JP6190689B2 - 能動ピクセルを有する容量式画像形成装置 - Google Patents
能動ピクセルを有する容量式画像形成装置 Download PDFInfo
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- JP6190689B2 JP6190689B2 JP2013217037A JP2013217037A JP6190689B2 JP 6190689 B2 JP6190689 B2 JP 6190689B2 JP 2013217037 A JP2013217037 A JP 2013217037A JP 2013217037 A JP2013217037 A JP 2013217037A JP 6190689 B2 JP6190689 B2 JP 6190689B2
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- sensor
- insulator layer
- data line
- source follower
- transistor
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2605—Measuring capacitance
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
Description
Gn+1が起動されると、M2が高周波数の整流/検知ダイオードD1を短絡させ、検知接点J1をD1のバイアス電圧につなげることができる。リセットトランジスタM2を、次の行のイネーブル線(Gn+1)に接続することにより、分離した一連のリセット線を使用することなしに、能動ピクセル100をリセットすることができる。別の構成では、先行する行のイネーブル線(Gn−1)、分離リセット線、近接する列線のデータ線Dnなどの別の線によりM2をリセットすることができる。
Claims (10)
- 複数の能動ピクセルを含むセンサアレイであって、前記センサアレイ内の各能動ピクセルが、
ソースフォロワトランジスタを含む3トランジスタ(3T)センサと、
検知接点で寄生コンデンサと直列に接続する検知ダイオードであって、前記ソースフォロワトランジスタ増幅器のゲートが前記検知接点に接続する、検知ダイオードと、を含むセンサアレイと、
前記センサアレイを覆う絶縁体層であって、前記絶縁体層が、前記絶縁体層に近接する対象の部分に応じて、下部の能動ピクセルの前記検知接点に可変静電容量を供給し、前記可変静電容量を用いて、前記対象の画像を検知する、絶縁体層と、を含む容量式画像センサ。 - 前記ソースフォロワトランジスタが、少なくとも前記寄生コンデンサおよび前記絶縁体層に関するチャージポンプとして設定される、請求項1に記載の容量式画像センサ。
- 前記ソースフォロワトランジスタが、前記3Tセンサのデータ線にかけられた第1の電圧レベルに応じて、少なくとも前記寄生コンデンサおよび前記絶縁体層を帯電させ、前記データ線にかけられている第2の電圧レベルに応じて、検知された電圧が前記ソースフォロワトランジスタにより増幅され、前記検知された電圧に応じて前記データ線を流れる電流が、前記絶縁体層での前記可変静電容量と比例する、請求項1〜2のいずれか1項に記載の容量式画像センサ。
- 前記ソースフォロワトランジスタが、1)前記寄生コンデンサの静電容量値(Cp)、および2)前記絶縁体層により供給される前記変数静電容量(Cf)の最大値と、同じ桁の大きさのゲート静電容量(CM1)を有する、請求項1〜3のいずれか1項に記載の容量式画像センサ。
- CM1、Cp、およびCfの最大値は約10fFである、請求項4に記載の容量式画像センサ。
- 前記3Tセンサのデータ線にかけられた第1の電圧レベルに応じて、前記検知接点が帯電電圧で帯電し、前記帯電電圧は、前記ゲート静電容量、前記寄生コンデンサ、および前記絶縁体層に帯電し、前記データ線にかけられている第2の電圧レベルに応じて、前記検知接点が、前記ソースフォロワトランジスタにより増幅された、検知された電圧で帯電し、前記検知された電圧に応じて前記データ線を流れる電流は、前記絶縁体層での前記可変静電容量に比例する、請求項4に記載の容量式画像センサ。
- 前記絶縁体層は、ポリマー層を含み、前記センサは、前記絶縁体層と前記下部の能動ピクセルの前記検知接点とを接続する複数の導電性のパッドをさらに含む、請求項1に記載の容量式タッチパターンセンサ。
- 前記3Tセンサが、前記検知ダイオードと並列のリセットトランジスタと、前記ソースフォロワトランジスタと直列のイネーブリングトランジスタと、データ線と、をさらに含む、請求項1〜7のいずれか1項に記載の容量式タッチパターンセンサ。
- センサアレイ内の能動ピクセルの3トランジスタ(3T)センサのデータ線に第1の電圧レベルをかけるステップであって、前記3Tセンサは、前記データ線に接続する出力を有するソースフォロワトランジスタを含み、前記ソースフォロワトランジスタのゲートは検知接点と接続し、検知ダイオードは、前記検知接点で寄生コンデンサに直列に接続する、ステップと、
前記データ線に第2の電圧レベルをかけるステップと、
かけられている前記第2の電圧レベルに応じて前記データ線を流れる電流を決定するステップと、
前記電流に基づいて、前記能動ピクセルを覆う絶縁体層の可変静電容量を決定するステップと、
前記可変静電容量に基づいて、前記絶縁体層での近接パターンを決定するステップと、を含む方法。 - 少なくとも、前記第1の電圧レベルおよび第2の電圧レベルをかける前記ステップのとき、および前記データ線を流れる前記電流を決定する前記ステップのときに、前記ソースフォロワトランジスタと直列のイネーブリングトランジスタを起動させるステップをさらに含む請求項9に記載の方法。
Applications Claiming Priority (2)
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US13/667,112 US8618865B1 (en) | 2012-11-02 | 2012-11-02 | Capacitive imaging device with active pixels |
US13/667,112 | 2012-11-02 |
Publications (2)
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JP2014093774A JP2014093774A (ja) | 2014-05-19 |
JP6190689B2 true JP6190689B2 (ja) | 2017-08-30 |
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EP (1) | EP2728512B1 (ja) |
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- 2013-10-31 EP EP13191016.8A patent/EP2728512B1/en not_active Not-in-force
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EP2728512A3 (en) | 2015-07-01 |
US8618865B1 (en) | 2013-12-31 |
US9964575B2 (en) | 2018-05-08 |
US20140159746A1 (en) | 2014-06-12 |
EP2728512B1 (en) | 2018-08-08 |
JP2014093774A (ja) | 2014-05-19 |
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