JP4988603B2 - 画像表示装置及びこの装置の制御方法 - Google Patents
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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
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- 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]
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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
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- 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
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- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
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Description
a)行及び列に分けられ、ネットワークを形成する多数の発光体と、
b)前記発光体へ電力を供給する手段と、
c)前記発光体を制御する手段と、
d)少なくとも1つの逆バイアス電圧発生器とを有し、
前記発光体を制御する手段は、
−ソース電極、ドレイン電極、及びゲート電極を有する、夫々の発光体ごとの電流変調器であって、該変調器のトリガ閾値電圧よりも大きいか、あるいは前記トリガ閾値電圧に等しい、前記ソース電極と前記ゲート電極との間の電圧を前記発光体へ供給するようドレイン電流を流すことが可能な電流変調器と、
−第1の端子及び第2の端子を有し、夫々の変調器のゲート電極で電荷を蓄えることが可能な、夫々の発光体ごとの蓄積コンデンサと、
−夫々の列の前記発光体へ表示データを入力することが可能なアドレス指定手段と、
−夫々の発光体ごとの選択スイッチを有し、該選択スイッチは、特に、夫々の変調器のゲート電極とソース電極との間に加えられるべき前記アドレス指定手段によって供給されるアドレス指定データを有効にするために用いられるところの、夫々の行の前記発光体を選択することが可能な選択手段とを有し、
前記少なくとも1つの逆バイアス電圧発生器は、特に、夫々の変調器のトリガ閾値電圧の変動を補償するよう、夫々の変調器のゲート電極とソース電極との間で前記アドレス指定データのバイアスの逆バイアス電圧を加える、アクティブマトリクスを備えた画像表示装置に関する。
−一方で夫々の変調器のゲート電極及び当該発光体の前記蓄積コンデンサの第1の端子と、他方で前記逆バイアス電圧発生器及び当該発光体の前記蓄積コンデンサの第2の端子との間に接続された、夫々の発光体ごとの逆バイアススイッチと、
−夫々が発光体の行の前記逆バイアススイッチの全てを駆動することが可能な制御電極とを更に有する、ことを特徴とする画像表示装置である。
−前記選択手段は、特に前記選択スイッチを駆動するための選択電極を有し、該選択電極は、別個であり、前記制御電極から独立していること、
−前記発光体によって形成されるネットワークは、第1群の発光体の行と、第2群の発光体の行とを有し、前記第1群及び前記第2の群の行は間に挟まれ、夫々の制御電極は、前記第1群の発光体の行の前記逆バイアススイッチのゲートへ、及び前記第2群の発光体の行の前記選択スイッチのゲートへ接続されて、これら発光体の行に属する前記選択スイッチ及び前記制御スイッチの同時の閉成を制御すること、
−当該装置は、当該装置の全ての前記逆バイアススイッチへ接続された単一の逆バイアス電圧発生器を有すること、及び
−当該装置は、多数の逆バイアス電圧発生器を有し、該逆バイアス電圧発生器は、夫々、特に、他の発生器によって生成された逆バイアス電圧とは異なる特有の逆バイアス電圧を生成するために用いられ、夫々の発生器は、発光体の行の全ての前記逆バイアススイッチへのみ接続されること、
のうちの1又はそれ以上を有する。
−所定周波数で前記第1行の発光体の選択スイッチへ接続された制御電極へ第1の選択電圧を印加するステップと、
−前記所定周波数と同じ周波数で前記第2行の発光体の選択スイッチへ接続された制御電極へ第2の選択電圧を印加するステップとを有し、
前記第1の選択電圧及び前記第2の選択電圧の印加は、半周期だけオフセットされ、該半周期の存続期間は、画像ハーフフレームの存続期間に等しい、ことを特徴とする方法である。
−所定周波数で前記選択電極へ選択電圧を印加するステップと、前記所定周波数と同じ周波数で前記制御電極へ制御電圧を印加するステップとを有し、前記制御電圧の印加は、前記選択電圧の印加に対して一部の周期だけ時間においてオフセットされること、
−前記一部の周期は半周期に等しいこと、
−前記一部の周期は3分の1周期に等しいこと、及び
−周期の存続期間は画像フレームの存続期間に等しいこと、
のうちの1又はそれ以上を有する。
24を有する。
Claims (9)
- a)行及び列に分けられ、ネットワークを形成する多数の発光体と、
b)前記発光体へ電力を供給する手段と、
c)前記発光体を制御する手段と、
d)複数の逆バイアス電圧発生器とを有し、
前記複数の逆バイアス電圧発生器の夫々は、他の発生器によって生成された逆バイアス電圧とは異なる逆バイアス電圧を生成し、
前記発光体を制御する手段は、
−ソース電極、ドレイン電極、及びゲート電極を有する、夫々の発光体ごとの電流変調器であって、該変調器のトリガ閾値電圧よりも大きいか、あるいは前記トリガ閾値電圧に等しい、前記ソース電極と前記ゲート電極との間の電圧を前記発光体へ供給するようドレイン電流を流すことが可能な電流変調器と、
−第1の端子及び第2の端子を有し、夫々の変調器のゲート電極で電荷を蓄えることが可能な、夫々の発光体ごとの蓄積コンデンサと、
−夫々の列の前記発光体へ表示データを入力することが可能なアドレス指定手段と、
−夫々の発光体ごとの選択スイッチを有し、該選択スイッチが、夫々の変調器のゲート電極とソース電極との間に加えられるべき前記アドレス指定手段によって供給されるアドレス指定データを有効にするために用いられる、夫々の行の前記発光体を選択することが可能な選択手段とを有する、アクティブマトリクスを備えた画像表示装置であって、
−一方で夫々の変調器のゲート電極及び当該発光体の前記蓄積コンデンサの第1の端子と、他方で前記逆バイアス電圧発生器及び当該発光体の前記蓄積コンデンサの第2の端子との間に接続された、夫々の発光体ごとの逆バイアススイッチと、
−夫々が発光体の行の前記逆バイアススイッチの全てを駆動することが可能な制御電極とを更に有し、
夫々の逆バイアス電圧発生器は、発光体の行の全ての前記逆バイアススイッチへのみ接続される、ことを特徴とする画像表示装置。 - 前記選択手段は、前記選択スイッチを駆動するための選択電極を有し、
該選択電極は、別個であり、前記制御電極から独立している、ことを特徴とする請求項1記載の装置。 - 前記発光体によって形成されるネットワークは、発光体の複数の行から成る第1群と、発光体の複数の行から成る第2群とを有し、前記第1群及び前記第2の群の行は、前記第1群における各行と前記第2群における各行とが交互に位置するよう交互配置され、
夫々の制御電極は、前記第1群の発光体の行の前記逆バイアススイッチのゲートへ、及び前記第2群の発光体の行の前記選択スイッチのゲートへ接続されて、これら発光体の行に属する前記選択スイッチ及び前記制御スイッチの同時の閉成を制御する、ことを特徴とする請求項1記載の装置。 - 当該装置の全ての前記逆バイアススイッチへ接続された単一の逆バイアス電圧発生器を有する、ことを特徴とする請求項1乃至3のうちいずれか一項記載の装置。
- 発光体の第1の行及び発光体の第2の行を有する請求項3記載の画像表示装置の駆動方法であって、
−所定周波数で前記発光体の第1の行の選択スイッチへ接続された制御電極へ第1の選択電圧を印加するステップと、
−前記所定周波数と同じ周波数で前記発光体の第2の行の選択スイッチへ接続された制御電極へ第2の選択電圧を印加するステップとを有し、
前記第1の選択電圧及び前記第2の選択電圧の印加は、互いに対して半周期だけ遅延され、該半周期の存続期間は、画像ハーフフレームの存続期間に等しい、ことを特徴とする方法。 - 発光体の第1の行及び発光体の第2の行を有する請求項2記載の画像表示装置の駆動方法であって、
−所定周波数で前記選択電極へ選択電圧を印加するステップと、
−前記所定周波数と同じ周波数で前記制御電極へ制御電圧を印加するステップとを有し、
前記制御電圧の印加は、前記選択電圧の印加に対して一部の周期だけ時間において遅延される、ことを特徴とする駆動方法。 - 前記一部の周期は半周期に等しい、ことを特徴とする請求項6記載の駆動方法。
- 前記一部の周期は3分の1周期に等しい、ことを特徴とする請求項6記載の駆動方法。
- 周期の存続期間は画像フレームの存続期間に等しい、ことを特徴とする請求項6乃至8のうちいずれか一項記載の駆動方法。
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