LCD Display Advantages and Disadvantages

Viewing angle

LCDs have a narrower usable viewing angle than CRTs due to the features of the technology used. Luminance and contrast can vary significantly as viewing angle changes. LCD devices should be viewed from directly in front of the display. However, it should be noted that recent advances in  are significantly increasing the usable viewing angle for such displays.

LCD Plasma TV

Refresh rate

The technology used to construct flat-panel displays means that there is no “flicker” apparent to the viewer. However, the screen refresh rate is relatively slow compared to CRT displays and so motion artefact can be apparent with moving or fast-changing images.

Luminance

Flat-panel displays are capable of high luminance and can work well in brightly-lit areas. However, they are often not capable of black levels as low as CRT displays and so often suffer from reduced contrast.

Resolution

The resolution of an LCD display is fixed at the time of manufacture. At the native resolution of the panel the resolution is exact. Sho uld it be required to display images at different resolutions, the image data will need to be rescaled before display. This rescaling can introduce distortion in the displayed image.

Displays using CRT technology, however, can easily be switched between different resolutions without noticeable loss in display quality.

Size and shape

Flat-panel displays are, in general, lighter than CRT displays and have a smaller footprint. Their screens are flat, thus providing a more faithful reproduction of the original captured image.

Power consumption

Flat-panel displays consume less electricity and produce less heat than CRT displays.

Focus/sharpness

Where CRTs require careful focussing to produce the sharpest image, LCDs are perfectly sharp – although consideration must be given to any difference in resolution between image data and the display (see Resolution, above).

Geometric distortion

In general there is no geometric distortion with flat-panel LCD displays. If  images require to be rescaled for display it is possible that this may introduce minor distortion.

Bad pixels and screen uniformity

LCDs can have “stuck” pixels – pixels which are permanently on or off. Some pixels may be improperly connected to adjoining pixels, rows or columns. Also, the panel may not be uniformly illuminated by the backlight resulting in uneven intensity and shading over the screen. The screen glass itself may also contribute to non-uniformity in the displayed image.

Liquid Crystal Display

With the advent of digital imaging systems it has become increasingly common to view medical images on electronic soft-copy display devices rather than film. This has many advantages, not least the cost-saving involved in not printing film and managing its storage.

LCD Displays Screen

For many years the dominant technology in electronic displays has been the cathode-ray tube (CRT), as it has been in television viewing in the home. Recent years, however, have seen the development of a number of alternative technologies for such small displays, including plasma, liquid crystal and projected displays. This report evaluates a display that uses liquid crystal display technology.

Liquid crystals exist in a state that displays some of the characteristics of a solid (i.e. molecules in the crystal are fixed in orientation within the material) and some of the characteristics of a liquid (i.e. the molecules are free to move around while maintaining that fixed orientation). A substance can exist as a liquid crystal over a relatively narrow temperature range; any higher than this range and it becomes a normal liquid and any lower and it becomes a normal
solid. Liquid crystals can exist in several different “phases” displaying different characteristics, and it is a particular instance of one of these phases that is used in liquid crystal displays – the “nematic” phase.

In the nematic state, the liquid crystals are naturally aligned. They can be forced to change their alignment by application of an electrical voltage across the crystal. The degree by which they change alignment can be controlled predictably by the amount of voltage applied. As the alignment changes, the polarisation of any light passing through the crystal is affected in a similarly predictable fashion. It is this property that makes liquid crystals suitable for use in display devices.

Liquid crystals are used in displays by sandwiching them between two layers of glass. On either side of this sandwich are placed two polarising layers. These two layers of polarising material have planes of polarisation that are perpendicular to each other. A backlight is placed on one side of the sandwich and the light from this passes through the first layer of polarising material, causing it to be polarised. The plane of vibration of the light is modified by the liquid crystal according to the alignment of the crystal, which in turn is controlled by the voltage across it. This voltage is applied by electrodes on one side of the liquid crystal cell, hence this particular construction is referred to as ‘In-Plane Switching’.

Finally, the transmitted light reaches the front polarising layer, and the amount of light allowed through this layer is dependent on the plane of vibration of the light in relation to this second polarising layer. By adjusting the orientation of the molecules, the plane of  vibration of the light can be modified and thus the amount of light passing through can be controlled.

Because the Oggul on-screeen information can be constantly cycled, you can display much more information in your premises window using the same space. Changes to holiday offers can be instantly reflected at all outlets, or just some. So buyers get much more information from the pavement, and you increase footfall and business. Oggul will give you a real competitive advantage through your high street display. Why wait?

Window Display Ideas for Travel Agents

• • Dynamic and attractive window collateral
  • No more hand-written updates
  • Promote and update all your services
  • More information for the same space
  • Reduces production and distribution costs
  • Staff are less likely to make mistakes
  • Same or lower cost as alternatives
  • Daily or hourly updates

Introduction

Oggul LCD Display Screens

Digital display media, sometimes also known as digital signage, has become the fastest growing segment in the advertising marketplace as retailers, hoteliers, etc., latch onto the fact that it is one of the most effective ways of presenting marketing messages to the general public. The human eye is naturally drawn to colour and movement, but, more than that, digital display media is not only seen, but remembered and acted upon; studies have shown that consumers a much more likely to remember and become enthused about a marketing message if it is presented with colour, animation and special effects than if it is drab and static. Digital display media has the power to make you feel strongly about something by presenting it to you vividly, in large, colourful, close-up; a technique also used, with much success, by Derren Brown.

Digital Display Media Options, etc.

Effective marketing is all about conveying the right message to the right person at the right time and digital display media has more capability to do this than any other. Digital display media can, of course, be situated strategically in areas such as waiting areas in railway or bus stations, traffic bottlenecks, etc., where there is effectively a captive audience. An effective digital display media advertising campaign also takes into account the visibility of the media, the peak number of viewers and the length of time viewers remain in any given area.

As far as digital display media technology is concerned, displays can take the form of LCD or Plasma screens, projection screens, LED (“Light Emitting Diode”) displays, etc.., served by a content management server over a network infrastructure of some kind. LCD, or “Liquid Crystal Display”, screens or monitors are perhaps the most familiar components, since they are also used for many consumer applications. Prospective buyers should be aware, however, that commercial LCD screens typically cost more than consumer grade screens of equivalent size. The LCD versus Plasma debate rages on, just as it does in the field of consumer electronics, but LCD screens are typically amongst the brightest direct view displays, with good colour reproduction and perfect sharpness at native resolution. They are also becoming thinner, day by day, so are relatively lightweight, with flexible mounting options.

Digital display media can vary in size from, say, 12″ across, measured diagonally, for a small display situated on the checkout counter of a supermarket or department store, to an entire wall of a building – albeit not in the form of a single panel – for a sophisticated outdoor advertising display. Most digital display screens fall somewhere between these two extremes; the TX32LZD80 model from Panasonic, for example, features a 32″ LCD panel with a “Full HD” native resolution of 1,920 x 1,080 pixels, which can display 1080p content, as well as 1080i and 720p content, without upscaling The LCD panel itself is surrounded by a slim, glossy, piano black frame which curves gently backwards along its length, so the TX32LZD80 is pleasing on the eye even when there`s nothing on the screen.

Digital Display Solutions

Instantly update prices…quickly and easily upload content…improve the bottom line. The Oggul high-tech window display does all this for you and more.

And because the on-screeen information can be constantly cycled, you can display much more information using the same space. So buyers get much more information from the pavement, and you increase footfall and business.

Display Video, Photo and Graphics on a Digital-Display

Why Oggul Digital Display

Oggul will give you a real competitive advantage through your high street display. No more hand-written updates – you can promote and update your promotion as you like. Your staff are less likely to make mistakes as well. You will find that the Oggul is available at the same or lower cost as the alternatives. The Oggul eliminates the production and distribution costs associated with dynamic marketing material. It is a genuinely improved high street solution.

• Dynamic visual marketing to increase footfall
• More information for the same space
• Your branding or co-branding
• Reduces production and distribution costs
• Minute-by-minute control of window display
• Modern shop front impact
• Bespoke solutions and standard products
• Direct link to your main website content

The Oggul eliminates the production and distribution costs associated with dynamic marketing material.

Instantly update prices…quickly and easily upload content…improve the bottom line. The Oggul high-tech window display does all this for you and more.

Oggul Display Screen

And because the on-screeen information can be constantly cycled, you can display much more information using the same space. With instantaneous updates, changes to property status can be instantly reflected at all outlets. So buyers get much more information from the pavement, and sellers see their property more effectively marketed on the high street.

• Dynamic visual marketing to increase footfall
• Instantly reflect sell status – under offer, exchange, etc.
• More information for the same space
• Reduces production and distribution costs
• Minute-by-minute control of window display
• Modern shop front impact
• Direct link to your main website content
• Full range of services displayed – mortgages, HIPs, management, etc.
• Store branding of Oggul display
• Cross-branch property marketing

How it works

UK Estate Agent Network

Banks and Building Societies

Easily run your own video, photo and graphics on an Oggul

The dynamic Oggul display will make a real difference to banks, building societies and other retail finance outlets. Through its web-linked display, on-screen marketing messages can be constantly cycled, so you can display much more information using the same window space. Customer information can be delivered in any web-standard format, or even in Powerpoint, resulting in a dynamic display which will generate more interest than a passive leaflet or poster.

The Oggul can be used in-store or as a window-based display. It requires standard power, and network access through Wi-Fi or LAN. It will use the security of your existing content management centre links. Your banking compliance is vastly improved as configuration can be controlled centrally and updates can be instantaneous across your retail network.

Oggul LCD Display Screens

Getting information out fast, as product and market information changes, is a real competitive advantage. Oggul will help you attract more customers and improve your revenues and profitability.

• Increase product awareness
• Active displays to drive your marketing
• Cycling information that retains interest
• Reduced production and distribution costs
• Central real time updates for interest rates and product offers
• Improved FSA compliance
• Create modern dynamic impact.

How it works

The Oggul has been developed (patent pending) by Consumonics Ltd. Our mission is to bring the most effective visual merchandising to UK high street partners. We will be delighted to talk to you further about what we can offer.