Abstract: High-power remote phosphor white LED heat-dissipation package relates to an LED heat-dissipation package, for solving the problem of poor heat dissipation of LED package structures. The substrate of the package structure is provided with a boss and a heat conducting ring, and the phosphor structural layer contains hollow glass microspheres. The white LED heat-dissipation package structure in the present invention improves the spatial chroma uniformity of the white light by using the hollow glass microspheres, thereby reducing the costs. The package structure can improve the heat dissipation efficiency of the chip and the utilization ratio of light emitted from the chip. The present invention is applicable to prepare high-power remote phosphor white LEDs.

Abstract: A visible light communication system based on LED illumination, comprising: a visible light generating module configured to convert data to be transmitted into a visible light digital signal; a visible light control module configured to set a visible light emitting state of the visible light generating module; a visible light encoding module configured to receive the visible light digital signal, and encode the visible light digital signal; a visible light receiving module configured to communicate with a mobile terminal; and a visible light emitting module configured to transmit the encoded optical signal to the visible light receiving module.

Abstract: Methods for providing data security are described. A security device (10) and a plug-in device (30) work in conjunction to enable encryption and decryption of data. A secret is stored by one of the security device (10) or the plug-in device (30). While the secret is required for constructing a key, the key cannot be constructed from the secret alone. Unauthorized devices or users are thereby prevented from accessing the key.