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发明公开
CN102630367A 电源电路和具有该电源电路的液晶显示装置 无效 - 撤回

电源电路和具有该电源电路的液晶显示装置
摘要：
本发明的目的在于以低成本提供能够生成电压值的绝对值相等的正和负的模拟电源电压的电源电路。电源电路(210)包括DCDC转换电路(212)和电荷泵电路(214)。在电荷泵电路(214)设置有当控制用开关(S1)为断开状态时使电流流动的二极管(D3)和当控制用开关(S1)为导通状态时使电流流动的二极管(D4)。在DCDC转换电路(212)设置有当控制用开关(S1)为断开状态时使流动电流的两个二极管(D1、D2)。在此，该整流部构成为：由二极管(D1、D2)构成的整流部的正向降低电压等于二极管(D3)的正向降低电压与二极管(D4)的正向降低电压之和。
摘要（英）：

The present invention aims to provide a low-cost power-supply circuit that can generate positive and negative analog power-supply voltages having equal absolute values. Said power-supply circuit (210) comprises a DC/DC converter circuit (212) and a charge pump circuit (214). The charge pump circuit (214) is provided with a diode (D3) that lets current flow when a control switch (S1) is off and a diode (D4) that lets current flow when the control switch (S1) is on. The DC/DC converter circuit (212) is provided with two diodes (D1, D2) that let current flow when the control switch (S1) is off. This forms a rectification unit comprising said two diodes (D1, D2) such that the forward voltage drop across said rectification unit is equal to the sum of the forward voltage drops across the other two diodes (D3, D4).

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