公开(公告)号：US12135233B2

公开(公告)日：2024-11-05

申请号：US17406058

申请日：2021-08-18

Applicant: BENQ CORPORATION

Inventor： Shih-Pin Chen ,  Wen-Lun Chien ,  Chin-Fu Chiang ,  Chang-Sheng Lee

IPC: G01H3/08 ,  G01H17/00

Abstract: A vibration sensor senses vibrations generated by an object to generate a noise signal. A processor obtains a structure vibration level spectrum from the noise signal, uses equalization parameters and A-weighting parameters to adjust the structure vibration level spectrum to generate a sound pressure level spectrum, and uses the sound pressure level spectrum to calculate a noise value of the object.

公开(公告)号：US20220155137A1

公开(公告)日：2022-05-19

申请号：US17406058

申请日：2021-08-18

Applicant: BENQ CORPORATION

Inventor： Shih-Pin Chen ,  Wen-Lun Chien ,  Chin-Fu Chiang ,  Chang-Sheng Lee

IPC: G01H3/08

Abstract: A vibration sensor senses vibrations generated by an object to generate a noise signal. A processor obtains a structure vibration level spectrum from the noise signal, uses equalization parameters and A_weighting parameters to adjust the structure vibration level spectrum to generate a sound pressure level spectrum, and uses the sound pressure level spectrum to calculate a noise value of the object.

公开(公告)号：US11073422B2

公开(公告)日：2021-07-27

申请号：US16797021

申请日：2020-02-21

Applicant: BenQ Intelligent Technology (Shanghai) Co., Ltd ,  BENQ CORPORATION

Inventor： Shih-Pin Chen

IPC: G01J1/46 ,  G02B26/00 ,  G03B21/20 ,  G01J1/44

Abstract: A light detection circuit for a projector is provided. The light detection circuit includes: a light transistor for receiving and sensing reflected light from a side of a color wheel driving motor of the projector, wherein the side of the color wheel driving motor includes a dark region and a bright region; a bias unit coupled to the light transistor for providing a bias voltage; an operation amplifier including a positive input coupled to the bias unit, a negative input coupled to the light transistor and the bias unit, and an output, the base unit providing the bias voltage to the positive input; and a feedback resistor coupled between the negative input of the operation amplifier and the output, wherein, a resistance of the feedback resistor causes the light transistor to be operated in a linear region.