摘要:
An active matrix liquid crystal display (AMLCD) and driving method is disclosed. The AMLCD has matrix-arranged pixel assemblies each having display electrodes. A gate line for carrying gate line pulses is connected to a control port of a row of semiconductor devices, which may be thin film transistors (TFTs). Each TFT has an output port connected to the display electrodes. In addition, a data line is connected to an input port of a column of the TFTs. A bootstrap line is capacitively connected to the display electrodes of adjacent rows. This reduce the number of bootstrap lines to half the number of gate and data lines. A bootstrap pulse timing and generating circuit is connected to the bootstrap line to provide a bootstrap pulse that shifts voltages on the display electrodes in only one direction. The bootstrap pulse has a first edge of a first polarity occurring before or during gate pulses carried on a gate line, and a second edge of a second polarity occurring after the gate line pulses.
摘要:
A pixel circuit includes a light emitting device, a storage device configured to represent a level of illumination, and a driving device used to drive the light emitting device. Configuring the storage device includes changing a voltage difference across the storage device to a level larger than a threshold voltage of the driving device. The driving device reduces driving of the light emitting device while the storage device is being configured. After the storage device has been configured, the driving device is permitted to drive the light emitting device to emit light having a luminance level corresponding to the level of illumination represented by the storage device.
摘要:
There is provided a method for driving an organic light emitting diode (OLED) pixel circuit. The method includes applying a first signal to a terminal of the OLED when setting a state of the pixel circuit, and applying a second signal to the terminal when viewing the state. There is also provided a driver for an OLED pixel circuit, where the driver employs this method.
摘要:
An active matrix display includes a plurality of pixels arranged in an array, a first transistor and a second transistor associated with each pixel, the first and second transistors positioned within the array for controlling current flow through each pixel, a light emitting diode associated with each pixel; and a storage capacitor associated with each pixel, wherein, during a time period for establishment of a threshold voltage on the storage capacitor for the first transistor, a voltage equal to the sum of the threshold voltage and a voltage for compensating for turnoff of the second transistor is established on the storage capacitor.
摘要:
The elimination of crosstalk between data lines and pixel cells in a thin film transistor/liquid crystal display is accomplished by applying a precharge voltage level for a given data signal level which also provides an equivalent to a compensation voltage for a prior scan line to a given data line for a time period less than the standard scan line period of the display, and applying the data signal to the given data line for the remainder of the scan line period.
摘要:
The elimination of crosstalk between data lines and pixel cells in a thin film transistor/liquid crystal display is accomplished by applying a precharge voltage level for a given data signal level which also provides an equivalent to a compensation voltage for a prior scan line to a given data line for a time period less than the standard scan line period of the display, and applying the data signal to the given data line for the remainder of the scan line period.
摘要:
A device for use in a display system including an array of pixel cells formed on a substrate. Each pixel cell being coupled to at least one gate line of a plurality of gate lines formed on the substrate and at least one data line of a plurality of data lines being formed on the substrate. The device includes first and second transistors formed on the substrate. Each transistor has a gate electrode and first and second electrodes defining a serpentine channel region there between voltage applied to the gate electrode controls conductivity of the channel region. Preferably, a common electrode includes one of the first and second electrodes of the first transistor and one of the first and second electrodes of the second transistor. The first and second transistors are preferably coupled between a gate line (or data line) and respective probe pads formed on the substrate and selectively couple the respective probe pad to the gate line (or data line) during a test routine whereby charge is written to, stored, and read from the array of pixel cells.
摘要:
A photonic waveguide structure includes a first photonic waveguide layer located over a substrate. A sidewall cladding layer is located cladding a sidewall, but not covering a top, of the first photonic waveguide layer. A second photonic waveguide layer may be located upon the top of the sidewall cladding layer while contacting, but not straddling, the first photonic waveguide layer. The sidewall cladding layer protects the first photonic waveguide layer from environmental exposure, thus providing enhanced performance of a photonic waveguide structure. A planarizing sidewall cladding layer allows the fabrication of optical chips with multiple layers of lithographically defined devices.
摘要:
There is provided a display apparatus. The apparatus includes (1) a substrate, (2) a display element disposed on the substrate, the display element having (a) a first electrical conductor, (b) a second electrical conductor, and (c) a light switching material disposed between the first electrical conductor and the second electrical conductor, and (3) a via through the substrate for electrically coupling a signal to the first electrical conductor.
摘要:
An improved apparatus for testing an array of pixel cells formed on a substrate is provided. Each pixel cell is coupled to at least one gate line of a plurality of gate lines formed on the substrate and at least one data line of a plurality of data lines formed on the substrate. The gate lines and/or data lines are partitioned into a plurality of groups. For each particular group, a first probe pad and select logic is formed on said substrate. The select logic, which is coupled between the first probe pad and the lines of the particular group, selectively couples the first probe pad to the lines of said particular group based upon first control signals supplied to the select logic during a test routine whereby charge is written to, stored, and read from the array of pixel cells. In addition, a second probe pad and hold logic for each particular group may be formed on the substrate. The hold logic, which is coupled between the second probe pad and the lines of the particular group, selectively couples the second probe pad to the lines of the particular group based upon second control signals supplied to the hold logic during the test routine. The apparatus provides a flexible interface between the array under test and the test system, which minimizes the redesign costs when the size and/or resolution of the array under test is varied.