CN212660271U

CN212660271U - Projector with a light source

Info

Publication number: CN212660271U
Application number: CN202021734122.0U
Authority: CN
Inventors: 谢子恒; 李志�; 金凌琳
Original assignee: Shenzhen Dangzhi Technology Co ltd
Current assignee: Shenzhen Dangzhi Technology Co ltd
Priority date: 2020-08-14
Filing date: 2020-08-14
Publication date: 2021-03-05
Anticipated expiration: 2030-08-14

Abstract

The utility model discloses a projector, projector includes: a light engine comprising a light source; the distance sensor is arranged close to the optical machine and used for detecting the distance between an object to be detected in front of the optical machine and the distance sensor; the temperature sensor is arranged close to the optical machine and used for detecting the temperature of an object to be detected in front of the optical machine; and the main control circuit is electrically connected with the optical machine, the distance sensor and the temperature sensor and is used for turning on or turning off a light source of the optical machine according to data detected by the distance sensor and the temperature sensor. The utility model discloses technical scheme is favorable to improving the security that the projector used.

Description

Projector with a light source

Technical Field

The utility model relates to a projector technical field, in particular to projector.

Background

Along with the improvement of living standard of people, people also use more and more projectors. Most of projector light machines are strong light source instruments, the light source illumination is large, the temperature is high when the projector light machines are used, and particularly, the projector light machines are large in power and high in brightness. When the fire is shielded by dark inflammable, the temperature in the irradiated area of the inflammable is easy to exceed the ignition point, and a fire is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a projector aims at improving the security that projector used.

In order to achieve the above object, the present invention provides a projector including:

a light engine comprising a light source;

the distance sensor is arranged close to the optical machine and used for detecting the distance between an object to be detected in front of the optical machine and the distance sensor;

the temperature sensor is arranged close to the optical machine and used for detecting the temperature of an object to be detected in front of the optical machine;

and the main control circuit is electrically connected with the optical machine, the distance sensor and the temperature sensor and is used for turning on or turning off a light source of the optical machine according to data detected by the distance sensor and the temperature sensor.

Optionally, the projector further includes a timer, the timer is electrically connected to the main control circuit, and the timer is used for calculating a time length for maintaining the current position of the object to be measured in front of the optical machine.

Optionally, the projector further includes a speaker and a memory, the speaker and the memory are connected to the main control circuit, the speaker is used for voice broadcast, and the memory is used for storing data of the voice broadcast.

Optionally, the projector includes a housing, and the speaker is disposed on the housing.

Optionally, the projector further includes an indicator light, and the indicator light is electrically connected to the main control circuit.

Optionally, the projector includes a housing, and the indicator light is disposed on a surface of the housing, the surface being adjacent to or opposite to a surface of the light engine emitting light.

Optionally, the distance sensor and the temperature sensor are arranged along the circumferential direction of the optical machine.

Optionally, the distance sensor is disposed in an upper side edge region of the optical machine, and a center of the distance sensor and a center of the optical machine are on the same horizontal vertical line.

Optionally, the temperature sensor is disposed in an upper side edge region of the optical machine, and a center of the temperature sensor and a center of the optical machine are on the same horizontal vertical line.

Optionally, the projector further includes an information sending device and a memory, the information sending device and the memory are connected to the main control circuit, the information sending device is configured to send information to the outside, and the memory is configured to store data of the information.

In the technical scheme of the utility model, firstly, the actual distance between the object to be measured in front of the optical machine and the distance sensor is obtained; acquiring a potential safety hazard distance range between the distance sensor and the object to be detected according to a preset safety distance between the optical machine and the object to be detected; then, determining that the actual distance is within the range of the potential safety hazard distance, and turning off a light source of the optical machine; so, have the shelter in front of the ray apparatus, when having the potential safety hazard that the shelter probably was lighted by high temperature, timely light source of closing the ray apparatus avoids the shelter to be lighted, so makes the use of projector become safe, reliable, is favorable to the use of user to the projector.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic flow chart of an embodiment of the over-temperature protection method for switching a projection light source according to the present invention;

fig. 2 is a schematic structural diagram of an embodiment of a projector according to the present invention;

fig. 3 is a schematic structural diagram of the optical machine, the distance sensor and the temperature sensor of the projector according to the present invention;

fig. 4 is a schematic structural diagram of an embodiment of the working principle of the projector of the present invention;

FIG. 5 is a schematic structural diagram of another embodiment of the operating principle of the projector according to the present invention;

FIG. 6 is a projection area of the optical engine of the projector at a distance from the optical engine of the projector;

fig. 7 is a schematic circuit diagram of an embodiment of the projector according to the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Projector with a light source	20	Object to be measured
100	Master control circuit	200	Optical machine
				300	Distance sensor	510	Loudspeaker
520	Indicator light	600	Memory device
				700	Temperature sensor	800	Time-meter

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, "and/or" in the whole text includes three schemes, taking a and/or B as an example, including a technical scheme, and a technical scheme that a and B meet simultaneously; in addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model mainly provides an overtemperature protection method of switch projection light source, which is mainly applied to the projector 10 to improve the safety of the projector 10.

The following will mainly describe the specific contents of the over-temperature protection method for switching the projection light source.

Referring to fig. 1 to 7, in the embodiment of the present invention, the projector 10 includes an optical machine 200 and a distance sensor 300, and the method for protecting the switching projection light source from over-temperature includes the following steps:

acquiring the actual distance between the object 20 to be measured in front of the optical machine 200 and the distance sensor 300;

acquiring a potential safety hazard distance range between the distance sensor 300 and the object 20 to be detected according to a preset safety distance between the optical machine 200 and the object to be detected;

and if the actual distance is determined to be within the range of the safety hazard distance, the light source of the optical machine 200 is turned off.

Specifically, in this embodiment, there are many ways to obtain the actual distance between the object 20 to be detected in front of the optical machine 200 and the distance sensor 300, and the object 20 to be detected may be directly detected by the distance sensor 300, or the distance between the two may be detected by another device, such as an infrared detection sensor, a laser detection sensor, and the like. The distance sensor 300 may work in various ways, such as distance measurement by infrared rays, or distance measurement by laser, and the target distance is obtained by detecting the flight (round trip) time of the light pulse. In addition, the number of detected points on the object 20 to be detected can be selected according to actual requirements, such as one point, two points, three points that are not on the same straight line, and the like.

According to the preset safety distance between the optical machine 200 and the object to be measured, the range of the potential safety hazard distance between the distance sensor 300 and the object to be measured 20 is obtained. The preset safety distance may be set by a user, may be a parameter set by a factory, or may be a parameter obtained by the projection according to an actual working condition, and may be related to one or more factors of the power of the optical machine 200, the material of the blocking object, the ambient temperature, and the ambient humidity. The higher the power and the ambient temperature of the optical machine 200 are, the larger the preset safety distance can be, and under the condition that the power of the optical machine 200 is large, the larger the heat generation is, that is to say, under the condition that the distance from the position of the optical machine is far away, the combustion of a shielding object can be caused when the shielding object is shielded, so that the preset safety distance is large compared with the small power of the optical machine and the large power of the optical machine. The preset safety distance is 9-11 cm, for example 10 cm. The distance sensor 300 is arranged near the optical machine 200, and the preset safety distance is larger, the safety hazard distance range is larger, the preset safety distance is smaller, and the safety hazard distance range is smaller. The obtaining method has various manners, and the obtaining method can be calculated according to a preset formula, and can also be used for inquiring and selecting according to a preset mapping table (a mapping table corresponding to a preset safety distance and a safety hazard distance range). Preferably, in order to improve the accuracy of presetting the safe distance, avoid carrying out the erroneous judgement, preset the safe distance and can obtain the perpendicular distance between object 20 and the ray apparatus 200 to be measured according to the actual distance between distance sensor 300 and the object 20 to be measured, this perpendicular distance can regard as and preset the safe distance, this moment according to this perpendicular distance potential safety hazard distance range, concrete can obtain the perpendicular distance according to presetting the actual distance between safe distance sensor 300 and the object 20 to be measured and rather than the contained angle that corresponds, should understand that this contained angle is the horizontal contained angle with ray apparatus 200. Certainly, in this case, a preset safety distance threshold may be set, that is, after the vertical distance is obtained through calculation, the vertical distance may be compared with the preset safety threshold, if the vertical distance is smaller than the preset threshold, it is determined whether the object 20 to be measured is located in the projection area, if so, the subsequent operation is performed, and if the vertical distance is larger than the preset safety threshold, it is determined that the object is located farther from the optical engine 200, and even in the projection area, the potential safety hazard is difficult to cause, so the subsequent operation is not necessary. It should be noted that, in order to improve the accuracy of the present application for determining the object 20 to be measured, preferably, the distance sensor 300 directly detects the object 20 to be measured, that is, the distance sensor 300 detects an area inclined to the direction of the optical machine 200 by an included angle of 90 degrees or less, because the normal projection area and especially the near projection area are more biased in the direction of the light engine 200, for the direction away from this direction, that is, the direction of the other side of the distance sensor 300 away from the optical engine 200, the small object basically does not block the projection of the optical engine 200, so that there is no safety hazard, therefore, it is not necessary to measure the distance of the object 20 to be measured on the other side away from the optical machine 200, and only the distance sensor 300 detects the actual distance of the object 20 to be measured entering the field in the area inclined to the direction of the optical machine 200 by an included angle of less than or equal to 90 degrees, so as to improve the accuracy of the detection data and reduce unnecessary detections.

And if the actual distance is determined to be within the range of the safety hazard distance, the light source of the optical machine 200 is turned off. Comparing the actual distance (between the object 20 to be measured and the distance sensor 300) with the range of the potential safety hazard distance, if the actual distance is less than or equal to the range of the potential safety hazard distance, it indicates that the object 20 to be measured is close to the optical machine 200, and is easily ignited by the high temperature of the optical machine 200, and is relatively dangerous, the light source of the optical machine 200 should be turned off, and if the actual distance is greater than the range of the potential safety hazard distance, it indicates that the object 20 to be measured is far from the optical machine 200, and is not easily ignited by the high temperature of the optical machine 200, and.

In this embodiment, first, an actual distance between the object 20 to be measured in front of the optical machine 200 and the distance sensor 300 is obtained; then, according to a preset safety distance between the optical machine 200 and the object to be measured, a potential safety hazard distance range between the distance sensor 300 and the object to be measured 20 is obtained; then, if the actual distance is determined to be within the range of the potential safety hazard distance, the light source of the optical machine 200 is turned off; therefore, when a shielding object is arranged in front of the optical machine 200 and potential safety hazards that the shielding object can be ignited at high temperature exist, the light source of the optical machine 200 is turned off in time, the shielding object is prevented from being ignited, the projector 10 is enabled to be safe and reliable to use, and the projector 10 is beneficial to users to use.

There are various ways to obtain the range of the potential safety hazard distance, and the following description will take formula calculation as an example. The step of obtaining the potential safety hazard distance range between the distance sensor 300 and the object 20 to be measured according to the preset safety distance between the optical machine 200 and the object to be measured includes:

acquiring a preset safety distance D, a distance L between the distance sensor 300 and the optical machine 200, and a projection angle theta of the optical machine 200;

calculating a first actual safety distance L1 and a second actual safety distance L2 of the barrier according to the preset safety distance D, the distance L between the distance sensor 300 and the optical machine 200 and the projection angle theta of the optical machine 200; the safety hazard distance range is less than or equal to the larger value of the L1 and the L2, namely, the safety can be judged only if the actual distance between the object 20 to be detected and the distance sensor 300 is greater than the larger value of the L1 and the L2;

wherein the first actual safe leaving

Second actual safe distance

In this embodiment, a preset safety distance D (a distance between the optical machine 200 and the object 20 to be measured), a distance L between the distance sensor 300 and the optical machine 200, and a projection angle θ of the optical machine 200 are first obtained, and then the first actual safety distance L1 and the second actual safety distance L2 are calculated according to the above parameters and formulas. When tan (theta/2) is greater than 0, L1 is less than L2, and when tan (theta/2) is less than 0, L1 is greater than L2; when tan (θ/2) is equal to 0, L1 is equal to L2.

In some embodiments, in order to determine that the detected point on the selected object 20 to be measured is actually valid, the step of acquiring the actual distance between the object 20 to be measured in front of the optical machine 200 and the distance sensor 300 includes:

acquiring actual distances L3 and L4 between two points on the object 20 to be detected and the optical machine 200, wherein the distance between the two detected points on the object 20 to be detected is smaller than or equal to the diameter d of the projection area M of the optical machine 200 at the preset safety distance. Referring to fig. 4 and 5, the projection of the optical engine 200 is a truncated cone, the distance from the optical engine 200 is different, and the area (diameter) of the projected area is different, and the circle in the figure is the projection area M of the optical engine 200 at the distance D (safety distance), and the shape of the projection area is exemplified by a circular ring. By setting the distance between the two detected points to be less than or equal to the diameter d of the projection area, it can be ensured that both detected points are within the projection area M of the optical engine 200, i.e. on the optical path of the optical engine 200. Therefore, the effectiveness of two detected signals is improved, and the detection and judgment accuracy is improved.

In some embodiments, to improve the accuracy of the determination, the step of determining that the actual distance is within the range of the safety hazard distance includes:

comparing L3 and L1 to L2, determining that L3 is less than or equal to L1, or, less than or equal to L2;

comparing L4 and L1 to L2, it was determined that L4 is less than or equal to L1, alternatively, less than or equal to L2.

Specifically, in the present embodiment, the distance L3 (the distance between the distance sensor 300 and the first detection point P) at the first detection point P on the object 20 to be detected, and the distance L4 (the distance between the distance sensor 300 and the second detection point Q) at the second detection point Q on the object 20 to be detected are detected by the distance sensor 300. Comparing L3 with L1 and L2 respectively, and when L3 is less than or equal to L1 or L2, indicating that the point P is in the range of potential safety hazards; comparing L4 with L1 and L2 respectively, and when L4 is less than or equal to L1 or L2, indicating that the Q point is within the range of the potential safety hazard distance; at this time, it is indicated that at least two points on the object to be detected are within the range of the potential safety hazard distance. At this time, it is considered that the object to be detected blocks the light path of the optical machine 200, and a fire or the like is easily caused within the range of the potential safety hazard distance. From another perspective, when both L3 and L4 are greater than the larger of L1 and L2, it is indicated that the object to be detected is outside the safety hazard distance range.

In some embodiments, as shown in fig. 5, in this embodiment, a distance L3 of a first detection point P on the object 20 to be detected is detected by using the distance sensor 300, and a horizontal included angle of L3 with respect to the optical machine 200 can be obtained as α, at this time, a vertical distance D0 of the object 20 to be detected from the optical machine 200 can be obtained by calculation, specifically, D0 — L3 — sin α, at this time, D0 can be used as a preset safety distance, and a first actual safety distance L1 and a second actual safety distance L2 of the barrier are calculated according to the preset safety distance D0, the distance L between the distance sensor 300 and the optical machine 200, and the projection angle θ of the optical machine 200; the safety hazard distance range is less than or equal to the larger value of the L1 and the L2, namely, the safety can be judged only if the actual distance between the object 20 to be detected and the distance sensor 300 is greater than the larger value of the L1 and the L2;

wherein the first actual safety

Second actual safe distance

It should be understood that the distance between two detected points on the object 20 to be measured is less than or equal to the diameter of the projection area M0 of the optical machine 200 at the preset safety distance. At this time, subsequently, acquiring actual distances L3 and L4 between two points on the object 20 to be measured and the optical machine 200, comparing L3, L1 and L2, and determining that L3 is less than or equal to L1 or less than or equal to L2; comparing L4 and L1 to L2, it was determined that L4 is less than or equal to L1, alternatively, less than or equal to L2. Specifically, in the present embodiment, the distance L3 (the distance between the distance sensor 300 and the first detection point P) at the first detection point P on the object 20 to be detected, and the distance L4 (the distance between the distance sensor 300 and the second detection point Q) at the second detection point Q on the object 20 to be detected are detected by the distance sensor 300. Comparing L3 with L1 and L2 respectively, and when L3 is less than or equal to L1 or L2, indicating that the point P is in the range of potential safety hazards; comparing L4 with L1 and L2 respectively, and when L4 is less than or equal to L1 or L2, indicating that the Q point is within the range of the potential safety hazard distance; at this time, it is indicated that at least two points on the object to be detected are within the range of the potential safety hazard distance. At this time, it is considered that the object to be detected blocks the light path of the optical machine 200, and a fire or the like is easily caused within the range of the potential safety hazard distance. From another perspective, when both L3 and L4 are greater than the larger of L1 and L2, it is indicated that the object to be detected is outside the safety hazard distance range.

In some embodiments, to further improve the accuracy of the detection and judgment, before the step of turning off the light source of the optical machine 200, the method further includes:

acquiring the maintaining time of the actual distance in the range of the potential safety hazard distance;

and when the maintaining time length is determined to be greater than or equal to the preset time length, the light source of the optical machine 200 is turned off.

Specifically, in the embodiment, if the time for the shielding object to shield the optical engine 200 is short, it is considered that the light source of the optical engine 200 is not enough to make the shielding object reach the ignition point in the short time. That is, instead of immediately turning off the light source of the light engine 200 when a blockage is detected, the timer 800 or other means is used to calculate the length of time that the blockage is within the safety hazard distance range. When the maintaining time length of the shielding object within the potential safety hazard distance range is greater than or equal to the preset time length, the shielding object is considered to have the risk of reaching the ignition point. At this time, the light source of the optical machine 200 should be turned off to avoid safety accidents.

acquiring the current temperature of the object 20 to be measured;

and determining that the current temperature of the object 20 to be measured is higher than the preset safe temperature, and turning off the light source of the optical machine 200.

Specifically, in this embodiment, in order not to affect the use of the projector 10, the temperature of the object 20 to be measured in front of the projector 10 is detected, and if the current temperature of the object 20 to be measured is less than or equal to the preset safe temperature, it indicates that the temperature of the blocking object is not high, and the blocking object is not burned, and is still in a safe state, and the optical engine 200 does not need to be turned off. When the current temperature of the object 20 to be measured is higher than the preset safe temperature, it indicates that the temperature of the blocking object is higher, and there is a potential safety hazard of combustion, and the light source of the optical machine 200 should be turned off. The preset safe temperature can be 90-110 ℃, for example 100 ℃. There are many ways to obtain the temperature, such as by temperature sensor 700. The temperature sensor 700 can be an infrared temperature measurement sensor module, and the highest temperature measurement range can meet the requirement at 110 ℃.

In some embodiments, in order to prompt the user in time, after the step of determining that the actual distance is within the range of the safety hazard distance, the method further includes:

and sending out prompt information.

The prompting message can be in many forms, such as short message, light message, sound message, vibration message, etc., and the voice prompt is taken as an example. Of course, in some embodiments, in order to prompt the user more effectively, a combination of the above prompting manners may be used, such as voice broadcasting and flashing the indicator lamp 520. The voice prompt may be performed through the speaker 510, and the played content is stored in the memory 600.

In some embodiments, in order to quickly put the projector 10 into use after the shutter is removed, the step of turning off the light source of the light machine 200 further includes:

and when the actual distance is determined to be greater than the safe distance, the light source of the optical machine 200 is turned on again.

And detecting the actual distance of the object 20 to be detected in front, and when the actual distance is greater than the maximum value of the potential safety hazard distance range, indicating that the object 20 to be detected is not in the potential safety hazard distance range, at the moment, considering that the shielding object is moved away, and enabling the projector 10 to work normally and safely. At this time, the projector 10 is turned back on.

The utility model also provides a projector 10, this projector 10 includes memory 600, memory 600 stores the procedure that can realize the overtemperature protection method of switch projection light source, projector 10 can carry out the procedure in memory 600, in order to realize foretell method, the concrete scheme of this switch projection light source's overtemperature protection method refers to above-mentioned embodiment, because this projector 10 has adopted the whole technical scheme of above-mentioned all embodiments, consequently have all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, no longer give unnecessary details here.

The projector 10 comprises a main control circuit 100, a temperature sensor 700, a loudspeaker 510 and a timer 800; the distance sensor 300, the temperature sensor 700, the speaker 510, and the timer 800 of the projector 10 are electrically connected to the main control circuit 100.

The utility model discloses further provide a projector 10, this projector 10 includes:

a light engine 200, the light engine 200 comprising a light source;

the distance sensor 300 is arranged close to the optical machine 200, and is used for detecting the distance between the object 20 to be detected in front of the optical machine 200 and the distance sensor 300;

the temperature sensor 700 is arranged close to the optical machine 200 and used for detecting the temperature of the object 20 to be detected in front of the optical machine 200;

the main control circuit 100 is electrically connected to the optical machine 200, the distance sensor 300 and the temperature sensor 700, and turns on or off the light source of the optical machine 200 according to the data detected by the distance sensor 300 and the temperature sensor 700.

Specifically, in the present embodiment, the distance sensor 300 and the temperature sensor 700 are arranged along the circumferential direction of the optical machine 200 and are both disposed close to the optical machine 200. The temperature sensor 700 and the distance sensor 300 are both disposed on the housing of the projector 10, so that the distance and the temperature of the object to be detected in front of the light machine 200 can be directly detected. The distance sensor 300 and the temperature sensor 700 convert the detected data into currents or voltages of different intensities. The main control circuit 100 receives the parameters sent by the distance sensor 300 and the temperature sensor 700, that is, receives the currents or voltages with different intensities. The temperature sensor 700 operates when the transmitted current or voltage of the distance sensor 300 triggers the circuit of the temperature sensor 700 in the main control circuit 100. The main control circuit 100 receives the detection parameter sent by the temperature sensor 700, and when the current or voltage intensity reaches a preset intensity, the main control circuit 100 is triggered to control the optical machine 200 to turn on or turn off the light source. Specifically, how to control may refer to the above embodiments, and details are not repeated.

In some embodiments, in order to improve the accuracy of turning on and off the light source of the optical engine 200, the projector 10 further includes a timer 800, the timer 800 is electrically connected to the main control circuit 100, and the timer 800 is used for calculating the time length for maintaining the current position of the object 20 to be measured in front of the optical engine 200.

In some embodiments, in order to timely remind the user of paying attention to the working state of the projector 10, the projector 10 further includes a speaker 510 and a memory 600, the speaker 510 and the memory 600 are connected to the main control circuit 100, the speaker 510 is used for voice broadcast, and the memory 600 is used for storing data of the voice broadcast. In order to facilitate the user to hear the voice content broadcasted by the speaker 510, the projector 10 includes a housing, and the speaker 510 is disposed on the housing.

In some embodiments, in order to timely remind the user of the working state of the projector 10, the projector 10 further includes an indicator lamp 520, and the indicator lamp 520 is electrically connected to the main control circuit 100. In order to facilitate the user to notice the projector 10 in time, the projector 10 includes a housing, and the indicator light 520 is disposed on a surface of the housing, which is adjacent to or opposite to a surface of the light engine 200 emitting light. In this manner, the indicator light 520 is advantageously visible to the user.

In some embodiments, in order to timely remind the user of paying attention to the working state of the projector 10, the projector 10 further includes an information sending device and a memory 600, the information sending device and the memory 600 are connected to the main control circuit 100, the information sending device is configured to send out information, and the memory 600 is configured to store data of the information. The information sending device can send information to a specified mobile terminal, such as a mobile phone, and can also send the information to terminal equipment, such as a display screen.

In some embodiments, the distance sensor 300 is disposed at an upper edge region of the optical machine 200, and a center of the distance sensor 300 and a center of the optical machine 200 are on the same horizontal vertical line, since a projection region of the projector is an upward-inclined projection region in a horizontal direction, the distance sensor 300 is disposed at an upper side of the optical machine, the distance sensor 300 can be disposed to detect a front side of the optical machine, and when the distance sensor 300 detects that an actual distance of a point existing on an object to be detected in front of the optical machine is smaller than a safety distance, the optical machine can be considered to be shielded by the distance sensor 300, so that the distance sensor 300 can be used to perform simple one-time distance measurement on the object to be detected in front of the optical machine.

In some embodiments, the temperature sensor 700 is disposed at the upper edge region of the optical machine 200, and the center of the temperature sensor 700 and the center of the optical machine 200 are on the same horizontal vertical line, under normal circumstances, the light at the center of the optical machine is stronger, and then, the temperature at the center is higher than that at the side, so that the temperature sensor 700 can detect the temperature right in front of the optical machine, which can reduce the detection range of the temperature sensor 700, and can obtain the highest problem of the object to be detected to a certain extent, thereby facilitating timely processing.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims

1. A projector, characterized in that the projector comprises:

a light engine comprising a light source;

2. The projector according to claim 1, further comprising a timer electrically connected to the main control circuit, wherein the timer is used for calculating a duration of time for the object to be measured in front of the optical engine to maintain the current position.

3. The projector according to claim 1, further comprising a speaker and a memory, the speaker and the memory being connected to the main control circuit, the speaker being used for voice broadcast, the memory being used for storing data of the voice broadcast.

4. The projector as defined in claim 3 wherein the projector includes a housing, the speaker being disposed on the housing.

5. The projector as defined in claim 1, further comprising an indicator light, the indicator light being electrically connected to the master control circuit.

6. The projector as defined in claim 5 wherein the projector includes a housing, the indicator light being disposed on a surface of the housing adjacent to or opposite a surface of the light engine from which the light engine emits light.

7. The projector as defined in any one of claims 1 to 6, wherein the distance sensor and the temperature sensor are arranged along a circumferential direction of the optical engine.

8. The projector as claimed in claim 7, wherein the distance sensor is disposed at an upper edge region of the optical engine, and a center of the distance sensor and a center of the optical engine are on a same horizontal vertical line.

9. The projector as claimed in claim 7, wherein the temperature sensor is disposed at an upper edge region of the optical engine, and a center of the temperature sensor and a center of the optical engine are on a same horizontal vertical line.

10. The projector according to any one of claims 1 to 6, further comprising an information sending device and a memory, wherein the information sending device and the memory are connected with the main control circuit, the information sending device is used for sending out information, and the memory is used for storing data of the information.