# US 2014/0191959 A1 · Pointing system and display having improved operable range > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0191959 A1 - Document ID: US20140191959A1 - Status: Published application - Kind: A1 - Application number: 14/096,279 - Filed: 2013-12-04 - Published: 2014-07-10 - Earliest claimed: 2013-01-09 - Assignees: Pixart Imaging Inc. - Applicants: Pixart Imaging Inc. - Inventors: MING-TSAN KAO; CHIA-CHEUN LIANG - Web page: https://patentgrep.com/patent/US20140191959A1 ## CPC - G06F 3/0346: with detection of the device orientation or free movement in a three-dimensional [3D] space, e.g. 3D mice, 6-DOF [six degrees of freedom] pointers using gyroscopes, accelerometers or tilt-sensors - G06F 3/0304: {Detection arrangements using opto-electronic means (constructional details of pointing devices not related to the detection arrangement using opto-electronic means G06F3/033; optical digitisers G06F3/042)} - G06F 3/0308: {comprising a plurality of distinctive and separately oriented light emitters or reflectors associated to the pointing device, e.g. remote cursor controller with distinct and separately oriented LEDs at the tip whose radiations are captured by a photo-detector associated to the screen} - 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 3/0325: {using a plurality of light emitters or reflectors or a plurality of detectors forming a reference frame from which to derive the orientation of the object, e.g. by triangulation or on the basis of reference deformation in the picked up image} - G06F 3/033: Pointing devices displaced or positioned by the user {, e.g. mice, trackballs, pens or joysticks}; Accessories therefor (digitisers characterised by the transducing means G06F3/041) - 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: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract There is provided a pointing system including an image sensor, a plurality of reference marks and a processing unit. The image sensor is configured to capture image frames containing at least one reference mark image of the reference marks. The processing unit is configured to recognize an image number of the reference mark image and calculate an aiming point coordinate according to a positioning algorithm associated with the image number. ## Claims ### Claim 1 A pointing system, comprising: a plurality of reference marks illuminating with an identifiable spectrum; and a remote controller configured to capture an image frame containing at least one reference mark image of the reference marks and perform pointer positioning according to a positioning algorithm associated with an image number of the reference mark image in the image frame. ### Claim 2 (depends on 1) The pointing system as claimed in claim 1, wherein the reference marks are integrated with a display device having a display screen. ### Claim 3 (depends on 1) The pointing system as claimed in claim 1, wherein the remote controller further comprises an accelerometer. ### Claim 4 (depends on 1) The pointing system as claimed in claim 1, wherein the remote controller comprises a processing unit configured to execute the positioning algorithm associated with different image numbers. ### Claim 5 (depends on 4) The pointing system as claimed in claim 4, wherein the processing unit executes one of the positioning algorithms associated with the image number of 1-4; and when the image number is larger than 4, the processing unit performs the pointer positioning according to the positioning algorithm associated with the image number of 4. ### Claim 6 (depends on 1) The pointing system as claimed in claim 1, further comprising a modulation unit configured to modulate at least one of an illumination frequency and an illumination brightness value of the reference marks. ### Claim 7 (depends on 1) The pointing system as claimed in claim 1, wherein the remote controller further distinguishes different reference marks and distinguishes the reference marks from ambient light according to features of the reference mark images. ### Claim 8 A display system, comprising: a display device showing a cursor; a plurality of reference marks illuminating with an identifiable spectrum; and a remote controller configured to capture an image frame containing at least one reference mark image of the reference marks, calculate and output a cursor coordinate of the cursor according to a positioning algorithm associated with an image number of the reference mark image in the image frame. ### Claim 9 (depends on 8) The display system as claimed in claim 8, wherein the reference marks are integrated with or separated from the display device. ### Claim 10 (depends on 8) The display system as claimed in claim 8, wherein the remote controller further comprises an accelerometer. ### Claim 11 (depends on 8) The display system as claimed in claim 8, wherein the remote controller comprises a processing unit configured to execute the positioning algorithm associated with different image numbers. ### Claim 12 (depends on 11) The display system as claimed in claim 11, wherein the processing unit executes one of the positioning algorithms associated with the image number of 1-4; and when the image number is larger than 4, the processing unit calculates and outputs the cursor coordinate according to the positioning algorithm associated with the image number of 4. ### Claim 13 (depends on 8) The display system as claimed in claim 8, further comprising a modulation unit configured to modulate at least one of an illumination frequency and an illumination brightness value of the reference marks. ### Claim 14 (depends on 8) The display system as claimed in claim 8, wherein the remote controller further distinguishes different reference marks and distinguishes the reference marks from ambient light according to features of the reference mark images. ### Claim 15 A pointing system, comprising: a plurality of reference marks illuminating with an identifiable spectrum; and a remote controller configured to capture an image frame containing at least one reference mark image of the reference marks, recognize a reference mark image number, output a pointing coordinate according to the image frame when the reference mark image number is equal to a reference mark number of the reference marks, and output a relative displacement according to the image frame when the reference mark image number is smaller than the reference mark number. ### Claim 16 (depends on 15) The pointing system as claimed in claim 15, wherein when the reference mark image number is smaller than the reference mark number and larger than 1, the remote controller calculates the relative displacement according to one of the reference mark images or an average position of the reference mark images in the image frame. ### Claim 17 (depends on 15) The pointing system as claimed in claim 15, wherein the reference mark number is 4. ### Claim 18 (depends on 15) The pointing system as claimed in claim 15, wherein the remote controller further comprises an accelerometer. ### Claim 19 (depends on 15) The pointing system as claimed in claim 15, further comprising a modulation unit configured to modulate at least one of an illumination frequency and an illumination brightness value of the reference marks. ### Claim 20 (depends on 15) The pointing system as claimed in claim 15, wherein the remote controller further distinguishes different reference marks and distinguishes the reference marks from ambient light according to features of the reference mark images.