Described are various embodiments of a light field device, optical aberration compensation or simulation rendering method and vision testing system using same. In one embodiment, the device comprises a digital display comprising a set of pixels; an array of light field shaping elements (LFSE) disposed relative to the set of pixels so to at least partially govern a light field emanated thereby; and a digital processor operable to: receive as input one or more higher order aberration parameters digitally defining a higher order aberration; for each given pixel, identify an adjusted image plane location corresponding thereto given a corresponding LFSE corresponding thereto and given said one or more higher order aberration parameters, and associate therewith an adjusted image value designated for the adjusted image location; and render for each said given pixel said adjusted image value associated therewith.

Described are various embodiments of a light field vision-based testing device, system and method. One such device comprises an array of digital display pixels; a corresponding array of light field shaping elements (LFSEs); a hardware processor operable to adjust perception of a defined optotype within a range of visual acuity compensations; and an adjustable refractive optical system adjustable to selectively produce a complementary visual acuity compensation to extend each of a cylindrical compensation range and a spherical compensation range.

Described are various embodiments of a light field device and vision-based testing system using same. Different embodiments provide for a vision-based testing device comprising a one or more view zone optimization techniques such as, but not limited to, a predominant view zone isolator, a view zone output realignment solution, and a coarse view zone adjustment transfer solution, as well as other view zone artefact reduction techniques and multi-depth perception adjustment techniques.

A verifiable display is provided that enables the visual content of the display to be detected and confirmed in a variety of ambient lighting conditions, enviroments, and operational states. In particular, the verifiable display has a display layer that is capable of visually setting an intended message for human or machine reading, with the intendended message being set using pixels. Depending on the operational condition of the display and the ambient light, for example, the message that is actually displayed and perceivable may vary from the intended message. To detect what message is actually displayed, a light detection layer in the verifiable display detects the illumination state of the pixels, and in that way is able to detect what message is actually being presented by the display layer.

A verifiable display is provided that enables the visual content of the display to be detected and confirmed in a variety of ambient lighting conditions, enviroments, and operational states. In particular, the verifiable display has a display layer that is capable of visually setting an intended message for human or machine reading, with the intendended message being set using pixels. Depending on the operational condition of the display and the ambient light, for example, the message that is actually displayed and perceivable may vary from the intended message. To detect what message is actually displayed, a light detection layer in the verifiable display detects the illumination state of the pixels, and in that way is able to detect what message is actually being presented by the display layer.

A display apparatus includes a flexible display part expressing images, a housing accommodating the display part, the display part being drawn into and out of the housing, a revolving part in the housing, the display part being wound on the revolving part in a predetermined rotation direction, a fixing part in the housing, the fixing part securing the display part when fully spread out, and a pressing part connected to an interior of the housing, the pressing part pressing the fixing part toward the revolving part.

In the use of a display of a converter, method for operating a converter, and converter, the converter having an address code switch, in particular on its housing, and in an actuation of the address code switch and during a subsequent, predefined period of time, a respective value corresponding to the respective switch position of the address code switch is displayed by the display. Operating information of the converter is displayed in all other cases.

In the use of a display of a converter, method for operating a converter, and converter, the converter having an address code switch, in particular on its housing, and in an actuation of the address code switch and during a subsequent, predefined period of time, a respective value corresponding to the respective switch position of the address code switch is displayed by the display. Operating information of the converter is displayed in all other cases.

A flat self-luminous touch switch, including: a self-luminous touch unit, including at least one flat self-luminous pixel and a pixel driving interface; and a switch control unit, including a first driving interface and a second driving interface, wherein, the first driving interface is coupled with the pixel driving interface to provide at least one pixel driving signal and transmit a touch detection signal; and the second driving interface provides an analog switch channel and/or at least one digital output signal according to a detection result of the touch detection signal.

The current disclosure provides an LED display control circuit. The control circuit has a device configured to separate a first PWM data into LSB data and MSB data. The control circuit also comprises a LSB circuit coupled to a plurality of LED channels. The LSB circuit is configured to supply LSB data to each of the plurality of LED channels.