprising a wave plate () and a transmission plate () respectively arranged on a laser beam light path, the wave plate () and the transmission plate () having similar refractive indices and closely arranged adjacent sides, the wave plate () being arranged so that an incident surface allows a portion of an incident laser beam to pass through, the transmission plate () being arranged so that an incident surface allows the remainder of the incident laser beam to pass through, the portion of the incident laser beam being 25%-75% of the incident laser beam. The speckle elimination apparatus eliminates the phenomenon of laser speckle, and prevents stray light from being produced during laser speckle elimination.

Speckle elimination apparatus, laser light source and laser projection system

A speckle elimination apparatus, a laser light source and a laser projection system, the speckle elimination apparatus comprising a diaphragm () and a &#xbc; wave plate group sequentially arranged on a laser beam optical path, the &#xbc; wave plate group comprising a first &#xbc; wave plate () and a second &#xbc; wave plate () having optical axis angles of 75&#xb0;-105&#xb0;, adjacent sides of the first &#xbc; wave plate () and the second &#xbc; wave plate () being closely arranged, the first &#xbc; wave plate () being arranged so as to allow a portion of an incident laser beam to pass through, the second &#xbc; wave plate () being arranged so as to allow the remainder of the incident laser beam to pass through, the portion of the incident laser beam being 25%-75% of the incident laser beam. The speckle elimination apparatus eliminates the phenomenon of laser speckle.

The present invention discloses a driving current correction method and apparatus for multiple laser devices, and a laser projector, A specific embodiment of the method includes in projection periods of n-th to (n+m&#x2212;1)-th pixel points: detecting light intensity information of a combined laser after being combined lasers emitted from in laser devices in a laser source by using a light sensor, and respectively acquiring actual light intensities of combined lasers when the n-th to the (n+m&#x2212;1)-th pixel points are projected according to an electric signal output by the light sensor, a number of the laser devices in the laser source being m; establishing a system of linear equations with in variables according to a driving current of each laser device and the actual light intensities of the combined lasers when the n-th to the (n+m&#x2212;1)-th pixel points are projected, and solving a corresponding relation between the driving current of the each laser device and an actual light intensity of the laser emitted from the each laser device; from a projection of a (n+m)-th pixel point: correcting the driving current of the each laser device according to a set light intensity of the each laser device and the corresponding relation between the driving current of the each laser device and the actual light intensity of the laser emitted from the each laser device. The implementation has a high consistency of detecting light intensity information that can be simply performed.

Growing community of inventors

Shandong, China

Lebao Yang