Abstract: An image system adapted to a projection display apparatus includes a first lens group having a negative refractive power, a second lens group having a positive refractive power, an aspheric reflector, and a curved reflector. The second lens group includes an aspheric lens which is the nearest to the light valve in the second lens group. A material of the aspheric lens includes glass, the thermal-optical coefficient of the glass is between 1.0×10?6/K and 12.5×10?6/K, and the refractive index of the glass is between 1.482 and 1.847. The aspheric reflector is disposed front of the first lens group for reflecting the image beam passing through the first lens group and second lens group. The curved reflector is disposed above the first lens group for reflecting the image beam reflected by the aspheric reflector onto the screen. The image system has a good imaging quality.

Abstract: A brightness enhancement sheet including a light transmissive substrate, a plurality of strip prisms, and a plurality of protruding structures is provided. The light transmissive substrate has a first surface and a second surface opposite to the first surface. The strip prisms are disposed on the first surface. Each of the strip prisms has two prism surfaces, and a junction of the two prism surfaces forms a crest line, and a valley line is formed between each of the two adjacent strip prisms. Each of the protruding structures has two wing portions. The two wing portions are respectively disposed on two prism surfaces of the corresponding strip prism. A junction of the two wing portions forms a protruding end. The protruding end protrudes from the crest line of the corresponding strip prism. Each of the wing portions extends from the protruding end to the valley line.

Abstract: A method for reducing power consumption for an integrated circuit comprises the steps of (1) providing (i) a clock tree wherein the clock tree comprises a clock source, a plurality of clock sinks, and a plurality of internal nodes, (ii) the physical locations of the clock source, the clock sinks, and physical location of a gating-signal control logic circuit, (iii) the activity information of the sinks; (2) recursively determining a merging segment set containing merging segments for each internal node and computing switched capacitance of a subtree rooted at each internal node in a bottom up manner, wherein the merging segments have the same signal delay for the clock sinks in a subtree rooted at each internal node; and (3) recursively determining a location for each internal node selected from the merging segment set in a top down manner on a basis that the switched capacitance of a subtree rooted at each internal node is minimum.

Abstract: A placement tool generates an optimal placement for a plurality of device modules within an analog integrated circuit (IC) subject to device matching, symmetry, and proximity constraints by first defining a multiple-level hierarchy of constraint groups, wherein each constraint group consists of elements that are subject to one of the placement constraints. Each element of each constraint group consists of either of one of the device modules or another one of the constraint groups residing at a lower level of the hierarchy. The tool then generates a hierarchical B*-tree representation of a trial placement for the IC including a separate node representing each constraint group of the hierarchy and a separate node for each of device module not included in any of the constraint groups.

Abstract: An image system adapted to a projection display apparatus includes a first lens group having a negative refractive power, a second lens group having a positive refractive power, an aspheric reflector, and a curved reflector. The second lens group includes an aspheric lens which is the nearest to the light valve in the second lens group. A material of the aspheric lens includes glass, the thermal-optical coefficient of the glass is between 1.0×10?6/K and 12.5×10?6/K, and the refractive index of the glass is between 1.482 and 1.847. The aspheric reflector is disposed front of the first lens group for reflecting the image beam passing through the first lens group and second lens group. The curved reflector is disposed above the first lens group for reflecting the image beam reflected by the aspheric reflector onto the screen. The image system has a good imaging quality.

Abstract: A placement tool generates an optimal placement for a plurality of device modules within an analog integrated circuit (IC) subject to device matching, symmetry, and proximity constraints by first defining a multiple-level hierarchy of constraint groups, wherein each constraint group consists of elements that are subject to one of the placement constraints. Each element of each constraint group consists of either of one of the device modules or another one of the constraint groups residing at a lower level of the hierarchy. The tool then generates a hierarchical B*-tree representation of a trial placement for the IC including a separate node representing each constraint group of the hierarchy and a separate node for each of device module not included in any of the constraint groups.

Abstract: A method for reducing power consumption for an integrated circuit comprises the steps of (1) providing (i) a clock tree wherein the clock tree comprises a clock source, a plurality of clock sinks, and a plurality of internal nodes, (ii) the physical locations of the clock source, the clock sinks, and physical location of a gating-signal control logic circuit, (iii) the activity information of the sinks; (2) recursively determining a merging segment set containing merging segments for each internal node and computing switched capacitance of a subtree rooted at each internal node in a bottom up manner, wherein the merging segments have the same signal delay for the clock sinks in a subtree rooted at each internal node; and (3) recursively determining a location for each internal node selected from the merging segment set in a top down manner on a basis that the switched capacitance of a subtree rooted at each internal node is minimum.

Abstract: In order to prevent infrared from reducing image quality of an image reception device, the present invention discloses a camera lens capable of filtering infrared light. The camera lens includes a barrel, an aperture installed on the barrel for controlling the amount of input light, and an optical lens installed inside the barrel for filtering infrared and performing optical lens.

Abstract: A method for designing and manufacturing lens modules includes selecting design parameters from a design database stored with the design parameters suitable for a lens module desired to be manufactured to design the lens module according to characteristics of the lens module and storing the design parameters of the lens module in an analysis database, analyzing the lens module based on a predetermined analysis process to generate analysis parameters corresponding to the lens module and storing the generated analysis parameters in the analysis database, and re-designing the lens module based on the analysis parameters stored in the analysis database.

Abstract: A method for designing and manufacturing lens modules includes selecting design parameters from a design database stored with the design parameters suitable for a lens module desired to be manufactured to design the lens module according to characteristics of the lens module and storing the design parameters of the lens module in an analysis database, analyzing the lens module based on a predetermined analysis process to generate analysis parameters corresponding to the lens module and storing the generated analysis parameters in the analysis database, and re-designing the lens module based on the analysis parameters stored in the analysis database.

Abstract: Method for the preparation of holographic diffusers where the holographic diffuser is designed through iterative calculations according to the Fraunhofer theory of diffraction and some constrain conditions. In the iterative calculation some constrain conditions that can change the magnitude of the light passing through the diffuser are used to design the diffuser. A novel iterative calculation is disclosed such that uniformed mixing of colors and high light utilization efficiency of the diffuser may be provided.

Abstract: A foldable screen display for displaying screen images is disclosed which comprises: (a) at least two sub-displays; (b) a hinging member for pivotally connecting the sub-displays together on a side-by-side manner; (c) a magnifying optical element provided on top of each of the sub-displays, the magnifying optical element providing a magnifying power of between about 1.05 and about 1.3 so as to cause images displayed on the sub-displays to be perceived by a user as if they were from a single display; and (d) a membrane covering both of the sub-displays and the hinging member, the membrane being made of a transparent and resilient material. In a preferred embodiment, the magnifying optical element is a zone plate type magnifying optical element and is constructed to provide a magnifying power approximately equalling to one plus the ratio between the width of the hinging member and the width of sub-display.