TW201321917A - Method of controlling the illuminated area of a light source - Google Patents

Abstract

The present invention relates to a method of controlling the illuminated area of a light source. It's to track the moving position of an object by a tracking sensor first, and to output a controlling signal to a motion unit according to the moving position of the object by a processor, then the motion unit controls a light source to focus light on the object according to the controlling signal. The present invention can use to focus light on a speaker when speech.

Description

Method for controlling an area illuminated by a light source

The present invention relates to a method of controlling an area of illumination of a light source, and more particularly to a method of focusing a light source on a moving object to be tracked.

When playing a slide in a speech occasion, in order to avoid the situation where the brightness of the projection is not clear due to the brightness of the projection being higher than the projection brightness, the light needs to be turned off. At this time, the position of the presenter is dim, and the listener is not easy to see the gesture or expression of the speaker. Therefore, the spotlight is used to focus the light on the speaker so that the listener can clearly see the speaker without affecting the way the slide is projected.

Among the prior art of the spotlights are the "spotlights" disclosed in the Republic of China Patent No. 587140, or the "LED spotlights" disclosed in the Republic of China Patent No. 200908382.

However, when the spotlight of the previous case is used in a lecture or the like, it is necessary to manually adjust the illumination area to focus the light on the presenter as the speaker moves, which is not convenient to use.

Therefore, in order to enable the spotlight to actively focus on the speaker in a dim speech, and further applicable to other occasions where it is necessary to track the focused light, such as a stage performance, it is possible to achieve active tracking and convenient use. The invention therefore proposes a method of controlling an area of illumination of a light source, the steps of which include:

A. setting a ㄧ position information transmitter on the ㄧ microphone or on the object of the microphone; B. setting at least 追踪 a tracking sensor corresponding to the position information transmitter, so that the tracking sensor senses the Positioning the location information transmitter and generating a third signal, and inputting the third signal to a processing unit; C. the processing unit outputs a second control command to a power unit according to the third signal operation processing; The power unit controls at least the mechanical action of the light source according to the second control command, so that the light source is tracked and projected to the microphone position at any time.

Further, the microphone in step A or the object corresponding to the microphone is further provided with a volume detector, the volume detector detecting the volume of the microphone to generate a second signal, and the second The signal is input to the processing unit, and the processing unit generates a second control command according to the second signal, thereby controlling the intensity of the light source.

Further, the location information transmitter transmits any one of an audio signal, a radio wave signal or a light wave signal for receiving by the tracking sensor, thereby sensing the position of the position information transmitter.

The invention has the following effects:

1. Can be applied in the speech occasion, when the speaker speaks, focus the light on the speaker position, so that the speaker has enough illumination to attract the audience's attention, so that the audience can see the gestures and expressions of the speaker; In stage performances or other occasions where you need to track the focused light.

2. The invention utilizes a position information transmitter to cooperate with the tracking sensor, and adopts a matrix positioning method to perform spatial positioning on the position information transmitter, so that the effect of accurate positioning can be achieved.

3. The method of the present invention can make the light source emit different light and light according to the volume of the speaker's speech, thereby improving the interaction between the speaker and the listener.

4. The method of the invention enables the light source to have the function of automatic tracking and positioning, without manual operation, high precision and saving human resources.

In summary of the above technical features, the main effects of the method of the present invention for controlling the illumination area of a light source can be clearly demonstrated in the following embodiments.
Referring to the first figure and the second figure, the embodiment is applied to a lecture place (A), so the lecture place (A) is set as a tracking sensing area; a position message is set on a microphone (1). A transmitter (2) and a volume detector (3), and a tracking sensor (4) is disposed at each corner of the lecture venue (A).
The method of this embodiment includes the following steps:
A. A lecturer (B) presents the lecture content by holding the microphone (1) at the lecture venue (A).
B. When the presenter (B) moves within the lecture venue (A), the position signal transmitter (2) transmits a position signal such as an acoustic signal, a radio wave signal or a light wave signal for the aforementioned tracking sensor. (4) receiving, the tracking sensor (4) of each of the foregoing corners positions the position information transmitter (2) in the space of the lecture place (A) in a matrix positioning manner, and generates one of the coordinate positions. Signal (C), the third signal (C) is input to a processing unit (5), and the volume of the speaker (B) is detected through the volume detector (3), and the volume is The strong and weak are converted into a second signal (D) input to the processing unit (5).
It should be noted that the techniques for positioning the radio waves as a matrix include technologies such as TOA, TDOA, AOA, and RSSI.
The principle of TOA (time of arrival) positioning method is:
Transmitting the position signal from the position signal transmitter (2) to the propagation time of the tracking sensor (4) by the propagation speed (generally using the speed of light), thereby obtaining the position information transmitter (2) and the aforementioned tracking feeling The distance of the detector (4) is determined by the distance between the position information transmitter (2) and the plurality of tracking sensors (4).
The principle of TDOA (time difference of arrival) is to use the characteristic of hyperbola, that is, the difference between the point and the two focal distances on the hyperbola is a fixed value. The positioning method of TDOA can be divided into two steps:
Firstly, using various techniques of Time Delay Estimation, the time difference of the position signal received by the two tracking sensors (4) is measured as accurately as possible, and then converted into a distance and substituted into the hyperbolic equation to form A set of simultaneous hyperbolic equations; the second step is to use the effective and fast algorithm to obtain the solution of the simultaneous equations, which is the position of the position transmitter (2).
The principle of AOA (angle of arrival) positioning method is:
Use a Directional Antenna or an Antenna Array to determine the source direction of the Active Tag signal, which is the possible direction of the active tag. This direction can be determined on the 2D plane. A line starting from the reader, so that more than two readers measure the direction of the active tag, then the intersection of more than two lines is the possible position of the active tag; here the antenna is the invention The tracking sensor (4), the active tag is the location message transmitter (2) of the present invention.
The principle of RSSI (received signal strength indicator) positioning method is:
The channel propagation model is used to describe the attenuation of path loss for distance. In order to use this method to locate, the propagation loss mode of the environment must be constructed in advance, and the distance between the mobile station and the base station can be determined by the attenuation of the signal strength. The mobile station refers to the location information transmission of the present invention. (2), the base station is the tracking sensor (4) of the present invention, and the position of the mobile station should be located above the circle drawn by the radius corresponding to the base station as the center, so there must be at least 3 bases. Taiwan can be positioned. Because the radio propagates indoors, multiple path interferences produce debilitating and shadowed effects, resulting in a large gap between the received signal strength and the free vacuum propagation result. Therefore, the estimated propagation distance will produce an error, so the estimated position of the mobile station. Will not be handed over, but will fall within an estimated area.
C. After receiving the foregoing signal (C) and the second signal (D), the processing unit (5) outputs a third control command (E) to a power unit according to the third signal (C) operation processing. (6), and outputting a second control command (E) to a light source (7) according to the second signal (D) operation processing.
D. The power unit (6) controls the mechanical action of the light source (7) according to the second control command (D), so that the light source (7) is tracked and projected to the position of the microphone (1) at any time, wherein the light source of the embodiment (7) Preferably, a spotlight is used to focus light on the presenter (B) to avoid affecting the projection of the slide during the presentation, and the light source (7) simultaneously emits different strengths according to the second control command (E). The light, for example, when the volume of the presenter (B) is increased, the light source (7) emits a light of higher intensity, and when the volume of the presenter (B) decreases, the light source (7) emits a weaker light. .
As shown in the second and third figures, the light of the light source (7) is thereby focused on the speaker (B), so that clear illumination can be provided at the speaker (B) position for the listener to see. The gestures and expressions of the speaker (B), and the light of different strengths and weaknesses according to the volume of the speaker (B), to focus on the audience's eyes, can improve the interaction between the speaker (B) and the audience.
Referring to the fourth figure, the position transmitter (2) can be a separate component, and can be carried as a medal or a tag for the speaker to carry, and the light of the light source (7) can also be focused on the speaker ( B) The effect of the body.
In addition to the lecture venue (A) described in the embodiments, such as a stage play or other occasion where tracking of the focused light is desired, the method of the present invention is suitable.
In view of the foregoing description of the embodiments, the operation and the use of the present invention and the effects of the present invention are fully understood, but the above described embodiments are merely preferred embodiments of the present invention, and the invention may not be limited thereto. Included within the scope of the present invention are the scope of the present invention.

(1). . . microphone

(2). . . Location message transmitter

(3). . . Volume detector

(4). . . Tracking sensor

(5). . . Processing unit

(6). . . Power unit

(7). . . light source

(A). . . Lecture place

(B). . . The speaker

(C). . . First signal

(D). . . Second signal

(E). . . First control instruction

(F). . . Second control instruction

The first figure is a functional block diagram of the present invention.

The second figure is a schematic view of the state of use of the present invention, showing that the light source is focused on the presenter.

The third figure is a schematic diagram of the state of use of the present invention, indicating that the light source automatically tracks and focuses on the presenter as the speaker moves.

The fourth figure is a schematic view of another use state of the present invention.

(1). . . microphone

(2). . . Location message transmitter

(3). . . Volume detector

(4). . . Tracking sensor

(5). . . Processing unit

(6). . . Power unit

(7). . . light source

(B). . . The speaker

(C). . . First signal

(D). . . Second signal

(E). . . First control instruction

(F). . . Second control instruction

Claims (3)

A method of controlling an area of illumination of a light source, comprising the steps of:
A. setting a position information transmitter on the microphone or on the object of the microphone;
B. setting at least the tracking sensor corresponding to the position signal transmitter, causing the tracking sensor to sense the position of the position signal transmitter and generating a third signal, and then inputting the third signal to a processing unit;
C. The processing unit outputs a second control command to a power unit according to the third signal operation processing;
D. The power unit controls at least the mechanical action of the light source according to the second control command, so that the light source is tracked and projected to the microphone position at any time. The method for controlling the illumination area of the light source according to the first aspect of the patent application, wherein the microphone in the step A or the object corresponding to the microphone is further provided with a volume detector, the volume detector detecting The second signal is generated by measuring the volume of the microphone, and the second signal is input to the processing unit, and the processing unit generates a second control command according to the second signal, thereby controlling the intensity of the light source. The method for controlling an illumination area of a light source according to claim 1, wherein the position information transmitter transmits any one of an acoustic signal, a radio wave signal or a light wave signal, and is received by the tracking sensor to sense the position. The location of the message transmitter.