Words and expressions
CRT (Cathode ray tube)
LCD (Liquid Crystal Display
Plasma display
阴极射线管 液晶显示器 等离子显示器
13.1 CRT
(1) CRT are the most common way of display images; (2) The cathode is a heated filament; (3) The filament is in a vacuum tube; (4) The ray of electrons pour off a heated cathode into a
显示屏 闪动
黑白显示屏 条纹 发射 照明
成比例的 去除
可得到的
13.2 Liquid crystal display（LCD）
(1) Build an LCD is far more than create a sheet of liquid crystals;
13.2 Four facts of LCD
struck in a black-and-white screen;
Байду номын сангаас
13.1 color TV
(1)There are three phosphors arranged as dots and stripes that emitted green and blue screen;
(2) Three colors: red, green, blue;
plasma Image Heated Filament Attract Focusing Beam Electron Phosphor
stripe Proportion
Liquid Crystal Polarize Transmit Particular Original frame
Remind the Words and expressions
Specific English for Electronic Information Engineering
Teacher：张培珍
Guangdong Ocean University
Lesson 13: Television
Index Pre-reading 13.1 CRT 13.2 liquid crystal display 13.2 Plasma display 13.3 Digital television
Pre-reading
Read the lesson, paying attention to the following questions.
1
• what is CRT
3 2
•What is digital •What is
Remind the Words and expressions
vacuum;
13.1 CRT
A common CRT used in computer monitors and television sets
Electron gun
Words and expressions
Filament Vacuum tube
Pour off cathode
灯丝 真空管
(3) The tight high-speed beam flies through the vacuum and hits the screen;
13.1 black-and-white TV
(1) Some phosphor coats the inside screen; (2)There is one phosphor that glows white when
conduct electricity;
13.1 color TV
• 彩色阴极射线管 的剖面图: 1. 电 子枪2. 电子束 3. 聚焦线圈 4. 偏 向线圈 5. 阳极接 点 6. 电子束遮罩 区隔颜色区域 7. 萤光幕分别有 红绿蓝萤光剂分 区涂布 8. 彩色萤 光幕内侧的放大 图
Words and expressions
Cathode Negative
(1)Light can be polarized; (2)Liquid crystal can transmit and
change polarized light; (3)Liquid crystal can be changed by
electricity current; (4)Transparent substance can
流出 阴极
13.1 Functions of CRT
(1) Electrons are negative, the anode is positive, electrons pouring off the cathode;
(2) The stream of electrons is focused and accelerating anode;
Presentation Quality
Definition Encompass
Advance Quiz
Interactive Enhanced
Mix Cathode ray tube
Making use of Pour off
Introduction
(1) Some television rely on cathode ray tube(CRT) (2) Some use LCD(Liquid Crystal Display ); (3) The others rely on plasma display;
Anode Positive Stream Focusing Accelerate Tight high-speed beam phosphor
阴极 负极 阳极 正极 流动 聚焦 加速 密集高速光束
磷
Words and expressions
Screen Glow Black-and-white screen Stripe Emit Illuminate Proportion Leave out available