Abstract: Wide angle lens for imaging objects disposed away from the optical axis towards the periphery of the field of view.

Abstract: Wide angle lens for imaging objects disposed away from the optical axis towards the periphery of the field of view.

Abstract: Wide angle lens for imaging objects disposed away from the optical axis towards the periphery of the field of view.

Abstract: An image pickup lens comprises a first lens having negative refractive power, a second lens having positive refractive power, a third lens having negative refractive power, a fourth lens having positive refractive power, and a fifth lens having negative refractive power, from an object side to an image side. The image pickup lens has an optical axis. A portion of a surface of the first lens facing the object side and close to the axis is convex, a portion of a surface of the first lens facing the image side and close to the axis is concave. A portion of a surface of the fourth lens facing the object side and close to the axis is convex, a portion of a surface of the fourth lens facing the image side and close to the axis is convex. The image pickup lens has large field of view and small volume.

Abstract: An optical lens of the present disclosure assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, an optical filter and an optical sensor. The first lens element, the fourth lens element and the fifth lens element each have positive power. The second lens element, the third lens element and the sixth lens element each have negative power.

Abstract: An optical lens of the present disclosure assembly includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, an optical filter and an optical sensor. The first lens element, the fourth lens element and the fifth lens element each have positive power. The second lens element, the third lens element and the sixth lens element each have negative power.

Abstract: A wide-angle lens includes a first lens group, a second lens group, and an aperture arranged in that sequence from object side to image side. The first lens group as a whole has a positive refractive power, and includes a first lens, a second lens, a third lens, and a fourth lens. The first lens has a negative refractive power. The second lens has a negative refractive power. The third lens has a negative refractive power. The fourth lens has a positive refractive power. The second lens group as a whole has a positive refractive power, and includes a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The fifth lens has a positive refractive power. The sixth lens has a negative refractive power. The seventh lens has a positive refractive power. The eighth lens has a positive refractive power.

Abstract: An image pickup lens comprises a first lens having negative refractive power, a second lens having positive refractive power, a third lens having negative refractive power, a fourth lens having positive refractive power, and a fifth lens having negative refractive power, from an object side to an image side. The image pickup lens has an optical axis. A portion of a surface of the first lens facing the object side and close to the axis is convex, a portion of a surface of the first lens facing the image side and close to the axis is concave. A portion of a surface of the fourth lens facing the object side and close to the axis is convex, a portion of a surface of the fourth lens facing the image side and close to the axis is convex. The image pickup lens has large field of view and small volume.

Abstract: A wide-angle lens includes a first lens group, a second lens group, and an aperture arranged in that sequence from object side to image side. The first lens group as a whole has a positive refractive power, and includes a first lens, a second lens, a third lens, and a fourth lens. The first lens has a negative refractive power. The second lens has a negative refractive power. The third lens has a negative refractive power. The fourth lens has a positive refractive power. The second lens group as a whole has a positive refractive power, and includes a fifth lens, a sixth lens, a seventh lens, and an eighth lens. The fifth lens has a positive refractive power. The sixth lens has a negative refractive power. The seventh lens has a positive refractive power. The eighth lens has a positive refractive power.

Abstract: A wide-angle lens includes a first lens group having a positive refractive power, a second lens group having a positive refractive power and an aperture. The first lens group, the aperture and the second lens group are arranged in sequence from the object side to the image side. The first lens group includes five lens, and the second lens group includes four lens.

Abstract: A zoom lens includes, in order from an object side to an image side, a first lens group, an aperture, and a second lens group. The first lens group has negative refractive power, and is composed of a negative first lens, a negative second lens, and a positive third lens. The third lens and the second lens are adhered together to form a negative doublet. The second lens group has positive refractive power, and is composed of a positive fourth lens, a negative fifth lens, a positive sixth lens, a positive seventh lens, a negative eighth lens, and a positive ninth lens. The sixth lens and the fifth lens are adhered together to form a negative doublet. In addition, the first lens group can be moved between the object side and the aperture, while the second lens group can be moved between the aperture and the image side.

Abstract: A zoom lens includes a negative first lens group, an aperture, and a positive second lens group. The first lens group includes a negative first lens, a negative second lens, and a positive third lens. The second lens group includes a positive fourth lens, a negative fifth lens, a negative sixth lens, and a positive seventh lens, wherein the fifth lens is formed by adhering a positive lens and a negative lens, and the sixth lens is a meniscus lens. The zoom lens can be switched toward a telephoto mode from a wide mode by moving the second lens group from the image side toward the object side.

Abstract: A zoom lens includes a negative first lens group, an aperture, and a positive second lens group. The first lens group includes a negative first lens, a negative second lens, and a positive third lens. The second lens group includes a positive fourth lens, a negative fifth lens, a negative sixth lens, and a positive seventh lens, wherein the fifth lens is formed by adhering a positive lens and a negative lens, and the sixth lens is a meniscus lens. The zoom lens can be switched toward a telephoto mode from a wide mode by moving the second lens group from the image side toward the object side.

Abstract: A digital television (TV) including a display terminal, a TV chip and an image driving circuit is provided. The display terminal includes multiple adjacent rows of pixels. The TV chip includes a digital TV decoder, a data stream decoder, a scaler and a color space converting circuit. The digital TV decoder outputs a data stream according to an interlaced TV signal. The data stream decoder decodes the data stream to output an interlaced image. The scaler outputs a scaled image according to the interlaced image. The color space converting circuit outputs color pixel data according to the scaled image. The image driving circuit simultaneously turns on the rows of pixels, and writes the color pixel data into the rows of pixels to display a de-interlaced image.

Abstract: A dynamic gamma control method for an LCD is provided. The LCD displays a present frame by a plurality of gamma reference voltages and the present frame includes an R-pixel data sum, a G-pixel data sum and a B-pixel data sum which are obtained by respectively adding all R-pixel data, all G-pixel data and all B-pixel data of at least one pixel of the present frame. The method includes steps of: weighting the R-pixel data sum, the G-pixel data sum and the B-pixel data sum with a first, a second and a third parameters respectively and adding them up to obtain a gamma indication value, and choosing a suitable one from the plurality of gamma reference voltages to display the present frame thereby if the gamma indication value is equal to a gamma reference value formed by adding the first, the second and the third parameters up.

Abstract: An LCD driving circuit and method for increasing effective bit(s) of the source driver is disclosed. A reference voltage generator generates a group of compensated reference voltage levels that are interlaced with original reference voltage level of original reference voltage generator. One of the multiple groups of reference voltage levels is selected by one or more least significant bits (LSBs), and is then inputted to digital-to-Analog converter of the source driver under control of the one or more least significant bits (LSBs), thereby effectively and economically enhancing the gray levels of the display on the LCD panel.

Abstract: A dynamic gamma control method for an LCD is provided in the present invention. The LCD displays a present frame by a plurality of gamma reference voltages and the present frame includes an R-pixel data sum, a G-pixel data sum and a B-pixel data sum which are obtained by respectively adding all R-pixel data, all G-pixel data and all B-pixel data of at least one pixel of the present frame. The method includes steps of: weighting the R-pixel data sum, the G-pixel data sum and the B-pixel data sum with a first, a second and a third parameters respectively and adding them up to obtain a gamma indication value, and choosing a suitable one from the plurality of gamma reference voltages to display the present frame thereby if the gamma indication value is equal to a gamma reference value formed by adding the first, the second and the third parameters up.

Abstract: An LCD driving circuit and method for increasing effective bit(s) of the source driver is disclosed. A reference voltage generator generates a group of compensated reference voltage levels that are interlaced with original reference voltage level of original reference voltage generator. One of the multiple groups of reference voltage levels is selected by one or more least significant bits (LSBs), and is then inputted to digital-to-Analog converter of the source driver under control of the one or more least significant bits (LSBs), thereby effectively and economically enhancing the gray levels of the display on the LCD panel.