JP5688051B2 - ディスプレイ装置および光変調器用制御回路 - Google Patents
ディスプレイ装置および光変調器用制御回路 Download PDFInfo
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- JP5688051B2 JP5688051B2 JP2012137360A JP2012137360A JP5688051B2 JP 5688051 B2 JP5688051 B2 JP 5688051B2 JP 2012137360 A JP2012137360 A JP 2012137360A JP 2012137360 A JP2012137360 A JP 2012137360A JP 5688051 B2 JP5688051 B2 JP 5688051B2
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- 239000010409 thin film Substances 0.000 claims description 20
- 239000011159 matrix material Substances 0.000 claims description 15
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 15
- 239000003990 capacitor Substances 0.000 claims description 14
- 229920005591 polysilicon Polymers 0.000 claims description 14
- 229910021417 amorphous silicon Inorganic materials 0.000 claims description 7
- 238000000034 method Methods 0.000 description 18
- 238000002425 crystallisation Methods 0.000 description 5
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- 229920001621 AMOLED Polymers 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 206010052143 Ocular discomfort Diseases 0.000 description 1
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- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 238000005401 electroluminescence Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000012887 quadratic function Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
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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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- G09G3/3208—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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Description
Ic=K(Vgs−Vth)2
ここでK=kW/2Lであり、かつ上式中
− Vgsはこのトランジスタの供給されるゲート−ソース電圧に相応し、この電圧はセットポイント電圧とも称され、
− Vthはこのトランジスタのトリップしきい値電圧に相応し、
− WおよびLはそれぞれ、トランジスタのチャネルの幅および長さに相応し、
− kはトランジスタを製造するために使用された技術の形式に依存している定数である。
− 行および列に分配されている発光体アレイを形成する複数の発光体を備え、
− アレイの発光体の放出を制御するための手段を備え、該手段は
− アレイのそれぞれの発光体に対して、発光体を制御することができる電流変調器を有しており、該電流変調器はソース電極、ドレイン電極、ゲート電極およびトリップしきい値電圧(Vth)を有しており、該トリップしきい値電圧は変調器毎に変化するものであり、
− 発光体のそれぞれの列の発光体をアドレス指定することができる列アドレス手段を有しており、該手段は前記変調器のゲート電極にデータ電圧を供給して該変調器を制御し、
− 発光体のそれぞれの行の発光体を選択電圧を供給することによって選択することができる行選択手段を有しており、
− それぞれの変調器のトリップしきい値電圧を補償するための補償手段を備え
ている形式のものにおいて、
− 前記補償手段は少なくとも1つの演算増幅器を有しており、該演算増幅器のフィードバックが少なくとも1つの変調器のトリップしきい値電圧を該電圧の値にいかんに拘わらず補償することができ、かつ
− 前記増幅器は反転入力側(−)、非反転入力側(+)および出力端子を有しており、かつ
− 演算増幅器の非反転入力側(+)は前記変調器を制御する列アドレス手段に接続されており、かつ
− 演算増幅器の反転入力側(−)は前記変調器のソース電極に接続されており、かつ − 演算増幅器の出力側は前記変調器のゲート電極に接続されている。
− 制御手段は、発光体と関連した前記変調器に対して、演算増幅器の出力側と前記変調器のゲート電極との間に接続されている少なくとも1つの第1の制御スイッチを有しており、該第1の制御スイッチは当該発光体に対する行選択電圧を受信することができるゲート電極を有している;および
− 制御手段は、発光体と関連した前記変調器に対して、演算増幅器の反転端子(−)と前記変調器のソース電極との間に接続されている第2の制御スイッチを有しており、該第2の制御スイッチは同時に選択電圧を受信することができるように前記第1の制御スイッチのゲート電極に接続されているゲート電極を有している;および
− 行選択手段は当該行における少なくとも1つの発光体を選択するために前記第1のスイッチの少なくとも1つのゲート電極に給電することができる;および
− 補償手段は列の発光体を制御する変調器のすべてのトリップしきい値電圧を補償することができる;および
− 変調器および第1の制御スイッチおよび第2の制御スイッチは薄膜ポリシリコンまたは薄膜アモルファスシリコンにおいて製造された構成要素である;および
− 変調器はn形トランジスタでありかつそのドレインは給電手段によって給電される;および
− 変調器はp形トランジスタでありかつ制御手段は更に、変調器のソースと電圧供給電極との間に配置されている受動構成要素を含んでいる;および
− それぞれの発光体は有機発光ダイオードである;および
− 受動構成要素は薄膜抵抗を有している;および
− 制御手段は更に、画像フレームの持続時間にわたりピクセルまたはサブピクセルの明るさを維持するために変調器のゲート電極とソース電極との間に接続されている少なくとも1つの充電コンデンサを含んでいる;および
− 制御手段はアクティブマトリクスを電圧安定化するために演算増幅器の出力側と反転入力側との間に接続されている補償コンデンサを含んでいる;および
− 変調器のドレイン電流は変調器に対する給電電圧間の差および変調器のゲートおよびソース間の電位差に依存している;および
− 補償手段は数個の演算増幅器を有しており、それぞれの演算増幅器は発光体を制御する変調器のトリップしきい値電圧を補償することができる。
Id=(Vdd−Vdata)/R (式1)。
Id=k・2.W/I(Vgs−Vth)2 (式2)。
付記1
アクティブマトリクス画像ディスプレイ装置であって、
− 行および列に分配されている発光体アレイを形成する複数の発光体(E jn ,E i
n ,E im )を備え、
− アレイの発光体の放出を制御するための手段を備え、該手段は
− アレイのそれぞれの発光体(E jn ,E in ,E im )に対して、発光体を制御することができる電流変調器(M in )を有しており、該電流変調器はソース電極、ドレイン電極、ゲート電極およびトリップしきい値電圧(V th )を有しており、該トリップしきい値電圧(V th )は変調器(M in )毎に変化するものであり、
− 発光体(E in ,E im )のそれぞれの列の発光体をアドレス指定することができる列アドレス手段を有しており、該手段は前記変調器(M in ,M im )のゲート電極にデータ電圧(V data , i) を供給して該変調器を制御し、
− 発光体のそれぞれの行の発光体を選択電圧を供給することによって選択することができる行選択手段を有しており、
− それぞれの変調器(M im )のトリップしきい値電圧(V th )を補償するための補償手段(A in ,A jn ,11,21)を備えている形式のものにおいて、
− 前記補償手段は少なくとも1つの演算増幅器を有しており、該演算増幅器のフィードバックが少なくとも1つの変調器のトリップしきい値電圧を該電圧の値にいかんに拘わらず補償することができ、かつ
− 前記増幅器は反転入力側(−)、非反転入力側(+)および出力端子を有しており、かつ
− 演算増幅器の非反転入力側(+)は前記変調器を制御する列アドレス手段に接続されており、かつ
− 演算増幅器の反転入力側(−)は前記変調器のソース電極に接続されており、かつ
− 演算増幅器の出力側は前記変調器のゲート電極に接続されている
ことを特徴とする画像ディスプレイ装置。
付記2
前記制御手段は、発光体と関連した前記変調器に対して、演算増幅器(A in ,11,21)の出力側と前記変調器(M in )のゲート電極との間に接続されている少なくとも1つの第1の制御スイッチ(I1)を有しており、該第1の制御スイッチは当該発光体(Ein)に対する行選択電圧(V select , in )を受信することができるゲート電極を有している付記1記載の画像ディスプレイ装置。
付記3
前記制御手段は、発光体と関連した前記変調器に対して、演算増幅器(A in ,11,21)の反転端子(−)と前記変調器(Min)のソース電極との間に接続されている第2の制御スイッチ(I2)を有しており、該第2の制御スイッチは同時に選択電圧(V select )を受信することができるように前記第1の制御スイッチ(I1)のゲート電極に接続されているゲート電極を有している付記2記載の画像ディスプレイ装置。
付記4
行選択手段は当該行における少なくとも1つの発光体(E in )を選択するために前記第1のスイッチの少なくとも1つのゲート電極に給電することができる
付記2または3記載の画像ディスプレイ装置。
付記5
補償手段は列の発光体(E in ,E im )を制御する変調器(M in ,M im )のすべてのトリップしきい値電圧(V th )を補償することができる付記1から4までのいずれか1つに記載の画像ディスプレイ装置。
付記6
変調器(M in )および第1の制御スイッチ(I1)および第2の制御スイッチ(I2)は薄膜ポリシリコンまたは薄膜アモルファスシリコンにおいて製造された構成要素である付記3から5までのいずれか1つに記載の画像ディスプレイ装置。
付記7
変調器(M in )はn形トランジスタでありかつそのドレインは給電手段(V dd )によって給電される付記1から6までのいずれか1つに記載の画像ディスプレイ装置。
付記8
変調器(M in )はp形トランジスタでありかつ
制御手段は更に、変調器(M in )のソースと電圧供給電極(V dd )との間に配置されている受動構成要素(R)を含んでいる付記1から6までのいずれか1つに記載の画像ディスプレイ装置。
付記9
それぞれの発光体(E)は有機発光ダイオードである付記1から8までのいずれか1つに記載の画像ディスプレイ装置。
付記10
定義されないトリップしきい値電圧(V th )を有する電流変調器(M)を制御するための回路であって、該回路はトリップしきい値電圧補償手段を含んでいる形式のものにおいて、
該トリップしきい値電圧補償手段は少なくとも1つの演算増幅器(11,21)を有しており、該演算増幅器の出力側は前記変調器のゲート電極に接続されており、該変調器の反転入力側(−)は該変調器のソース電極に接続されており、かつ該演算増幅器のフィードバックが変調器のトリップしきい値電圧を補償して、該変調器(M)を流れるドレイン電流の強度が変調器(M)のトリップしきい値電圧(V th )に無関係であるようにしたことを特徴とする電流変調器の制御回路。
Claims (5)
- アクティブマトリクス画像ディスプレイ装置であって、
行および列に配列される発光体のアレイを形成する複数の発光体と、
前記複数の発光体の発光を制御するための制御手段であって、前記制御手段は、
前記アレイの各発光体に対して、しきい値電圧に基づいて前記発光体の発光を制御する電流変調器であって、前記電流変調器はソース電極、ドレイン電極およびゲート電極を有する薄膜トランジスタであり、前記しきい値電圧は当該電流変調器毎に異なる、電流変調器と、
前記電流変調器を制御するために、当該電流変調器の前記ゲート電極にデータ電圧を供給することにより、発光体のそれぞれの列に配列される前記発光体をアドレス指定することができる列アドレス手段と、
行選択電圧を供給することにより、それぞれの行に配列される前記発光体を選択することができる行選択手段と、を有する、制御手段と、
各電流変調器の前記しきい値電圧を補償するための補償手段と、を含み、
前記補償手段は少なくとも1つの演算増幅器を有し、
前記演算増幅器は反転入力端子、非反転入力端子および出力端子を有し、前記演算増幅器の前記非反転入力端子は前記電流変調器を制御する列アドレス手段に接続され、前記演算増幅器の出力は前記電流変調器のゲート電極に接続され、
前記制御手段は、前記発光体に対応づけられた前記電流変調器に対して、前記演算増幅器の前記出力端子と前記電流変調器の前記ゲート電極との間に接続される第1の制御スイッチを有し、前記第1の制御スイッチは前記発光体に対する前記行選択電圧を受信することができるゲート電極を有し、
前記制御手段は、前記発光体に対応づけられた前記電流変調器に対して、前記演算増幅器の前記反転入力端子と前記電流変調器の前記ソース電極との間に接続される第2の制御スイッチを有し、前記第2の制御スイッチは、同時に前記行選択電圧を受信するために、前記第1の制御スイッチの前記ゲート電極に接続されるゲート電極を有し、
前記制御手段は、前記電流変調器の前記ソース電極と供給電極との間に配置される受動構成要素を有し、
前記演算増幅器の前記反転入力端子は、前記しきい値電圧の電圧値がどのような値であっても、列に配置される前記発光体を制御する前記電流変調器すべての前記しきい値電圧を補償することができる前記演算増幅器のフィードバックを供給するために、前記電流変調器の前記ソース電極と前記受動構成要素との間に配置されたノードに前記第2の制御スイッチを介して接続され、
前記制御手段は前記電流変調器の前記ゲート電極と前記ノードとの間に接続された記憶コンデンサを有し、該記憶コンデンサが前記電流変調器の前記ゲート電極に供給される電圧を記憶する、前記画像ディスプレイ装置。 - 前記行選択手段は、前記行における少なくとも1つの発光体を選択するために前記第1の制御スイッチの少なくとも1つのゲート電極に給電することができる、請求項1に記載の画像ディスプレイ装置。
- 前記電流変調器、前記第1の制御スイッチ、および、前記第2の制御スイッチは、薄膜ポリシリコンまたは薄膜アモルファスシリコンで製造された薄膜トランジスタである、請求項1または2に記載の画像ディスプレイ装置。
- 前記電流変調器はp形トランジスタである、請求項1ないし3のいずれか1項に記載の画像ディスプレイ装置。
- 各発光体は有機発光ダイオードである、請求項1ないし4のいずれか1項に記載の画像ディスプレイ装置。
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CN106910465A (zh) * | 2017-02-24 | 2017-06-30 | 信利(惠州)智能显示有限公司 | 发光显示装置 |
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US6097360A (en) * | 1998-03-19 | 2000-08-01 | Holloman; Charles J | Analog driver for LED or similar display element |
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JP2002108285A (ja) * | 2000-07-27 | 2002-04-10 | Semiconductor Energy Lab Co Ltd | 表示装置の駆動方法 |
JP2002091377A (ja) * | 2000-09-11 | 2002-03-27 | Hitachi Ltd | 有機elディスプレイ装置 |
GB2367414A (en) * | 2000-09-28 | 2002-04-03 | Seiko Epson Corp | Display device using TFT's |
TW561445B (en) * | 2001-01-02 | 2003-11-11 | Chi Mei Optoelectronics Corp | OLED active driving system with current feedback |
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JP4115763B2 (ja) * | 2002-07-10 | 2008-07-09 | パイオニア株式会社 | 表示装置及び表示方法 |
GB0223304D0 (en) * | 2002-10-08 | 2002-11-13 | Koninkl Philips Electronics Nv | Electroluminescent display devices |
DE10254511B4 (de) * | 2002-11-22 | 2008-06-05 | Universität Stuttgart | Aktiv-Matrix-Ansteuerschaltung |
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2003
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TWI376975B (en) | 2012-11-11 |
WO2005013250A1 (fr) | 2005-02-10 |
US20070057874A1 (en) | 2007-03-15 |
JP2012230392A (ja) | 2012-11-22 |
CN100433109C (zh) | 2008-11-12 |
FR2857146A1 (fr) | 2005-01-07 |
CN1816837A (zh) | 2006-08-09 |
KR20070029539A (ko) | 2007-03-14 |
MXPA05014178A (es) | 2006-07-03 |
US7557778B2 (en) | 2009-07-07 |
TW200505268A (en) | 2005-02-01 |
EP1644913B1 (fr) | 2013-08-07 |
KR101391813B1 (ko) | 2014-05-07 |
JP2007516454A (ja) | 2007-06-21 |
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