JPH02226319A - Electronic instrument - Google Patents

Abstract

PURPOSE:To finely adjust the arrange a plane display device in an arbitrary angular position with easy operation by providing a driving means which drives a mobile mechanism, an indicating means which indicates the movement direction of the plane display device, and a rotation control means which controls forward/backward driving based on the movement direction indication. CONSTITUTION:A switch 21 used as the indicating means and the rotation control means functions as a forward rotation indicating switch connected to a positive voltage terminal 13; and while the switch 21 is depressed, a positive voltage is applied to a DC motor 6 and the DC motor is rotated forward. When the movement direction of a plane display device 1 as the plane display part is indicated by the indicating means, the rotation control means controls forward/backward driving of the DC motor 6 based on the movement direction indication to arrange the plane display device 1 in an arbitrary angular position. Thus, the plane display device is finely and safely arranged in an arbitrary angular position.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electronic device that processes information input from an input means, and particularly to an electronic device having a flat display.

[Conventional technology]

BACKGROUND OF THE INVENTION With recent advances in electronic technology, computer devices are becoming smaller and lighter, ranging from desktop types to portable laptop types.

This is due to the commercialization of various displays such as flat-type display devices, such as plasma displays, liquid crystal displays, and backlight-type liquid crystal displays, in place of the high-resolution CRT display devices used in conventional display devices. big.

Such a display device usually changes its position and angle depending on whether it is stored in a computer device or when it is used (see Figures 6 (a) and (b)), making it difficult for the user to visually see it. It has an adjustment mechanism to adjust it to suit the angle.

FIGS. 6(a) and 6(b) are perspective views illustrating the configuration of a flat display device, and in particular, FIG. 6(a) is a laptop-type display device, which is used face up. The image shown in FIG. 2(b) is a vertical type, and the display panel surface is pulled out for use.

However, these flat display devices are
) and (b), it is natural that it can be moved when stored, but the ease of viewing changes greatly depending on the viewing angle, so the free stop is designed to allow the operator to change the tilt to the desired angle. mechanism is often used.

[Problem to be solved by the invention]

For this reason, in conventional flat display devices, the angle setting is left to the user, resulting in problems such as (1) and (2) below.

(1) Free stop requires a force exceeding the predetermined braking force, which tends to cause wear of the movable mechanism.

(2) Normal manual operation involves moving the flat display device in the vertical direction, making it very difficult to operate and difficult to make fine adjustments.

This invention was made to solve the above-mentioned problems, and by electrically driving the movable mechanism connected to the flat display, the flat display can be precisely and safely positioned at any angle. The purpose is to obtain electronic equipment that can be placed in

[Means to solve the problem]

An electronic device according to the present invention includes a movable mechanism that moves a flat display to a desired position, and includes: a drive means for driving the movable mechanism; an instruction means for instructing a movable direction of the flat display; Rotation control means is provided for controlling forward/reverse direction driving by the drive means based on the movable direction specified by the instruction means.

Further, a detection means for detecting the amount of movement of the flat display and a stop control means for controlling the drive means to stop based on the output of the detection means may be provided.

[Effect]

In this invention, when the movable direction of the flat display is instructed by the indicating means, the rotation control means controls forward/reverse driving of the driving means based on the movable direction specified by the indicating means, and moves the flat display in any desired direction. Place it in an angular position.

Further, when the instruction means continues to indicate the movable direction, the detection means detects the amount of movement of the flat display and sends the amount of movement to the stop control means. In response to this, the stop control means forcibly stops the drive means and inhibits the rotational drive of the drive means.

[First Embodiment] FIG. 1 is a configuration diagram illustrating the configuration of an electronic device showing a first embodiment of the present invention, in which 1 is a flat display composed of a plasma panel or a liquid crystal panel, etc.; A moving shaft 3, which communicates with an engaging member provided on the support member 2, is rotatably supported by the support member 2.

Reference numeral 5 denotes a reduction gear, which is fixed to one of the moving shafts 3 and meshes with a gear 6a fixed to the shaft of a direct current motor (DC motor) 6. Reference numeral 4 denotes a support member, with which the moving shaft 3 is communicated and supports the flat display 1.

Note that the forward/reverse drive of the drive means (for example, the DC motor 6) is controlled based on the designation of the movable direction of the flat display 1, which is a flat display section, by the instruction means described later. Place it at any angle position.

FIG. 2 is a circuit diagram showing an example of a drive circuit for the DC motor 6 shown in FIG. 1, and the same components as in FIG. 1 are given the same reference numerals.

In the figure, in this embodiment, 21 and 22 are switches that also serve as one-rotation control means for the indicating means, and one of the switches 21 functions as a forward rotation indicating switch connected to the positive voltage terminal 13, and while this switch 21 is pressed, A positive voltage is applied to the DC motor 6, and the DC motor 6 rotates in the normal direction, driving the flat display 1, for example, in an upward direction.

Note that the switches 21 and 22 are provided at predetermined positions on the side of the electronic device body, and after the power is turned on, the switches 21 and 22 are
Repeats forward/reverse drive in response to the press of
It is configured so that the flat display 1 can be positioned at a desired angular position.

On the other hand, one of the switches 22 functions as a negative rotation instruction switch connected to the negative voltage terminal 14, and while this switch 22 is pressed, a negative voltage is applied to the DC motor 6, and the DC motor 6
is reversed, for example, driving the flat display 1 in a downward direction.

Next, the operation shown in FIG. 1 will be explained.

When only the switch 21 is turned on, a current flows in the forward direction to the DC motor 6, and the DC motor 6 rotates in the forward direction. If it is a laptop type, as shown in a), the display will open, or if it is a vertical type, as shown in FIG. 6(b), the display will pop out.
2 only to stop at the target angle position (varies depending on the user).

On the other hand, when the target angular position is overrun or when the flat display 1 is stored in the home position, only the switch 22 is pressed. This allows DC
Current flows through the motor 6 in the opposite direction, causing the DC motor 6 to rotate in the opposite direction, moving the flat display 1 in the returning direction via the reduction gear 5 and the moving shaft 3, and when the switch 22 stops being pressed, the DC motor 6 rotates in the opposite direction. is stopped, positioned or stowed.

In the above embodiment, the DC motor 6 is equipped with a switch 21.2.
The explanation has been made regarding the case where the rotation is controlled by applying a positive potential or a negative potential from the positive and negative reference power sources via the motor drive IC 1 as the rotation control means, as shown in FIG.
1, the forward/reverse rotation of the DC motor 6 may be controlled with one power source in the same manner as described above.

FIG. 3 is a circuit diagram showing another configuration example of the drive circuit for the DC motor 6 shown in FIG. 2, and the same components as in FIG. 2 are given the same reference numerals.

In the figure, L31. L32 is a signal input line, one of the signal input lines L31 is connected to the motor drive ICII, and the other is connected to the switch 21 and the pull-up resistor 34a.
One of the signal input lines 32 is connected to the motor drive IC 11, and the other is connected to the switch 22 and the pull-up resistor 34b.

Next, the operation will be explained.

When the switch 21 is pressed down, the potential of the signal input line L31 becomes H level, and the potential of the signal input line L32 becomes L level. As a result, motor drive IC11
Apply a forward current to the DC motor 6 to rotate the DC motor 6 in the normal direction (forward direction), and when the switch 21 stops being pressed,
The DC motor 6 stops.

On the other hand, when the switch 22 is pressed, the signal human power line L3
The potential of signal input line L32 becomes L level, and the potential of signal input line L32 becomes H level. As a result, the motor drive IC
11 applies a reverse current to the DC motor 6 to reverse the direction (reverse direction), and when the switch 21 stops being pressed, the DC motor 6 stops.

As a result, as in the case of FIG. 2, the flat display 1
can be positioned and stored at the desired angle with simple operations.

In the above embodiment, switch 21. ．． While the switch 22 is pressed, the control is simply forward/reverse rotation, and the stop position is left to the operator's discretion. If .22 continues to be pressed down, an excessive current may flow through the DC motor 6 and the circuit may be burnt out. Therefore, a detection means and a stop control means as shown in FIG. The stop timing of the DC motor 6 may be automated.

[Second Embodiment] FIG. 4 is a side view illustrating the structure of an electronic device showing a second embodiment of the present invention, and the same parts as in FIG. 1 are given the same reference numerals.

In the figure, 7.8 is a stopper, and switch 21.22
If continues to be pressed, the flat display 1 will come into contact with it.

The switches 21, 22 are made of damping material, for example.

Note that when the movable direction instruction is continued by the switches 21 and 22 serving as the instruction means, the detection means described later detects the amount of movement of the flat display 1, and sends the amount of movement to the stop control means described later. In response to this, the stop control means
The motor 6 is forcibly stopped and the rotational drive of the DC motor 6 is inhibited.

FIG. 5 is a circuit diagram showing an example of a drive circuit for the DC converter 6 shown in FIG. 4, and the same components as in FIG. 1 are given the same reference numerals.

In the figure, 25a and 25b are pull-up resistors, and the signal line 25 is
．． 24 to H level, L level, or L level. 26 is a gate circuit, an OR gate 26a
, 26b.

27 is a motor drive IC, or gates 26a, 26
The DC motor 6 is rotated forward/reversely based on the state of the output lines 33 and 34 of b.

28.29 is a resistor, and the resistance value of resistor 29 is resistor 2.
It is set higher than the resistance value of 8. In this embodiment, the resistors 28, 29, motor drive IC 27, etc. constitute the detection means, and the stop control means consists of the comparison circuit 31.

A voltage amplification circuit 30 amplifies the voltage at a node 36 indicating the potential of the determination line 35. Reference numeral 31 denotes a comparison circuit that compares the output of the voltage amplification circuit 30 with a reference potential, and if there is human force exceeding the reference potential (the flat display 1 comes into contact with the stopper 7.8 shown in FIG. 4 and the DC motor 6 When the torque of ffi suddenly increases), the current stop signal 5TOP is output to the signal input line 32 to the OR gate 26a or 26b, and the potential of the output line 33.34 is forced to L level, and the DC motor 6 is stopped. Stop rotation.

Next, the operation will be explained.

When only the switch 21 is turned on, the level of the signal line 23 becomes L level, and the level of signal line 24 becomes H level. Also, at this time, the output of the comparator circuit 31 is at L level (current stop signal 5TOP is 0FF), the level of output line 33 is at L level, and output line 3
Level 4 is H level. At this time, the motor drive IC 27 supplies a current in the forward direction to the DC motor 6, and the DC motor 6 rotates in the forward direction. Then, the torque of the DCC vine rotates the flat display 1 at a critical angle with respect to the forward direction via the reduction gear 5 and the moving shaft 3. As a result, the display is moved in the direction in which the display opens if it is a laptop type, as shown in FIG. 6(a), or in the direction in which the display pops out if it is a vertical type, as shown in FIG. 6(b).

However, as the flat display 1 rotates about the moving shaft 3 as the rotation axis, the support member 2 that supports the flat display 1 comes into contact with the stopper 7 . As a result, the torque of the DC motor 6 increases rapidly, and the current flowing through the DC motor 6 also increases rapidly. Note that since the current to be applied to the DC motor 6 is supplied from the motor drive IC 27,
When the current flowing through the CC vine increases, the current consumed by the DC motor 6 increases, and the current flowing through the determination line 35 increases. Note that resistor 28.2 connected to node 36
9, since the resistance value of the resistor 29 is greater than the resistance value of the resistor 28, most of the current flowing to the input 35 to be determined flows to the resistor 28.

Therefore, an increase in the current flowing through the DC motor 6 promotes an increase in the voltage at the node 36. This voltage is amplified by a constant factor in the voltage amplification circuit 30 and compared with a reference potential set in the comparison circuit 31. If a voltage exceeding this reference potential is input, the signal input line 32 is set to H level. (turn on current stop signal 5TOP).

As a result, the potentials of the output lines 33 and 34 both become L level, and the motor drive IC 27
The current supply to the DC motor 6 is stopped, and the signal input line 3 connected to the comparison circuit 31 is stopped.
2 becomes the L level.

On the other hand, when only the switch 22 is turned on, the level of the signal line 23 becomes H level, and the level of signal line 24 becomes L level. Also, at this time, the output of the comparator circuit 31 is at the L level (the current stop signal 5TOP is 0FF), and the level of the output line 33 is at the H level.
The level of the output line 34 becomes L level. At this time, the motor drive rc27 applies a current in the opposite direction to the DC motor 6, and the DC motor 6 rotates in the opposite direction.

Then, the torque of the DC motor 6 rotates the flat display 1 through the reduction gear 5 and the moving shaft 3 at a critical angle with respect to the opposite direction. As a result, the example shown in Figure 6(a)
If it is a laptop type, as shown in Figure 6(b), the display is moved in the closing direction, and if it is a vertical type, as shown in Figure 6(b), it is moved in the direction in which the display is bowed back.

However, as the flat display 1 rotates around the moving shaft 3 as the rotation axis, the support member 2 that supports the flat display 1 comes into contact with the stopper 8 .

As a result, the torque of the DC motor 6 increases rapidly, and D
The current flowing through the C motor 6 also rises rapidly. In addition, D.C.
Since the current flowing to the motor 6 is supplied from the motor drive IC 27, when the current flowing to the DCC vine rises, the current consumed by the DC motor 6 increases, and the current flowing to the determination line 35 increases.

Furthermore, since the resistance value of the resistor 2829 connected to the node 36 is greater than the resistance value of the resistor 28, most of the current flowing through the determination line 35 flows through the resistor 28.

Therefore, an increase in the current flowing through the DC motor 6 promotes an increase in the voltage at the node 36. This voltage is amplified by a constant factor in the voltage amplification circuit 30 and compared with a reference potential set in the comparison circuit 31. If a voltage exceeding this reference potential is input, the signal input line 32 is set to H level. (turn on current stop signal 5TOP).

As a result, the potentials of both the output lines 33 and 34 become L level, the motor drive IC 27 cuts off the current supply to the DC motor 6, the rotation of the DC motor 6 is stopped, and the signal line connected to the comparison circuit 31 32 is L
level.

〔Effect of the invention〕

As described above, the present invention provides an electronic device equipped with a movable mechanism for moving a flat display and placing it at a desired position, including a driving means for driving the movable mechanism and an indicating means for instructing the movable direction of the flat display. , based on the movable direction specified by the indicating means, the driving means moves the forward direction/
Since the rotation control means for controlling the reverse direction drive is provided, the flat display can be finely adjusted and placed at any angular position with a simple operation.

Furthermore, since the detection means for detecting the amount of movement of the flat display and the stop control means for controlling the driving means to stop based on the output of this detection means are provided, the instruction by the instruction means can be continued and the flat display can be activated. Even if the movable range is exceeded, the driving of the driving means can be automatically stopped, and there are excellent effects such as being able to prevent damage to the driving means and its peripheral circuits.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a configuration diagram illustrating the configuration of an electronic device showing a first embodiment of the present invention, and FIG. 2 is an example of the drive circuit for the DC motor shown in FIG. 1. FIG. 3 is a circuit diagram showing another configuration example of the DC motor drive circuit shown in FIG. 2, and FIG. 4 explains the structure of an electronic device showing a second embodiment of the present invention. FIG. 5 is a circuit diagram showing an example of the drive circuit of the DC motor shown in FIG. 4, and FIGS.
) is a perspective view illustrating the configuration of a flat display device in a conventional electronic device. In the figure, 1 is a flat display, 2.4 is a support member, 3 is a moving shaft, 5 is a reduction gear, 6 is a DC motor, 21.22 is a switch, and 11.27 is a motor drive IC.

Claims (2)

[Claims] (1) In an electronic device equipped with a movable mechanism for moving and placing a flat display at a desired position, a driving means for driving the movable mechanism, an indicating means for instructing a movable direction of the flat display, and this indicating means and rotation control means for controlling forward/reverse direction driving by the drive means based on the movable direction specified by the electronic device. (2) The electronic device according to claim (1), further comprising a detection means for detecting the amount of movement of the flat display, and a stop control means for controlling the stop of the driving means based on the output of the detection means. device.