# US 8,772,802 B2 · Light emitting device with transparent plate > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,772,802 B2 - Document ID: US8772802B2 - Status: Granted - Kind: B2 - Application number: 12/610,371 - Filed: 2009-11-02 - Published: 2010-08-19 - Granted: 2014-07-08 - Earliest claimed: 2009-02-18 - Assignees: Everlight Electronics Co., Ltd. - Applicants: Shin-Chang Tsai; Chia-Hao Liang; Pei-Husan Chen - Inventors: Shin-Chang Tsai; Chia-Hao Liang; Pei-Husan Chen - Web page: https://patentgrep.com/patent/US8772802B2 ## CPC - H10H 20/855: Optical field-shaping means, e.g. lenses - H10H 20/8506: {Containers} - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS ## Abstract A light emitting device includes a carrier, a light emitting element disposed and electrically connected to the carrier, and a transparent plate disposed on the carrier and including a flat-portion and a lens-portion. The lens-portion covers the light emitting element and has a light incident surface, a light emitting surface, a first side surface and a second side surface. The light emitting element is suitable for emitting a light beam. A first partial beam of the light beam passes through the light incident surface and leaves from the light emitting surface. A second partial beam of the light beam passes through the light incident surface and is transmitted to the first side surface or the second side surface, and the first side surface or the second side surface reflects at least a part of the second partial beam of the light beam to be passed through the light emitting surface. ## Claims ### Claim 1 A light emitting device, comprising: a carrier; a light emitting element, disposed on the carrier and electrically connected to the carrier; and a transparent plate, disposed on the carrier, the transparent plate comprising: a flat-portion, having an upper surface and a lower surface relative to the upper surface, and the lower surface directly disposed on the carrier; a lens-portion, covering the light emitting element, and having a light incident surface, a light emitting surface relative to the light incident surface, a first side surface connecting the upper surface and the light emitting surface and a second side surface opposite to the first side surface and connecting the upper surface and the light emitting surface, a slope of the first side surface and a slope of the second side surface being substantially different, wherein at least one of the first side surface and the second side surface is a plane surface, wherein the light emitting element is suitable for emitting a light beam, a first partial beam of the light beam passes through the light incident surface and leaves from the light emitting surface, a second partial beam of the light beam passes through the light incident surface and is transmitted to the first side surface or the second side surface, and the first side surface or the second side surface reflects at least a part of the second partial beam of the light beam to be passed through the light emitting surface. ### Claim 2 (depends on 1) The light emitting device as claimed in claim 1, wherein the first side surface and the second side surface are planes. ### Claim 3 (depends on 2) The light emitting device as claimed in claim 2, wherein a tilting angle of the first side surface relative to the upper surface and a tilting angle of the second side surface relative to the upper surface are substantially different. ### Claim 4 (depends on 1) The light emitting device as claimed in claim 1, wherein the first side surface and the second side surface are respectively a plane and a curved surface. ### Claim 5 (depends on 1) The light emitting device as claimed in claim 1, wherein the light incident surface is a curved surface concaving towards the light emitting surface. ### Claim 6 (depends on 1) The light emitting device as claimed in claim 1, wherein a material of the transparent plate comprises polymethyl methacrylate. ### Claim 7 (depends on 1) The light emitting device as claimed in claim 1, wherein the transparent plate is disposed on the carrier by adhering, screwing, or locking. ### Claim 8 (depends on 1) The light emitting device as claimed in claim 1, wherein the flat portion of the transparent plate further comprises a trench which is disposed around the lower surface, and the trench is circularly disposed around the light emitting element. ### Claim 9 (depends on 8) The light emitting device as claimed in claim 8, wherein a waterproof gel layer is disposed within the trench. ### Claim 10 (depends on 1) The light emitting device as claimed in claim 1, wherein the light emitting element comprises a surface mount device (SMD) light emitting diode (LED). ### Claim 11 A light emitting device, comprising: a carrier; a light emitting element, disposed on the carrier and electrically connected to the carrier; a transparent plate, disposed on the carrier, the transparent plate comprising: a flat-portion, having an upper surface and a lower surface relative to the upper surface, the lower surface directly disposed on the carrier; a lens-portion, covering the light emitting element, having a light incident surface and a plane surface and a positive camber connected to the upper surface, a curvature of the plane surface and a curvature of the positive camber being substantially different, wherein the light emitting element is suitable for emitting a light beam, a first partial beam of the light beam passes through the light incident surface and leaves the positive camber, a second partial beam of the light beam passes through the light incident surface and is transmitted to the plane surface, and the plane surface reflects at least a part of the second partial beam of the light beam to be passed through the positive camber. ### Claim 12 (depends on 11) The light emitting device as claimed in claim 11, wherein the light incident surface is a curved surface concaving towards the positive camber. ### Claim 13 (depends on 11) The light emitting device as claimed in claim 11, wherein a curvature of the light incident surface and a curvature of the positive camber are substantially different. ### Claim 14 (depends on 11) The light emitting device as claimed in claim 11, wherein a material of the transparent plate comprises polymethyl methacrylate. ### Claim 15 (depends on 11) The light emitting device as claimed in claim 11, wherein the transparent plate is disposed on the carrier by adhering, screwing, or locking. ### Claim 16 (depends on 11) The light emitting device as claimed in claim 11, wherein the flat portion of the transparent plate further comprises a trench which is disposed around the lower surface, and the trench is circularly disposed around the light emitting element. ### Claim 17 (depends on 16) The light emitting device as claimed in claim 16, wherein a waterproof gel layer is disposed within the trench. ### Claim 18 (depends on 11) The light emitting device as claimed in claim 11, wherein the light emitting element comprises a surface mount device (SMD) light emitting diode (LED). ### Claim 19 A light emitting device, comprising: a carrier; a light emitting element, disposed on the carrier and electrically connected to the carrier; and a transparent plate, disposed on the carrier, the transparent plate comprising: a flat-portion, having an upper surface and a lower surface relative to the upper surface, and the lower surface directly disposed on the carrier; a lens-portion, covering the light emitting element, and having a light incident surface, a light emitting surface relative to the light incident surface, a first side surface connecting the upper surface and the light emitting surface and a second side surface opposite to the first side surface and connecting the upper surface and the light emitting surface, a slope of the first side surface and a slope of the second side surface being substantially different, wherein at least one of the first side surface and the second side surface is a plane surface.