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    • 7. 发明授权
    • Optical disk device and emission current adjusting method for the same
    • 光盘装置和发射电流调节方法相同
    • US07313077B2
    • 2007-12-25
    • US11033959
    • 2005-01-13
    • Eisuke IshibashiYasuhiro WadaShinya ShimizuToshiya Akagi
    • Eisuke IshibashiYasuhiro WadaShinya ShimizuToshiya Akagi
    • G11B7/00
    • G11B7/1263G11B7/00456
    • A ratio of an erase current and a peak current when starting recording is defined as K=iER/iPK (S1), and iER11 is set equal to K×iPK1, and an ideal value iER11 of an erase current that should be increased according to a temperature change is determined (S2). A value obtained by subtracting a current iBT at a bottom level emission intensity when starting recording from a current at an erase level emission intensity after the temperature rises is defined as iER1. By measuring this iER1, an ideal value iER11 of the erase current is subtracted from iER1, and the resultant current is defined as iBT11 (S3). This iBT11 is set as an adjustment value of the bottom current, and a value obtained by adding this adjustment value to a bottom current when starting recording is set as a bottom current after change.
    • 开始记录时的擦除电流和峰值电流的比率被定义为K = iER / iPK(S 1),并且将iER11设置为等于KxiPK 1,并且将擦除电流的理想值iER 11设置为相应于 确定温度变化(S 2)。 通过从温度升高后的擦除电平发射强度的电流开始记录时减去以下电平发射强度的电流iBT而获得的值被定义为iER 1。 通过测量这个iER 1,从iER 1中减去擦除电流的理想值iER 11,结果电流定义为iBT 11(S 3)。 将该iBT11设定为底部电流的调整值,将开始记录时将该调整值与底部电流相加得到的值设定为变更后的底部电流。