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Multimedia applications for colour monitor
Products Colour sensor uses diffused reflection
Siemens' colour sensor operates on the 'diffused reflection' principle
A colour sensor that operates under the principle of 'diffused reflection' has been introduced by Siemens for use in both research and. manufacturing. Four transmitting LEDs of different colour (red, yellow, green and blue) are used as light sources; a photodiode measures the intensity of the reflected light and a downstream microcontroller encodes and stores information for subsequent reference. According to Siemens, the unique feature in the sensor is the exclusive use of electronic components, thereby reducing its volume to the size of a cigarette packet. Costs of manufacturing the sensor are minimized through the elimination of expensive opto-mechanical components such as lenses and colour filters. This advance has been made possible by the introduction of five plastic optical fibres each having an outer diameter of 2.2 mm; these serve as sensor head and link to the evaluation electronics. The physical separation of sensor and information processor has allowed the probe to be kept at a size suitable for reaching measuring points that were previously virtually inaccessible. Typical applications a r e assembly line inspection (for both on-line and off-line measurements), incoming goods inspection sorting and robotic functions. (Sie-
mens plc, Siemens House, Windmill Rd, Sunbury-on- Thames TW16 7HS, UK) [] 170
Multimedia applications for colour monitor The autoscanning model EUM2951A colour monitor from Mitsubishi incorporates a 29 inch display that accepts inputs from a range of sources: PAL and NTSC composite video, RGB analogue and q'TL, Svideo terminal (separate Y/C), monochrome TTL and stereo audio signals. The monitor comes supplied with a pair of detachable highfidelity speakers and features a wired remote control that enables users to switch freely from one source to another. Mitsubishi's autoscanning system enables the EUM-2951-A to switch automatically to any vertical frequency between 40 and 90 MHz, and any horizontal frequency between 15.5 and 36 kHz. Broadband video circuitry, a comb filter,
and other state-of-the-art video technologies are also incorporated. The 22 x 16 inch screen is housed in a 26 x 23 x 19 inch cabinet, with a full set of front panel controls enabling users to manually adjust video attributes such as tint, colour, sharpness, contrast and brightness; RGB H-phase, H-width, Vposition, V-height, contrast and brightness; and audio volume. Other EUM-2951A front panel controls include source-select for RGB, analogue or video signals and power on/off. The EUM-2951A monitor is fully compatible with all popular PC, PS/2 and Apple Macintosh II display standards. (Mitsubishi Electric UK
Ltd, Travellers Lane, Herts ALIO 8XB, UK)
Hatfield, []
Widescanning for the Big Screen The HJ-6505 coiour monitor brought out by Mitsubishi provides an ultra-high resolution 26 inch display with RGB analogue input and a bandwidth of 110 MHz. It autoscans between frequencies of 45-70 Hz horizontal and 50-80 Hz vertical and is aimed primarily at CAD/CAM and industrial process control environments. However, according to Mitsubishi, it is also suited to applications such as newspaper and magazine publishing, airtraffic control and electricity generating stations, where large amounts of data need to be seen at a glance. Advanced video and deflection circuits are employed by the HJ6505 to ensure stable, clear and bright images without distortion. An in-line, self-convergence design results in high reliability and low power consumption. The HJ-6505's CRT produces a dot trio pitch of 0.31 mm with misconvergence at the centre of 0.3 mm, and elsewhere of 0.6 mm maximum. Display resolution is typically 1280 x
1024 noninterlaced with dynamic beam forming. Dynamic beam forming (DBF) technology ensures the HJ-6505 delivers precise, halo-free picture quality over the entire screen. The technology sharpens the focus at the edges and corners of the screen in order to match the centre as closely as possible. This results in uniform lines over the entire screen area, and offers overall resolution improvements of around 30% over conventional CRTs. Super high contrast (SHC) glass developed by Mitsubishi is used by the HJ-6505 to absorb ambient light both on entry and on reflection from the phosphor screen, resulting in improved contrast and visibility. Other features of the HJ-6505 include an optional tilt-and-swivel base and automatic degauss at power-up. (Mitsubishi Electric UK
Ltd, Travellers Lane, Hatfield, Herts ALIO 8XB, UK. Tel: (0707) 276100) []
DISPLAYS,JULY 1990
Siemens' colour sensor operates on the 'diffused reflection' principle
A colour sensor that operates under the principle of 'diffused reflection' has been introduced by Siemens for use in both research and. manufacturing. Four transmitting LEDs of different colour (red, yellow, green and blue) are used as light sources; a photodiode measures the intensity of the reflected light and a downstream microcontroller encodes and stores information for subsequent reference. According to Siemens, the unique feature in the sensor is the exclusive use of electronic components, thereby reducing its volume to the size of a cigarette packet. Costs of manufacturing the sensor are minimized through the elimination of expensive opto-mechanical components such as lenses and colour filters. This advance has been made possible by the introduction of five plastic optical fibres each having an outer diameter of 2.2 mm; these serve as sensor head and link to the evaluation electronics. The physical separation of sensor and information processor has allowed the probe to be kept at a size suitable for reaching measuring points that were previously virtually inaccessible. Typical applications a r e assembly line inspection (for both on-line and off-line measurements), incoming goods inspection sorting and robotic functions. (Sie-
mens plc, Siemens House, Windmill Rd, Sunbury-on- Thames TW16 7HS, UK) [] 170
Multimedia applications for colour monitor The autoscanning model EUM2951A colour monitor from Mitsubishi incorporates a 29 inch display that accepts inputs from a range of sources: PAL and NTSC composite video, RGB analogue and q'TL, Svideo terminal (separate Y/C), monochrome TTL and stereo audio signals. The monitor comes supplied with a pair of detachable highfidelity speakers and features a wired remote control that enables users to switch freely from one source to another. Mitsubishi's autoscanning system enables the EUM-2951-A to switch automatically to any vertical frequency between 40 and 90 MHz, and any horizontal frequency between 15.5 and 36 kHz. Broadband video circuitry, a comb filter,
and other state-of-the-art video technologies are also incorporated. The 22 x 16 inch screen is housed in a 26 x 23 x 19 inch cabinet, with a full set of front panel controls enabling users to manually adjust video attributes such as tint, colour, sharpness, contrast and brightness; RGB H-phase, H-width, Vposition, V-height, contrast and brightness; and audio volume. Other EUM-2951A front panel controls include source-select for RGB, analogue or video signals and power on/off. The EUM-2951A monitor is fully compatible with all popular PC, PS/2 and Apple Macintosh II display standards. (Mitsubishi Electric UK
Ltd, Travellers Lane, Herts ALIO 8XB, UK)
Hatfield, []
Widescanning for the Big Screen The HJ-6505 coiour monitor brought out by Mitsubishi provides an ultra-high resolution 26 inch display with RGB analogue input and a bandwidth of 110 MHz. It autoscans between frequencies of 45-70 Hz horizontal and 50-80 Hz vertical and is aimed primarily at CAD/CAM and industrial process control environments. However, according to Mitsubishi, it is also suited to applications such as newspaper and magazine publishing, airtraffic control and electricity generating stations, where large amounts of data need to be seen at a glance. Advanced video and deflection circuits are employed by the HJ6505 to ensure stable, clear and bright images without distortion. An in-line, self-convergence design results in high reliability and low power consumption. The HJ-6505's CRT produces a dot trio pitch of 0.31 mm with misconvergence at the centre of 0.3 mm, and elsewhere of 0.6 mm maximum. Display resolution is typically 1280 x
1024 noninterlaced with dynamic beam forming. Dynamic beam forming (DBF) technology ensures the HJ-6505 delivers precise, halo-free picture quality over the entire screen. The technology sharpens the focus at the edges and corners of the screen in order to match the centre as closely as possible. This results in uniform lines over the entire screen area, and offers overall resolution improvements of around 30% over conventional CRTs. Super high contrast (SHC) glass developed by Mitsubishi is used by the HJ-6505 to absorb ambient light both on entry and on reflection from the phosphor screen, resulting in improved contrast and visibility. Other features of the HJ-6505 include an optional tilt-and-swivel base and automatic degauss at power-up. (Mitsubishi Electric UK
Ltd, Travellers Lane, Hatfield, Herts ALIO 8XB, UK. Tel: (0707) 276100) []
DISPLAYS,JULY 1990