JP7048305B2 - 表示装置 - Google Patents
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- JP7048305B2 JP7048305B2 JP2017247510A JP2017247510A JP7048305B2 JP 7048305 B2 JP7048305 B2 JP 7048305B2 JP 2017247510 A JP2017247510 A JP 2017247510A JP 2017247510 A JP2017247510 A JP 2017247510A JP 7048305 B2 JP7048305 B2 JP 7048305B2
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- 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
- G09G3/3233—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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- 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]
- G09G3/3266—Details of drivers for scan electrodes
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
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- H10K59/10—OLED displays
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- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
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- H10K59/123—Connection of the pixel electrodes to the thin film transistors [TFT]
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/124—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits
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- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/1255—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs integrated with passive devices, e.g. auxiliary capacitors
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
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Description
発明者は、映像信号のダイナミックレンジが広い画素を有するEL表示装置を検討している。一般的に、EL表示装置は、基板上に形成された複数の画素の各々が、駆動トランジスタ、容量素子、発光素子、及び発光素子に含まれる付加容量等で構成されている。発光素子に含まれる付加容量とは、例えばダイオード特性を有する発光素子自体が容量成分も有している場合を含む。各画素を駆動する信号によって、映像信号が駆動トランジスタに供給される。駆動トランジスタに供給された映像信号によって、駆動トランジスタが電流を発光素子に供給する。そして、発光素子が発光することで、表示装置は映像を表示することができる。発明者は、第1電極が第1ノードに接続され、第2電極が第2ノードに接続され、第3電極が第3ノードに接続される駆動トランジスタを有する画素において、第1ノードと第2ノードの間、又は、第1ノードと第3ノードの間の何れか一方に、意図的に容量素子(Csx)を設けることを試みた。詳細は図3などを用いて説明するが、発明者は、この構成によって、映像信号のダイナミックレンジを駆動トランジスタのダイナミックレンジよりも広くできることを見出した。
本実施形態では、本発明の一実施形態に係る表示装置を説明する。なお、本明細書などでは、表示装置はアクティブマトリクス型のEL表示装置であるとして、説明する。
図1は、本発明の一実施形態に係る表示装置の模式的な平面図である。表示装置100は、基板502、表示領域504、映像信号線駆動回路506、走査信号線駆動回路510、制御回路122、端子電極514、及び周辺領域516を有する。表示領域504、映像信号線駆動回路506、走査信号線駆動回路510、制御回路122、端子電極514、及び周辺領域516は、基板502の上面に設けられる。表示領域504は、表示装置100に映像を表示するための画素120を有する。画素120は、トランジスタを有する。トランジスタを駆動することで、表示装置100に映像を表示することができる。
図3は、本発明の一実施形態に係る画素120の回路図である。図2に示したn行m列の画素120の回路図を示している。画素120は、副画素としてもよい。
図4~図17を用いて、本発明の一実施形態の係る表示装置が有する画素の模式的なレイアウトと、本発明の一実施形態の係る表示装置が有する画素の積層構造を説明する。なお、図4~図17を用いた説明において、図1~図3で説明した内容と同様の説明は、省略することがある。
図18~図30を用いて、本発明の一実施形態に係る表示装置の駆動方法を説明する。なお、図18~図30を用いた説明において、図1~図17で説明した内容と同様の説明は、省略することがある。
本実施形態では、本発明の一実施形態に係る表示装置の他の構成を説明する。なお、第1実施形態と同様の構成に関しては説明を省略することがある。
本実施形態では、本発明の一実施形態に係る表示装置の積層構造を説明する。なお、第1実施形態及び第2実施形態と同様の構成に関しては説明を省略することがある。
Claims (12)
- 第1電極が第1ノードに接続され、第2電極が第2ノードに接続され、第3電極が第3ノードに接続される駆動トランジスタと、
一方の電極が前記駆動トランジスタの第1電極が設けられる層と同一の層に設けられる第1導電層から構成され、かつ、前記第1ノードに接続され、他方の電極が前記駆動トランジスタの活性層が設けられる層と同一の層に設けられる半導体層から構成され、かつ、前記第2ノードに接続される第1容量素子と、
第2共通電極と前記第1ノードとの間に接続される第2容量素子と、
前記第1ノードと前記第3ノードとの間に接続される第1スイッチと、
映像信号線と前記第2ノードとの間に接続される第2スイッチと、
第3共通電極と前記第1ノードとの間に接続される第3スイッチと、
電源線と前記第2ノードとの間に接続される第4スイッチと、
前記第3ノードに電気的に接続される画素電極と、第1共通電極とを有する発光素子と、
前記第3ノードと前記画素電極との間に接続される第5スイッチと、
前記第3共通電極と前記画素電極との間に接続される第6スイッチと、
を備える画素を有する表示装置。 - 前記第1導電層は前記半導体層と重畳する、請求項1に記載の表示装置。
- 前記第1容量素子の容量値は前記第2容量素子の容量値よりも小さい、請求項1又は請求項2に記載の表示装置。
- 前記第1容量素子の容量値は、前記第2容量素子の容量値の30%以上50%以下である請求項3に記載の表示装置。
- 前記第1共通電極の電位は、前記第2共通電極の電位よりも小さい、請求項3に記載の表示装置。
- 前記第2共通電極の電位は、前記電源線の電位と略同一である、請求項1に記載の表示装置。
- 前記第1スイッチと前記駆動トランジスタと前記第2スイッチとが導通するとき、前記第1容量素子の前記一方の電極と前記他方の電極との間に、前記駆動トランジスタの閾値電圧に相当する電荷が保持され、
前記発光素子が発光するとき、前記発光素子が発光しないときと比較して、前記第1ノードの電位が、前記第1容量素子の前記容量値と前記第2容量素子の前記容量値とから算出される比率の分、増加する請求項3又は請求項4に記載の表示装置。 - 前記第3共通電極の電位は、前記電源線の電位、及び、前記第2共通電極の電位よりも小さい、請求項6に記載の表示装置。
- 前記第3共通電極を構成する第2導電層は、前記第1導電層及び前記半導体層の両方と重畳する、請求項8に記載の表示装置。
- 第1電極が第1ノードに接続され、第2電極が第2ノードに接続され、第3電極が第3ノードに接続される駆動トランジスタと、
一方の電極が前記駆動トランジスタの第1電極が設けられる層と同一の層に設けられる導電層から構成され、かつ、前記第1ノードに接続され、他方の電極が前記駆動トランジスタの活性層が設けられる層と同一の層に設けられる半導体層から構成され、かつ、前記第3ノードに接続される第1容量素子と、
前記第1ノードと前記第3ノードとの間に接続される第1スイッチと、
前記第3ノードに電気的に接続される画素電極と、第1共通電極とを有する発光素子と、
を備える画素を有する表示装置。 - 前記画素は、第2共通電極と前記第1ノードとの間に接続される第2容量素子を有し、
前記第1容量素子の容量値は前記第2容量素子の容量値よりも小さい、請求項10に記載の表示装置。 - 前記第1容量素子の容量値は、前記第2容量素子の容量値の30%以上50%以下である請求項11に記載の表示装置。
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