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Glossary

The following seeks to provide an explanation of the various panel specifications. However a word of caution, there are no standards for these specifications so for example the contrast ratio for one brand may not be comparable to another brand as the method of measurement may be different.

Model: The manufactures model reference.

Manufacturer: This is the marketing brand of the particular panel. Various companies make more or less of the panels they are marketing, for example some re-engineer other brands to add additional value such as increased brightness.

Diagonal: This is the diagonal size of the active viewing area, it is usually stated in inches even though the other dimensions are normally given in centimeters.

Display Area: The active viewing area.

Resolution: The number of pixels making up the display area. A pixel is made up of RGB (Red, Green, Blue) elements. Note: Sharp have announced a panel with RGBY (Yellow element added).

Brightness: Generally this refers to the amount of light when the panel is on and set to white. The measurement definition can vary very significantly.

Contrast Ratio: Strictly speaking it is the ratio of maximum bright to maximum dark however the definitions vary from company to company, sometimes very significantly.

Refresh Rate: The number of frames per second. Until 2009 most LCD panels operated over a range with 60Hz as the typical operating value however during 2009 a number of panels operating up to 120Hz appeared on the market.

Response Time: This is the time for a pixel to change its on/off state. There are various different definitions used for this.

Viewing Angle: Supposedly this should be the angle over which the image can be viewed however companies use different measurement definitions and users may find that in practical terms the results may be quite different.

Color Depth: This is the number of data bits the panel accepts that result in the panels ability to show colors. Marketers often use the theoretical implications of this to quote numbers such as 16.7 million colors or 1 billion colors however in reality this refers to a potential palette, certainly not what can be shown on the panel at any one time with current resolutions.

Interface Type: TTL and LVDS are the two common panel interface types.

Panel Voltage: This is the panel driving voltage.

Inverter Voltage: This is the voltage required for the backlight.

Backlight Type: CCFT / CFL are the predominant backlight types with LED backlighting gaining market share.

Outline Dimensions: This is the outer dimensions of the panel module, usually this is including mountings but it is important to verify this from the original specifications.

Application: If stated this is as given in the manufacturers specifications. It may be suitable as an indication of the target application or it may be a way for the manufacturer to avoid liability if the panel is used in other applications.

Specifications Date: As stated on the specifications sheet used for this entry.