# US 2008/0186302 A1 · Display with charge function and display controller thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2008/0186302 A1 - Document ID: US20080186302A1 - Status: Published application - Kind: A1 - Application number: 11/622,472 - Filed: 2007-01-12 - Published: 2008-08-07 - Earliest claimed: 2006-12-06 - Assignees: Novatek Microelectronics Corp. - Inventors: Rei-Hong Chang - Web page: https://patentgrep.com/patent/US20080186302A1 ## CPC - H02J 7/80: including monitoring or indicating arrangements - H02J 7/00: Circuit arrangements for charging or discharging batteries or for supplying loads from batteries - H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY ## Abstract A display with charge function and a display controller thereof are provided. The display provided by the present invention includes a display controller and a charge base, wherein the display controller is built-in in the display, and includes a voltage output unit and a voltage detecting/regulating unit. The voltage output unit is used to provide an output voltage according to a pulse width modulation (PWM) signal. The voltage detecting/regulating unit is used to detect the output voltage output by the voltage output unit, and generate a regulating signal accordingly to regulate the pulse width of the PWM signal. The charge base is disposed on the display for charging a storage device on the charge base according to the output voltage output by the voltage output unit, wherein the voltage value of the output voltage output by the voltage output unit is followed by the pulse width of the PWM signal. ## Claims ### Claim 1 A display controller, built-in in a display, comprising: a voltage output unit, for providing an output voltage according to a pulse width modulation (PWM) signal; and a voltage detecting/regulating unit, coupled to the voltage output unit, for detecting the output voltage and generating a regulating signal accordingly to regulate a pulse width of the PWM signal, wherein the voltage value of the output voltage is followed by the pulse width of the PWM signal. ### Claim 2 (depends on 1) The display controller as claimed in claim 1, wherein the voltage output unit comprises: a switching switch, to be turned on or not according to the PWM signal; a rectifying element, having a cathode coupled to the switching control unit, and an anode coupled to a common potential, wherein the rectifying element is used for limiting the flowing direction of the current; and a low pass filter, connected to the rectifying element in parallel, for providing the output voltage. ### Claim 3 (depends on 2) The display controller as claimed in claim 2, wherein the switching switch comprises a power MOS, having a first drain/source for receiving a system voltage, a gate for receiving the PWM signal, and a second drain/source coupled to the cathode of the rectifying element. ### Claim 4 (depends on 3) The display controller as claimed in claim 3, wherein the low pass filter comprises: an inductor, having a first end coupled to the cathode of the rectifying element, and a second end for providing the output voltage; and a capacitor, having a positive end coupled to the second end of the inductor, and a negative end coupled to the common potential. ### Claim 5 (depends on 2) The display controller as claimed in claim 2, wherein the rectifying element comprises a Schottky rectifying diode. ### Claim 6 (depends on 1) The display controller as claimed in claim 1, wherein the display comprises a thin film transistor liquid crystal display (TFT-LCD). ### Claim 7 (depends on 1) The display controller as claimed in claim 1, wherein the pulse width of the PWM signal is determined by an on screen display (OSD) menu of the display. ### Claim 8 A display with charge function, comprising: a display controller, built-in in the display, comprising: a voltage output unit, for providing an output voltage according to a PWM signal; and a voltage detecting/regulating unit, coupled to the voltage output unit, for detecting the output voltage and generating a regulating signal accordingly to regulate a pulse width of the PWM signal; and a charge base, disposed on the display, and coupled between the display controller and a common potential, for charging a storage device on the charge base according to the output voltage, wherein the voltage value of the output voltage is followed by the pulse width of the PWM signal. ### Claim 9 (depends on 8) The display with charge function as claimed in claim 8, wherein the voltage output unit comprises: a switching switch, to be turned on or not according to the PWM signal; a rectifying element, having a cathode coupled to the switching control unit, and an anode coupled to a common potential, wherein the rectifying element is used for limiting the flowing direction of the current; and a low pass filter, connected to the rectifying element in parallel, for providing the output voltage. ### Claim 10 (depends on 9) The display with charge function as claimed in claim 9, wherein the switching switch comprises a power MOS, having a first drain/source for receiving a system voltage, a gate for receiving the PWM signal, and a second drain/source coupled to the cathode of the rectifying element. ### Claim 11 (depends on 10) The display with charge function as claimed in claim 10, wherein the low pass filter comprises: an inductor, having a first end coupled to the cathode of the rectifying element, and a second end for providing the output voltage; and a capacitor, having a positive end coupled to the second end of the inductor, and a negative end coupled to the common potential. ### Claim 12 (depends on 9) The display with charge function as claimed in claim 9, wherein the rectifying element comprises a Schottky rectifying diode. ### Claim 13 (depends on 8) The display with charge function as claimed in claim 8, wherein the specification of the charge base comprises an AA/AAA charger, a DC power jack, or a USB type A connector. ### Claim 14 (depends on 8) The display with charge function as claimed in claim 8, wherein the storage device comprises a rechargeable battery. ### Claim 15 (depends on 8) The display with charge function as claimed in claim 8, wherein the display comprises a TFT-LCD. ### Claim 16 (depends on 8) The display with charge function as claimed in claim 8, wherein the pulse width of the PWM signal is determined by an OSD menu of the display.