JP2007519050A - 電荷制御回路 - Google Patents
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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
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- G09G3/3433—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 light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
- G09G3/3466—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 light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on interferometric effect
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
- G02B26/0833—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD
- G02B26/0841—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD the reflecting element being moved or deformed by electrostatic means
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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
- G09G3/34—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
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- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/04—Structural and physical details of display devices
- G09G2300/0439—Pixel structures
- G09G2300/0456—Pixel structures with a reflective area and a transmissive area combined in one pixel, such as in transflectance pixels
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- 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
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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
- G09G2300/0847—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 without any storage capacitor, i.e. with use of parasitic capacitances as storage elements
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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
- G09G2310/0243—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
- G09G2310/0278—Details of driving circuits arranged to drive both scan and data 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
- G09G2310/06—Details of flat display driving waveforms
- G09G2310/061—Details of flat display driving waveforms for resetting or blanking
Abstract
Description
[例示的な構造]
図1は、微小電気機械システム(MEMS)(100)の例示的な実施形態を示すブロック図である。MEMS(100)は、電荷制御回路(105)と微小電気機械装置(MEM装置)(110)を含む。電荷制御回路(105)は、可変電力源(115)、コントローラ(120)、及びスイッチ回路(125)を更に含む。MEM装置(110)は、可変ギャップ間隔(145)だけ離された第1の導電性電極(135)と第2の導電性電極(140)とを含む可変キャパシタ(130)を更に含む。第1の導電性電極(135)と第2の導電性電極(140)とを隔てる可変ギャップ間隔(145)は、可変キャパシタ(130)において蓄積された電荷の大きさの関数である。第1の導電性電極(135)と第2の導電性電極(140)との間の相対運動に対応するために、導電性電極のいずれか一方を、他方が移動可能である場合に、固定することができる。参照しやすくするために、この例示的な実施形態に従って、第2の導電性電極(140)が、固定電極と見なされる。
[例示的な実施形態と動作]
図2は、MEM装置(110−1)の例示的な一実施形態を示す図である。例示的な実施形態において、MEM装置(110−1)は、表示可能画像の画素(ピクセル)を少なくとも部分的に表示する。MEM装置(110−1)は、最上部反射器(200)、底部反射器(210)、可撓性部材(フレクシャ:flexure)(220)、及びばね機構(230)を備える。前記反射器(200、210)によって共振光学キャビティ(240)が画定される。2つの反射器(200、210)は、可変ギャップ間隔(145−1)だけ離されている。最上部反射器(200)は、半透過性か又は半反射性とすることができ、きわめて高い反射性か又は完全な反射性の底部反射器(210)と共に使用されることが可能であり、又逆の場合も同様に可能である。ばね機構(230)は、線形か又は非線形なばね機能を有する重合体のような任意の適合可能な可撓性材料とすることができる。
式I:
式II:
F=k(d0−d)
ここで、kは線形ばね定数、d0はギャップ間隔(145−1)の初期値、dは瞬時のギャップ間隔(145−1)である。
式III:
式IV:
Q=CINTVREF
ここで、VREFは選択された基準電圧、CINTはMEM装置(110−1)の初期静電容量である。イネーブル信号(すなわち、電気的時定数)の継続時間を、機械的時定数よりも短く維持することによって、基準電圧が、所望の電荷を配送するためにある特定の継続時間の間、MEM装置(110−1)に印加され、次いで除去される。基準電圧が除去されると、MEM装置(110−1)は浮遊状態にされるか又はトライステートにされ、従って蓄積による追加的な電荷が阻止され、MEM装置(110−1)の直接的な電圧制御に比べて広げられた制御範囲についてのギャップ間隔の効果的な制御が可能になる。
Claims (10)
- 電荷制御回路(105、125−1)であって、
ある選択された電圧レベルにおける基準電圧(450)を受けるよう構成された入力ノード(340)を有し、且つ、充電信号(440)に応答して前記入力ノード(340)を前記選択された電圧レベルにおけるパルス電荷で事前充電するように構成された、スイッチ回路(125、125−1、125−2)
を備え、
前記スイッチ回路(125、125−1、125−2)は、第1及び第2の電極(135−1、140−1)を備えた可変キャパシタ(130、130−1)を有する微小電気機械装置(MEM装置)(110、110−1、110−2、110−3)の機械的時定数よりも短い継続時間を有するイネーブル信号(430)に応答するよう構成された単一スイッチを更に含み、
前記単一スイッチは、前記MEM装置(110、110−1、110−2、 110−3)に結合されて、前記継続時間中に前記MEM装置(110、110−1、110−2、110−3)の可変キャパシタ(130、130−1)の第1の電極と第2の電極(135−1、140−1)との間に前記選択された電圧レベルを印加して、これにより、前記パルス電荷が前記可変キャパシタ(130、130−1)において蓄積させられることからなる、電荷制御回路。 - 前記単一スイッチが、トランジスタ(300、310、320、330)を含む、請求項1に記載の電荷制御回路。
- 前記単一スイッチが第1のスイッチであり、前記第1のスイッチが前記MEM装置(110、110−1、110−2、110−3)と第2のスイッチとの間になるように、前記入力ノード(340)と前記第1のスイッチとに結合された前記第2のスイッチを前記スイッチ回路(125、125−1、125−2)が更に含み、
前記第2のスイッチが、前記充電イネーブル信号(430)に応答して閉じて前記入力ノード(340)に前記基準電圧(450)を提供して、前記入力ノード(340)を前記パルス電荷で充電するよう構成されることからなる、請求項1に記載の電荷制御回路。 - 前記入力ノード(340)に結合され、且つ、前記選択された電圧レベルにおける前記基準電圧(450)を提供するように構成された、可変電力源(115)を更に含む、請求項1に記載の電荷制御回路。
- 微小電気機械セルであって、
可変ギャップ間隔(145、145−1)だけ離された第1の導電性電極(135)と第2の導電性電極(140)とによって形成された可変キャパシタ(130、130−1)を有する微小電気機械(MEM)装置(110、110−1、110−2、110−3)と、
ある選択された電圧レベルにおける基準電圧(450)を受けるよう構成された入力ノード(340)を有し、且つ、充電信号(440)に応答して前記入力ノード(340)を前記選択された電圧レベルにおけるパルス電荷で事前充電するように構成された、スイッチ回路(125、125−1、125−2)
とを備え、
MEM装置(110、110−1、110−2、110−3)の機械的時定数よりも短い継続時間を有するイネーブル信号(430)に応答するよう構成された前記可変キャパシタ(130、130−1)に結合され、且つ、前記MEM装置(110、110−1、110−2、110−3)に結合されて前記継続時間中に第1の電極と第2の電極(135−1、140−1)との間に前記選択された電圧レベルを印加することにより前記可変キャパシタ(130、130−1)において前記パルス電荷が蓄積される、第1のスイッチだけを、前記スイッチ回路(125、125−1、125−2)が更に含むことからなる、微小電気機械セル。 - 微小電気機械システム(100)であって、
微小電気機械セル(140)のM行×N列をなすアレイであって、可変ギャップ間隔(145、145−1)だけ離された第1の導電性電極(135)と第2の導電性電極(140)によって形成された可変キャパシタ(130、130−1)を有するMEM装置(110、110−1、110−2、110−3)を各セルが含むことからなる、M行×N列をなすアレイと、
ある選択された電圧レベルにおける基準電圧(450)を受けるよう構成された入力ノード(340)を有し、且つ、充電信号(440)に応答して前記入力ノード(340)を前記選択された電圧レベルにおけるパルス電荷で事前充電するように構成された、スイッチ回路(125、125−1、125−2)であって、前記可変キャパシタ(130、130−1)に結合され、且つ、MEM装置(110、110−1、110−2、110−3)の機械的時定数よりも短い継続時間を有するイネーブル信号(430)に応答するよう構成され、且つ、前記MEM装置(110、110−1、110−2、110−3)に結合されて前記継続時間中に前記MEM装置(110、110−1、110−2、110−3)の可変キャパシタ(130、130−1)の第1の電極と第2の電極(135−1、140−1)との間に前記選択された電圧レベルを印加することにより前記パルス電荷が前記可変キャパシタ(130、130−1)において蓄積させられる、単一スイッチを、更に含むことからなる、スイッチ回路
とを備える、微小電気機械システム。 - 可変キャパシタ(130、130−1)を有する微小電気機械装置(110、110−1、110−2、110−3)を制御する方法であって、
入力ノード(340)を充電するために、事前に選択した電圧レベルにおける電圧を印加し、
前記微小電気機械装置の機械的時定数よりも短い継続時間中に第1のスイッチを閉じるために、イネーブル信号(430)を前記第1のスイッチに提供し、及び、
前記電荷を前記可変キャパシタ(130、130−1)に印加する
ことを含み、
前記電荷が、前記可変キャパシタ(130、130−1)の第1の導電性電極と第2の導電性電極(135、140)との間のギャップ間隔(145、145−1)に対応し、
前記第1のスイッチが、前記可変キャパシタ(130、130−1)に直接的に結合された唯一のスイッチであることからなる、方法。 - 電荷制御回路(105、125−1)であって、
ある選択された電流レベルにおける基準電流を受けるよう構成された入力ノード(340)を有し、且つ、充電信号(440)に応答して前記入力ノード(340)を前記選択された電流レベルにおけるパルス電流で事前充電するように構成された、スイッチ回路(125、125−1、125−2)
を備え、
微小電気機械装置(MEM装置)(110、110−1、110−2、110−3)の機械的時定数よりも短い継続時間を有するイネーブル信号(430)に応答するよう構成され、且つ、前記MEM装置(110、110−1、110−2、110−3)に結合されて前記継続時間中に前記MEM装置(110、110−1、110−2、110−3)の可変キャパシタ(130、130−1)の第1の電極と第2の電極(135−1、140−1)との間に前記選択された電流レベルを印加することにより前記パルス電流が前記可変キャパシタ(130、130−1)において蓄積される、第1のスイッチを、前記スイッチ回路(125、125−1、125−2)が更に含み、
前記第1のスイッチだけが、前記キャパシタに接続されていることからなる、電荷制御回路。 - 前記可変ギャップ間隔(145、145−1)が、前記蓄積電荷の大きさの関数である、請求項8に記載の電荷制御回路。
- 前記MEM装置(110、110−1、110−2、110−3)に結合され、且つ、前記充電信号(440)に応答して閉じて前記入力ノード(340)に前記基準電流を提供して、前記入力ノード(340)を前記パルス電流で充電するように構成された、第2のスイッチを、前記スイッチ回路(125、125−1、125−2)が更に含む、請求項8に記載の電荷制御回路。
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US10/763,006 | 2004-01-22 | ||
US10/763,006 US7218499B2 (en) | 2003-05-14 | 2004-01-22 | Charge control circuit |
PCT/US2004/041860 WO2005073950A1 (en) | 2004-01-22 | 2004-12-14 | A charge control circuit |
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DE (1) | DE112004002667B4 (ja) |
GB (1) | GB2427035B (ja) |
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US20040240138A1 (en) | 2004-12-02 |
GB2427035B (en) | 2007-10-03 |
TWI245301B (en) | 2005-12-11 |
WO2005073950A1 (en) | 2005-08-11 |
DE112004002667B4 (de) | 2009-12-17 |
TW200525570A (en) | 2005-08-01 |
DE112004002667T5 (de) | 2006-12-21 |
JP4740156B2 (ja) | 2011-08-03 |
US7218499B2 (en) | 2007-05-15 |
GB2427035A (en) | 2006-12-13 |
GB0613056D0 (en) | 2006-08-23 |
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