TWI644303B - 顯示裝置之驅動方法 - Google Patents

顯示裝置之驅動方法 Download PDF

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TWI644303B
TWI644303B TW106143599A TW106143599A TWI644303B TW I644303 B TWI644303 B TW I644303B TW 106143599 A TW106143599 A TW 106143599A TW 106143599 A TW106143599 A TW 106143599A TW I644303 B TWI644303 B TW I644303B
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light
pixel array
emitting
duration
pulse
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TW106143599A
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TW201928936A (zh
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陳建任
戴翊祐
王倉鴻
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友達光電股份有限公司
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Priority to TW106143599A priority Critical patent/TWI644303B/zh
Priority to CN201810114898.3A priority patent/CN108269517B/zh
Priority to US15/924,751 priority patent/US10600367B2/en
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    • 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
    • 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
    • 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
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/04Structural and physical details of display devices
    • G09G2300/0439Pixel structures
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/08Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/08Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809Several active elements per pixel in active matrix panels
    • G09G2300/0842Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G09G2300/0861Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/02Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264Details of driving circuits
    • G09G2310/0267Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/08Details of timing specific for flat panels, other than clock recovery
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/06Adjustment of display parameters
    • G09G2320/0626Adjustment of display parameters for control of overall brightness
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/06Adjustment of display parameters
    • G09G2320/0626Adjustment of display parameters for control of overall brightness
    • G09G2320/064Adjustment of display parameters for control of overall brightness by time modulation of the brightness of the illumination source
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02Details of power systems and of start or stop of display operation
    • G09G2330/021Power management, e.g. power saving
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00Aspects of the architecture of display systems
    • G09G2360/14Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen

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

Abstract

一種顯示裝置之驅動方法。顯示裝置包含第一驅動電路與畫素陣列。驅動方法包含以下步驟。於第一模式中,藉由第一驅動電路,接收第一發光啟動訊號以驅動畫素陣列。第一發光啟動訊號包含複數個第一脈衝,該些第一脈衝每一者之持續時間分別與第一幀以及至少一第二幀每一者至少部分期間重疊。於第二模式中,藉由第一驅動電路,接收第二發光啟動訊號以驅動畫素陣列。第二發光啟動訊號包含第二脈衝,第二脈衝之持續時間與第一幀至少部分期間重疊,並且第二發光啟動訊號於至少一第二幀期間內維持在第一位準。

Description

顯示裝置之驅動方法
本揭示內容是一種顯示技術,且特別是有關於一種顯示裝置之驅動方法。
當顯示器運作在跳幀(Frame skip)的模式時,通常驅動電路所接收的發光啟動訊號與發光時脈訊號仍然會在每一個幀期間內切換,因此導致整體功率消耗難以有效地降低。
本揭示內容之一態樣是提供一種顯示裝置之驅動方法。顯示裝置包含第一驅動電路與畫素陣列。驅動方法包含以下步驟。於第一模式中,藉由第一驅動電路,接收第一發光啟動訊號以驅動畫素陣列。第一發光啟動訊號包含複數個第一脈衝,該些第一脈衝每一者之持續時間分別與第一幀以及至少一第二幀每一者至少部分期間重疊。於第二模式中,藉由第一驅動電路,接收第二發光啟動訊號以驅動畫素陣列。第二發光啟動訊號包含第二脈衝,第 二脈衝之持續時間與第一幀至少部分期間重疊,並且第二發光啟動訊號於至少一第二幀期間內維持在第一位準。
綜上所述,本揭示內容的顯示裝置可運作於第一模式(即一般顯示模式)與第二模式(跳幀模式)。當運作於第二模式時,顯示裝置可透過將第一模式中第一幀與至少一第二幀期間內的第一發光啟動訊號的數個第一脈衝整合為第二模式中對應於第一幀的第二發光啟動訊號的第二脈衝,以有效地維持亮度表現並減少功率消耗。
以下將以實施方式對上述之說明作詳細的描述,並對本揭示內容之技術方案提供更進一步的解釋。
100‧‧‧顯示裝置
110、130、140‧‧‧驅動電路
120‧‧‧畫素陣列
VST、VST1、VST2‧‧‧掃描啟動訊號
VST_CLK、VST1_CLK、VST2_CLK‧‧‧掃描時脈訊號
EMST、EMST1、EMST2、EMST2-1、EMST2-2、EMST2-3、EMST2-4‧‧‧發光啟動訊號
EMST_CLK、EMST1_CLK、EMST2_CLK、EMST2-1_CLK、EMST2-2_CLK、EMST2-3_CLK、EMST2-4_CLK‧‧‧發光時脈訊號
F1~F4‧‧‧幀
VH1、VH2、VH3、VH4‧‧‧高位準
VL1、VL2、VL3、VL4‧‧‧低位準
T1、T2、T3、T31、T32‧‧‧持續時間
為讓本揭示內容之上述和其他目的、特徵、優點與實施例能更明顯易懂,所附圖示之說明如下:第1圖係說明本揭示內容一實施例之顯示裝置之示意圖;第2圖係說明本揭示內容一實施例之掃描啟動訊號、掃描時脈訊號、發光啟動訊號與發光時脈訊號之時序示意圖;第3圖係說明本揭示內容一實施例之掃描啟動訊號、掃描時脈訊號、發光啟動訊號與發光時脈訊號之時序示意圖;第4圖係說明本揭示內容一實施例之掃描啟動訊號、發光啟動訊號與發光時脈訊號之時序示意圖;以及第5圖係說明本揭示內容一實施例之發光啟動訊號之時序示意圖。
以下揭示提供許多不同實施例或例證用以實施本揭示內容的特徵。本揭示在不同例證中可能重複引用數字符號且/或字母,這些重複皆為了簡化及闡述,其本身並未指定以下討論中不同實施例且/或配置之間的關係。
於實施方式與申請專利範圍中,除非內文中對於冠詞有所特別限定,否則「一」與「該」可泛指單一個或複數個。將進一步理解的是,本文中所使用之「包含」、「包括」、「具有」及相似詞彙,指明其所記載的特徵、區域、整數、步驟、操作、元件與/或組件,但不排除其所述或額外的其一個或多個其它特徵、區域、整數、步驟、操作、元件、組件,與/或其中之群組。
關於本文中所使用之「耦接」或「連接」,均可指二或多個元件相互直接作實體或電性接觸,或是相互間接作實體或電性接觸,而「耦接」或「連接」還可指二或多個元件相互操作或動作。相對的,當一元件被稱為「直接連接」或「直接耦接」至另一元件時,其中是沒有額外元件存在。
關於本文中所使用之「約」、「大約」或「大致約」一般通常係指數值之誤差或範圍約百分之二十以內,較好地是約百分之十以內,而更佳地則是約百分之五以內。文中若無明確說明,其所提及的數值皆視作為近似值,即如「約」、「大約」或「大致約」所表示的誤差或 範圍。
請參考第1圖,第1圖係說明本揭示內容一實施例之顯示裝置100之示意圖。顯示裝置100包含驅動電路110、130、140與畫素陣列120。於一實施例中,驅動電路110、130可以是閘極驅動陣列(Gate on array,GOA)電路,驅動電路140可以是源極驅動電路。如第1圖所示,驅動電路110設置於畫素陣列120的一側,驅動電路130則相對驅動電路110設置於畫素陣列120的另一側,但本揭示內容不以此為限。於另一實施例中,驅動電路110、130可設置於畫素陣列120的同一側。驅動電路110用以接收發光啟動訊號EMST與發光時脈訊號EMST_CLK以驅動畫素陣列120,驅動電路130用以接收掃描啟動訊號VST與掃描時脈訊號VST_CLK以驅動該畫素陣列120。
操作上,請同時參考第1圖與第2圖。第2圖係說明本揭示內容一實施例之掃描啟動訊號VST1、掃描時脈訊號VST1_CLK、發光啟動訊號EMST1與發光時脈訊號EMST1_CLK之時序示意圖。於第一模式(例如一般顯示模式)中,驅動電路110接收發光啟動訊號EMST1與發光時脈訊號EMST1_CLK以驅動畫素陣列120,驅動電路130接收掃描啟動訊號VST1與掃描時脈訊號VST1_CLK以驅動該畫素陣列120。須說明的是,掃描啟動訊號VST1包含複數個脈衝,上述脈衝每一者的持續時間T2分別位於幀F1~F4每一者的期間內。發光啟動訊號EMST1包含複數個脈衝,並且上述脈衝每一者的持續時間T1分別與幀F1~F4 每一者的至少部分期間重疊。舉例而言,於幀F1內,發光啟動訊號EMST1的脈衝持續時間T1約為幀F1期間的10%。類似地,於幀F2~F4期間,發光啟動訊號EMST1的脈衝持續時間T1分別約為幀F2~F4期間每一者的10%。
關於第一模式的掃描時脈訊號VST1_CLK與發光時脈訊號EMST1_CLK,於幀F1~F4期間,掃描時脈訊號VST1_CLK反覆切換至高位準VH2與低位準VL2,發光時脈訊號EMST1_CLK反覆切換至高位準VH4與低位準VL4。
於本實施例中,以幀F1為例說明,驅動電路110、130為P型薄膜電晶體的閘極驅動陣列電路,因此位於高位準VH1的掃描啟動訊號VST1的部分為禁能訊號,而幀F1當中位於低位準VL1的掃描啟動訊號VST1的部分則為致能訊號;同理,位於高位準VH3的發光啟動訊號EMST1的脈衝為禁能訊號,而幀F1當中位於低位準VL3的發光啟動訊號EMST1的部分則為致能訊號,但本揭示內容不以此為限。
請同時參考第1圖與第3圖。第3圖係說明本揭示內容一實施例之掃描啟動訊號VST2、掃描時脈訊號VST2_CLK、發光啟動訊號EMST2與發光時脈訊號EMST2_CLK之時序示意圖。於第二模式(例如跳幀(Frame skip)模式)中,驅動電路110接收發光啟動訊號EMST2與發光時脈訊號EMST2_CLK以驅動畫素陣列120,驅動電路130接收掃描啟動訊號VST2與掃描時脈訊 號VST2_CLK以驅動該畫素陣列120。
須說明的是,掃描啟動訊號VST2包含一個脈衝,上述脈衝的持續時間T2位於幀F1期間內,並且掃描啟動訊號VST2於幀F2~F4期間內均維持在高位準VH1。換言之,於第二模式中,幀F1維持正常運作以更新畫面,幀F2~F4被跳過(Skipped)而不進行畫面更新,因此可減少功率消耗,並且第二模式的頻率降為第一模式的頻率的四分之一,但本揭示內容不以此為限。發光啟動訊號EMST2包含一個脈衝,並且上述脈衝的持續時間T3與幀F1的至少部分期間重疊,並且發光啟動訊號EMST2於幀F2~F4期間內維持在低位準VL3。須說明的是,發光啟動訊號EMST1的脈衝持續時間T1分別約為幀F1~F4期間每一者的10%,因此發光啟動訊號EMST2的脈衝持續時間T3可以是幀F1~F4總期間的10%。換言之,於本實施例中,發光啟動訊號EMST2的脈衝持續時間T3為發光啟動訊號EMST1的脈衝每一者的持續時間T1的總和(亦即T3=4*T1)。
關於第二模式的掃描時脈訊號VST2_CLK與發光時脈訊號EMST2_CLK,於幀F1期間,掃描時脈訊號VST2_CLK反覆切換至高位準VH2與低位準VL2,並且於幀F2~F4期間,掃描時脈訊號VST2_CLK維持於高位準VH2。另一方面,發光時脈訊號EMST2_CLK於幀F1期間開始反覆切換至高位準VH4與低位準VL4,並持續反覆切換至高位準VH4與低位準VL4直到對應幀F1之資料傳送至畫素陣列120為止。當對應幀F1之資料傳送至畫素陣列120 之後,發光時脈訊號EMST2_CLK維持於高位準VH4直到幀F4結束。
如此一來,相較於第一模式,於第二模式中的顯示裝置100可透過將第一模式中幀F1~F4期間內的發光啟動訊號EMST1的數個脈衝(持續時間T1)整合為第二模式中對應於幀F1的發光啟動訊號EMST2的脈衝(持續時間T3),以及透過縮短在跳過幀F2~F4期間內的發光時脈訊號EMST2_CLK之輸出,以有效地維持幀F1~F4期間內的亮度表現並減少功率消耗。
須補充的是,上述高位準VH1、VH2、VH3、VH4可以是相同或不同的電壓位準,低位準VL1、VL2、VL3、VL4可以是相同或不同的電壓位準。
或者,於另一實施例中,可調整發光啟動訊號EMST2與發光時脈訊號EMST2_CLK的時序。如第4圖所示,發光啟動訊號EMST2-1、EMST2-2的脈衝上升緣領先於幀F1期間。由於發光啟動訊號EMST2的脈衝之持續時間T3位於幀F1期間內,因此發光啟動訊號EMST2-1、EMST2-2的脈衝領先於發光啟動訊號EMST2。須說明的是,於本實施例中,發光啟動訊號EMST2、EMST2-1、EMST2-2的脈衝的持續時間T3均與掃描啟動訊號VST2的脈衝的持續時間T2重疊。
或者,於另一實施例中,為了達到良好的亮度表現,顯示裝置100可偵測畫素陣列120的亮度以供調整發光啟動訊號EMST2的脈衝的持續時間T3的寬度。舉例而 言,當畫素陣列120的亮度大於第一亮度門檻值(可依實際需求彈性設計為過亮的亮度門檻值)時,將發光啟動訊號EMST2-3的脈衝的持續時間增加為時間T31,如第5圖所示。舉另一例而言,當畫素陣列120的亮度小於第二亮度門檻值(可依實際需求彈性設計為過暗的亮度門檻值)時,將發光啟動訊號EMST2-4的脈衝的持續時間縮短為時間T32,如第5圖所示。須說明的是,上述第一亮度門檻值可與第二亮度門檻值相同或不同。
綜上所述,本揭示內容的顯示裝置100可運作於第一模式(即一般顯示模式)與第二模式(即跳幀模式)。當運作於第二模式時,顯示裝置100可透過將第一模式中幀F1~F4期間內的發光啟動訊號EMST1的數個脈衝(持續時間T1)整合為第二模式中對應於幀F1的發光啟動訊號EMST2的脈衝(持續時間T3),以及透過縮短在跳過幀F2~F4期間內的發光時脈訊號EMST2_CLK之輸出,以有效地維持幀F1~F4期間內的亮度表現並減少功率消耗。
雖然本案已以實施方式揭露如上,然其並非用以限定本案,任何熟習此技藝者,在不脫離本案之精神和範圍內,當可作各種之更動與潤飾,因此本案之保護範圍當視後附之申請專利範圍所界定者為準。

Claims (9)

  1. 一種顯示裝置之驅動方法,其中該顯示裝置包含一第一驅動電路與一畫素陣列,該驅動方法包含:於一第一模式中,藉由該第一驅動電路,接收一第一發光啟動訊號以驅動該畫素陣列,其中該第一發光啟動訊號包含複數個第一脈衝,該些第一脈衝每一者之一持續時間分別與一第一幀以及至少一第二幀每一者至少部分期間重疊;以及於一第二模式中,藉由該第一驅動電路,接收一第二發光啟動訊號以驅動該畫素陣列,其中該第二發光啟動訊號包含一第二脈衝,該第二脈衝之一持續時間與該第一幀至少部分期間重疊,並且該第二發光啟動訊號於該至少一第二幀期間內維持在一第一位準;其中該第二發光啟動訊號之該第二脈衝之一上升緣領先於該第一幀期間。
  2. 如請求項1所述之驅動方法,其中該顯示裝置更包含一第二驅動電路,該驅動方法更包含:藉由該第二驅動電路,接收一掃描啟動訊號以驅動該畫素陣列,其中該掃描啟動訊號包含一第三脈衝,該第三脈衝之一持續時間位於該第一幀期間內,並且該掃描啟動訊號於該至少一第二幀期間內維持在一第二位準。
  3. 如請求項2所述之驅動方法,更包含:藉由該第二驅動電路,接收一掃描時脈訊號以驅動該畫素陣列,其中該掃描時脈訊號於該第一幀期間內切換至一第三位準與一第四位準至少一次,並且該掃描時脈訊號於該至少一第二幀期間內維持在該第三位準。
  4. 如請求項1所述之驅動方法,更包含:藉由該第一驅動電路,接收一發光時脈訊號以驅動該畫素陣列,其中該發光時脈訊號於該第一幀期間開始反覆切換至一第五位準與一第六位準,並持續反覆切換至該第五位準與該第六位準直到對應該第一幀之資料傳送至該畫素陣列為止,並且當對應該第一幀之該資料傳送至該畫素陣列之後,該發光時脈訊號維持在該第五位準。
  5. 如請求項2所述之驅動方法,其中該第三脈衝之該持續時間與該第二脈衝之該持續時間重疊。
  6. 如請求項5所述之驅動方法,其中該第二發光啟動訊號之該第二脈衝之該持續時間位於該第一幀期間內。
  7. 如請求項1所述之驅動方法,更包含:偵測該畫素陣列之一亮度以調整該第二脈衝之該持續時間。
  8. 如請求項7所述之驅動方法,其中偵測該畫素陣列之亮度以調整該第二脈衝之該持續時間包含:當該畫素陣列之該亮度大於一亮度門檻值時,增加該第二發光啟動訊號之該第二脈衝之該持續時間。
  9. 如請求項7所述之驅動方法,其中偵測該畫素陣列之亮度以調整該第二脈衝之該持續時間包含:當該畫素陣列之亮度小於一亮度門檻值時,縮短該第二發光啟動訊號之該第二脈衝之該持續時間。
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