CRT display

This checklist presents criteria for comparing different ways of presenting information on CRT displays. 

Blackman, H. S., Gertman, D. 1., Gilmore, W. E. (1983). "CRT Display Evaluation The Checklist Evaluation of CRT-Generation Displays." Report no. NUREG/CR-3357. Washington, DC Nuclear Regulatory Commission. 

Most monitors are display terminals that use cathode-ray tube (CRT) displays, which function by exciting a layer of phosphors with an electron gun. These devices include monitors used with PCs and terminals used with mainframes or minicomputers. Features such as color, resolution, and size influence power requirements. Most PC monitors are... 

Figure 7. (a) Multichannel analyzer CRT display of raw data using... 

The electron gun used in a CRT is located centered behind the screen. The beam is precisely deflected to reach specific spots on the screen. Why are large-screen CRT displays longer (deeper) than small-screen CRT displays ... 

West, P. and J. Mellerio (2005). An innovative instrument for the psychophysical measurement of macular pigment optical density using a CRT display. International Color Vision Society Annual Meeting, Lyons, France. 

The entire CRT industry is based on the quality and reproducibility of the phosphors used. As stated earlier the phosphors used for the different kinds of CRT displays are constantly being researched and improved. For high-definition television screens the phosphors must be prepared with great control over powder morphology and particle size (see Section 9.15.4.2.1). 

Alarms should be displayed on a conventional dedicated window annuciator panel or if control room based on a dedicated CRT display for fire and gas detection systems. Each detector location should be highlighted with indications for trouble, alarm low, and alarm high. Where annuciator panel window alarms the alarm indication lights should be provided with specific labels indicating the exact alarm locations. 

An even greater pitfall into which many young process control engineers fall, particularly in recent years, is to get so involved in the fancy computer control hardware that is now available that they lose sight of the process control objectives. All the beautifiil CRT displays and the blue smoke and mirrors that computer control salespersons are notorious for using to sell hardware and software can easily seduce the unsuspecting control engineer. Keep in mind your main objective to come up with an effective control system. How you implement it, in a sophisticated computer or in simple pneumatic instruments, is of much less importance. 

Computer control console (CRT display). Courtesy of Honeywell.)... 

Table S.4 shows the preconcentration programme that was used in this investigation. Sample volumes of 10, 20 and SO ml were used successfully and the enriched metals were in all three instances eluted with S ml of HNO3 (2 M). The control unit is equipped with a CRT display to simplify the input of the desired preconcentration parameters. During the preconcentration, the current settings of valves and pumps are displayed.

Figure shows the choke control loop in detail. The position choke controller, ZIC, is located in the GC control room at Skid 7 and can be operated in the remote mode, i.e. under the control of the HOC computer, or in the local mode in which case the GC operator enters a setpoint value and the controller drives the choke to the proper position. Estimates based on both the pressure and choke relationship are available to the MOC operator on CRT displays. 

The CRT displays are usually vector devices, usually of high resolution (1024 x 1024) to provide clean lines. Raster equipment with its lower resolution and "jaggies" does not provide any advantage until we add the complexity of the solid fill for surfaces, or a range of colors. Hardcopy - frequently pen plotters -is a normal requirement. 

CRT displays can be broken down into two categories vector and raster technologies. A vector is a line drawn from some current position to a new one. This type of display is also referred to as a "random scan" device since the pattern of painting the screen depends on the figure drawn. With raster systems, the vector is interpreted as the dots (their position) needed to draw it. In addition, raster devices paint the screen in a ordered fashion, regardless of the resulting image. 

Viewing the graphics output of a device - either a CRT display or a hardcopy unit - is only one side of the users interaction with the graphics system. In some cases it is all that is needed, but the are many instances in which direct interaction is desirable or mandatory. In this section we will take a look at some of the devices used. 

The Relationship between Digital and Colorimetric Data for Computer-Controlled CRT Displays, CIE Publication 122, CIE Central Bureau, Vienna, Austria, 1996. 

Figure 5. Densitometric scans of the hemoglobin A, F, S and C standard from Figure 5A (solid line) and 5B (dashed line) superimposed along with an infant blood sample showing only hemoglobins A and F (filled with slanted lines). The computer generated scan was traced over and filled by hand to improve the visualization of the three scans, which were presented in different colors on the CRT display.

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