Lecture 1b ENGR3030U Zeid Ch 11

Lecture 1b ENGR3030U Zeid Ch 11 - ENGR3030U Fall 2009...

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Unformatted text preview: ENGR3030U Fall 2009 George Platanitis, Ph.D, P.Eng. ENGR3030U Fall 2009 George Platanitis, Ph.D, P.Eng. Graphics Display – Ch. 11 Objectives: • Hardware components of CAD/CAM/CAE systems. • CRT, Raster, and Flat Panel displays. • Analog and digital flat panel displays. • Software components and general descriptions of CAD/CAM/ CAE software. ENGR3030U Fall 2009 George Platanitis, Ph.D, P.Eng. • Knowledge of basic hardware principals regarding graphics displays crucial to developing and implementing graphics algorithms to render and visualize CAD models. • Helpful in dealing with Web-based applications, including image generation and editing, and writing graphics applications. • Software such as Paint and Photoshop use these principals. • Java programming uses them, too. • Colour schemes and mixing colour signals on Web applications and XHTML based on same graphics principals. Introduction ENGR3030U Fall 2009 George Platanitis, Ph.D, P.Eng. Overview of CAD/CAM/CAE Components Figure 2.1 (Lee) Components of CAD/CAM/CAE systems. Hardware and software allowing interactive shape manipulation key to manufacturing process. ENGR3030U Fall 2009 George Platanitis, Ph.D, P.Eng. Hardware Components Figure 2.2 (Lee) Examples of input devices: (a) mouse, (b) data tablet with a puck and stylus, and (c) space ball. Facilitate shape manipulation and connected to output devices. ENGR3030U Fall 2009 George Platanitis, Ph.D, P.Eng. Hardware Components Figure 2.3 (Lee) Examples of output devices: (a) plotter, (b) colour laser printer. Display images transferred to paper or other media. ENGR3030U Fall 2009 George Platanitis, Ph.D, P.Eng. Hardware Components – Vector-Refresh (Stroke-Refresh) Graphics Devices Figure 2.4 (Lee) Components of a vector-refresh graphics device. ENGR3030U Fall 2009 George Platanitis, Ph.D, P.Eng. Hardware Components – CRT Figure 2.5 (Lee) Cross-section view of a cathode ray tube (CRT). Images must be redrawn every 1/30 s (refresh) for image to appear steady. Slower refresh causes image to appear to “flicker”. ENGR3030U Fall 2009 George Platanitis, Ph.D, P.Eng. • Technologies exist to prevent electron beams from interfering with each other. • Old technology is shadow mask, which ensures each bit of light hits a phosphor dot to produce illumination. • Dot pitch – distance between two dots (pixels) in mask. Hardware Components – CRT ENGR3030U Fall 2009 George Platanitis, Ph.D, P.Eng. Figure 2.10 (Lee) Distribution of phosphors for different colours. Hardware Components – CRT ENGR3030U Fall 2009 George Platanitis, Ph.D, P.Eng. Figure 2.11 (Lee) Shadow mask. Ensures electron beam only strikes phosphor it is associated with....
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This note was uploaded on 11/10/2009 for the course ENGR 3030 taught by Professor Vinhquan during the Spring '09 term at UOIT.

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Lecture 1b ENGR3030U Zeid Ch 11 - ENGR3030U Fall 2009...

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