JPH041368B2 - - Google Patents

Description

[Detailed description of the invention]

[Technical Field of the Invention] The present invention relates to a keyboard display device that can identify the shift state or operation mode of a keyboard by displaying a background color. [Technical background of the invention and its problems] Keyboard display devices have come to be frequently used as data input/output means for information processing systems. The keyboard unit that constitutes this keyboard display device should be able to input as many types of data as possible (alphanumeric, kana, English symbols, kana symbols, kanji, graphics, etc.) using the minimum necessary data input switches (key switches). Multi-stage shift input is generally adopted for this purpose. By the way, in this keyboard display device, in order to make the operator aware of which shift state the data currently being input is in, the data input switch itself is provided with an indicator light indicating the shift state, or the data input device is provided with an indicator light. The operator was notified. Also, means are provided for displaying the shift state in letters or symbols at a designated position on the display screen, or for changing the shape of the cursor in accordance with the shift state. Furthermore, a means similar to the shift state display described above is also provided for making the operator aware of the operating mode of the information processing system. However, in any of the above cases, in order for the operator to recognize the status display, it is necessary to concentrate and observe the indicator lights, display characters, cursor shape, etc., which places a heavy burden on the operator. [Object of the Invention] The present invention has been made in view of the above-mentioned drawbacks, and provides a keyboard display device that reduces the burden on the operator by having a configuration in which the shift state is recognized by background color display or gradation display. The purpose is to [Summary of the Invention] The present invention provides a keyboard display device capable of multi-stage shift input, which includes a flip-flop for specifying the shift state of the keyboard unit as a color display of a scanning line outside the effective display screen of the display unit, and a flip-flop that specifies the shift state of the keyboard unit as a color display of a scanning line outside the effective display screen of the display unit. The shift state is recognized by displaying the background color by discriminating the signal and turning the flip-flop ON/OFF, and by supplying the video signal to the display unit by the gate output and the inverted output of the video signal. This makes it possible to reduce the operator's attention and concentration, thereby reducing the burden on the operator. [Embodiment of the Invention] FIG. 1 is a block diagram showing an embodiment of the present invention. In the figure, 11 is a keyboard unit that realizes multi-stage shifting, and 12 is a processor unit, which controls data input and data display in general. Particularly related to the present invention, as will be described later, data input from the keyboard unit 11 (including shifts) is recognized and a background color designation flip-flop 16 is set. 13 is a refresh memory. In the refresh memory 13
Character data to be displayed on the CRT monitor 20 is stored as a code. Refresh memory 13 is connected to character generator 14 . The character generator 14 is connected to the above-mentioned refresh memory 13.
The display code obtained from is converted into a dot pattern and supplied to shift registers 15R, 15G, and 15B. Shift register 15R, 15G, 15B
are provided corresponding to the three display primary color signals, respectively.
It has a function of converting the parallel dot output obtained from the character generator 14 into serial dots. Reference numerals 16R, 16G, and 16B are flip-flops for specifying background colors. The background color refers to the color of the scanning line outside the effective display screen range, as shown by diagonal lines in FIG.
This background color color specification flip-flop 16R, 16
G and 16B are provided to display the shift status of the keyboard unit 11 as a background color display, and are set by the processor unit 12. That is, the processor unit 12 determines the shift state of the keyboard unit 11, determines the background color according to the correspondence table shown below, and sets one of the flip-flops 16R, 16G, and 16B.

〔Effect of the invention〕

As described above, according to the present invention, the shift status of a data input device that performs multi-stage shifting or the operation mode recognition of an information processing system is realized by color display or monochrome gradation display, thereby displaying the status intuitively. be able to. Therefore, the cost and the burden on the operator can be significantly reduced compared to the case where multiple shift status displays or operation mode indicator lamps are provided on the data input device for recognition. Furthermore, the burden on the operator can be significantly reduced compared to cases in which the shift state or operation mode is displayed in letters or symbols on the display screen or by changing the shape of the cursor.

[Brief explanation of drawings]

Figure 1 is a block diagram showing an embodiment of the present invention, and Figure 2 is a background color display according to the present invention.
FIG. 3 is a diagram showing display positions on a CRT display screen. 11... Keyboard unit, 12... Processor unit, 13... Refresh memory, 1
4... Character generator, 15... Shift register, 16... Background color color display flip-flop, 17... Inverter, 18... AND gate, 19... OR gate, 20... CRT monitor.

Claims (1)

[Claims] 1. In a raster scan type keyboard display device capable of multi-stage shift input, a plurality of background color specification flip-flops are used to indicate the shift state of the keyboard as a color display of scanning lines outside the effective display screen, and a flip-flop that receives data input from the keyboard. a processor unit that determines a shift state and instructs a corresponding background color by setting at least one of the plurality of flip-flops; an inverted output of a video signal which is a video conversion output of data to be displayed; It consists of a plurality of first gates that take an AND with a flip-flop that specifies the background color, and a second gate that takes an OR between the output of the first gate and the video signal and supplies the output to the display unit. A keyboard display device characterized by: