Abstract:
PROBLEM TO BE SOLVED: To provide a display device that reduces flicker, and has a first transistor whose drain is connected to a pixel electrode and source is connected to a source bus, and that controls applied voltage of the pixel electrode according to gate voltage, an electronic device, and an electronic system. SOLUTION: The display device includes the pixel electrode, a transistor for pixel driving whose drain is connected to the pixel electrode and source is connected to a source bus and that controls voltage applied to the pixel electrode according to the gate voltage applied to a gate, a capacitance that is connected to the gate of the transistor for pixel driving and holds voltage applied to the gate of the transistor, and a transistor for gate drive voltage control whose source is connected to the source bus and gate is connected to a gate line and that controls applied voltage of the capacitance. The capacitance voltage is alternately changed so as to become a different voltage between adjacent source buses. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a transient control drive method and circuit of pixels, which improves, in a liquid crystal display, the switching behavior of the pixels and limits the increase in a column drive voltage to improve the power consumption of pixels. SOLUTION: In the transient control drive method, a pixel circuit includes a liquid crystal capacitor, a storage capacitor electrically coupled to the liquid crystal capacitor, and a switch device. The transient control drive method, for driving the liquid crystal capacitor of the pixel circuit from a first voltage level to a second voltage level, comprises: a step of driving the liquid crystal capacitor from the first voltage level to an intermediate voltage level; and a step of driving the liquid crystal capacitor from the intermediate voltage level to the second voltage level by charge sharing with the storage capacitor. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a liquid crystal display preventing a rough surface (domain) of image display from being generated even when external pressure is applied locally onto a display panel, eliminating quickly the domain, securing a high numerical aperture even in the display panel of high resolution, and displaying a bright and beautiful image. SOLUTION: This liquid crystal display is provided with a first transparent substrate, a lower electrode formed on the first transparent substrate, and applied with a prescribed potential; an insulating layer formed on the lower electrode; a plurality of pixel electrodes arranged in a matrix on the insulating layer; a second transparent substrate facing the first transparent substrate; counter electrodes formed to face the pixel electrodes, and applied with the potential equal to the prescribed potential; and a liquid crystal molecule aligned in a liquid crystal sealed between the first transparent substrate and the second transparent substrate. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a liquid crystal display device having an overdrive function for improving moving image performances without requiring an external memory. SOLUTION: The display device has a pixel unit where display pixels are arranged in a matrix, each pixel including a first holding means (33) holding a first physical quantity for previous write, a second holding means (31, 32) holding a second physical quantity for current write, a comparison means (23a, 23b) comparing the physical quantities held by the first and second holding means, and a pixel voltage changing means (24, 34) for changing a pixel voltage based on the comparison result by the comparing means, wherein the holding means is provided inside the pixel, to store a voltage applied in the preceding frame, to compare the stored voltage to the voltage applied in the current frame, to store the difference, and to perform overdrive as required in accordance with a moving image or a still image, so that the moving image performance can be improved without providing an external memory. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a precharge circuit of a liquid crystal display device in which unnecessary power consumption is suppressed without requiring a specific precharge power supply, and by which a stable image is obtained even at starting time. SOLUTION: The precharge circuit comprises: a first thin film transistor 11 of a first conductive type, in which a drain terminal is connected to a power supply Vdd; a second thin film transistor 12 of a second conductive type, in which a drain terminal is connected to GND, and a source terminal is connected to the source terminal of the first thin film transistor and a common output terminal 18; a capacitive element 19 which is connected between the output terminal and the GND; and bias voltage apply control means 15, 16 and 17 in which a first bias voltage is applied to the gate terminal of the first thin film transistor, and a second bias voltage to the gate terminal of the second thing film transistor, respectively, so that the first thin film transistor and the second thin film transistor may not be switched on at the same time, and an output voltage value at the output terminal may be set to a middle point of the power supply voltage and the GND voltage. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
A pixel circuit comprises an organic light emitting diode (OLED), and a static memory for storing data that represents an operational state of the OLED. In alternative embodiments, a pixel circuit may include a complimentary metal oxide semiconductor (CMOS) circuit for controlling the OLED, a protection circuit for protecting the CMOS circuit from an over-voltage condition, and a current source with a field effect transistor (FET) having a static gate to source voltage that is greater than a threshold voltage of the FET.
Abstract:
The present invention relates to a method of driving a display comprising: - receiving grey level input data, comprising a subpixel input data consisting of N bits, from an external image data source; - mapping the L upper bits of the N-bit subpixel input data to an L-bit first mapped data, where L≤(N-1); - generating an additional bit of mapped data; - using the lower N-L bits of said N-bit subpixel input data for a control operation; including providing a driver data consisting of L+l bits, based on the first mapped data and the additional bit of mapped data, to a driver circuit; and - controlling the driver circuit to output driving voltages set in relation to the driver data, to a display element, wherein the total number of voltage levels correspond to the maximum value representable by the L bits, plus one. The control operation further comprises, performing frame mixing comprising providing said driver data as either representing said first mapped data or an increment thereof. The additional bit is, inter alia, used to enable representation of said increment.
Abstract:
A display device with touch sensor input has a touch sensor structure (16,18,20,22) having a first and second array of electrodes (18,22). The first and second arrays of electrodes occupy different fractions of a touch sensor area. These asymmetric fill factors give improved sensitivity.