公开(公告)号：US11662579B2

公开(公告)日：2023-05-30

申请号：US16898773

申请日：2020-06-11

Applicant: GOOGLE LLC

Inventor： Shreyas Potnis ,  Kevin Orr ,  Kai Xu

IPC: G02B27/01 ,  G01R15/04 ,  G01R19/10 ,  G01R27/26 ,  G01R31/52 ,  F21V8/00

CPC classification number: G02B27/0149 ,  G01R15/04 ,  G01R19/10 ,  G01R27/26 ,  G01R31/52 ,  G02B6/0083 ,  G02B2027/0167

Abstract: A combiner lens system includes a lens and a lightguide in stack with the lens. The lightguide carries one or more electrically conductive traces. A detector circuit is electrically coupled to the one or more electrically conductive traces to form an electrical circuit. The detector circuit monitors the electrical circuit for an open circuit or a short circuit and generates an output signal that is indicative of a state of the electrical circuit.

公开(公告)号：US20230327401A1

公开(公告)日：2023-10-12

申请号：US18209793

申请日：2023-06-14

Applicant: GOOGLE LLC

Inventor： Kai Xu ,  Kevin Orr

IPC: H01S5/042

CPC classification number: H01S5/042 ,  G02B27/0172

Abstract: The present disclosure relates generally to a device, such as a wearable display device configured with a laser diode driver implementing dynamic voltage control for laser diodes. The laser diodes may include one or more of a red laser diode, a blue laser diode, and a green laser diode. The device may determine a load condition based on a frame to be displayed at the device, and determine a target voltage level for a laser diode operably coupled to the laser diode driver of the device based on the load condition (e.g., an image signal processor (ISP) frame buffer load). The device may generate the target voltage level for the laser diode based on a base voltage level. For example, the device may be configured with a voltage booster operably coupled to the laser diode driver to provide the target voltage level in addition to the base voltage level.

公开(公告)号：US11682880B2

公开(公告)日：2023-06-20

申请号：US17238781

申请日：2021-04-23

Applicant: GOOGLE LLC

Inventor： Kai Xu ,  Kevin Orr

IPC: H01S5/042 ,  G02B27/01

CPC classification number: H01S5/042 ,  G02B27/0172

Abstract: The present disclosure relates generally to a device, such as a wearable display device configured with a laser diode driver implementing dynamic voltage control for laser diodes. The laser diodes may include one or more of a red laser diode, a blue laser diode, and a green laser diode. The device may determine a load condition based on a frame to be displayed at the device, and determine a target voltage level for a laser diode operably coupled to the laser diode driver of the device based on the load condition (e.g., an image signal processor (ISP) frame buffer load). The device may generate the target voltage level for the laser diode based on a base voltage level. For example, the device may be configured with a voltage booster operably coupled to the laser diode driver to provide the target voltage level in addition to the base voltage level.

公开(公告)号：US20220344898A1

公开(公告)日：2022-10-27

申请号：US17238781

申请日：2021-04-23

Applicant: GOOGLE LLC

Inventor： Kai Xu ,  Kevin Orr

IPC: H01S5/042

Abstract: The present disclosure relates generally to a device, such as a wearable display device configured with a laser diode driver implementing dynamic voltage control for laser diodes. The laser diodes may include one or more of a red laser diode, a blue laser diode, and a green laser diode. The device may determine a load condition based on a frame to be displayed at the device, and determine a target voltage level for a laser diode operably coupled to the laser diode driver of the device based on the load condition (e.g., an image signal processor (ISP) frame buffer load). The device may generate the target voltage level for the laser diode based on a base voltage level. For example, the device may be configured with a voltage booster operably coupled to the laser diode driver to provide the target voltage level in addition to the base voltage level.

公开(公告)号：US20210157140A1

公开(公告)日：2021-05-27

申请号：US16898773

申请日：2020-06-11

Applicant: GOOGLE LLC

Inventor： Shreyas Potnis ,  Kevin Orr ,  Kai Xu

IPC: G02B27/01 ,  F21V8/00 ,  G01R31/52 ,  G01R19/10 ,  G01R15/04 ,  G01R27/26

Abstract: A combiner lens system includes a lens and a lightguide in stack with the lens. The lightguide carries one or more electrically conductive traces. A detector circuit is electrically coupled to the one or more electrically conductive traces to form an electrical circuit. The detector circuit monitors the electrical circuit for an open circuit or a short circuit and generates an output signal that is indicative of a state of the electrical circuit.