JPH02273788A - Picture storage device - Google Patents

Abstract

PURPOSE:To save the handling time for transferring picture data at the time of picture printing and to eliminate waste such as storing the same data in both devices by using a frame memory circuit storing picture data for screen display also as a frame memory circuit storing picture data for the picture printing. CONSTITUTION:The picture data 112 written into the frame memory circuit 101 by a picture data inputting circuit 102, is read out by a video signal outputting circuit 103, and is converted into a video signal 106, which is outputted to a screen display device. Thus, the handling time for transferring the picture data 112 from a storing device for the screen display to a storing device for the picture printing at the time of the picture printing is saved, and waste such as storing the same data in both devices can be eliminated.

Description

[Detailed description of the invention] [Industrial application field]

The present invention provides image data for screen display and image printing.

[Conventional technology]

In the conventional image storage device, as shown in FIG. 3, there is an image storage device 301 for screen display, which is composed of an image data input circuit 303, a frame memory circuit 304 for screen display data, and a video signal output circuit 305, and an image storage device 301 for image print data. The image storage device 307 for image printing consisting of a frame memory circuit 308 and a print data output circuit 309 is independent, and the frame memory circuit 304 for screen display data when printing an image
The configuration was such that data is transferred from the image printing data frame memory circuit 308 to the image print data frame memory circuit 308.

SUMMARY OF THE INVENTION However, in the prior art described above, when an image is printed, the screen display data frame memory circuit in the screen display image storage device is transferred from the image printing data frame in the image printing image storage device. There are problems in that the image data must be transferred to the memory circuit, which takes time and effort, and that there is waste in storing similar data in both devices. SUMMARY OF THE INVENTION The present invention is intended to solve these problems, and its purpose is to transfer the data from the frame memory circuit for screen display data in the image storage device for screen display to the image print data in the image storage device for image printing when printing an image. The object is to realize a device configuration that eliminates the trouble of transferring image data to a data frame memory circuit and eliminates the waste of storing similar data in both devices.

[Means to solve the problem]

An image storage device of the present invention stores image data for screen display and image printing, and includes a frame memory circuit that stores image data, and an image data input circuit that writes image data to the frame memory circuit. , a video signal output circuit that reads image data from the frame memory circuit and outputs a video signal; and a print data output circuit that reads image data from the frame memory circuit and outputs image data for printing.

[Operation] According to the above configuration of the present invention, the image data written to the frame memory circuit by the image data input circuit is
The image signal is read out by the video signal output circuit, converted into a video signal, and outputted to the screen display device, and also read out by the print data output circuit and outputted to the image printing device.

【Example】

FIG. 1 is a block diagram showing an image storage device according to an embodiment of the present invention, in which reference numeral 101 denotes a frame memory circuit for storing image data for screen display and image printing;
02 is an image data input circuit that writes image data into the frame memory circuit 101, and 103 is a frame memory circuit 1.
The image data 114 is read from 01 and the video signal 106 is output, and the video vertical synchronization signal 108 and the video horizontal synchronization signal 1 are output.
104 is a print data output circuit that reads image data 113 from the frame memory circuit 101 and outputs print data 107 and an input control signal 111. FIG. 2 shows the operation of FIG. 1 in the form of a time chart. The print data output circuit 104 outputs a print start signal 1.
10 is input, reading of image data 113 and output of print data 107 are started in synchronization with the next video vertical synchronizing signal 108, and at the same time, input control signal 111 is set to high level. Thereafter, the print data output circuit 104 reads out one block of image data from the frame memory circuit 101 within one vertical blanking period in synchronization with the video vertical synchronization signal 108 and outputs the print data 107, thereby generating print data for one screen. When the output is finished, the input control signal 111 is set to low level. Here, the print data output circuit 104 outputs image data 1.
13 is divided into n blocks and read out. The value of n is determined according to the number of data that can be read out within one vertical blanking period.
When the input control signal 111 is at a low level, the input data 1 is synchronized with the video vertical synchronization signal 108 within the vertical blanking period.
05 is written into the frame memory circuit 101 as image data. When the input control signal 111 is at a high level, image data cannot be written. As a result, new writing is performed on the frame memory circuit 101 before printing data for one screen has been outputted.
It is possible to prevent the image data stored in the image data from changing. Further, by writing image data by the image data input circuit 102 and reading image data by the print data output circuit 104 every vertical blanking period, the video signal output from the video signal output circuit 103 is prevented from being disturbed. be able to. Note that this embodiment is just an example, and the signal level of the input control signal may be inverted, and the video signal output from the video signal output circuit is a composite video signal in which the synchronization signal is not separated. Alternatively, a function may be provided to stop the video signal output and continuously output print data.

【Effect of the invention】

As described above, according to the present invention, the frame memory circuit that stores the image data for screen display and the frame memory circuit that stores the image data for image printing are shared. This eliminates the trouble of transferring image data from the frame memory circuit for screen display data in the image storage device for image printing to the frame memory circuit for image printing data in the image storage device for image printing, and allows ``same data to be stored in both devices.'' This has the effect of eliminating waste.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the image storage device of the present invention. FIG. 2 is a time chart showing the operation of an embodiment of the image storage device of the present invention. FIG. 3 is a block diagram showing a conventional image storage device. 101...Frame memory circuit 102...Image data input circuit 103...Video signal output circuit 104...Print data output circuit 105...Input data 106...Video signal 107...Print data 108... ...Video vertical synchronization signal 109...Video horizontal synchronization signal 110...Printing start signal 111...Input control signal 112...Image data written by image data input circuit 102...Printing data output circuit Image data 114 read out by the video signal output circuit 103... Image data 301 read out by the video signal output circuit 103... Image storage device for screen display 302... Input data 303... 304... Circuit 305... 306... 307 308... Circuit 309... 310... Image data input circuit/Frame memory for screen display data Video signal output circuit Video signal Image storage device for image printing Frame memory for image print data/Print data output circuit/Print data Applicant: Seiko Epson Co., Ltd. Representative Patent Attorney Kizobe Suzuki (and 1 other person) +115 Figure 1 Figure 2

Claims (1)

[Scope of Claims] An image storage device that stores image data for screen display and image printing, comprising: a frame memory circuit that stores image data; an image data input circuit that writes image data to the frame memory circuit; An image storage device comprising: a video signal output circuit that reads image data from a frame memory circuit and outputs a video signal; and a print data output circuit that reads image data from the frame memory circuit and outputs image data for printing.