FAQs (Frequently Asked Questions)

問: 與 CDT 相比,TFT LCD 的優勢何在?

答: CDT 顯示器中,一個電子槍以撞擊熒光玻璃上的偏光電子方式發射電子和一 般光。因此,CDT 顯示器基本上以模擬紅綠藍信號操作。TFT LCD 顯示器則是 運用液晶屏面顯示輸入圖像的裝置。TFT 與 CDT 有根本不同的結構﹕其每一晶 胞皆有動態矩陣結構和獨立的活性元素。TFT LCD 有兩個玻璃屏面,其空間裝滿 液晶。當每一晶胞接上電極並通上電壓時,液晶分子結構則受到改變,從而控制 從里面射向顯示圖像的光。TFT LCD 比 CDT 有多重優勢,因為它能變得特別 薄,又沒有閃光,原因是它不使用掃描法。

問: LCD 顯示器的垂直頻率為何最大祗有 60 赫茲?

答: 與 CDT 顯示器不同,TFT LCD 屏幕具有固定的分辨率。例如,XGA 顯示器祗 有 1024x3(紅綠藍)x768 個像素,而更高分辨率若無更多的軟體處理則不可得。 本屏幕則定為 65 赫茲點脈沖最大顯示,即 XGA 顯示器的標準頻率之一。既然此 點脈沖是 60Hz/48kHz,此顯示器的最大頻率則為 60 赫茲。

問: 現有何種廣角技術?其功能如何?

答: TFT LCD 屏幕是透過液晶雙重折射放進內部光亮的元素控制器/顯示器。它利 用內部光折射至液體元素主軸的這一特性,控制內部光的方向、將光顯示出來。 由於液晶上內部光的折射比率隨光的內部角度變化,TFT 的視角比 CDT 的視角 更窄。通常,視角指對比度為 10 的角度點。目前有許多擴大視角的開發途徑。 最常用的方法為利用廣視角片,透過變換折射比率來擴大視角。IPS(面內開 關)或 MVA(多項垂直校準)也被用來擴大視角。飛利浦 181AS 型使用的則是 先進的IPS技術。

問: LCD 顯示器如何沒有閃光?

答: 從技術上說,LCD 也閃動,不過這個現象的原因與 CRT 顯示器的不同—其並 不妨礙視覺舒適感。LCD 的閃光指正負極電壓差造成的一般不易覺察的發光。另 一方面,傷害眼睛的 CRT 閃光是由於熒光物體的閃/滅動作變得顯而易見而造成 的。既然 LCD 屏幕的液晶反應速度較慢,這種討厭的閃光現象不存在於 LCD 顯 示器。

問: 為什麼 LCD 顯示器實際上的電磁波干擾很低?

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Philips 200CW8 user manual 現有何種廣角技術?其功能如何?

200CW8 specifications

The Philips 200CW8 and HWC8200T are innovative display solutions that reflect the company’s commitment to delivering high-quality visual experiences. The 200CW8 is a cutting-edge monitor designed for professionals who demand precise color reproduction and clarity. It features a 20-inch LCD screen with a resolution of 1600 x 900 pixels, providing sharp images and vibrant colors. The monitor is equipped with a wide viewing angle, allowing users to enjoy consistent colors and brightness from various positions.

One of the standout features of the Philips 200CW8 is its advanced IPS technology, which ensures accurate color representation and superb viewing angles. With a 1000:1 static contrast ratio and a response time of 5 ms, this monitor is ideal for graphic design, photography, and video editing. The Philips 200CW8 also boasts an energy-efficient design, adhering to Energy Star standards, which helps reduce overall energy consumption while maintaining high performance.

On the other hand, the HWC8200T is a versatile all-in-one solution that combines high-quality display capabilities with robust functionalities. This model is tailored for dynamic environments such as classrooms, conference rooms, and retail spaces. With a 22-inch touchscreen display, the HWC8200T allows for intuitive interactions, making it easier for users to engage with content.

Utilizing capacitive touch technology, the HWC8200T delivers an ultra-responsive experience with 10-point multi-touch capabilities. This makes it suitable for collaborative work, presentations, and interactive kiosks. The HWC8200T supports Full HD resolution of 1920 x 1080 pixels, ensuring that images and videos appear sharp and lifelike. Additionally, its sleek design and slim profile make it a stylish addition to any environment.

Both models come equipped with various connectivity options, including HDMI, DVI, and VGA ports, providing flexibility for use with multiple devices. The built-in speakers enhance audio output, making them suitable for multimedia presentations or casual entertainment. The Philips 200CW8 and HWC8200T are designed to meet the demands of modern users, offering exceptional performance, reliability, and user-friendly features, ensuring they satisfy professional and educational needs alike.