Q: What are the advantages of TFT LCD compared with CRT?

A:In a CRT monitor, a gun shoots electrons and general light by colliding polarized electrons on fluorescent glass. Therefore, CRT monitors basically operate with an analogue RGB signal. A TFT LCD monitor is a device that displays an input image by operating a liquid crystal panel. The TFT has a fundamentally different structure than a CRT: Each cell has an active matrix structure and independent active elements. A TFT LCD has two glass panels and the space between them is filled in with liquid crystal. When each cell is connected with electrodes and impressed with voltage, the molecular structure of the liquid crystal is altered and controls the amount of inlet lighting to display images. A TFT LCD has several advantages over a CRT, since it can be very thin and no flickering occurs because it does not use the scanning method.

Q: Why is a vertical frequency of 60Hz optimal for an LCD monitor?

A:Unlike a CRT monitor, the TFT LCD panel has a fixed resolution. For example, an XGA monitor has 1024x3 (R, G, B) x 768 pixels and a higher resolution may not be available without additional software processing. The panel is designed to optimise the display for a 65MHz dot clock, one of the standards for XGA displays. Since the vertical/horizontal frequency for this dot clock is 60Hz/48kHz, the optimum frequency for this monitor is 60Hz.

Q: What kind of wide-angle technology is available? How does it work?

A:The TFT LCD panel is an element that controls/displays the inlet of a backlight using the dual refraction of a liquid crystal. Using the property that the projection of inlet light refracts toward the major axis of the liquid element, it controls the direction of inlet light and displays it. Since the refraction ratio of inlet light on liquid crystal varies with the inlet angle of the light, the viewing angle of a TFT is much narrower than that of a CRT. Usually, the viewing angle refers to the point where the contrast ratio is 10. Many ways to widen the viewing angle are currently being developed and the most common approach is to use a wide viewing angle film, which widens the viewing angle by varying the refraction ratio. IPS (In Plane Switching) or MVA (Multi Vertical Aligned) is also used to give a wider viewing angle.

Q: Why is there no flicker on an LCD Monitor?

A:Technically speaking, LCDs do flicker, but the cause of the phenomenon is different from that of CRT monitor — and it has no impact of the ease of viewing. Flickering in an LCD monitor relates to usually undetectable luminance caused by the difference between positive and negative voltage. On the other hand, CRT flickering that can irritate the human eye occurs when the on/off action of the fluorescent object becomes visible. Since the reaction speed of liquid crystal in an LCD panel is much slower, this troublesome form of flickering is not present in an LCD display.

Q: Why is an LCD monitor virtually free of Electro Magnetic Interference?

A:Unlike a CRT, an LCD monitor does not have key parts that generate Electro Magnetic Interference, especially magnetic fields. Also, since an LCD display utilizes relatively low power, its power supply is extremely quiet.

DV300/DV301B 30" Multimedia Information Display

11.Technical Specifications

LCD PANEL

 

 

 

 

• Type

 

TFT LCD

 

 

 

 

 

• Screen size

 

29.5 inch

 

 

• Pixel Pitch

 

0.5025 x 0.1675 mm x RGB

• LCD Panel type

 

1280 x 768 pixels

 

 

 

R.G.B. vertical stripe

 

 

Hard coating surface, anti-glare polarizer

• Effective viewing area

 

(H) 643.2 x (V) 385.92mm

• Display Colours

 

8 bits interface (16.7M colours)

PC SCANNING

 

 

 

 

• Vertical refresh rate

 

56Hz-61Hz

 

 

• Horizontal frequency

 

31kHz-63kHz

 

PC VIDEO

 

 

 

 

• Video dot rate

 

< 80 MHz

 

 

• Input impedance

 

 

 

 

- Video

 

75 ohm

 

 

- Sync

 

2.2K ohm

 

 

• Input signal levels

 

0.7 Vpp

 

 

• Sync input signal

 

Separate sync

 

• Sync polarities

 

Positive and negative

• Input Frequency

 

WXGA

Hsync

48 kHz, Vsync 60 Hz (N.I.)

 

 

SVGA

Hsync

38 kHz, Vsync 60 Hz (N.I.)

 

 

VGA

Hsync

31 kHz, Vsync 60 Hz (N.I.)

• Video interface

 

D-sub, S-Video, TV-RF, SCART (Europe) or composite and

 

 

components video (others)

AUDIO

 

 

 

 

• Input level for PC/SVHS/SCART

 

500 mV nominal

 

• Loudspeaker

 

5W Stereo Audio (2.5W/channel RMS x2, 200Hz~10kHz,

 

 

4 ohm, 10% THD)

 

 

 

 

 

 

57

58

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Mitsubishi Electronics DV301B, DV300 manual Technical Specifications, LCD Panel, PC Scanning, PC Video

DV300, DV301B specifications

Mitsubishi Electronics has long been recognized for its commitment to innovation, and the DV301B and DV300 are prime examples of their advancements in display technology. Both models are designed to meet the needs of modern consumers who demand high-quality visual experiences in both personal and professional environments.

The Mitsubishi DV301B is a premium model that stands out with its impressive full HD 1080p resolution, ensuring that users enjoy stunning clarity and sharp image quality. The DV300, while slightly more affordable, doesn’t compromise significantly on performance, featuring a similarly high resolution that allows for vibrant colors and detailed imagery. Both models leverage advanced LCD technology to deliver lifelike visuals, making them suitable for a wide range of applications, from home theaters to corporate presentations.

One of the key features of the DV301B is its enhanced color reproduction capabilities. It utilizes Mitsubishi's proprietary color enhancement technology, resulting in deeper blacks, brighter whites, and a broader color palette. This ensures that all displayed content is more immersive. The DV300 also incorporates solid color technology, although it may not match the DV301B's prowess in vividness and contrast.

Connectivity-wise, both models are highly versatile, offering multiple HDMI ports, USB connections, and even legacy inputs for older devices. This extensive compatibility ensures that users can seamlessly integrate the DV301B and DV300 with their existing setups without the need for complicated adapters or converters.

Another standout characteristic of both models is their energy efficiency. Mitsubishi Electronics has integrated intelligent power management features into these displays, which help reduce energy consumption without sacrificing performance. This approach not only benefits the environment but also results in lower operating costs for the user.

The designs of both the DV301B and DV300 are sleek and modern, with ultra-thin bezels that maximize the viewing area while maintaining an elegant aesthetic appeal. Additionally, they are equipped with user-friendly interfaces that allow consumers to easily navigate settings, adjust picture modes, and customize their viewing experiences.

In conclusion, the Mitsubishi DV301B and DV300 represent the culmination of extensive research and development in display technology. Their main features, including high-definition resolution, advanced color enhancement, versatile connectivity options, energy efficiency, and sleek designs, make them compelling choices for anyone in search of premium display solutions. Whether for gaming, movie watching, or professional presentations, these models deliver an exceptional visual experience that continues to set Mitsubishi Electronics apart in the marketplace.