Laser liquid crystal marker and method for judging deterioration of
liquid crystal
    1.
    发明授权
    Laser liquid crystal marker and method for judging deterioration of liquid crystal 失效
    激光液晶标记及判断液晶劣化的方法

    公开(公告)号:US5896163A

    公开(公告)日:1999-04-20

    申请号:US549744

    申请日:1995-11-07

    IPC分类号: B23K26/06 B23K26/42 B41J2/47

    CPC分类号: B23K26/066 B23K26/702

    摘要: A laser liquid crystal marker and a method of judging deterioration of the liquid crystal make it possible to maintain high printing accuracy, ascertain the proper time for replacement of liquid crystal and, further, maintain high printing accuracy even when high speed printing is continuously performed. The marker has a temperature sensor (4), light emitting means (5), light receiving means (6), and a controller (7). The controller (7) calculates a light transmittance (Qi) from the irradiation quantity of light (R1) of the light emitting means (5) and the transmitted quantity of light (R2) received by the light receiving means (6), and adjusts the applied voltage (Vi) of the liquid crystal (2) so that the light transmittance (Qi) becomes equal to an optimum light transmittance (Qo), stored in advance. Further, when the light transmittance (Qi) does not become equal to the optimum light transmittance (Qo), even by adjusting the voltage (Vi) applied to the liquid crystal, it is determined that the liquid crystal (2) has deteriorated.

    摘要翻译: PCT No.PCT / JP94 / 00703 Sec。 371日期:1995年11月7日 102(e)日期1995年11月7日PCT 1994年4月27日PCT PCT。 第WO94 / 26457号公报 日期1994年11月24日激光液晶标记和判断液晶劣化的方法使得可以保持高的印刷精度,确定适当的液晶更换时间,并且即使在高速下也能保持较高的印刷精度 连续执行打印。 标记具有温度传感器(4),发光装置(5),光接收装置(6)和控制器(7)。 控制器(7)根据发光装置(5)的光(R1)的照射量和由光接收装置(6)接收的透光量(R2)计算光透射率(Qi),并调整 液晶(2)的施加电压(Vi),使得透光率(Qi)等于预先存储的最佳透光率(Qo)。 此外,通过调整施加于液晶的电压(Vi),透光率(Qi)也不会变得与最佳透光率(Qo)相等时,判定为液晶(2)劣化。