CN102736377A - Optical device and lens movement control method thereof - Google Patents

Abstract

The invention relates to an optical device and a lens movement control method thereof. The horizontal driving unit enables the lens to move along the horizontal direction through the horizontal transmission module. The horizontal angle sensing component senses the horizontal movement of the lens and sends out a horizontal sensing signal. The vertical driving unit moves the lens in the vertical direction through the vertical transmission module. The vertical angle sensing component senses the vertical movement of the lens and sends a vertical sensing signal. The user interface sends out an operation signal. The control unit controls the lens to move according to the operation signal, the horizontal sensing signal and the vertical sensing signal.

Description

Optical device and lens movement control method thereof

technical field

The invention relates to an optical device, in particular to an optical device capable of preventing lens from colliding and a lens movement control method thereof.

Background technique

The known optical device, as disclosed in Taiwan Patent Publication No. 200905354, mainly uses a stepping motor to control the displacement of the lens. Although stepping motors can achieve the purpose of controlling displacement in a relatively simple way, since the horsepower output of stepping motors is lower than that of DC motors, when stepping motors are installed in optical devices such as projectors, they do not have Enough horsepower to move high-quality glass lenses. Therefore, the known technology is not suitable for high-end projectors.

Contents of the invention

The technical problem to be solved by the present invention is to provide an optical device and its lens movement control method, which can be applied to high-end projection machine.

The technical solution adopted by the present invention to solve the technical problem is to provide an optical device, including a lens, a horizontal transmission module, a vertical transmission module, a horizontal driving unit, a vertical driving unit, a horizontal angle sensing component, a vertical angle sensing component, User interface and control unit. The horizontal driving unit moves the lens along the horizontal direction through the horizontal transmission module. The horizontal angle sensing component senses the horizontal movement of the lens and sends out a horizontal sensing signal. The vertical driving unit moves the lens along the vertical direction through the vertical transmission module. The vertical angle sensing component senses the vertical movement of the lens and sends out a vertical sensing signal. The user interface sends out an operation signal. The control unit controls the movement of the lens according to the operation signal, the horizontal sensing signal and the vertical sensing signal.

In the optical device of the present invention, the horizontal drive unit includes a DC motor.

In the optical device of the present invention, the vertical driving unit includes a DC motor.

In the optical device of the present invention, the horizontal angle sensing component is a rotary encoder.

In the optical device of the present invention, the vertical angle sensing component is a rotary encoder.

In the optical device of the present invention, the horizontal angle sensing component is connected to the horizontal transmission module.

In the optical device of the present invention, the vertical angle sensing component is connected to the vertical transmission module.

The present invention also provides a lens movement control method, including:

providing an optical device as described above;

calculating the coordinate value of the lens according to the horizontal sensing signal and the vertical sensing signal; and

The coordinate value is input into the boundary control equation, and when the coordinate value satisfies the boundary control equation, the control unit restricts the movement of the horizontal drive unit or the vertical drive unit to prevent the lens from colliding.

In the lens movement control method of the present invention, further comprising:

the control unit controls the horizontal drive unit or the vertical drive unit to rotate according to the operation signal; and

The control unit controls the rotation direction of the horizontal driving unit and the vertical driving unit according to the operation signal.

In the lens movement control method of the present invention, further comprising:

providing a storage unit electrically connected to the control unit;

The control unit stores the coordinate value into the storage unit;

When the optical device is turned on, the control unit retrieves the coordinate value from the storage unit to determine the position of the lens.

In the lens movement control method of the present invention, the control unit adds and subtracts the horizontal position variable and the horizontal sensing signal to calculate the horizontal coordinate value of the lens.

In the lens movement control method of the present invention, the control unit adds and subtracts the vertical position variable and the vertical sensing signal to calculate the vertical coordinate value of the lens.

In the lens movement control method of the present invention, the level sensing signal is a square wave.

In the lens movement control method of the present invention, the vertical sensing signal is a square wave.

In the lens movement control method of the present invention, the horizontal drive unit includes a DC motor.

In the lens movement control method of the present invention, the vertical driving unit includes a DC motor.

In the lens movement control method of the present invention, the horizontal angle sensing component is a rotary encoder.

In the lens movement control method of the present invention, the vertical angle sensing component is a rotary encoder.

In the lens movement control method of the present invention, the horizontal angle sensing component is connected to the horizontal transmission module.

In the lens movement control method of the present invention, the vertical angle sensing component is connected to the vertical transmission module.

By applying the optical device and the lens movement control method of the present invention, a high-power DC motor can be used to move a high-quality glass lens, so it can be applied to high-end projectors. At the same time, the cost of the DC motor is relatively low, so the market competitiveness of the product can be improved.

Description of drawings

Fig. 1 shows the optical device of the embodiment of the present invention;

Fig. 2 shows the detailed structure of horizontal transmission module and horizontal driving unit of the present invention;

Figure 3 shows the movable range and safe range of the lens;

Fig. 4 shows the user interface of the embodiment of the present invention;

Fig. 5 shows the lens movement control method of the embodiment of the present invention; And

FIG. 6 shows the detailed flow of the lens movement control method according to the embodiment of the present invention.

Detailed ways

1, it shows an optical device 100 according to an embodiment of the present invention, including a lens 110, a horizontal transmission module 120, a vertical transmission module 130, a horizontal driving unit (horizontal motor) 140, a horizontal angle sensing assembly 150, a vertical driving unit (vertical motor) 160, a vertical angle sensing component 170, a user interface 180 and a control unit 190. The horizontal transmission module 120 is connected to the lens 110 . The vertical transmission module 130 is connected to the lens 110 . The horizontal driving unit 140 is connected to the horizontal transmission module 120 , and the horizontal driving unit 140 moves the lens 110 horizontally through the horizontal transmission module 120 . The horizontal angle sensing component 150 senses the horizontal movement of the lens 100 and sends out a horizontal sensing signal. The vertical driving unit 160 is connected to the vertical transmission module 130 , and the vertical driving unit 160 moves the lens 110 vertically through the vertical transmission module 130 . The vertical angle sensing component 170 senses the vertical movement of the lens 110 and sends out a vertical sensing signal. The user interface 180 sends out operation signals. The control unit 190 is electrically connected to the user interface 180, the horizontal angle sensing component 150, the vertical angle sensing component 170, the horizontal driving unit 140, and the vertical driving unit 160, wherein the control unit 190 according to the operation signal , the horizontal sensing signal and the vertical sensing signal control the movement of the lens.

In an embodiment of the present invention, the horizontal driving unit 140 includes a DC motor, and the vertical driving unit 160 includes a DC motor. The horizontal angle sensing component 150 is a rotary encoder, and the vertical angle sensing component 170 is also a rotary encoder. The horizontal angle sensing component 150 is connected to the horizontal transmission module 120 , and the vertical angle sensing component 170 is connected to the vertical transmission module 130 .

Referring to FIG. 2 , it shows the detailed structure of the horizontal transmission module 120 and the horizontal driving unit 140 of the present invention, wherein the horizontal transmission module 120 includes components such as a gear 121 , a gear 122 and a screw 123 . The horizontal driving unit 140 is connected to the gear 121 and drives the horizontal transmission module 120 through the gear 121 . The horizontal angle sensing component 150 is disposed at one end of the screw 123 , and when the sensing screw 123 rotates, the horizontal angle sensing component 150 outputs a square wave with high and low levels. The control unit 190 can obtain the rotation amount of the screw 123 according to the number of level changes, that is, it can be converted into the horizontal movement amount of the lens 110 . In one embodiment, the control unit 190 can obtain the horizontal coordinate value of the lens 110 by adding and subtracting the horizontal position variable and the level change times. The structures of the vertical transmission module 130 and the vertical driving unit 160 are the same as those of the horizontal transmission module 120 and the horizontal driving unit 140 . Meanwhile, the sensing method of the vertical movement amount and the vertical coordinate value of the lens 110 is also the same as that of the horizontal movement amount and the horizontal coordinate value. In a modified example of the present invention, the horizontal angle sensing component 150 can also be disposed on the horizontal driving unit 140 , and similarly, the vertical angle sensing component 170 can also be disposed on the vertical driving unit 160 .

As mentioned above, in the embodiment of the present invention, the control unit 190 calculates the coordinates (horizontal and vertical coordinates, eg, x-y coordinates) of the lens 110 according to the horizontal sensing signal and the vertical sensing signal. The control unit 190 inputs the coordinate value into the boundary control equation (such as x-y equation), and when the coordinate value satisfies the boundary control equation, the control unit 190 limits the action of the horizontal drive unit 140 or the vertical drive unit 160 to prevent The lens 110 collides.

Referring to FIG. 3 , the boundary control equation prevents the lens from colliding with the boundary (mechanism edge) of the movable range 10 by setting a safety range 20 within the movable range 10 of the lens. The safety range 20 can be obtained directly through mathematical operations. And the boundary governing equation defines the edge of the safe range 20 .

Referring to FIG. 4 , it shows a user interface 180 according to an embodiment of the present invention, which has an up key 181 , a down key 182 , a left key 183 and a right key 184 .

Referring to FIG. 5 , it shows a lens movement control method according to an embodiment of the present invention, including the following steps: First, an optical device according to an embodiment of the present invention is provided ( S1 ). Then, calculate the coordinate value of the lens 110 according to the horizontal sensing signal and the vertical sensing signal ( S2 ). Finally, input the coordinate value into the boundary control equation, when the coordinate value satisfies the boundary control equation, the control unit 190 limits the movement of the horizontal drive unit 140 or the vertical drive unit 160 to prevent the lens 110 from colliding (S3 ). Applying the above lens movement control method, the control unit 190 can control the horizontal drive unit 140 or the vertical drive unit 160 to rotate according to the operation signal, and control the horizontal drive unit 140 and the vertical drive unit 160 to rotate according to the operation signal. Rotate the direction so that the lens 110 moves in directions such as up, down, left, and right within a safe range.

Considering the requirement of lens positioning after the optical device 100 is restarted, the optical device 100 may further have a storage unit, and the storage unit is electrically connected to the control unit 190 . The control unit 190 can store the coordinate values in the storage unit at any time; when the optical device is turned on, the control unit 190 retrieves the coordinate values from the storage unit to determine the position of the lens 110 .

Referring to FIG. 6 , it shows the detailed process of the camera movement control method according to the embodiment of the present invention, and it mainly shows that when the user presses the up key 181, the down key 182, the left key 183 or the right key 184, the control unit 190 generates different actions.

Applying the optical device of the present invention, a high-quality direct-current motor can be used to move a high-quality glass lens, so it can be applied to high-end projectors. At the same time, the cost of the DC motor is relatively low, so the market competitiveness of the product can be improved.

Although the present invention has been disclosed above with specific preferred embodiments, it is not intended to limit the present invention. Those skilled in the art can still make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the claims.

Claims (24)

1. optical devices is characterized in that, comprising:

Camera lens;

Horizontal transmission module connects this camera lens;

Vertical transmission module connects this camera lens;

The horizontal drive unit connects this horizontal transmission module, and this horizontal drive unit moves this camera lens along continuous straight runs through this horizontal transmission module;

The level angle sensing component, the amount of moving horizontally of this camera lens of sensing is also sent horizontal sensing signal;

Vertical drive units connects this vertical transmission module, and this vertical drive units moves in the vertical direction this camera lens through this vertical transmission module;

The vertical angle sensing component, the vertical moving amount of this camera lens of sensing is also sent the vertical sensing measurement signal;

User's interface sends operation signal; And

Control module; This control module electrically connects this user's interface, this level angle sensing component, this horizontal drive unit, this vertical angle sensing component and this vertical drive units; Wherein, this control module moving according to this operation signal, this horizontal sensing signal and this this camera lens of vertical sensing measurement signal controlling.

2. optical devices as claimed in claim 1 is characterized in that, this horizontal drive unit comprises d.c. motor.

3. optical devices as claimed in claim 1 is characterized in that this vertical drive units comprises d.c. motor.

4. optical devices as claimed in claim 1 is characterized in that, this level angle sensing component is a rotary encoder.

5. optical devices as claimed in claim 1 is characterized in that, this vertical angle sensing component is a rotary encoder.

6. optical devices as claimed in claim 1 is characterized in that, this level angle sensing component connects this horizontal transmission module.

7. optical devices as claimed in claim 1 is characterized in that, this vertical angle sensing component connects this vertical transmission module.

8. optical devices as claimed in claim 1 is characterized in that, these optical devices are projector.

9. optical devices as claimed in claim 1 is characterized in that, these optical devices are video camera.

10. a lens movement control method is characterized in that, comprising:

Optical devices as claimed in claim 1 are provided;

Coordinate figure according to this horizontal sensing signal and this this camera lens of vertical sensing measurement calculated signals; And

With this coordinate figure input boundary Control equation, when this coordinate figure satisfied this boundary Control equation, this control module limited the action of this horizontal drive unit or this vertical drive units, bumped to prevent this camera lens.

11. lens movement control method as claimed in claim 10 is characterized in that, more comprises:

This control module rotates according to this operation signal this horizontal drive unit of control or this vertical drive units; And

This control module is according to the rotation direction of this operation signal this horizontal drive unit of control and this vertical drive units.

12. lens movement control method as claimed in claim 10 is characterized in that, more comprises:

Storage element is provided, electrically connects this control module;

This control module deposits this coordinate figure among this storage element;

When this optical devices start, this control module captures this coordinate figure from this storage element, to judge the position of this camera lens.

13. lens movement control method as claimed in claim 10 is characterized in that, this control module is added and subtracted the horizontal sensing signal of horizontal level variable and this mutually, calculates the horizontal coordinate value of this camera lens.

14. lens movement control method as claimed in claim 10 is characterized in that, this control module subtracts upright position variable and this vertical sensing measurement signal plus, calculates the vertical coordinate value of this camera lens.

15. lens movement control method as claimed in claim 10 is characterized in that, this horizontal sensing signal is a square wave.

16. lens movement control method as claimed in claim 10 is characterized in that, this vertical sensing measurement signal is a square wave.

17. lens movement control method as claimed in claim 10 is characterized in that, this horizontal drive unit comprises d.c. motor.

18. lens movement control method as claimed in claim 10 is characterized in that, this vertical drive units comprises d.c. motor.

19. lens movement control method as claimed in claim 10 is characterized in that, this level angle sensing component is a rotary encoder.

20. lens movement control method as claimed in claim 10 is characterized in that, this vertical angle sensing component is a rotary encoder.

21. lens movement control method as claimed in claim 10 is characterized in that, this level angle sensing component connects this horizontal transmission module.

22. lens movement control method as claimed in claim 10 is characterized in that, this vertical angle sensing component connects this vertical transmission module.

23. lens movement control method as claimed in claim 10 is characterized in that, these optical devices are projector.

24. lens movement control method as claimed in claim 10 is characterized in that, these optical devices are video camera.

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