JP4907908B2 - 駆動回路及び表示装置 - Google Patents
駆動回路及び表示装置 Download PDFInfo
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- JP4907908B2 JP4907908B2 JP2005190230A JP2005190230A JP4907908B2 JP 4907908 B2 JP4907908 B2 JP 4907908B2 JP 2005190230 A JP2005190230 A JP 2005190230A JP 2005190230 A JP2005190230 A JP 2005190230A JP 4907908 B2 JP4907908 B2 JP 4907908B2
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- Prior art keywords
- circuit
- nonvolatile memory
- display device
- level shifter
- 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
- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3696—Generation of voltages supplied to electrode drivers
-
- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3674—Details of drivers for scan electrodes
-
- 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
- G09G2310/0289—Details of voltage level shifters arranged for use in a driving circuit
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (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)
- Liquid Crystal Display Device Control (AREA)
- Liquid Crystal (AREA)
Description
あるいは、ゲートドライバ回路105の駆動に必要な入力信号のビット数nが、不揮発性メモリ回路109の駆動に必要な入力信号のビット数mよりも小さい場合、m+1ビット分のレベルシフタを用意すればよい。図1においては、n>mの場合を示しており、n<mの場合にはコントローラ回路102から供給される制御信号は、mビットの制御信号<CNT(m:1)>となる。
本発明の実施の形態2について、図5を参照して説明する。図5は、本実施の形態にかかる液晶表示装置の構成を示すブロック図である。本実施の形態において、実施の形態1と異なる点は、駆動回路101内に昇圧回路110を備える点である。なお、図5において、図1と同一の構成要素には同一の符号を付し、説明を省略する。
101 駆動回路
102 コントロール回路
103 レベルシフタ回路
104 ゲートドライバ用デコーダ回路
105 ゲートドライバ回路
106 セレクタ用レベルシフタ回路
107 不揮発性メモリ用デコーダ回路
108 不揮発性メモリ駆動回路
109 不揮発性メモリ
110 昇圧回路
111 レベルシフタブロック
112 デコーダ回路ブロック
113 ドライバブロック
Claims (8)
- 第1電圧で駆動される、表示パネルを駆動する表示装置駆動回路と、
前記第1電圧と異なる第2電圧で駆動される、不揮発性メモリを駆動する不揮発性メモリ駆動回路と、
前記表示装置駆動回路と前記不揮発性メモリ駆動回路のいずれかを選択的に動作状態とする制御回路と、
前記表示装置駆動回路と前記不揮発性メモリに共有されるレベルシフタ回路であって、前記表示装置駆動回路が動作状態の場合に、前記第1電圧が当該レベルシフタ回路の電源として供給され、入力された制御信号を前記表示装置駆動回路の電源レベルに変換して前記表示装置駆動回路に出力し、前記不揮発性メモリ駆動回路が動作状態の場合に、前記第2電圧が当該レベルシフタ回路の電源として供給され、入力された制御信号を前記不揮発性メモリ駆動回路の電源レベルに変換して前記不揮発性メモリ駆動回路に出力するレベルシフタ回路と、
を備える駆動回路。 - 前記表示装置駆動回路は、動作状態の場合には、前記レベルシフタ回路から前記表示装置駆動回路に出力される制御信号に基づき、前記表示パネルのゲート線を選択する選択電圧を出力し、非動作状態の場合には、非選択電圧を出力する、請求項1に記載の駆動回路。
- 前記レベルシフタ回路からの出力信号線は、前記不揮発性メモリ駆動回路と前記表示装置駆動回路との間で共用され、
前記出力信号線に接続され、前記表示装置駆動回路に対応して設けられた表示装置用デコーダ回路と、前記不揮発性メモリ駆動回路に対応して設けられた不揮発性メモリ用デコーダ回路をさらに備え、
前記表示装置用デコーダ回路は、前記表示装置駆動回路への前記レベルシフタ回路からの制御信号の入力/非入力を制御し、
前記不揮発性メモリ用デコーダ回路は、前記不揮発性メモリ駆動回路への前記レベルシフタ回路からの制御信号の入力/非入力を制御する、請求項1または2に記載の駆動回路。 - 前記レベルシフタ回路に対し、前記表示装置駆動回路が動作状態の場合に前記第1電圧を供給し、前記不揮発性メモリ駆動回路が動作状態の場合に前記第2電圧を供給する昇圧回路をさらに備える、請求項1〜3のいずれかに記載の駆動回路。
- 表示パネルと、
表示設定データを記憶する不揮発性メモリと、
第1電圧で駆動される、前記表示パネルを駆動する表示装置駆動回路と、
前記第1電圧と異なる第2電圧で駆動される、前記不揮発性メモリを駆動する不揮発性メモリ駆動回路と、
前記表示装置駆動回路と前記不揮発性メモリ駆動回路のいずれかを選択的に動作状態とする制御回路と、
前記表示装置駆動回路と前記不揮発性メモリに共有されるレベルシフタ回路であって、前記表示装置駆動回路が動作状態の場合に、前記第1電圧が当該レベルシフタ回路の電源として供給され、入力された制御信号を前記表示装置駆動回路の電源レベルに変換して前記表示装置駆動回路に出力し、前記不揮発性メモリ駆動回路が動作状態の場合に、前記第2電圧が当該レベルシフタ回路の電源として供給され、入力された制御信号を前記不揮発性メモリ駆動回路の電源レベルに変換して前記不揮発性メモリ駆動回路に出力するレベルシフタ回路と、
を備える表示装置。 - 第1電圧で駆動される、表示パネルを駆動する表示装置駆動回路と、
前記第1電圧と異なる第2電圧で駆動される、不揮発性メモリを駆動する不揮発性メモリ駆動回路と、
前記表示装置駆動回路と前記不揮発性メモリに共有されるレベルシフタ回路であって、当該レベルシフタ回路の電源として前記第1電圧又は前記第2電圧が供給され、入力された制御信号を、前記表示装置駆動回路の電源レベル又は前記不揮発性メモリ駆動回路の電源レベルに変換したレベルシフト信号を出力するレベルシフタ回路と、
前記レベルシフト信号を入力する回路として、変換された当該レベルシフト信号の前記電源レベルに対応する前記表示装置駆動回路又は前記不揮発性メモリ駆動回路のいずれかを選択する制御回路と、
を備える駆動回路。 - 前記第1電圧を出力する第1電源と、
前記第2電圧を出力する第2電源と、
前記制御回路が前記表示装置駆動回路を選択した場合に前記第1電源を前記レベルシフタ回路に接続し、前記制御回路が前記不揮発性メモリ駆動回路を選択した場合に前記第2電源を前記レベルシフタ回路に接続するスイッチ回路と、
をさらに備える、請求項6に記載の駆動回路。 - 前記第1電圧及び前記第2電圧を出力する昇圧回路を備え、
前記昇圧回路は、前記制御回路が前記表示装置駆動回路を選択した場合に前記第1電圧を前記レベルシフタ回路の電源として出力し、前記制御回路が前記不揮発性メモリ駆動回路を選択した場合に前記第2電圧を前記レベルシフタ回路の電源として出力する請求項6に記載の駆動回路。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005190230A JP4907908B2 (ja) | 2005-06-29 | 2005-06-29 | 駆動回路及び表示装置 |
| US11/475,070 US8269708B2 (en) | 2005-06-29 | 2006-06-27 | Driver unit including common level shifter circuit for display panel and nonvolatile memory |
| CNB2006100997044A CN100452136C (zh) | 2005-06-29 | 2006-06-29 | 用于显示面板和非易失性存储器的驱动器单元 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005190230A JP4907908B2 (ja) | 2005-06-29 | 2005-06-29 | 駆動回路及び表示装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2007010894A JP2007010894A (ja) | 2007-01-18 |
| JP4907908B2 true JP4907908B2 (ja) | 2012-04-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2005190230A Expired - Fee Related JP4907908B2 (ja) | 2005-06-29 | 2005-06-29 | 駆動回路及び表示装置 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US8269708B2 (ja) |
| JP (1) | JP4907908B2 (ja) |
| CN (1) | CN100452136C (ja) |
Families Citing this family (11)
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| JP5320964B2 (ja) | 2008-10-08 | 2013-10-23 | ソニー株式会社 | サイクリックシフト装置、サイクリックシフト方法、ldpc復号装置、テレビジョン受像機、及び、受信システム |
| JP5735219B2 (ja) | 2010-04-28 | 2015-06-17 | ラピスセミコンダクタ株式会社 | 半導体装置 |
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| JP5918440B2 (ja) | 2013-03-21 | 2016-05-18 | 日立オートモティブシステムズ株式会社 | 流量制御弁 |
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-
2005
- 2005-06-29 JP JP2005190230A patent/JP4907908B2/ja not_active Expired - Fee Related
-
2006
- 2006-06-27 US US11/475,070 patent/US8269708B2/en not_active Expired - Fee Related
- 2006-06-29 CN CNB2006100997044A patent/CN100452136C/zh not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US20070001981A1 (en) | 2007-01-04 |
| CN100452136C (zh) | 2009-01-14 |
| CN1892757A (zh) | 2007-01-10 |
| US8269708B2 (en) | 2012-09-18 |
| JP2007010894A (ja) | 2007-01-18 |
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