JPS592902B2 - Closed structure of display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a closing structure for a display device, and more particularly, the present invention relates to a closing structure for a display device, and more specifically, a closing structure for a display device in which a segmented window for displaying information such as digital or symbols is closed by a closing member to display desired characters, etc. There are 10 related to structure.

In conventional segment-shaped display devices, segments forming displayed digits or characters are constructed by changing the reflection performance of a portion of the display panel.

In such a device, there is a gap of 15 between the display segment and the display panel.
Since the degree of contrast depends on the amount of light applied to the segment, the display potential varied depending on the ambient light level. The light is therefore provided by a single light source within the device itself, effectively increasing the contrast and visibility of the display by 20 degrees as the ambient light level decreases, and effectively sharpening the display even in bright surroundings. A display device has been proposed that allows for a wide variety of displays. In this display device, each display segment consists of a hole or window in a window plate, and a flap or shutter of similar dimensions to the window 25, called a closing member, is provided adjacent to the window plate, and is driven by a magnetic drive mechanism. Tsute 2
It rotates to two separate positions to open and close the window.

Such a drive mechanism allows light from a light source at the rear of the device to pass through the segment window 30 or be blocked from the light path. Therefore, if the source is not completely blocked by the blocking plate, the contrast of the display will be reduced, and the display function may be degraded.

The present invention provides for increasing the contrast of the display by attaching a flexible shutter sheet to the occluding plate to completely block light when the function of the segment is disabled, i.e. when the occluding plate is closed; The purpose is to provide an easier-to-read display.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a front view showing a segmented display device according to the present invention. The display device 1 consists of a front plate 2 made of a transparent material colored black, a color filter 3, and a window plate 4 provided at the open end of a housing 5, as shown in FIG. Here, a long hole called a segment hole or window 4a is formed in the window plate 4.

Through these, light from a light source 6 attached at the rear passes through the color filter 3 and the front plate 2 to the outside of the device, so that the segments can be visually recognized. Note that the color of the displayed segment is determined by the color of the color filter 13. Adjacent to each segment window a drive unit 7 is placed, to which a rotatably mounted closure member is mechanically connected.

The drive unit 7 is electrically driven to move the closing member 8 into two
It can be rotated to any of two mechanically stable positions. In one of these positions, the closure member allows light from the light source 6 to pass through the segment window 4a, and in the other position it prevents the passage of light through the segment window. Segment window 4a
is a conventional figure-eight display that can display any digit from 0 to 9 by selectively rotating a set of closing members to allow light to pass through corresponding segment windows. properly placed. As shown in the display device shown in FIG. 3, a panel 9 made of a colored translucent light-diffusing material is attached to each hole in the segment window, and the color of the displayed numbers is determined by the color of the translucent panel 9. It may be configured to be determined by color.

Figures 4, 5, 6 and 7 show embodiments of the closure member 8 of the invention.

The closing member 8 of the present invention consists of a closing plate 8a, a shutter sheet 8b, and a spacer 8c smaller in size than the shutter sheet 8b. This blocking plate 8a
is opened and closed by a drive unit which will be described in detail later. Further, the shutter sheet 8b is made of a flexible material and is attached to the closing plate 8a via a spacer 8c. As shown in FIG. 5, when the closing member 8 is closed, the shutter sheet 8b acts to subtly absorb the impact of the closing member 8 against the frame 14, and also reduces the noise generated thereby. It is working to do so.
FIG. 6 shows the position of the shutter sheet 8b when the closing member 8 is in the closed position. The shaft nose seat 8b effectively blocks the passage of light from the rear-mounted light source 6 shown in FIG. 2 even if the rotatable shaft 13 is not in the correct position with respect to the frame 14. It is something that can be done. Incidentally, substantially the same effect can be obtained even if the shutter sheet 8b is directly attached to the closing plate 8a without using the spacer 8c.

FIG. 8 is a perspective view showing the drive unit 7 for driving the closure member 8 of the present invention.

The drive unit 7 is mounted on a bracket consisting of a base plate 10, on which flanges 11 and 12 are formed at right angles. The closing member 8 is rotatably mounted by a rotatable shutter shaft 13. Then, both ends thereof are inserted into the bearing holes of the flanges 11 and 12.
The closing member 8 engages a frame 14 surrounding the hole in the segment window when the corresponding segment is in a state where no display is required. The closure member 8 is mechanically connected to a magnetic element 17 consisting of a bipolar permanent magnet by a connection consisting of a perforated drive arm 15 and a drive lever 16.

The drive lever 16 has an engagement pin 18 at one of its ends, which pin 18 is arranged to be slidable within the perforated portion of the drive arm 15. The magnetic element 17 is mounted on the flange 12 so that it can be rotated by the rotor shaft 19 so that when it is rotated, the closure member 8 is rotated either into a position in which it abuts the frame 14 or in a position perpendicular to the plane of the frame 14. It is rigidly connected to the drive lever 16 so that it can be moved.

At this time, the direction of movement (rotational movement) of the closing member 8 is determined by the direction of rotation of the magnetic element 17. An electromagnet consisting of a core 20 and an electromagnetic coil 21 is attached to the substrate 10 or a flange attached thereto. The flat surface of the core 20, which becomes magnetically polarized when current is passed through the electromagnetic coil 21, causes the rotation of the magnetic element 17 by magnetic attraction or repulsion when the core 20 becomes polarized. placed in close proximity to the magnetic element to generate a magnetic field. The direction of rotation of the magnetic element 17, ie the direction of movement of the closure member 8, is determined by the direction in which the current is passed through the electromagnetic coil 21. Since the closing member 8 is mechanically stable in both the raised and lowered states, the position of the closing member 8 can be changed by applying an instantaneous current pulse to the electromagnetic coil 21.

The position of the closure member 8 can be subsequently switched some time later by applying a current pulse of reflective polarity.

9A to 9C show how the movement of the magnetic element 17 is transmitted by the drive arm 15 and the drive lever 16 to the closure member 8 of the invention.

Figure 9A shows the closure member in a closed position such that light is prevented from passing through the corresponding segment window 4a. FIG. 9B shows a mode in which a magnetic field is applied by the core 20 shown in FIG. The polarity of the magnetic field is such that it causes the magnetic element 17 to rotate in the direction shown in Figure 9B, which is also the polarity that causes the closure member to rotate to the closed or open position. FIG. 9C shows the state of the closure member 8 after current has ceased to flow through the electromagnetic coil.

The closure member 8 has now been pivoted into a stable position, in which the corresponding segment is visible. FIG. 10 is a perspective view showing another example of the structure of the drive unit 7 and the closing member 8 of the present invention.

A pair of brackets 22 and 23 are attached to the window pane and have a pivot 24 mounted for rotation. A polarized permanent magnet 25 with a special shape or magnetic elements 26 and 27 attached to each end is then fixed in the axial direction of the shaft 24. magnetic element 26,
Since the 27 pole pieces are constructed so that their diameters can be changed, curved sections are formed on each piece of soil as shown in FIG. Two yokes 28 and 29 are attached to the shaft connecting the brackets 22 and 23, and the magnetic element 2
It has a shape that partially surrounds 6 and 27.

Electromagnetic coils 30 and 31 are attached around each yoke and are used to magnetically bias yokes 28 and 29. The closure member 8 is connected to the shaft 2 by means of arms 32 and 33.
It can be attached to 4.

Balance weights 34 and 35 are connected to the closure member 8 on the shaft 24.
It can be installed on the completely opposite side. They are provided to balance the closure member 8, thereby ensuring its mechanical stability both in the open and closed positions. A retaining spring 36 is provided to maintain the shaft 24 in the correct position.

The functionality of this example will be clearly understood with reference to FIGS. 11 and 12. FIG. 11 shows how the opposite N and S poles of magnetic elements 26 and 27 are attracted when current flows through electromagnetic coils 30 and 31 so that yokes 28 and 29 both have S polarity. It shows whether they match or repel each other. The curved shape of the magnetic element serves to increase the magnitude of the repulsion and attraction forces. FIG. 11 shows that the current flows through the electromagnetic coil 30 in a direction that rotates the closure member 8 to the closed position.
and 31 are shown. On the other hand, in FIG. 12, the current flows in the opposite direction to the electromagnetic coils 30 and 3.
This shows the case where it is carried away by 1 and 1. In this case magnetic element 2
6 is repelled by the yoke 28 due to the magnetization of its N pole,
Furthermore, the magnetic element 27 is attracted by the yoke 29 due to its south pole magnetization. The closure member 8 can be rotated from the open position to the closed position and vice versa by applying a single current pulse of the appropriate polarity to the electromagnetic coils 30 and 31. According to the present invention, it is possible to improve the light-shielding property of the closing member driven by the drive unit, reduce the impact when closing the closing member, and further prevent the generation of impact noise.

[Brief explanation of drawings]

FIG. 1 is a front view of the display device of the present invention, FIG. 2 is a vertical sectional view of FIG. 1, and FIG. 3 is a diagram similar to FIG. 2 but showing another example of the device shown in FIG. 1. , 4, 5, 6, and 7 are sectional views showing the structure of the closing member of the present invention and the manner in which the flexible shutter panel is attached to the closing member, and FIG. 8 is a part of the display device shown in FIG. 2. Figures 9A, 9B and 9C are partial views showing a method of coupling between the drive unit and the closure member, and Figure 10 is a perspective view showing another example of the drive unit and the closure member. The exemplary perspective views, FIGS. 11 and 12, are partial views showing the arrangement of the closing member of the magnetic element in the drive unit shown in FIG. 10, corresponding to the closed and opened positions, respectively. 1...Display device, 2...Front plate, 3.
...Color filter 4 ...Window board, 4
a... Segment window, 5... Housing, 6
...Light source, 7...1 Drive unit, 8
...Closing member, 8a...Closing plate, 8b
...Shutter sheet, 8c...Spacer, 9...Panel, 10...Substrate, 11, 12...Flange, 13...・・・・・・
Shutter axis, 14... Frame, 22, 23
...Bracket, 15, 32, 33...
・Arm, 16... Drive lever 17, 26,
27... Magnetic element, 18... Engagement pin, 19... Rotor shaft, 20...
・Core 1, 21, 30, 31... Electromagnetic coil,
24... shaft, 25... permanent magnet, 28
, 29... Yoke, 34, 35... Balance weight, 36... Holding spring.

Claims (1)

[Claims] 1. A window board having a plurality of segment windows for displaying selected characters, and a light source provided behind the window board;
a closing member provided corresponding to the segment window to block light from the light source, provided parallel to each of the segment windows and supported by a rotatable shaft, and adjacent to each of the plurality of segment windows; a plurality of drive units attached to the window pane and operably connected to the rotatable shaft for selectively rotating the closing member;
In the display device that displays desired characters, etc. by closing the closing member to block light from the light source, each of the closing members includes a closing plate firmly attached to the rotatable shaft; 1. A closing structure for a display device, comprising a flexible shutter sheet attached to a closing plate, the flexible shutter sheet being engaged with a frame defining the segment window. 2. A closing structure for a display device, wherein each of the closing members according to claim 1 has a spacer placed between the closing plate and the flexible shutter sheet.