JP2022174190A - 表示ドライバ及び半導体装置 - Google Patents
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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
- G09G3/22—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
- G09G3/3258—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 voltage across the light-emitting element
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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
- G09G3/3685—Details of drivers for data electrodes
- G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/04—Generating or distributing clock signals or signals derived directly therefrom
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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
-
- 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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- 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
- G09G2310/0291—Details of output amplifiers or buffers arranged for use in a driving circuit
-
- 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
- G09G2310/08—Details of timing specific for flat panels, other than clock recovery
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- 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
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
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- Chemical & Material Sciences (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Optics & Photonics (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
Description
133 出力アンプ部
1330 バイアス電圧生成部
AP1~APn アンプ
CN 制御部
MB メインバイアス回路
RG1 電圧遷移時バイアス設定レジスタ
RG2 出力一定時バイアス設定レジスタ
SB1~SB3 サブバイアス回路
Claims (9)
- 第1~第N(Nは2以上の整数)のデータラインを有する表示デバイスを駆動する表示ドライバであって、
映像信号に基づく輝度レベルを画素毎に表す第1~第Nの画素データ片を受け、前記第1~第Nの画素データ片をクロック信号のエッジのタイミングで出力するデータ取込部と、
前記データ取込部から出力された前記第1~第Nの画素データ片を第1~第Nの階調電圧に変換する階調電圧生成部と、
前記第1~第Nの階調電圧を増幅して得た第1~第Nの駆動電圧を前記第1~第Nのデータラインに供給する第1~第Nのアンプと、
前記第1~第Nのアンプ各々の動作電流の電流値を設定するバイアス電圧を生成して前記第1~第Nのアンプに供給するバイアス電圧生成部と、を含み、
前記バイアス電圧生成部は、
前記動作電流の電流値を第1の電流値に設定する前記バイアス電圧の電圧値として第1の電圧値を表す第1の情報と、前記動作電流の電流値を前記第1の電流値よりも低い第2の電流値に設定する前記バイアス電圧の電圧値として第2の電圧値を表す第2の情報と、を記憶するレジスタを含み、
前記クロック信号の前記エッジの時点から第1の期間の経過時点までの間は、前記第1の情報で表される前記第1の電圧値を有する前記バイアス電圧を生成し、前記第1の期間の経過時点で前記バイアス電圧の電圧値を前記第2の情報で表される前記第2の電圧値に切り替えることを特徴とする表示ドライバ。 - 前記第1の期間は、前記階調電圧における最低輝度を表す電圧値から最高輝度を表す電圧値への遷移に応答して前記アンプから出力される前記駆動電圧の電圧値が前記最低輝度に対応した電圧値から前記最高輝度に対応した電圧値に遷移するまでに掛かる時間に対応した期間長を有することを特徴とする請求項1に記載の表示ドライバ。
- 前記レジスタには、前記第1の期間を表す情報が記憶されていることを特徴とする請求項1又は2に記載の表示ドライバ。
- 前記バイアス電圧生成部は、
基準電流を生成する電流源と、
前記基準電流に基づいて基準バイアス電圧を生成し、前記基準バイアス電圧に前記第1の情報に基づく調整を施すことにより前記第1の電圧値を得ると共に、前記基準バイアス電圧に前記第2の情報に基づく調整を施すことにより前記第2の電圧値を得る電圧調整部と、を含むことを特徴とする請求項1~3のいずれか1に記載の表示ドライバ。 - 前記アンプは、
入力される前記階調電圧と出力される出力電圧との電圧比で第1の動作電流を2分割した第1の電流及び第2の電流を生成する差動段と、
前記第1の電流及び前記第2の電流の差に対応した第2の動作電流を、駆動ノードに供給又は前記駆動ノードから引き抜くことにより前記駆動ノードに出力駆動電圧を生成するカレントミラー段と、
前記出力駆動電圧に対応した出力電流を、出力ノードに供給又は前記出力ノードから引き抜くことにより前記出力ノードに前記出力電圧を生成する出力段と、
前記バイアス電圧に応じて前記第1及び第2の動作電流の電流値を調整するバイアス調整部と、を含むことを特徴とする請求項1~4のいずれか1に記載の表示ドライバ。 - 前記表示デバイスにおいて前記第1~第Nのデータラインに交叉して配置されている第1~第Mの水平走査ライン(Mは2以上の整数)に順に水平走査パルスを印加して、前記第1~第Mの水平走査ラインの各々を順に駆動する走査ドライバを含み、
前記第1~第Mの水平走査ラインのうちで前記第1~第Nのアンプから遠い位置に配置されている前記水平走査ラインの駆動時に前記バイアス電圧生成部が用いる前記第1の期間の長さが、前記第1~第Nのアンプから近い位置に配置されている前記水平走査ラインの駆動時に前記バイアス電圧生成部が用いる前記第1の期間の長さよりも長いことを特徴とする請求項1~4のいずれか1に記載の表示ドライバ。 - 前記第1~第Nの駆動電圧のうちで電圧値の遷移幅が最も大きい駆動電圧の電圧値が所定の参照電圧値を超えた時点を前記第1の期間の経過時点として設定する切換判定部を含むことを特徴とする請求項1に記載の表示ドライバ。
- 前記第1~第Nの駆動電圧のうちで電圧値の遷移幅が最も大きい駆動電圧の電圧値と、前記遷移幅が最も大きい駆動電圧に対応した前記階調電圧との電圧値が等しくなった時点を前記第1の期間の経過時点として設定する切換判定部を含むことを特徴とする請求項1に記載の表示ドライバ。
- 第1~第N(Nは2以上の整数)のデータラインを有する表示デバイスを駆動する表示ドライバを含む半導体装置であって、
映像信号に基づく輝度レベルを画素毎に表す第1~第Nの画素データ片を受け、前記第1~第Nの画素データ片をクロック信号のエッジのタイミングで出力するデータ取込部と、
前記データ取込部から出力された前記第1~第Nの画素データ片を第1~第Nの階調電圧に変換する階調電圧生成部と、
前記第1~第Nの階調電圧を増幅して得た第1~第Nの駆動電圧を前記第1~第Nのデータラインに供給する第1~第Nのアンプと、
前記第1~第Nのアンプ各々の動作電流の電流値を設定するバイアス電圧を生成して前記第1~第Nのアンプに供給するバイアス電圧生成部と、を含み、
前記バイアス電圧生成部は、
前記動作電流の電流値を第1の電流値に設定する前記バイアス電圧の電圧値として第1の電圧値を表す第1の情報と、前記動作電流の電流値を前記第1の電流値よりも低い第2の電流値に設定する前記バイアス電圧の電圧値として第2の電圧値を表す第2の情報と、を記憶するレジスタを含み、
前記クロック信号の前記エッジの時点から第1の期間の経過時点までの間は、前記第1の情報で表される前記第1の電圧値を有する前記バイアス電圧を生成し、前記第1の期間の経過時点で前記バイアス電圧の電圧値を前記第2の情報で表される前記第2の電圧値に切り替えることを特徴とする半導体装置。
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KR102458736B1 (ko) * | 2018-03-20 | 2022-10-26 | 삼성디스플레이 주식회사 | 가변 화소 블록 경계를 가지는 표시 장치 |
US11164616B2 (en) * | 2019-07-09 | 2021-11-02 | Arm Limited | Bias generation circuitry |
CN116486746B (zh) * | 2023-04-28 | 2024-04-12 | 惠科股份有限公司 | 显示面板及显示装置 |
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- 2017-11-21 JP JP2017223602A patent/JP2019095545A/ja active Pending
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2018
- 2018-11-20 CN CN201811382451.0A patent/CN109817172B/zh active Active
- 2018-11-21 US US16/197,375 patent/US10847091B2/en active Active
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- 2022-09-07 JP JP2022142099A patent/JP2022174190A/ja active Pending
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US20190156756A1 (en) | 2019-05-23 |
CN109817172A (zh) | 2019-05-28 |
US10847091B2 (en) | 2020-11-24 |
JP2019095545A (ja) | 2019-06-20 |
CN109817172B (zh) | 2022-04-01 |
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