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| 液晶显示器有什么特点 |
| 发布日期：2019-10-24 浏览次数：995 [返回上一页] |
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液晶显示器介绍
液晶显示器，为平面超薄的显示设备，它由一定数量的彩色或黑白像素组成，放置于光源或者反射面前方。液晶显示器功耗很低，因此倍受工程师青睐，适用于使用电池的电子设备。它的主要原理是以电流刺激液晶分子产生点、线、面配合背部灯管构成画面。
液晶显示器有什么特点?液晶显示器亮度和对比度多少合适?
液晶显示器特点
1.机身薄，节省空间
与比较笨重的CRT显示器相比，液晶显示器只要前者三分之一的空间。
2.省电，不产生高温
它属于低耗电产品，可以做到完全不发热（主要耗电和发热部分存在于背光灯管或LED），而CRT显示器，因显像技术不可避免产生高温。
3.低辐射，益健康
液晶显示器的辐射远低于CRT显示器（仅仅是低，并不是完全没有辐射，电子产品多多少少都有辐射），这对于整天在电脑前工作的人来说是一个福音。
4.画面柔和不伤眼
不同于CRT技术，液晶显示器画面不会闪烁，可以减少显示器对眼睛的伤害，眼睛不容易疲劳。
液晶显示器结构工作原理
液晶显示器有什么特点?液晶显示器亮度和对比度多少合适?
液晶显示器的组成及工作原理：从液晶显示器的结构来说，无论是笔记本屏还是桌面液晶显示器，采用的液晶显示器屏全是由不同部分组成的分层结构。液晶显示器由两块板构成，厚约1mm，其间由包含有液晶材料的5um均匀间隔隔开。因为液晶材料本身并不发光，所以在显示屏下边都设有作为光源的灯管，而在液晶显示器屏背面有一块背光板（或称匀光板）和反光膜，背光板是由荧光物质组成，可以发射光线，其作用主要是提供均匀的背光源。
背光板发出的光线在穿过第一层偏振过滤层之后进入包含成千上万液晶液滴的液晶层。
液晶层中的液滴都被包含在细小的单元格结构中，一个或多个单元格构成屏幕上的一个像素。在玻璃板与液晶材料之间是透明的电极，电极分为行和列，在行与列的交叉点上，通过改变电压而改变液晶的旋光状态，液晶材料的作用类似于一个个小光阀。
液晶显示器优点
1、显示质量高
由于液晶显示器每一个点在收到信号后就一直保持那种色彩和亮度，恒定发光，而不象阴极射线管显示器（CRT）那样需要不断刷新亮点。因此，液晶显示器画质高而且绝对不会闪烁，把眼睛疲劳降到了最低。
2、少量的电磁辐射
传统显示器的显示材料是荧光粉，通过电子束撞击荧光粉而显示，电子束在打到荧光粉上的一刹那间会产生强大的电磁辐射，尽管目前有许多显示器产品在处理辐射问题上进行了比较有效的处理，尽可能地把辐射量降到最低，但要彻底消除是困难的。相对来说，液晶显示器在防止辐射方面具有先天的优势，因为它根本就不存在辐射。在电磁波的防范方面，液晶显示器也有自己独特的优势，它采用了严格的密封技术将来自驱动电路的少量电磁波封闭在显示器中，而普通显示器为了散发热量的需要，必须尽可能地让内部的电路与空气接触，这样内部电路产生的电磁波也就大量地向外泄漏了。
3、可视面积大
对于相同尺寸的显示器来说，液晶显示器的可视面积要更大一些。液晶显示器的可视面积跟它的对角线尺寸相同。而阴极射线管显示器，显像管前面板四周有一英寸左右的边框，不能用于显示。
4、体积小，重量轻
传统的阴极射线管显示器，后面总是拖着一个笨重的射线管。液晶显示器突破了这一限制，给人一种全新的感觉。传统显示器是通过电子枪发射电子束到屏幕，因而显像管的管颈不能做得很短，当屏幕增加时也必然增大整个显示器的体积。而液晶显示器通过显示屏上的电极控制液晶分子状态来达到显示目的，即使屏幕加大，它的体积也不会成正比的增加，而且在重量上比相同显示面积的传统显示器要轻得多。
液晶显示器有什么特点?液晶显示器亮度和对比度多少合适?
5、画面效果好
与传统显示器相比，液晶显示器一开始就使用纯平面的玻璃板，其显示效果是平面直角的，让人有一种耳目一新的感觉。而且液晶显示器更容易在小面积屏幕上实现高分辨率，例如，17英寸的液晶显示器就能很好地实现12801024分辨率，而通常18英寸CRT彩显上使用12801024以上分辨率的画面效果是不能完全令人满意的。
6、应用范围广
最初的液晶显示器由于无法显示细腻的字符，通常应用在电子表、计算器上。随着液晶显示技术的不断发展和进步，字符显示开始细腻起来，同时也支持基本的彩色显示，并逐步用于液晶电视、摄像机的液晶显示器、掌上游戏机上。而随后出现的DSTN和TFT则被广泛制作成电脑中的液晶显示设备，DSTN液晶显示屏用于早期的笔记本电脑;TFT则既应用在笔记本电脑上，又用于主流台式显示器上。
Introduction to liquid crystal display
Liquid crystal display (LCD) is a flat, ultrathin display device consisting of a number of color or black and white pixels placed in front of a light source or reflection. Liquid-crystal displays (LCDS), which consume little power, are popular with engineers and are suitable for battery-powered electronics. Its main principle is the electric current stimulation liquid crystal molecule produces the point, the line, the surface cooperates the back lamp tube to constitute the picture.
What are the characteristics of LCD? LCD brightness and contrast how much appropriate?
Characteristics of liquid crystal display
1. Thin body, saving space
Compared with the more bulky CRT monitors, LCDS have only a third of the space.
2. Save electricity and don't generate high temperature
It is a low power consumption product, which can achieve no heat (the main power consumption and heat are in the backlight tube or LED), while CRT display, due to the imaging technology will inevitably generate high temperature.
3. Low radiation, good health
LCDS emit far less radiation than CRT monitors (just low, not zero, as electronics emit more or less), a boon for those who spend their days in front of a computer.
4. The picture is soft but not harmful to the eyes
Unlike CRT technology, LCD screen does not flicker, can reduce the damage of the monitor to the eye, the eye is not easy to fatigue.
Liquid crystal display structure working principle
What are the characteristics of LCD? LCD brightness and contrast how much appropriate?
Liquid crystal display composition and working principle: from the structure of liquid crystal display, whether it is notebook screen or desktop liquid crystal display, the use of liquid crystal display screen is composed of different parts of the hierarchical structure. The LCD consists of two panels, about 1mm thick, evenly spaced by 5um containing liquid crystal material. Because liquid crystal material itself does not emit light, so below the display screen is equipped with a lamp tube as a light source, and in the back of the LCD display screen has a backlight plate (or say uniform plate) and reflective film, backlight plate is composed of fluorescent substances, can emit light, its role is mainly to provide uniform backlight.
The light from the backlight plate passes through the first polarization filter and into the liquid crystal layer containing thousands of liquid crystals.
The droplets in the liquid crystal layer are contained in tiny cell structures, one or more of which make up a pixel on the screen. The transparent electrode between the glass plate and the liquid crystal material is divided into rows and columns. At the intersection of rows and columns, the optical rotation state of the liquid crystal is changed by changing the voltage. The liquid crystal material ACTS like a small light valve.
Advantages of liquid crystal display
1. High display quality
Since every point of a liquid crystal display (LCD) receives a signal and maintains that color and brightness, it always emits light, unlike cathode ray tube displays (CRT), which need to constantly refresh bright spots. As a result, LCD displays have high picture quality and never flicker, minimizing eye strain.
A small amount of electromagnetic radiation
Traditional display the display of the material is phosphor, impact on phosphor by electron beam, according to the electron beam in hit for a moment on the fluorescent powder can produce strong electromagnetic radiation, although there are many display products is more effective in the treatment of the radiation on the processing, as much as possible to minimize radiation, but it is difficult to eliminate. In contrast, LCDS have an inherent advantage in preventing radiation, since there is no radiation at all. In prevention of electromagnetic wave, liquid-crystal displays (LCDS) have their own unique advantages, it has adopted strict sealing technology will come from the closed a small amount of electromagnetic waves in the display driver circuit, and the need of ordinary display in order to send out quantity of heat, must let the internal circuit is exposed to air as much as possible, so that the internal circuit of the electromagnetic wave is heavily leak outward.
3. Large visible area
For a monitor of the same size, the visible area of a liquid crystal display is larger. The visible area of an LCD is the same as its diagonal size. CRT displays, which have an inch or so of border around the front panel of the tube, cannot be used for display.
4. Small size and light weight
Traditional CRT displays are always followed by a bulky CRT. Liquid crystal display breaks through this limitation, give a person a kind of brand-new feeling. Traditional display is through the electron gun to send electron beam to the screen, so the tube neck can not be made very short, when the screen is increased, it will inevitably increase the size of the whole display. The liquid crystal display displays the molecular state of the liquid crystal through the electrode on the display screen. Even if the screen is larger, its volume will not increase proportionately, and it is much lighter than the traditional display with the same display area.
What are the characteristics of LCD? LCD brightness and contrast how much appropriate?
5. Good picture effect
Compared with traditional monitors, LCD monitors start with flat glass panels, and the display effect is flat at right angles, giving a refreshing feeling. Moreover, LCDS are easier to achieve high resolution on small screens. For example, a 17-inch LCD can achieve a good 12801024 resolution, while an 18-inch CRT color display with a resolution above 12801024 cannot be completely satisfactory.
6. Wide application range
The original liquid crystal display due to the inability to display fine characters, usually used in electronic watches, calculators. With the continuous development and progress of LCD technology, character display began to be exquisite, but also support the basic color display, and gradually used in LCD TV, camera LCD, handheld game console. Later, DSTN and TFT were widely used as LCD devices in computers. DSTN LCD screens were used in early notebook computers. TFT is used on both laptops and mainstream desktop displays.
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