论文部分内容阅读
近几年来,家庭影院的概念逐渐深入人心。随着DVD为代表的高素质节目源成为家庭影院系统的主流,加上住房条件的改善,AV爱好者们已不满足于采用86CM以下的彩电来做图像显示的终端,眼光盯上了可以显示更大尺寸的投影电视,以获得更加惊心动魄的视觉冲击和身临其境的现场感,直投式投影电视很早就应用于商业场合而为大家所熟悉,虽然可以投射出100英寸以上的超大画面,但优质的三枪投影机非常昂贵而且安装调试复杂,后起之秀LCD液晶投影虽然价格较有吸引力,但显示视频图像的质量尚未完全与三枪接轨,再加上直投式电视有一个致命缺陷,就是在有光亮的环境下,图像质量大打折扣,屏幕容易变成灰蒙蒙的一片,除非是昂贵的高亮度机器,所以,直投式投影机一直没有走进普通家庭。而背投式投影机的屏幕大小介于直投式投影机和大屏幕彩色电视机之间,一般在97CM-178CM的范围内,由于背投式投影机可以在光亮条件下使用,且不需要专门安装,加上价格介于14000-50000之间,更容易被一般家庭接受传统的背投电视的内部结构一般采用三管式,三个分别负责发射红、绿、蓝三基色电子束的投影显象管安装在机箱内的底部,经过机内一块呈一定角度安装的反射镜投射到半透明的透视屏幕上形成图像。由于投影部分和屏幕的结构是一体化在机箱内完成的,因此背投式电视机的光路几乎没有损失,而且受环境光线的影响也较小,用户也无须对投影系统进行光路调整,使用起来远比直投式投影机方便,早期的背投影电视机由于内部会聚系统的限制使得整机体积过大,加上采用的半透明透视屏幕技术水平不高,画面的亮度、对比度和分辨率都远低于普通的CRT彩色电视机。近两年来,随着电视新技术的应用和生产工艺的不断提高,背投式电视无论是在画面的亮度,对比度、分辨率还是三色会聚等方面得到长足的进步,甚至还开始出现液晶背投等新型结构,使得背投影电视开始成为一些家庭用户构建家庭影院时青睐的对象。在新春之际,本刊编辑部专门到电视机市场走马一回,对目前市面上的背投影电视新品进行了一次考察在此集中地进行介绍,以供本刊读者选购背投影电视时作参考。
In recent years, the concept of home theater gradually enjoys popular support. With the DVD as the representative of the high-quality program source to become the mainstream of home theater systems, coupled with the improvement of housing conditions, AV enthusiasts are not satisfied with the TV below 86CM to do the image display terminal, eyeing can be displayed Larger size projection TV for more thrilling visual impact and immersive live, direct projection projection TV has long been used in commercial occasions for everyone to be familiar with, although it can project a 100-inch or more large Screen, but high-quality three-shot projector is very expensive and complicated installation and commissioning, the rising star of LCD projection LCD Although the price is more attractive, but shows the quality of video images have not yet fully integrated with the three shots, plus direct-cast TV has a fatal Defects, that is, in a bright environment, the image quality greatly reduced, the screen easily become gray, unless it is expensive high-brightness machine, so the direct-throw projector has not been into the average family. The rear projection screen size between the projector and large-screen direct-projection color TV sets, usually in the range of 97CM-178CM, the rear projector can be used in bright conditions, and do not need Dedicated installation, coupled with the price between 14000-50000, easier to be accepted by the average family Traditional rear projection TV’s internal structure is generally three-tube, three were responsible for the launch of the red, green and blue three color electron beam projection The tube is mounted on the bottom of the cabinet and projects through an angled mirror in the machine onto a see-through translucent screen to create an image. Since the structure of the projection part and the screen are integrated in the chassis, there is almost no loss of light path of the rear-projection television set and less influence of ambient light, and the user does not need to adjust the optical path of the projection system and use it Far more than the straight-throw projector, the early rear projection TV due to the limitations of the internal convergence system makes the machine too large, with the use of translucent perspective screen technology is not high, the screen brightness, contrast and resolution are Much lower than ordinary CRT color TV. In the past two years, with the application of new television technologies and continuous improvement of production technology, rear-projection TVs have made great strides in terms of brightness, contrast, resolution or tri-color convergence, and even LCD backs Investment and other new structures, making the rear projection TV began to become some home users to build home theater favored object. On the occasion of the Spring Festival, editorial department of this magazine went to the television market for a long time and went back to conduct a survey on the current market of rear projection TV new products in this concentrated introduction for our readers to buy rear projection television reference.