US 2013/0155038 A1Published application

Displaying apparatus

AssigneeCanon Kabushiki Kaisha

InventorsTakanori Yamashita, Masami Iseki, Fujio Kawano, Tatsuhito Goden

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Abstract

A displaying apparatus having a finer-pitch circuit constitution is provided without deteriorating a displaying quality and increasing each pixel size. In the displaying apparatus which can suppress a characteristic variation of a driving transistor included in each pixel circuit by using a control circuit, the control circuit is arranged on an outer side of a region in which the plurality of pixel circuits are arranged, and there are a second capacitor in which an input data signal is supplied to one end thereof, a first voltage follower circuit of which an input is connected to the other end of the second capacitor and of which an output is connectable to a data line, and a second voltage follower circuit of which an input is connected to the data line and of which an output is connectable to the other end of the second capacitor.

Claims6

Dependent claims

A displaying apparatus which comprises a plurality of pixel circuits, a data line configured to supply a voltage to the plurality of pixel circuits, and a control circuit connected to the data line, wherein

each of the plurality of pixel circuits includes a light emitting device, a driving transistor configured to supply to the light emitting device a current according to the voltage applied to a gate electrode thereof, a first capacitor of which one end is connected to the gate electrode of the driving transistor, a first switch transistor configured to control conduction between the gate electrode of the driving transistor and the data line, and a second switch transistor configured to control conduction between a drain electrode of the driving transistor and the data line, and
the control circuit is arranged on an outer side of a region in which the plurality of pixel circuits are arranged, and the control circuit includes a second capacitor in which an input data signal is supplied to one end thereof, a first voltage follower circuit of which an input is connected to the other end of the second capacitor and of which an output is connectable to the data line, and a second voltage follower circuit of which an input is connected to the data line and of which an output is connectable to the other end of the second capacitor.

Dependencies are inferred from the claim text.

Facts

Application: 13/709,500Filed 10 Dec 2012
Priority: JP 2011-27884420 Dec 2011
Published: 20 Jun 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

G09G 3/32
Using electroluminescent panels: semiconductive, e.g. using light-emitting diodes [LED]
G09G 3/3233
Using an active matrix: with pixel circuitry controlling the current through the light-emitting element
G09G 5/00
Control arrangements or circuits for visual indicators common to cathode-ray tube indicators
G09G 3/3291
Details of drivers for data electrodes: in which the data driver supplies a variable data voltage for setting the current through, or the voltage…

Family

US 8,847,934 B2Related patent
US 2013/0155038 A1This patent

From the US filing history. Foreign family members aren’t listed.

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