KR830000446B1 - Electronic typewriter with electronic display - Google Patents

Abstract

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Description

Electronic typewriter with electronic display

1 is a perspective view showing a solid type typewriter connected to a liquid crystal display panel which interacts with a copier according to the present invention.

FIG. 2 is a cross-sectional view partially cut away of the copier of FIG. 1 with a liquid crystal display. FIG.

3 shows the copier of FIG. 2 taking another operating mode with a fixed moving pedestal;

4 is a system schematic showing the operation of the device in detail.

5 is a system schematic according to the present invention.

6 shows another embodiment of an LCD screen using a single point model.

7A to 7G are drawings showing details of the formation of alphanumeric symbols using the screen of FIG.

The present invention relates to an electronic typewriter using a liquid crystal panel which interacts with a copier to make complete radiation.

In particular, the present invention relates to an electronic typewriter in which a liquid crystal plate is wound simultaneously with the sweep of the copier by using a liquid crystal display panel which interacts with the copier for complete radiation.

Word processors, typewriters with stored memory, were first popularized in the mid-1960s.

IBM has developed an MTST model with single and double tapes that can receive program information from a typewriter and correct the program before the last copy is typed. Like IBM, Remington, Reddtron and Sabine have also begun manufacturing magnetic card typewriters with single and double card capabilities. Typed information was stored in one or more magnetic cards and could be reproduced at any time by inserting the card into the card reader. This machine eliminates the burden of calibrating and reading the entire final text when a small number of texts are corrected so that the correct text can be corrected to the card.

In addition, more sophisticated word processors have been developed that use front CRT (Cathode Ray Tube) markings, such as Vydec devices. This device allows the typed information to be displayed in full video before it is copied to paper.

There is also a Xerox 1200 model consisting of a continuously fed photocopier using a number of moving parts, including applied binary information or a character generating drum moving at high speed in the serenium reproduction drum section.

The character drum operates in conjunction with the photo-optical generator to reproduce the image on the opposite side of the selenium drum, so that it can be printed after proper cleaning and heating. The image shown by this Xerox method is blurred, which is different from the present invention.

The present invention is completely electronic in character generation and therefore does not have any moving parts or noise.

The machines mentioned above must use a mechanical printing device to copy the information recorded on the printed pages. Some word processors used a high-speed press that could print about 500 words per minute, so he used a heavy reference IBM select typewriter. Newer presses have become useful by using the ink spray deposition method in an attempt to improve speed. When a large number of pages had to be played back from the stored information, the operator of the word processor had to wait long for a long time until the mechanical printer completely transferred the information from the memory disk or tape to the printed page.

In addition, the conventional word processor had to be frequently repaired or adjusted during the heavy operation of the printing press, and suffered the inconvenience of being broken. Moreover, since the mechanical printing portion of the word processor is expensive, the conventional word processor value was about $ 10,000 to $ 18,000. In particular, the typewriter ribbon value of the mechanical processor took about $ 200 to $ 500 per year, but this was also eliminated by the present invention.

The present invention provides an electronic copier electrically connected to a liquid crystal display (LCD) constituting a liquid crystal material plate exposed to a reference copier such as a dry copier for reproducing alphanumeric symbols. In the present invention, the typewriter's electronic key board is used to type letters or reports. Typed letters are displayed on a screen adjacent to the typewriter or attached to the typewriter itself to allow proper correction or addition to the text before final printing. After the text has been typed, the print button on the typewriter is pressed and the complete text is seen by the copier's optical system, winding line by line across the LCD screen.

The LCD panel is connected to a memory such as a RAM or a microprocessor by a focusing adapter of a peripheral device.

By strobe each electrode on the dotmatrix of the LCD screen, an opaque image is formed on the LCD display. In order to obtain a transparent image on a zero graphic copier in which the selenium drum is used to record an image as the drum rotates, the text is moved or scanned with a moving mirror that matches the rotation of the drum. As the drum rotates it records different parts of the image in each part of this surface.

In the present invention, it is composed of an LCD screen which is originally moved or fixed to a scanning beam and is characterized by sweeping these images into a selenium drum. In order to copy the original from the board again, the technique "upward movement sun mode" is used. This is done by modifying the symbol line on the original LCD screen. The upper part of the alphanumeric symbol line on the LCD screen occurs at the bottom of the LCD model board.

In the next time period, this upper line is shifted one space to underline the LCD matrix and includes the adjacent underline of the symbol line. As the processor continues to run, a complete symbol is formed and the top line of the symbol is shifted in the next time period so that the indication disappears. This processing is done as a symbol that adds the lower adjacent portion of the symbol line by addressing the appropriate row of points in the last column, then addressing these same rows in successive columns over time periods, and addressing the appropriate row in the previous column. . This effectively shifts the points one space and adds the next line below. The copier shows a line or part of the line through a narrow gap placed on top of the radiation, creating an illusion of upward radiation.

So what happens to the text when it is scanned by a mirror or moved through the slit of a bed copier is effectively carried out on a plate connected to the copier and focused on a serenium drum. . In another word, it matches the operating ratio of the rotating selenium drum and the moving bed (LCD).

It is therefore an object of the present invention to provide an electronic typewriter using a liquid crystal panel which can make alphanumeric symbols on a photocopier.

Another object of the present invention is to provide an electronic typewriter having a liquid crystal display panel which is simple in design, easy to manufacture and reliable in operation.

Other objects and features of the present invention will become apparent from the following detailed description with reference to the drawings showing the practice of the present invention.

This figure is designed to illustrate rather than to delimit the present invention.

Like reference symbols in the various drawings indicate like elements.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 shows an electronic typewriter 10 having a keyboard of a plurality of keys 12 in a typewriter mode according to the prior art. This typewriter also includes a delete button and a repeat and home buttons. It also includes a memory circuit that stores a typed alphanumeric display so that the alphanumeric display 23 on the LCD panel 17 is wound one by one when the print button 14 is pressed. When the plate 17 is placed on the glass 21 of the photocopier 18 and the mark on the plate 17 is wound, it is radiated on the selenium barrel 26 of the machine 18 as shown in FIG. do.

Typically, the machine includes a high intensity lamp 24 which emits a symbol formed on the plate 17 when placed on the open glass 21. The machine also has a reflector 30 so that the reflected light traveling along the beam 25 is reflected on the surface of the cylinder as the cylinder rotates. The plate 17 is connected to the machine by a line 19, which is connected to the electronic typewriter 10 via a line 22. In the normal operating state, the text is placed on the moving pedestal 20 moving across the glass 21 at the same tangential speed as the surface of the drum 26 as shown in FIG.

4 shows the system operation of the present invention. When the operator presses the print key after typing a character, the copier operates and the LCD screen starts to wind the alphanumeric display from the first line to the last line of the typed text.

The image continues to form in the copier's selenium trade, and once rewound, the machine produces a complete page. 5 is an electrical diagram showing system operation. The microprocessor device 31 to which an input is input from the typewriter 10 drives a peripheral adapter (PIA) of a peripheral device interconnected to the display panel 23 for displaying alphanumeric symbols. In this system schematic, a pressure keyboard 12, which can be an input of tape and fax, is supplied to the memory circuit 33 so that data is stored at regular intervals in the memory. The microprocessor 31 changes the keyboard display from the memory to the keyboard display from dot memory to the dotmetrics compared with the algorithm 3. The microprocessor then addresses the PIA device 32 via an alphanumeric buss line 40 and the PIA device strobes the LCD display 23 to produce an alphanumeric display.

6 shows an LCD plate having only a single dot matrix 26 displayed through the screen. If necessary, more than one dotmetric column can be displayed on the screen.

As shown in Figs. 7A-7G, when the letter "T" is formed on the single dot matrix 26, the letters are formed by the darkness of the set of dot metrics 126 as shown in Fig. 7A. The upper line of the uppercase "T" is displayed for the first time. Just as a photocopier scans a single dot matrix, an image of a string protrudes from a single dot matrix onto a selenium barrel or a photosensitive surface.

In FIG. 7B, the stem of "T" is formed by a single point as the barrel scans a single dot matrix.

Since the stem size of "T" is a limited straight line, the single point is darkened on the dot metrics 26 until the complete stem of the character is wound as shown in FIG. 7G. At this point, the single dot matrix 26 disappears from the screen and the next character on the next line below the capital letter T begins to appear.

LCD dotmetric spans have a well-reflected white background to create high contrast in black and white. The person operating the device can also control the shift time of the LCD panel. This can be done by hardware control knobs or software delay loops using something like a variable potentiometer. The delay time controls the symbol length and the space width between the separated lines.

To simply copy a few copies, the operator adjusts the keyboard to vary the scanning ratio of the copier with a fixed reflector. Cutting in the rows of dotmetrics is eliminated by a second layer that is offset so that the adjacent layer lies slightly above and overlaps on the first layer. The cutting problem, which occurs opposite to the winding direction, is eliminated by having a second LCD model screen superimposed on the first screen and slightly offset by the cutting width, as described in US Patent Application No. 765,339 filed by the applicant.

In a typical dot matrix arrangement on an LCD screen, the dots have a width of about 0.5 mm in diameter and the open space is separated by 0.25 mm. The type of type can be chosen electrically so that the characters can be copied in Roman or Gothic. In particular, the size of the characters can be adjusted according to the size and space of the paper. For example, to type only short characters, the alphanumeric symbol can be doubled and tripled in size and adjusted to fit the remaining space of the character.

It is also possible to use reflective symbol displays that are different display liquid crystals. For example, selective plating, electron chromium, PIZL and LETI (silver / native electrolyte).

In addition, there are LCD and electronic chromium displays that can have multiple colors of opaque symbols produced by varying voltages or by other methods on multiple electrodes. The change in voltage is caused by the use of A / D in a switcher that shares the electrodes of the controller. Connecting the color imager to a color copier allows the operator to print in color.

LCD dotmetrics displays are manufactured by Irek Coporation, Sunnyvale, California, and Recoid Crystal Display, Inc., Ohio Cravenard.

While the invention has been shown and described with just a few implementations, those skilled in the art may make various changes and modifications without departing from the spirit or scope of the invention.

Claims (1)

A housing having an electronic keyboard having a key for each character, the housing comprising a display device for determining the position of information input by the key, a memory circuit coupled to the keyboard for storing characters in a memory, and an algorithm circuit For displaying and reproducing characters in an original scannable photocopier comprising a microprocessor that converts the characters stored in the memory into a dot matrix by comparing the characters stored in the memory circuit with the algorithm. A word processing system, comprising: a single reflective dot matrix disposed over a display screen, arranged at right angles to the scanning direction of a copying machine, and coupled to a microprocessor, such that the microprocessor is arranged so that the top line of a character is Address an appropriate row of dots to form on the screen After that, the next same row of dots on the next line is addressed, so that the uppermost part of the character is shifted by one space so that the adjacent lower part of the character line is displayed on the screen, and as a result, the character stored after a plurality of addressing cycles At least one reflective solid display piece, the symbol being converted into a sequence of dot matrix characters and registered in the same direction and in the same direction as the scanning speed of the copier, so as to be displayed on the screen. With electronic typewriter.

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