Determine about the Pick Device

Light Pens

The light pen used to select screen positions by detecting the light coming from points on the CRT screen. These are sensitive to the short burst of light emitted from the phosphor coating at the instant the electron beam strikes a particular point. Other light sources, such as the background light in the room, are usually not detected by a light pen. An activated light pen, pointed at a spot on the screen as the electron beam lights up that spot, generates an electrical pulse that causes the coordinate position of the electron beam to be recorded. As with cursor-positioning devices, recorded light-pen coordinates can be used to position an object or to select a processing option.

 

Posted Date: 9/3/2013 7:13:09 AM | Location : United States

Ask an Expert

Related Discussions:- Determine about the pick device, Assignment Help, Ask Question on Determine about the pick device, Get Answer, Expert's Help, Determine about the pick device Discussions

Write discussion on Determine about the pick device
Your posts are moderated

Write your message here..

Related Questions

INTERRUPT METHOD, interrupt method in keypad operation coding using PIC16 interrupt method in keypad operation coding using PIC16

Define the analysis that determines the meaning of statement, Analysis whic... Analysis which determines the meaning of a statement once its grammatical structure becomes known is termed as? Ans. The meaning of a statement when its grammatical structure b

Subprogram to output the result, Input a list of positive numbers (terminat... Input a list of positive numbers (terminated by 0) into an array. Find the largest number in the array, and into the result. Use a subprogram to input the numbers, a function to fi

Explain the race around condition, Explain the Race Around Condition? C... Explain the Race Around Condition? Consider the inputs of the JK flipflop j=1 and k=1 and Q=0 when a clock pulse of width tp is applied the output will change from 0 to 1 after

Design a sample counter, Let's design a synchronous BCD counter. A BCD coun... Let's design a synchronous BCD counter. A BCD counter follows a sequence of ten states and returns to 0 after count of 9. These counters are also known as decade counters. This typ

What is mmx technology, What is MMX Technology MMX Technology: MMX (M... What is MMX Technology MMX Technology: MMX (Multimedia extensions) technology adds 57 new instructions to instruction set of Pentium - 4 microprocessors. MMX technology also

Interfacing of keyboards, Q. Interfacing of keyboards? The keyboard emp... Q. Interfacing of keyboards? The keyboard employs a special Input/output port which is similar to a serial port however doesn't explicitly follow the RS-232 serial port standar

What is the pcm pulse or symbol transmission rate, An analog information si... An analog information signal, whose maximum frequency is 6000Hz, is to be transmitted using a PCM system. The quantization error must not exceed the ±1 % of the peak-topeak analog

Convert statement into conjunctive normal form , Consider the following sta... Consider the following statements about the types of fruit people like. If people like apples, then they do not like oranges. If people do not like apples, then they like orang

What are the static and dynamic hazards in logic circuits, If for a short p... If for a short period of time circuits goes to some dissimilar logic level then it is assumed to have then it is known as static hazard e.g. If the final logic value of output of a