# US 9,521,382 B2 · Display apparatus capable of projecting different images on display areas > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,521,382 B2 - Document ID: US9521382B2 - Status: Granted - Kind: B2 - Application number: 14/333,111 - Filed: 2014-07-16 - Published: 2015-01-22 - Granted: 2016-12-13 - Earliest claimed: 2013-07-16 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Jaekwang Lee; Sangkeun Lee; Chanyoung Yoon - Web page: https://patentgrep.com/patent/US9521382B2 ## CPC - H04N 9/3129: {scanning a light beam on the display screen (scanning a light beam on a screen in displays other than projection devices G09G3/02; scanning systems in general G02B26/10; projectors using laser light sources in general H04N9/3161)} - G03B 21/2013: {Plural light sources} - G03B 21/2033: {LED or laser light sources} - G03B 21/28: Reflectors in projection beam {(in illumination beam G03B21/2066)} - G06F 3/017: {Gesture based interaction, e.g. based on a set of recognized hand gestures (interaction based on gestures traced on a digitiser G06F3/04883)} - G06F 3/1423: {controlling a plurality of local displays, e.g. CRT and flat panel display} - G09G 3/002: {to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT} - H04N 9/3147: {Multi-projection systems (video walls G06F3/1446)} - H04N 9/3161: {using laser light sources (using laser beams scanning the display screen H04N9/3129)} - G03B 33/04: by four or more separation records - G06F 3/1431: {using a single graphics controller} - H04N 13/363: using image projection screens (volumetric display H04N13/388) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) ## Abstract Disclosed is a display apparatus. The display apparatus includes a light source unit configured to output a visible light, a scanner configured to output a first projection image and a second projection image based on the visible light by implementing first direction scanning and second direction scanning, and a light path splitter configured to separate light paths of the first projection image and the second projection image from each other, so as to output the first projection image and the second projection image toward a first display area and a second display area respectively. The display apparatus is capable of projecting different images onto display areas. ## Claims ### Claim 1 An apparatus comprising: a light source configured to output visible light; a scanner positioned relative to the light source to receive the visible light, wherein the scanner is configured to output a first projection image and a second projection image based on the received visible light using respective first direction scanning and second direction scanning; and a light path splitter positioned relative to the scanner to receive the first projection image and the second projection image, wherein the light path splitter is configured to separate respective light paths of the first projection image and the second projection image from each other and output the first projection image toward a first display area and output the second projection image toward a second display area, wherein the visible light received by the scanner comprises first polarized visible light and second polarized visible light, and wherein the scanner is configured to output the first projection image based on the first polarized visible light, and output the second projection image based on the second polarized visible light, using the first direction scanning and the second direction scanning, and wherein the light path splitter includes a polarized beam splitter to output the first projection image toward the first display area, and to output the second projection image toward the second display area. ### Claim 2 (depends on 1) The apparatus according to claim 1, wherein the scanner outputs the first projection image and the second projection image during one frame section. ### Claim 3 (depends on 1) The apparatus according to claim 1, wherein the scanner varies an operating frame rate to increase spatial resolution of a scan area to which the first projection image and the second projection image are output, and wherein the light path splitter outputs the first projection image and the second projection image, each of which has a relative increase in spatial resolution, toward the first display area and the second display area respectively. ### Claim 4 (depends on 3) The apparatus according to claim 3, wherein the scanner varies at least one of vertical scanning speed, horizontal scanning speed, vertical angle, or horizontal angle to provide the increase in the spatial resolution of the scan area. ### Claim 5 (depends on 1) The apparatus according to claim 1, wherein the light source further outputs an output light to permit detection of a distance to an external object, and wherein the scanner outputs the first projection image, the second projection image, and the output light using the first direction scanning and the second direction scanning. ### Claim 6 (depends on 5) The apparatus according to claim 5, further comprising: a light detector configured to detect received light; and a processor configured to detect a distance from the apparatus to an external object, or motion of the external object relative to the apparatus, based upon the visible light output by the light source and the received light detected by the light detector. ### Claim 7 (depends on 1) The apparatus according to claim 1, wherein the scanner includes a first scanner and a second scanner, wherein the first scanner outputs the first projection image using the first direction scanning and the second direction scanning, and wherein the second scanner outputs the second projection image using the first direction scanning and the second direction scanning. ### Claim 8 (depends on 1) The apparatus according to claim 1, wherein the scanner outputs the first projection image and the second projection image during one frame section. ### Claim 9 (depends on 1) The apparatus according to claim 1, wherein the first polarized visible light comprises first polarized green, red, and blue lights, and the second polarized visible light comprises second polarized green, red, and blue lights. ### Claim 10 (depends on 9) The apparatus according to claim 9, wherein the light source outputs the first polarized visible light comprising the first polarized green, red, and blue lights, and wherein the apparatus further comprises: a polarized beam converter positioned relative to the light source to receive and convert the first polarized green, red, and blue lights into the second polarized green, red, and blue lights, and to output the second projection image based on the second polarized light, and wherein the polarized beam splitter transmits the first projection image based on the first polarized light, and reflects the second projection image based on the second polarized light. ### Claim 11 An apparatus comprising: a light source configured to output visible light; a scanner positioned relative to the light source to receive the visible light, wherein the scanner is configured to output a first projection image and a second projection image based on the received visible light using respective first direction scanning and second direction scanning; and a light path splitter positioned relative to the scanner to receive the first projection image and the second projection image, wherein the light path splitter is configured to separate respective light paths of the first projection image and the second projection image from each other and output the first projection image toward a first display area and output the second projection image toward a second display area, wherein the scanner receives the visible light comprising first visible light and a second visible light at a first frame rate, and outputs the first projection image and the second projection image at a second frame rate less than the first frame rate. ### Claim 12 (depends on 11) The apparatus according to claim 11, wherein the scanner outputs the first projection image and the second projection image separately, and wherein the light path splitter includes a mirror configured to reflect any one of the first projection image or the second projection image. ### Claim 13 (depends on 12) The apparatus according to claim 12, wherein the other one of the first projection image or the second projection image output from the scanner has a light path spaced apart from the mirror. ### Claim 14 (depends on 11) The apparatus according to claim 11, wherein the light source further outputs an output light for detection of a distance to an external object, and wherein the scanner outputs the first projection image, the second projection image, and the output light, using the first direction scanning and the second direction scanning. ### Claim 15 (depends on 11) The apparatus according to claim 11, wherein the light source outputs the visible light comprising first visible light having a wavelength band of a first group and second visible light having a wavelength band of a second group, wherein the scanner outputs a first projection image based on the first visible light having the wavelength band of the first group and the second projection image based on the second visible light having the wavelength band of the second group using the first direction scanning and the second direction scanning, and wherein the light path splitter includes a light wavelength splitter to output the first projection image having the wavelength band of the first group toward the first display area and to output the second projection image having the wavelength band of the second group toward the second display area. ### Claim 16 (depends on 15) The apparatus according to claim 15, wherein the light source outputs the first visible light comprising green, blue, and red lights having the wavelength band of the first group and outputs the second visible light comprising green, blue, and red lights having the wavelength band of the second group, and wherein the light wavelength splitter transmits the first projection image based on the wavelength band of the first group, and reflects the second projection image based on the wavelength band of the second group. ### Claim 17 (depends on 15) The apparatus according to claim 15, wherein the light source further outputs an output light for detection of a distance to an external object, and wherein the scanner outputs the first projection image, the second projection image, and the output light, using the first direction scanning and the second direction scanning.