Abstract:
This drive circuit is provided with: pixel circuits; n data lines (where n is an integer of two or more) provided correspondingly for the pixel circuits of each column; gate lines to which scanning signals are supplied; and light emission control lines to which light emission control signals are supplied. The pixel circuits of a plurality of rows are exclusively connected to each n data lines provided correspondingly to the pixel circuits of each column. Each pixel circuit comprises: a write control transistor that controls the writing of a data voltage according to the scanning signal; a drive transistor that controls the amount of current to be supplied to a current light-emitting element; a light emission control transistor that controls whether or not current is supplied to the current light-emitting element according to the light emission control signal; a capacitive element that holds a voltage corresponding to the data voltage; and a reset transistor for setting a gate electrode of the drive transistor to an initial voltage.
Abstract:
A pixel driver circuit is provided for active matrix driving of an organic light emitting diode (OLED). The pixel circuit is characterised by comprising a drive transistor having a current path connected to a first voltage supply line at one end and to an OLED at the other end and a gate terminal connected to a storage element connected between gate and source of the drive transistor to memorise a drive signal for the drive transistor under the control of a first switch transistor having a gate connection to a first selection line and a current path connected between gate and drain of the drive transistor; a second switch transistor having a gate connection to a second selection line, wherein the second switch transistor has a current path connected to the data line at one end and a node at the other end located between the drive transistor and the OLED.
Abstract:
Pixel circuits and drive scheme leading to two-transistor solutions for operating active matrix light emitting device display in current-control mode are provided. Furthermore, preferred embodiment in common cathode configuration with N-channel drive transistor operated in current drive mode is provided.
Abstract:
An active matrix type display device includes array having pixel circuits arranged in rows and columns matrix form, each pixel circuit includes a current-driven diode type light-emitting element and a plurality of thin-film transistor for controlling the diode type light-emitting element; a data line provided for each column of the matrix for supplying a data signal to the pixel circuits on the corresponding column; data driver for controlling the supply of the data signal to the data line; a gate line provided for each row of the matrix for supplying a selection signal to pixel circuits on the corresponding row; a gate driver for supplying a selection signal to the gate line; and a control circuit for controlling the data driver and gate driver, wherein the data driver switches a plurality of sets of video signals alternately and supplies the video signals to the data line.