# US 2023/0422368 A1 · Electronic device and control method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0422368 A1 - Document ID: US20230422368A1 - Status: Published application - Kind: A1 - Application number: 18/315,656 - Filed: 2023-05-11 - Published: 2023-12-28 - Earliest claimed: 2022-06-22 - Assignees: Carux Technology Pte. Ltd. - Applicants: Carux Technology Pte. Ltd. - Inventors: Yi-Cheng CHANG; Wen-Tai CHIANG - Web page: https://patentgrep.com/patent/US20230422368A1 ## CPC - H05B 45/18: using temperature feedback - H05B 47/105: in response to determined parameters - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL ## Abstract An electronic device includes a plurality of light-emitting elements, a temperature sensor, and a control element. The control element includes a storage unit, a comparison unit, and a first control unit. The storage unit stores a look-up table including different correspondences between different temperature ranges and different power thresholds. The comparison unit receives the first power consumption of the light-emitting elements, determines the predetermined power threshold in the different correspondences of the look-up table according to the ambient temperature, and compares the first power consumption with the predetermined power threshold to determine the second power consumption. The first power consumption is obtained by measuring the light-emitting elements. The first control unit drives the light-emitting elements according to the second power consumption. ## Claims ### Claim 1 An electronic device, comprising: a plurality of light-emitting elements; a temperature sensor, configured to detect an ambient temperature; and a control element, comprising: a storage unit, configured to store a look-up table comprising different correspondences between different temperature ranges and different power thresholds; a comparison unit, configured to receive a first power consumption of the light-emitting elements, determine a predetermined power threshold in the different correspondences of the look-up table according to the ambient temperature, and compare the first power consumption with the predetermined power threshold to determine a second power consumption; wherein the first power consumption is obtained by measuring the light-emitting elements; and a first control unit, configured to drive the light-emitting elements according to the second power consumption. ### Claim 2 (depends on 1) The electronic device as claimed in claim 1, wherein the determined second power consumption is lower than the first power consumption when the first power consumption is higher than the predetermined power threshold. ### Claim 3 (depends on 1) The electronic device as claimed in claim 1, wherein the determined second power consumption is equal to the first power consumption when the first power consumption is lower than the predetermined power threshold. ### Claim 4 (depends on 1) The electronic device as claimed in claim 1, wherein the look-up table comprises a first correspondence and a second correspondence, the first correspondence is the relationship between a first temperature range and a first predetermined power threshold, the second correspondence is the relationship between a second temperature range and a second predetermined power threshold, and the predetermined power threshold includes the first predetermined power threshold and the second predetermined power threshold, wherein the second temperature range is higher than the first temperature range, and the second predetermined power threshold is lower than first predetermined power threshold. ### Claim 5 (depends on 1) The electronic device as claimed in claim 1, wherein the first control unit is configured to enable a first part of the light-emitting elements to be turned on and a second part of the light-emitting elements to be turned off, so as to drive the light-emitting elements according to the second power consumption. ### Claim 6 (depends on 1) The electronic device as claimed in claim 1, wherein the first control unit is configured to enable luminance of at least a part of the light-emitting elements to be reduced, so as to drive the light-emitting elements according to the second power consumption. ### Claim 7 (depends on 1) The electronic device as claimed in claim 1, further comprising: a voltage and current sensor, configured to detect a total voltage and a total current of the light-emitting elements, and calculate the first power consumption according to the total voltage and the total current. ### Claim 8 (depends on 1) The electronic device as claimed in claim 1, further comprising: a light source module, comprising the light-emitting elements; and a display panel, wherein the light source module provides light to the display panel. ### Claim 9 (depends on 8) The electronic device as claimed in claim 8, wherein the control element further comprises: a second control unit, configured to provide display data to the display panel according to the second power consumption. ### Claim 10 (depends on 9) The electronic device as claimed in claim 9, wherein the first control unit performs a local dimming algorithm on the display data, and performs a power consumption analysis and a local dimming control on the light-emitting elements. ### Claim 11 (depends on 4) The electronic device as claimed in claim 4, wherein the look-up table comprises a third correspondence, the third correspondence is the relationship between a third temperature range and a third predetermined power threshold. ### Claim 12 (depends on 11) The electronic device as claimed in claim 11, wherein the third temperature range is higher than the first temperature range and lower than the second temperature range; the third predetermined power threshold is lower than first predetermined power threshold and larger than the second predetermined power threshold. ### Claim 13 A control method for an electronic device, comprising: detecting an ambient temperature; obtaining a look-up table including different correspondences between different temperature ranges and different power thresholds; obtaining the first power consumption of the light-emitting elements; determining the predetermined power threshold in the different correspondences of the look-up table according to the ambient temperature; comparing the first power consumption with the predetermined power threshold to determine the second power consumption; and driving the light-emitting elements according to the second power consumption. ### Claim 14 (depends on 13) The control method as claimed in claim 13, further comprising: determining the second power consumption so that the second power consumption is lower than the first power consumption when the first power consumption is higher than the predetermined power threshold. ### Claim 15 (depends on 13) The control method as claimed in claim 13, wherein the look-up table comprises a first correspondence and a second correspondence, the first correspondence is the relationship between the first temperature range and the first predetermined power threshold, the second correspondence is the relationship between the second temperature range and the second predetermined power threshold, and the predetermined power threshold includes the first predetermined power threshold and the second predetermined power threshold, wherein the second temperature range is higher than the first temperature range, and the second predetermined power threshold is lower than first predetermined power threshold. ### Claim 16 (depends on 15) The control method as claimed in claim 15, further comprising: determining the second power consumption so that the second power consumption is lower than the first power consumption when the ambient temperature is within the second temperature range and the first power consumption of the light-emitting elements is larger than the second predetermined power threshold. ### Claim 17 (depends on 16) The control method as claimed in claim 16, further comprising: outputting initial display data to the electronic device; and calculating the first power consumption of the light-emitting elements according to the initial display data. ### Claim 18 (depends on 16) The control method as claimed in claim 16, further comprising: outputting a notification signal according to the second power consumption; modifying the initial display data to modified display data according to the notification signal; and enabling the electronic device to display according to the modified display data. ### Claim 19 (depends on 15) The control method as claimed in claim 15, wherein the look-up table comprises a third correspondence, the third correspondence is the relationship between the third temperature range and the third predetermined power threshold. ### Claim 20 (depends on 19) The control method as claimed in claim 19, wherein the third temperature range is higher than the first temperature range and lower than the second temperature range; the third predetermined power threshold is lower than the first predetermined power threshold and higher than the second predetermined power threshold.