SU742988A1 - Device for displaying information on crt screen - Google Patents

Description

The invention relates to computing and can be used in information display systems. A device for displaying symbols on a screen of a cathode ray tube is known, which contains a micro-tact distributor, a register, AND, OR, trigger, function voltage generator, delay element, and corresponding connections {. A disadvantage of this device is its narrow scope. The closest technical solution to the present invention is a device for displaying information on the screen of a cathode ray tube, containing a reception register, a trigger, three groups of AND elements, a micro-tact distributor, OR elements, NOT, a deflecting voltage driver, an inverter, a delay element 2 Disadvantage, this device is a narrow area of its application, due to the ability to display only digital information. The purpose of the invention is to expand the field of application of the device. The goal is achieved by the fact that a device containing the first and second element OR, whose outputs are connected to a deflection system of a cathode ray tube, the modulator of which is connected to the output of the receiving, register, the first input of which is the information input of the device, and the second input is connected to the output pulse generator, the input of which is the control input of the device, a group of OR elements and nine AND elements, the outputs of the first eight AND elements are connected to the inputs of the corresponding OR elements, the outputs The first and second elements OR groups are connected to the corresponding inputs of the driver, the deflecting voltages, the output of the ninth element I is the control output of the device, contains a counter, a shift register, a frequency divider, four keys and an additional driver of the deflecting voltages, inputs which are connected to the outputs of the third and fourth elements of the OR group, respectively, and the exit to the first inputs of the third and fourth keys, the outputs of which are connected to the first inputs of the first and second electrons, respectively ENTOV OR, second inputs of which are connected to

the outputs of the first and second keys, the first inputs of which are connected to the entry of the deflection ramp generator, the first inputs of the first and fourth keys are connected to the first output of the counter, the second output of which is connected to the second inputs of the second and third keys and. with the first input of the ninth element I ;, the second input of which is connected To the output of the frequency divider and to the input of the counter, the third output of which is connected to the first inputs of the first and third elements And, and the fourth input of the counter - with the third input of the ninth element And , with the first inputs of the second element And and the fourth element And, the second input of which is Connected to the second inputs of the first, and the eighth elements And and to the First output of the shift register, the second output of which is connected to: the second inputs of the second and third Elementates And, and the third output - Yhodam schestogo first AND gate and the seventh AND gate, a second input coupled to a second input of the fifth AND elements and a fifth output of the counter, a sixth output is connected to the WTO: fym inputs of the sixth and eighth elemenfOB. And to the fourth input of the ninth Element And, the first input of the shift register is connected to the input of the pulse generator, and the second input - with the departure of the pulse generator, with the frequency divider and with the second $ x 6 of the receiving register ,.

Figure 1 presents the block diagram of the Device; Fig. 2 is a device-generated polygram consisting of triangles I-VIII;

A device for displaying information on a screen of a cathode-ray tube, contains a generator of 1 pulses, a divider 2 frequencies, a counter 3, a shift register 4, a deflection voltage driver, an additional deflection voltage generator b, a group of elements OR 1 - 1, nine elements AND 8 ., - 8d, first and second elements OR 9 and 10, first. The second, third and fourth screams 11, electron beam tube 12 ,. receiving register 13, output control bus 14, input information bus 15, input control bus 16

The device works as follows.

 The start signal on bus 16 starts the pulse generator 1 and sets code 010 in shift register 4. The first pulse from pulse generator 1 shifts the code of register 4 to the right by one bit, i.e. in the shift register - code 001. This code corresponds to the state of register 4, at which a high voltage level corresponding to one, only on the first output

Register 4. Since counter 3 is in state 000, a high voltage level at the first, second and fifth outputs of the counter 3. This state of counter 3 corresponds to the fact that the unit of the shift register 4 through the elements of And 8 and Sj and OR 7 , and 7j is connected to the summing inputs of the driver 5. The next clock pulse changes the state of the shift register 4 (100) so that the high voltage level is only at its third output. In the second cycle, the unit of the shift register 4 is connected only to the subtractive input of the additional imager 6, on the third cycle (the shift register code 4 - 010) to the subtractive input of the imager 5.

Thus, during all: the cycle of the shift register 4, when the counter 3000 is in state, the output of the imaging unit 5 is connected via the key lli and the element OR 9 to the system of deviation in the x-coordinate of the CRT 12, and the output of the additional device 6 in the coordinate deviation of the CRT-12 This corresponds to the formation of an elementary triangular figure 1 (figure 2).

The next clock pulse starts a new cycle of the shift register 4 and, in addition, through the frequency divider 2, changes the state of the counter 3 (100). The next three bars the device works the same as in the previous three bars. The only difference is that in accordance with the new state of the counter 3, the output of the imaging unit 5 is connected to the deviation system in the y coordinate, and the output of the additional imaging device 6 to the deviation system in the X coordinate of the CRT 12.

This corresponds to the formation on the screen of a CRT of the next part of the palette - the elementary figure-11.

Similarly, the following three pairs of symmetric elementary figures are formed. The only difference is that for each such pair of outputs the shift register is connected only to certain inputs of the driver 5 and. 6 according to the determined state of the counter 3,

Twenty-four cycles form a polygram (Fig. 2) Simultaneously with the formation of a polygram, the modulator of the CRT 12 receives a character code from the output of the receiving register 13. In accordance with this code, only those elements of polygrams that make up the contour of the displayed symbol are highlighted.

Claims (2)

After tr, as all the bits of the counter 3 go into a single state, which corresponds to the formation of the last (VIII) elementary figure, the first impulse from the output of the frequency divider 2 through element 8 will begin to flow to the output control bus end of the symbol 14. The device is ready to generate the next character. The proposed device is characterized by a wide range of applications. This is due to the possibility of forming the entire alphanumeric alphabet, a number of target symbols and oriented vectors. Apparatus of the Invention A device for displaying information on a screen of a cathode ray tube containing the first and second element OR, whose outputs are connected to a deflection system of a cathode ray tube, the modulator of which is connected to the output of the receiving register whose first input is the information input of the device, and the second input connected to the output of the pulse generator, the input of which is the control input of the device, a group of OR elements and nine AND elements, the outputs of the first eight AND elements connected to the input damisoot sponding elements or groups you moves the first and second elements or groups are connected to respective inputs shaper deflection voltages output of the ninth AND gate is a control output of the apparatus, wherein; In order to expand the scope of the device by increasing the amount of information displayed, it contains a counter, a shift register, a frequency divider, four keys and an additional deflection voltage generator, whose input is connected to the outputs of the third and fourth OR elements. respectively, the output goes to the first inputs of the third and fourth keys, the outputs of which are connected to the first inputs of the first and second OR elements, respectively, the second inputs of the KOTOfttJx are connected to the outputs of the first and second keys, the first inputs of which are connected to the output of the bias voltage generator, the first the inputs of the first and fourth keys are connected to the first output of the counter, the second output of which is connected to the second inputs of the second and third keys and c. the first input is the ninth element And, the second input of which is connected to the output of the frequency divider and to the input of the counter, the third output of which is connected to the first inputs of the first and third elements And, and the fourth output of the counter to the third input of the ninth element And, with the first inputs of the second An element and the fourth element. And, the second input of which is connected to the second inputs of the first, fifth and eighth elements And with the peril output of the shift register, the second output of which is connected to the second inputs of the second and third elements And, and the third output - to the first inputs of the sixth element And and the seventh element And, the second input of which is connected to the second input of the fifth element And and to the fifth output of the counter, the sixth output of which is connected to the second inputs of the sixth and eighth elements And , the first input of the shift register is connected to the input of the pulse generator, and the second input is connected to the output of the pulse generator, to the input of the frequency divider and to the second input of the receiving register. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 540272, cl. G About K 15/20, 1975. 2. USSR author's certificate in application number 2174210 / 18-24, cl. G About K 15/20, 1975 (prototype).