34results about How to "Balance brightness" patented technology

A method of calculating a brightness balance value for a digital image including a plurality of pixels, comprising the steps of: calculating a spatial activity measure in a plurality of local neighborhoods of pixels of the digital image, each local neighborhood including a plurality of pixels; generating a weighting factor for each of the local neighborhoods of pixels as a function of the spatial activity of the local neighborhoods of pixels, the weighting factors having more than two possible values; and applying the weighting factors to the pixels of the digital image to produce the brightness balance value.

In order to make a boundary inconspicuous, which is located between an image area which displays an image by translucent pixels and a dummy area which always displays a white color by reflection pixels, a size ratio of transparent areas in color filters of the reflection pixels with respect to reflection areas therein is made larger than a size ratio of transparent areas in color filters of the translucent pixels with respect to reflection areas therein. In such a way, brightness of the display is balanced by adjusting quantities of transmission light through the transparent areas of the reflection pixels with respect to quantities of reflection light generated unexpectedly on transmission areas of the translucent pixels. Then, degrees of whiteness in the translucent pixels and the reflection pixels are approximated to each other.

The present invention is a broadband projection-receiving surface that can function as a projection screen. This surface can, even in strong ambient light, provide high gain, prevent glare and speckle, provide high contrast, preserve of gray-scale linearity, provide a uniformity of brightness, provide rapid angular cut-off, preserve polarization, and provide the ability to function over a large spectral range. These achievements result from a production method that utilizes purposeful partitioning of the material processes used in sub-wavelength morphology (finish) from the processes used to make super-wavelength morphology (figure).

The invention provides stereo projecting equipment which comprises a light source assembly, a first polarizing beam splitter, a second polarizing beam splitter, a third polarizing beam splitter, a fourth polarizing beam splitter, a first polarizing converter, a second polarizing converter, a first reflection type electrooptical modulator, a second reflection type electrooptical modulator and a projecting lens, wherein light emitted by the light source assembly is split into a first polarizing light beam and a second polarizing light beam by the first polarizing beam splitter, and the polarizing states of the two polarizing light beams are mutually vertical; the first polarizing light beam is reflected to the second polarizing light beam splitter by the first polarizing beam splitter; and the second polarizing light beam is sequentially transmitted through the first polarizing beam splitter and the second polarizing beam splitter. The invention has the advantages that a practical stereo projecting equipment scheme with two reflection type electrooptical modulators is proposed, and light split paths are symmetrical, thus, a binocular parallax projecting image with balanced brightness and contrast is obtained easily; and more excellent micro stereo projecting display is realized under the level of the prior art.

The invention relates to a camera device. The camera device comprises a flasher, a sensing module, a brightness processing module and a brightness compensation module. The flasher is used for laser pre-flashing and main flashing. The sensing module is used for sensing the image information which is fed back after the pre-flashing of the flasher. The brightness processing module is provided with a preset brightness value. The brightness processing module can divide the image information sensed by the sensing module into a high brightness block and a low brightness block, calculate the brightness difference between the average brightness value of the high brightness block and the average brightness value of the low brightness block, compare the brightness difference with the preset brightness value, and judge whether the image information has the depth of field and judge the degree of the depth of field according to the comparison result. If the brightness processing module judges that the image information has the depth of field, the brightness compensation module corrects the main flashing intensity and photosensitivity of a field depth degree correcting flashing device according to the degree of the depth of field judged by the brightness processing module. In addition, the invention also relates to a camera method.

The invention discloses a cellphone and an edge-in backlight module. The edge-in backlight module comprises a light guide plate and a light source emitting light into the lateral side of the light guide plate. The longitudinal section of the light guide plate along the light incidence direction is wedged-shaped, and the light source is arranged on a thickest end face of the light guide plate. By the wedge-shaped light guide plate, the nearer the light guide plate is to the light source, the thicker the light guide plate is, the higher the transmission loss of light rays in the light guide plate after reflection is, and on the contrary, the further the light guide plate is to the light source, the thicker the light guide plate is, the lower the transmission loss of the light rays in the light guide plate after reflection is, thus, luminance of the light guide plate is balanced, and the luminance of the edge-in backlight module meets the requirement on uniformity by the lower cost.

The invention discloses a pulse width modulation (PMW) modulation circuit which specifically comprises a first transmission door, a first current comparer, a first alternative selector, a reset set (RS) trigger, two input nor gates, a phase inverter, a first N-channel metal oxide semiconductor (NMOS) tube, an error accumulation capacitor and a comparer with the selection function. The PMW modulator circuit can certainly modulate external input PWM signals according to current actually flowing through a light-emitting diode (LED), the duty ratio is adjusted, the duty ratio of the PWM signals actually participating in dimming in the circuit can be dynamically and correspondingly modulated as actual current change of the LED, and a signal driving switch of the LED is controlled to enable the luminance of the LED in all digital pulse periods to be equal to a preset value to improve PME dimming accuracy.

The invention provides an array substrate including an array of sub-pixels, multiple data lines and multiple scan lines. The array of sub-pixels is divided into multiple column groups along the arrangement direction of the data lines and divided into multiple row groups along the arrangement direction of the scan lines. By the arrangement design of a connection manner of the sub-pixels with the data lines and scan lines in the array substrate, when is driven by a dot inversion method, each column of sub-pixels have intervally arranged well-charged sub-pixels and poorly-charged sub-pixels, so that in a liquid crystal panel including the array substrate, brightnesses of various areas are balanced on the whole and the drawback of the existence of bright and dark lines in the vertical direction is improved. A liquid crystal panel including the array substrate, and a corresponding liquid crystal display device also are provided.

A backlight unit is prepared as setting a light source support zone on support base and at least two point light sources on light source support zone, setting diffusion plate above support base and two said point light sources, making positions of two said point light sources be different along thickness direction of backlight unit or making optical axis pointing directions of emitting light be different for raising optical performance of backlight unit.

An optically controlled lighting device and a control method thereof are provided. The optically controlled lighting device includes a lighting main body, a dimming time controller and an optical detector. The control method includes the following steps. In a step (a), the lighting main body, including a controlling circuit and a light source, the dimming time controller and the optical detector are provided. In a step (b), the dimming time controller is enabled to respectively generate an on / off dimming signal, and the light source is respectively turned on / turned off during an on / off period respectively corresponding to the on / off dimming signal, wherein the off period is shorter than the time period for producing persistence of vision. In a step (c), an ambient light intensity is detected by the optical detector during the off period, the brightness of the light source is increased or decreased or the light source is turned off.

In order to make a boundary inconspicuous, which is located between an image area which displays an image by translucent pixels and a dummy area which always displays a white color by reflection pixels, a size ratio of transparent areas in color filters of the reflection pixels with respect to reflection areas therein is made larger than a size ratio of transparent areas in color filters of the translucent pixels with respect to reflection areas therein. In such a way, brightness of the display is balanced by adjusting quantities of transmission light through the transparent areas of the reflection pixels with respect to quantities of reflection light generated unexpectedly on transmission areas of the translucent pixels. Then, degrees of whiteness in the translucent pixels and the reflection pixels are approximated to each other.

An image capturing device includes a plurality of light emitters, an image capturer, a memory and a processor. The memory stores a target brightness value. The processor controls the light emitters to emit light and controls the image capturer to capture an image. The image is divided into a plurality of areas and the light emitted by each of the light emitters corresponds to one of the areas. The processor calculates a current brightness value of each area and calculates an absolute difference between the current brightness value of each area and the target brightness value. The processor determines whether each absolute difference is larger than a first threshold. According to a determination result, the processor adjusts an exposure parameter of the image capturer or adjusts a light emitting intensity of the light emitter corresponding to the area with the absolute difference larger than the first threshold.

The invention provides a brightness regulating circuit, which is used for synchronously regulating the brightness of a first light-emitting component and a second light-emitting component, and comprises a power supply voltage source connected with a pulse generator, wherein the pulse generator is used for outputting a modulation wave which comprises a wave crest and a wave trough; a variable resistor is arranged in the pulse generator, and the size of the variable resistor changes in the same direction of the width of wave crest; the pulse generator is connected with a base electrode of a triode; a collector electrode of the triode is connected with the power supply voltage source; an emitter of the triode is grounded; the collector electrode of the triode acquires an out-phasing modulation wave; the pulse generator is also connected with one end of a first integral circuit, while the other end of the first integral circuit is connected with an anode of the first light-emitting component; and the collector electrode of the triode is connected with one end of a second integral circuit, while the other end of the second integral circuit is connected with an anode of the second light-emitting component. Through the regulation of the variable resistor, the brightness of different light-emitting components can reach balance.

The present invention provides methods, apparatus and systems for balancing the brightness of a flat panel display using varying thicknesses of ink in a display object. The invention includes a display object for a flat panel display which includes a substrate, a pixel matrix on the substrate, and ink deposited into the pixel matrix. The ink deposited in a central area of the pixel matrix has a thickness that is greater than ink deposited in an edge / corner area of the pixel matrix. Numerous additional and alternative aspects of the invention are disclosed.

The invention provides an array substrate including an array of sub-pixels, multiple data lines and multiple scan lines. The array of sub-pixels is divided into multiple column groups along the arrangement direction of the data lines and divided into multiple row groups along the arrangement direction of the scan lines. By the arrangement design of a connection manner of the sub-pixels with the data lines and scan lines in the array substrate, when is driven by a dot inversion method, each column of sub-pixels have intervally arranged well-charged sub-pixels and poorly-charged sub-pixels, so that in a liquid crystal panel including the array substrate, brightnesses of various areas are balanced on the whole and the drawback of the existence of bright and dark lines in the vertical direction is improved. A liquid crystal panel including the array substrate, and a corresponding liquid crystal display device also are provided.

The group of inventions relates to forming and displaying an image on curved screens using projectors, and is applicable in domed multiple projection systems, full dome theatres, planetariums, different simulators and virtual reality. The claimed device comprises a server, a camera, a module for remote control and switching. A plurality of projectors can be connected to a single server with the aid of image separating devices. The inventions make it possible to combine several information display devices to produce a single synchronized image while preventing visible overlaps, differences in colour and light intensity or parasitic flares between fragments generated by different projectors or digital screens. The inventions also provide: the possibility of playing back a high resolution encoded video stream and a multichannel audio stream; the possibility of capturing and displaying high-resolution audio and video in real-time by working with licenses which allow playback of an encodedvideo stream.

An image capturing device includes a plurality of light emitters, an image capturer, a memory and a processor. The memory stores a target brightness value. The processor controls the light emitters to emit light and controls the image capturer to capture an image. The image is divided into a plurality of areas and the light emitted by each of the light emitters corresponds to one of the areas. The processor calculates a current brightness value of each area and calculates an absolute difference between the current brightness value of each area and the target brightness value. The processor determines whether each absolute difference is larger than a first threshold. According to a determination result, the processor adjusts an exposure parameter of the image capturer or adjusts a light emitting intensity of the light emitter corresponding to the area with the absolute difference larger than the first threshold.

The invention relates to an organic light emitting display device. The display device comprises a substrate, an organic light emitting device which is formed on the substrate and a packaging cover plate which is arranged on the light emergent side of the organic light emitting device. The packaging cover plate is provided with multiple light transmitting areas and light absorbing areas which are arranged among the light transmitting areas. The light transmitting areas and the light absorbing areas are not mutually overlapped, and the position of each light transmitting area on the packaging cover plate is corresponding to the position of the organic light emitting device so that the organic light emitting device is enabled to emit light through the light transmitting areas, and the light absorbing areas absorb light of which the wavelength range is within 380nm-780nm. According to the organic light emitting display device, the brightness performance and the contrast performance of the display device can be greatly balanced on the whole so that the overall display effect can be improved.

The invention provides a light source light emitting module which comprises a wafer, a support and a printed circuit board, wherein the wafer is connected to the support, the wafer comprises a red light wafer, a green light wafer, a blue light wafer and an infrared light wafer, and the support is connected with the printed circuit board. Due to the fact that the infrared light wafer is additionally arranged based on the arrangement of the red light wafer, the green light wafer and the blue light wafer, the application range of the light source light emitting module is wider. The light source light emitting module can be used on scanning equipment made of materials sensitive to infrared light such as a currency detector.

The invention relates to a multichannel projection fusion band color automatic balance control method based on image recognition. The method includes following steps: setting a camera to be aligned with a fusion band area, fixing the posture to remain stable, and connecting the camera to a computer; and setting a fusion band transverse sampling point number N, setting a fusion band curve sampling point initial value to enable the fusion band brightness change to be linear change, projecting a synthesis image including a fusion band positioning picture and a white picture background and a fusion picture, acquiring a projection image picture by the camera through opencv, recognizing fusion band locating point area coordinates, recognizing a locating fusion band area, finding a fusion band transverse center line, dividing the center line into N equal parts, obtaining the difference between the brightness of each equal-dividing point and the brightness of the start point of the center line, calculating a fusion band control point correction value by employing a progressive bisection method, updating a projection fusion image, repeating the above steps until all control point differences are less than a specific difference threshold, and ending color adjustment of the fusion band. According to the method, the fusion picture is corrected by employing the progressive bisection correction method to achieve color balance, automatic processing is realized without artificial intervention, the obtaining of equipment is easy, and the effect is good.

The invention discloses a backlight module and a display device applying the backlight module, the backlight module is formed by splicing a plurality of backlight lamp panels, each of the plurality of backlight lamp panels comprises a body area and a splicing seam area located on the peripheral side of the body area, the abutted seam area is defined as an area adjacent to an abutted seam between every two adjacent backlight lamp panels in the plurality of backlight lamp panels; the backlight lamp panel is characterized in that the backlight lamp panel comprises a plurality of first light-emitting units, a plurality of second light-emitting units and a plurality of second light-emitting units, the first light-emitting units are arranged in the body area, the splicing seam area is arranged in the body area, the second light-emitting units are arranged in the splicing seam area, the first light-emitting units and the second light-emitting units are arranged in a matrix mode, and under the same area, the brightness of the body area is lower than that of the splicing seam area.

The present invention discloses a device and a method for achieving augmented reality. The device at least comprises an imaging module and a second processing module. The imaging module is configuredto perform imaging of a virtual image; and the second processing module is configured to perform reflection of a virtual image light and then allow the virtual image light to enter a point of sight totransmit a real image light from the outside to the point of sight. The device for achieving augmented reality can simply achieve augmented reality.

The embodiment of the invention discloses a display panel and a display device, the display panel comprises: bending display areas and a plane display area, wherein the bending display areas are arranged on the two sides of the plane display area; first pixel electrodes which are distributed in the flat panel display area in an array mode; and second pixel electrodes which are distributed in the bending display area in an array mode, wherein the size of the first pixel electrode is smaller than that of the second pixel electrode. The display panel and the display device have the advantages that the pixel openings of the bent display area are increased, the current flow of the pixel electrodes of the bent display area is increased, the problem of brightness attenuation in the bent display area is solved, and the brightness of the bent display area and the brightness of the flat display area are balanced.

The invention discloses a pulse width modulation (PMW) modulation circuit which specifically comprises a first transmission door, a first current comparer, a first alternative selector, a reset set (RS) trigger, two input nor gates, a phase inverter, a first N-channel metal oxide semiconductor (NMOS) tube, an error accumulation capacitor and a comparer with the selection function. The PMW modulator circuit can certainly modulate external input PWM signals according to current actually flowing through a light-emitting diode (LED), the duty ratio is adjusted, the duty ratio of the PWM signals actually participating in dimming in the circuit can be dynamically and correspondingly modulated as actual current change of the LED, and a signal driving switch of the LED is controlled to enable the luminance of the LED in all digital pulse periods to be equal to a preset value to improve PME dimming accuracy.

The invention belongs to the technical field of semiconductors, and provides a display device and a preparation method thereof, wherein the display device comprises a substrate, light-emitting diodes and a light reflecting part; the light-emitting diodes are arranged on the substrate, and the light reflecting part is arranged around the light-emitting diodes; and the reflecting area of the light reflecting part is set according to the light-emitting efficiency of the light-emitting diodes. According to the scheme, the light-emitting efficiency of the light-emitting diodes of different colors is balanced by regulating and controlling the reflecting area of the light reflecting part, the brightness of the light-emitting diodes is balanced, and the display effect of the display device is improved; the mode of regulating and controlling the light-emitting efficiency of the light-emitting diodes of different colors is compensated by applying an optical reflection physical phenomenon; and compared with an existing method for driving an IC and a pixel circuit, the method of compensating electrically has the advantages that the stability is better, and the cost is lower.

The invention discloses an LED display screen. The LED display screen includes: an LED light-emitting array, the LED light-emitting array includes a plurality of LED light-emitting chips; a matrix light-shielding frame, the matrix light-shielding frame includes a plurality of grids, and a plurality of the grids are connected to form a matrix, and the The grid is hollowed out, and the LED light-emitting chips are correspondingly arranged in the grid; the light-absorbing plate is used to absorb part of the outgoing light of the LED light-emitting chips, wherein the light-absorbing plate completely covers the grid LED light-emitting chips surrounded by lattice. According to the present invention, by adding a light-absorbing plate structure inside the display screen, the light emitted by the LED is all emitted through the light-absorbing plate, thereby effectively balancing the brightness of the three colors of R, G, and B at different viewing angles, and achieving the purpose of reducing chromatic aberration. Improved the visual effect of the LED display.

The embodiment of the present invention discloses an image display control method and device and a display screen control system. For example, it receives an input image, performs brightness component mapping processing on the target pixel data of the input image, and maps the brightness component to the target pixel after processing. The data is converted from the color separation color space to the primary color color space, the target pixel data converted to the primary color color space after the brightness component mapping processing is processed, and the filtered target pixel data is output to the display screen for image display. Therefore, the brightness and contrast of the displayed image can be effectively balanced, and the brightness of the image can be enhanced without losing the gray scale.

A backlight unit is prepared as setting a light source support zone on support base and at least two point light sources on light source support zone, setting diffusion plate above support base and two said point light sources, making positions of two said point light sources be different along thickness direction of backlight unit or making optical axis pointing directions of emitting light be different for raising optical performance of backlight unit.

A Liquid crystal display device comprises a backlight module and a control unit, wherein the control unit is used for controlling the backlight module to regulate the opening time and the light intensity of a backlight light source in terms of the brightness difference between a left eye image and a right eye image, so as to balance the brightness of the left eye image and the right eye image and improve crosstalk disturbance. The liquid crystal display device regulates the opening time and the light intensity of the backlight light source in terms of the brightness difference between the left eye image and the right eye image, so as to balance the brightness of the left eye image and the right eye image and reduce crosstalk disturbance.