JPS6159265A - Liquid crystal display apparatus for displaying figure - Google Patents

Abstract

PURPOSE:To read the size or the like of a displayed figure with good accuracy, by providing a vertical graduation line to the meter board of a display surface and, with respect to a traverse graduation line, outputting a traverse line signal at every difine number of lines by counting the number of scanning lines by a counter to display the same on the display surface. CONSTITUTION:A vertical graduation line is provided to the meter board of a display part 3. At the display time of a figure, the output of a figure display signal generation circuit 4, that is, a figure display signal is applied to the display electrode of the display part 3 through an OR circuit 6 and, at the same time, the scanning of the scanning electrode of the display part 3 is performed to display a figure on the display part 3. In this case, the number of scanning lines is counted by a counter 5 and a traverse line signal is outputted at every definite number of lines. This traverse line signal is applied to the display electrode of the display part 3 through the OR circuit 6. As a result, a traverse graduation line is formed and the size of a displayed figure is read on the basis of said traverse graduation line and the vertical graduation line of the meter board.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a graphic display liquid crystal display device used for displaying waveforms, etc., and particularly to improvements in its scale portion.

[Conventional technology]

A display device that displays waveforms and the like requires a scale on its display surface in order to know the size and the like. Il:1 For TV1, writing directly on the liquid crystal element surface is best in terms of $a, but l
In terms of alignment with the crystal element, li! 15! 1I, and generally has a scale plate with vertical and horizontal scale lines arranged on the front surface.

[Problem that the invention seeks to solve]

However, when the scale plate is disposed on the surface of the display surface in this way, the best points of the contrasts 1 to 1 of the liquid crystal display do not coincide with the normal direction, and especially the horizontal lines have a large variation.

Means for Solving Problem C) An object of the present invention is to provide a liquid crystal display device for displaying graphics that is capable of accurately reading the size of a graphic.

According to the above-mentioned object, the present invention provides a liquid crystal display device for displaying graphics in which a graphics display signal is applied to the display M pole and a scanning electrode is scanned to display graphics. a scale plate, a counter that counts the number of scanning lines and outputs a horizontal line signal every fixed number, and an OR that takes the output of this counter and the graphic display signal and supplies the output to the display electrode. circuit, and the horizontal scale lines are formed by an electric circuit.

[For production]

In the above configuration, when a figure is displayed, a figure display signal is applied to the display electrode of the display section through the OR circuit, and at the same time, the scan electrode of the display section is scanned, and the figure is displayed on the display section. At this time, the number of scanning lines is counted by a Karatan, and a horizontal line signal is output every fixed number of lines. This horizontal line signal is applied to the display electrode of the display section via an OR circuit, and horizontal scale lines are formed on the display section. The size of the displayed figure is read based on this horizontal scale line and the vertical scale line of the scale plate.

The present invention will be explained in more detail below using illustrated examples.

〔Example〕

FIGS. 1 and 2 show an embodiment of the present invention. In Fig. 1, 1 is the display main body, 2 is this main body 1
It is a scale plate arranged in front of the display surface of , and this scale plate 2
The vertical scale line is indicated by ■.

In FIG. 2, numeral 3 is a matrix-type display section using a liquid crystal display element, 4 is a graphic display signal generation circuit, and 5 is a matrix-type display section that counts the number of scanning electrodes of the display section 3 when they are scanned. A counter 6 that generates an output as a horizontal line signal takes the logical sum of the output of the counter 5 and the output of the graphic display signal generation circuit 4 (graphic display (number 0)), and applies the output to the display electrode of the display section 4. This is an OR circuit that supplies

Next, the operation will be described. At the time of graphic display, the output of the graphic display signal generation circuit 4, that is, the graphic display signal is applied to the display electrodes of the display section 3 through the OR circuit 6, and at the same time,
The scanning electrodes of the display section 3 are scanned, and a figure is displayed on the display section 3.

In this case, the number of scanning lines is counted by the counter 5, and a horizontal line signal is output every certain number of lines. This horizontal line signal is applied to the display electrodes of the display section 3 via the OR circuit 6. As a result, horizontal scale lines H are formed on the display section 3 as shown by dotted lines in FIG.

The size of the displayed figure is read based on the horizontal scale line H and the vertical scale line V of the scale plate 2. This reading is highly accurate because the horizontal lines are the appearance of scanning lines on the display surface.

The scale plate 2 also serves as a protection plate for the polarizing film of the liquid crystal element.

〔Effect of the invention〕

As described above, according to the present invention, vertical scale lines are provided on the scale plate disposed in front of the display surface, and horizontal scales v11[! The number of scanning lines is counted by a counter and a horizontal line signal is output every certain number of lines, and this signal is applied to the display electrodes so that it is displayed on the display screen. is now formed on the display surface, and the size of the displayed figure can be read with high accuracy.

[Brief explanation of drawings]

FIG. 1 is a front view (not showing an embodiment) of an I-crystal display device for graphic display according to the present invention, and FIG. 2 is a block diagram of a horizontal scale line forming circuit of the same embodiment. DESCRIPTION OF SYMBOLS 1...Display main body, 2...Scale plate, 3...Display section, 4...Graphic display signal generation circuit, 5...Counter, 6...OR circuit, H...horizontal The scale line, ■...
・Vertical scale lines. Patent applicant Soar Co., Ltd. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] In a graphic display liquid crystal display device that displays a graphic by applying a graphic display signal to the display electrodes and scanning the scanning electrodes, a scale plate provided with vertical scale lines and arranged in front of the display surface and the number of scanning lines are used. A graphical display comprising: a counter that counts and outputs a horizontal line signal every fixed number of lines; and an OR circuit that takes the logical sum of the output of this counter and a graphical display signal and supplies the output to a display electrode. liquid crystal display device.