摘要:
A track jump method for an optical recording/reproducing medium is provided. In the track jump method, once a track jump command is input, a track jump operation is held until a falling edge of a header mask signal is detected. The track jump starts at the falling edge of the header mask signal and ends before a rising edge of the header mask signal so that a TZC signal is not influenced by a header during the track jump. Therefore, the track jump can be exactly and stably performed. In particular, when the track jump command is input, a PLL of a wobble signal is inhibited, and a PLL-wobble signal is held to a previous value obtained before the track jump is performed, during the track jump, or a header mask signal is generated using a read channel signal which is not influenced by a wobble period, until a wobble signal becomes stable after a trackjump. During a normal servo, a header mask signal is generated using a PLL-wobble signal to mask a header area. Therefore, a header area coming first after the trackjump is completed can be stably masked, thereby preventing a system from being unstable due to a header during the track jump.
摘要:
Disclosed is a method and apparatus for controlling the record and reproduction of optical record medium in which plural non-record regions having different phase are arranged between recordable data regions for the distinction in the shape of the data region. The method and apparatus performs the servo using focus error signal and tracking error signal averaged by the low pass filter at the header region of the optical disc. Especially, the tracking servo is performed by holding a fixed DC off-set value at the header region existing on the L/G switching or holding the tracking error value of the previous same track region. As a result, the exact header region is detected, the track sliding phenomenon is removed, and the tracking servo is stabilized, resulting in preventing the degeneration of the record and reproduction characteristics.
摘要:
There is provided a method of recording and reproducing an optical recording medium which performs a tracking servo and a focusing servo by irradiating a laser beam onto determined positions including lands and grooves of a track of the recording medium and detecting a tracking error signal and a focusing error signal using an electric signal from an optical pickup for picking up the laser beam reflected from the recording medium. The method includes the steps of: detecting servo information in a plurality of the determined positions including lands and grooves of the track while rotating the recording medium in a state in which only the focus servo is turned on when the optical recording medium is loaded, storing the servo information of the respective determined positions as a table, and performing the servo of the corresponding positions by applying the servo information in table during an actual data recording/reproduction.
摘要:
A side view LED includes an insulating substrate, and first and second metal layers each having first and second areas spaced apart from each other at a predetermined gap and disposed on top and underside surfaces of the insulating substrate, respectively. First and second electrical connectors are formed in a thickness direction of the insulating substrate, connecting the first area of the first metal layer to that of the second metal layer, and the second area of the first metal layer to that of the second metal layer. An LED chip is mounted on the first metal layer and electrically connected to the first and second areas. Also, a wall part is attached to the first metal layer to form an opened area around the LED chip. A protective device is mounted on an underside surface of the second metal layer and electrically connected to the first and second areas.
摘要:
Disclosed is a liquid container adapted to store liquefied natural gas (LNG). The LNG storage container include a sealing wall directly contacting liquid contained in the tank and a structural wall, which is an exterior wall or inner structure integrated with the exterior wall. The container further includes a plurality of connectors mechanically connecting the sealing wall and the structural wall and an intermediate wall structure positioned between the structural wall and the interior wall. The intermediate wall structure is configured to move relative to at least one of the interior wall and the structural wall
摘要:
The invention relates to a side-emission type LED package capable of minimizing light loss to achieve high luminance and to a backlight unit using the same. The LED package includes a lead frame with an electrode formed thereon and a light emitting diode chip disposed on the lead frame. The LED package further includes a body made of molded material surrounding the light emitting diode chip disposed on the lead frame, the body having an asymmetrical shape; and a reflecting part extended from a side of the body to downwardly reflect light emitted from the light emitting diode chip. The reflecting part is extended from the upper edge of the body housing the LED chip to effectively block light from leaking outside, thereby achieving high-luminance emission.
摘要:
Disclosed is a liquid container adapted to store liquefied natural gas (LNG). The LNG storage container include a sealing wall directly contacting liquid contained in the tank and a structural wall, which is an exterior wall or inner structure integrated with the exterior wall. The container further includes a plurality of connectors mechanically connecting the sealing wall and the structural wall and an intermediate wall structure positioned between the structural wall and the interior wall. The intermediate wall structure is configured to move relative to at least one of the interior wall and the structural wall
摘要:
The present invention relates to a light source-guide structure having an LED as a light source and a backlight apparatus having the same. The light source-guide structure includes a light guide plate with grooves formed in a peripheral side thereof and a light source having a transparent package fitted into the groove of the light guide plate with an LED chip inside the transparent package. The structure also includes a wiring substrate for seating the LED chip and reflecting the light from the LED chip to the light guide plate and a reflection layer attached on upper surfaces of the light source and the light guide plate. With the light source inserted into the light guide plate, the loss of light is minimized while the horizontal beam angle of light from the LED is increased, minimizing the peripheral area.
摘要:
Disclosed is a reinforced matrix for a molten carbonate fuel cell comprising a porous aluminum support and a lithium aluminate tape-cast on the porous aluminum support. Further, disclosed is a method for preparing the molten carbonate fuel cell comprising the reinforced matrix comprising steps of tape-casting a lithium aluminate on a porous aluminum support so as to prepare a reinforced matrix (S1), making a unit cell or a stack of the unit cells using the reinforced matrix (S2) and heat treating the unit cell or the stack so as to oxidize aluminum in the support into lithium aluminate (S3). According to the present invention, the method is simple and economic, and the mass production of the matrix is easy, and strength of the matrix can be increased effectively and therefore there is no worry about fracture or crack.
摘要:
A side view LED package for a backlight unit includes a package body having a cavity with an inclined inner sidewall, first and second lead frames arranged in the package body, the cavity of the package body exposing a portion of at least one of the first and second lead frames placed in a bottom of the cavity to outside, a light emitting diode chip mounted on the bottom of the cavity to be electrically connected to the first and second lead frames, and a transparent encapsulant arranged in the cavity surrounding the light emitting diode chip. The cavity has a depth larger than a mounting height of the light emitting diode chip and not exceeding six times of the mounting height. The height of the sidewall is shortened to improve beam angle characteristics of emission light, increase light quantity, and prevent a molding defect of the sidewall.