公开(公告)号：US6008861A

公开(公告)日：1999-12-28

申请号：US66536

申请日：1998-04-27

Applicant: Hyun-Jin Chon

Inventor： Hyun-Jin Chon

IPC: H04N5/445

CPC classification number: H04N5/44504

Abstract: An on-screen display (OSD) vertical blanking signal selection circuit for a display apparatus comprises: a microcomputer for generating a reference oscillating signal in response to vertical and horizontal synchronous signals from a video card; an HV processor for generating a flyback transformer (FBT) drive signal and horizontal and vertical drive signals in response to the reference oscillating signal from the microcomputer and the horizontal and vertical synchronous signals from the video card; an FBT for generating a high voltage in response to the FBT drive signal from the HV processor and for supplying the generated high voltage to a cathode ray tube; a horizontal deflection circuit for controlling horizontal deflection of electron beams in a cathode ray tube in response to the horizontal drive signal from the HV processor; a vertical deflection circuit for controlling a vertical deflection of the electron beams in the cathode ray tube in response to the vertical drive signal from the HV processor; and an OSD vertical blanking signal selector for supplying the vertical synchronous signal from the video card or a vertical blanking signal from the vertical deflection circuit as an OSD vertical blanking signal to an OSD circuit in response to a control signal from the microcomputer.

Abstract translation: 用于显示装置的屏幕显示（OSD）垂直消隐信号选择电路包括：微计算机，用于响应于来自视频卡的垂直和水平同步信号产生参考振荡信号; 用于响应于来自微型计算机的参考振荡信号和来自视频卡的水平和垂直同步信号产生回扫变压器（FBT）驱动信号和水平和垂直驱动信号的HV处理器; 用于响应于来自HV处理器的FBT驱动信号产生高电压并将所产生的高电压提供给阴极射线管的FBT; 水平偏转电路，用于响应于来自HV处理器的水平驱动信号，控制阴极射线管中电子束的水平偏转; 垂直偏转电路，用于响应于来自HV处理器的垂直驱动信号，控制阴极射线管中的电子束的垂直偏转; 以及OSD垂直消隐信号选择器，用于响应于来自微型计算机的控制信号，将来自视频卡的垂直同步信号或垂直偏转电路的垂直消隐信号作为OSD垂直消隐信号提供给OSD电路。