一种便携型彩色液晶电视的设计与制作

Design and Implementation of Pocket Colorful LCD Television

在分析研究液晶电视的调谐器、中频放大电路、音视频解码电路、液晶行列驱动电路、液晶屏和电源等部分的基础上,对其核心部分液晶显示器升压电路、调谐电压电路设计方案进行优化,将视频解码电路进行合理布局和调试,提出了驱动电压转换以及NTSC制改为PAL制的改制方法。用TFT液晶屏作显示器,同时为了与液晶显示器重量轻、耗电少的优势相配合,在电源的选择上,抛弃传统的变压器降压方式,采用开关电源供电,降低了功耗,体积和重量大大地减小,研制出一台具有较高收视性能的彩色液晶电视。

Based on the circuit analysis, particularly on the main parts of the LCD TV set, the tuner, the intermediate frequency magnifying circuit, the video frequency decoding circuit, the LCD row and column driving circuit, LCD screen and power supply etc, a kind of designing method for pocket colorful LCD television is introduced. The design of the core parts is optimized, which include LCD screen volt-up circuit, the volt modulation circuit, the reasonable layout and modulating of the audio decoding circuit,the transforming of volt and NTSC to PAL. Meanwhile,this article introduces a kind of manufacturing art for LCD screen of TFT. To decrease the weight of LCD as well as to save the power, it throws off the traditional way of volt-down transformer,introducing switching power supplier. A high receiving quality TV set with decreased volume and weight is achieved.