212 results about "Persistence of vision" patented technology

An automatic power-generation light-image fan device is described. It has a fan motor, a vane set, a circuit board, a programmable chip, an automatic power-generation component, a rectifier filter circuit, a magnetic sensor and a positioning magnet. In this device, the circuit board is mounted on the vanes of the vane set and also has plural light-emitting elements, which are respectively connected to I / O terminals of the programmable chip, and an accommodating room is mounted on an inner surface of the vane set, in which an inner circular surface of the accommodating room is circularly mounted by an inductance coil whose ends are connected to an input terminal of the rectifier filter circuit. Thereby, the light-emitting elements mounted on the fan can be controlled to generate various different twinkling light-image variations and an effect of persistence of vision when the fan motor is rotating.

A rotational light emitting display apparatus is provided. The rotational light emitting apparatus device allows static and animated images and instruments to be displayed on dynamic screen. The display is refreshed repeatedly to take advantage of the persistence of vision property of the human eye. The illuminating element of the apparatus includes a plurality of light emitting elements arranged in a line. Display refreshing is accomplished by mounting the apparatus on a rotating object, so that the line of light emitting elements lies along a radial direction. In this way, each of the light emitting elements traverse a circular path, while being flashed on and off to produce the desired display.

A display apparatus is for mounting on a rotatable object. The display apparatus comprises: (a) a display array for displaying at least one display pattern; (b) a self-contained rotational speed sensor for sensing a rotational speed of the rotatable object, the self-contained rotational speed sensor being entirely mounted on the rotatable object; (c) a wireless receiver for receiving information from a signal source spaced from the rotatable object and, (d) a microprocessor for controlling the display array based on the rotational speed of the rotatable object to display the at least one display pattern using persistence of vision of a viewer.

The invention relates to a naked eye 3D (Three-Dimensional) display system, which aims to solve the technical problem that at present, a 3D image is observed, an auxiliary equipment or a 2D (Two-Dimensional) computer display screen are needed to display a rotating 2D image for expressing a 3D effect, so that the display has no the real 3D effect, and a 3D object can not be observed from multi angles. The system mainly comprises a display, an electromechanical control module, a display driving module and a computer, wherein the display adopts a rotatable LED (Light-emitting Diode) dot matrix screen, and rotates at a preset speed, the screen rotates to different positions to display different images, the image is actually the 'slices' of the 3D image, due to the persistence of vision, the slices of the image are quickly and continuously displayed in a 3D space to form the 3D image with the 3D effect, the LED dot matrix rotating screen is driven by the electromechanical control module to detect the position of the screen and carry out feedback, the display driving module is used for driving each pixel point on the LED dot matrix screen, and the computer is used for outputting a control and display signal. By utilizing the system, the display content is more intuitive and more real, and the system can be widely applied into lighting products, advertisement display, teaching aid, and the like.

The present invention relates to a camera (102) with strobe flash illumination (116) for capturing an image of an object (6), and to a document scanning system (101) and method of using such a camera (102) to capture an image of a document (6). The camera (102) comprises an image capture means, an objective lens (114) with a field of view (118) to image optical radiation (119) from an object plane (8) onto the image capture means (52), a strobe flash (116) for illuminating the object plane (8), electronic pulse circuitry to pulse the strobe flash (116) at a rate which is sufficiently quick that the illumination appears to a user of the camera (102) to be substantially steady owing to persistence of vision, and a shutter means (104) to synchronize the capture of one or more images by the image capture means, each image being captured with at least one pulse from the strobe flash. The shutter means (104) is adapted to capture images at a rate substantially below the rate at which the strobe flash (16, 116) is pulsed.

A linear array of red LEDs 10R is provided so as to extend in a direction substantially perpendicular to a direction in which a swing-type display device is swung, and a linear array of green LEDs 10G is further provided, the red LEDs 10R and green LEDs 10G being arranged in pairs of two. A CPU activates each of the red LEDs 10R and green LEDs 10G for a predetermined period to emit light in a luminance level in accordance with image data. As a result, an image corresponding to the image data is displayed in the trajectory of the swing due to persistence of vision. Thus, an image can be displayed in various colors.