POWER FREQUENCY CORRECTION DEVICE AND METHOD FOR PRVENTING SCREEN TREMBLING,申请号KR20070001726-传众专利搜索

POWER FREQUENCY CORRECTION DEVICE AND METHOD FOR PRVENTING SCREEN TREMBLING

申请公布号：KR20080064631(A)

申请号：KR20070001726

申请日期：2007.01.05

申请公布日期：2008.07.09

申请人：

DAEWOO ELECTRONICS CORPORATION

发明人：KANG, SUNG HUN

分类号：H04N5/14;H04N5/208

主分类号：H04N5/14

摘要：A power frequency correcting apparatus for preventing trembling of a screen and a method therefor are provided to prevent a screen from being trembled by increasing a power frequency and changing the switching of the transistor by a TR controller not identical power frequency with horizontal frequency. A power frequency correcting apparatus for preventing trembling of a screen includes an SMPS transformer(1), a transistor(2), a frequency detecting and comparator(10), and a transistor switching controller(40). The SMPS transformer supplies power to the transistor through an AC input. The transistor is connected with the SMPS transformer, and generates a power frequency. The frequency detecting and comparator detects and compares the power frequency generated by the transistor and a comparison frequency stored in a ROM with each other. The transistor switching controller controls a switching speed of the transistor according to the comparison result of the frequency detecting and comparator.