摘要:
The electro-optic device includes a plurality of data lines, a plurality of scan lines, a plurality of pixel areas arranged at crossings of the data lines and the scan lines, and light emitting elements, wherein first pixel areas are in alternating columns, each first pixel area including only one pixel circuit configured to cause the light emitting elements to emit light, wherein second pixel areas are in alternating columns between the first pixel areas, each second pixel area including two pixel circuits configured to cause the light emitting elements to emit light, and wherein a writing process is performed on the second pixel areas to cause light emitting elements on the pixel circuits on one side to emit light in a period for causing light emitting elements on the pixel circuits on the other side to emit light.
摘要:
A scan driver includes: a plurality of scan driving blocks including an output terminal outputting a scan signal to a scan line; a first transistor transmitting a voltage of a power source to the output terminal; a second transistor transmitting a clock signal to the output terminal; and a third transistor including a gate electrode connected to a node formed with a gate-on voltage turning on the second transistor, one terminal connected to the power source, and the other terminal connected to the gate electrode of the first transistor. The scan driver may reduce the influence of a leakage current even though application of the scan signal is increased, and a scan signal of a uniform voltage level may be output.
摘要:
An organic electroluminescent display supplies a reverse bias voltage to an Organic Light-Emitting Diode (OLED) for emitting light. The organic electroluminescent display additionally includes a reverse bias transistor to supply the reverse bias voltage. The reverse bias transistor is connected between an anode of the OLED and a reverse bias power supply, between the anode of the OLED and a first power line supplying a positive source voltage, or between the anode of the OLED and a data line. Furthermore, the reverse bias transistor can be connected between an initialization line and the anode of the OLED. The reverse bias voltage is supplied to the OLED before displaying an image or within a non-display period of a vertical synchronous signal, thereby enabling detection of whether or not the OLED has a defect.
摘要:
An active matrix type electroluminescence display device comprises a plurality of display pixels GS11, GS12, GS13, etc. arranged in a matrix of rows and columns, each display pixel including an EL element, a first thin film transistor in which a display signal is applied to the drain and which is switched on and off in response to a select signal, a capacitance with one end connected to the source of the first thin film transistor for maintaining a voltage corresponding to the display signal, and a second thin film transistor for driving the EL element based on the display signal. The other ends of the capacitance of row display pixels are connected to and shared by a plurality of first capacitance lines HLA1, HLA2, HLA3, HLAi. Both ends of the plurality of first capacitance lines HLA1, HLA2, HLA3 are connected to and shared by second capacitance lines HLB1 and HLB2. A constant voltage is supplied to the second capacitance line.
摘要:
Powder desiccant is mixed into a seal which adheres a first substrate to a second substrate, thereby sealing a display region. Almost no moisture permeates through the outer surfaces of the substrates sandwiching the display region, while moisture permeating through the seal is adsorbed by the desiccant. An emissive layer is thereby prevented from deterioration due to moisture. By covering the display region with a resin sealing layer composed of resin having desiccant mixed therein, the display region can reliably be protected from moisture. By forming a groove in the substrate and placing a desiccant therein, moisture can be further reliably adsorbed.
摘要:
A current control circuit is provided between a power source circuit and a power source line VL which supplies a drive current to an organic EL element provided in each emissive pixel of a display panel. An amount of current flowing from the power source circuit to the power source line VL is detected, and when the amount of current increases, a power source voltage Vdd to be applied to the power source line VL is decreased, thereby decreasing a current flowing thorough the organic EL element. Alternatively, contrast or brightness level of display data to be supplied to each EL element is controlled in accordance with the detected amount of current, so that when the current amount increases, the contrast or brightness level is reduced thereby restricting a current flowing through the organic EL element. Thus, the amount of current flowing through the organic EL element can be restricted to thereby prevent excessive power consumption of the display device.
摘要:
In a display device including, for each pixel, an organic EL element (60) and TFTs (30, 40) for controlling the element, a sequential circuit (350) is provided for stopping supply of power source voltages Vvdd and Hvdd to drivers (80, 90) for driving the TFTs (30, 40) which control each organic EL element (60) after stopping supply of power source voltage Pvdd to the organic EL element (60) when the device is turned off.
摘要:
The emitted luminance of an EL device is controlled in an analog manner so as to realize a multiple gray-scale display by employing a first TFT (101) for switching, which turns on and off according to a selection signal SCAN1, and a second TFT (104) for driving an EL device (103) having an emissive layer between a pair of electrodes, by providing an analog switch (31) for sampling an analog video signal (VIDEO) at a predetermined period and a capacitor (102) for holding a sampling voltage from the analog switch (31), and by applying the analog voltage held in the capacitor (102) to the gate of the second TFT.
摘要:
There are provided a data register (8) for driving an EL element (6) by a current flowing in a data line (3) via a TFT (5) while sequentially capturing input digital video data for each data line, a latch circuit (10) for holding the data received in the data register (8) during 1 H period, and n analog switches (120 to 123) provided between each data line (3) and a power supply line (11), to which n bit of digital video data for each one data line is input bit by bit as each control signal. The transistors constituting each switch are made different sizes. As the current amount flowing in each switch therefore differs, the EL element emits light with a luminance in accordance with the digital video data.
摘要:
An organic EL display device comprises a first TFT (30), which is a switching TFT, an organic EL element driving TFT, and an organic EL element (60) having an anode (61), a cathode (66), and an emissive element layer (65) interposed between both electrodes. The EL element driving TFT comprises a second and third TFTs (35, 40) connected in parallel. Because electrical current to the organic EL element (60) is supplied from a plurality of TFTs (35, 40), variation in the total current value can be suppressed to therefore reduce the variation in luminance, even when characteristics vary among the TFTs driving the organic EL element.