# US 10,312,792 B2 · Projection apparatus, power management apparatus, and method for power management thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,312,792 B2 - Document ID: US10312792B2 - Status: Granted - Kind: B2 - Application number: 15/391,848 - Filed: 2016-12-28 - Published: 2017-07-06 - Granted: 2019-06-04 - Earliest claimed: 2015-12-31 - Assignees: Coretronic Corporation - Applicants: Coretronic Corporation - Inventors: Kuo-Huan Wei; Chih-Chung Yang; Yung-Chuan Tseng; Wen-Chen Chen; Jui-Ming Tsai - Web page: https://patentgrep.com/patent/US10312792B2 ## CPC - H02M 1/10: Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from AC or DC - H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P) ## Abstract A projection apparatus, a power management apparatus, and a method for power management thereof are provided. The projection apparatus has a first power socket corresponding to a first power specification and a second power socket corresponding to a second power specification. The second power specification is different from the first power specification. A voltage detection unit is adapted to detect an input voltage received by a powered power socket, wherein the powered power socket is the first power socket or the second power socket. A control unit decides whether the input voltage detected by the voltage detection unit is matched up with the power specification of the corresponding powered power socket to determine an operation mode of the projection apparatus and to determine whether the projection apparatus provides an alarm message to ensure safety of use. ## Claims ### Claim 1 A projection apparatus, comprising: a first power socket, corresponding to a first power specification; a second power socket, corresponding to a second power specification, wherein the second power specification is different from the first power specification; and a power management apparatus, coupled to the first power socket and the second power socket, the power management apparatus comprising: a voltage detection unit, adapted to detect an input voltage received by a powered power socket, wherein the powered power socket is the first power socket or the second power socket; and a control unit, coupled to the voltage detection unit, and deciding an operation mode of the projection apparatus and deciding whether an alarm message is provided by the projection apparatus according to whether the input voltage detected by the voltage detection unit is matched up with a power specification corresponding to the powered power socket. ### Claim 2 (depends on 1) The projection apparatus as claimed in claim 1, wherein the control unit controls the projection apparatus to enter a first warning mode if a voltage received by the first power socket is corresponding to the second power specification, and the control unit controls the projection apparatus to enter a second warning mode if a voltage received by the second power socket is corresponding to the first power specification. ### Claim 3 (depends on 2) The projection apparatus as claimed in claim 2, wherein the power management apparatus further comprises: an alarm unit, coupled to the control unit, wherein the control unit controls the alarm unit to send the alarm message if the projection apparatus enters the first warning mode or the second warning mode, wherein the alarm message is configured to notice that the input voltage received by the powered power socket is not matched up with the power specification corresponding to the powered power socket. ### Claim 4 (depends on 2) The projection apparatus as claimed in claim 2, wherein the voltage corresponding to the first power specification is smaller than the voltage corresponding to the second power specification, the projection apparatus operates at a high power or a low power method during the first warning mode, and the projection apparatus operates at the low power or the high power method during the second warning mode. ### Claim 5 (depends on 2) The projection apparatus as claimed in claim 2, wherein the projection apparatus is configured to perform projection during the first warning mode and is configured to perform projection during the second warning mode. ### Claim 6 (depends on 1) The projection apparatus as claimed in claim 1, wherein when the voltage received by the first power socket is corresponding to the first power specification, the control unit controls the projection apparatus to enter a first power mode, and when the voltage received by the second power socket is corresponding to the second power specification, the control unit controls the projection apparatus to enter a second power mode. ### Claim 7 (depends on 1) The projection apparatus as claimed in claim 1, further comprising: a casing, wherein the first power socket and the second power socket are disposed on the casing; and a cover, movably disposed on the casing, configured to selectively cover the first power socket or the second power socket. ### Claim 8 (depends on 7) The projection apparatus as claimed in claim 7, further comprising: a cover position detection unit, coupled to the control unit, and detecting a position of the cover and correspondingly sending a position detection signal, wherein the control unit determines the cover covers the first power socket or the second power socket according to the position detection signal. ### Claim 9 (depends on 8) The projection apparatus as claimed in claim 8, wherein the control unit further determines whether the input voltage received by the powered power socket is matched up with the power specification corresponding to the powered power socket according to the position detection signal and the input voltage. ### Claim 10 (depends on 7) The projection apparatus as claimed in claim 7, wherein the power management apparatus further comprises: a first fuse repair hole, disposed on the casing, and configured to expose a first fuse corresponding to the first power socket, wherein the first fuse is coupled between the first power socket and the power management apparatus, wherein the cover is further configured to selectively cover the first power socket and the first fuse repair hole at the same time; and a second fuse repair hole, disposed on the casing, and configured to expose a second fuse corresponding to the second power socket, wherein the second fuse is coupled between the second power socket and the power management apparatus, wherein the cover is further configured to selectively cover the second power socket and the second fuse repair hole at the same time. ### Claim 11 (depends on 1) The projection apparatus as claimed in claim 1, wherein the power management apparatus further comprises: a power switch, coupled to the first power socket and the second power socket, configured to turn on or turn off a power supply path between the first power socket and the power management apparatus, and configured to turn on or turn off a power supply path between the second power socket and the power management apparatus. ### Claim 12 A power management apparatus, adapted for managing a projection apparatus, the projection apparatus has a first power socket corresponding to a first power specification and a second power socket corresponding to a second power specification, the second power specification is different from the first power specification, the power management apparatus comprising: a voltage detection unit, adapted to detect an input voltage received by a powered power socket, wherein the powered power socket is the first power socket or the second power socket; and a control unit, coupled to the voltage detection unit, and deciding an operation mode of the projection apparatus and deciding whether an alarm message is provided by the projection apparatus according to whether the input voltage detected by the voltage detection unit is matched up with a power specification corresponding to the powered power socket. ### Claim 13 (depends on 12) The power management apparatus as claimed in claim 12, wherein the control unit controls the projection apparatus to enter a first warning mode if a voltage received by the first power socket is corresponding to the second power specification, and the control unit controls the projection apparatus to enter a second warning mode if a voltage received by the second power socket is corresponding to the first power specification. ### Claim 14 (depends on 13) The power management apparatus as claimed in claim 13, further comprising: an alarm unit, coupled to the control unit, wherein the control unit controls the alarm unit to send the alarm message if the projection apparatus enters the first warning mode or the second warning mode, wherein the alarm message is configured to notice that the input voltage received by the powered power socket is not matched up with the power specification corresponding to the powered power socket. ### Claim 15 (depends on 13) The power management apparatus as claimed in claim 13, wherein the voltage corresponding to the first power specification is smaller than the voltage corresponding to the second power specification, the projection apparatus operates at a high power or a low power method during the first warning mode, and the projection apparatus operates at the low power or the high power method during the second warning mode. ### Claim 16 (depends on 12) The power management apparatus as claimed in claim 12, wherein when the voltage received by the first power socket is corresponding to the first power specification, the control unit controls the projection apparatus to enter a first power mode, and when the voltage received by the second power socket is corresponding to the second power specification, the control unit controls the projection apparatus to enter a second power mode. ### Claim 17 (depends on 12) The power management apparatus as claimed in claim 12, wherein the first power socket and the second power socket are disposed on a casing of the projection apparatus, the power management apparatus further comprises: a cover position detection unit, coupled to the control unit, detecting a position of a cover disposed on the casing, and correspondingly sending a position detection signal, wherein the control unit determines the cover covers the first power socket or the second power socket according to the position detection signal, wherein the cover is movably disposed on the casing to selectively cover the first power socket or the second power socket. ### Claim 18 (depends on 17) The power management apparatus as claimed in claim 17, wherein the control unit further determines whether the input voltage received by the powered power socket is matched up with the power specification corresponding to the powered power socket according to the position detection signal and the input voltage. ### Claim 19 (depends on 17) The power management apparatus as claimed in claim 17, further comprising: a first fuse repair hole, disposed on the casing, and configured to expose a first fuse corresponding to the first power socket, wherein the first fuse is coupled between the first power socket and the power management apparatus, wherein the cover is further configured to selectively cover the first power socket and the first fuse repair hole at the same time; and a second fuse repair hole, disposed on the casing, and configured to expose a second fuse corresponding to the second power socket, wherein the second fuse is coupled between the second power socket and the power management apparatus, wherein the cover is further configured to selectively cover the second power socket and the second fuse repair hole at the same time. ### Claim 20 (depends on 12) The power management apparatus as claimed in claim 12, further comprising: a power switch, coupled to the first power socket and the second power socket, configured to turn on or turn off a power supply path between the first power socket and the power management apparatus, and configured to turn on or turn off a power supply path between the second power socket and the power management apparatus. ### Claim 21 A method for power management, adapted for a projection apparatus having a first power socket corresponding to a first power specification and a second power socket corresponding to a second power specification, the second power specification is different from the first power specification, the method for power management comprising: providing a voltage detection unit, detecting an input voltage received by a powered power socket through the voltage detection unit, wherein the powered power socket is the first power socket or the second power socket; and providing a control unit, deciding an operation mode of the projection apparatus and deciding whether an alarm message is provided by the projection apparatus according to whether the input voltage detected by the voltage detection unit is matched up with a power specification corresponding to the powered power socket through the control unit. ### Claim 22 (depends on 21) The method for power management as claimed in claim 21, wherein the step of deciding the operation mode of the projection apparatus and deciding whether the alarm message is provided by the projection apparatus according to whether the input voltage detected by the voltage detection unit is matched up with the power specification corresponding to the powered power socket through the control unit comprises: if the control unit determines a voltage received by the first power socket is corresponding to the second power specification, the control unit controls the projection apparatus to enter a first warning mode; and if the control unit determines a voltage received by the second power socket is corresponding to the first power specification, the control unit controls the projection apparatus to enter a second warning mode. ### Claim 23 (depends on 22) The method for power management as claimed in claim 22, wherein the step of deciding the operation mode of the projection apparatus and deciding whether the alarm message is provided by the projection apparatus according to whether the input voltage detected by the voltage detection unit is matched up with the power specification corresponding to the powered power socket through the control unit comprises: providing an alarm unit, when the projection apparatus enters the first warning mode or the second warning mode, the alarm unit sends the alarm message to notice that the input voltage received by the powered power socket is not matched up with the power specification corresponding to the powered power socket. ### Claim 24 (depends on 22) The method for power management as claimed in claim 22, wherein the voltage corresponding to the first power specification is smaller than the voltage corresponding to the second power specification, the projection apparatus operates at a high power or a low power method during the first warning mode, and the projection apparatus operates at the low power or the high power method during the second warning mode. ### Claim 25 (depends on 21) The method for power management as claimed in claim 21, wherein the step of deciding the operation mode of the projection apparatus and deciding whether the alarm message is provided by the projection apparatus according to whether the input voltage detected by the voltage detection unit is matched up with the power specification corresponding to the powered power socket through the control unit comprises: determining whether a voltage received by the first power socket is corresponding to the first power specification through the control unit, if the voltage received by the first power socket is corresponding to the first power specification, the control unit controls the projection apparatus to enter a first power mode; and determining whether a voltage received by the second power socket is corresponding to the second power specification through the control unit, if the voltage received by the second power socket is corresponding to the second power specification, the control unit controls the projection apparatus to enter a second power mode. ### Claim 26 (depends on 21) The method for power management as claimed in claim 21, wherein the first power socket and the second power socket are disposed on a casing of the projection apparatus, the method for power management further comprising: providing a cover position detection unit, detecting a position of a cover disposed on the casing and correspondingly sending a position detection signal through the cover position detection unit; and determining the cover covers the first power socket or the second power socket according to the position detection signal through the control unit, wherein the cover is movably disposed on the casing to selectively cover the first power socket or the second power socket. ### Claim 27 (depends on 26) The method for power management as claimed in claim 26, further comprising: determining whether the input voltage received by the powered power socket is matched up with the power specification corresponding to the powered power socket according to the position detection signal and the input voltage through the control unit.