# US 10,373,580 B2 · Display device having power reset mode > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,373,580 B2 - Document ID: US10373580B2 - Status: Granted - Kind: B2 - Application number: 15/490,151 - Filed: 2017-04-18 - Published: 2017-11-30 - Granted: 2019-08-06 - Earliest claimed: 2016-05-27 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Yong-sik Hwang; Sanghyun Park; Kyungmo Lee - Web page: https://patentgrep.com/patent/US10373580B2 ## CPC - G09G 5/003: {Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto (specific for a CRT G09G1/165; for a flat panel G09G3/2092)} - G09G 3/20: for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} - G09G 3/3648: {using an active matrix (G09G3/367 - G09G3/3696 take precedence)} - G09G 3/3696: {Generation of voltages supplied to electrode drivers} - G09G 2230/00: Details of flat display driving waveforms - G09G 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2330/02: Details of power systems and of start or stop of display operation - G09G 2330/021: Power management, e.g. power saving - G09G 2330/027: Arrangements or methods related to powering off a display - G09G 2330/028: Generation of voltages supplied to electrode drivers in a matrix display other than LCD - G09G 2330/04: Display protection - 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 device includes a power generator to supply a driving voltage to the display and a controller to control the display and the power generator and to generate a power control signal. The power generator includes a DC-DC converter and bypass cut-off logic. The DC-DC converter receives an input power voltage and the power control signal, selectively boosts the input power voltage based on the power control signal, and generates the driving voltage. The bypass cut-off logic selectively cuts off supply of the input power voltage to the DC-DC converter based on the power control signal. ## Claims ### Claim 1 A display device, comprising: a display to display an image; a power generator to supply a driving voltage to the display and the power generator including an OP-AMP to receive the driving voltage as power; and a controller to control the display and the power generator and to generate a power control signal, wherein the power generator includes: a DC-DC converter to receive an input power voltage and the power control signal, selectively boost the input power voltage based on the power control signal, and generate the driving voltage; and a bypass cut-off logic to selectively cut-off supply of the input power voltage to the DC-DC converter based on the power control signal and to selectively cut-off supply of the driving voltage to the OP-AMP to reset the OP-AMP. ### Claim 2 (depends on 1) The display device as claimed in claim 1, wherein: the DC-DC converter is to perform boosting in an active section and hold boosting in an inactive section, and the bypass cut-off logic is to cut off supply of the input power voltage in the inactive section and supply the input power voltage in the active section. ### Claim 3 (depends on 2) The display device as claimed in claim 2, wherein: the driving voltage has an off level in the inactive section, and the off level is less than a level of a predetermined shut down voltage. ### Claim 4 (depends on 3) The display device as claimed in claim 3, wherein the off level is a ground level. ### Claim 5 (depends on 2) The display device as claimed in claim 2, wherein: the power generator includes a common voltage generator to receive the driving voltage and convert the driving voltage into a common voltage, and the common voltage generator is to be turned off in the inactive section. ### Claim 6 (depends on 5) The display device as claimed in claim 5, wherein: the common voltage generator includes the OP-AMP to receive the driving voltage as power, and the bypass cut-off logic is to cut-off supply of the driving voltage to the OP-AMP when the OP-AMP operates abnormally. ### Claim 7 (depends on 5) The display device as claimed in claim 5, wherein: the power control signal has a first logic level in the inactive section; the DC-DC converter is to hold boosting based on the first logic level; the bypass cut-off logic is to cut off supply of the input power voltage based on the first logic level; and the common voltage generator is to be turned off based on the first logic level. ### Claim 8 (depends on 7) The display device as claimed in claim 7, wherein the DC-DC converter is to output a voltage having an off level lower than a level of a predetermined shut down voltage as the driving voltage based on the first logic level. ### Claim 9 (depends on 7) The display device as claimed in claim 7, wherein: the power control signal has a second logic level in the active section; the DC-DC converter is to boost based on the second logic level; the bypass cut-off logic is to supply the input power voltage based on the second logic level; and the common voltage generator is to be turned on based on the second logic level. ### Claim 10 (depends on 2) The display device as claimed in claim 2, wherein the bypass cut-off logic includes: a bypass controller to receive the power control signal and the input power voltage and generate a cut-off control signal based on the power control signal; and a bypass cut-off transistor including an input terminal to receive the input power voltage and a control terminal to receive the cut-off control signal, the bypass cut-off transistor to cut off supply of the input power voltage provided to the DC-DC converter based on the cut-off control signal. ### Claim 11 (depends on 10) The display device as claimed in claim 10, wherein the DC-DC converter includes an inductor having a first terminal coupled to an output terminal of the bypass cut-off transistor. ### Claim 12 (depends on 11) The display device as claimed in claim 11, wherein: the DC-DC converter includes a diode coupled to a second terminal of the inductor, a switching transistor coupled to the second terminal of the inductor, and a boosting controller, and the boosting controller is to receive the power control signal in the active section and generate a pulse based on the power control signal to output the pulse to a control terminal of the switching transistor. ### Claim 13 (depends on 12) The display device as claimed in claim 12, wherein the boosting controller is to receive the power control signal in the inactive section and to turn off the switching transistor based on the power control signal. ### Claim 14 (depends on 10) The display device as claimed in claim 10, wherein the bypass controller is to generate the input power voltage as the cut-off control signal in the inactive section and apply a voltage having a gate-on level to turn on the bypass cut-off transistor as the cut-off control signal to the control terminal of the bypass cut-off transistor in the active section.