100results about How to "Good white balance" patented technology

Systems and methods to improve the white balance of a high dynamic range image are disclosed. In a particular embodiment, an imaging device includes a camera sensor and a processor, the processor configured to capture a lighter image and a darker image of a scene. The processor is then configured to white balance the lighter image based on the lighter regions of the image, and to white balance the darker image based on the darker regions of the image. The two images can then be combined to produce a final image.

A light source device which employs a plurality of light emitting diodes for emitting different colors of light, and a projection display which incorporates the light source device provide for a good white balance and a high light utilization efficiency in consideration of light emission efficiencies inherent to the respective color light emitting diodes. An illumination beam from each of light emission boards is converted to one type of polarized light respectively by associated polarized light forming means, and resulting polarized light beams are combined by a polarizing beam splitter to produce an illumination beam for illuminating a two-dimensional image device which may comprise a digital mirror device (DMD). The light emitting diodes in the respective colors are arranged on respective light emission boards in a predetermined ratio of distribution to optimize the white balance.

A color conversion substrate including a first fluorescent layer 2a emitting first fluorescence and a second fluorescent layer 2b emitting second fluorescence on a supporting substrate 1, and the first fluorescent layer 2a including an organic fluorescent material and the second fluorescent layer 2b comprising a semiconductor nanocrystal.

The present invention is characterized by adding a bit having the value of one below the least significant bit of n bit digital data having red image information inputted from the external, adding a bit having the value of zero above the most significant bit of n bit digital data having green image information inputted from the external, and adding a bit having the value of zero above the most significant bit of n bit digital data having blue image information inputted from the external, whereby producing (n+1) bit digital data having red image information, (n+1) bit digital data having green image information, and (n+1) bit digital data having blue image information, respectively, for displaying an image.

A color display is provided that includes a light emitting sub-pixel and a filter layer including first and second color filter materials. The first color filter material is adapted to reduce transmittance of visible light outside a first transmittance spectrum corresponding to a first color, and the second color filter material is adapted to reduce transmittance of visible light outside a second transmittance spectrum corresponding to a second color. The second color is different than the first color. A color display having a white-balanced pixel is provided. A method of white-balancing a light emitting device is provided. A method of reducing unwanted light output due to electrical leakage is provided to fall below a pre-determined threshold. An opaque layer may be interposed between the sub-pixels and / or may frame illuminated areas of sub-pixels, and may be a combination of red, green, and / or a blue filter material.

A display device has an improved white balance in white display and excellent display quality, and includes a plurality of pixels each including four sub-pixels More specifically, the display device includes a plurality of pixels each including: a sub-pixel pair of a red (R) sub-pixel and a green (G) sub-pixel; and a sub-pixel pair of a blue (B) sub-pixel and a green (G) sub-pixel, wherein in most of the pixels, a product of an aperture area per sub-pixel and a light amount per unit aperture area, in each of the red (R) sub-pixel and the blue (B) sub-pixel, is approximately two times that of the green (G) sub-pixel.

The invention provides an image white balance processing method and a device. The image white balance processing method comprises acquiring color value data of pixel units of an image. Whether each pixel unit is in a color temperature deviation threshold range or not can be judged according to the color value data of the pixel units. The pixel units which are in the color temperature deviation threshold range are chosen as reference gray points. An average color value of the reference gray points and the number of the reference gray points are calculated. Whether color temperature information of the image is valid or not can be judged according to the number of the reference gray points and the color temperature deviation threshold. If the color temperature information of the image is valid, a white balance correction coefficient is calculated according to the average color value of the reference gray points, and a corrected color value of the each pixel unit is calculated according to the white balance correction coefficient. If the color temperature information of the image is invalid, the corrected color value of the each pixel unit is calculated according to the white balance correction coefficient of a previous image, and the color temperature deviation threshold is adjusted. The image white balance processing device processes the white balance of the images according to the image white balance processing method. The image white balance processing method and a device have the advantages of processing the white balance of the images accurately and reducing calculated quantity.

A projection display device includes light sources having light-emitting elements for emitting lights in R, G, B colors, temperature sensors for the respective colors disposed near the light sources in the respective colors, light sensors for the respective colors disposed near the light sources in the respective colors for detecting light leakages from the light sources in the respective colors, cooling means for cooling the light sources in the respective colors, light modulators employing three panels of liquid crystal devices, a projection optical system, an amount-of-light controller for maintaining a predetermined ratio of the amounts of lights emitted from the light sources in the respective colors, and cooling controller 7 for controlling the cooling means for the light sources in the respective colors. The light sensors for the respective colors measure the respective amounts of lights emitted from the light-emitting elements, and the amount-of-light controller compares and adjusts the amounts of lights in the red, green, and blue colors emitted from the light-emitting elements to thereby keep a white balance. It is possible to maintain displayed images with an optimum white balance even if the junction temperatures of the light-emitting elements vary to change the light emission efficiency and even if the light-emitting elements are deteriorated from long-term use, thus reducing the amounts of lights emitted thereby.

The invention discloses a standard dot matrix light source and an image point correction method of a light-emitting diode (LED) display screen. The method comprises the following steps of: A, constructing the standard dot matrix light source, and calibrating the brightness and the chroma of the standard dot matrix light source; B, acquiring image data of the LED display screen, and the brightness and the chroma of the standard dot matrix light source; C, comparing the acquired brightness and chroma of the standard dot matrix light source with a stored value to obtain an error compensation matrix, and converting the image data of the LED display screen from a relative value into an absolute value; D, analyzing the converted image data of the LED display screen to generate a data correction coefficient matrix; and E, outputting the data correction coefficient matrix to an image point correction processor to perform image data correction processing so as to obtain corrected image data according to the data correction coefficient matrix, and finally outputting the corrected image data to an LED large screen display system. The standard dot matrix light source and the image point correction method can overcome adverse effects caused by working condition drifting of a camera to ensure that the LED display screen has better light-color consistence and white balance after performing the image point correction; and an additional light colorimeter is not needed, and a plurality of times of tests are not performed any more.

An electronic camera controls an imaging section to generate a test image without flash and a main image with flash. Then, the electronic camera judges correlation between histogram distributions of the test image and the main image. If the correlation between the histogram distributions is low, the electronic camera judges that the flash illumination is uneven and performs white balance adjustments, placing greater importance on the color temperature of the flash. Conversely, if the correlation between the histogram distributions is high, the electronic camera judges that the flash illumination is uniform and performs white balance adjustments, placing greater importance on the color temperature of the main image.

A transflective liquid crystal device is provided that has red, green and blue colored layers provided in correspondence with a plurality of dot portions, and reflective layers overlapping the colored layers in plan view. In the plurality of dot portions, transparent bank layers and colored layers arranged to fill regions defined by the bank layers are respectively provided, and the forming areas of the bank layers in the respective dot portions are different from each other such that the forming areas of the colored layers in the respective dot portion are different for each color.

An imaging apparatus includes an image pickup element to acquire a short-exposure-image data and a long-exposure-image data; a white balance evaluation value acquiring device to acquire white balance evaluation value for each of short-exposure-image data and long-exposure-image data; a white extraction range setting device to set a white extraction range for each of short-exposure-image data and long-exposure-image data; a white extraction device to extract white extraction result on the basis of the white balance evaluation value and the white extraction range for each of short-exposure-image data and long-exposure-image data; a correction factor calculating device to calculate corrected white extraction results from the white extraction result on the basis of the white extraction range and calculate correction factor for each of short-exposure-image data and long-exposure-image data; a white balance correcting device to correct the short-exposure-image data and the long-exposure-image data to form white balance corrected short-exposure-image data and white balance corrected long-exposure-image data by using the correction factors; and a synthesizing device configured to synthesize the white balance corrected short-exposure-image data and the white balance corrected long-exposure-image data.

An active element substrate and an opposed substrate sandwich a liquid crystal layer to constitute a liquid crystal display device. On the active element substrate, two signal lines respectively charge a pair of pixels that are adjacent to each other in a direction parallel to scanning lines. The two signal lines are provided intensively on a pixel electrode of one of the pair of pixels. In the direction parallel to the scanning lines, a pixel electrode on which signal lines are provided, and a pixel electrode on which signal lines are not provided, are arrayed alternately. This arrangement makes it possible to reduce, while ensuring a wide process margin, the fluctuation of the potential of a terminal to be connected to a pixel electrode (the fluctuation of the potential occurs during OFF-period of an active element due to capacitances respectively provided at superimposed portions of signal lines and a pixel electrode), to simplify the arrangement of signal lines, and to improve the aperture ratio.

A method for correcting the white balance of a display by: setting a target color coordinates of a target white point of a target white point plane at a predetermined color temperature and a group of gray levels as the input gray levels in response to a user input command; constructing a white color image according to the group of the gray levels; measuring luminance and color coordinates of a measured white point of the white color image; estimating luminance of the R, G, B based on the standard color coordinates defined in a standard color space, the measured luminance and color coordinates of the measured white point; estimating gray levels of the R, G, B based on the estimated luminance of the R, G, B; and reconstructing the Gamma table based on the estimated adjusted gray levels of the two adjustable colors.

The invention relates to a method and a system for realizing white balance of a liquid crystal display module. The method for realizing the white balance of the liquid crystal display module comprises the following steps: obtaining the size of liquid crystal glass of the liquid crystal display module and setting a target color coordinate according to the size of the liquid crystal glass; obtaining a white frame color coordinate with the liquid crystal glass in the size matched with LEDs (Light Emitting Diodes) in different sizes and obtaining a chromatic aberration between each white frame color coordinate and the target color coordinate; selecting the sizes of a preset quantity of LEDs from small to big according to the chromatic aberration; and selecting an LED from the preset quantity of LEDs in the sizes as a backlight source of the liquid crystal display module. According to the method and the system for realizing the white balance of the liquid crystal display module, the LEDs matched with the liquid crystal glass in size are selected; compared with the traditional selection by continuously exchanging the LEDs, the method has the advantage that the time is saved; and the LEDs in all sizes are not needed to be purchased and only the tested and selected LEDs in the corresponding sizes are purchased, so that the cost is saved.

A display device has an improved white balance in white display and excellent display quality, and includes a plurality of pixels each including four sub-pixels More specifically, the display device includes a plurality of pixels each including: a sub-pixel pair of a red (R) sub-pixel and a green (G) sub-pixel; and a sub-pixel pair of a blue (B) sub-pixel and a green (G) sub-pixel, wherein in most of the pixels, a product of an aperture area per sub-pixel and a light amount per unit aperture area, in each of the red (R) sub-pixel and the blue (B) sub-pixel, is approximately two times that of the green (G) sub-pixel.

A more preferable WB gain is calculated during strobe illuminated photography. When a WB gain for an image captured through strobe illuminated photography is calculated, the degree of contribution of strobe light is first estimated. When the degree of contribution is estimated, the image is first divided into a plurality of blocks, and typical brightness values and typical color values of the respective blocks are determined (S23). Subsequently, the highest-brightness block among the blocks analogous to the color of strobe light is identified as a strobe color block (S26). When there is a strobe color block, the degree of contribution of strobe light is estimated on the basis of the position of the strobe color block, a difference between the brightness of the strobe color block and the brightnesses of other blocks, and the like (S32 to S48). Meanwhile, when there is no strobe color block, the degree of contribution is estimated on the basis of the position of the highest-brightness block having the highest typical brightness value among the plurality of blocks (S28, S30).

An electroluminescent element which can easily control the balance of color in white emission (white balance) is provided according to the present invention. The electroluminescent element comprises a first light-emitting layer containing one kind or two or more kinds of light-emitting materials, and a second light-emitting layer containing two kinds of light-emitting materials (a host material and a phosphorescent material) in which the phosphorescent material is doped at a concentration of from 10 to 40 wt %, preferably, from 12.5 to 20 wt %. Consequently, blue emission can be obtained from the first light-emitting layer and green and red (or orange) emission can be obtained from the second light-emitting layer. An electroluminescent element having such device configuration can easily control white balance since emission peak intensity changes at the same rate in case of increasing a current density.

An illumination device comprises a light source (3a) that includes a solid-state light source whose peak wavelength is set in the red wavelength band, a light source (3b) that includes a solid-state light source whose peak wavelength is set in the green wavelength band, a light source (3c) that includes a solid-state light source whose peak wavelength is set in the blue wavelength band, and a color synthesis optical element (1) that combines P-polarized colored light incident from one light source (3b) and S-polarized colored light incident from the other two light sources (3a and 3c). One light source (3c) includes at least one solid-state light source whose peak wavelength is set in the wavelength band of the color corresponding to one of the other light sources (3b).

The invention relates to a white balance processing method and relative video device. Wherein, it is characterized in that: the RGB color spatial image is converted into YCbCr color spatial image; according to the brightness and color of each pixel, deciding the gray color point; according to the gray color point, adjusting the color of pixel in the RGB color spatial image. The invention can avoid the defects of hand-operated white balance treatment, without changing the former color of scenery. The invention can obtain accurate judgment of gray color point, to obtain better white balance effect on the image frame. The inventive method can be used in whole image frame.

The invention provides a projection system brightness adjusting method; the projection system comprises a lighting device and a light valve; the lighting device is used for emitting lights of at leasttwo colors; the light valve is used for receiving the lights of at least two colors, and modulating images according to inputted image data so as to display projection frames; the method comprises the following steps: obtaining to-be-projected projection brightness of the projection system; obtaining each color light intensity preset ratio corresponding to the to-be-projected projection brightness; forming each color light modulation signal according to the each color light intensity preset ratio and the inputted image data; inputting each color light modulation signal into the projection system light valve. The light valve modulates the images in a time period of the lighting device emitting the corresponding color light according to each color light modulation signal, thus enabling eachcolor light intensity ratio of the projection system true projection image to be equal to each color light intensity preset ratio. The invention also provides the projection system.

A method for adjusting white balance and its organic LED driving control circuit of active matrix includes providing multiple programmable voltage sources to be used as picture element power source of red, green and blue for organic LED display panel of active matrix and utilizing a white balance adjustment circuit to dynamically adjust voltage value of programmable voltage source according to working condition of display panel for achieving white balance purpose of display panel.

Disclosed are a white balance calibration method based on skin color data and an image processing apparatus using the same. By using the method and the image processing apparatus, weight allocation of the skin color data in an input image may be adaptively performed to avoid white balance calibration errors due to excessive skin color data. Therefore, the present disclosure can further solve an issue that in video applications, the white balance calibration is easily interfered by a large amount of the skin color data. Moreover, the present disclosure may be adapted to different color temperatures and may output images having colors closer to actual colors.