TWI452457B - Method of controlling the illuminated area of a light source - Google Patents

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, for example, The stage play performance and the like enable it to achieve active tracking and convenient use. The present invention therefore proposes a method for controlling the illumination area of the light source, the steps of which include: A. setting a position information transmitter on a microphone or on the object of the microphone; B. setting at least one tracking sensor corresponding to the position information transmitter, so that the tracking sensor senses the Positioning the location information transmitter and generating a first signal, and then inputting the first signal to a processing unit; C. the processing unit outputs a first control command to a power unit according to the first signal operation processing; The power unit controls the mechanical action of the at least one light source according to the first 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 attached 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 signal The system 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 present invention utilizes a position information transmitter to cooperate with a tracking sensor for matrix positioning The way to position the position information transmitter in the space can achieve the effect of precise positioning.

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.

(1)‧‧‧Microphone

(2) ‧‧‧Location Message Transmitter

(3)‧‧‧Volume detector

(4) ‧‧‧Tracking sensor

(5) ‧‧‧Processing unit

(6) ‧‧‧Power unit

(7) ‧‧‧Light source

(A) ‧ ‧ lecture venue

(B) ‧‧‧ Speaker

(C) ‧ ‧ first signal

(D) ‧ ‧ second signal

(E)‧‧‧First Control Directive

(F) ‧‧‧Second Control Directive

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.

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 first. Signal (C), the first 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 the TOA (time of arrival) positioning method is: the propagation time of the position signal transmitted by the position information transmitter (2) to the tracking sensor (4) multiplied by the propagation speed (usually using the speed of light), thereby obtaining The distance between the position information transmitter (2) and the aforementioned tracking sensor (4) is used for matrix positioning 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 fixed. The positioning method of TDOA can be divided into two steps: firstly, using various time delay estimation (Time Delay Estimation) technology, as far as possible to accurately measure the arrival time difference of the position signals received by the two tracking sensors (4), convert them into distances, and substitute them into the hyperbolic equation to form a set of simultaneous hyperbolic curves. The second step is to find the solution of the simultaneous equations using an efficient and fast algorithm, 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 to use the channel propagation model to describe the path loss attenuation 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 first signal (C) and the second signal (D), the processing unit (5) outputs a first control command (E) to a power unit according to the first 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 first control command (D), so that the light source (7) is tracked and projected to the microphone at any time ( 1) position, wherein the light source (7) in the embodiment preferably uses a spotlight to focus light on the presenter (B) to avoid affecting the projection of the slide during the presentation, and the light source (7) is simultaneously The second control command (E) emits light of different strengths, 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) A weaker light is emitted.

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

(B) ‧‧‧ Speaker

(C) ‧ ‧ first signal

(D) ‧ ‧ second signal

(E)‧‧‧First Control Directive

(F) ‧‧‧Second Control Directive

Claims (2)

A method for controlling an illumination area of a light source, comprising the steps of: A. setting a position information transmitter and a volume detector on a microphone or a subject attached to the microphone; B. setting at least one of the above position information Corresponding to the sensor, the tracking sensor senses the position of the position transmitter and generates a first signal, and the volume detector detects the volume of the microphone to generate a second signal. And inputting the first signal and the second signal to a processing unit; C. the processing unit outputs a first control command to a power unit according to the first signal operation process, and generates a second according to the second signal Controlling the command to the at least one light source; D. The power unit controls the mechanical action of the light source according to the first control command, so that the light source is tracked and projected to the microphone position at any time, and the light source controls the intensity of the light source according to the second control command. 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.