JP7098027B2 - 電界発光表示装置 - Google Patents
電界発光表示装置 Download PDFInfo
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- JP7098027B2 JP7098027B2 JP2021100851A JP2021100851A JP7098027B2 JP 7098027 B2 JP7098027 B2 JP 7098027B2 JP 2021100851 A JP2021100851 A JP 2021100851A JP 2021100851 A JP2021100851 A JP 2021100851A JP 7098027 B2 JP7098027 B2 JP 7098027B2
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- 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
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- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
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- 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
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- 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]
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
- H10K59/1213—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being TFTs
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
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- 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
- G09G2300/0852—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor being a dynamic memory with more than one capacitor
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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
- 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
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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- G—PHYSICS
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
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- G—PHYSICS
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- 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
- G09G3/3241—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 the current through the light-emitting element being set using a data current provided by the data driver, e.g. by using a two-transistor current mirror
- G09G3/325—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 the current through the light-emitting element being set using a data current provided by the data driver, e.g. by using a two-transistor current mirror the data current flowing through the driving transistor during a setting phase, e.g. by using a switch for connecting the driving transistor to the data driver
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- Geometry (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
ゲートドライバー13は、ゲートタイミング制御信号GDCに応じて、オフレベルとオンレベルとの間でスイングするパルスタイプスキャン信号SC1~SCnを生成し、前記パルスタイプスキャン信号SC1~SCnの出力タイミングをデータ電圧の供給タイミングに対応させてもよい。言い換えれば、ゲートドライバー13は、プログラミング期間内でオンレベルのスキャン信号SC1~SCnを順次ゲートライン151~15nに供給し、初期化期間及び発光期間でオフレベルのスキャン信号SC1~SCnをゲートライン151~15nに供給してもよい。 ゲートドライバー13は、ゲートタイミング制御信号GDCに応じて初期化期間内でロー電圧レベルとハイ電圧レベルとの間でトグルされる第1初期化電圧Vinitを生成して初期化電圧供給ラインILに供給する。そして、ゲートドライバー13は、プログラミング期間及び発光期間でロー電圧レベルの第2初期化電圧Vinitを生成して初期化電圧供給ラインILに供給する。初期化電圧供給ラインILは全てのピクセルPIXに共通して連結されているから、初期化期間内でハイ電圧レベルの第1初期化電圧VinitによってピクセルPIXの駆動素子が同時にターンオンされてもよい。
Ioled=k[α(Vref-Vdata)]2
11 タイミングコントローラー
12 データドライバー
13 ゲートドライバー
14 データライン
15 ゲートライン
IL 初期化電圧供給ライン
EVL1、EVL2 第1電源ライン、第2電源ライン
Claims (14)
- 複数のピクセル、第1方向に、隣接したピクセルに共通して連結されたゲートライン、前記第1方向と交差する第2方向に、隣接したピクセルに共通して連結されたデータライン、全ての前記ピクセルに共通して連結された第1電源ライン、第2電源ライン、及び初期化電圧供給ラインを含むピクセルアレイと、
前記ピクセルアレイに連結されたパネル駆動回路とを含み、
前記ピクセルのそれぞれは、
第1ノードに連結されたゲート電極と、前記第1電源ラインを介して高電位駆動電源に連結されたソース電極と、第2ノードに連結されたドレイン電極と、を有する駆動素子と、
前記ゲートラインに連結されたゲート電極と、ソース電極と、ドレイン電極を有し、ソース電極及びドレイン電極のいずれか一つが前記第1ノードに連結され、残りの一つが前記第2ノードに連結されたスイッチング素子と、
前記データラインと前記第1ノードとの間に連結された第1キャパシタと、
前記初期化電圧供給ラインと前記第1ノードとの間に連結された第2キャパシタと、
前記第2ノードに連結されたアノード電極と、前記第2電源ラインを介して低電位駆動電源に連結されたカソード電極と、を有する発光素子とを含み、
前記高電位駆動電源は第1電圧レベルで一定であり、
前記低電位駆動電源は第2電圧レベルと第3電圧レベルとの間でスイングし、
前記第2電圧レベルは前記第1電圧レベルより低く前記第3電圧レベルより高い、
電界発光表示装置。 - 前記駆動素子と前記スイッチング素子のうちの1つはPチャネルトランジスタから具現される、請求項1に記載の電界発光表示装置。
- 前記第1キャパシタの容量より前記第2キャパシタの容量が大きい、請求項1に記載の電界発光表示装置。
- 1フレーム期間は、初期化期間、前記初期化期間に引き続くプログラミング期間、及び前記プログラミング期間に引き続く発光期間を含み、
前記初期化期間及び前記プログラミング期間で前記複数のピクセルの発光素子が前記第2電圧レベルの低電位駆動電源に基づいて同時にターンオフされ、
前記発光期間で前記複数のピクセルの発光素子が前記第3電圧レベルの低電位駆動電源に基づいて同時にターンオンされる、請求項1に記載の電界発光表示装置。 - 前記パネル駆動回路に属する電源回路は、
前記1フレーム期間の間に前記第1電圧レベルの高電位駆動電源を前記第1電源ラインに供給し、
前記初期化期間及び前記プログラミング期間で前記第2電圧レベルの低電位駆動電源を前記第2電源ラインに供給し、
前記発光期間で前記第3電圧レベルの低電位駆動電源を前記第2電源ラインに供給する、請求項4に記載の電界発光表示装置。 - 前記パネル駆動回路に属するデータドライバーは、
前記初期化期間及び前記発光期間で基準電圧を前記データラインに供給し、
前記プログラミング期間で前記基準電圧と違うデータ電圧を前記データラインに供給する、請求項4に記載の電界発光表示装置。 - 前記パネル駆動回路に属するゲートドライバーは、
前記初期化期間内でロー電圧レベルとハイ電圧レベルとの間でトグルされる第1初期化電圧を生成して第1初期化電圧供給ラインに供給し、
前記プログラミング期間及び前記発光期間で前記ロー電圧レベルの第2初期化電圧を生成して第2初期化電圧供給ラインに供給する、請求項6に記載の電界発光表示装置。 - 前記パネル駆動回路に属するゲートドライバーは、
オフレベルとオンレベルとの間でスイングするパルスタイプスキャン信号を生成し、
前記プログラミング期間内で前記オンレベルのパルスタイプスキャン信号を前記ゲートラインに供給し、
前記初期化期間及び前記発光期間で前記オフレベルのパルスタイプスキャン信号を前記ゲートラインに供給する、請求項7に記載の電界発光表示装置。 - 前記パルスタイプスキャン信号の供給タイミングは前記データ電圧の供給タイミングに対応する、請求項8に記載の電界発光表示装置。
- 前記初期化期間内で前記トグルされる第1初期化電圧に基づいて前記駆動素子がターンオン条件を満たす、請求項9に記載の電界発光表示装置。
- 前記プログラミング期間内で前記駆動素子及び前記スイッチング素子のターンオンによって“EVDD-Vth”が前記第1ノードに貯蔵され、前記“EVDD”は、前記高電位駆動電源の前記第1電圧レベルの電圧であり、前記“Vth”は前記駆動素子の閾値電圧である、請求項10に記載の電界発光表示装置。
- 前記発光期間内で前記発光素子に流れる発光電流Ioledは前記駆動素子の閾値電圧に無関係な下記の数1によって決定され、
[数1]
Ioled=k[α(Vref-Vdata)]2
前記数1で、前記kは前記駆動素子の電子移動度、寄生容量、及びチャネル容量によって決定される定数値であり、前記αはC1/(C1+C2)であり、前記C1は前記第1キャパシタの容量であり、前記C2は前記第2キャパシタの容量であり、前記Vrefは前記基準電圧であり、前記Vdataは前記データ電圧である、請求項11に記載の電界発光表示装置。 - 縦軸が電流を示し横軸が電圧を示す2次元グラフ上で、前記発光素子に流れる発光電流は、前記駆動素子の動作を示す第1電流-電圧曲線と、前記発光素子の動作を示す第2電流-電圧曲線とが互いに交差する交差点によって決定され、
温度及び劣化によって前記発光素子の閾値電圧が変わっても前記第1電流-電圧曲線は変わらずに既設定の形態を維持する、請求項1に記載の電界発光表示装置。 - 前記駆動素子の前記ゲート電極と、前記第1キャパシタの一の電極と、前記スイッチング素子の前記ソース電極及び前記ドレイン電極のいずれか一つと、前記第2キャパシタの一の電極の各々は、前記第1ノードに直接接続している、請求項1に記載の電界発光表示装置。
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