# US 2014/0192094 A1 · Driving circuit of display panel and driving module thereof, and display device and method for manufacturing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0192094 A1 - Document ID: US20140192094A1 - Status: Published application - Kind: A1 - Application number: 14/133,978 - Filed: 2013-12-19 - Published: 2014-07-10 - Earliest claimed: 2013-01-04 - Assignees: Sitronix Technology Corp. - Applicants: Sitronix Technology Corp. - Inventors: MIN-NAN LIAO; CHIH-PING SU - Web page: https://patentgrep.com/patent/US20140192094A1 ## CPC - G09G 3/3696: {Generation of voltages supplied to electrode drivers} - G09G 2310/027: Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters - G09G 2310/0289: Details of voltage level shifters arranged for use in a driving circuit - Y10T 29/4913: Assembling to base an electrical component, e.g., capacitor, etc. - 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) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The present invention relates to a driving circuit of a display panel. A plurality of driving units produce a reference driving voltage according to a gamma voltage of a gamma circuit, respectively. A plurality of digital-to-analog converting circuits receive the reference driving voltages output by the plurality of driving units, and select one of the plurality of reference driving voltage as a data driving voltage according to pixel data, respectively. The plurality of digital-to-analog converting circuits transmit the plurality of data driving voltages to the display panel for displaying images. A voltage boost circuit is used for producing a first supply voltage and providing the first supply voltage to the plurality of digital-to-analog converting circuits. At least a voltage boost unit is used for producing a second supply voltage and providing the second supply voltage to the plurality of driving units. ## Claims ### Claim 1 A driving circuit of a display panel, comprising: a plurality of driving units, producing a reference driving voltage according a gamma voltage of a gamma circuit, respectively; a plurality of digital-to-analog converting circuits, receiving said reference driving voltage output by said plurality of driving units, selecting one of said plurality of reference voltages as a data driving voltage according to pixel data, respectively, and transmitting said plurality of data driving voltages to said display panel; a voltage boost circuit, used for producing a first supply voltage, and providing said first supply voltage to said plurality of digital-to-analog converting circuits; and at least a voltage boost unit, used for producing a second supply voltage, and providing said second supply voltage to said plurality of driving units. ### Claim 2 (depends on 1) The driving circuit of claim 1, wherein said plurality of driving units comprise: a differential unit, receiving said first supply voltage as the power supply, and producing a differential voltage according to said gamma voltage; and an output unit, receiving said second supply voltage as the power supply, and producing said reference driving voltage according to said differential voltage. ### Claim 3 (depends on 2) The driving circuit of claim 2, wherein there is a connecting path between said voltage boost unit and said output unit, and no storage capacitor is connected to said connecting path. ### Claim 4 (depends on 1) The driving circuit of claim 1, wherein said plurality of driving units comprise: a differential unit, receiving said second supply voltage as the power supply, and producing a differential voltage according to said gamma voltage; and an output unit, receiving said second supply voltage as the power supply, and producing said reference driving voltage according to said differential voltage. ### Claim 5 (depends on 4) The driving circuit of claim 4, wherein there is a connecting path between said voltage boost unit and said output unit and between said voltage boost unit and said differential unit, respectively, and no storage capacitor is connected to said connecting path. ### Claim 6 (depends on 1) The driving circuit of claim 1, wherein said voltage boost unit requires no storage capacitor. ### Claim 7 (depends on 6) The driving circuit of claim 6, wherein there is a connecting path between said voltage boost unit and said plurality of driving units, and no storage capacitor is connected to said connecting path. ### Claim 8 A driving circuit of a display panel, comprising: a plurality of driving units, producing a reference driving voltage according a gamma voltage of a gamma circuit, respectively; a plurality of digital-to-analog converting circuits, receiving said reference driving voltage output by said plurality of driving units, selecting one of said plurality of reference voltages as a data driving voltage according to pixel data, respectively, and transmitting said plurality of data driving voltages to said display panel; a voltage boost circuit, used for producing a first supply voltage, and providing said first supply voltage to said plurality of digital-to-analog converting circuits; and a plurality of voltage boost units, used for producing a second supply voltage, and providing said second supply voltage to said plurality of driving units. ### Claim 9 (depends on 8) The driving circuit of claim 8, wherein said plurality of driving units comprise: a differential unit, receiving said first supply voltage as the power supply, and producing a differential voltage according to said gamma voltage; and an output unit, receiving said second supply voltage as the power supply, and producing said reference driving voltage according to said differential voltage. ### Claim 10 (depends on 8) The driving circuit of claim 8, wherein said plurality of driving units comprise: a differential unit, receiving said second supply voltage as the power supply, and producing a differential voltage according to said gamma voltage; and an output unit, receiving said second supply voltage as the power supply, and producing said reference driving voltage according to said differential voltage. ### Claim 11 (depends on 8) The driving circuit of claim 8, wherein said plurality of voltage boost units require no storage capacitor. ### Claim 12 A driving module of a display panel, comprising: a flexible circuit board, connected electrically with said display panel; and a driving chip, disposed on one side of said flexible circuit boards, and comprising: a plurality of driving units, producing a reference driving voltage according a gamma voltage of a gamma circuit, respectively; a plurality of digital-to-analog converting circuits, receiving said reference driving voltage output by said plurality of driving units, selecting one of said plurality of reference voltages as a data driving voltage according to pixel data, respectively, and transmitting said plurality of data driving voltages to said display panel for displaying images; a voltage boost circuit, used for producing a first supply voltage, and providing said first supply voltage to said plurality of digital-to-analog converting circuits; and at least a voltage boost unit, used for producing a second supply voltage, and providing said second supply voltage to said plurality of driving units. ### Claim 13 A display device, comprising: a display panel, used for displaying an image; a flexible circuit board, connected electrically with said display panel; and a driving chip, disposed on one side of said flexible circuit boards, producing plurality of data driving voltages to said display panel for displaying said image, and comprising: a plurality of driving units, producing a reference driving voltage according a gamma voltage of a gamma circuit, respectively; a plurality of digital-to-analog converting circuits, receiving said reference driving voltage output by said plurality of driving units, selecting one of said plurality of reference voltages as a data driving voltage according to pixel data, respectively, and transmitting said plurality of data driving voltages to said display panel; a voltage boost circuit, used for producing a first supply voltage, and providing said first supply voltage to said plurality of digital-to-analog converting circuits; and at least a voltage boost unit, used for producing a second supply voltage, and providing said second supply voltage to said plurality of driving units. ### Claim 14 A driving circuit of a display panel, comprising: a plurality of digital-to-analog converting circuits, receiving a plurality of gamma voltages of a gamma circuit, and selecting one of a plurality of reference voltages as a reference driving voltage according to pixel data, respectively; a plurality of driving units, receiving said reference driving voltage output by said plurality of digital-to-analog converting circuits, producing a data driving voltage according to said reference driving voltage, and transmitting said data driving voltage to said display panel for display images; a voltage boost circuit, used for producing a first supply voltage, and providing said first supply voltage to said plurality of digital-to-analog converting circuits; and at least a voltage boost unit, used for producing a second supply voltage, and providing said second supply voltage to said plurality of driving units; where said plurality of driving units comprise: a differential unit, receiving said first supply voltage as the power supply, and producing a differential voltage according to said gamma voltage; and an output unit, receiving said second supply voltage as the power supply, and producing said data driving voltage according to said differential voltage. ### Claim 15 A method for manufacturing a display device, comprising steps of: providing a display panel, a flexible circuit board, and a driving chip; disposing said driving chip to said display panel; and disposing said flexible circuit board to said display panel and connected electrically with said driving chip; where said flexible circuit board requires no storage capacitor. ### Claim 16 (depends on 15) The method for manufacturing a display panel of claim 15, and further comprising a step of disposing a backlight module under said display panel for providing a light source to said display panel.