43results about How to "Improve contrast performance" patented technology

According to the present invention, a projection type image display apparatus enables control of a large amount of light masking through a light-masking unit while maintaining a uniform illumination distribution in an area to be illuminated by the illumination light. The apparatus uses two array lenses on which lens cells are arranged in matrix form, where light-masking unit masks the array lens installed on the light source side in their particular area. The light-masking unit adjusts the amount of light emitted from the light source. The light-masking area of lens cells adjacent to lens cells closest to an optical axis is made smaller than the light-masking area of other cells.

An illuminating optical system for focusing a radiant light of a light source (1) onto a reflecting light valve (6) and a projection lens (7) for magnifying and projecting a reflected light from the reflecting light valve (6) onto a screen are provided, a diaphragm (31) is disposed at a substantially conjugate position of an entrance pupil of the projection lens (7) on an optical path of the illuminating optical system, the diaphragm (31) has an opening whose area is changed by a light-shielding member, and a shape of a shielded portion of the diaphragm (31) shielded by the light-shielding member is rotationally asymmetric to an optical axis (12) of the illuminating optical system. Accordingly, shielding of necessary light can be better avoided compared with a diaphragm for changing the light-shielding area in a rotationally symmetric manner, for example, a diaphragm for narrowing the opening concentrically, making it possible to improve contrast performance while minimizing brightness reduction.

The invention relates to a method and device for obtaining a small-incision deep operation image, in particular to the method and device for obtaining a high-quality image in a small-incision deep operation. The device comprises a shell, an LED displayer, a keyboard, an illuminating system, an image pick-up system and an image processing unit. The illuminating system comprises a light source assembly, wherein the light source assembly is provided with a cold light source interface, multiple light transmitting bundles are mounted on the cold light source interface, and each light transmitting bundle is independently arranged in a snakelike tube capable of being shaped. The image pick-up system comprises a high-definition CMOS micro camera which is fixed to the shell through a snakelike tube capable of being shaped, and the micro camera is connected with the image processing unit through a wire. The image processing unit is used for conducting color correction, contrast enhancement, white balance treatment and photometric pattern and outline emphasis treatment on image data photographed by the image pick-up system, and finally the image data are displayed through the LED displayer.

Disclosed is a color composition for pixel-forming inks, which improves the characteristics that are required for a liquid crystal color display for television receivers or the like, namely higher density of the pixel color, high definition and optical characteristics such as high contrast. Also disclosed are a pigment dispersion liquid, a pixel-forming ink, a color filter and methods for producing the same. Specifically disclosed is a method for producing a color composition that is used for a pixel-forming ink for color filters. The method for producing a color composition is characterized by comprising a step (a) wherein an aqueous filtered paste or aqueous slurry of a pigment having an average pigment particle diameter of 5-100 nm is prepared, a step (b) wherein the pigment contained in the aqueous filtered paste or aqueous slurry is transferred from the water phase to the organic medium phase that is composed of an organic solvent medium or a molten resin medium, without going through a drying process, and a step (c) wherein the thus-transferred pigment is finely dispersed, thereby obtaining a color composition. A pigment dispersion liquid and a pixel-forming ink can be produced using the color composition, and pixels of a color filter are formed with this ink.

The invention provides an attaching method and device for polarizers. The equipment comprises a backlight source, a liquid crystal box fixing unit, a polarizer adjusting unit, a detection unit and a control unit. When the polarizer attaching device works, the backlight source is electrified and a liquid crystal box is electrified to output detection images. The polarizer adjusting unit drives the polarizers to rotate around the central shafts of surfaces of the polarizers at the pre-set interval angles. The detection unit detects detection images of the polarizers at the current rotary position and transmits the detection images to the control unit. The contrast ratios are calculated according to the detection images of the polarizers at the current rotary position by the control unit. When the contrast ratios of the polarizers at the current rotary position are less than those of the detection images of the polarizers at the former rotary position, a judgment is made that polarization angles of the polarizers at the former rotary position highly coincide with the polarization angle of the liquid crystal box so that the attachment positions of polarizers at the current rotary position are determined. The attached products possess high contrast performance.

The invention provides a display screen, a manufacturing method thereof, and a display structure. The display screen comprises a transparent substrate, and a plurality of display modules; the surfaceof each display module is provided with a plurality of light emitting diode arrays and a plurality of nonvolatile memories, wherein each light emitting diode is correspondingly connected with one nonvolatile memory; the back of each display module is provided with a plurality of wafer-level ball grid array package electrodes; each display module is provided with an image processing controller anda plurality of penetrating electrodes; image signals are transmitted to the image processing controller in each display module through the wafer-level ball grid array package electrodes of the corresponding display modules; and the penetrating electrodes in each display module control and drive the image of the single display screen composed of the display modules in a unified and coordinated manner. The display screen has the advantages of high brightness and high contrast of LED display, high resolution and ultra-thin effect, and can replace an existing liquid crystal screen and OLED displayscreen.

The present invention discloses a double-layer structured low-resistance and low-reflectivity transparent conductive film, comprising a lower high-reflectivity conductive layer containing a fine metal powder in a silica-based matrix and a silica-based low-reflectivity layer, suitable for imparting electromagnetic shielding property and anti-dazzling property to a CRT.

The invention relates to a method for preparing nuclear magnetic resonance developing agent, especially relating to a carbon-coat nanometer ferric oxide with surface decoration. The invention is formed by nanometer ferric oxide, carbon and amido group, which uses the nanometer ferric oxide as corn, coated by the carbon case connected with amido group. The preparation comprises that mixing the iron source and carbon source at 1:1-10 mol ratio, to react at 120-250Deg. C for 12-72h, to obtain the nanometer carbon-coat ferric oxide particles. The invention coats the nanometer ferric oxide particles with carbon layer to improve the chemical stability, while the product can stably live in 1M alcaine solution for more than four months, to avoid iron ion intoxication. And the invention leads in surface decoration group to reduce the Zeta potential value of product under -30mV in weak-acid and neutral conditions, and improve the surface hydrophilicity without accumulation. The invention has strong respond signal of nuclear magnetic resonance.

The invention discloses a plasma display panel (PDP). The PDP grounds an exposed transparent conductive layer to the inner component thereof, so as to shield off electromagnetic interference (EMI). Accordingly, there is no metal structure in the second protective layer formed on the transparent conductive layer, such that the second protective layer can be easily attached onto the transparent conductive layer. Therefore, the manufacturing of PDP is getting much easier, and the yield rate will then increase.

The invention relates to a generalized sidelobe cancellation ultrasonic imaging method based on mixed subspace projection, and belongs to the technical field of ultrasonic imaging. The method comprises the following steps: preprocessing a received echo signal; dividing sub-matrixes, and carrying out forward and backward smoothing and diagonal loading processing to obtain a sample covariance matrix; carrying out characteristic decomposition on the sample covariance matrix, and constructing a mixed signal subspace according to the characteristic value of the sample covariance matrix and the characteristic vector correlation between an expected direction vector and the sample covariance matrix; projecting the expected direction vector of a generalized sidelobe canceller to a left singular space of the mixed signal subspace, and constructing a new blocking matrix based on the improved expected direction vector; forming a generalized sidelobe cancellation beam; projecting the weight of thewave beam to the mixed signal subspace for correction; and carrying out weighted sum of an echo signal by using the corrected weight. According to the method, the robustness and the imaging quality ofa beam forming algorithm can be remarkably improved.

A polarizer to improve contrast for LCD from down view angle is produced by laminating a triacetate cellulose (TAC) sheet on each side of a polyvinyl alcohol (PVA) sheet and further on the toppest triacetate cellulose (TAC) sheet applying a surface-treatment layer that is a protective film formed by black dye mixture to inhibit dark-state light leakage and improve the contrast for LCD from down view angle.

The invention provides a novel reflective screen. The screen comprises a support layer and a reflective layer which are stacked in sequence, The reflective layer is composed of a reflective part and an adjusting part. The adjusting part is used for adjusting the reflectivity of the reflective layer so that the reflectivity of the reflective layer is enabled to be 10%-50%. According to the reflective screen, the effective reflectivity of the reflective layer is reduced by reducing the duty ratio of the reflective layer so that the high contrast effect can be achieved without additionally addingthe light absorbing layer for absorbing ambient light, and the process difficulty and the screen cost can be reduced.

The invention relates to a projection screen. The projection screen comprises a reflecting layer, a Fresnel structure layer and a substrate layer which are arranged in sequence; and the thickness of the reflecting layer is 7-25 nm. According to the projection screen in the invention, the thickness of the reflecting layer in the projection screen is reduced, therefore, the transmittance of the reflecting layer is increased, a light absorption layer does not need to be selectively coated on the Fresnel structure layer additionally, ambient light in all directions can be absorbed, and the high contrast effect is achieved; and furthermore, the thickness of the reflecting layer is reduced, the film coating cost is reduced, and the process difficulty and the screen cost are reduced.

The invention relates to a strong-robustness minimum-variance ultrasonic beam forming method based on subspace oblique projection, and belongs to the technical field of ultrasonic imaging. The method comprises the following steps: performing spatial smoothing and diagonal loading processing on echo signals received by an ultrasonic array to obtain a sample covariance matrix, decomposing the characteristics of the sample covariance matrix into a signal subspace and an interference noise subspace, and constructing a transition matrix according to characteristic vectors of the signal subspace and corresponding characteristic values; calculating an oblique projection operator in combination with the expected direction vector and a pseudo-inverse matrix of the transition matrix, and projecting a weight obtained by minimum variance beam forming into a signal subspace in which the expected direction vector is located along a direction parallel to the interference noise direction matrix by using the oblique projection operator to obtain a new weight; performing weighted summation on the ultrasonic array echo signals by using the new weight to obtain a final adaptive beam forming signal; according to the method, the algorithm robustness can be remarkably enhanced, the image resolution is maintained, background noise is suppressed, and the ultrasonic imaging quality is improved on the whole.

The present invention provides an antiglare film which has (1) appropriate antiglare properties in a frontal direction, (2) no white-blurring (3) no surface appearance such as a kind of orange on the surface of an antiglare layer's side. It is a feature of the antiglare film of the present invention that it has an antiglare layer on a transparent substrate and the antiglare layer includes a binder matrix and particles of an acrylate-styrene copolymer. In addition, the binder matrix includes an acrylic material having a hydroxyl group, a quotient (R_A/H) obtained by dividing the average diameter of the particle (R_A) by the average thickness of the antiglare layer (H) is in the range of 0.30-0.80, and a product ((n_A−n_M)×w_A/w_M) obtained by multiplying a difference between the refractive index of the particles (n_A) and the average refractive index of the binder matrix (n_M) by a quotient dividing the content of the particles in the antiglare layer (w_A) by the content of the binder matrix in the antiglare layer (w_M) is in the range of 0.0015-0.003.

The invention discloses a car head-up display system. The car head-up display system comprises a car front windshield, an instrument and a flexible OLED displayer. The flexible OLED displayer is connected with the instrument and attached to the side, located inside a car, of the car front windshield. The flexible OLED displayer is directly attached to the car front windshield through the flexible OLED display technology; through a direct type display method, human eyes can directly observe instrument information displayed by the flexible OLED displayer, and therefore the car head-up display effect is achieved. Due to the fact the self light emitting display mode is adopted for the flexible OLED displayer, the flexible OLED displayer can achieve the high contrast ratio effect without being adjusted to be high in brightness under the high outdoor sunshine, power consumption is low, view limitation does not exist, and the display effect is good. A complex optical system is not needed to adjust imaging, and the car head-up display system is simple in structure. The invention further discloses the car with the car head-up display system.