522 results about "Dark state" patented technology

Variable transmittance optical filters capable of transitioning from a light state to a dark state on exposure to UV radiation and from a dark state to a light state with application of an electric voltage are provided. The optical filters comprise a switching material that comprises one or more chromophores that have electrochromic and photochromic properties.

The invention relates to a transflective liquid crystal display device that has a high contrast ratio. The transflective liquid crystal panel includes a homogeneous liquid crystal such that the transflective liquid crystal display device will have an optical retardation when the voltage is applied. Therefore, in order to compensate the optical retardation caused by this liquid crystal, a thickness of the liquid crystal layer is adjusted. Moreover, a thickness of the retardation film is also adjusted. Accordingly, the complete dark state and the high contrast ratio are achieved in the liquid crystal display.

The present invention relates to an in-plane switching liquid crystal display comprising a negative biaxial retardation film and a positive C-plate, as viewing-angle compensation films. By the use of such viewing-angle compensation films, the contrast characteristics at the front side and inclination angle of the in-plane switching liquid crystal display can be improved and color shift with viewing angle in the dark state can be minimized.

The present invention provides a solid-state image pick-up device without shading in the dark state, and capable of making a dynamic range and a S / N high. Reference numeral 505 denotes an N-type cathode of a photodiode, 506 denoting a surface P-type region for forming the photodiode into an embedded structure, 508a denoting an N-type high concentration region which forms a floating diffusion and which is also a drain region of a transfer MOS transistor. Reference character 508b denotes a polysilicon lead-out electrode brought into direct contact with the N-type high concentration region. Light incident from the surface passes through an aperture without a metal third layer 525 to enter into the photodiode. Among incident lights, light reflected by the top surface of a gate electrode 504 of the transfer MOS transistor is reflected by a first layer metal 521 right above the polysilicon, so as to repeats reflection a plurality of times to attenuate sufficienly before entering into the floating diffusion section, thereby making the aliasing extremely small.

An apparatus and method for image pickup capable of reducing noise in the images to reduce the effect of shaking due to, for example, hand movement. The image pickup apparatus and method can employ an exposure photographing unit for photographing at least one exposure image at predetermined time intervals using time-division exposure in a light exposure state, a dark frame photographing unit for photographing at least one dark frame at predetermined time intervals using time-division exposure in a dark state, a subtracting processor for subtracting the dark frames from the exposure images to reduce noise in the exposure images, and an image combiner for combining the plurality of reduced noise exposure images.

The presently described embodiments comprise a system that includes a color changing medium, an erasing device using heat or long wavelength infrared light as the erasing source, a writing device that can imagewise apply a UV light to write the image on the media, and a transport to transport the media along a paper path to be seen by the erasing device and the writing device. The system could also function in an alternative way. The image could be “erased” to the all dark state using light (e.g. ultraviolet light) and then heated or illuminated using, for example, infrared light in imagewise fashion to produce the image.

There is provided a solid-state image pickup device including ADCs that can be arranged in a limited space. The potential of a pixel signal outputted through a vertical readout line is held at a node. A plurality of capacitors are capacitively coupled to the node at which the pixel signal is held. The potential of the node is decreased in a stepwise manner by sequentially switching the voltages of the counter electrodes of the capacitors by the control of transistors. A comparator compares the potential of the node with the potential of the dark state of the pixel, and determines the upper bits of a digital value when the potential of the node becomes lower than the potential of the dark state. Following this, the conversion of the lower bits of the digital value is started. Therefore, it is possible to simplify the configuration of each ADC and arrange each ADC in a limited space.

The present invention is directed to an alternative design of a multicolor display. The display device is capable of achieving high quality black and white states. The pixel electrodes and the microcups in the display device may be aligned only in one axis. In practice, a standard active matrix array may be used to drive the display device.

The invention relates to the technical field of liquid crystal display and discloses a color film substrate and a display device. For a display device with a transverse electric field as a driving electric field, when the black matrix of the color film substrate is located within the part of a non-display region, the black matrix is arranged to comprise a portion to be connected, and a preset voltage is applied to the black matrix by virtue of the portion to be connected to ensure that the differential pressure of the black matrix and a pixel electrode or the differential pressure of the black matrix and a common electrode during dark state display is low and not enough to drive liquid crystal molecules to deflect, and therefore, the poor greening phenomenon during dark state display is overcome and the yield and the display quality of the product are improved.

We describe a wide band variable transmission optical device, mixtures for use in such a device, and methods of making the same. The wide band optical device includes a cell comprising a guest-host mixture of a liquid crystal host and a dichroic guest dye material contained between a pair of plastic substrates. The optical device does not use polarizers. The liquid crystal host has an axis orientation that is alterable between a clear state orientation and a dark state orientation perpendicular thereto and the dichroic guest dye material includes one or more dichroic dyes. The optical device is characterized in that it exhibits a wide absorption band that is greater than 175nm within a visible wavelength range of 400-700nm and has a clear state transmission equal to or above 30% and a dark state transmission equal to or below 40%.

Disclosure is a method for asymmetrically aligning polarizer and rubbing axes of a fringe field switching liquid crystal display, which removes a ghost image and a rubbing mura, caused by an electric field applied to a panel under a low gray scale and dark state, by twisting an optical axis of a polarizer plate and rubbing optical axes of upper and lower plates. The Disclosure aligns polarizer and rubbing axes of a lower plate into which polarizing light is incident in such a manner that an angle formed between the polarizer and rubbing axes is a first predetermined angle and aligns polarizer and rubbing axes of an upper plate through which the polarizing light passes via a liquid crystal in such a manner that an angle formed between the polarizer and rubbing axes is a second predetermined angle.

A reflective projection display system for receiving a light ray and projecting it onto a screen in a light-state mode. The reflective projection display system includes a reflective micro-mirror panel, a projecting device and a prism set. Before reaching the reflective micro-mirror panel, the light ray is firstly reflected by the prism set. The light ray reflected by the reflective micro-mirror panel in the light-state mode directly passes through the prism set and is then received by the projection lens. The light ray reflected by the reflective micro-mirror panel in the dark-state mode is totally reflected at an interface between a prism adjacent to the reflective micro-mirror panel and an air gap adjacent to the prism.

Disclosure is a method for asymmetrically aligning polarizer and rubbing axes of a fringe field switching liquid crystal display, which removes a ghost image and a rubbing mura, caused by an electric field applied to a panel under a low gray scale and dark state, by twisting an optical axis of a polarizer plate and rubbing optical axes of upper and lower plates. The Disclosure aligns polarizer and rubbing axes of a lower plate into which polarizing light is incident in such a manner that an angle formed between the polarizer and rubbing axes is a first predetermined angle and aligns polarizer and rubbing axes of an upper plate through which the polarizing light passes via a liquid crystal in such a manner that an angle formed between the polarizer and rubbing axes is a second predetermined angle.

Variable transmittance optical filters capable of transitioning from a light state to a dark state on exposure to UV radiation and from a dark state to a light state with application of an electric voltage are provided. The optical filters comprise a switching material that comprises one or more chromophores that have electrochromic and photochromic properties.

A polarizer is used with a liquid crystal display (LCD) cell whose liquid crystal molecules are switched in the plane of the cell. The LCD has birefringent properties that are different from other types of LCD cell and, unlike other types of LCD, the image contrast is maintained and there is little color shift in the dark state when a low birefringence polarizer is used with the SIP LCD cell. In one embodiment, the x-z retardation of the layers between the polarization-sensitive absorbing layer and the LCD is less than 20 nm. In another embodiment, the x-z birefringence is less than 0.0005. The low levels of retardation and birefringence may be achieved by omitting the commonly used cellulose triacetate layer between the polarization-sensitive absorbing layer and the LCD.

Image data are obtained by photographing a target image containing fixed pattern noise and a noise image photographed in a dark state and having recorded therein position information indicating the position of the fixed pattern noise are obtained. The position of each pixel indicating a color information value equal to or greater than a threshold value is extracted from the noise image and the color information at the pixel at the corresponding position in the target image is substituted with a median value of color information values at surrounding pixels so as to eliminate the fixed pattern noise from the target image.

Provided is a dimming helmet visor incorporating optical shutter technology therein for instantaneous conversion from a clear state to a dark state and vice versa. These visors find utility in helmets for anyone in changing lighting conditions outdoors, especially motorcyclists. The visor's optical shutter display is connected to a photodiode and a battery with both automatic and manual adjustment functionalities. A manual on / off switch is provided for power management. The photodiode responds to light intensity above a certain threshold and switches from a clear state to dark state in a matter of milliseconds once this threshold is reached.

The invention discloses a display panel, a display device and a driving method thereof.A view angle control electrode is arranged on a second substrate (color filter substrate) of the display panel, and voltage is applied on the view angle control electrode when a narrow view angle is needed, so that an electric field perpendicular to the display panel is generated between the view angle control electrode, a pixel electrode arranged on a first substrate (array substrate) and a common electrode, liquid crystal molecules have dip angle changes in the vertical direction, and the purposes of squint dark state light leakage, contrast decrease, view angle narrowing and narrow-view-angle display are achieved.Therefore, the wide-view-angle mode and the narrow-view-angle mode can be switched by adjusting the voltage applied on the view control voltage.

A protective automatic darkening filter (ADF) and an associated tool, such as a welding torch, are controlled by a corresponding communication unit. The invention helps to ensure that the tool is not activated before the ADF has reached its dark state. A communication channel between the communication unit and the ADF may be established using a wired or wireless medium.

To prevent such a situation that a signal from a pixel in a dark state is output at a level shifted from an originally set level to deteriorate an image quality, and to improve the image quality. A photoelectric conversion apparatus according to the present invention includes: a plurality of photoelectric conversion elements; a plurality of amplifying units for amplifying a signal in accordance with a photo-carrier generated in the photoelectric conversion elements; a plurality of signal holding units for holding output signals from the amplifying units through a plurality of switch units; and a control signal supplying unit for supplying a control signal to the switch units through a control line, in which the control line is sequentially connected to the plurality of switch units and has both ends connected to the control signal supplying units, or a change rate with time of an amplitude of a signal held by the signal holding units is set lower than a change rate with time of am amplitude of the control signal at the time of turning off the switch units.

The present invention relates to the field of display technology, in particular to a liquid crystal display panel and a display device, which are used to solve the problem in the prior art that the pixel structure corresponding to the improved FFS display mode generates light leakage in a dark state. By arranging a shielding electrode between the opposite substrate and the array substrate, and the orthographic projection of the shielding electrode on the array substrate at least covers the data line of the array substrate, and the voltage signal of the shielding electrode is the same as the voltage signal of the common electrode, so The shielding electrode can offset or shield the electric field generated by part of the pixel electrodes (and the common electrode) and the data lines, and shield the data lines, thereby effectively improving the light leakage problem.

A vehicle lighting device is provided with a pair of lamps arranged on right and left sides of a front part of a vehicle. Illumination light beams emitted from the pair of lamps are overlapped with each other to illuminate a front area of the vehicle. A light distribution characteristic of only one of the lamps is independently changed and controlled. For example, a light distribution characteristic where the luminosity of a direct front area of an own vehicle is somewhat reduced may be obtained by changing the light distribution pattern of one lamp from that of the other lamp. This prevents the driver of an oncoming vehicle from being dazzled by the light reflected on a road surface in the direct front area. At the same time, this avoids the direct front area being in a substantially entirely dark state and improves the visibility of the direct front area.

The invention discloses a liquid crystal display device and a drive method thereof. A view angle controlling electrode is arranged on a second substrate (a color filter substrate) of the liquid crystal display device, and voltage is applied to the view angle controlling electrode when a narrow view angle is required, so that an electric filed perpendicular to the direction of a panel is generated among the view angle controlling electrode, and a pixel electrode and a public electrode which are arranged on a first substrate (an array substrate), liquid crystal molecules are subjected to an angle inclination change in the vertical direction, the objectives of inclined-view dark-state light leakage, reduction of the contrast, narrowing of the view angle, and narrow-view-angle display are realized. Accordingly, by adjusting the voltage applied to the view angle controlling electrode, switching between the mode of the wide view angle and the mode of the narrow view angle can be achieved.

The configurations and controlling methods of a display device are provided in the present invention. The proposed display device having an environmental brightness, a display content and a display background with a display brightness includes a light sensor sensing the environmental brightness and adjusting the display brightness according to the environmental brightness such that a reader could read the display content easily.

A color display consists of multiple first pixel including tree colored pixels with each having at least two sub pixels to the first pixel in the first arrangement mode as well as multiple second pixel being cross ¿C set along a coordinate axial direction to multiple the first pixel and including three colored pixels with each having at least two sub pixels to the second pixel in the second arrangement mode. It features that two arrangement modes are not the same, multiple sup pixels are used to coordinate to display signal driving of bright ¿C dark state so as to solve phenomenon of bright ¿C dark unevenness on picture.

The invention relates to a color and colorama rare earth noctilucent fiber and a method for preparing thereof, which is characterized in that the method comprises the manufacture of colorama light-storing luminous base-materials, the manufacture of colorama noctilucent light-storing spinning fluid or spinning master batch and the spinning of color and colorama rare earth noctilucent fiber which comprises the following steps: taking the colorama noctilucent light-storing spinning fluid or spinning master batch and spinning raw materials to manufacture spinning materials, and the spinning materials are manufactured into the color and colorama rare earth noctilucent fiber through spinning. The color and colorama rare earth noctilucent fiber can store light energy in the fiber only through absorbing any visible light for 10min, continuously emit light for 10h in the dark state and be circularly used for infinite times, textiles which are made of the fiber, no matter being manufactured into clothing or other articles, can not lead any specific feeling to people and can continuously emit light in the dark state at night, various color of fibers can be obtained under the visible light without dyeing, thereby, the environment pollution caused by dyeing is reduced.

The invention provides a half-source driving display panel. The wiring mode of scanning lines is improved, in one distribution period, one period includes 2n scanning lines, and n is an even number equal to or larger than 4. In the distribution period, the (n+k)th scanning line connecting point on the scanning driving circuit is connected with the (2n+1-k)th scanning line, wherein k is an integer from 1 to n. By adopting the driving mode of digital signal polarity reversing by one time namely point reversing, light and dark states of pixel units are arranged at intervals, so that the problem of vertical light and dark lines in the prior art is solved. By adopting the time sequence of scanning signals output by the scanning driving circuit, the same light and dark effect can be achieved.