# US 8,783,890 B2 · Illumination device, display device, television receiving device, and LED light source utilizing square shaped emission distributions > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,783,890 B2 - Document ID: US8783890B2 - Status: Granted - Kind: B2 - Application number: 13/805,731 - Filed: 2011-04-21 - Published: 2013-04-18 - Granted: 2014-07-22 - Earliest claimed: 2010-07-01 - Assignees: Sharp Kabushiki Kaisha - Applicants: Nobuhiro Kasai - Inventors: Nobuhiro Kasai - Web page: https://patentgrep.com/patent/US8783890B2 ## CPC - G02F 1/133603: {with LEDs} - G02F 1/133608: {including particular frames or supporting means} - G02F 1/133611: {including means for improving the brightness uniformity} - H10W 90/00: Package configurations - G02F 1/133605: {including specially adapted reflectors} - G02F 1/133607: {the light controlling member including light directing or refracting elements, e.g. prisms or lenses} - G02F 1/133613: {characterized by the sequence of light sources} - G02F 1/133614: {using photoluminescence, e.g. phosphors illuminated by UV or blue light} - H10H 20/855: Optical field-shaping means, e.g. lenses - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS ## Abstract Disclosed are an illumination device to be located immediately below an object to be illuminated, wherein a plurality of point-like light sources are arranged, and a display device provided with the illumination device. Even in a structure wherein the light emitted from point-like light sources is diffused and planarly emitted, in order to provide an illumination device which can uniformly and planarly emit the light without reducing the light intensity at the overlapped portion of the light emitted from the point-like light sources, point-like light sources (LED light sources) each diffusing the light to be emitted in a square-shaped light emission distribution, and an illumination device (LED backlight device) wherein the point-like light sources are arranged in a planar manner so that the square-shaped light emission distributions of the light diffused by the point-like light sources are overlapped in parallel. ## Claims ### Claim 1 An illumination device, comprising: a plurality of point-like light sources; and a mounting substrate on which the point-like light sources are mounted, wherein light emitted from each of the point-like light sources is diffused to have a square-shaped light emission distribution, and each of the point-like light sources is constituted of an LED package including an LED chip as a light source, a sub mount substrate on which the LED chip is mounted, and a sealing resin for sealing the LED chip. ### Claim 2 (depends on 1) The illumination device according to claim 1, wherein the plurality of point-like light sources are arranged linearly in a longitudinal direction of the mounting substrate so that the square-shaped light emission distributions are overlapped in parallel. ### Claim 3 (depends on 1) The illumination device according to claim 1, wherein the plurality of point-like light sources are arranged in a lattice pattern, light emission distributions of the point-like light sources neighboring in a up and down direction and in a left and right direction are overlapped in parallel at each side of the square shape, and diffused light rays of four point-like light sources arranged in a lattice overlap with each other also at the center thereof. ### Claim 4 (depends on 1) The illumination device according to claim 1, wherein the plurality of point-like light sources are mounted at equal spaces on the mounting substrate. ### Claim 5 (depends on 1) The illumination device according to claim 1, wherein a plurality of mounting substrates are arranged in a plurality of rows along a longitudinal direction. ### Claim 6 (depends on 5) The illumination device according to claim 5, wherein the plurality of point-like light sources are arranged in a lattice pattern on the plurality of arranged mounting substrates. ### Claim 7 (depends on 1) The illumination device according to claim 1, wherein the plurality of point-like light sources are arranged in a lattice pattern on the mounting substrate on which the point-like light sources are mounted. ### Claim 8 (depends on 1) The illumination device according to claim 1, wherein each of the point-like light sources further includes a diffusing lens which diffuses the light emitted from the LED chip and through the sealing resin to have the square-shaped light emission distribution. ### Claim 9 (depends on 1) The illumination device according to claim 1, wherein the sealing resin is set in a shape such that the light emitted from the LED chip is diffused to have the square-shaped light emission distribution. ### Claim 10 (depends on 1) The illumination device according to claim 1, wherein a plurality of LED chips are mounted on the sub mount substrate via a support base having inclined planes so that the plurality of LED chips have different light emission directions. ### Claim 11 (depends on 10) The illumination device according to claim 10, wherein the support base is an inverted V-shaped support base having two inclined planes. ### Claim 12 (depends on 10) The illumination device according to claim 10, wherein the support base is a triangular pyramid support base having three inclined planes. ### Claim 13 (depends on 10) The illumination device according to claim 10, wherein the support base is a square pyramid support base having four inclined planes. ### Claim 14 (depends on 1) A display device comprising: an illumination device according to claim 1; and a display panel which performs a display by using light from the illumination device. ### Claim 15 (depends on 14) The display device according to claim 14, wherein the display panel is a liquid crystal panel using liquid crystal. ### Claim 16 (depends on 14) A television receiving device comprising the display device according to claim 14. ### Claim 17 An LED light source for use as a point-like light source included in an illumination device, the illumination device comprising a plurality of point-like light sources and a mounting substrate on which the point-like light sources are mounted, wherein light emitted from each of the point-like light sources is diffused to have a square-shaped light emission distribution, the LED light source being constituted of an LED package comprising: an LED chip as a light source; a sub mount substrate on which the LED chip is mounted; and a sealing resin for sealing the LED chip, wherein emitted light from the LED light source is diffused to have the square-shaped light emission distribution.