TWI568150B - 直流-直流轉換器及包含其之有機發光顯示器 - Google Patents

直流-直流轉換器及包含其之有機發光顯示器 Download PDF

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Publication number
TWI568150B
TWI568150B TW101133427A TW101133427A TWI568150B TW I568150 B TWI568150 B TW I568150B TW 101133427 A TW101133427 A TW 101133427A TW 101133427 A TW101133427 A TW 101133427A TW I568150 B TWI568150 B TW I568150B
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Taiwan
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voltage
switching device
output
transistor
feedback
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TW101133427A
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English (en)
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TW201338374A (zh
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朴星千
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三星顯示器有限公司
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/02Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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
    • G09G3/22Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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 using controlled light sources
    • G09G3/30Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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 using controlled light sources using electroluminescent panels
    • G09G3/32Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
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    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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
    • G09G3/22Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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 using controlled light sources
    • G09G3/30Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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 using controlled light sources using electroluminescent panels
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    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
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    • G09G3/30Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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 using controlled light sources using electroluminescent panels
    • G09G3/32Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3258Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the voltage across the light-emitting element
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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
    • G09G3/22Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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 using controlled light sources
    • G09G3/30Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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 using controlled light sources using electroluminescent panels
    • G09G3/32Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3266Details of drivers for scan electrodes
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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
    • G09G3/22Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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 using controlled light sources
    • G09G3/30Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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 using controlled light sources using electroluminescent panels
    • G09G3/32Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes 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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3275Details of drivers for data electrodes
    • G09G3/3291Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/08Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/32Means for protecting converters other than automatic disconnection
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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    • H02M3/00Conversion of dc power input into dc power output
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    • H02M3/10Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/02Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
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    • H02M3/155Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30Driver circuits
    • H05B45/37Converter circuits
    • H05B45/3725Switched mode power supply [SMPS]
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00Circuit arrangements for operating light-emitting diodes [LED]
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20Responsive to malfunctions or to light source life; for protection
    • H05B47/25Circuit arrangements for protecting against overcurrent
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
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    • GPHYSICS
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    • G09G2310/0264Details of driving circuits
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    • G09G2330/04Display protection
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/0003Details of control, feedback or regulation circuits
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
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    • H02M1/325Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00Circuit arrangements for operating light-emitting diodes [LED]
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    • H05B45/375Switched mode power supply [SMPS] using buck topology
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30Driver circuits
    • H05B45/37Converter circuits
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    • H05B45/38Switched mode power supply [SMPS] using boost topology
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Electroluminescent Light Sources (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of El Displays (AREA)

Description

直流-直流轉換器及包含其之有機發光顯示器
相關申請案之交互參照
本申請案主張2012年3月6日向韓國智慧財產局提出之韓國申請案NO.10-2012-0022840之優先權及其所有效益,其全部內容整合於此作為參考。
本揭露係關於一種直流(DC)-直流轉換器及包含其之有機發光顯示器,其中該直流-直流轉換器於存在於外部回饋接線若係斷開的情況下能夠正常的操作且無額外損害。
最近,已開發出能夠減少陰極射線管缺點之重量與體重的各種顯示器。此些顯示器的例子有液晶顯示器(LCD)、場效發射顯示器(FED)、電漿顯示面板(PDP)、及有機發光顯示器(OLED)等。
於其中,藉使用以電子與電洞之再結合產生光之有機發光二極體以顯示影像之有機發光顯示器,具有包含快速之反應速度及可於低功率下驅動之優點。
有機發光顯示器係配置以包含顯示模組,該顯示模組包含掃描驅動器、資料驅動器及顯示螢幕之像素單元;及供應電源至顯示模組之直流-直流轉換器。
直流-直流轉換器藉轉換外部電源產生用以驅動像素單元所需之電源。直流-直流轉換器可經由存在於直流-直流轉換器外部之回饋接線接收輸出電壓回饋以適當地調整輸出電源電壓。
即直流-直流轉換器可以當回饋電壓低時增加輸出電壓及當回饋電壓高時減少輸出電壓之方案操作。
然而,若回饋接線因為碰撞或相似之情形而斷開,回饋電壓快速減少,且直流-直流轉換器對應地持續增加輸出電源電壓。
因此,超出允許範圍之電源電壓被供應至配置顯示模組之電路,從而潛在地造成電路損害。
本發明之物件係提供於存在於外部回饋接線若係斷開的情況下能夠正常的操作且無額外損害之直流-直流轉換器。揭露於本文之實施例亦包含一有機發光顯示器包含該直流-直流轉換器。
根據一實施例,提供一種直流-直流轉換器,其包含:產生一輸入電源之電源供應單元;接收輸入電源及來自選擇器之選擇電壓並產生第一電壓之第一電源產生器;連接至第一電源產生器並輸出第一電壓之第一輸出端;接收輸入電源並產生第二電壓之第二電源產生器;連接至第二電源產生器並輸出第二電壓之第二輸出端;提供回饋電壓之外部回饋接線;連接至外部回饋接線 並輸入回饋電壓至選擇器之回饋端;以及連接並傳輸該選擇電壓至第一電源產生器之選擇器,其中選擇電壓係回饋電壓與自第一輸出端輸出之第一電壓的其中之一。
選擇器可包含:包含傳輸選擇電壓至第一電源產生器之第一切換裝置與第二切換裝置之切換單元,其中第一切換裝置可傳輸自第一輸出端輸出之第一電壓,且第二切換裝置可傳輸自回饋端輸入之回饋電壓;以及控制第一切換裝置與該第二切換裝置之交替開啟之控制器。
控制器可包含將回饋電壓與預設參考電壓相比以決定開啟第一切換裝置或第二切換裝置中的哪一個之比較器。若回饋電壓大於預設參考電壓,第二切換裝置可被開啟,且若回饋電壓小於預設參考電壓,第一切換裝置可被開啟。
第一切換裝置與第二切換裝置可以電晶體實現,且控制器可包含:具有連接至回饋端之輸入端及連接至第二反向器之輸入端與第二切換裝置之閘極電極之輸出端之第一反向器;以及具有連接至第一反向器的輸出端之輸入端及連接至第一切換裝置的閘極電極之輸出端之第二反向器。
第一電源產生器可包含:連接於電源供應單元與第一節點間之第一電感;連接於第一節點與接地電源供應器間之第一電晶體;連接於第一節點與第一輸出端間之第二電晶體;控制第一電晶體與第二電晶體之第一切換控制器;及劃分自選擇器供應之電壓以供應劃分的電壓至切換控制器之第一分壓器。
第一分壓器可包含彼此串聯之複數個電阻。
第二電源產生器可包含:連接於電源供應單元與第二節點間之第三電晶體;連接第二節點與第二輸出端之第四電晶體;連接於第二節點與接地 電源供應器間之第二電感;控制第三電晶體與第四電晶體之第二切換控制器;及劃分於第二輸出端之電壓以供應劃分的電壓至第二切換控制器之第二分壓器。
第二分壓器可包含彼此串聯之複數個電阻。
第一電壓可具有正極性,且第二電壓可具有負極性。
根據其他實施例,提供一有機發光顯示器包含:,連接至掃描線、資料線、第一電源線、及第二電源線之複數個像素;產生第一電壓與第二電壓以經由分別地第一電源線與第二電源線供應至像素之直流-直流轉換器,其中直流-直流轉換器包含:產生輸入電源之電源供應單元;接收輸入電源及來自選擇器之選擇電壓並產生第一電壓之第一電源產生器;連接至第一電源產生器並輸出第一電壓之第一輸出端;接收輸入電源並產生第二電壓之第二電源產生器;連接至第二電源產生器並輸出第二電壓之第二輸出端;提供回饋電壓之外部回饋接線;連接至外部回饋接線並輸入回饋電壓至選擇器之回饋端;以及連接並傳輸該選擇電壓至第一電源產生器之選擇器,其中選擇電壓係回饋電壓與自第一輸出端輸出之第一電壓的其中之一。
選擇器可包含:包含傳輸選擇電壓至第一電源產生器之第一切換裝置與第二切換裝置之切換單元,其中第一切換裝置可傳輸自第一輸出端輸出之第一電壓,且第二切換裝置可傳輸自回饋端輸入之回饋電壓;以及控制第一切換裝置與該第二切換裝置之交替開啟之控制器。
控制器可包含將回饋電壓與預設參考電壓相比以決定開啟第一切換裝置或第二切換裝置中的哪一個之比較器。若回饋電壓大於預設參考電 壓,第二切換裝置可被開啟,且若回饋電壓小於預設參考電壓,第一切換裝置可被開啟。
第一切換裝置與第二切換裝置可以電晶體實現,且控制器可包含:具有連接至回饋端之輸入端及連接至第二反向器之輸入端與第二切換裝置之閘極電極之輸出端之第一反向器;以及具有連接至第一反向器的輸出端之輸入端及連接至第一切換裝置的閘極電極之輸出端之第二反向器。
第一電源產生器可包含:連接於電源供應單元與第一節點間之第一電感;連接於第一節點與接地電源供應器間之第一電晶體;連接於第一節點與第一輸出端間之第二電晶體;控制第一電晶體與第二電晶體之第一切換控制器;以及劃分自選擇器供應之電壓以供應劃分的電壓至切換控制器之第一分壓器。
第一分壓器可包含彼此串聯之複數個電阻。
第二電源產生器可包含:連接於電源供應單元與第二節點間之第三電晶體;連接第二節點與第二輸出端之第四電晶體;連接於第二節點與接地電源供應器間之第二電感;控制第三電晶體與第四電晶體之第二切換控制器;及劃分於第二輸出端之電壓以供應劃分的電壓至第二切換控制器之第二分壓器。
第二分壓器可包含彼此串聯之複數個電阻。
第一電壓可具有正極性,且第二電壓可具有負極性。
根據本發明之有機發光二極體可更進一步包含經由掃描線供應掃描訊號至像素之掃描驅動器;及經由資料線供應資料訊號至像素之資料驅動 器。
10‧‧‧像素
12‧‧‧像素電路
20‧‧‧像素單元
30‧‧‧掃描驅動器
40‧‧‧資料驅動器
50‧‧‧時序控制器
60‧‧‧直流-直流轉換器
70‧‧‧電源單元
81‧‧‧第一電源線
82‧‧‧第二電源線
110‧‧‧第一電源產生器
120‧‧‧第二電源產生器
130、130'‧‧‧選擇器
140‧‧‧回饋接線
210、210'‧‧‧控制器
220、220'‧‧‧切換單元
231、231'‧‧‧第一切換裝置
232、232'‧‧‧第二切換裝置
240‧‧‧比較器
250‧‧‧第一反向器
260‧‧‧第二反向器
270‧‧‧下拉電晶體
310‧‧‧第一切換控制器
330‧‧‧第二切換控制器
320‧‧‧第一分壓器
340‧‧‧第二分壓器
Cst、C‧‧‧儲存電容
IN‧‧‧輸入端
OLED‧‧‧有機發光二極體
OUT1‧‧‧第一輸出端
OUT2‧‧‧第二輸出端
Vout1、Vout2‧‧‧電壓
FBP‧‧‧回饋端
Vfbp‧‧‧回饋電壓
L1‧‧‧第一電感
L2‧‧‧第二電感
T1、T2、M1、M2‧‧‧電晶體
M3‧‧‧第三電晶體
M4‧‧‧第四電晶體
N1‧‧‧第一節點
N2‧‧‧第二節點
R1、R2、R3、R4、R‧‧‧電阻
ELVDD‧‧‧第一電源
ELVSS‧‧‧第二電源
Vin‧‧‧輸入電壓
Vref‧‧‧預設參考電壓
D1-Dm‧‧‧資料線
S1-Sn‧‧‧掃描線
附圖與說明書一起說明本發明之某些實施例,且與所述一起用以解釋本發明之原則。
第1圖 係為顯示有機發光顯示裝置之實例之圖;第2圖 係為顯示展示於第1圖之像素之圖;第3圖 係為顯示直流(DC)-直流轉換器之實施例之圖;第4圖 係為顯示展示於第3圖中之直流-直流轉換器之實施例的詳細結構圖;第5圖 係為顯示選擇器之實施例之圖;第6圖 係為顯示選擇器之另一實施例之圖。
於以下詳細描述中,僅展現並藉說明方式簡單描述本發明之某些實施例。領域中之習知技藝者將可理解,所述之實施例可被以各種方式修改而不脫離本發明之精神或範疇。據此,圖示與描述被認為係說明性質且非限制。 另外,當元件被指稱為在其他元件「上」時,其可係直接地在其他元件上或有一或多個中間元件插設於其中而間接地在其他元件上。同時,當一個元件被指稱為「連接至」其他元件時,其可係直接地連接至其他元件或有一或多個中間元件插設於其中而間接地連接至其他元件。本文中相似之參照標號一般指稱相似之元件。
本發明之優點及特徵與達成之方法將由以下參照附圖對某些實施例之詳細描述而闡明。然而本發明並不限於以下所描述之實施例,而是可以各種不同之形式實行。
第1圖係顯示有機發光顯示器之一實施例之圖。
參照第1圖,有機發光顯示器之一實施例可包含:包含像素10之像素單元20,每一個像素10皆接連接至掃描線S1至Sn、資料線D1至Dm、第一電源線81、及第二電源線82;經由掃描線S1至Sn供應掃描訊號至每一個像素10之掃描驅動器30;經由資料線D1至Dm供應資料訊號至每一個像素10之資料驅動器40;及經由第一電源線81與第二電源線82供應第一電源ELVDD與第二電源ELVSS至每一個像素10之直流-直流轉換器60。另外,有機發光顯示器可更進一步包含時序控制器50以控制掃描驅動器30與資料驅動器40。每一個像素10經由第一電源線81與第二電源線82自直流-直流轉換器60接收第一電源ELVDD與第二電源ELVSS,藉自第一電源ELVDD經過有機發光二極體流至第二電源ELVSS之電流產生對應資料訊號之光。
掃描驅動器30藉控制時序控制器50產生掃描訊號,並供應產生之掃描訊號至掃描線S1至Sn。
資料驅動器40藉控制時序控制器50產生資料訊號並供應產生之資料訊號至資料線D1至Dm。
當掃描訊號依序供應至掃描線S1至Sn時,像素10依序為各線所選擇,選擇之像素10接收自資料線D1至Dm傳輸之資料訊號。
第2圖係顯示展示於第1圖中之像素之圖。特別是,為了便於解釋,顯示連結至n-th掃描線Sn與m-th資料線Dm之像素於第2圖中。
參照第2圖,每一個像素10可包含有機發光二極體(OLED)與連接至資料線Dm與掃描線Sn以控制有機發光二極體之像素電路12。
有機發光二極體之陽極電極連接至像素電路12,且其陰極電極連結至第二電源ELVSS。
有機發光二極體對應自像素電路12供應之電流產生具有預定亮度之光。
像素電路12可控制供應至有機發光二極體之電流量,對應當掃描訊號供應至掃描線Sn時供應至資料線Dm之資料訊號。為此,像素電路12包含連接於第一電源ELVDD與有機發光二極體間之第二電晶體T2、連接於第二電晶體T2與資料線Dm及掃描線Sn間之第一電晶體T1、及連接於第二電晶體T2之閘極電極與第一電極間之儲存電容Cst。
第一電晶體T1之閘極電極連接至掃描線Sn,且其第一電極連接至資料線Dm。另外,第一電晶體T1之第二電極連接至儲存電容Cst之一邊端子(side terminal)。第一電極設定為為源極電極與汲極電極其中的一個,且第二電極設定為為源極電極與汲極電極其中的另一個。舉例而言,當第一電極設定為源極電極,第二電極設定為汲極電極。
當掃描訊號自掃描線Sn供應時,連接至資料線Dm及掃描線Sn之第一電晶體T1被開啟,從而供應自資料線Dm供應之資料訊號至儲存電容Cst。 儲存電容Cst以對應資料訊號之電壓充電。
第二電晶體T2之閘極電極連接至儲存電容Cst之一邊端子,且其第一電極連接至儲存電容Cst之另一邊端子與第一電源ELVDD。另外,第二電晶體T2之第二電極連接至有機發光二極體之陽極電極。
第二電晶體T2控制自第一電源ELVDD經過有機發光二極體流至第二電源ELVSS之電流量,對應至儲存於儲存電容Cst之電壓值。有機發光二極體產生光對應至自第二電晶體T2供應之電流。
描述於上之第2圖中之像素結構僅為本發明一實例。因此,根據本發明之像素10不限於具以上所提到之像素結構。像素電路12具有能夠供應電流至有機發光二極體之電路結構,且可選擇以具有任一目前已知之各種結構。
直流-直流轉換器60接收來自電源單元(power source unit)70之輸入電源Vin並轉換輸入電源Vin以產生供應至每一個像素10之第一電源ELVDD與第二電源ELVSS。
第一電源ELVDD可設定具有正極性,且第二電源ELVSS可設定具有負極性。
電源單元70可為提供直流電源至直流-直流轉換器60之輸入端IN之電池或將交流電源(AC)轉換為直流電源之整流設備,但不限於此。
第3圖為顯示直流-直流轉換器之一實施例之圖。
參照第3圖,直流-直流轉換器60之一實施例包含第一電源產生器110、第二電源產生器120、與選擇器130。
第一電源產生器110接收自電源單元70供應之輸入電源Vin以產生第一電源ELVDD,並輸出第一電源ELVDD至第一輸出端OUT1。
輸出至第一電源產生器110之第一輸出端OUT1的第一電源ELVDD係經由第一電源線81供應至每一個像素10。
第一電源產生器110可使用中間裝置提升輸入電源Vin以產生第一電源ELVDD。
另外,可為提升輸入電源Vin之升壓型轉換器之第一電源產生器110,可產生具有正極極性電壓之第一電源ELVDD。
第二電源產生器120接收自電源單元70供應之輸入電源Vin以產生第二電源ELVSS,並輸出第二電源ELVSS至第二輸出端OUT2。
輸出至第二電源產生器120之第二輸出端OUT2的第二電源ELVSS係經由第二電源線82供應至每一個像素10。
第二電源產生器120可使用中間裝置降低輸入電源Vin以產生第二電源ELVSS。
另外,可為降低輸入電源Vin之降壓型轉換器以之第二電源產生器120,可產生具有負極性電壓之第二電源ELVSS。
選擇器130視情況地傳輸自外部回饋接線140輸入至回饋端FBP之回饋電壓Vfbp與在第一輸出端OUT1之電壓Vout1的其中之一至第一電源產生器110。
第一電源產生器110可藉使用由選擇器130回饋之電壓Vfbp或在第一輸出端OUT1之電壓Vout1適當地調整第一電源ELVDD的電壓位準。
回饋接線140可電性連接至存在於直流-直流轉換器60外部之第一電源線81,從而輸入第一電源線81之電壓至直流-直流轉換器60之回饋端FBP。 另外,回饋接線140可電性連結至存在於像素單元20中之第一電源線81。
第一輸出端OUT1與連接至像素10之第一電源線81間產生電壓降,使得電壓差實際上存在於在第一輸出端OUT1之電壓Vout1與第一電源ELVDD電源供應至像素10之電壓間。
於直流-直流轉換器60經由位於由像素單元20、掃描驅動器30、及資料驅動器40所組成之顯示模組外部之可撓性印刷電路板(FPCB)連接至像素10之情況下,以上所述之電壓差大幅增加。
因此,為了更精準的控制第一電源產生器110,有回饋實際使用於顯示模組之電壓而非在第一輸出端OUT1之電壓Vout1的需要。
據此,提供電性連接至存在於顯示模組中之第一電源線81之回饋接線140並提供選擇器130於直流-直流轉換器60中,從而使視情況地供應在第一輸出端OUT1之電壓Vout1與回饋電壓Vfbp中的任一至第一電源產生器110為可能。
在位於直流-直流轉換器60外部之回饋接線140因為碰撞或相似之情況而斷開之情況下,回饋電壓快速減少,使得第一電源產生器110持續增加第一電源ELVDD之電壓輸出至第一輸出端OUT1。因此,組成有機發光二極體之電路或其相似物可能被損壞。
於本文揭露之實施例中,於回饋電壓因如回饋接線140之斷開或其它相似情況之問題而減少之情況下,選擇器130可提供在第一輸出端OUT1之電壓Vout1而非回饋電壓Vfbp至第一電源產生器110。
另外,依據僅使用在第一輸出端OUT1之電壓Vout1,不意圖安裝回饋電路140或斷開安裝之回饋電路140的使用者、生產者等之需要,從而使僅使用在第一輸出端之電壓Vout1為可能。
第4圖為顯示第3圖中之直流-直流轉換器60之詳細構成之圖。
參照第4圖,選擇器130之一實施例可包含控制器210與切換單元
切換單元220包含第一切換裝置231與第二切換裝置232以視情況地傳輸回饋電壓Vfbp與在第一輸出端OUT1之電壓Vout1中的任一至第一電源產生器110。
第一切換裝置231係連接於第一電源產生器110與第一輸出端OUT1間,從而使於其開啟之時間傳輸在第一輸出端OUT1之電壓Vout1至第一電源產生器110為可能。
第二切換裝置232係連接於第一電源產生器110與回饋端FBP間,從而使於其開啟之時間傳輸輸入至回饋端FBP之回饋電壓Vfbp至第一電源產生器110為可能。
為了視情況地回饋回饋電壓Vfbp與在第一輸出端OUT1之電壓Vout1中的任一至第一電源產生器110,第一切換裝置231與第二切換裝置232需交替開啟。
從而,控制器210控制第一切換裝置231與第二切換裝置232使其交錯開啟。
即藉開啟第一切換裝置231並關閉第二切換裝置232,第一輸出端OUT1之電壓Vout1可傳輸至第一電源產生器110。
另外,藉關閉第一切換裝置231並開啟第二切換裝置232,回饋電壓Vfbp可傳輸至第一電源產生器110。
於一些實施例中,配置成切換單元220之第一切換裝置231與第二切換裝置232可以電晶體實現。
參照第4圖,第一電源產生器110可包含第一電感L1、第一電晶體M1、第二電晶體M2、第一切換控制器310、與第一分壓器320。
第一電感L1連接於電源單元70與第一節點N1間。
第一電晶體M1連接於第一節點N1與接地電源供應器間。
第二電晶體M2連接於第一節點N1與第一輸出端OUT1間。
第一切換控制器310控制第一電晶體M1與第二電晶體M2。另外,第一切換控制器310控制第一電晶體M1與第二電晶體M2之開關操作,從而使轉換進入第一電源ELVDD之輸入電壓Vin具有所需之電壓位準為可能。
第一分壓器320劃分自選擇器130供應之電壓(在第一輸出端OUT1之電壓Vout1或回饋電壓Vfbp)以供應劃分之電壓至第一切換控制器310。
更具體而言,第一分壓器320可經由包含於選擇器130之切換單元220接收在第一輸出端OUT1之電壓Vout1或回饋電壓Vfbp。
第一分壓器320可被配置如複數個電阻(例如R1與R2)彼此串聯。
第一切換控制器310接收由第一分壓器320劃分之電壓調整第一電晶體M1與第二電晶體M2之負載比(duty ratios)以對應劃分之電壓,從而使產生所需之第一電源ELVDD為可能。
第一電晶體M1與第二電晶體M2可交替開啟。因此第一電晶體M1與第二電晶體M2可為不同導電形式。舉例而言,當第一電晶體M1為P型電晶體時,第二電晶體M2可為N型電晶體。
參照第4圖,第二電源產生器120可包含第二電感L2、第三電晶體M3、第四電晶體M4、第二切換控制器330、及第二分壓器340。
第三電晶體M3連接於電源單元70與第二節點N2間。
第四電晶體M4連接於第二節點N2與第二輸出端OUT2間。
第二電感L2連接於第二節點N2與接地電源供應器間。
第二切換控制器330控制第三電晶體M3與第四電晶體M4。另外,第二切換控制器330控制第三電晶體M3與第四電晶體M4之開關操作,從而使轉換進入第二電源ELVSS之輸入電壓Vin具有所需之電壓位準為可能。
第二分壓器340劃分傳輸自第二輸出端OUT2之電壓Vout2以供應劃分之電壓至第二切換控制器330。
第二分壓器340可被配置如複數個電阻(例如R3與R4)彼此串聯。
第二切換控制器330接收由第二分壓器340劃分之電壓調整第三電晶體M3與第四電晶體M4之負載比以對應劃分之電壓,從而使產生所需之第二電源ELVSS為可能。
第三電晶體M3與第四電晶體M4可交替開啟。因此第三電晶體M3與第四電晶體M4可為不同導電形式。舉例而言,當第三電晶體M3為N型電晶體時,第四電晶體M4可為P型電晶體。
以上所述之第一電源產生器110與第二電源產生器120之結構僅為實行本發明之實施例。因此本發明不限於此。
第5圖為顯示選擇器實施例之圖。
參照第5圖,於選擇器之一實施例中,控制器210可包含比較器240。
比較器240接收輸入回饋端FBP之回饋電壓Vfbp及預設參考電壓Vref,並比較兩電壓之大小。
比較器240於回饋電壓Vfbp大於預設參考電壓Vref的情況下關閉第一切換裝置231且開啟第二切換裝置232,並於回饋電壓Vfbp小於預設參考電壓Vref的情況下開啟第一切換裝置231且關閉第二切換裝置232。
如第5圖所示,於如實施例之方式,第一切換裝置231係以PMOS電晶體實現且第二切換裝置232係以NMOS電晶體實現的情況下,比較器240之輸出端可連接至第一切換裝置231與第二切換裝置232之閘極電極。
因此,於回饋電壓Vfbp大於預設參考電壓Vref的情況下,當比較器240輸出高位準電壓至其輸出端時,第一切換裝置231可被關閉且第二切換裝置232可被開啟。
因此,回饋電壓Vfbp可經由第二切換裝置232傳輸至第一電源產生器110。更具體而言,回饋電壓Vfbp可經由第二切換裝置232傳輸至第一電源產生器110之第一分壓器320。
另外,於回饋電壓Vfbp小於預設參考電壓Vref的情況下,當比較器240輸出低位準電壓至其輸出端時,第一切換裝置231可被開啟且第二切換裝置232可被關閉。
因此,在第一輸出端OUT1之電壓Vout1可經由第一切換裝置231傳輸至第一電源產生器110。更具體而言,在第一輸出端OUT1之電壓Vout1可經由第一切換裝置231傳輸至第一電源產生器110之第一分壓器320。
當比較器240係設定以於回饋電壓Vfbp大於預設參考電壓Vref的情況下輸出低位準電壓且於回饋電壓Vfbp小於預設參考電壓Vref的情況下輸出高位準電壓時,第一切換裝置231係以NMOS電晶體實現且第二切換裝置232係以PMOS電晶體實現。
透過如上述之結構,於回饋接線140因如斷線或類似情況之問題導致回饋電壓Vfbp小於預設參考電壓Vref的情況下,實施例之選擇器130供應在 第一輸出端OUT1之電壓Vout1而非回饋電壓Vfbp至第一電源產生器110,從而使無額外損害地正常操作有機發光二極體為可能。
另外,控制器210可更進一步包含下拉電阻R位於回饋端FBP與比較器240間之共通節點與接地電源供應器間。
第6圖為顯示選擇器之另一實施例之圖。
參照第6圖,於選擇器130'之另一實施例中,控制器120'可包含第一反向器250與第二反向器260。
另外,包含於切換單元220'之第一切換裝置231'與第二切換裝置232'可以電晶體實現。
第一反向器250具連接至回饋端FBP之輸入端及連接至第二反向器260的輸入端與以電晶體實現之第二切換裝置232'的閘極電極之輸出端。
第二反向器260具有連接至第一反向器250的輸出端之輸入端及連接至以電晶體實現之第一切換裝置231'的閘極電極之輸出端。
另外,控制器210'可更進一步包含下拉電晶體270位於第一反向器250之輸入端與回饋端FBP間之共通節點與接地電源供應器間。下拉電晶體可藉具連結至第一反向器250之輸出端之閘極電極,控制為開啟/關閉。
於正常回饋電壓Vfbp輸入至回饋端FBP之情況下,第一反向器250輸出藉反向回饋電壓Vfbp產生之低位準電壓至輸出端。
據此,閘極電極供應有低位準電壓之第二切換裝置232'被開啟。 從而回饋電壓Vfbp可經由第二切換裝置232'傳輸至第一電源產生器110。更具體而言,回饋電壓Vfbp可經由第二切換裝置232'傳輸至第一電源產生器110之第一分壓器320。
因為第二反向器260具有低位準電壓供應於其輸入端,其輸出藉反向低位準電壓產生之高位準電壓至輸出端。
據此,閘極電極提供有高位準電壓之第一切換裝置231'被關閉。 從而第一輸出端OUT1與第一電源產生器110可彼此電性絕緣。
於回饋接線140之斷線、短路等導致回饋電壓Vfbp快速降低至低位準電壓的情況下,第一反向器250輸出藉反向低位準回饋電壓Vfbp產生之高位準電壓至輸出端。
據此,閘極電極提供有高位準電壓之第二切換裝置232'被關閉。 從而回饋端FBP與第一電源產生器110可彼此電性絕緣。
因為第二反向器260具有高位準電壓提供於其輸入端,其輸出藉反向高位準電壓產生之低位準電壓至輸出端。
據此,閘極電極提供有低位準電壓之第一切換裝置231'被開啟。 從而在第一輸出端OUT1之電壓Vout1可經由第一切換裝置231'傳輸至第一電源產生器110。更具體而言,在第一輸出端OUT1之電壓Vout1可經由第一切換裝置231'傳輸至第一電源產生器110之第一分壓器320。
於此,下拉電晶體270可藉輸出至第一反向器250輸出端之高位準電壓開啟。因此低位準電壓可穩定地供應至第一反向器250之輸入端。
如上所述,根據本發明之某些實施例,縱使存在於其外部之回饋接線斷開,直流-直流轉換器能夠無額外損害地正常操作,並提供包含直流-直流轉換器之有機發光顯示器。
雖然本發明結合某些實施例而描述,應被理解的是,本發明不限 於所揭露之實施例,而是相反地,意圖包含各種修改與等效安排於附隨之申請專利之精神與範疇內,及其等效範圍。
60‧‧‧直流-直流轉換器
70‧‧‧電源單元
110‧‧‧第一電源產生器
120‧‧‧第二電源產生器
130‧‧‧選擇器
140‧‧‧回饋接線
ELVDD‧‧‧第一電源
ELVSS‧‧‧第二電源
Vout1‧‧‧電壓
Vfbp‧‧‧回饋電壓
Vin‧‧‧輸入電壓
IN‧‧‧輸入端
OUT1‧‧‧第一輸出端
OUT2‧‧‧第二輸出端
FBP‧‧‧回饋端

Claims (19)

  1. 一種直流-直流轉換器,其包含:一第一電源產生器,配置以:自一電源供應單元接收一輸入電源,自一選擇器接收一選擇電壓並產生一第一電壓;一第一輸出端,連接至該第一電源產生器並配置以輸出該第一電壓;一第二電源產生器,配置以自該電源供應單元接收該輸入電源,並更配置以產生一第二電壓;一第二輸出端,連接至該第二電源產生器並配置以輸出該第二電壓;一回饋端,連接至一外部回饋接線並配置以輸入一回饋電壓至該選擇器;以及該選擇器,係連接至該第一電源產生器並配置以傳輸該選擇電壓至該第一電源產生器,其中該選擇電壓係自該回饋端輸入之該回饋電壓與自該第一輸出端輸出之該第一電壓的其中之一,其中該選擇器包含:一切換單元,其包含配置以傳輸該選擇電壓至該第一電源產生器之一第一切換裝置與一第二切換裝置,其中該第一切換裝置係配置以傳輸自該第一輸出端輸出之該第一電壓,且該第二切換裝置係配置以傳輸自該回饋端輸入之該回饋電壓;以及 一控制器,配置以開啟該第一切換裝置與該第二切換裝置中之任一個。
  2. 如申請專利範圍第1項所述之直流-直流轉換器,其中該控制器包含配置以比較該回饋電壓與一預設參考電壓以決定開啟該第一切換裝置或該第二切換裝置之一比較器。
  3. 如申請專利範圍第2項所述之直流-直流轉換器,其中該比較器於該回饋電壓大於該預設參考電壓時開啟該第二切換裝置,並於該回饋電壓小於該預設參考電壓時開啟該第一切換裝置。
  4. 如申請專利範圍第1項所述之直流-直流轉換器,其中該第一切換裝置與該第二切換裝置以一電晶體實現;且其中該控制器包含:一第一反向器,具有連接至該回饋端之一輸入端及連接至一第二反向器之一輸入端與該第二切換裝置之一閘極電極之一輸出端;以及該第二反向器,具有連接至該第一反向器之該輸出端之該輸入端及連接至該第一切換裝置之一閘極電極之一輸出端。
  5. 如申請專利範圍第1項所述之直流-直流轉換器,其中該第一電源產生器包含:一第一電感,連接於該電源供應單元與一第一節點間;一第一電晶體,連接於該第一節點與一接地電源供應器間;一第二電晶體,連接於該第一節點與該第一輸出端間;一第一切換控制器,配置以控制該第一電晶體與該第二電晶體;以及 一第一分壓器,配置以劃分自該選擇器供應之一電壓以供應該劃分的電壓至該第一切換控制器。
  6. 如申請專利範圍第5項所述之直流-直流轉換器,其中該第一分壓器包含彼此串聯之複數個電阻。
  7. 如申請專利範圍第1項所述之直流-直流轉換器,其中該第二電源產生器包含:一第三電晶體,連接於該電源供應單元與一第二節點間;一第四電晶體,連接該第二節點與該第二輸出端;一第二電感,連接於該第二節點與一接地電源供應器間;一第二切換控制器,配置以控制該第三電晶體與該第四電晶體;以及一第二分壓器,配置以劃分於該第二輸出端之一電壓以供應該劃分的電壓至該第二切換控制器。
  8. 如申請專利範圍第7項所述之直流-直流轉換器,其中該第二分壓器包含彼此串聯之複數個電阻。
  9. 如申請專利範圍第7項所述之直流-直流轉換器,其中該第一電壓具有一正極性,且該第二電壓具有一負極性。
  10. 一種有機發光顯示器,其包含:複數個像素,連接至複數條掃描線、複數條資料線、一第一電源線、及一第二電源線;一直流-直流轉換器,產生一第一電壓與一第二電壓以分別地經由該第一電源線與該第二電源線供應至該些像素;以及一電源供應單元,配置以產生一輸入電源, 其中該直流-直流轉換器包含:一第一電源產生器,配置以:自該電源供應單元接收該輸入電源,自一選擇器接收一選擇電壓,並產生該第一電壓;一第一輸出端,連接至該第一電源產生器並配置以輸出該第一電壓;一第二電源產生器,配置以自該電源供應單元接收該輸入電源,並更配置以產生該第二電壓;一第二輸出端,連接至該第二電源產生器並配置以輸出該第二電壓;以及該選擇器,連接至該第一電源產生器並配置以傳輸該選擇電壓至該第一電源產生器,其中該選擇電壓係自外部的一回饋端輸入之一回饋電壓與自該第一輸出端輸出之該第一電壓的其中之一,其中該選擇器包含:一切換單元,其包含配置以傳輸該選擇電壓至該第一電源產生器之一第一切換裝置與一第二切換裝置,其中該第一切換裝置係配置以傳輸自該第一輸出端輸出之該第一電壓,且該第二切換裝置係配置以傳輸自該回饋端輸入之該回饋電壓;以及一控制器,配置以開啟該第一切換裝置與該第二切換裝置中之任一個。
  11. 如申請專利範圍第10項所述之有機發光顯示器,其中該控制器包含配置以比較該回饋電壓與一預設參考電壓以決定開啟該 第一切換裝置或該第二切換裝置之一比較器。
  12. 如申請專利範圍第11項所述之有機發光顯示器,其中該比較器於該回饋電壓大於該預設參考電壓時開啟該第二切換裝置,並於該回饋電壓小於該預設參考電壓時開啟該第一切換裝置。
  13. 如申請專利範圍第10項所述之有機發光顯示器,其中該第一切換裝置與該第二切換裝置以一電晶體實現;且其中該控制器包含:一第一反向器,具有連接至該回饋端之一輸入端及連接至一第二反向器之一輸入端與該第二切換裝置之一閘極電極之一輸出端;以及該第二反向器,具有連接至該第一反向器之該輸出端之該輸入端及連接至該第一切換裝置之一閘極電極之一輸出端。
  14. 如申請專利範圍第10項所述之有機發光顯示器,其中該第一電源產生器包含:一第一電感,連接於該電源供應單元與一第一節點間;一第一電晶體,連接於該第一節點與一接地電源供應器間;一第二電晶體,連接於該第一節點與該第一輸出端間;一第一切換控制器,配置以控制該第一電晶體與該第二電晶體;以及一第一分壓器,配置以劃分自該選擇器供應之一電壓以供應該劃分的電壓至該第一切換控制器。
  15. 如申請專利範圍第14項所述之有機發光顯示器,其中該第一分壓器包含彼此串聯之複數個電阻。
  16. 如申請專利範圍第10項所述之有機發光顯示器,其中該第二電源產生器包含:一第三電晶體,連接於該電源供應單元與一第二節點間;一第四電晶體,連接該第二節點與該第二輸出端;一第二電感,連接於該第二節點與一接地電源供應器間;一第二切換控制器,配置以控制該第三電晶體與該第四電晶體;以及一第二分壓器,配置以劃分於該第二輸出端之一電壓以供應該劃分的電壓至該第二切換控制器。
  17. 如申請專利範圍第16項所述之有機發光顯示器,其中該第二分壓器包含彼此串聯之複數個電阻。
  18. 如申請專利範圍第10項所述之有機發光顯示器,其中該第一電壓具有一正極性,且該第二電壓具有一負極性。
  19. 如申請專利範圍第10項所述之有機發光顯示器,其更包含:一掃描驅動器,配置以經由該些掃描線供應掃描訊號至該些像素;及一資料驅動器,配置以經由該些資料線供應資料訊號至該些像素。
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