JPH0744122A - Liquid crystal display device having still image storage memory - Google Patents

Abstract

(57) [Summary] [Purpose] A screen based on the signal output from the input device,
The still image based on the signal stored in the storage means is switched to the display means and displayed. [Structure] A segment driver 2 and a common driver 3 which respond to an input device 1 for inputting a signal to be displayed and convert the input signal into a display drive signal are provided. A still image storage memory 5 for storing signals input from the input device 1 is provided, and the control circuit 6 controls switching of signals output from the input device 1 and the still image storage memory 5. The liquid crystal display device 4 displays a screen according to the output signal from the control circuit 6. The screen displayed by the signal output from the input device 1 and the still image displayed by the signal stored in the still image storage memory 5 are switched and displayed on the liquid crystal display device 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device used in personal computers, Japanese word processors and the like.

[0002]

2. Description of the Related Art Conventionally, when performing work in comparison with another screen or referring to another screen, there is almost no function of storing the screen in the device itself, and a necessary screen is left. (1) Only the necessary parts are written and left (2) Hard copies are made to a printer, etc., but in the case of (1), it takes time to write / cannot record accurately / write If you need equipment (preparation required) (2), the device you are using must have the function of hard copy (even if you have it, depending on the software used on the computer It is not easy because there are problems such as the need for a printing device such as a printer.

FIG. 3 is a block diagram showing the structure of a conventional liquid crystal display device. In the conventional liquid crystal display device, a digital signal as a signal to be displayed, which is a signal from the computer main body, is input from the input device 21. A segment driver 22 and a common driver 23 which respond to the input device 21 and convert a digital input signal into a display drive signal are provided. These drivers 2
The liquid crystal display device (LCD) 24 is driven by the display devices 2 and 23.

[0004]

Among the conventional methods, even if the processing device itself has a hard copy function, a printing device such as a printer is not connected. If the screen is in color display / multi-gradation display, it may not be possible to print faithfully on the screen because it is insufficient.-The hard copy function of the processor may not work depending on the specific software. Yes, printing is not possible in this case.-Depending on the printing speed / printing method of the printing device, it generally takes several tens of seconds to several times to print the screen, and it is not ready to use when needed. In the case of writing, ・ Writing tools are needed at hand ・ It is virtually impossible to accurately transfer the whole thing displayed on the screen ・ It takes time and effort to transfer the screen Or・ There is a problem that color display / gradation display cannot be transcribed, and it is impossible to do it immediately when necessary. In reality, either relying on ambiguous memory or redisplaying the screen you want to see. is there.

The present invention has been made in view of the above circumstances. In contrast to these conventional methods, the LCD of the present invention is provided with a memory for storing a still image, and reproduction / display is performed by itself. It is an object of the present invention to provide a liquid crystal display device to be operated.

[0006]

According to a first aspect of the present invention, input means for inputting a signal to be displayed and display drive means for responding to the input means and converting the input signal into a display drive signal. Storage means for storing the input signal in response to the input means, control means for switching and controlling signals output from the input means and the storage means, and the output signal for responding to the control means. And a display means for displaying a screen according to a signal output from the input means and a still image based on a signal stored in the storage means are displayed by switching to the display means. And a liquid crystal display device having a still image storage memory.

According to a third aspect of the invention, input means for inputting a signal to be displayed, and display drive means for responding to the input means and converting the input signal into a display drive signal,
A plurality of storage units that store the input signal having a storage capacity for a plurality of displayed screens in response to the input unit;
The input means comprises a control means for selecting and controlling switching of signals output from the input means and the plurality of storage means, and a display means for responding to the control means and displaying a screen according to the output signal. A still image characterized by displaying a screen displayed by a signal output from the means and one screen selected from a plurality of still images generated by the signals stored in the plurality of storage means by switching to the display means. A liquid crystal display device having a storage memory.

[0008]

According to the present invention, when a computer device (OA device) such as a personal computer / word processor is used for work, important screens can be viewed later or screens currently displayed can be compared. I often want to do it.

Therefore, the LC which is the display device
By providing D itself with a memory for storing the display screen, the storage / playback display of the computer screen can be realized without imposing a load on the main body of the computer device (OA device).

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings. The present invention is not limited to this.

FIG. 1 is a block diagram showing the configuration of a liquid crystal display device according to the first embodiment of the present invention. In the liquid crystal display device of the present invention, a digital signal as a signal to be displayed, which is a signal from the computer main body, is input from the input device 1. A segment driver 2 and a common driver 3 which respond to the input device 1 and convert a digital input signal into a display drive signal are provided. The liquid crystal display device 4 is driven for display by these drivers 2 and 3.

Here, a still image storage memory 5 that responds to the input device 1 and stores an input signal is provided. Further, a control circuit 6 for switching and controlling signals output from the input device 1 and the still image storage memory 5 is connected. The liquid crystal display device 4 responds to the control circuit 6 and displays a screen based on the output signal.

According to the present invention, the control circuit 6 switches and displays the screen by the signal input from the input device 1 and the still image by the signal stored in the still image storage memory 5 on the liquid crystal display device 4. You can

In the conventional LCD, the digital input signal is directly connected to the display driver to display the LCD as shown in FIG. 3, but the LCD of the present invention outputs the digital signal between the digital input signal and the display driver. An input signal can be stored by adding a still image storage memory 5 that can be stored as shown in FIG.

Further, by inputting either the input signal or the still image storage memory output to the driver, it is possible to display either the screen currently displayed by the computer apparatus main body or the screen stored in the memory. it can.

As described above, the LCD has a built-in memory for still image storage. In addition to this, (a) an instruction to capture an image (write to the memory for still image storage) (switch 7) (b) ) It has a function of switching the display signal (switching the input signal from the computer main body or the output from the memory for still image storage) (selection of switches 8 and 9), and LC
These instructions / operations (instructions / operations to the control circuit 6) are performed by D alone. As a result, it can be used as an intelligent LCD device 4 that does not depend on the computer device body.

In the case of storing a screen as digital information, the still image storage memory has, for example, 640 (width) ×
It is sufficient to display 480 (vertical) dots, display 64,000 colors per dot (or display 64,000 gradations), and have a memory of about 600 KB.

As described above, having one screen of the still image storage memory can satisfy general needs.

FIG. 2 is a block diagram showing the structure of the liquid crystal display device according to the second embodiment of the present invention. The liquid crystal display device of the present invention is a signal from the computer device main body,
A digital signal as a signal to be displayed is input from the input device 1. A segment driver 2 and a common driver 3 which respond to the input device 1 and convert a digital input signal into a display drive signal are provided. The display drive of the liquid crystal display device 4 is performed by these drivers 2 and 3 as in the first embodiment.

Here, there are provided a plurality of still image storage memories 10, 11 and 12 which respond to the input device 1 and store the input signals. Further, a control circuit 13 for switching and controlling the signals output from the input device 1 and the plurality of still image storage memories 10, 11, 12 is connected. The liquid crystal display device 4 responds to the control circuit 13 and displays a screen based on the output signal.

According to the present invention, a screen according to a signal input from the input device 1 and a plurality of still image storage memories 10 and 1 are provided.
The control circuit 13 can switch and display the still image based on the signals stored in 1 and 12 on the liquid crystal display device 4.

In this way, a plurality of memories 10, 11, 12 are provided.
By storing the same in a plurality of still images, it is possible to store and reproduce a plurality of still images, which can be used when there are a plurality of screens to be stored and left.

The configuration in this case is as shown in FIG.
The functions of D are: (a) Image capture (write to memory for still image storage) instruction (memory number to be stored can be specified (selection of switches 14, 15, 16)) (b) Display signal Switching (switching the input signal from the computer device or the output from the still image storage memory (memory number can be specified) (switches 17, 1
It is assumed that the LCD has a function of (selection of 8, 19, 20)) and performs these instructions / operations (instructions / operations to the control circuit 13) by the LCD alone.

The present invention described above can be applied to a device using an LCD of the following models.

-General information processing equipment using computer functions (office computers, workstations, personal computers) -Terminal equipment of host computer-POS, handy terminal-Word processor-CAD terminal

[0026]

According to the present invention, by providing the LCD of the present invention with a memory for storing a still image and performing reproduction display by itself, the same image as the displayed image is required. Memory / semiconductor display can be displayed at any time.-Memory / semiconductor can be used to realize processing by hardware, so memory / semiconductor display can be instantly performed.-Special device for storing display in computer device body. Is not required (the screen can be stored / played back and displayed only on the display device) ・ The number of screens that you want to keep (can be stored) can be easily increased by simply adding memory for storage.・ Effects such as storage / playback display of the surface can be expected without depending on the computer device itself and the software used.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a liquid crystal display device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a liquid crystal display device according to a second embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a liquid crystal display device in a conventional liquid crystal display device.

[Explanation of symbols]

 1 Input Device 2 Segment Driver 3 Common Driver 4 Liquid Crystal Display Device 5 Still Image Storage Memory 6 Control Circuit

Claims (3)

[Claims] 1. Input means for inputting a signal to be displayed, display drive means for responding to the input means and converting the input signal into a display drive signal, and responsive to the input means for storing the input signal The input means and the storage means, and a control means for switching and controlling the signals output from the input means and the storage means; and a display means that responds to the control means and displays a screen according to the output signal. A liquid crystal display device having a still image storage memory, characterized in that a screen based on a signal output from the means and a still image based on the signal stored in the storage means are switched and displayed on the display means. 2. A liquid crystal display device having a still image storage memory according to claim 1, wherein said storage means has a storage capacity for one screen of said display means. 3. Input means for inputting a signal to be displayed, display drive means for responding to the input means and converting the input signal into a display drive signal, and a plurality of screens displayed in response to the input means. A plurality of storage means for storing the input signal having a storage capacity of one minute, a control means for selecting and controlling the signals output from the input means and the plurality of storage means, and responding to the control means. A display means for displaying a screen based on the output signal, and a single screen selected from a screen based on the signal output from the input means and a plurality of still images based on the signals stored in the plurality of storage means. A liquid crystal display device having a still image storage memory, wherein a screen is switched to the display means for display.