# US 11,028,983 B2 · Downlight apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,028,983 B2 - Document ID: US11028983B2 - Status: Granted - Kind: B2 - Application number: 16/235,187 - Filed: 2018-12-28 - Published: 2019-07-04 - Granted: 2021-06-08 - Earliest claimed: 2017-12-28 - Assignees: Xiamen Eco Lighting Co. Ltd. - Applicants: Xiamen Eco Lighting Co. Ltd. - Inventors: Jinying Ye; Qiqing Yu - Web page: https://patentgrep.com/patent/US11028983B2 ## CPC - F21S 8/024: {intended to be recessed in a wall or like vertical structure, e.g. building facade} - F21V 23/04: the elements being switches (safety devices F21V25/00) - F21S 8/026: {intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling} - F21V 7/04: Optical design - F21V 23/007: {enclosed in a casing} - F21V 23/0435: {activated by remote control means} - F21V 29/505: of reflectors - F21V 29/507: of means for protecting lighting devices from damage, e.g. housings - F21V 29/70: characterised by passive heat-dissipating elements, e.g. heat-sinks - F21Y 2113/13: comprising an assembly of point-like light sources - F21Y 2115/10: Light-emitting diodes [LED] - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED ## Abstract A LED downlight apparatus includes a light source plate, a heat sink, a reflective cup and a driver container. The reflective cup reflects light of the light source plate and the heat sink is arranged between the driver container and the light source plate. ## Claims ### Claim 1 A downlight apparatus, comprising: a light source plate mounted with a first set of LED chips and a second set of LED chips, the color temperature of the first set of LED chips being different from the second set of LED chips; a driver box with a top driver box and a bottom driver box for containing a driver plate mounted with a driver circuit for receiving a color temperature setting to adjust a light ratio between the first set of LED chips and the second set of LED chips, the top driver box comprising a thin hole and a sliding groove; a switch button with a switch socket, wherein the switch button has a button top with only grooves on a surface of a button plate for a user to operate; a switch unit mounted on the driver plate with a lever protruding upwardly inserting into the switch socket, the switch button being disposed on a top side of the top driver box and the switch unit being disposed on a bottom side of the top driver box, the switch button being capable of sliding along the sliding groove limiting by the thin hole, wherein a position of the switch button with respect to the sliding groove causes the driver circuit to generate a corresponding driving ratio to the first set of LED chips and the second set of LED chips, wherein the driver circuit comprises a PWM controller for adjusting a first duty ratio of the first LED chips and a second duty ratio of the second LED chips to change a mixed color temperature of the first set of LED chips and the second set of LED chips, wherein summation of the first duty ratio and the second duty ratio is 100%, wherein when the first set of LED chips are turned on, the second set of LED chips are turned off, wherein the driver circuit comprises a wireless circuit, an external command from an external device is sent to the wireless circuit to disable a function of the switch unit, wherein when the switch unit is disabled, a position change of the switch button does not change the corresponding driving ratio of the first set of LED chips and the second set of LED chips. ### Claim 2 (depends on 1) The downlight apparatus of claim 1, wherein there are multiple candidate positions for the switch button to be moved, corresponding to multiple corresponding color temperatures. ### Claim 3 (depends on 1) The downlight apparatus of claim 1, wherein the driver box has a bottom side and a lateral wall, at least a part of the lateral wall of the driver container engages a heat contact part of a heat sink. ### Claim 4 (depends on 3) The downlight apparatus of claim 3, wherein at least another part of the lateral wall is not contacting the heat sink. ### Claim 5 (depends on 3) The downlight apparatus of claim 3, further comprising a reflective cup, wherein a heat sink height of the heat sink is less than 50% of the reflective cup height of a reflective cup. ### Claim 6 (depends on 5) The downlight apparatus of claim 5, wherein the reflective cup and the heat sink are circular shape structures. ### Claim 7 (depends on 5) The downlight apparatus of claim 5, wherein the inner surface of the reflective cup is disposed with polygonal structures. ### Claim 8 (depends on 7) The downlight apparatus of claim 7, wherein the polygonal structures have convex protruding surface. ### Claim 9 (depends on 8) The downlight apparatus of claim 8, wherein the polygonal structures have concave surface. ### Claim 10 (depends on 1) The downlight apparatus of claim 1, wherein a heat sink forms a concave cup facing upwardly and the light source plate is placed in the concave cup. ### Claim 11 (depends on 10) The downlight apparatus of claim 10, wherein the reflective cup comprises a streamline bell shape structure. ### Claim 12 (depends on 1) The downlight apparatus of claim 1, further comprising: a heat conductive layer disposed between the light source plate and a heat sink. ### Claim 13 (depends on 12) The downlight apparatus of claim 12, wherein the heat sink is made of metal material. ### Claim 14 (depends on 13) The downlight apparatus of claim 13, wherein the heat sink has a plurality of protruding bars on a surface of the heat sink to increase the rigidity of the heat sink and a reflective cover. ### Claim 15 (depends on 1) The downlight apparatus of claim 1, wherein the light source plate engages an edge of a reflective cup.