RU1827683C - Device for producing image sings on tv indicator screen - Google Patents

Abstract

Usage: automation and computer engineering, systems for displaying alphanumeric, alphabetic-mosaic and graphic information. The device contains 1 input unit (1), 1 memory unit (2), 1 character generator (3), 1 shift register (4), 1 video shaper (5), 1 synchronizer (6), 1 television indicator

Description

The invention relates to automation and computer technology and can be used in the construction of systems for displaying alphanumeric, alphabetic-mosaic and graphic information.

The purpose of the invention is to simplify and expand the scope of the device due to the ability to scale its fragments when forming characters.

In FIG. 1 shows a structural diagram of the proposed device; in FIG. 2 is a functional block diagram of a scaler; in FIG. 3 - image of symbol A on a 2: 1 scale along the horizontal and vertical axes; in FIG. 4 - the same symbol in scale 1; 1 on both axes (a) and a symbol with scales 2: 1 along the horizontal axis and with a scale 1: 1 along the vertical axis (b).

A device for generating characters on a television indicator screen comprises an input unit 1, a memory unit 2, a symbol generator 3, a shift register 4, a video signal conditioner 5, a synchronizer 6, a television indicator 7, a scaling unit 8, and an encoder 9.

The scaling unit 8 comprises a first counter 10, a second counter 11, an OR-NOT element 12.

The device operates as follows.

Using the input unit 1, the numbers of displayed symbols, their attributes, in which the display form, the scales along the horizontal and vertical axes, the segment number are recorded, are recorded in the memory unit 2. The vertical axis scale and part of the attribute (segment number) from the memory unit 2 are supplied to the inputs of the encoder 9. In addition, from the synchronizer 6 to

00

go about

00 gj

encoder 9 provides a raster string code. The encoder 9 generates the code of the transformed raster line, which is supplied to the 3-character generator. Also, symbol number codes from the memory unit 2 are supplied to the symbol generator 3. The symbol / wob generator 3 generates as an encoder the terms of the raster string of familiarity, which are fed to the inputs of the parallel recording of the shift register 4. The other inputs (control inputs) of the shift register 4 from the scaling unit 8 are supplied with control signals, i.e., a shift signal and a mode (mode) signal, which are generated by the scaling unit 8, i.e., counter 11, counter tO and element 12 AND / 1I-NOT, but depending on the scale along the horizontal axis, which is issued by the memory unit 2, and the clock signals coming from the synchronizer b. Using these control signals, the sdpig register 4 is scaled up. The output of the counter 11 (B) is connected to the input of the counter 11 (L), and this ensures that the counter 11 is loaded with a scale code on the horizontal axis at the moments of shift in the shift register 4 of the current bit of the thermal break line of familiarity. Thus, using the subtracting counter 11, the shift signal of the shift register 4 is generated depending on the leading clock pulses, respectively, of the scale code along the horizontal axis. The signals for changing the display elements from the output of the counter 11 are fed to the subtracting input of the counter 10, which, as a result of counting 16 display elements with the help of the element 12, OR-NOT generates a signal of the load mode of the shift register 4. The inputs R of the counters 10 and 11 are combined and a beam blanking signal is applied to them.

Thus, a beneficial effect is achieved due to the following factors. The first binary subtracting counter used in the scaling unit 8 is connected to the parallel recording input, and a scale code is supplied to the other parallel recording inputs. As a result of this, when displaying characters with different scales, there is no need to change the duration of the horizontal and vertical blanking pulses. In addition, by connecting the counters 10 and 11, a compact circuit is formed capable of generating control signals for the shift register 4 depending on the current horizontal scale, thereby simplifying the device.

Claims (2)

1. A device for forming an image of characters on a television indicator screen, comprising an input unit, the output of which is connected to the address and information inputs of the memory unit, the first output of which is connected to the first address output of the symbol generator, the output of which is connected to the information input of the shift register, the output of which connected to the first information input of the video shaper, the control input of which is connected to the first output of the synchronizer, and the output is connected to the information input of the television an indicator, characterized in that, in order to simplify and expand the scope of application of the device due to the ability to scale its fragments when forming characters, it contains a scaling unit and an encoder, the first information input of which is connected to the second output of the memory unit, the third output of which connected to the second information inputs of the video signal generator and the encoder, the output of which is connected to the second address input of the symbol generator, the address input of the encoder is connected to the second synchronizer output, the third output is connected to the clock input of scaling unit having an information input connected to the output of the fourth memory block scaling output is connected to the input of shift register shift control unit. 2. The device according to claim 1, characterized in that the scaling unit contains two OR-NOT counters, the inputs of which are connected to the outputs of the first counter, the subtracting input of which is connected to the output of the transfer pulse of the second counter connected to its installation input, the output of the transfer pulse the second counter and the output of the OR element is NOT the output of the block, the information inputs of the second counter are the information input of the block, the reset inputs of the second and first counters and the subtracting input of the second counter are the clock input block house. F # g.2 J0 // 9 /} /// 7 UЈ / ff / - // ffЈ / 7Ј 3 0 # /; Z 7Ј & // ff30ft tl ill y § ll II I 111 Hi 1G II -W W III t 1 ksht Mdshl7 & Ј f -f / 70eqpL / 30 # / r7.Ј / Јe / 77t / si & s & AfffCtt // 77 & $ / eq0v30 # / n0 / M0Јs # c & / Y {7са // тг (Ј / / ffff 0e / / ffe // ftf / 7 # 0Ј lcd f & a4e