# US 12,190,760 B2 · Display system and power-saving method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,190,760 B2 - Document ID: US12190760B2 - Status: Granted - Kind: B2 - Application number: 18/433,411 - Filed: 2024-02-06 - Published: 2024-08-15 - Granted: 2025-01-07 - Earliest claimed: 2023-02-14 - Assignees: Coretronic Projection (Kunshan) Corporation - Applicants: Coretronic Projection (Kunshan) Corporation - Inventors: Yifei Sun; Ying Zhang; Qing Lu; Yebing Zhang - Web page: https://patentgrep.com/patent/US12190760B2 ## CPC - G09G 3/002: {to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT} - G09G 5/006: {Details of the interface to the display terminal (specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04)} - G09G 2330/022: in absence of operation, e.g. no data being entered during a predetermined time - G09G 2370/02: Networking aspects - G09G 2370/22: Detection of presence or absence of input display information or of connection or disconnection of a corresponding information source - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) ## Abstract A display system and a power-saving method thereof are provided. In a first standby mode, a control circuit of a display device detects whether a preset pin of a signal input port generates a voltage variation or maintains at a preset voltage value during a preset period. When the control circuit detects the voltage variation or the preset voltage value, the control circuit switches the display device to a second standby mode and generates an output signal according to an input signal received by the signal input port, and allows the output signal to be transmitted to the signal output port, or establishes a network connection according to the input signal. When the control circuit does not detect the voltage variation nor the preset voltage, the first standby mode is maintained by the control circuit. ## Claims ### Claim 1 A display system, comprising: a first display device, comprising an illumination module, a signal input port, a signal output port, and a control circuit, wherein the first display device is adapted to switch between a normal operation mode, a first standby mode, and a second standby mode; wherein the illumination module provides an illumination beam in the normal operation mode, and does not provide the illumination beam in the first standby mode and the second standby mode, the signal input port has a preset pin, in the first standby mode, the signal input port and the signal output port are disabled, and in the second standby mode, the signal input port and the signal output port are enabled, the control circuit is coupled to the illumination module, the signal input port, and the signal output port, wherein in the first standby mode, the control circuit detects whether the preset pin of the signal input port generates a voltage variation or maintains at a preset voltage value during a preset period, when the control circuit detects the voltage variation or the preset voltage value, the control circuit switches the first display device from the first standby mode to the second standby mode, and generates an output signal according to an input signal received by the signal input port and allows the output signal to be transmitted to the signal output port, or establishes a network connection of the first display device according to the input signal received by the signal input port, when the control circuit does not detect the voltage variation nor the preset voltage value, the first standby mode is maintained by the control circuit, wherein both the voltage variation and the preset voltage value are greater than 0. ### Claim 2 (depends on 1) The display system according to claim 1, wherein when the first display device is switched from the first standby mode to the second standby mode, the control circuit takes the input signal as the output signal and transmits the output signal to the signal output port, or performs a signal conversion process on the input signal to generate the output signal and transmits the output signal to the signal output port. ### Claim 3 (depends on 1) The display system according to claim 1, wherein the control circuit further provides a status signal to a signal source device providing the input signal through the signal input port, and the status signal indicates an operation mode of the first display device. ### Claim 4 (depends on 1) The display system according to claim 1, wherein the input signal comprises at least one of at least one of a network signal, an image signal, or an audio signal. ### Claim 5 (depends on 4) The display system according to claim 4, wherein the first display device further comprises a network card chip, the network card chip is coupled between the signal input port and the control circuit, when the first display device is switched from the first standby mode to the second standby mode, the control circuit turns on the network card chip to establish the network connection. ### Claim 6 (depends on 4) The display system according to claim 4, wherein when the input signal is the network signal, the input signal comprises a remote control signal, and the control circuit switches the first display device to the normal operation mode, the first standby mode, or the second standby mode according to the remote control signal. ### Claim 7 (depends on 1) The display system according to claim 1, further comprising: a second display device, the second display device having the illumination module, the signal input port, the signal output port, and the control circuit as described in claim 1, wherein the signal input port of the second display device is coupled to the signal output port of the first display device. ### Claim 8 (depends on 7) The display system according to claim 7, wherein when the first display device is in the second standby mode and the second display device is in a first standby mode, the control circuit of the second display device detects whether a preset pin of the signal input port generates a voltage variation or maintains at a preset voltage value during a preset period, when the control circuit of the second display device detects the voltage variation or the preset voltage value, the control circuit of the second display device switches the second display device to a second standby mode. ### Claim 9 (depends on 1) The display system according to claim 1, wherein the signal input port and the signal output port are RJ45 ports, VGA ports, HDMI ports, audio ports, TRS ports, or S/PDIF ports. ### Claim 10 (depends on 1) The display system according to claim 1, wherein the first display device is in the second standby mode, when the control circuit does not detect the voltage variation nor the preset voltage value of the preset pin of the signal input port during another preset period, the control circuit switches the first display device to the first standby model. ### Claim 11 A power-saving method of a display system, the display system comprising a first display device, the first display device comprising an illumination module, a signal input port, a signal output port, and a control circuit, wherein the first display device is adapted to switch between a normal operation mode, a first standby mode, and a second standby mode, the illumination module provides an illumination beam in the normal operation mode, and does not provide the illumination beam in the first standby mode and the second standby mode, wherein the power-saving method of the display system comprises: determining whether the first display device is in the first standby mode by the control circuit of the first display device; detecting whether a preset pin of the signal input port generates a voltage variation or maintains at a preset voltage value by the control circuit during a preset period when the first display device is in the first standby mode; switching the first display device to the second standby mode by the control circuit when the voltage variation or the preset voltage value is detected; generating an output signal by the control circuit according to an input signal received by the signal input port, and allowing the output signal to be transmitted to the signal output port, or establishing a network connection of the first display device by the control circuit according to the input signal received by the signal input port; and maintaining the first display device in the first standby mode when neither the voltage variation nor the preset voltage value is detected, wherein both the voltage variation and the preset voltage value are greater than 0. ### Claim 12 (depends on 11) The power-saving method of the display system according to claim 11, wherein when the first display device is switched from the first standby mode to the second standby mode, taking the input signal as the output signal and transmitting the output signal to the signal output port, or performing a signal conversion process on the input signal to generate the output signal and transmitting the output signal to the signal output port by the control circuit. ### Claim 13 (depends on 11) The power-saving method of the display system according to claim 11, wherein the input signal comprises at least one of a network signal, an image signal, or an audio signal. ### Claim 14 (depends on 13) The power-saving method of the display system according to claim 13, wherein the first display device further comprises a network card chip, the network card chip is coupled between the signal input port and the control circuit, when the first display device is switched from the first standby mode to the second standby mode, the control circuit turns on the network card chip to establish the network connection. ### Claim 15 (depends on 13) The power-saving method of the display system according to claim 13, wherein when the input signal is the network signal, the input signal comprises a remote control signal, and the control circuit switches the first display device to the normal operation mode, the first standby mode, or the second standby mode according to the remote control signal. ### Claim 16 (depends on 11) The power-saving method of the display system according to claim 11, wherein the display system further comprises a second display device, the second display device comprises the illumination module, the signal input port, the signal output port, and the control circuit as described in claim 11, the power-saving method of the display system comprises: transmitting the output signal from the first display device to the signal input port of the second display device when the first display device is in the second standby mode and the second display device is in the first standby mode. ### Claim 17 (depends on 16) The power-saving method of the display system according to claim 16, further comprising: switching the second display device to a second standby mode by the control circuit of the second display device by detecting the voltage variation or the preset voltage value of the signal input port. ### Claim 18 (depends on 11) The power-saving method of the display system according to claim 11, wherein the signal input port and the signal output port are RJ45 ports, VGA ports, HDMI ports, audio ports, TRS ports, or S/PDIF ports. ### Claim 19 (depends on 11) The power-saving method of the display system according to claim 11, further comprising: switching the first display device to the first standby mode by the control circuit not detecting the voltage variation nor the preset voltage value during another preset period when the first display device is in the second standby mode.