CN113132697A - Projection device, detection device and detection method thereof - Google Patents
Projection device, detection device and detection method thereof Download PDFInfo
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- CN113132697A CN113132697A CN201911391085.XA CN201911391085A CN113132697A CN 113132697 A CN113132697 A CN 113132697A CN 201911391085 A CN201911391085 A CN 201911391085A CN 113132697 A CN113132697 A CN 113132697A
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- projection lens
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3191—Testing thereof
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Abstract
A projection device, a detection device and a detection method thereof are provided. The detection device is coupled to the projection lens. The detection device comprises a controller and a processor. The controller is used for providing a detection signal to the projection lens. The processor is used for receiving a feedback signal from the projection lens. The feedback signal varies depending on whether the projection lens is provided with an actuator. The invention also provides a projection device with the detection device and a detection method. The invention can instruct a user to replace the projection lens or close the projection device when detecting that the projection lens does not have the actuator, thereby maintaining the projection effect of the projection device.
Description
[ technical field ] A method for producing a semiconductor device
The present invention relates to an optical device, and more particularly, to a projection apparatus, a detection apparatus and a detection method thereof.
[ background of the invention ]
In the known projection technology, if the projection lens installed in the projection device does not have a motor, the projection lens of the projection device cannot perform the electric focusing and/or the electric zooming operation on the projection screen. However, the known projection apparatus generally cannot detect whether or not the projection lens has a motor.
Therefore, when the projection lens without the motor is mounted on the projection device, the user cannot immediately replace the projection lens and/or turn off the projection device, in addition to the problem that the projection image projected by the projection device cannot achieve better light-emitting efficiency and brightness.
In view of the above, it is an object of the present invention to effectively detect that the projection lens does not have a motor, so that the user can immediately replace the projection lens and/or turn off the projection apparatus according to the prompt message.
The background section is provided only to aid in understanding the present disclosure, and thus the disclosure in the background section may include some techniques not known to those of ordinary skill in the art. The disclosure in the "background" section does not represent a representation of the disclosure or the problems that may be solved by one or more embodiments of the present invention, but is understood or appreciated by one of ordinary skill in the art prior to filing the present application.
[ summary of the invention ]
The invention provides a projection device, a detection device and a detection method thereof, which can instruct a user to replace a projection lens and/or close the projection device when detecting that the projection lens does not have an actuator, thereby maintaining the projection effect of the projection device.
Other objects and advantages of the present invention will be further understood from the technical features disclosed in the present invention.
To achieve one or a part of or all of the above or other objects, an embodiment of the invention provides a detection device coupled to a projection lens. The detection device comprises a controller and a processor. The controller is used for providing a detection signal to the projection lens. The processor is coupled to the projection lens and used for receiving a feedback signal from the projection lens, wherein the feedback signal is changed according to whether the projection lens is provided with an actuator or not.
To achieve one or a part of or all of the above or other objects, an embodiment of the invention provides a projection apparatus. The projection device comprises a projection lens and a detection device. The detection device is coupled to the projection lens and comprises a controller and a processor. The controller is used for providing a detection signal to the projection lens. The processor is coupled to the projection lens and used for receiving a feedback signal from the projection lens, wherein the feedback signal is changed according to whether the projection lens is provided with an actuator or not.
To achieve one or a part of or all of the above or other objects, an embodiment of the invention provides a detection method of a detection device. The detection method comprises the following steps: providing a detection signal to the projection lens by the controller; receiving, by a processor, a feedback signal from the projection lens, wherein the feedback signal varies depending on whether the projection lens is provided with an actuator.
Based on the above, the embodiments of the invention have at least one of the following advantages or efficacies. The projection device, the detection device and the detection method thereof can judge whether the projection lens is provided with the actuator or not through the processor. When the controller receives the detection result indicating that the projection lens has the actuator, the controller can generate a normal prompt message to prompt a user to operate normally, and when the controller receives the detection result indicating that the projection lens does not have the actuator, the controller can generate an abnormal prompt message to prompt the user to replace the current projection lens or turn off the power supply. Therefore, the invention can instruct the user to replace the projection lens or close the projection device under the condition that the projection lens does not have the actuator, thereby maintaining the projection effect of the projection device.
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
[ description of the drawings ]
Fig. 1 is a schematic diagram illustrating a projection apparatus according to an embodiment of the invention.
Fig. 2 is a flowchart illustrating an operation of the projection apparatus shown in fig. 1 according to an embodiment of the invention.
FIG. 3 is a circuit diagram illustrating the processor shown in FIG. 1 according to one embodiment of the invention.
[ notation ] to show
100: detection device
110: controller
120: processor with a memory having a plurality of memory cells
130: driver
200: projection device
ACS: control signal of rotation angle
And (2) DS: detecting the signal
DR: the result of the detection
FS: feedback signal
GND: grounding terminal
ID: drive current
L1: actuator
M1: transistor with a metal gate electrode
PS: prompt information
P1: output end
PL: projection lens
R1: resistance (RC)
SCS: speed control signal
S210 to S280: step (ii) of
VA: bias voltage
[ detailed description ] embodiments
The foregoing and other technical and other features and advantages of the invention will be apparent from the following detailed description of a preferred embodiment, taken in conjunction with the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting.
Fig. 1 is a schematic diagram illustrating a projection apparatus 200 according to an embodiment of the invention. Referring to fig. 1, in the present embodiment, a projection apparatus 200 includes a detection apparatus 100 and a projection lens PL. The detection device 100 may be coupled to the projection lens PL to detect whether the projection lens PL has an actuator L1 (e.g. a motor). The actuator L1 of the present embodiment is shown in fig. 1 in the form of an inductor (i.e., a motor coil).
The detection apparatus 100 includes a controller 110, a processor 120, and a driver 130. The controller 110 is coupled to the projection lens PL. The controller 110 may provide a detection signal DS to the projection lens PL to detect whether the projection lens PL is provided with the actuator L1. In addition, the controller 110 can generate the rotation angle control signal ACS and the rotation speed control signal SCS according to preset parameters. The rotation angle control signal ACS is related to the number of steps of the rotation of the actuator L1, and the rotation speed control signal SCS is related to the rotation speed of the actuator L1.
The processor 120 is coupled between the projection lens PL and the controller 110. The processor 120 receives the feedback signal FS provided by the projection lens PL and generates the detection result DR according to the feedback signal FS.
The driver 130 is coupled between the controller 110 and the projection lens PL. The driver 130 can generate the corresponding driving current ID according to the rotation angle control signal ACS and the rotation speed control signal SCS. When the projection lens PL includes the actuator L1, the driver 130 can drive the actuator L1 by the drive current ID.
In the embodiment, the controller 110 may be a Central Processing Unit (CPU) having a single core or multiple cores, or other programmable general purpose or special purpose Microprocessor (Microprocessor), Digital Signal Processor (DSP), or programmable controller, but is not limited thereto.
Referring to fig. 1 and fig. 2 together, fig. 2 is a flowchart illustrating an operation of the projection apparatus 200 shown in fig. 1 according to an embodiment of the invention. In detail, in step S210, the projection apparatus 200 is started. After the projector 200 is powered on, power is supplied to the detection device 100 to start detection operation. In step S220, the controller 110 provides the detection signal DS to the projection lens PL, and the controller 110 may provide the detection signal DS to the projection lens PL within a preset time (for example, within 1 second after the controller 110 is started, but the invention is not limited thereto). The detection signal DS of the present embodiment may be, for example, a square wave or a signal with an arbitrary waveform, and the present invention is not particularly limited.
In step S230, the processor 120 receives a feedback signal FS from the projection lens PL, which varies depending on whether the projection lens PL of the projection apparatus 200 is provided with the actuator L1. After receiving the detection signal DS, the projection lens PL provides a feedback signal FS to the processor 120 in different states according to whether the actuator L1 is provided. For example, when the projection lens PL is provided with the actuator L1, the projection lens PL may provide the feedback signal FS having a first voltage level (e.g., a high voltage level) to the processor 120. In contrast, when the projection lens PL does not have the actuator L1, the projection lens PL may provide the feedback signal FS having a second voltage level (e.g., a low voltage level) to the processor 120. Wherein the first voltage level is higher than the second voltage level. In other embodiments, the first voltage level may be a low voltage level and the second voltage level may be a high voltage level, the first voltage level being lower than the second voltage level. In addition, the feedback signal FS may be related to the detection signal DS, and the feedback signal FS may vary depending on whether the projection lens PL has the actuator L1.
In step S240, the processor 120 generates a detection result DR according to the feedback signal FS. After the processor 120 receives the feedback signal FS, the processor 120 may generate the detection result DR according to a state (i.e., a low voltage level state or a high voltage level state) of the feedback signal FS. For example, when the processor 120 receives the feedback signal FS having a first voltage level, it indicates that the projection lens PL has the actuator L1. In this case, the processor 120 may generate the detection result DR indicating that the projection lens PL is provided with the actuator L1 according to the feedback signal FS having the first voltage level. In contrast, when the processor 120 receives the feedback signal FS having the second voltage level, it indicates that the projection lens PL does not have the actuator L1. In this case, the processor 120 may generate a detection result DR indicating that the projection lens PL does not have the actuator L1 according to the feedback signal FS having the second voltage level.
In step S250, the controller 110 receives the detection result DR and generates the prompt information PS according to the detection result DR. After the controller 110 receives the detection result DR, in step S260, the controller 110 may determine whether the detection result DR indicates that the projection lens PL is provided with the actuator L1. Further, in the present embodiment, when the controller 110 determines that the detection result DR indicates that the projection lens PL includes the actuator L1, the controller 110 performs the operation of step S270 and generates the normal prompt information PS. When the controller 110 determines in step S260 that the detection result DR indicates that the projection lens PL does not include the actuator L1, the controller 110 executes the operation in step S280 and generates the indication information PS indicating an abnormality.
For example, under some design requirements (in some embodiments), when the detection result DR indicates that the projection lens PL is provided with the actuator L1, it indicates that the projection lens PL can be used normally without performing a replacement operation. At this time, the controller 110 can provide the normal prompt information PS to the projection lens PL, so that the projection lens PL can project the picture according to the prompt information PS, thereby prompting the user to perform the related operation normally. In contrast, when the detection result DR indicates that the projection lens PL does not include the actuator L1, it indicates that the projection lens PL cannot perform the focusing and/or zooming operation on the projection screen. At this time, the controller 110 may provide the indication information PS as abnormal to the projection lens PL so that the projection lens PL can project a picture according to the indication information PS, thereby prompting the user to change the current projection lens PL to a projection lens with an actuator and/or to turn off the power of the projection apparatus 200.
In an embodiment, after the user turns off the power of the projection apparatus and replaces the projection lens with the actuator according to the abnormal prompt message PS, the power of the projection apparatus 200 may be turned on again, and the detection method shown in fig. 2 returns to step S210 to perform the detection operation in the subsequent steps again.
In other embodiments, when the detection result DR indicates that the projection lens PL has the actuator L1, the controller 110 may provide a normal prompt message PS to a display interface (e.g., an indicator light) (not shown). Therefore, the indicator light can generate green light according to the prompt message PS, so as to prompt the user to perform related operations normally. In contrast, when the detection result DR indicates that the projection lens PL does not have the actuator L1, the controller 110 may provide a prompt message PS to the display interface as an abnormality. Here, the indicator light may generate a red light according to the prompt information PS, so as to prompt the user to replace the current projection lens PL with the projection lens having the actuator and/or to turn off the power supply of the projection lens PL.
Particularly, when the projection lens PL includes the actuator L1, the driver 130 can control the number of steps of the rotation of the actuator L1 according to the rotation angle control signal ACS, and can control the rotation speed of the actuator L1 according to the rotation speed control signal SCS, so that the projection lens PL can effectively focus and zoom the projection image through the actuator L1.
Fig. 3 is a circuit diagram illustrating the processor 120 shown in fig. 1 and 2 according to an embodiment of the invention. In the present embodiment, the processor 120 includes a transistor M1 and a resistor R1. The transistor M1 may be implemented by, for example, an N-type or P-type transistor, but the present invention is not limited thereto, and fig. 3 illustrates an N-type transistor as an example.
The first terminal and the base terminal of the transistor M1 are commonly coupled to the ground GND, the second terminal of the transistor M1 is coupled to the output terminal P1, and the control terminal of the transistor M1 receives the feedback signal FS. The first terminal of the resistor R1 is coupled to the bias voltage VA, and the second terminal of the resistor R1 is coupled to the output terminal P1.
With respect to the operation details of the processor 120, referring to fig. 1 and fig. 3, in detail, when the projection lens PL is provided with the actuator L1, the projection lens PL can use the actuator L1 to use the detection signal DS as the feedback signal FS, and provide the feedback signal FS to the control terminal of the transistor M1 through the transmission path between the projection lens PL and the processor 120.
In particular, the feedback signal FS of the present embodiment is related to the detection signal DS (e.g. one or more square wave signals). When the feedback signal FS operates at a high voltage level, the transistor M1 may be turned on, so that the voltage level of the output terminal P1 is pulled down to the voltage level of the ground terminal GND. In this case, the processor 120 may generate the detection result DR having a low voltage level to the controller 110 according to the feedback signal FS.
In other words, when the controller 110 receives the detection result DR having a low voltage level, it indicates that the projection lens PL is provided with the actuator L1, and thus the presentation information PS is generated as normal.
On the other hand, when the projection lens PL does not have the actuator L1, the control terminal of the transistor M1 may receive the feedback signal FS of a low voltage level. In this case, the transistor M1 can be turned off, and the voltage level of the output terminal P1 is pulled up to the voltage level of the bias voltage VA, so that the processor 120 can generate the detection result DR with a high voltage level to the controller 110 according to the feedback signal FS.
In other words, when the controller 110 receives the detection result DR having a high voltage level, it indicates that the projection lens PL does not have the actuator L1, and thus the presentation information PS is generated as an abnormality.
It should be noted that the transistor M1 may also be a P-type transistor (not shown), in which case when the feedback signal FS operates at a low voltage level, the transistor M1 may be turned on, so that the voltage level of the output terminal P1 is pulled down to the voltage level of the ground terminal GND. In this case, the processor 120 may generate the detection result DR having a low voltage level to the controller 110 according to the feedback signal FS.
On the other hand, when the projection lens PL does not have the actuator L1, the control terminal of the transistor M1 may receive the feedback signal FS of a high voltage level. In this case, the transistor M1 can be turned off, and the voltage level of the output terminal P1 is pulled up to the voltage level of the bias voltage VA, so that the processor 120 can generate the detection result DR with a high voltage level to the controller 110 according to the feedback signal FS.
It should be noted that the present embodiment does not limit the way in which the processor 120 determines whether the projection lens PL is provided with the actuator L1. The determination of the processor 120 may be determined according to design requirements. For example, the processor 120 may be a switching circuit as known to one of ordinary skill in the art under some design requirements.
In summary, the embodiments of the invention have at least one of the following advantages or effects. The projection device, the detection device and the detection method thereof can judge whether the projection lens is provided with the actuator or not through the processor. When the controller receives the detection result indicating that the projection lens has the actuator, the controller can generate a normal prompt message to prompt a user to operate normally, and when the controller receives the detection result indicating that the projection lens does not have the actuator, the controller can generate an abnormal prompt message to prompt the user to replace the current projection lens or turn off the power supply. Therefore, the invention can instruct the user to replace the projection lens or close the projection device under the condition that the projection lens does not have the actuator, thereby maintaining the projection effect of the projection device.
Claims (22)
1. A detection apparatus coupled to a projection lens, the detection apparatus comprising a controller and a processor, wherein,
the controller is used for providing a detection signal to the projection lens; and
the processor is coupled to the projection lens and used for receiving a feedback signal from the projection lens, wherein the feedback signal is changed according to whether the projection lens is provided with an actuator or not.
2. The detecting device for detecting the rotation of a motor rotor according to the claim 1, wherein the processor generates a detection result according to the feedback signal, and the controller receives the detection result and generates a prompt message according to the detection result.
3. The apparatus according to claim 2, wherein the controller generates the warning information as normal when the detection result indicates that the projection lens is provided with the actuator, and generates the warning information as abnormal when the detection result indicates that the projection lens is not provided with the actuator.
4. The detecting device according to claim 3, wherein the processor determines that the projection lens is provided with the actuator when the feedback signal has a first voltage level, and determines that the projection lens is not provided with the actuator when the feedback signal has a second voltage level, wherein the first voltage level is higher than the second voltage level.
5. The detecting device according to claim 3, wherein the processor determines that the projection lens is provided with the actuator when the feedback signal has a first voltage level, and determines that the projection lens is not provided with the actuator when the feedback signal has a second voltage level, wherein the second voltage level is higher than the first voltage level.
6. The detecting device of claim 1, wherein the controller generates a rotation angle control signal and a rotation speed control signal according to preset parameters, and the detecting device further comprises a driver coupled to the controller and the projection lens,
when the projection lens is provided with the actuator, the driver generates a corresponding driving current to the actuator according to the rotation angle control signal and the rotation speed control signal.
7. The sensing device of claim 6, wherein the driver controls the number of steps of rotation of the actuator in accordance with the rotation angle control signal, and the driver controls the rotation speed of the actuator in accordance with the rotation speed control signal.
8. A projection device is characterized in that the projection device comprises a projection lens and a detection device, wherein,
the detection device is coupled to the projection lens, the detection device includes a controller and a processor, wherein,
the controller is used for providing a detection signal to the projection lens; and
the processor is coupled to the projection lens for receiving a feedback signal from the projection lens,
wherein the feedback signal varies depending on whether the projection lens is provided with an actuator.
9. The projection apparatus as claimed in claim 8, wherein the processor generates a detection result according to the feedback signal, and the controller receives the detection result and generates a prompt message according to the detection result.
10. The projection apparatus according to claim 9, wherein the controller generates the indication information that is normal when the detection result indicates that the projection lens is provided with the actuator, and generates the indication information that is abnormal when the detection result indicates that the projection lens is not provided with the actuator.
11. The projection apparatus of claim 10, wherein the processor determines that the projection lens is provided with the actuator when the feedback signal has a first voltage level, and indicates that the projection lens is not provided with the actuator when the detection result has a second voltage level, wherein the first voltage level is higher than the second voltage level.
12. The projection apparatus of claim 10, wherein the processor determines that the projection lens is provided with the actuator when the feedback signal has a first voltage level, and indicates that the projection lens is not provided with the actuator when the detection result has a second voltage level, wherein the second voltage level is higher than the first voltage level.
13. The projection apparatus according to claim 10, wherein when the controller generates the indication message indicating an abnormality, the projection apparatus performs a shutdown operation according to the indication message indicating an abnormality.
14. The projection apparatus according to claim 8, wherein the controller generates a rotation angle control signal and a rotation speed control signal according to preset parameters, and the detection apparatus further comprises a driver coupled to the controller and the projection lens,
when the projection lens is provided with the actuator, the driver generates a corresponding driving current to the actuator according to the rotation angle control signal and the rotation speed control signal.
15. The projection apparatus as claimed in claim 14, wherein the driver controls the number of steps of the rotation of the actuator according to the rotation angle control signal, and the driver controls the rotation speed of the actuator according to the rotation speed control signal.
16. A detection method of a detection device, the detection method comprising the steps of:
providing a detection signal to the projection lens by the controller; and
receiving, by a processor, a feedback signal from the projection lens,
wherein the feedback signal varies depending on whether the projection lens is provided with an actuator.
17. The detection method according to claim 16, further comprising the steps of:
generating a detection result by the processor according to the feedback signal; and
and receiving the detection result by the controller, and generating prompt information according to the detection result.
18. The method of claim 17, wherein the step of receiving the detection result by the controller and generating the prompt message according to the detection result comprises the steps of:
when the detection result indicates that the projection lens is provided with the actuator, generating the prompt message which is normal by the controller; and
when the detection result indicates that the projection lens is not provided with the actuator, the prompt information is generated as abnormal by the controller.
19. The detecting method according to claim 18, wherein the processor determines that the projection lens is provided with the actuator when the feedback signal has a first voltage level, and determines that the projection lens is not provided with the actuator when the feedback signal has a second voltage level, wherein the first voltage level is higher than the second voltage level.
20. The detecting method according to claim 18, wherein the processor determines that the projection lens is provided with the actuator when the feedback signal has a first voltage level, and determines that the projection lens is not provided with the actuator when the feedback signal has a second voltage level, wherein the second voltage level is higher than the first voltage level.
21. The detection method according to claim 16, further comprising the steps of:
the controller generates a rotation angle control signal and a rotation speed control signal according to preset parameters; and
when the projection lens is provided with the actuator, the driver generates a corresponding driving current to the actuator according to the rotation angle control signal and the rotation speed control signal.
22. The detection method according to claim 21, wherein the number of steps of rotation of the actuator is controlled by the driver in accordance with the rotation angle control signal, and the rotation speed of the actuator is controlled by the driver in accordance with the rotation speed control signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911391085.XA CN113132697A (en) | 2019-12-30 | 2019-12-30 | Projection device, detection device and detection method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911391085.XA CN113132697A (en) | 2019-12-30 | 2019-12-30 | Projection device, detection device and detection method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW225007B (en) * | 1994-01-17 | 1994-06-11 | Ind Tech Res Inst | Lens driving device |
| CN101303393A (en) * | 2007-05-08 | 2008-11-12 | 鸿富锦精密工业（深圳）有限公司 | Monitoring system and monitoring method of motor operation |
| CN110296815A (en) * | 2019-07-02 | 2019-10-01 | 舜宇光学(中山)有限公司 | Detection device and detection method for electromotive focusing camera lens |
-
2019
- 2019-12-30 CN CN201911391085.XA patent/CN113132697A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW225007B (en) * | 1994-01-17 | 1994-06-11 | Ind Tech Res Inst | Lens driving device |
| CN101303393A (en) * | 2007-05-08 | 2008-11-12 | 鸿富锦精密工业（深圳）有限公司 | Monitoring system and monitoring method of motor operation |
| CN110296815A (en) * | 2019-07-02 | 2019-10-01 | 舜宇光学(中山)有限公司 | Detection device and detection method for electromotive focusing camera lens |
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