Abstract: A printed circuit board (PCB) having an individual reflective structure and a method for manufacturing a light emitting diode (LED) package using the same, which can prevent reabsorption of light between LED chips by providing an individual reflective structure between the LED chips when the LED package is configured using two or more LED chips. The PCB includes a PCB; a wiring pattern-forming material layer formed on the PCB with an insulating layer interposed therebetween; dams formed on the wiring pattern-forming layer around chip mounting areas of the PCB; and a light reabsorption prevention dam formed on the wiring pattern-forming material layer between the chip mounting areas where LED chips are mounted.

Abstract: A metal printed circuit board (PCB) having a hole reflective surface and a method for manufacturing the same, in which a process of forming a reflective surface by performing surface treatment on a metal plate and a process of bonding a PCB having a hole are performed as a single process, thus simplifying the manufacturing process and increasing the applicability of a product. The metal PCB includes a metal plate having a first reflective surface formed on a chip bonding area by surface treatment; a PCB layer stacked on the metal plate and having a hole and a wiring pattern which are formed in the chip bonding area; a second reflective surface formed on the inner side of the hole of the PCB layer; and a dam formed around the hole on the PCB layer.

Abstract: A light emitting diode package includes a heat-dissipating substrate including a reflective groove having a lower bottom surface, an upper opening having a width greater than the lower bottom surface, and an inclined surface formed between the upper opening and the lower bottom surface and mounting grooves, each formed in the reflective groove and having a lower bottom surface, an upper opening having a width greater than the lower bottom surface, and an inclined surface formed between the upper opening and the lower bottom surface; an insulating layer selectively formed on the heat-dissipating substrate; wiring pattern layers formed on the insulating layer and extending to bottom surfaces of the mounting grooves to be selectively formed thereon; a light emitting diode chip mounted in each of the mounting grooves; and a molding layer formed around the light emitting diode chip.

Abstract: A battery driven communications terminal, paging receiver, capable of an internal time backup function may be constructed with a manual backup operation in which the internal time is stored to a non-volatile memory in response to user selection of a BACKUP key as backed-up time information; and an automatic backup operation in which the internal time is stored to the memory when the voltage level of a battery is low. If a controller is reinitialized in response to restoration of the source voltage, the backed-up time information, stored as described above, is set as the internal time and displayed.

Abstract: There is disclosed a circuit for stabilizing the bias of a paging receiver. An oscillation control signal of first period is generated at the time when a voltage source is connected to the RF components. An oscillation means generates a signal of the center frequency of a received modulated signal in response to the oscillation control signal. A demodulation means demodulates the signal of the center frequency so as to generate a signal of second voltage that is received by a waveform reshaping means to stabilize the bias into the level of the second voltage. The RF receiver converts the received RF modulated signal into a signal offset by a frequency deviation from the center frequency during second period after the termination of the first period. The demodulation means generates a demodulated signal of first or third voltage according to the logical state of the received modulated signal.

Abstract: A paging receiver for automatically dialing a stored telephone number can consider an area code. A received telephone number stored into a memory corresponding to a number of depressions of a read key is displayed when the read key is depressed, and an area code stored into the memory corresponding to the number of depressions of an area key is displayed when the area key is depressed. Then, when the area code and the telephone number are displayed, an unnecessary extension number, etc., is erased by using an editing key. Thereafter, the area code and the telephone number are converted into a DTMF signal when a dial key is depressed and the DTMF signal is applied to an electronic exchange through a telephone, thereby performing automatic dialing.