Citizen Finetech Miyota Co., Ltd

Micron Technology Incorporated

Other

Displaytech, Inc.

Michael Wayne Yee

James Dallas

Per Harold Larsen

Rainer M Malzbender

David B Hollenbeck

Earle R Vickery, Iii

Mark A Handschy

Earl R Vickery, Iii

Bruce C Gamache

A controller and method have been described for use in conjunction with a sequential display system including a display having a plurality of pixels. A series of update cycles is performed on the display to establish the grayscale value of each pixel for viewing on the display based on the pixel values for a video frame by selectively switching each pixel responsive to the update cycles such that a total number of the update cycles is less than the total number of pixel values of the frame. Statistical characterization of frame data can be the basis of the reduction of the number of update cycles.

Apparatus and associated methods for dynamic sequential display update

A device, system and method of playing back a digital audio stream wherein large amounts of pre-emphasis of the high frequencies is applied before the digital to analog conversion and before an interpolation or digital filter, followed by de-emphasis in the analog domain in order to yield better audio fidelity.

Method, system and apparatus for improving the sonic quality of an audio signal

Drive voltages of a liquid crystal display are adjusted based on one or more environmental conditions. The pixel drive voltages may be adjusted based on temperature. A pixel voltage may be varied such that it is a higher voltage at relatively lower temperatures and a lower voltage at relatively higher temperatures. The window voltage may be varied based on temperature. The window voltage may be stepped through different values within a display phase. The window voltage may be varied during a blanking period of the display phase such that the pixel sees a relatively larger voltage to obtain a desired initial state more quickly. Then, during a light modulating time period, the window voltage may be stepped such that there is a lower voltage field for holding the state of the pixel.

Adjustment of liquid crystal display voltage

Methods and devices for generating grayscale using digital pulse width modulation between optical states. Grayscale may be generated for each component color using multiple algorithm cycles per display field. Subsets of binary weighted bit values for data values of each component color may be split across algorithm cycles to reduce the number of data comparisons per color per display field. The total number of data comparisons per color per display field may be reduced by half or more.

Digital gray scale methods and devices

A gamma variation of image intensity is created by varying the illumination intensity during a pulse width modulated display time period. During the pulse width modulated display time period a ramp signal may be compared with the image data to determine when pixel electrodes of the pixel array are switched. The illumination intensity may be varied in concert with ramp signal to produce a quadratic variation of displayed intensity on image data value. The illumination source could be an LED illumination source and intensity of the LED illumination source could be controlled using pulse width modulation.

Gamma variation using illumination intensity

A microdisplay having interface circuitry on the same silicon backplane to allow it to receive digital images and video in a variety of formats and convert same to field sequential color signals for generation of full color images. It includes column data processors having a comparator for each block of N-columns of pixels. Image data is double-buffered in SRAM memory cells located beneath the pixel electrodes, but not within each pixel. The stored data is logically associated with each pixel via the column data processors. Image compression is accomplished by converting RGB data to a variant of YUV data and sampling the color components of the converted data less frequently than the luminance components. The SRAM image buffer consumes a reduced amount of power. A temperature compensation scheme allows the temperature of the microdisplay to be sensed and the drive voltage to the pixel electrodes to be varied in response thereto.

Growing community of inventors

Boulder, CO, United States of America

Michael Wayne Yee