SU809256A1 - Information display device - Google Patents

Description

(54) DEVICE FOR DISPLAYING INFORMATION

The invention relates to automation and computer technology and can be used to display information in the form of text characters from an electronic digital computer on a screen of a cathode ray tube (CRT).

Devices for displaying symbols on a CRT screen are known, consisting of a control unit, an interlocking buffer memory unit, registers, digital-to-analogue converters, and a CRT 1.

The closest to the present invention is a device containing a control unit interconnected with a buffer memory unit, the first and second outputs of which are connected to the first inputs of the first and second registers, respectively, and the third input - to the input of the backlight pulse shaping unit, the output of which is the device output, the first and second outputs of the control unit are connected to the second and third inputs of the first and second registers, the outputs of which are connected to the inputs of the first and second code-voltage converters Twain 2.

The disadvantage of these devices is their complexity.

The purpose of the invention is to simplify the device.

The goal is achieved by the fact that the device contains a glint of permanent memory, the third and fourth code-voltage converters, two adders and a third register, the first and second inputs of which are connected to the fourth and fifth inputs of the control unit, the third input the third output of the buffer memory block, and the outputs to the inputs of the constant memory unit 5, the outputs of which are connected to the inputs of the third and fourth code-voltage converters, respectively, whose outputs are connected to the first inputs of the corresponding totalizers to orym inputs of which are connected outputs of the first and second code converters, voltage, respectively.

The drawing shows b ,; k-scheme

5 devices.

The device contains a control unit 1, the first and second registers 2 and 3, the buffer memory block 4, the third register 5, the first and second code-voltage converters 6 and 7, the block

8 constant chips, the first and second adders 9 and 10, the block 11 for forming light pulses, the third and fourth converters 12 and 13 code-voltage.

The device works as follows.

Under the influence of a control signal generated in the control unit I and arriving via the bus t. /., The first and second registers 2 and; - reset to zero. Then, under the influence of the control signal sent in block 1 and coming through the bus to registers 2 and 3, from C; chL-: and 4, the buffer memory is sent: ;;; one address point of the XO, VO symbol. The contents of registers 2 and 3 are transformed in the first b and second 7 transforms: voltage x code voltage, respectively, in voltages and. And Uy. Which are the first 9 and second 10 adders supplied to the corresponding CRT deflection system,

Under the influence of the control signal generated in block 1. stomping along the bus, third: ;;,.:. 5 is reset to 0. Then ..: Led by the action of the control ck, generated in block 1 and ios. Bus stupor, in the register: 3 blocks of buffer memory 4 send: - / - ;;;.; character code that is represented by: l; is a single number in the digital code.

Under the influence of the code, located on the register 5, from the block of constant .. S

:: - a sequence of numbers in.:.: ;; - 03014 binary code, represented by ... lo: is the increment of the coordinates of the points: l-g: aola relative to the address point. Soda values of the increments of the 5x, yj symbol coorat are converted. in the third 12 and quarter HZ converters, the code — for example — .--: the voltages C and U, which in -: the ummah, the torac 9 and 10 are summed up with the U -; --Op Ie resulting in their stresses; the voltages U and U are relieved, the iodine acting on which the trail of the electric beam in the plane of the CRT screen abruptly moves along the gauge A35.

Under the influence of control sigj- .ios ;,; developed in. block I and enters via bus e, the pulse shaping unit illumination 11 generates pulses Uj, which are supplied to the cathode or control electrode of a CRT, which provides illumination of the electron beam in points, the totality of which is the displayed symbol.

Claims (2)

1. Govorov B.C. Display of machine solutions on CRT screens. M., Soviet Radio, 1975, p.93. 2. Prince M.D. Machine graphics and design automation. M., Soviet Radio, 1975, p.26 (prototype).