# US 12,117,884 B2 · Optical sensor device having sensing pixels and self-powered pixels > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,117,884 B2 - Document ID: US12117884B2 - Status: Granted - Kind: B2 - Application number: 18/222,468 - Filed: 2023-07-16 - Published: 2023-11-09 - Granted: 2024-10-15 - Earliest claimed: 2016-01-27 - Applicants: PixArt Imaging Inc. - Inventors: Guo-Zhen Wang - Web page: https://patentgrep.com/patent/US12117884B2 ## CPC - G06F 1/3259: {Power saving in cursor control device, e.g. mouse, joystick, trackball} - G06F 3/0317: {in co-operation with a patterned surface, e.g. absolute position or relative movement detection for an optical mouse or pen positioned with respect to a coded surface} - G06F 3/0354: with detection of two-dimensional [2D] relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks - G06F 3/03543: {Mice or pucks (G06F3/03541 takes precedence)} - G06F 3/038: Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry - Y02D 10/00: Energy efficient computing, e.g. low power processors, power management or thermal management - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract A sensor device includes an image sensing array, a frame buffer, a first read line, a second read line and an energy accumulator. The image sensing array is configured to sense reflected light from a working surface and includes a plurality of sensing pixels and a plurality of self-powered pixels. The sensing pixels respectively output image data according to the sensed reflected light. The self-powered pixels respectively output photocurrent according to the sensed reflected light. The first read line is coupled between the sensing pixels and the frame buffer. The second read line is coupled between the self-powered pixels and the frame buffer. The energy accumulator stores electrical energy of the photocurrent via a charge path between the self-powered pixels and the energy accumulator. ## Claims ### Claim 1 An optical sensor device, comprising: a housing; an image sensing array, disposed in the housing, and the image sensing array comprising: a plurality of sensing pixels; and a plurality of self-powered pixels, a frame buffer; an energy accumulator; first readout lines coupled between the plurality of self-powered pixels and the energy accumulator; and second readout lines coupled between the plurality of self-powered pixels and the frame buffer, wherein the sensing pixels and the self-powered pixels are arranged at interleaved positions of the image sensor array. ### Claim 2 (depends on 1) The optical sensor device as claimed in claim 1, further comprising: a switch configured to couple the frame buffer to the plurality of self-powered pixels or the plurality of sensing pixels. ### Claim 3 (depends on 1) The optical sensor device as claimed in claim 1, further comprising a light source configured to provide light to be sensed by the plurality of self-powered pixels to generate photocurrent. ### Claim 4 (depends on 3) The optical sensor device as claimed in claim 3, wherein the photocurrent is further provided to the light source. ### Claim 5 (depends on 1) The optical sensor device as claimed in claim 1, wherein the first readout lines and the second readout lines are configured to read the plurality of self-powered pixels in different operation modes. ### Claim 6 (depends on 1) The optical sensor device as claimed in claim 1, wherein the plurality of sensing pixels and the plurality of self-powered pixels are arranged at interleaved rows, at interleaved columns or as a checkerboard pattern. ### Claim 7 An optical sensor device, comprising: a housing; and an image sensing array, disposed in the housing, and the image sensing array comprising: a plurality of sensing pixels, each of the sensing pixels being configured to output image data for calculating displacement; and a plurality of self-powered pixels, each of the self-powered pixels being configured to output photocurrent for being reused, wherein the sensing pixels and the self-powered pixels are arranged at interleaved positions of the image sensor array, and a frame rate of the plurality of self-powered pixels is lower than that of the plurality of sensing pixels. ### Claim 8 (depends on 7) The optical sensor device as claimed in claim 7, further comprising: a frame buffer; and a switch configured to couple the frame buffer to the plurality of self-powered pixels or the plurality of sensing pixels. ### Claim 9 (depends on 7) The optical sensor device as claimed in claim 7, further comprising a light source configured to provide light to be sensed by the plurality of self-powered pixels to generate the photocurrent. ### Claim 10 (depends on 7) The optical sensor device as claimed in claim 7, wherein the photocurrent is further provided to the light source. ### Claim 11 (depends on 7) The optical sensor device as claimed in claim 7, further comprising: a frame buffer; an energy accumulator; first readout lines coupled between the plurality of self-powered pixels and the energy accumulator; and second readout lines coupled between the plurality of self-powered pixels and the frame buffer. ### Claim 12 (depends on 11) The optical sensor device as claimed in claim 11, wherein the first readout lines and the second readout lines are configured to read the plurality of self-powered pixels in different operation modes. ### Claim 13 An optical sensor device, comprising: a housing; and an image sensing array, disposed in the housing, and the image sensing array comprising: a plurality of sensing pixels, each of the sensing pixels being configured to output image data for calculating displacement; and a plurality of self-powered pixels, each of the self-powered pixels being configured to output photocurrent for being reused, wherein the self-powered pixels are arranged at a plurality of regions of the image sensor array and each of the plurality of regions includes multiple self-powered pixels, and the sensing pixels are arranged at the rest pixels of the image sensor array, and a frame rate of the plurality of self-powered pixels is lower than that of the plurality of sensing pixels. ### Claim 14 (depends on 13) The optical sensor device as claimed in claim 13, further comprising: a frame buffer; and a switch configured to couple the frame buffer to the plurality of self-powered pixels or the plurality of sensing pixels. ### Claim 15 (depends on 13) The optical sensor device as claimed in claim 13, further comprising a light source configured to provide light to be sensed by the plurality of self-powered pixels to generate the photocurrent. ### Claim 16 (depends on 15) The optical sensor device as claimed in claim 15, wherein the photocurrent is further provided to the light source. ### Claim 17 (depends on 13) The optical sensor device as claimed in claim 13, further comprising: a frame buffer; an energy accumulator; first readout lines coupled between the plurality of self-powered pixels and the energy accumulator; and second readout lines coupled between the plurality of self-powered pixels and the frame buffer. ### Claim 18 (depends on 17) The optical sensor device as claimed in claim 17, wherein the first readout lines and the second readout lines are configured to read the plurality of self-powered pixels in different operation modes.