JPH01213521A - Recording meter - Google Patents

Abstract

PURPOSE:To improve the resolution of a bar-graph display with a simple constitution by controlling each line of a matrix type display device for displaying each digit in a prescribed state. CONSTITUTION:On a display element of a matrix array of five lines l1-l5, each display device D1-D5, which is separated from each other by a separating distance (d) which is (n) times as wide as the line pitch (p) (d=p, if n=1) and displays of five digits, are performed in accordance with measured values. When a bar-graph display is performed by setting the lines l3 of the devices D1-D5 to non-lighting states and respectively setting the lines l1 and l2 and l4 and l5 of the device D1-D5 in lighting and non-lighting states, a high- resolution bar-graph display is realized with a simple constitution which does not require any separately provided device for bar-graph display. The resolution of this bar-graph display is twice as high as the bar-graph display which is performed by controlling the lighting and non-lighting of the lines l1-l5 at once.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a recorder, and more particularly, to a recorder having a multi-digit display device in which a plurality of matrix type display elements are arranged in a row. This relates to driving a display device.

(Prior Art) A type of recorder is equipped with a digital multi-digit display device consisting of a plurality of matrix-type display elements arranged in a row in order to digitally display measurement conditions and the magnitude of measured values. There is something.

By the way, in order to intuitively grasp the magnitude of a measured value, it is desirable that the magnitude of the measured value be displayed in the form of a bar graph.

For example, when using a fluorescent display tube with a 20-digit display as a digital multi-digit display device, 20 matrix-type display elements are arranged in units of 20 matrix-type display elements according to the magnitude of the measured value, as shown in Figure 5. It is conceivable to display the magnitude of the measured value as a bar graph by selectively driving the sensor.

However, when focusing on the resolution in the case of such a bar graph display, since the number of matrix type display elements that can be selectively driven is 20, it becomes 5%, and sufficient resolution cannot be obtained.

Therefore, in addition to the digital multi-digit display device, conventional recorders are provided with a dedicated bar graph display device to display the magnitude of the measured value as a bar graph, if necessary.

(Problems to be Solved by the Invention) However, providing the digital display device and the bar graph display device separately in this way is not economical in terms of space and cost. A circuit must be provided, and the circuit configuration becomes complicated.

The present invention has focused on these points, and its purpose is to provide a recorder that can display bar graphs with relatively high resolution using a multi-digit digital display device in which a plurality of matrix type display elements are arranged in rows. The aim is to provide a meter.

(Means for Solving the Problems) The recorder of the present invention has a multi-digit display device in which a plurality of matrix display elements are arranged in a row. A multi-digit display device is arranged such that the spacing between the display elements is such that the arrangement pitch of each display matrix (n1ln includes 1), and the display elements of each matrix-type display element constituting this multi-digit display device are The present invention is characterized by comprising: a display drive section that selectively drives along the direction according to the magnitude of the measurement signal and displays the magnitude of the measurement signal as a bar graph.

<Example) Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a configuration explanatory diagram showing a specific example of a matrix type display element used in the present invention, and includes anodes AO to A34 forming 35 display elements of 5 x 7, and common to these anodes A and A34. It consists of one grid G. In an actual multi-digit display device, for example, in the case of a 20-digit display device, 20 matrix type display elements are arranged in a row, and the grid of each matrix type display element is pulled out to the outside so that it can be driven individually. , the anodes AO to A34 at the same position are connected in parallel to each other. Then, the display elements are selectively turned on or off depending on the combination of driving these anodes and grids.

FIG. 2 is a block diagram showing a specific example of a drive circuit for a multi-digit display device used in the present invention. In FIG. 2, 1 is an arithmetic control unit (CPU), and from this arithmetic control unit 1 an anode shift register 2 and a grid shift register 3.
Serial data is added to each. Each of these shift registers 2 and 3 converts serial data applied from the arithmetic control section 1 into parallel data. The parallel data converted by the anode shift register 2 is applied to the anode of the fluorescent display tube 6 via the latch 4 and the anode driver 5, and the parallel data converted by the grid shift register 3 is applied to the anode of the fluorescent display tube 6 via the grid driver 7. It is added to the grid of the fluorescent display tube 6.

As a result, the display elements of each digit of the fluorescent display tube 6 are selectively turned on or off depending on the combination of driving the anode and the grid, as described above.

FIG. 3 is a configuration explanatory diagram showing an example of the arrangement relationship of display elements of each digit of a multi-digit display device used in the present invention. Third
In the figure, each matrix type display element is arranged such that the distance d between adjacent matrix type display elements is equal to the arrangement pitch p of each display matrix.

When displaying a bar graph using a multi-digit display device configured in this way, for example, as shown in FIG.
2 lines on both sides ε1. Q2 and Q
A and R5 are selectively driven to turn on as units.

As a result, each matrix type display element is substantially divided into two parts, and the resolution in bar graph display can be doubled compared to the conventional driving of each matrix type display element.

FIG. 4 is a configuration explanatory diagram showing another embodiment of the present invention. Also in FIG. 4, each matrix type display element D is arranged such that the distance d between adjacent matrix type display elements is equal to the arrangement pitch p of each display matrix. When displaying a bar graph, the even numbered rows 22, . ε4 is always turned off, and odd-numbered rows (11, i3, and 25) are selectively turned on.

As a result, each matrix type display element is substantially divided into three parts, and the resolution in bar graph display can be increased three times compared to the conventional driving of each matrix type display element.

With this configuration, a digital multi-digit display is performed using a multi-digit display device in which a plurality of matrix-type display elements are arranged in rows, and the magnitude of the measured value can be displayed in a bar with relatively high resolution. It can be displayed graphically.

In the above embodiments, a fluorescent display tube is used as the matrix type display element, but a liquid crystal.

A light emitting diode, EL, etc. may be used.

Furthermore, the distance d between adjacent matrix display elements in a multi-digit display device does not necessarily have to be equal to the arrangement pitch P of each display matrix, and may be n times the arrangement pitch depending on the number of rows of the display matrix of the matrix display element. (n includes 1).

(Effects of the Invention) As explained above, according to the present invention, a recorder is capable of displaying a bar graph with relatively high resolution using a multi-digit digital display device in which a plurality of matrix type display elements are arranged in a row. can be realized, and the practical effect is great.

[Brief explanation of the drawing]

FIG. 1 is a configuration explanatory diagram showing a specific example of a matrix type display element used in the present invention, FIG. 2 is a block diagram showing a specific example of a drive circuit of a multi-digit display device used in the present invention, and FIG. 3 is a block diagram showing a specific example of a drive circuit of a multi-digit display device used in the present invention. FIG. 4 is a configuration explanatory diagram showing an example of the arrangement relationship of display elements of each digit of a multi-digit display device used in the present invention, FIG. 4 is a configuration explanatory diagram showing another embodiment of the present invention, and FIG. FIG. 3 is an explanatory diagram of bar graph display using a digit display device. 1... Arithmetic control unit (CPU), 2... Anode shift register, 3... Grid shift register, 4...
- Latch, 5... Anode driver, 6... Matrix type display element (fluorescent display tube), 7... Grid driver. Figure 1 Figure 2 Figure 7 J 7

Claims (1)

[Claims] In a recorder having a multi-digit display device in which a plurality of matrix type display elements are arranged in a row, the distance between each matrix type display element and an adjacent matrix type display element is determined by the arrangement of each display matrix. n times the pitch (n
includes a multi-digit display device, and the display elements of each matrix type display element constituting this multi-digit display device are selectively selected along the digit direction according to the magnitude of the measurement signal. A display drive unit that is driven by a display driver and displays the magnitude of a measurement signal in a bar graph.