SU993311A2 - Device for forming symbols on television receiver screen - Google Patents

Description

The invention relates to automation and computing and can be used in display devices with progressive and interlaced scanning of television or small format rasters.

According to the main auth. 744667, a device is known comprising a sequentially connected memory block, a character code decoder, and a character generator connected to a character code decoder connected to the counter. rows, a clock generator connected to the register, an AND element connected to the memory block and a code line decoder, and a series-connected backlight pulse generator connected to a character generator and a memory block, a switch connected to a character generator and a memory block, and a block of elements OR connected to the illumination pulse former, the AND element and the register.

The known device provides for the formation of sign information on the screen of the electron beam of the tube and its isolation by drawing vertical and horizontal lines, for example, when forming blank forms of faces, or changing the contrast of the characters backwards when the sign is highlighted. mogonkatnemny sign).

A disadvantage of the known device is that it does not have the ability to form or isolate an important one. information of prolonged exposure in various ways, for example, pr 10 lm or in italics. In the course of work, the operator of the indicator device spends a considerable amount of time searching for important data, since all lines of the character information KA15 are lit with the same font and he has to consistently read the information displayed line by line when searching for the desired line. When this time to search for the desired string

20 of the information is greatly increased. This leads to a decrease in operator productivity as a result of a long search, and due to fatigue of a person’s eyes. This inequality manifests itself even more with. decrease in the size of characters and with an increase in the amount of sign data displayed on the screen. In this case, the number

Claims (1)

30 errors, tolerance “l {operators When processing and assimilating the displayed information. The purpose of the invention is to expand the scope of application of the device by forming the signs of straight and italic fonts. . The goal is achieved by the fact that the device additionally introduces a second element And an iHo puller connected a delay unit, a selection unit, a second switch and a backlight pulse width generator, the output of which is connected to the input of the clock generator, the second inputs of the selection unit and the second switch are connected respectively to the outputs the decoder code line and memory block 1, and the third input of the second switch input of the delay unit and the first input of the second element And connected to one of the control inputs of the device, etc. goy yuiday control input coupled to the input of the second AND gate, whose output is connected to a control register loading WHA resolution. Fig. 1 shows a block diagram of a device for generating characters; Fig. 2 shows examples of forming and highlighting characters; FIG. 3 — variants of the implementation of individual units of the device. The device contains block 1 of memory, decoder 2 character codes, character generator 3, 4 lines counter ,. a decoder of 5 lines of code, shaper b of backlight pulses, first switch 7, block 8 elements OR, element 9, register 10, generator 11 cycles, television receiver 12, block 13 delays, block 14 selection, second switch 15, shaper 16 long of the illumination pulses, second evil AND 17, input 18 of memory block 1, 1 input 19 of the counter 4 lines, input 20 named after the input information input into register 10, input 21 of information input prohibition into register 10, the device operates as follows. Data containing information about the code of characters and signs of the selection of characters is recorded in parallel code at input 18 in memory block 1. In the time intervals, the indication modes from the output of memory block 1 are received. the binary code of the characters through the decrypt jpaTopa 2 block of the character code to the input of the symbol 3, and the data of the attributes (marker, vertical and horizontal line, direct or oblique font, respectively, to the control input of the switch 7, to the input of the imaging unit 6 pulses, to the input of the And 9 element and the control input of the switch 15. Simultaneously from the output of the 4-line counter controlled by input 19 by countersuch line frequency pulses, the decoder signals are transmitted to the second inputs of character generator 3, element 9 and block 14 of the selection through decryptor 5 Under the influence of simultaneously received signals, the character generator 3, made on the basis of a permanent storage device in which the positional program of the illuminations of the displayed alphabet of characters is stored, generates in the output in parallel form the corresponding illuminated string of the sign of the character of the illumination, directly and through driver 6 pulses to the two inputs of the switch 7. Since the driver b pulses are made on the logical elements NOT {fig.3c (}, then the output it provides an inversion of the input signals at inputs of the switch 7 thus present simultaneously pulsed illumination codewords words in direct and inverted form}. Selective sampling of incoming words under the light is carried out on the basis of the marker input to the third control input of the switch 7. When there is an indication of the marker ko1, 1mutator 7 (Fig. 35) passes to the input of block 8 of the elements OR the circular combinations of the illumination words in an inverted form, in the absence of - without inversion. The second and third input of the block .8 elements OR (Fig. 3-) receives the pulses of illumination of the vertical line from the second output of the imaging unit 6 and the Horizontal line from the output of the AND 9 element by matching at its inputs the signal of the sign of the horizontal line from the output of block 1 and the signal that decoded string from the output of the decoder 5 of the code of the string on which a horizontal line is to be formed. using the elements of OR block 8, the final spatial-positioning arrangement in the parallel code of the words of the highlight is made of pulse combinations of highlighting of the character lines, a vertical bar with the horizontal bar's light pulses before writing them to the register 10 (FIG. 2a). authorization input through input 20 through AND 17 of the external 1X1 synchronization device to the second input of register 10 and directly to the second input of switch 15 and its third input through delay unit 13 (Fig. 3g) and selection block 14 and, to the other input of which (Fig. 30) signals of deciphering lines are received from the output of the decoder 5 of the line code. Delayed signals arrive at the output of the selection unit 14 from the advance unit 13, with a maximum delay on the percussion line of the sign, and as the line number grows, the delay of the signals decreases by a constant value until the line corresponding to the last line of the character equals zero . Thus, at the second and third inputs of the switch 15 simultaneously there are signals without delay and delayed. If there is no sign of an oblique font, from the way of the 1 Ps.iti unit, through the switch 15, the input of the illumination pulse generator 16 receives a signal without delay directly from the input 20, according to the slope font character, with a delay in the bloc 13. The shaper 16 is made according to the scheme one-shot (or a trigger ensures the formation of positive-polarity pulses, the duration of which is set by the time it takes to form the illumination points on the row of the matrix maths of the homopolis. The signal generated at the shaper of the shaper 16 is fed to the input The speed of the controlled oscillator is 11 clocks. From the output of the oscillator 11, the clock shift pulses arrive at the third input of the register 10, under the action of which the pulse combination of the illumination words from parallel forgchl to the sequential synchronous raster scan in the receiver 12 is converted into register 10. The generated At the output of the register 10, the video signal is fed to the input of the receiver 12 to control the intensity of the electron beam illumination, forming on the screen of the television receiver. Signs that are not marked by a sign of tilt, g- is the right font, and . marked - oblique font (Fig. and "). The proposed device provides visual selection of the displayed data, improves the readability of the sign information, since the characters formed by italic type have increased linear dimensions (formed on the increased field of the rectangular matrix), improve the conditions for the perception of information by the operator, increase the efficiency of its work, increase the speed and accuracy of recognition and identification of displayed data, shortens the time of important information with the total amount of displayed data, reduces the lo errors in the processing and assimilation of data displayed. Compared to other visual coding methods (backlighting, flickering, reverse contrast, changing luminance, etc.), highlighting the displayed information in direct and oblique font does not impede the optimal display mode. Focus, brightness, clarity, contrast of shaped characters affecting fatigue can be reduced. operator’s vision) does not reduce the amount of data “x” on the display screen, which is affected by the selection of data by increasing the format of characters. The invention The device for forming characters on the screen of a television receiver according to the author. 744667, characterized in that, in order to expand the field of application of the device by forming characters in direct and oblique fonts, a second element AND and a serially connected delay unit, a selection unit, a second switch and a backlight pulse width driver are introduced into it, the output of which is connected to the input the clock generator, the second inputs of the selection unit and the second switch are connected respectively to the outputs of the line code and memory block decoder, and the third input of the second switch, the input of the delay block and the first input a second AND gate connected to one of the control inputs to Dih device another control input coupled to a second input of the second element and whose output is connected to the input of register loading resolution. No f f tf you go Ijh Yu I 17 13 Fi & .1 g t§ with tagy1e t "about .one §