JPWO2019234548A1 - 表示装置の駆動方法 - Google Patents
表示装置の駆動方法 Download PDFInfo
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- JPWO2019234548A1 JPWO2019234548A1 JP2020523840A JP2020523840A JPWO2019234548A1 JP WO2019234548 A1 JPWO2019234548 A1 JP WO2019234548A1 JP 2020523840 A JP2020523840 A JP 2020523840A JP 2020523840 A JP2020523840 A JP 2020523840A JP WO2019234548 A1 JPWO2019234548 A1 JP WO2019234548A1
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- 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]
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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
- 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
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- G09G2360/12—Frame memory handling
Abstract
Description
本実施の形態では、表示品質の劣化を抑制する表示装置の駆動方法について、図1乃至図7を用いて説明する。表示品質の劣化とは、画素が有するトランジスタ又は発光素子の電気特性が変化することで与えられた画像信号とは異なる階調で表示されることを示す。
本実施の形態では、液晶素子を用いた表示装置の構成例と、発光素子を用いた表示装置の構成例について説明する。なお、本実施の形態においては、実施の形態1で説明した表示装置の要素、動作及び機能の説明は省略する。
本実施の形態では、上記実施の形態に示した各トランジスタに置き換えて用いることのできるトランジスタの一例について、図面を用いて説明する。
図15(A1)は、ボトムゲート型のトランジスタの一種であるチャネル保護型のトランジスタ810のチャネル長方向の断面図である。図15(A1)において、トランジスタ810は基板771上に形成されている。また、トランジスタ810は、基板771上に絶縁層772を介して電極746を有する。また、電極746上に絶縁層726を介して半導体層742を有する。電極746はゲート電極として機能できる。絶縁層726はゲート絶縁層として機能できる。
図17(A1)に例示するトランジスタ842は、トップゲート型のトランジスタの1つである。トランジスタ842は、絶縁層729を形成した後に電極744a及び電極744bを形成する点がトランジスタ810やトランジスタ820と異なる。電極744a及び電極744bは、絶縁層728及び絶縁層729に形成した開口部において半導体層742と電気的に接続する。
本発明の一態様に係る表示装置を用いることができる電子機器として、表示機器、パーソナルコンピュータ、記録媒体を備えた画像記憶装置又は画像再生装置、携帯電話、携帯型を含むゲーム機、携帯データ端末、電子書籍端末、ビデオカメラ、デジタルスチルカメラ等のカメラ、ゴーグル型ディスプレイ(ヘッドマウントディスプレイ)、ナビゲーションシステム、音響再生装置(カーオーディオ、デジタルオーディオプレイヤー等)、複写機、ファクシミリ、プリンタ、プリンタ複合機、現金自動預け入れ払い機(ATM)、自動販売機などが挙げられる。これら電子機器の具体例を図19に示す。
本実施の形態では、トランジスタのチャネル形成領域に好適に用いることができる金属酸化物について説明する。
Claims (8)
- 表示装置が有する画素の劣化量を推定し、前記画素に与える第1画像信号を補正する前記表示装置の駆動方法であって、
前記表示装置は、表示パネル、フレームメモリ、及び演算部を有し、
前記表示パネルは、複数の画素を有し、
前記画素は、発光素子と、前記発光素子に電流を与えるトランジスタとを有し、
前記演算部は、回帰モデルに従って演算する機能を有し、
前記演算部には、第1観測信号と、第2観測信号とが与えられ、
前記第1観測信号は、前記フレームメモリから前記演算部に与えられる第3画像信号であり、
前記第2観測信号は、前記画素が有する前記発光素子、又は前記発光素子に電流を与える前記トランジスタのいずれか一に流れる第1電流値、もしくは前記第1電流値が変換された第1電圧値であり、
前記演算部には、予測誤差パラメータと、出力パラメータが設定され、
前記演算部が、前記回帰モデルに従い前記第1観測信号と前記第2観測信号から前記予測誤差パラメータを更新し、
前記演算部が、前記回帰モデルに従い前記予測誤差パラメータによって前記出力パラメータを更新し、
前記演算部が、前記フレームメモリから与えられる前記第1画像信号を前記出力パラメータによって補正して第2画像信号を生成し、
前記発光素子が、前記画素が有する前記トランジスタに与えられる前記第2画像信号によって点灯する
表示装置の駆動方法。 - 表示装置が有する画素の劣化量を推定し、前記画素に与える第1画像信号を補正する前記表示装置の駆動方法であって、
前記表示装置は、表示パネル、フレームメモリ、及び演算部を有し、
前記表示パネルは、複数の画素を有し、
前記画素は、発光素子と、前記発光素子に電流を与えるトランジスタとを有し、
前記演算部は、回帰モデルに従って演算する機能を有し、
前記演算部には、不定期に更新される予測誤差パラメータと、出力パラメータが設定され、
前記演算部が、前記回帰モデルに従いあらかじめ設定されている前記予測誤差パラメータによって前記出力パラメータを更新し、
前記演算部が、前記フレームメモリから与えられる前記第1画像信号を前記出力パラメータによって補正して第2画像信号を生成し、
前記発光素子が、前記画素が有する前記トランジスタに与えられる前記第2画像信号によって点灯する
表示装置の駆動方法。 - 表示装置が有する画素の劣化量を推定し、前記画素に与える第1画像信号を補正する前記表示装置の駆動方法であって、
前記表示装置は、表示パネル、フレームメモリ、及び演算部を有し、
前記表示パネルは、複数の画素を有し、
前記画素は、発光素子と、前記発光素子に電流を与えるトランジスタとを有し、
前記演算部は、回帰モデルに従って演算する機能を有し、
前記演算部には、第1観測信号と、第2観測信号とが与えられ、
前記第1観測信号は、前記フレームメモリから前記演算部に与えられる第3画像信号であり、
前記第2観測信号は、前記画素が有する前記発光素子、又は前記発光素子に電流を与える前記トランジスタのいずれか一に流れる第1電流値、もしくは前記第1電流値が変換された第1電圧値であり、
前記演算部には、予測誤差パラメータと、出力パラメータが設定され、
前記演算部が、前記回帰モデルに従い前記第1観測信号と前記第2観測信号から前記予測誤差パラメータを更新し、
前記演算部が、前記回帰モデルに従い前記予測誤差パラメータによって前記出力パラメータを更新し、
画素には、前記フレームメモリから与えられる前記第1画像信号と、前記出力パラメータとが与えられ、
前記画素が、前記第1画像信号を前記出力パラメータによって補正して第2画像信号を生成し、
前記発光素子が、前記画素が生成する前記第2画像信号によって点灯する
表示装置の駆動方法。 - 請求項1乃至3のいずれか一において、前記回帰モデルは状態方程式に基づくカルマンフィルタである表示装置の駆動方法。
- 請求項1乃至3のいずれか一において、
前記表示装置は、モニタ回路を有し、
前記モニタ回路は、モニタ用トランジスタを有し、
前記演算部には、前記モニタ用トランジスタに流れる第2電流値、もしくは前記第2電流値が変換された第2電圧値を第3観測信号として与え、
前記演算部が、前記第1観測信号、前記第2観測信号、前記第3観測信号を用いて前記予測誤差パラメータを更新する、
表示装置の駆動方法。 - 請求項1乃至3のいずれか一において、
前記表示装置は、モニタ回路を有し、
前記モニタ回路は、モニタ用発光素子を有し、
前記演算部には、前記モニタ用発光素子に流れる第3電流値、もしくは前記第3電流値が変換された第3電圧値を第4観測信号として与え、
前記演算部が、前記第1観測信号、前記第2観測信号、前記第4観測信号を用いて前記予測誤差パラメータを更新する、
表示装置の駆動方法。 - 請求項1乃至3のいずれか一の前記表示装置の駆動方法において、
表示装置は、トランジスタを有し、前記トランジスタは、半導体層に金属酸化物を有する表示装置の駆動方法。 - 請求項7において、
半導体層に金属酸化物を有する前記トランジスタは、バックゲートを有する表示装置の駆動方法。
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US11455940B2 (en) | 2022-09-27 |
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