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US 7,460,458 B2Granted
Apparatus and method for generating write pulse appropriate for various optical recording media
AssigneeSamsung Electronics Co., Ltd.
InventorJin-gyo Seo
Life of this patent
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Abstract
A control signal generator of a light emitting device includes a driving unit to drive the light emitting device and a voltage divider to divide voltages, outputting a power control signal, wherein the power control signal is provided as an auxiliary power control signal to the driving unit so as to increase a number of power control signals to automatically provide automatic power control of the light emitting device.
Claims4
A control signal generator of a light emitting device, comprising:
- a driving unit to drive the light emitting device;
- a voltage divider to divide voltages, outputting a power control signal,
- wherein the power control signal is provided as an auxiliary power control signal to the driving unit so as to increase a number of power control signals to automatically provide automatic power control of the light emitting device, and
- a control unit to generate and transmit a control signal to the driving unit in order to change an entire level or a partial level of a multi-pulse interval generated by the light emitting device,
- wherein auxiliary power control signal bits in a register file of the control unit control whether the auxiliary power control signal is generated and control a pulse type of the auxiliary power control signal based on received information on a type and recording speed factor of a received optical recording medium.
2 more elements
A control signal generator of a light emitting device, comprising:
- a laser diode;
- a unit determining a condition of a combination of pulses to be generated;
- a unit obtaining at least one signal by combining pulses generated according to a determined combination condition as a control signal;
- and
- a control unit to generate and transmit a control signal to drive a laser diode driving unit to change an entire level or a partial level of a multi-pulse interval generated by the laser diode,
- wherein the unit obtaining at least one signal further selects and determines a type of multi-pulse to be generated in a multi-pulse interval as at least one of a plurality of non-multi-pulse types and at least one of a plurality of multi-pulse train types.
3 more elements
An automatic power control of a light emitting device, comprising:
- a laser diode;
- a current or voltage changing unit, to vary a level of a light pulse generated by the light emitting device by increasing or decreasing a current or voltage to automatically control the laser diode in accordance with predetermined factors;
- and
- a control unit to generate and transmit a control signal to a driving unit in order to change an entire level or a partial level of a multi-pulse interval generated by the light emitting device,
- wherein auxiliary power control signal bits in a register file of the control unit control whether an auxiliary power control signal is generated and control a pulse type of the auxiliary power control signal based on received information on a type and recording speed factor of a received optical recording medium.
2 more elements
Dependencies are inferred from the claim text.