TWI228012B - Method for obtaining even luminance of organic light-emitting diode (OLED) display - Google Patents

Method for obtaining even luminance of organic light-emitting diode (OLED) display Download PDF

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TWI228012B
TWI228012B TW090133353A TW90133353A TWI228012B TW I228012 B TWI228012 B TW I228012B TW 090133353 A TW090133353 A TW 090133353A TW 90133353 A TW90133353 A TW 90133353A TW I228012 B TWI228012 B TW I228012B
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Taiwan
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time
area
pattern
emitting diode
organic light
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TW090133353A
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English (en)
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Yan-Hua Chen
Jr-Jung Jian
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Wintek Corp
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Priority to TW090133353A priority Critical patent/TWI228012B/zh
Priority to JP2002368156A priority patent/JP2003223143A/ja
Priority to US10/330,294 priority patent/US6937214B2/en
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Publication of TWI228012B publication Critical patent/TWI228012B/zh

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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
    • 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]
    • 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
    • G09G3/04—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions
    • G09G3/06—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources
    • G09G3/12—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources using electroluminescent elements
    • G09G3/14—Semiconductor devices, e.g. diodes
    • 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]
    • G09G3/3216—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 a passive matrix
    • 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
    • G09G2320/0233—Improving the luminance or brightness uniformity across the 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
    • 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
    • G09G3/2007—Display of intermediate tones
    • G09G3/2014—Display of intermediate tones by modulation of the duration of a single pulse during which the logic level remains constant
    • 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]

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  • Engineering & Computer Science (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

1228012
發明領域 本电明係關於有機發光二極體顯示器（0rganie u
Enutting Diode，〇LED )的顯示技術，特別係關於控 0LED驅動晶片（〇LED Driver I〇的驅動訊號以使顯工 之顯示内容具有均勻亮度的方法。 ’〃、為 發明背景 一目前有機發光二極體顯示器的使用範圍包括：車用 顯不器、遊戲機、PDA、行動電話，一般顯示内容包含圖 形及ί像素組成的文字。圖一Α顯示習知有機發光二極^ 顯示為’包含被動式（passive)及主動式（active )有機發 光二極體顯示器之驅動電路示意圖。該驅動電路使用驅動 晶片1 〇以驅動顯示器面板（pane 1 )11内的多個圖形12、13 、1 4、1 5、1 6及複數個像素（p i xe 1 ) 1 7，驅動晶片1 〇藉由 資料線1 0 〇輸出電流訊號，以及藉由掃描線丨〇 1輸出掃描訊 號’依序提供圖形及各像素定電流驅動。由於圖一 A之驅 動電路係採定電流驅動，其顯示結果會因圖形的面積較大 ’而呈現亮度較暗的情形；像素的面積較小，而呈現亮度 較亮的情形，以致於整個顯示晝面有亮度不均勻的現象。 圖一 B顯示另一習知有機發光二極體顯示器之驅動電路 示意圖。圖一 B係圖一 A之改良電路，其利用另一顆驅動晶 片1 8僅提供高電流給多個圖形1 2、1 3、1 4、1 5、1 6，使得 改善圖形之較大顯示面積所造成亮度微弱的缺點。然而，
1228012 五、發明說明（2) 圖二B也相對地增加一顆驅動晶片的成本，以及使用更多 的訊號線，徒增更大的面板佈線空間。 發明概要 本發明之目的’主要係解決傳統〇LED顯示器之亮度不 均勻的缺點，同時具有降低設計成本，及減少面板佈線空 間等優點。 達到上 之顯示 為 顯示器 具有複數個圖 器具有 素，該 驅動 位時間 該每一 該每一 素之面 面積倍 掃描訊 乘以該 方法包 為該驅 個圖形 個圖形 積的比 數，由 號，其 最大面 每一個圖形的 該第 時供應 形供應 時間為該單位 第一 述目的，本發明提供一種 内容具有均勻亮度的方法 形及複數個像素，且該有 日日片，用以點党該複數個 含下列的步驟：（A )設定 動晶片掃描該每一個像素 的面積倍數，且取得一最 的面積倍數係該每一個圖 值；（C)依據經該步驟（b ) 該驅動晶片對該每一個圖 中該第一掃描訊號之供應 積倍數；（D )依據經該步肩 面積倍數，於該驅動晶片 掃描訊號時，該驅動晶片 電流訊號’其中該每一第 時間乘以該每一個圖形的 使有機發光二極體 ’其中該顯示内容 機發光二極體顯示 圖形及該複數個像 一單位時間，該單 ;(B)計算 的時間 大面積 形之面 計算得 形同時 時間為 ,(B)計 對該每 分別對 一電流 面積倍 倍數，其中 積與一個像 到的該最大 供應一第一 該單位時間 算得到的該 一個圖形同 该每一個圖 訊號之供應 數0
第6頁 1228012
五、發明說明（3) 其中上述方法進一步包含：該驅動晶片上 素供應一第二掃描訊號，其中該第二掃描气卞"亥每一個像 為該步驟（A )之該單位時間；於該驅動晶片^之供應時間 素供應該第二掃描訊號時，該驅動晶片分別5 4，一個像 形供應一第二電流訊號，其中該每一第二電=°亥每一個圖 時間為該步驟（A)之該單位時間。 “泰m號之供應 為使熟悉該項技藝人士瞭解本發明之θ ^ w ^曰的、 效，茲藉由下述具體實施例，並配合所附之。、特徵及功 明詳加說明如后： 圖式’對本發 發明詳細說明 本發明之原理，在於控制圖一Α之驅動曰 訊號及資料線訊號，依據顯示面積的大小=片的掃描線 時間的長短，通常顯示面積越大，則訊號供廄、1訊號供應 顯二面積越小，則訊號供應時間越短，1用、=N間越長， 顯示面積所需的能量較多，故供應較長時間：=較大的 最後使得各Ϊ :需的能莖；：’故供應較短時間的訊號， 顯示面積呈：示面 能量密冑’而達到各個 見岣勻亮度的效果。 間， 圖二係 該單位 本發明方法之流程圖。步驟20係設定—單位奸 卞間為該驅動晶片掃描該每一個像素的時門'
1228012 五、發明說明（4) 步驟22係計算該每-個圖形的面積倍數，且取得一最大面 積倍數，纟中：母-個圖形的面積倍數係該每一個圖形之 =與-個像=面積的比i ;步驟24係依據經該步驟22 言十鼻得到的該敢大面積倍數，由該 形同時供應一第一掃描訊號，豆中兮钕,T ^ 口 時間為該單位時間乘以該最大面積；：：：掃描訊號之供應 係依據經該步麟計算得到的該=週㈣；步驟26 ，該驅動晶片分別對該每—個2:以該第第-rrr 其中該每一第-電流訊號之供-電流訊號， 每-個圖形的面積倍數。本發：為3亥早位時間乘以該 :該驅動晶片對該每-個料=法，一 t包含τ列步驟 該第二掃描訊號之供應時弟二！描訊號’其中 驅動晶片對該每一個像素供應^第之忒早位時間，於該 晶片分別對該每-個圖形^掃描訊號時，該驅動 -第二電流訊號之供應時：電流訊號，其中該每 ^吋間為步驟2〇之該單位時間。 上述的步驟2 4指，出，由於 故掃描時間應取使最大面積的 所需的掃描時間，才能使最大 1亥效果所需的能量。 多個圖形共用一條掃描線， 圖形能夠呈現均勻亮度效果 面積的圖形能完整得到呈現 係依艨不贫明方法 a〜 肢頁犯1夕丨』，係應用 之驅動晶片的各驅動訊號波形圖。圖三係依據圖
1228012
少1 2的面積倍數為9，圖形丨3的面積 2，圖形1 4的面積仵齡盔q R 領1口数為 _ σ 貝1口數為3，驅動晶片1 0供應定電流I。m ilr7 + & 了間為t，亦即驅動晶片10掃描該每一個# 素17的％間為t ;掃描線Ci_的訊號供應時間為9卜 = =(:圖形12)所需的掃描時間為9t;陰以 (ix3t)。 、里為(ix⑴，圖形Η得到的能量為 、1 4及像素1 7的能量密 所以皆具有相同的發光 現均勻亮度的效果。 經簡單計算，可得圖形丨2、；ι 3 度（power density)皆為（！ xt)， 強度，故本發明可以使顯示内容呈 2明的特點係使用一顆驅動曰曰小卻能使顯示内容 丄㈤時也節省另一顆驅動晶片的成本 佈rc ，用較少的訊號線，相對地節省面板的 本、重量、及尺寸上的優勢。 有成 雖然本發明已以一較佳 以限定本發明，任何熟悉此 ，和範圍内，當可作各種之 達範圍當視後附之申請專利 貝知例揭露如上，然其並非用 技藝者，在不脫離本發明之精 ^動與潤飾，因此本發明之保 範圍所界定者為準。
第9頁 1228012 圖式簡單說明 圖式簡單說明 圖一 A顯示習知有機發光二極體顯示器之驅動電路示 意圖。 圖一 B顯示另一習知有機發光二極體顯示器之驅動電 路不意圖。 圖二係本發明方法之流程圖。 圖三係依據本發明方法之一具體實施例，係應用於圖 一 A之驅動晶片的各驅動訊號波形圖。 圖號編號說明 10 驅動晶片 100 資料線 101 掃描線 12 、13 、14 、15 、16 圖形 17 像素 18 驅動晶片
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Claims (1)

1228012 六、申請專利範圍 申請專利範圍 一種使有機發光二極體顯示器之顯示内容呈有玉勺 度的方法’其中該顯示内容具有複數個圖形及複=數1個 像素（p i xe 1)，且該有機發光二極體顯示器具有一驅動 晶片，用以點亮該複數個圖形及該複數個像素，該方 法包含下列的步驟： 間間 時時 位的 單素 一 像 定個 設\ 每 亥 =口 描 掃 片 晶 區 焉 亥 為 間 時 位 單 該 (B)計算該每/個圖形的面積倍數，且取得一最大面積倍 數，其中該每一個圖形的面積倍數係該每一個圖形之 面積與一個像素之面積的比值； (C )依據經該步驟（B )計算得到的該最大面積倍數’由該 驅動晶片對該每一個圖形同時供應一第一掃描訊號， 其中該第一掃描訊號之供應時間為該單位時間乘以該 最大面積倍數； (D)依據經該步驟（B)計算得到的該每一個圖形的面積倍 數，於該驅動晶片對該每一個圖形同時供應該第一掃 描訊號時，該驅動晶片分別對該每一個圖形供應一第 一電流訊號，其中該每一第一電流訊號之供應時間為
1228012 六、申請專利範圍 該單位時間乘以該每一個圖形的面積倍數。 2、 如申請專利範圍第1項所述的方法，進一步包含： •該驅動晶片對該每一個像素供應一第二掃描訊號，其 中該第二掃描訊號之供應時間為該步驟（A)之該早位 時間； •於該驅動晶片對該每一個像素供應該第二掃描訊號時 ，該驅動晶片分別對該每一個圖形供應一第二電流訊 號，其中該每一第二電流訊號之供應時間為該步驟（A )之該單位時間。 3、 如申請專利範圍第1項所述的方法，其中該有機發光二 極體顯示器係一被動式（p a s s i v e )有機發光二極體顯示 器或一主動式（active)有機發光二極體顯示器。
第12頁
TW090133353A 2001-12-31 2001-12-31 Method for obtaining even luminance of organic light-emitting diode (OLED) display TWI228012B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
TW090133353A TWI228012B (en) 2001-12-31 2001-12-31 Method for obtaining even luminance of organic light-emitting diode (OLED) display
JP2002368156A JP2003223143A (ja) 2001-12-31 2002-12-19 有機発光ダイオードディスプレイの輝度均一化方法
US10/330,294 US6937214B2 (en) 2001-12-31 2002-12-30 Method for generating uniform luminosity for displaying contents of organic light emitting diode

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JP5610026B2 (ja) * 2013-04-22 2014-10-22 株式会社デンソー 有機ｅｌ表示装置およびその駆動方法
JP2015184287A (ja) * 2014-03-20 2015-10-22 パイオニア株式会社 発光装置
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