摘要:
Rise time in matrix_LED displays is decreased by providing extra current via capacitive (37) of column electrodes (12) to a circuit (39) providing peak currents.
摘要:
In a current driver circuit that is applicable to an organic EL (electroluminescent) image display device, the current driver circuit is provided for reducing the influence of variation between transistors that constitute a current mirror circuit while using the current mirror circuit. In the current driver circuit, a third and fourth transistor that operate in a linear region (non-saturation region) are provided between the power supply line and the sources of a first and second transistor that constitute the current mirror circuit; whereby the influence of variations between the threshold voltages of the first and second transistors can be mitigated. The gates of the third and fourth transistors are connected to the gates of the first and second transistors, respectively.
摘要:
A display panel comprising a substrate, a fluorescence layer which is to be caused to emit light by electrons from a vacuum space, and an anode electrode which is to direct the electrons toward the fluorescence layer, wherein the anode electrode comprises a lower electrode and an upper electrode.
摘要:
An apparatus for driving a display panel having drive lines and capacitive light emitting elements. The apparatus sequentially selects one scanning line from the scanning lines every scanning period of input video data including a gradation level to specify a drive line corresponding to at least one capacitive light emitting element driven to emit light on the one scanning line in accordance with the input video data, generates a driving signal having a pulse width in accordance with the gradation level every scanning period, and applies the one capacitive light emitting element with a voltage equal to or higher than a light emission threshold voltage in a forward direction for a duration in which the driving signal is generated, through the one scanning line and the specified drive line, and applies the specified drive line with a predetermined potential in response to elimination of the driving signal to decrease the voltage applied to the one capacitive light emitting element in the forward direction to a voltage lower than the light emission threshold voltage.
摘要:
An electro-optical device comprises a scan-line drive circuit which supplies a scan signal to a plurality of scan lines for selecting one of the scan lines; a data-line drive circuit which supplies a data signal to a plurality of data lines; and a voltage transformation circuit which changes a voltage of the data signal supplied from the data-line drive circuit based on a distance between the data-line drive circuit and one of the scan lines which has been sequentially selected by the scan-line drive circuit.
摘要:
There is provided behind an optical modulation panel (101) which is not provided with a color filter a planar light source which is provided with EL elements (100R, 100G and 100B) with a built-in optical resonator structure adapted to emit light in red, green and blue and which are periodically arranged on a single glass substrate (103). Lights of different colors obtained by lighting the EL elements (100R, 100G and 100B) are modulated by an optical modulation panel (101) to obtain a color image.
摘要:
A method of driving an AMEL display. The AMEL display includes a pixel having a first transistor, a second transistor, a capacitor, and an organic light emitting diode (O-LED). A frame time interval for the invention includes at least a first sub-interval and a second sub-interval. The method includes the following steps. First, during the first sub-interval, apply a first pulse to the scan lines sequentially and apply corresponding data signals to the data lines. Next, during the second sub-interval, apply a second pulse to the scan lines sequentially so as to turn on the first transistors and apply a prevention signal to the data lines so as to turn off the corresponding second transistors.
摘要:
In a conventional EL display device, a general video signal (analog signal voltage) is sampled to be outputted to a source signal line and then inputted to a gate electrode of a driving TFT provided in each pixel. The drain current of the TFT is controlled to control the current flowing into an EL element, thereby adjusting the luminance. However, accurate gray scales cannot be obtained unless the video signal is converted before it is sampled and inputted to the source signal line since the drain current of the driving TFT does not correspond to the gate voltage of the driving TFT linearly. The invention solve this problem by converting an inputted analog signal voltage into a current, converting the current into the gate-source voltage of a correction TFT that has the same polarity as a driving TFT, supplying the gate-source voltage as a source line signal to a source signal line, and applying the source line signal to a gate electrode of the driving TFT. Thus an EL element can emit light at a luminance linearly corresponding to the inputted analog signal voltage.
摘要:
The object of the present invention is to provide an image display device capable of radiating over an image formed into a character with a uniform luminosity as a luminescent surface made according to the dot matrix system without increasing the number of components. To this end, the display device includes the first luminescent section having a prescribed area and the second luminescent section constituting a display with an area larger than that of the first luminescent section, wherein the first and the second luminescent sections include luminescent bodies radiating as electrons move and a pair of electrodes sandwiching these luminescent bodies, at least one of these electrodes determines the luminescent area thereof, and the second luminescent section is constituted by a plurality of divided electrodes.
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.