Young Optics Inc.

Alpha Networks Inc.

D-link Corporation

Wei-Hung Tsai

Ya-Ling Hsu

Wen-Hao Hsu

Chih-Hsien Tsai

Chao-Shun Chen

Ming-Chi Chen

Hung-Chih Chou

Ching-Lun Lin

Pao-Ching Hu

Tien-Hsiung Tung

Hung-Chi Su

Ping-Sung Kuan

Mei-Yi Chen

Hsiu-Chu Tsao

Fang Yu

Mei-Chuan Chen

An airflow detection device for detecting whether an air output path is obstructed can be mounted in the air output path and includes a carrying portion, a metallic sensing portion and a metallic air plate portion that are respectively positioned on the carrying portion and have different electrode polarities, so as to detect obstruction of the air output path. The airflow detection device can be applied to products located in remote areas, mountain areas, or other places where maintenance workers cannot inspect the products frequently for the state of their dust screens or ventilation holes, and can help warn of conditions such as ventilation hole obstruction to avoid product overheating due to dust or dirt accumulation on dust screens or ventilation hole obstruction, adverse impacts on product performance, service live or stability, or system crash.

Airflow detection device for detecting whether air output path is obstructed

An optical device includes a waveguide device, a reflective-type light valve and a projection lens. The waveguide device receives a first polarized beam and includes a first surface, a second surface and the first grating. The first grating is disposed in a path of the first polarized beam to change a propagation direction of the first polarized beam, and the first polarized beam passes through the first surface, the first grating and the second surface in succession. The reflective-type light valve is disposed downstream from the second surface of the waveguide device to convert the first polarized beam into an image beam. The projection lens is disposed downstream from the reflective-type light valve, and the image beam passing through the second surface of the waveguide device, the first grating and the projection lens in succession.

Optical device

A lamp device includes a light source, a slide and a projection lens assembly. The light source generates an illumination beam, and the slide is disposed in a light path of the illumination beam. The slide has a profile image layer and a gradient layer, and the profile image layer and the gradient layer are disposed on two opposite sides of the slide. The profile image layer converts the illumination beam into profile image light without gradients, and the gradient layer converts the illumination beam into gradient light. The projection lens assembly receives and projects the gradient light and the profile image light.

Lamp device

A projection film and a projection device are provided. The projection film includes a pattern layer, a first light-transmission layer, a second light-transmission layer and a plurality of light-transmission particles. The pattern layer includes a light-transmission portion and a non-light-transmission portion. The first light-transmission layer is disposed below the pattern layer. The second light-transmission layer is disposed below the first light-transmission layer. The light-transmission particles are disposed between the first light-transmission layer and the second light-transmission layer. The impurity generated by the light-transmission particles will be reduced by utilizing a second light-transmission layer having a refractive index close to the refractive index of the light-transmission particles.

Projection film and projection device

A projection device is disposable into a display platform of a display rack having a plurality of display platforms, for directly projecting an image frame onto a projection screen of the display platform. The image frame projected to the projection screen is not reflected by any reflective mirror arranged between the projection device and the projection screen. A length of the image frame in a first direction is equal to at least ten times a length of the image frame in a second direction. Since no reflective mirror is arranged between the projection device and the projection screen, the projection device is more easily applicable to display racks.

Projection system, projection device and display rack

An image rearranging lens and a projection apparatus are provided. The image rearranging lens is used to rearrange a plurality of sub images provided by an image source and arranged along an arranging direction. The image rearranging lens includes a plurality of lens groups arranged along the arranging direction. Each of the sub images is imaged on a corresponding lens group. Optical axes of the lens groups are not aligned to each other along the arranging direction. The optical axis of each of the lens groups and the optical axis of the neighboring lens groups have an offset along a direction perpendicular to the arranging direction.

Image rearranging lens and projection apparatus

The present invention is to provide a method applicable to a fiber-optic transceiver including a transmitter optical subassembly (TOSA) provided therein with a laser diode, but without a monitoring photodiode, a laser driver controlled by a controller IC for driving the laser diode to generate a laser beam, and a thermal sensor for sensing temperature of the laser diode. The method includes executing an approximation process to characteristic data, i.e. threshold currents of the laser diode at a plurality of specific temperatures and corresponding slope efficiencies (SE), provided by manufacturer for obtaining relationship therebetween over entire temperature range, manually adjusting operation parameters (such as bias current and modulation current) of the laser diode for generating expected optical power and extinction ratio at a normal temperature and for subsequently determining the operation parameters over the entire temperature range, and writing the relationship and operation parameters thus obtained into the controller IC.

Method for controlling optical power and extinction ratio over entire temperature range

The present invention is to provide a cooling element for eliminating electromagnetic noise, which is formed by bending a plate into a symmetric structure symmetrically comprising a contact part being in connect with an electronic component to absorb heat and noise radiated therefrom; an extension part having one end connected with said contact part to absorb heat and noise from said contact part; and a dissipation part connected with the other end of said extension part to absorb heat and noise from said extension part; wherein the noises absorbed by the cooling element are transmitted along the paths among the contact part, extension part and the dissipation part, and are mutually offset with each other in accordance with the symmetric structure thereof.

Cooling element for eliminating electromagnetic noise

The present invention is to provide an apparatus of automatically detecting the type of a cable connected to a network and method thereof, which comprising a memory having an automatic detection program, a switch, a network controller adapted to switch the state of the switch based on a predetermined switching order stored in the automatic detection program, a port having its state being detected by the network controller such that the automatic detection program is able to know the type of a compatible cable by connecting a connector at one end of the cable to the port, and a plurality of transmission interfaces interconnected the network controller and the switch wherein the network apparatus is adapted to receive network signals transmitted from the cable and maintain a connecting state of one transmission interface.

Apparatus of automatically detecting type of cable connected to network and method thereof

An intelligent apparatus comprises a master module and a plurality of slave modules each having a CPU, a control circuit and an associated software, wherein each of the slave modules is in communication with the master module, and the CPU of the master module may control the CPUs of the slave modules respectively to form a single system. When the master module detects that a monitoring device coupled to a single user I/O interface installed in the apparatus is performing network monitoring and management with respect to a certain module, the CPU of the master module may transfer an access right of the user I/O interface to the certain module by closing or opening switches installed in the master modules enabling the certain module to receive the access signal from the user I/O interface by closing a switch thereof.

Intelligent apparatus for sharing a user I/O interface among all intelligent modules thereof

A dual speed hub includes a CPU, two hubs of different transmission speeds, two MACs (media access controls), and a switch, wherein the CPU periodically sends a test packet in proper order through one MAC, one hub, the switch and the other hub to the other MAC, then checks the receiving condition and the content of the returned test packet, then determines the normality of the function of the switch subject to the receiving condition and the content of the returned test packet, and then provides a warning signal to a network management system when the switch is judged abnormal, informing the network manager to repair the switch.

Growing community of inventors

Hsinchu, Taiwan

Wei-Hung Tsai