液晶显示电话机耗电较大是其较大的缺陷,三节5号电池需经常更换,费时费钱。鉴于此,笔者参阅有关电路对其供电电源进行了改进,经在HA8688型电话机使用证明效果良好。改进电路如图1所示。此电源保留电池供电,以78L05为核心组成。挂机状态IC在为液显电路供电的同时,经IC、D向电池缓慢充电, LCD display phone is a larger power consumption of its larger defects, three batteries on the 5th need to be replaced frequently, time-consuming and expensive. In view of this, I refer to the circuit for its power supply has been improved, the use of HA8688 phone proved effective. Improve the circuit shown in Figure 1. This power reserve battery power, take 78L05 as the core composition. On-hook state IC for the liquid-crystal display circuit at the same time, the IC, D to the battery slowly charging,