265results about How to "Change brightness" patented technology

In a display device including a backlight and a display panel, the area of the backlight is divided into a plurality of unit regions; the display panel includes pixels which are larger in number than the unit regions; a frame rate of image data input to the device is converted to perform display while part of the unit regions in which black is displayed is in a non-light emission state; and the driving frequency of the backlight is converted in accordance with the display.

An apparatus for driving a liquid crystal display includes a picture quality improving unit that extracts a brightness component from first data, analyzes the brightness using the extracted brightness component, and generates second data having a contrast in accordance with the analyzed brightness. The contrast of the second data is extended from that of the first data. A timing controller rearranges the second data to supply the second data to a data driver. A backlight supplies the light to a liquid crystal panel in accordance with a driving current. An inverter supplies the driving current to the backlight.

The invention relates to a virtual learning environment micro-expression recognition and interaction method based on a double-flow convolutional neural network, and the method comprises the followingsteps: S1, carrying out the preprocessing of micro-expression data: carrying out the Euler video amplification of a micro-expression video, extracting an image sequence, carrying out the face positioning of the image sequence, and carrying out the cutting of the image sequence, and obtaining the RGB data of a micro-expression; extracting optical flow information from the data amplified by the Euler video to obtain an optical flow image of the micro-expression; s2, dividing the preprocessed data into a training set and a test set, and constructing a double-flow convolutional neural network by using a transfer learning method so as to learn space and time domain information of micro expressions; s3, carrying out maximum value fusion on the output of the double-flow convolutional neural network to enhance the recognition accuracy and obtain a final micro-expression recognition model; and S4, creating a virtual learning environment interaction system by using the micro-expression recognition model, and obtaining a user face image sequence through Kinect to carry out a micro-expression recognition task.

A method of driving a liquid crystal display device includes extracting brightness components of a portion of the first data for a current frame, arranging the brightness components for the current frame into a brightness histogram, retrieving brightness histograms for at least two frames prior to the current frame to generate an average histogram, generating second data for the current frame based on the average histogram, comparing the histogram for the current frame with the average histogram to determine whether an image at the current frame is a moving image or a still image, and driving the liquid crystal display device in accordance with one of the first data and the second data based on the comparison result.

A system is provided for selecting a particular barcode on an item that includes multiple barcodes. The system (1) acquires, via a barcode imager, an image of the item within the field of view of the barcode imager, (2) analyzes the acquired image to determine a set of potential barcode fields, (3) determines, using a predetermined criterion (e.g., distance from center of imaged area, type of bar code, etc.), a candidate barcode field from among the set of potential barcode fields, (4) displays a modified image derived from the acquired image, wherein the candidate barcode field is identified within the modified image, and (5) allows the user to initiate a decode session when the candidate barcode field includes the desired barcode. The acquired may be modified to highlight the candidate barcode field in any number of ways, including, for example, superimposing an artificial reticule around the candidate field, superimposing an artificial scan line over the field, altering the contrast of the field, and / or altering the brightness of the field.

A system is provided for selecting a particular barcode on an item that includes multiple barcodes. The system (1) acquires, via a barcode imager, an image of the item within the field of view of the barcode imager, (2) analyzes the acquired image to determine a set of potential barcode fields, (3) determines, using a predetermined criterion (e.g., distance from center of imaged area, type of bar code, etc.), a candidate barcode field from among the set of potential barcode fields, (4) displays a modified image derived from the acquired image, wherein the candidate barcode field is identified within the modified image, and (5) allows the user to initiate a decode session when the candidate barcode field includes the desired barcode. The acquired may be modified to highlight the candidate barcode field in any number of ways, including, for example, superimposing an artificial reticule around the candidate field, superimposing an artificial scan line over the field, altering the contrast of the field, and / or altering the brightness of the field.

Disclosed is a method for generating transfer curves for adaptive contrast enhancement. Transfer curves are generated so as to enhance the bright pixels in mostly dark images and the dark pixels in mostly bright images. For a dark image, a transfer curve is generated which increases luminance in high-luminance regions of the image without substantially changing the luminance in the mid- and low-luminance regions of the image. For a bright image, a transfer curve is generated which decreases the luminance in the dark areas of the image without substantially changing the luminance in the mid- and high-luminance regions of the image. For a medium-bright image, a transfer curve is generated with increases the luminance in the high-luminance range and decreases the luminance in the low-luminance range of the histogram without substantially changing the luminance in the medium-luminance range of the image.

The invention relates to a high-conductivity, stretchable, compressible and repairable zwitterionic gel polymer electrolyte as well as preparation and application thereof. Zwitterionic SBMA, and monomers HEMA and LiCl which can enhance mechanical properties and do not affect electric conductivity are utilized, and the gel polymer electrolyte with good performance is prepared through an in-situ polymerization reaction. The P(HEMA-SBMA) electrolyte has good tensile compression performance, and the strain and stress can be adjusted by regulating the monomer ratio and the content of LiCl, so thatthe desired electrolyte with super-tensile strength or high strength is obtained. 50% compression cycle tests can be carried out for 50 times. The good adhesion provides the capability of maintainingthe shape of equipment when the assembled energy storage equipment bears deformation, and the electric conductivity is responsive during stretching and compression.

The invention provides a keyboard backlight device, which comprises: at least one LED on around every light point, a LED driver, a LED drive and control unit to output impulse modulation signal to control output voltage or current of LED driver and regulate brightness, and keyboard backlight set device connected to drive unit to control modulation signal. This invention changes monotonicity of keyboard backlight, increases fashion and interesting to mobile phone.

The invention relates to a PWM (Pulse-Width Modulation) dimming an LED (Light Emitting Diode) road lamp controller based on Zigbee and is mainly used for controlling a road lamp as well as discovering and solving failure problems in time. The PWM dimming the LED road lamp controller comprises an LED lamp, a power supply module, a wireless sensing module, a control module, a base station and a computer, wherein the power supply module comprises a power supply control chip, an input power supply, a booster circuit and a constant-current output circuit; the control module comprises a PWM wave generator, an illumination intensity acquisition sensor, a failure feedback module and an executing node; the input power supply adopts a constant-current power supply of an LED solar energy road lamp; the control module is connected with the base station through a Zigbee wireless sensor network; and the base station is connected with the computer. The PWM dimming the LED road lamp controller is used for supplying power through environment-friendly solar energy and collecting long-distance illumination intensity through the Zigbee wireless sensor network; and PWM waves can be used for controlling luminance variation of each road lamp and receiving failure alarm signals of each road lamp.

A method of exposure control in an image pickup apparatus includes determining whether a zoom lens has been moved, determining whether an F value obtained from information about focal position of a focus lens linked to movement of the zoom lens has changed, estimating a variation in the focus luminance before and after a change in the F value from the F values before and after the change when the F value has been changed, changing the shutter speed determined according to a focus luminance before the change to a shutter speed determined according to the focus luminance after the change, based on the estimated variation in the focus luminance, and changing a frame rate determined according to the focus luminance before the change to a frame rate determined according to a focus luminance after the change according to the changed shutter speed.

A digital camera is provided with a photographing lens having a aperture mechanism, an imaging section, including an image sensor for capturing a subject image via the photographing lens, a display section capable of displaying image information, an aperture drive section for driving the aperture mechanism to a specified position in response to manual operation of a preview instruction member, and a control section for causing execution of an exposure operation for a specified period in the imaging section, and causing display of a moving image on the display section based on image data acquired by the exposure operation. The control section stops the moving image display during drive of the aperture mechanism by the aperture drive mechanism, to thereby prevent unnatural variation in brightness of an image in live view display when a preview operation is carried out.

A flat-panel type display is provided, in which a marginal portion of a cathode panel provided with a plurality of electron emission regions and a marginal portion of an anode panel provided with luminescent layers and an anode are bonded to each other, spacers are disposed between the cathode panel and the anode panel, and a space sandwiched between the cathode panel and the anode panel is maintained under vacuum. The spacer includes a substrate of spacer and an antistatic coating disposed on the side surface of the spacer material, wherein the antistatic coating is formed from germanium nitride containing no transition metal, the thickness of the antistatic coating is within the range of 2 nm to 20 nm, and the volume resistivity of the substrate of spacer is within the range of 5×106 Ω·m to 2×108 Ω·m.

The invention provides a laser searchlight. The laser searchlight comprises a laser diode, a transflective mirror, a first focusing lens group, a second focusing lens group, a phosphor layer, a scattering layer, a first light emitting lens, a second light emitting lens, a distance detection device and a laser adjustment device. Lasers output by the laser diode serve as incident laser beams, the incident laser beams are split into two beams by the transflective mirror, one beam of the lasers is focused onto the phosphor layer by the first focusing lens group, and the other beam of the lasers is focused onto the scattering layer by the second focusing lens group; and fluorescent light output from the phosphor layer and the lasers reflected by the scattering layer are mixed to form the final output light. The distance detection device detects the distance of the front irradiated object in real time, and when the distance is smaller than the safety distance, the output light intensity is adjusted or laser output is turned off through the laser adjustment device. According to the structure of the laser searchlight, the light intensity can be lowered automatically during short-distance irradiation, and the situation that the human eyes are erroneously illuminated, and the personal safety is endangered is prevented.

A coupling compensator for a display panel and a display device including the coupling compensator are disclosed. In one aspect, the coupling compensator includes a memory configured to receive grayscale data and store the grayscale data and a first data converter configured to convert the grayscale data to a plurality of grayscale data voltages including first and second grayscale data voltages. The compensator also includes a coupling voltage calculator configured to calculate a line coupling voltage generated on a data line based on the difference between the first grayscale data voltage corresponding to the grayscale data provided to a first group of the pixels in an (N?1)th row and the second grayscale data voltage corresponding to the grayscale data provided to a first group of the pixels in an Nth row, where the N is an integer equal to or greater than 2.

A display device includes a backlight having a discharge tube and a reflector. A heat conduction member is attached to the reflector in contact with the discharge tube, so that a part of the discharge tube is locally cooled by the heat conduction member. Liquid mercury is collected at a first position in the discharge tube, and the backlight is assembled so that the heat conduction member or other cooling device is located at the first position. Also, the display device includes an optical sheet having a diffusion portion having projections containing scattering material particles.

An apparatus for driving a liquid crystal display includes a picture quality improving unit that extracts a brightness component from first data, analyzes the brightness using the extracted brightness component, and generates second data having a contrast in accordance with the analyzed brightness. The contrast of the second data is extended from that of the first data. A timing controller rearranges the second data to supply the second data to a data driver. A backlight supplies the light to a liquid crystal panel in accordance with a driving current. An inverter supplies the driving current to the backlight.

In an anisotropic optical film including two or more anisotropic light diffusion layers where a linear transmittance varies depending on an incident light angle, each of the anisotropic light diffusion layers has a matrix region and a plurality of pillar regions that differ in refractive index from the matrix region, at least two types of anisotropic light diffusion layers (a) and (b) that differ in aspect ratio between a short diameter and a long diameter at a cross section perpendicular to an orientation direction of the pillar regions are used as the anisotropic light diffusion layers, the aspect ratio between the short diameter and the long diameter in the pillar regions is made less than 2 in the anisotropic light diffusion layer (a), and the aspect ratio between the short diameter and the long diameter in the pillar regions is made 2 or more and 20 or less in the anisotropic light diffusion layer (b).

A display device includes a backlight having a discharge tube and a reflector. A heat conduction member is attached to the reflector in contact with the discharge tube, so that a part of the discharge tube is locally cooled by the heat conduction member. Liquid mercury is collected at a first position in the discharge tube, and the backlight is assembled so that the heat conduction member or other cooling device is located at the first position. Also, the display device includes an optical sheet having a diffusion portion having projections containing scattering material particles.

The invention discloses an image display method of an LCD, which is used for driving a plurality of pixels when a first vision frame and a second vision frame are sequentially displayed. The method includes the following steps: a gray-scale difference between the first vision frame and the second vision frame is detected to judge the change of a driving mode between the first vision frame and the second vision frame; according to the change of driving modes, the quantity proportion of the pixels driven by a dynamic mode and a static mode is regulated when the second vision frame is displayed; and a plurality of gray-scale data corresponding to the pixels are regulated when the second vision frame is output. The imaging display method can avoid the sudden and severe change of the brightness of images when the driving modes are changed so as to lead users to have no feeling of the fluctuation of the images so as to further enhance the quality of the LCD and the image display.

This invention relates to a LCD display and its aphototropism module, which comprises the circuit board, first light source, first signal adjusting device and second light source, wherein the first signal adjusting device is located on the circuit board and connected to the first light source. The first signal adjusting device adjusts the first light source brightness to make the first and second light sources generate same brightness to get a good even brightness of the LCD panel.

A picture processor for a video conference device, etc., can be used easily by carrying it into a room other than the video conference room, has an object of enabling the display of the input picture to be switched freely even if the picture of the line drawing is displayed together with the input picture. The picture of a line drawing, etc., is held at the corresponding position even in cases where the display of the input picture is switched by updating the input picture data, which is stored in the input picture memory 40, on the basis of the line drawing data and by writing the picture expressed with the line drawing data directly in the input picture, which is stored in the input picture memory 40.

The invention relates to a video plagiarism detection method and system. According to the method and system, a multi-frame difference method is combined on the basis of a difference hash image recognition algorithm, key frames of a video to be detected can be accurately extracted, and the problems that a single traditional hash algorithm is low in image processing accuracy, long in algorithm running time and the like are solved. The multi-frame difference method adopted by the invention is improved on the basis of the traditional inter-frame difference method, and compared with the traditionalalgorithm for extracting the video key frame, and the defect that only the boundary part can be extracted and the relatively complete region cannot be extracted is overcome. According to the method,a multi-frame difference method and a difference hash algorithm are combined, and the effect of extracting the video key frames in the aspects of frame number, accuracy and algorithm running time is optimal.

The invention discloses a method for achieving the message cue, which comprises: analyzing the data structure of the initial message cue graphic to acquire the initial color data of the initial message cue graph, receiving the goal value of the color data and hanging the initial color data of the graph into the new color data, adopting the initial color data and the stored new color data to generate the message cue graph to achieve the message cue by the control of the timer. The invention also discloses a device for achieving the message cue.

The invention relates to a method for adjusting white balance, which comprises the steps as follows: a first matrix is generated according to the values of the optical characteristics of a plurality of first light-emitting diodes along the axial directions of a color gamut coordinate; a second matrix is generated according to the values of the optical characteristics of a plurality of first light-emitting diodes along the axial directions of the color gamut coordinate when at white balance; a third matrix is generated according to the optical characteristics of a plurality of second light-emitting diodes along the axial directions of a color gamut coordinate; the first matrix, the second matrix and the third matrix are stored; the second matrix is multiplied by the inverse matrix of the first matrix so as to generate a correction matrix; the third matrix is multiplied by the correction matrix so as to generate a fourth matrix; then only needing to be in accordance with the difference between the fourth matrix and the second matrix, the optical characteristics of a plurality of second light-emitting diodes can be adjusted fast and effectively. The method has the advantage of being capable of adjusting a backlight module and a backlight panel to be adjusted to the optimal white balance state.

The invention discloses a Light emitting diode (LED) dimming color temperature adjusting circuit, which is used for dimming and color temperature adjusting of an LED lamp string comprising at least one warm light lamp string and at least one cold light lamp string. The LED dimming color temperature adjusting circuit comprises a master controller, a pulse-width modulation (PWM) control unit and a color temperature adjusting unit. The master controller is used for generating a path of dimming PWM signal and a path of color temperature adjusting PWM signal. The PWM control unit is connected with the master controller. The color temperature adjusting unit is connected with the master controller. The input side of the PWM control unit is connected with the input end of an alternating current (AC) through a rectification filter unit. The output side of the PWM control unit is connected with the LED lamp string through a power control unit. As the master controller controls the PWM control unit and the color temperature adjusting unit separately, and two paths of signal are independent, brightness adjustment of the LED lamp string does not cause change of the color and temperature, similarly, adjustment of the color and temperature does not cause change of brightness. When the master controller is an N-bit microprogrammed control unit (MCU), the grade of dimming color temperature adjustment can reach the grade of 2N*2N=22N, so that the brightness and color temperature of the light source can be adjusted precisely.