# US 9,039,219 B2 · Display apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,039,219 B2 - Document ID: US9039219B2 - Status: Granted - Kind: B2 - Application number: 13/796,840 - Filed: 2013-03-12 - Published: 2013-09-19 - Granted: 2015-05-26 - Earliest claimed: 2012-03-19 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Tasuku Uchimi - Web page: https://patentgrep.com/patent/US9039219B2 ## CPC - F21V 29/50: Cooling arrangements (air-treatment systems dissipating or using the heat of lighting fixtures F24F3/056) - H05K 7/20136: {Forced ventilation, e.g. by fans (H05K7/202 takes precedence)} - H05K 7/20972: {Forced ventilation, e.g. on heat dissipaters coupled to components} - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract A display apparatus includes a display unit; a chassis member provided at the rear side of the display unit; a fan attached to the chassis member; a first circuit substrate that is provided between the display unit and the chassis member and of which the component-mounting surface is arranged at a position facing the fan side; and a second circuit substrate that is provided between the display unit and the chassis member and of which the component-mounting surface is arranged to face the display unit side. ## Claims ### Claim 1 A display apparatus comprising: a display unit; a chassis member provided at the rear side of the display unit; a fan attached to the chassis member; a first circuit substrate that is provided between the display unit and the chassis member and of which the component-mounting surface is arranged at a position facing the fan side; and a second circuit substrate that is provided between the display unit and the chassis member and of which the component-mounting surface is arranged to face the display unit side. ### Claim 2 (depends on 1) The display apparatus according to claim 1, wherein the spacing between the first circuit substrate and the display unit is smaller than the spacing between the second circuit substrate and the display unit. ### Claim 3 (depends on 2) The display apparatus according to claim 2, wherein the display unit further includes a display panel, a light source unit that irradiates the display panel with light, and a heat radiating portion that dissipates heat generated by the light source unit, and wherein the spacing between the first circuit substrate and the heat radiating portion is smaller than the spacing between the second circuit substrate and the heat radiating portion. ### Claim 4 (depends on 3) The display apparatus according to claim 3, wherein the light source unit further includes a surface light source unit that is located on the rear side of the display panel and emits light, and the heat radiating portion is a heat sink that dissipates heat generated by the surface light source unit. ### Claim 5 (depends on 4) The display apparatus according to claim 4, wherein the surface light source unit includes a substrate with a plurality of light-emitting elements mounted thereon and the heat sink is brought into thermal contact with the component non-mounting surface of the substrate with the plurality of light-emitting elements. ### Claim 6 (depends on 1) The display apparatus according to claim 1, wherein the display apparatus includes the second circuit substrate in plural, and the component-mounting surfaces of the second circuit substrates are arranged symmetrically about the center line of a vertical direction passing through the central portion of the first circuit substrate and arranged so that the component-mounting surfaces face the display unit side. ### Claim 7 (depends on 1) The display apparatus according to claim 1, wherein a plurality of vent holes are formed on a side part or a lower part of the chassis member, and the second circuit substrate is arranged at the side of or below the first circuit substrate. ### Claim 8 (depends on 7) The display apparatus according to claim 7, wherein the plurality of vent holes are formed on the chassis member along a direction orthogonal to the center line of the vertical direction, and a plurality of connection members that connects the light source unit provided in the display unit with the plurality of second circuit substrates is arranged along a direction parallel to the center line of the vertical direction. ### Claim 9 (depends on 7) The display apparatus according to claim 7, wherein the plurality of vent holes are formed on the chassis member along a direction parallel to the center line of the vertical direction, and a plurality of connection members that connects the light source unit provided in the display unit with the plurality of second circuit substrates is arranged along a direction orthogonal to the center line of the vertical direction. ### Claim 10 (depends on 7) The display apparatus according to claim 7, wherein, when the display apparatus is viewed from the opposite side to the display face of the display panel, a heat radiating portion for dissipating heat generated by the display unit includes an auxiliary heat sink between the plurality of vent holes and the fan. ### Claim 11 (depends on 7) The display apparatus according to claim 7, wherein the plurality of vent holes are formed on the side part of the chassis member along a direction parallel to the center line of the vertical direction, the second circuit substrate is arranged at the side of the first circuit substrate. ### Claim 12 (depends on 7) The display apparatus according to claim 7, wherein the plurality of vent holes are formed on the side part of the chassis member along a direction parallel to the center line of the vertical direction and are formed on the low part of the chassis member along a direction orthogonal to the center line of the vertical direction, the second circuit substrate is arranged at the side of the first circuit substrate. ### Claim 13 (depends on 7) The display apparatus according to claim 7, wherein the plurality of vent holes are formed on the low part of the chassis member along a direction orthogonal to the center line of the vertical direction, the second circuit substrate is arranged below the first circuit substrate. ### Claim 14 (depends on 7) The display apparatus according to claim 7, wherein the plurality of vent holes are formed on the low part of the chassis member along a direction orthogonal to the center line of the vertical direction and are formed on the side part of the chassis member along a direction parallel to the center line of the vertical direction, the second circuit substrate is arranged below the first circuit substrate. ### Claim 15 (depends on 7) The display apparatus according to claim 7, wherein the spacing between the first circuit substrate and the display unit is smaller than the spacing between the second circuit substrate and the display unit. ### Claim 16 (depends on 15) The display apparatus according to claim 15, wherein air that has flowed inside from the plurality of vent holes passes through the upper part of the component-mounting surface of the first circuit substrate and is discharged from the vent holes. ### Claim 17 (depends on 15) The display apparatus according to claim 15, wherein air that has flowed inside from the plurality of vent holes passes through the upper part of the component-mounting surface of the second circuit substrate and is discharged from the vent holes. ### Claim 18 (depends on 15) The display apparatus according to claim 15, wherein air that has flowed inside from the plurality of vent holes passes through the upper part of the component-mounting surface of the first and second circuit substrates and is discharged from the vent holes. ### Claim 19 (depends on 1) The display apparatus according to claim 1, wherein the display unit comprises a display panel and a light source unit which irradiates the display panel with light, the first circuit substrate is a display control substrate that performs display control of the display panel, and the second circuit substrate is a drive substrate that drives the light source unit. ### Claim 20 (depends on 1) The display apparatus according to claim 1, wherein mounting components are mounted on both sides of the first circuit substrate, and the component-mounting surface of the first circuit substrate having a larger total area or a larger total volume of the mounting components is defined as a main mounting surface. ### Claim 21 (depends on 1) The display apparatus according to claim 1, wherein mounting components are mounted on both sides of the second circuit substrate, and the component-mounting surface of the second circuit substrate having a larger total area or a larger total volume of the mounting components is defined as a main mounting surface. ### Claim 22 (depends on 1) The display apparatus according to claim 1, wherein mounting components are mounted on both sides of the first and second circuit substrates, respectively, and each of the component-mounting surfaces of the first and second circuit substrates having a larger total area or a larger total volume of the mounting components is defined as a main mounting surface.