TWI303796B - Active matrix organic light emitting diode flat-panel display - Google Patents

Active matrix organic light emitting diode flat-panel display Download PDF

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TWI303796B
TWI303796B TW091105728A TW91105728A TWI303796B TW I303796 B TWI303796 B TW I303796B TW 091105728 A TW091105728 A TW 091105728A TW 91105728 A TW91105728 A TW 91105728A TW I303796 B TWI303796 B TW I303796B
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Taiwan
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display
color
programmable power
light
power supply
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TW091105728A
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Steven Cok Ronald
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Eastman Kodak Co
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control 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
    • G09G3/22—Control 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
    • G09G3/30—Control 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control 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
    • G09G3/22—Control 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
    • G09G3/30—Control 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
    • G09G3/32—Control 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]
    • G09G3/3208—Control 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]
    • G09G3/3225—Control 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
    • G09G3/3233—Control 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 current through the light-emitting element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control 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
    • G09G3/22—Control 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
    • G09G3/30—Control 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
    • G09G3/32—Control 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]
    • G09G3/3208—Control 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]
    • G09G3/3225—Control 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
    • G09G3/3258—Control 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active 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
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active 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
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/029—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G09G2320/045—Compensation of drifts in the characteristics of light emitting or modulating elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/145—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen
    • G09G2360/147—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen the originated light output being determined for each pixel
    • G09G2360/148—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light originating from the display screen the originated light output being determined for each pixel the light being detected by light detection means within each pixel

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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)
  • Control Of El Displays (AREA)
  • Electroluminescent Light Sources (AREA)

Description

1303796 A7 B7 五、發明説明（1 ) 本發明係關於有機發光二極體（organic light emitting diode，簡輝;OLED)平面顯示器，尤指用於在一種主動矩陣 式平面6LED顯示器之發光元件補償老化效應之裝置。 人們建議有機發光二極體（organic light emitting diode， 簡稱OLED)平面顯示器裝置，供配合計算裝置，特別是配 合手提式裝置使用。顯示器之效率及有效性隨時間而變 化，並且顯示器之品質下降，特別是供諸如成像之敏感應 用。在品質上之此種減低，係由於在包含顯示器之材料隨 時間之變化，在電子組件之衰變等等。 特別是，OLED顯示器裝置受到在顯示器内之有機發光 材料之變化所影響。變化影響顯示器之效率及亮度。此等 變化也可能為彩色相依，亦即變化以不同方式影響在顯示 器裝置之不同彩色，因而不僅顯示器裝置之功率效率隨時 間而減低，而且彩色平衡有所變化。此等變化可能導致具 有不良亮度及彩色呈現之次級顯示器。 在一種主動矩陣式OLED顯示器（如圖1中所示），每一發 光元件由一關聯之控制電路予以個別控制，其包括一儲存 資料信號之電容器4。電容器通過一連接至資料線1及選擇 線3之電晶體2予以充電。一電晶體6予以在一電源8與接地 之間與發光元件7串聯連接。電容器予以連接至電晶體之 閘，以依據儲存在電容器之電荷量，控制通過發光元件之 電流，藉以確定發光元件之亮度。在發光元件對電流之響 應由於發光材料之老化而下降時，可增加在控制電路儲存 在電容器之信號或增加電源電壓，藉以重新校準發光元 本紙張尺度適用中國國家標準(CNS) A4規格(210X 297公釐） 1303796
件。在任一情形，均需要有所介入。 因此需.要一種自動校正一主動矩陣式〇LED平面顯示器 之亮度灰彩色呈現之改進方法。 根據本發明提供一種主動矩陣式〇LED平面顯示器，而 藉以滿足該需要，其包括許多發光元件及關聯之控制電 路；一可程式電源連接至控制電路；一感測器供感測一個 或多個發光元件之光輸出，以產生一回授信號；及一顯示 器控制器響應回授信號，供將可程式電源設計程式以補償 在自發光元件輸出之光之變化。 當在顯示器内之材料降低時，本發明具有隨時間自動校 正彩色之彩色平衡及顯示器系統之亮度之優點。 圖1為示意電路圖，示一種先前技藝主動矩陣式發光像 素， 圖2為略圖，示一種根據本發明之改進之電壓控制顯示 器， 圖3為略圖，示一種根據本發明具有多重彩色之改進之 電壓控制顯示器，以及 圖4為一略圖，示一種根據本發明，之改進之電壓控制 顯示器，彳多重彩色整合成為一有該顯示器之共同 包裝。 平面顯示器裝置當其使用時隨時間而降低。特別是，發 光材料變成較欠缺效率，導致損失亮度及在彩色呈現之^ 確度。供每一發光元件之亮度予以電壓或電流控制之此等 平面顯示器裝置，本發明提m统其中—可程式電源 p張尺度@家料(CNS) μ胁(21QX297公爱)- 1303796 A7 B7 五 發明説明（ 用以修改顯示器裝置之操作特徵。 請參照·圖2，一平面顯示器系統1〇包括一有發光元件14 之平面顯示器1 2，一有一可程式電源2 〇之顯示器控制器 1 8，及一感測器24。感測器24檢測在顯示器在一光元件 1 4所發出或控制光之亮度，並提保此資訊至控制器1 8。控 制器然後以自發光元件1 4維持適當亮度所必要之校正電壓 或電流參數將電源2 0設計程式。 在圖3中示一種供在彩色平面裝置使用之較複雜實施 例，其中單獨之感測器2 5，2 6及2 7示為供發光元件1 5， 1 6及1 7。感測器2 5，2 ό及2 7提供信號至顯示器控制器 18。控制器將電源2丨，22及2 3設計程式，其然後通過電 源線3 1，32及33修改在顯示器裝置内之發光元件之操作 特徵。與感測器25-27關聯提供信號至顯示器控制器“將 電源25 -27設計程式之每一發光元件15-17 一般各為顯示 器之彩色，例如紅，綠，及藍之一。此等感測器可產生單 獨之信號在單獨之線施加至控制器，或信號可予以多工處 理，並在一共用信號線供給至控制器。 當每-發光元件隨時間而變化時，驅動關聯元件之每_ 電源可予以獨立修改，以提供與維持裝置之彩色平衡—致 之適當亮度。例如’如果紅元件變成有一半效率，可依必 要增加提供至紅色元件之功率以行補償，因此維持原 无度及彩色平衡。本發明補償在發光元件之效率之變化之 二力’:而T/件所可經得起之最大功率(電壓或： 机）。因而，如在先前實例’如果紅元件無法經得起較大 本纸張尺度適用中國國家標準(CNS) 1303796
五、發明説明（4 功率:可減低綠色及藍色功率，以維持—致之彩色平衡， 而以亮度為代價。 本發·明之组件可在内部在—平面顯示器内予以實施，例 如在共同基板上，或在一共同包裝内，或在外部在一單 獨之整合電路或印刷電路板實施：制是，可程式電源可 在共同包裝内或在一作為平面顯示器之共同基板上予以實 施，以如圖4中所示，使供平面顯示器所必要之電引線數 I最小。個別電源可自一提供至平面顯示器之共同電源3 〇 造成其單獨之電源◊如果在外部獲得供單獨之每一组元件 之功率至平面包裝，則必要一引線供每一電源。 如果電源組件為在平面裝置之内部，其可容易通過位 址，資料，及控制線34，使用習知數位邏輯及類比功率裝 置接近。如果組件為在顯示器裝置外部，可利用習知積體 電路技術及包裝在積體電路内提供可程式電壓電路。電流 及電壓控制裝置在先前技藝為熟知者，並使用於商用產 品。 在一種較佳實施例，在一種裝置採用本發明，如在（但 不限於）1988年9月6日授予Tang等人之美國專利4,769,292 號，及1991年10月29日授予VanSlyke等人之美國專利 5,061，569號中，所揭示，其包括其由小分子聚合物〇LED 所構成之有機發光二極體（organic light emiuing di〇de，簡 稱OLED)。有機發光顯示器之很多組合及變化可用以製造 此種裝置。 本紙張尺度適用中國國家標準(CNS) A4規格(210X 297公釐）

Claims (1)

  1. A8 B8 =+5728號專利申請案 B8 圍替換本(92年12月)¾ 申請專利範圍 K 一種主動矩陣式OLED平面彩色顯示器，包含 a) 多個發光元件，用以發出不同彩色，以及相關之控 制電路； b) —可程式電源，連接至該控制電路； c ) 一分離感測器，供感測由該顯示器發出之每一彩色 之光’以產生用於每一彩色之一回授信號；以及 d) —顯示器控制器，響應該個別之回授信號，供將該 可程式電源程式化，以補償在自發光元件輸出之光之變 化。 2·如申請專利範圍第1項之顯示器，另包含單獨之可程式電 源’供在平面顯示器之每一彩色。 3 ·如申凊專利範圍第1項之顯示器，其中可程式電源與該顯 示器在一共同基板上。 4·如申請專利範圍第1項之顯示器，其中可程式電源與該顯 示器各自在分開之基板。 5 ·如申請專利範圍第i項之顯示器，其中可程式電源與該顯 示器在一之共同包裝中。 6. 如申請專利範圍第丨項之顯示器，其中可程式電源該顯示 器各自在分開之包裝中。 7. 如申請專利範圍第1項之顯示器，其中可程式電源為可定 址如一儲存元件。 8. —種控制一具有多個不同彩色發光元件及相關控制電路 之主動矩陣式OLED平面彩色顯示器之方法，勺本 步驟·· 匕口下列 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐) A BCD
    1303796 a) 提供一可程式電源至連接到控制電路每一彩色， b) 感測供每一彩色之一個或多個發光元件之光輸出， 以供每一彩色產生一回授信號；以及 Ο響應個別回授信號將可程式電源程式化，以補償在 自發光元件所輸出之光之變化。 9 ·如申凊專利範圍第8項之方法，其中顯示器包括一控制 咨，茲控制器有一查找表，供接收裝置獨立碼值，及產 生裝置相依碼值，並進一步包含藉改變查找表，以校準 控制器之步驟。 10· _如^申請專利範圍第8項之方法，其中顯示器為一彩色顯 不為，其包括一控制器，該控制器有一查找表，供接收 裝置獨立碼值，及產生裝置相依碼值，並進一步包含藉 改變查找表，以校準顯示器之彩色平衡之步驟。 11· 一種主動矩陣式OLED平面彩色顯示器，包含 a) —基板； b) 形成於該基板上之許多發光元件及相關之控制電路； c) 一可程式電源，連接至該控制電路； d) —感測器，供感測一個或多個發光元件之光輸出，以 產生一回授信號；以及 e) -顯示器㈣器’響應該回授信號’供將該可程式 程式化，以補償在自發光元件輸出之光之變化。 书/‘、 12. 如申請專利範圍第η項之顯示器，其中該 形成於該基板上。 原係 13. 如申請專利範圍第"項《顯示器，丨中該顯 本紙張尺度適用中國國家標準(CNS) Α4規格(210X297公釐) ___________
    8 8 8 8 A B c D 1303796 六、申請專利範圍 色顯示器，其具有發光元件供發出不同彩色，及進一步 包含一分離感測器供顯示器發出每一彩色。 14.如申請專利範圍第1 3項之顯示器，進一步包含分離可程 式化電源供每一平面彩色顯示器之彩色。 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐）
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