JPH01295171A - Waveform display device - 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 (Field of Industrial Application) The present invention relates to a waveform display device, and more particularly to recording of displayed images.

(Prior Art) One type of waveform display device is one that is configured so that a displayed image can be recorded on recording paper using a printer, plotter, or the like.

FIG. 3 is a block diagram showing an example of such a conventional device. In Fig. 3, 1 is digital waveform data S
This is a waveform memory that stores D.

Digital waveform data SO stored in this waveform memory 1
is output as image data Sv to, for example, a rask scan type CRT 3 for display via the display control circuit 2, and is output as recording data sR to the recording device 5 via the recording control circuit 4 to be recorded.

By the way, in such a configuration, when recording the waveform data read from the waveform memory 1 with the recording device 5, in order to obtain stable recording results, the recording device 5
During the period from a few seconds to several tens of seconds when one screen is being recorded, the digital waveform data SD stored in the waveform memory 1 is
Is it necessary to stop updates? That is, during this period, the waveform displayed on the CRT 3 also stands still.

(Problems to be Solved by the Invention) However, according to such a conventional configuration, fluctuations in the waveform during the recording operation cannot be observed, and only continuous observation of the waveform can be performed.

The present invention has focused on these points, and its purpose is to provide a waveform display device that can record a display image at any time desired by an operator while continuously observing waveforms. .

(Means for Solving the Problems) A waveform display device of the present invention includes: a waveform memory that stores waveform data to be displayed on a display section; and a frame memory that stores image data to be output to the display section. It is characterized by

(Example) Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention, and the same parts as in FIG. 3 are given the same reference numerals. 6 In FIG. A serial/parallel converter 7 converts the image data Sv into parallel image data SV-, and a frame memory 7 stores the parallel image data SV- output from the serial/parallel converter 6.

The operation of the device configured in this way will be explained.

The waveform data SD stored in the waveform memory 1 is sequentially read out to the display control circuit 2 for each display frame according to the readout control signal SC1 applied from the display control circuit 2, and converted into serial type image data Sv. This image data S
V is applied to the CRT 3 to display the waveform, and is applied to the serial/parallel converter 6 to generate parallel image data Sv.
− is converted to

That is, the serial/parallel converter 6 performs serial/parallel conversion in accordance with the timing signal S02 applied from the display control circuit 2 in response to the operator's recording start instruction operation. Parallel type image data Sv- output from this serial/parallel converter 6
is stored in the frame memory 7 in accordance with the write control signal SC3 applied from the display control circuit 2 in response to the operator's recording start instruction operation. Here, the frame memory 7 stores image data SV- for one display screen during one frame period, for example. CRT3 display resolution 25
Assuming 6 dots x 256 dots, (256 x 256
)/8 = 8K (bytes) of image data S for one display screen
v- can be stored.

The image data SV once stored in the frame memory 7 in this way is read out by the readout control signal SC applied from the recording control circuit 4 in response to the operator's recording start instruction operation.
4, the data is read out as recording data sR at a predetermined speed suitable for the recording device 5 and recorded on recording paper.

Furthermore, not only the measurement waveform but also a plurality of display information such as characters and scale grids output from another image generation circuit can be recorded all at once, if necessary. Figure 2 shows
FIG. 3 is a diagram illustrating a specific example of such a circuit. That is, each display information SV+ to SV3 is applied to the CRT 3 via the OR gate 8, and the corresponding selection signal Sl+
It is added to the AND gates 91 to 93 that are opened and closed by S13. And each of these AND gates 9, ~9
The output signal of No. 3 is applied to the serial/parallel converter 6 via an OR gate 10. By configuring like this,
A plurality of pieces of display information can be selectively stored and recorded in the frame memory 7.

With this configuration, the image data Sv generated for waveform display is stored in the frame memory dedicated to the recording device and then recorded, so even if the recording operation is in progress, it will not affect the recording operation. The waveform data stored in the waveform memory 1 can be updated, and the waveform can be continuously observed on the CRT 3. Continuously changing waveforms can be recorded in a snapshot manner, and there is no need to freeze the displayed image on the CRT 3 each time it is recorded, as is the case in the past.

Note that the recording device 5 may be built into a part of the waveform display device, or may be connected to the outside. In the latter case, R3232C is used in the recording control circuit 4.
, GPIB, or other general-purpose interface circuits.

Further, when the display on the CRT 3 is a gradation display or a color display, the frame memory 7 stores a multi-bit digital signal before being D/A converted. In this case, direct/
The number of parallel converters 6 and frame memories 7 increases by the number of pits.

Furthermore, the storage capacity of the frame memory 7 is not limited to one screen, but may be provided for a plurality of screens. By providing multiple screens, continuous recording becomes possible.

Further, recording results for a plurality of sheets may be obtained from the same storage content stored in the frame memory 7.

Furthermore, the display device is not limited to CRT, for example, L
A large number of display elements such as ED, LCD, F, and L may be arranged two-dimensionally.

(Effects of the Invention) As explained above, according to the present invention, it is possible to realize a waveform display device that can record display images at any time desired by the operator while constantly observing waveforms continuously, and is suitable for practical use. The effect is great.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, FIG. 2 is a block diagram showing another embodiment of the invention, and FIG. 3 is a block diagram of a conventional waveform display device. 1... Waveform memory, 2... Display control circuit, 3...
CRT, 5... Recording device, 6... Serial/parallel converter,
7...Frame memory, 8.10...Or gate,
9...And Gate 6 Agent Patent Attorney Shinsuke Ozawa

Claims (1)

[Scope of Claims] A waveform display device comprising: a waveform memory that stores waveform data to be displayed on a display section; and a frame memory that stores image data that is output to the display section.