A method for controlling a digital display device of a head or helmet-mounted display system and a head or helmet-mounted digital display system implementing the method are provided with the aim of controlling the display device in such a way as to reduce the effect of dynamic false contouring on the quality of a displayed image. According to the method, received image data defining brightness levels according to a scheme of light pulse modulation based upon binary-weighted pulse durations are converted into a data defining a sequence of pulses of binary and non-binary weighted duration in which the highest value weighting represents a pulse of a duration less than half the total duration of illumination required during an image refresh period to achieve a pixel at the highest brightness level. In a further embodiment, the weighting of highest value represents a pulse of duration less than one quarter of the duration required for highest pixel brightness.

A method is provided for reducing flicker arising in pixels along an axis of a liquid-crystal based array such as a LCoS array. The pixels along the axis exhibit a common gray scale level. In accordance with the method, a plurality of digital data command sequences are selected that each drive a pixel at the common gray scale level. A first of the plurality of digital data command sequences is applied to a first pixel along the axis. A second of the plurality of digital data command sequences is applied to a second pixel along the axis. The second pixel is adjacent to the first pixel. The first and second digital command sequences give rise to voltages being applied to the two pixels which have frequency components that are opposite in phase and equal in magnitude.

A method of driving a display panel includes dividing an input image into a plurality of segments; generating flicker levels of respective ones of the segments; determining a frame rate of the display panel based on the flicker levels of the segments; and outputting a data voltage to the display panel at the frame rate.

A method of driving an organic light emitting display, the method including supplying a data signal of an i-th (i is a natural number) frame corresponding to a scan signal non-sequentially supplied during a first period in an i-th frame period, and supplying a data signal of (i+1)-th frame corresponding to a scan signal non-sequentially supplied during a second period, which is different from the first period, in the i-th frame period.

This disclosure provides systems, methods, apparatus, and computer readable media for generating images on a display using a dithering process that takes into account an uneven spacing of available gray scale values in at least one color subfield used to generate the images. The dithering process includes generating a set of initial color subfields, a set of quantized color subfields, and a set of final color subfields, which are then output on the display. The quantized color subfields an the final color subfields are derived based at least in part on the uneven spacing of gray scale values in at least one of the final color subfields.

A method of driving a display panel includes dividing an input image into a plurality of segments; generating flicker levels of respective ones of the segments; determining a frame rate of the display panel based on the flicker levels of the segments; and outputting a data voltage to the display panel at the frame rate.

The liquid crystal drive apparatus controls application of a first or second voltage to each pixel of a liquid crystal element in respective multiple sub-frame periods included in one frame period to cause that pixel to form a tone. The sub-frame period where the first voltage is applied to the pixel is referred to as an ON period, and the sub-frame period where the second voltage is applied to the pixel is referred to as an OFF period. The apparatus provide, when causing the pixel to form the tone using the ON period, multiple ON period sets separately from each other in the one frame period. Each ON period set includes one or more ON periods. The apparatus sets a temporal interval between temporal centers of the respective ON period sets to 60% or less of the one frame period or to 5.0 ms or less.

The liquid crystal drive apparatus controls application of a first or second voltage to each pixel of a liquid crystal element in respective sub-frame periods in one frame period to cause that pixel to form a tone. The sub-frame period where the first voltage is applied to the pixel is referred to as an ON period, the sub-frame period where the second voltage is applied to the pixel is referred to as an OFF period. The sub-frame period corresponding to the ON and OFF periods respectively for first and second pixels of two mutually adjacent pixels is referred to as an ON/OFF adjacent period. The apparatus provides, when causing the first and second pixels to form tones adjacent to each other, a plurality of the ON/OFF adjacent periods each being 1.0 ms or less separately from each other in the one frame period.

The present disclosure pertains to a method for designing cascaded bit sequences for cascaded digital displays. The method avoids unwanted interactions between cascaded sequences in cascaded digital displays. By using sequences with a particular structure, cascaded sequences can be designed such that no sequence is affected by the others. The following rules must be followed in constructing the sequence. First, the display devices must be frame-locked, so that the timing relationship between the sequences is maintained throughout each frame. Second, for each display device, the ratio of bit plane weights must remain constant, regardless of the pixel data displayed on the other display device(s). Third, the amount of bit plane skew must remain constant, regardless of the pixel data displayed on the other display device(s). Fourth, bit plane phased leakage must be compensated for or avoided.

A method of driving a display panel includes dividing an input image into a plurality of segments; generating flicker levels of respective ones of the segments; determining a frame rate of the display panel based on the flicker levels of the segments; and outputting a data voltage to the display panel at the frame rate.