JP5159701B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP5159701B2 JP5159701B2 JP2009121555A JP2009121555A JP5159701B2 JP 5159701 B2 JP5159701 B2 JP 5159701B2 JP 2009121555 A JP2009121555 A JP 2009121555A JP 2009121555 A JP2009121555 A JP 2009121555A JP 5159701 B2 JP5159701 B2 JP 5159701B2
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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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- 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
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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]
- G09G3/3275—Details of drivers for data electrodes
- G09G3/3283—Details of drivers for data electrodes in which the data driver supplies a variable data current for setting the current through, or the voltage across, the light-emitting elements
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- G09G2300/00—Aspects of the constitution of display devices
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- G09G2300/0809—Several active elements per pixel in active matrix panels
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- G—PHYSICS
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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
- 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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- 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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- G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
- G09G2300/0861—Several 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
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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
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0243—Details of the generation of driving signals
- G09G2310/0251—Precharge or discharge of pixel before applying new pixel voltage
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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
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/027—Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
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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
- G09G3/2007—Display of intermediate tones
- G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
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- 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
- G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
- G09G3/2022—Display of intermediate tones by time modulation using two or more time intervals using sub-frames
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- Control Of El Displays (AREA)
- Electroluminescent Light Sources (AREA)
Description
前記第1電流源回路は第1ラッチに配置され、前記第2電流源回路は第2ラッチに配置され、
前記第1電流源回路は、前記シフトレジスタから供給されるサンプリングパルスに従って、前記ビデオ信号用定電流源から供給された電流を電圧に変換する容量手段と、前記変換された電圧に応じた電流を供給する供給手段を有し、
前記第2電流源回路は、ラッチパルスに従って、前記第1ラッチから供給された電流を電圧に変換する容量手段と、前記変換された電圧に応じた電流を供給する供給手段を有することを特徴とする。
前記第1電流源回路は第1ラッチに配置され、前記第2電流源回路は第2ラッチに配置され、
前記第1電流源回路は、前記シフトレジスタから供給されるサンプリングパルスに従って、前記n個のビデオ信号用定電流源の各々から供給される電流を加算した電流を電圧に変換する容量手段と、前記変換された電圧に応じた電流を供給する供給手段を有し、
前記第2電流源回路は、ラッチパルスに従って、前記第1ラッチから供給された電流を電圧に変換する容量手段と、前記変換された電圧に応じた電流を供給する供給手段を有し、
前記n個のビデオ信号用定電流源から供給される電流値は、20:21:・・・:2nに設定されることを特徴とする。
前記2×n個の電流源回路のうち、n個の電流源回路が第1及び第2ラッチの各々に配置され、
前記第1ラッチに配置されたn個の電流源回路は、前記シフトレジスタから供給されるサンプリングパルスに従って、前記n個のビデオ信号用定電流源の各々から供給された電流を電圧に変換する容量手段と、前記変換された電圧に応じた電流を供給する供給手段を有し、
前記第2ラッチに配置されたn個の電流源回路は、ラッチパルスに従って、前記第1ラッチから供給される電流を加算した電流を電圧に変換する容量手段と、前記変換された電圧に応じた電流を供給する供給手段を有し、
前記複数の信号線には、前記第2ラッチに配置されたn個の電流源回路の各々から供給される電流を加算した電流が供給され、
前記n個のビデオ信号用定電流源から供給される電流値は、20:21:・・・:2nに設定されることを特徴とする。
前記(n+m)個の電流源回路のうち、n個の電流源回路が第1ラッチに配置され、m個の電流源回路が第2ラッチに配置され、
前記第1ラッチに配置されたn個の電流源回路は、前記シフトレジスタから供給されるサンプリングパルスに従って、前記n個のビデオ信号用定電流源の各々から供給された電流を電圧に変換する容量手段と、前記変換された電圧に応じた電流を供給する供給手段を有し、
前記第2ラッチに配置されたm個の電流源回路は、ラッチパルスに従って、前記第1ラッチに配置されたn個の電流源回路の各々から供給される電流を加算した電流を電圧に変換する容量手段と、前記変換された電圧に応じた電流を供給する供給手段を有し、
前記n個のビデオ信号用定電流源から供給される電流値は、20:21:・・・:2nに設定されることを特徴とする。
本発明は上記のような電流源回路を有する信号線駆動回路を提供する。さらに本発明は、TFTの特性バラツキの影響を抑制した回路構成の画素を用いることにより、画素及び駆動回路の両方を構成するTFTの特性バラツキの影響を抑制し、また所望の信号電流Idataを発光素子に供給することができる発光装置を提供する。
本実施の形態では、本発明の信号線駆動回路に具備される電流源回路420の回路構成とその動作の例について説明する。
本実施の形態では、本発明の信号線駆動回路が具備される発光装置の構成について図15を用いて説明する。
本実施の形態では、図15(A)に示した信号線駆動回路403の構成とその動作について説明する。本実施の形態では、アナログ階調表示又は1ビットのデジタル階調表示を行う場合に用いる信号線駆動回路403について説明する。
本実施の形態では、図15(A)に示した信号線駆動回路403の詳細な構成とその動作について説明するが、本実施の形態では、2ビットのデジタル階調表示を行う場合に用いる信号線駆動回路403について説明する。
図6(A)のような回路では、1本の信号線ごと(各列)に2つの電流源回路を設けて、一方の電流源回路に信号を設定する動作(設定動作)を行い、他方の電流源回路を用いて画素にIdataを入力する動作(入力動作)を行うことが好ましいことは上述した。これは、設定動作と入力動作とを同時に行うことが出来るためである。そこで本実施の形態では、本発明の信号線駆動回路に具備される図2に示した電流源回路420の回路構成の例について図8を用いて説明する。
図2〜図5において示したビデオ信号用定電流源109は、基板上に信号線駆動回路と一体形成してもよいし、ビデオ信号用電流109として、基板の外部からIC等を用いて一定の電流を入力してもよい。そして基板上に一体形成する場合には、図6〜8、図29、図30、図32などに示した電流源回路のいずれを用いて形成してもよい。本実施の形態では、3ビット用のビデオ信号用電流源109を図6(C)のようなカレントミラー回路の電流源回路で構成する場合について図23〜図25を用いて説明する。
本発明の実施の形態について、図11を用いて説明する。図11(A)において、画素部の上方に信号線駆動回路、下方に定電流回路を配置し、前記信号線駆動回路に電流源A、定電流回路に電流源Bを配置する。電流源A、Bから供給される電流をIA、IBとし、画素に供給される信号電流をIdataとすると、IA=IB+Idataが成立する。そして、画素に信号電流を書き込む際には、電流源A、Bの両者から電流を供給するように設定する。このとき、IA、IBを大きくすると、画素に対する信号電流の書き込み速度を早くすることができる。
Claims (3)
- 第1の電流源回路と、第2の電流源回路と、を有し、
前記第1の電流源回路は、第1のトランジスタと、第2のトランジスタと、を有し、
第1のパルスに応じて、第1の電流を前記第1のトランジスタのドレイン電流としたときの前記第1のトランジスタのゲート電圧を第1の電圧として保持し、前記第2のトランジスタのゲート電圧が前記第1の電圧であるときの前記第2のトランジスタのドレイン電流を第2の電流として出力し、
前記第2の電流源回路は、第3のトランジスタを有し、
前記第1のパルスとは異なる第2のパルスに応じて、前記第2の電流を前記第3のトランジスタのドレイン電流としたときの前記第3のトランジスタのゲート電圧を第2の電圧として保持し、前記第3のトランジスタのゲート電圧が前記第2の電圧であるときの前記第3のトランジスタのドレイン電流を第3の電流として出力し、
前記第3の電流は、配線を介して画素に入力され、
前記第1のトランジスタのゲート幅(W1)とゲート長(L1)の比(W1/L1)は、前記第2のトランジスタのゲート幅(W2)とゲート長(L2)の比(W2/L2)よりも大きいことを特徴とする半導体装置。 - 第1の電流源回路と、第2の電流源回路と、を有し、
前記第1の電流源回路は、第1のトランジスタを有し、
第1のパルスに応じて、第1の電流を前記第1のトランジスタのドレイン電流としたときの前記第1のトランジスタのゲート電圧を第1の電圧として保持し、前記第1のトランジスタのゲート電圧が前記第1の電圧であるときの前記第1のトランジスタのドレイン電流を第2の電流として出力し、
前記第2の電流源回路は、第2のトランジスタと、第3のトランジスタと、を有し、
前記第1のパルスとは異なる第2のパルスに応じて、前記第2の電流を前記第2のトランジスタのドレイン電流としたときの前記第2のトランジスタのゲート電圧を第2の電圧として保持し、前記第3のトランジスタのゲート電圧が前記第2の電圧であるときの前記第3のトランジスタのドレイン電流を第3の電流として出力し、
前記第3の電流は、配線を介して画素に入力され、
前記第2のトランジスタのゲート幅(W2)とゲート長(L2)の比(W2/L2)は、前記第3のトランジスタのゲート幅(W3)とゲート長(L3)の比(W3/L3)よりも大きいことを特徴とする半導体装置。 - 第1の電流源回路と、第2の電流源回路と、を有し、
前記第1の電流源回路は、第1のトランジスタと、第2のトランジスタと、を有し、
第1のパルスに応じて、第1の電流を前記第1のトランジスタのドレイン電流としたときの前記第1のトランジスタのゲート電圧を第1の電圧として保持し、前記第2のトランジスタのゲート電圧が前記第1の電圧であるときの前記第2のトランジスタのドレイン電流を第2の電流として出力し、
前記第2の電流源回路は、第3のトランジスタと、第4のトランジスタと、を有し、
前記第1のパルスとは異なる第2のパルスに応じて、前記第2の電流を前記第3のトランジスタのドレイン電流としたときの前記第3のトランジスタのゲート電圧を第2の電圧として保持し、前記第4のトランジスタのゲート電圧が前記第2の電圧であるときの前記第4のトランジスタのドレイン電流を第3の電流として出力し、
前記第3の電流は、配線を介して画素に入力され、
前記第1のトランジスタのゲート幅(W1)とゲート長(L1)の比(W1/L1)は、前記第2のトランジスタのゲート幅(W2)とゲート長(L2)の比(W2/L2)よりも大きく、
前記第3のトランジスタのゲート幅(W3)とゲート長(L3)の比(W3/L3)は、前記第4のトランジスタのゲート幅(W4)とゲート長(L4)の比(W4/L4)よりも大きいことを特徴とする半導体装置。
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Also Published As
Publication number | Publication date |
---|---|
US8593377B2 (en) | 2013-11-26 |
TW200300247A (en) | 2003-05-16 |
US20110205216A1 (en) | 2011-08-25 |
JP5977384B2 (ja) | 2016-08-24 |
EP1463026A4 (en) | 2009-07-22 |
JPWO2003038796A1 (ja) | 2005-02-24 |
CN1608280A (zh) | 2005-04-20 |
US7791566B2 (en) | 2010-09-07 |
TWI256607B (en) | 2006-06-11 |
JP5448276B2 (ja) | 2014-03-19 |
KR20050042041A (ko) | 2005-05-04 |
KR100905270B1 (ko) | 2009-06-30 |
US20110012645A1 (en) | 2011-01-20 |
US20130032867A1 (en) | 2013-02-07 |
WO2003038796B1 (fr) | 2003-09-25 |
US7940235B2 (en) | 2011-05-10 |
JP2012150485A (ja) | 2012-08-09 |
WO2003038796A1 (fr) | 2003-05-08 |
US8294640B2 (en) | 2012-10-23 |
EP1463026B1 (en) | 2011-10-05 |
US7193619B2 (en) | 2007-03-20 |
CN100385487C (zh) | 2008-04-30 |
JP2013238872A (ja) | 2013-11-28 |
JP2009181143A (ja) | 2009-08-13 |
JP2015108844A (ja) | 2015-06-11 |
EP1463026A1 (en) | 2004-09-29 |
US20060103610A1 (en) | 2006-05-18 |
US20040085029A1 (en) | 2004-05-06 |
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