SU959144A2 - Device for shaping characters on tv receiver screen - Google Patents

Description

(54) DEVICE FOR FORMING SIGNS ON A TELEVISION RECEIVER SCREEN

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

According to the main author. St. No. 744667, a device is known that contains a serially connected memory block, a character code decoder, a character generator, a backlight driver, a switch, an OR block, a register, the second input of which is connected to the output of the clock generator, as well as a serially connected row counter, a row code decoder, the AND element, the output of which is connected to the second input of the OR block, the third input of which is connected to the second output of the illuminator, the second input of which is connected to the output of the memory block, to the second input of the element This and the second input of the switch, the third input of which is connected to the output of the character generator, the second input connected to the output of the code line decoder.

The specified device provides for the formation and selection on the screen of the electron-beam tube of signs in statics: underlining or highlighting by a marker by

Changing the contrast of signs to the opposite (a dark sign on the light background of the rectangle). The capabilities of the selection of character information in the device are used, as a rule, for their intended purpose, to select characters with a marker when editing text and to form graphic forms of table blocks from vertical and horizontal lines 1.

A disadvantage of the known device is the fact that it does not ensure the selection of generated characters in the dynamics, such as flashing. This type of visual coding is necessary to draw the attention of the human operator to new or urgent information displayed on the screen of the indicator in emergency situations, to shorten the search for information with an increased amount of displayed data, provide visual selection of important information, increase the efficiency of the human operator .

The aim of the invention is to expand the field of application of the device by ensuring the formation of signs in the dynamics with a marked allocation by flashing.

The goal is achieved by additionally serially connected to the device, a low-frequency clock generator, an illuminator inhibition pause maker, an NAND element whose second input is connected to the output of the memory unit, and a second And element whose second input is connected to the supply input input commands, and its output - with the input of the input of the shift register.

FIG. 1 is a block diagram of the device; in fig. 2 - code combinations of the words “illumination”: a — view from the output of the character generator, b — view from the output of the illuminator, c — view from the output of the block of OR elements; in fig. 3 - embodiments of the device blocks: a - illumination driver, b - switch, c - block of OR elements.

The device contains a block of 1 memory, a decoder 2 character codes, character generator 3, a 4 line counter, a decoder 5 code lines, a shaper 6 lights, a switch 7, a block of 8 elements OR, the first element AND 9, a shift register 10, a generator 11 clock pulses, the second element And 12, the generator 13 cycles of low frequency, the shaper of 14 pauses of the prohibition of light, the element AND-NOT 15.

In the drawing, the following are indicated: shift register output 16, memory block input 17, build row counter 18 input, input command input 19.

The device consists of series-connected blocks: memory block 1, decoder 2 character code, character generator 3, illumination driver 6, switch 7, block 8 OR elements, shift register 10. The second register-10 shift input is connected to the generator output of 11 horizontal sampling clock pulses, the third input is connected via input 12 to input 19 and through AND-NOT 15 to the output of the luminous inhibition pause 14, the input of which is connected to the output of the 13 cycles low frequency. The second input of the block 8 elements OR is connected to the second output of the illuminator 6, the third input through the element 9 and 9 is connected to the second input of the character generator 3 and the output of the decoder 5 of the line code, the input of which is connected to the output of the counter 4 lines. The output of memory block 1 is additionally connected to the second inputs of the AND 9 element, the illuminator 6, the AND-15 element and the switch 7, the third input of which is connected to the output of the character generator 3.

The device works as follows.

The data in the parallel code, which contains information about the signs and signs of visual coding (mark selection), are recorded at input 17 in memory block 1. In the time intervals of the indication mode from the memory Ylok 1 output, the code of signs and signs of selection (vertical and horizontal lines, marker and blinking) is received: the code of characters through the decoder 2 to the input of character generator 3, signs of marker, vertical and horizontal lines, blinks, respectively. control input of the switch 7, to the second input of the illuminator 6, the input of the element AND 9 and the input of the element NO-15. At the same time from the output of the 4-line counter, controlled by input 18 by counting pulses of the horizontal frequency, through the decoder 5 of the code st The rock to the second input of the character generator 3 receives the signals of the string to be decoded.

Claims (1)

Under the influence of simultaneously received signals, the character generator 3, made on the basis of a permanent storage device (MS 505 REZ), in which the positional program of illuminations of a given alphabet of characters is stored, generates, in parallel code, the corresponding illuminated code word combinations (as shown in Fig. 2a using the letter W) as an example, coming directly and through the illumination shaper 6 to the two inputs of the switch 7. Since the illumination shaper 6 is made on logical NOT (Fig. 3a), then at the output it provides the inversion of the input signals (Fig. 26), and at the inputs of the switch 7 (Fig. 36), there are simultaneously pulse code combinations of the highlight words in the inverse and inverse form. Selective sampling of the received words of the illumination is carried out on the basis of the marker input to the control input of the switch 7. If there is a sign of the marker, the switch 7 passes to the input of block 8 of the OR elements (Fig. Sv) the pulse code combinations of the backlight words in an inverted form (Fig. 26 ), in the absence - without inversion (Fig. 2a). Here, the second and third inputs of the block of 8 OR elements, the backlight pulses of the vertical bar (from the output of the illuminator 6 illuminator) and the horizontal bar (from the output of the I 9 element when there are signals on the inputs of the sign of the horizontal bar from the output of block 1 the memory and, in the considered example, the signal of the tenth line to be decoded from the output of the decoder 5 line codes). In block 8 of the OR elements, in a parallel code, the positional arrangement of the words of the illumination (Fig. 2c) from pulse combinations of the highlighting of the character strings, vertical and horizontal lines before writing them to the shift register 10 is carried out. The recording is made by the input enable signal at the second input of the register 10, which is inputted at input 19 through the And 12 element from the external synchronization device. When writing to the register 10 shift code under. the light generated in block 8 of the elements OR, the clock pulses arriving at the third input of register 10 from the output of generator 11 convert the received pulse combination from a parallel form into a serial one synchronously with the raster scan in the display unit. Formed, at the output of the shift register 10, the video signal is output from output 16 to the display unit to control the intensity of the backlight of the electron beam. Passing through the AND 12 signal of the destruction of writing to the shift register of the pulse code information of the illumination is due to the presence at its second input of a positive polarity signal from the output of the AND-NE element 15, which is formed in two cases: first, in the absence of its first input of the blink sign signal, regardless of the presence at the second input of the signal from the shaper output of 14 pauses of the illumination prohibition and, secondly, in the absence of the second input of the AND-15 element from the output of the shaper of 14 pauses even if there is the first input of the flicker sign signal from the memory block 1. The shaper of 14 pauses of a ban of a highlight can be executed according to the circuit of the one-shot. When pulses of 1-5 Hz frequency from the output of the low-frequency generator 13 arrive at its input, it generates pulses of positive polarity at the output, the duration of which can be adjusted within the period of the following low strokes. frequencies. At the moment of coincidence of these pulses and pulsed signals of the blinking sign at the input of the NAND 15 element, negative pulses will be generated at its output, prohibiting the passage through the AND 12 element of the write resolution signal into the shift information register 10 of the code information of the highlight words. At the output of the ret (the gistra 10 at that moment the video signal of the illumination of the characters is not formed, and on the screen of the external display unit the sign information displayed, marked with a blinking sign, is lost for a period of a pause of the prohibition of light, then marked on the blink sign, the sign information will flash with the frequency of the low-frequency clock, thereby enhancing the visual perception of the distinguished characters. the known device by additionally introducing into it a low-frequency generator, a pause generator of the prohibition of illumination, logical elements AND, AND-NOT, provides it with an extension of the functional capabilities by forming characters in the dynamics with a marked allocation by their flashing. additional information about the data generated by the device, which, along with an increase in the information content of the indicator screen, on which such information is displayed TC, helps to increase the efficiency of the operator and the indicator device and improve the perception conditions of the displayed data by the operator. This increases the search speed and shortens the response time of the person. The selected information contributes to a more rapid assimilation of it. The proposed device in comparison with the known has a wider functionality, and, consequently, the area of use. The additionally introduced blocks practically do not increase the hardware volume of the device, since they can be implemented on the basis of two microcircuit packages of typical series 136, 133, 155, etc. Formula of the invention A device for generating marks on the screen of a television receiver according to the author. St. No. 744667, characterized in that, in order to expand the field of application of the device by ensuring the formation of signs in the dynamics with a marked allocation by their flashing, sequentially connected low-frequency clock generator, shaper pauses lights, the element AND-NOT, the second input of which connected to the output of the memory unit, and the second element And, the second input of which is connected to the input of the input command, and its output - to the input of the input of the shift register. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 744667, cl. G 09 G 1/16, 1977 (prototype). (m.f T nineteen 1L jI / | 2 | W | 515 7 | 5 | | // | / У1 five fe.2 Run l cmpOK