SU1242927A1 - Device for displaying information on srceen of television display - Google Patents

Abstract

The invention relates to automation and computer technology and can be used in devices for outputting text and graphic information on a CRT. The purpose of the invention is to increase reliability by simplifying the device while simultaneously expanding its functionality. The device contains a generator, a conjugation unit, a character generator, a first register, three flip-flops, I and NW elements, a one-shot and a display unit with corresponding connections. New in the device are the additionally introduced three triggers, the second register, the AND-OR-NOT element and the inverter with the appropriate connections that provide control of the power and image inversion. Zil. G & (L to 4 oo about 1C

Description

The invention relates to automation and computing and can be used in devices for outputting textual and graphical information on a CRT.

The purpose of the invention is to simplify and expand the field of application of the device by introducing functions for controlling brightness and image inversion.

Fig. 1 is a block diagram of a device for displaying information on a television indicator screen; figure 2 - the timing diagram of the device; on fig.Z - timing diagram, the second register in synchronizer mode.

The device contains a television indicator 1, a single vibrator 2, a block 3 of conjugation, a character generator 4, the first register 5, the first 6, the second 7, the third 8 and the fourth 9 triggers, a generator of 10 pulses, the fifth P and the sixth 12 triggers, an inverter 13, evil AND 14, element AND-NOT 15, second register 16 element AND-OR-NOT 1 7, element OR-NOT 18.

The device works as follows.

The unit 3 of the interface in the mode of regeneration of information under the control of the synchronization signal (CC) outputs the signals: character codes to be rendered (DVO-DVB), codes of the current TV line number (TVO-TVZ), switching Russian, Latvian registers (RUS -LAT), video signal suppression (HB) 5 luminescence resolution (PC), brightness control (CL / SL), TV line synchronization (OXC), TV frame synchronization (OCC), image inversion control (UI).

The temporal ratios of the output signals are presented in Fig. 2, where f is the period of point synchronization; f is the maximum delay of the TVO-TVZ, RUS / .PAT, GV, PC, CL / CL, UI, OCS signals relative to the CC signal; G is the maximum delay in the appearance of the DVO-DV6 signals, the total cholesterol count is relative to the CC signal; T, is the period of the synchronization signal of the block of 3 conjugation.

The timing diagram (Fig. 2) is presented for a variant of seven points of sign decomposition and one point. And an inter-character interval. Fuik1 ionization of the device does not change in principle

and with other sign decomposition matrices,

Whereas for for any. By practical image parameters the condition is fulfilled.

 mw ss

where Sriav is the maximum signal delay, a synchronization pulse can always be formed, by means of which such delay is compensated, i.e. The beginning of the output of the information and video signal to the television indicator is synchronized from the beginning of the 14p of each TV line, which ensures correct and stable visualization of the image. In the proposed device, this is implemented by delays on triggers 6-9 and P under the influence of a signal from trigger output 12. To eliminate distortions along the fronts of the signal that is generated by trigger-er 12, the synchro-generator is built on an annular shift register 16 and element And 14. For ensuring the operation of the device, one sync is generated. However, such a synchro-generator provides the possibility of forming sync serials with a period T with eight gradations of durations and time shifts following the generator frequency period (Fig. 3). So, for example, the signal CC can be formed from the output of the register 16.

Sign generator bus is free after

t 4 t r

i -1 inr

where „is the delay in the occurrence of information at the output of the character generator relative to the signals at the input.

If there is a write enable signal (trigger output 12) at the input of the first register 5, the recording is performed with the subsequent conversion of the character generator code 4 into a sequence that enters indicator 1 through the formation schemes on the I-ILN-NE element 17, inverter 13, element H-FIE 15 and the element OR-HE 18, and the delayed inverse image signal generated at the seventh output of the interface block through the trigger 11 controls the AND-OR-HE element 17, passes without inversion

or inverts the video signal from the output of the first register 5. The image is blocked in the inter-character and line spacing, with reverse moves of the line and frame, carried out by the delayed signal from the output of the trigger 6. On the IS 15 element.

The cursor is visualized by a delayed signal from the output of trigger 7 on the OR-NOT 18 element, for example, once every two frames (flickering cursor).

The synchronization signal of a TV frame generated from the sixth output of block 3 of the match arrives at indicator 1 directly and does not require a delay, since the beginning of the forward run of the frame always precedes the start of the forward run of the first line by

1 -2 MKS t

j /

To ensure that the raster is centered on the image line relative to the center of the screen, the signal from the output of flip-flop 9 is generated by the one-shot 2.

Thus, the device layout is simplified, as well as functions for controlling brightness and image inversion (trigger 8, inverter 13, trigger II, AND-OR-NOT 17 element) are introduced. Increase the reliability of the device due to the formation of the recording signal in the triggers 6-9 and 11, as well as the resolution of the recording of the formation of the signal in the first register 5 on the second register 16, the element 14 and the trigger 12.

Claims (1)

Invention Formula A device for displaying information on the screen of a television indicator, containing a single vibrator, the output of which is connected to the first input of the television indicator, a interface unit whose input is an input of the device, the outputs of the first and second groups of outputs of the interface unit are connected to the inputs of the first and second groups of character generator inputs the first output of the interface block is connected to the control input of the character generator, the outputs of which are connected to the inputs of the first group of inputs of the first registers, second, third, quarter and fifth outputs of the interface block are connected respectively to the first inputs of the first, second, third and fourth fifth triggers, pulse generator, fifth and sixth trigger, inverter, AND AND AND-NOT elements, characterized in that, in order to simplify and expand the area of application of the device by introducing the functions of controlling the brightness and image inversion, it contains the second register, the AND-OR-NOT element and the RSHI-NOT element, the output of which is connected to the second input of the television indicator, the third input to then connected to the sixth output of the interface block, the first input of the element OR NOT is connected to the output of the element AND-NOT, the first input of which is connected to the output of the element AND-OR-NOT, the first and third inputs of which are connected respectively to the inverse and direct outputs The fifth trigger, the first input 5 of which is connected to the seventh output of the interface block, the fourth output of the AND-OR-NOT element is connected to the output of the inverter, the input of which is connected to the output of the first register connected to the second input of the AND-OR element first entry first register connected to the output of the pulse generator connected to the first input of the sixth trigger and the first input of the second register, the second input of which is connected to the first output of the second register, the second and third outputs of which are connected respectively to the first and second inputs of the element 0 And whose output is connected to second the sixth trigger input, the output of which is connected to the second input of the first register, to the second input of the fifth trigger, to the second inputs 5 of the first, second, third and fourth triggers, the output of the first trigger is connected to the second input of the NAND element, and the second output of the second trigger connected to the second input 0 of the element OR NOT, the output of the third the trigger is connected to the fourth input of the television indicator, and the inverse output of the fourth trigger is connected to the input of the one-shot. n & , with Hi 3-116 17 //  "JAH „R 1 tt TSO-T8J Rus / Lot r8, PC ./ (ff m / ff ffjf / f oxc ZSH. doff. Sb / x.2 don. KG Bb /; fT / 6 W / fG OXC-i FIG. g 1pKG 2rNb SpKG 123 567812345678 ppppppppppppppppppp Tc I 2 J 6 Editor E. Papp Compiled by L.Abrosimov Tehred N. Boikalo Corrector E. Sirohman Order 3705/47 Circulation 671 Subscription VNIITTI USSR State Committee for inventions and discoveries P3035, Moscow, Zh-35, Raushsk nab, 4/5 Production and printing company, Uzhg .n P t eight . Fig.Z town, st. Project, 4