JPS58107587A - Character information display unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a character information display device, and particularly to a character information display device 1 having a one-leg display portion and a movable display portion on the screen.

Currently, there are various types of text information display devices that use shadow lines. There are display methods such as displaying by moving the screen upward, and combinations of these methods are also being considered. Jin's character information display device is used in the Captain System, which has recently been attracting attention, teletext receivers, and various display terminals. Academic conference 91980. It is published in "Vol. 34, No. 10" and is available on the Captain System terminal.
/% is described on page 893 as "Center equipment and user terminals." Taking the Nakayaputen system as an example, the Nakayaputen system consists of a fixed display part S and a movable display part in terms of playback surface configuration. However, it is arranged so that a movable display section is placed below it. This movable display section is called a vertical starrow As, and reproduced characters are moved from the lower end of the cathode ray tube toward the fixed display section. Of course, it is also possible to stop the movement and display the fixed display form 1aAK by the user's selection. An example of such character information display 'iit will be explained with reference to FIG.

Figure 1 shows a bottle stand to which the Captain System IK is applied, and the image information data sent from the information center using the telephone line IIt is received by the VS Suehiro and the data is sent to the main control unit's microphone so-called processor ( (hereinafter referred to as 1cOPU), and performs 7-ladder processing, error processing, and descramble processing. After this processing, the necessary data is written in the required positions of the pattern information 111 memory and the color information memory, and the signals are sequentially output in synchronization with the scanning of the auricular limbal tube and combined into R, G, and B signals, which are combined using a color encoder. After converting the video signal, it is RF modulated and
TV reception using empty channels in the gν band11
The necessary information is sent to the device (internal part of the terminal). The information data received and received as described above is supplied to the terminal 11 and input/output capo) 12[31]. This input/output boat 12 is used for exchanging sent data and input/output of system data, and the data passing through the input/output boat 12 is subjected to arithmetic processing in the 0PU 13. This CPU 13 processes data according to a program stored in a read-only memory (hereinafter abbreviated as ROM), not shown, and during the production of the calculation. To temporarily store data, a work area 't- of a random access memory (hereinafter abbreviated as KRAM) (not shown) is secured and utilized.

The preset value of the display counter processed by this 0PU 13 is output to the switching circuit 14 via the input/output port l'2Y. This switching circuit 14 is also supplied with the leading value set output from the leading value setting circuit 15, and this switching circuit 14 selects and outputs one of the data. The switching operation of the switching circuit 14 is controlled by the output of the ROM 16, and the ROM 16 is overloaded by wAm by one counter. That is, counter 1
2 is synchronized with the tesivision signal and generates a t counter output, and is composed of a line or pit counter, etc. This counter output pulse is stored in the ROM 16.
is input. In this ROMI 6, counter 17
Output pulses having different timing and pulse width are outputted by the counter output pulses from the counter output pulses. Keizu No. 1
Assuming that the output pulse vP1 is the horizontal synchronizing signal vJks as shown in FIG. 2, this horizontal synchronizing signal V is shown in FIG.
It will be as shown in b). The generation of this pulse P1 indicates that the final horizontal period of the fixed display section [the period shown by (I) in Fig. 2 (a) during ritual] is input to the '1350 PU13, and this pulse P1 is generated. Then, a message appears to indicate that the moving display section will be entered next. Also output pulse P! As shown in FIG. 2(C), this pulse pg is generated once during the final horizontal blanking period of the fixed display section, and the output of the switching circuit 14 is selected by this pulse pg. In other words, only during the period when this output pulse pg occurs, the output of the switching circuit 14 transfers the vertical counter 18 preset data from the PU 13 (! The switching circuit 14'4 controls the data transfer.The preset data selected by the switching circuit 14 is supplied to the vertical counter 18 and preset.-This counter 1BK receives the output pulse P3 from the ROM 16. This pulse pm is for presetting the vertical counter 18', and the vertical counter 1BK is set to the preset data value from the CPU 13 by this pulse PIK, that is, the next moving display of the fixed display section. The output of the vertical counter 18 is added to the dot pattern memory 19, and together with the horizontal counter 20, the value of the first line of the vertical counter 18 is set to Kv.
Foot turn memory 190 is input, and this memory 19
The output is converted from parallel data to serial data by a parallel-serial conversion circuit 21 and output. On the other hand, the daily output of the vertical counter is also supplied to the ROM 22, and the ROM 22 is used to self-preset the vertical counter 18. That is, this preset pulse is the output of the xpasROM 22 and is supplied to the vertical counter 1B. This pulse P4 is generated in the horizontal blanking period following the final horizontal period of the fixed display section, as shown in FIG. 2 (6). I! The direct counter 18 presets the last one of the final display area of the pulse pmVC during the final horizontal blanking period of the fixed display section, and is preset by the pulse P4 during the next horizontal blanking period. Ru. Therefore, this pulse pm and P4
It is necessary to output the first preset my within the period in which
The first preset value is preset using preset data from the PU 13.

In other words, during the period when the pulse PI exists [the output of the CPU 13 is transmitted to the vertical counter 8 via the switching circuit 14 and preset by the first preset value, after that the preset value is input from the KOPU 13 every vertical to period. , and one page is sequentially moved from bottom to top within the range of the moving display section.

In this way, the fixed display section and the movable display section can be simultaneously reproduced on the kh life surface, and the same 5 vertical scrolls can be performed from bottom to top on the movable display section.
To perform this vertical scrolling, the vertical counter is sequentially self-preset or a leading value set circuit or CP is used.
It is necessary to preset with the preset value from U, and in the case of the circuit configuration shown in Figure 1 of Jin, it is necessary to use a switching circuit to switch the CPU and start value preset circuit output for each predetermined line. , a problem arises that requires a complicated circuit configuration.

The present invention improves these points and provides a character information display device that can be easily configured in terms of circuitry and that can operate in the same way as the conventional ones! This is the measurement that is provided.

The character information display device according to the present invention will be described below with reference to figure #IJv. FIG. 3 is a circuit diagram showing the overall configuration thereof, and the structure is the same as that shown in FIG. 1. The same number is given to the ts portion, and detailed explanation thereof will be omitted.

In FIG. 3, the output of the input/output port 12 is directly input to the vertical counter 18&c without going through a switching circuit, and the output of the ROM 16 is two outputs, Pl and PtO, which are added to the CPU 13 and the vertical counter 18. This is very different from the one in Figure 1. In other words, the counter output synchronizes with the television signal, and the counter output pulse vROM16#
f: Input.

This ROM 16 outputs a pulse P (equivalent to PsK shown in FIG. 1) to be input to the vOPU 13 during the final horizontal period of the fixed display section, and also outputs a pulse P1 (equivalent to PsK shown in FIG. 1) to be preset to the vertical counter 18. PmK phase) are output respectively, and the pulse Pf [therefore, the vertical counter 1
8 is set to the pre-root data value from 0Ptl13. These pulses P.

The relationship i between Pl and the horizontal synchronization signal is shown in Figure 4, where Figure 4 (a) shows the horizontal synchronization signal, and Figure 1 (b) shows the relationship between RO and
M16 output pulse P・t% FIG. 4(c) shows the callus P1 output from the ROM 16, and the output pulse P- of the ROM 22 is shown in FIG. A pulse P- is applied to CPtF13 to input that the fixed display is in a rut horizontal period.
3 outputs a new preset value, which is the data of the first line of vertical scrolling, and the new preset value of jin is supplied to the vertical counter 18#/c via the input/output port 1m. The CPU 13 that outputs the new preset tv of C is the horizontal period Kf! Direct counter 18%: It goes to 1 in the waiting state for several 10P- time like a pre-dragon set, and I! Adjust the time for finishing the presetting of the counter 18. If this waiting period is not provided, the presetting operation of the vertical counter 8 will be completed immediately and there is a risk of malfunction, so please adjust the timing. It is something that After this vertical counter 8 preset is completed,
During the next horizontal blanking period, the first preset value is output. The output of this vertical counter 8 is supplied to the dot pattern memory 9 and ROM 22, and R
In the OM22, an output pulse P- is output during the final horizontal planning period of the final display area of the memory, and the vertical counter 8v is turned on. After that, do 8 vertical counters once! Based on the data from the CPU 13 that is input every % period, the predetermined character information is sequentially shifted from bottom to top as shown in the moving display area on one side. Preset 'kvI]! If it is not updated, the screen does not move and is displayed as a fixed character information display section.

As described above, according to the present invention, the warehouse preset value is output during the final horizontal period of the t/i fixed display section, the vertical counter is preset during the final horizontal blanking period of the -foot display section, and during this final horizontal plan. KOPU outputs the first preset value during the horizontal blanking period following the blanking period.
Until now, it has been considered necessary to change the vertical counter preset value switching times by the number 10 and -. I
It can be realized with a simple circuit configuration, such as eliminating the voltage difference and also supporting switching pulses from the ROM, making it extremely advantageous in actual conversion. It has the advantage of being able to

[Brief explanation of the drawing]

FIG. 1 is a circuit configuration diagram showing a conventional character information display device, FIG. 2 is an operation waveform diagram showing waveforms of each part of the device shown in FIG. 1, and FIG. 3 is a character information display device according to the present invention. The circuit configuration diagram, FIG. 1, is an operational A-type diagram showing the waveforms of each part of the device shown in Figure 3. 1 3 --------(! P U 16.122--ROM 18--Direct counter 19--Dot pattern memory 201--Horizontal counter

Claims (1)

[Claims] 1. An IJ-only memory that detects and outputs the final horizontal period and final horizontal blanking period of the display section, and a microprocessor that notifies the final horizontal period by the output of this memory and outputs the leading preset value of the moving display section. This microprocessor output is input to a vertical counter which is preset by the final horizontal blanking period output pulse from the read-only memory, and the output of this counter is input to the next blanking period Kll' after the final horizontal blanking period. a read-only memory that generates an output that self-presets a counter, and a dot pattern memory that is controlled by said counter and a horizontal counter; A character information display device in which it is possible to preset the first -7th address of a movable display section by the next horizontal blanking period.