CN212413327U - Projector capable of preventing strong light from mistakenly irradiating human eyes - Google Patents
Projector capable of preventing strong light from mistakenly irradiating human eyes Download PDFInfo
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- CN212413327U CN212413327U CN202021651470.1U CN202021651470U CN212413327U CN 212413327 U CN212413327 U CN 212413327U CN 202021651470 U CN202021651470 U CN 202021651470U CN 212413327 U CN212413327 U CN 212413327U
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- imaging lens
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- projection lamp
- infrared receiver
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Abstract
The utility model discloses a prevent that highlight mistake from penetrating projecting apparatus of people's eye, wherein, through other infrared transmitter and the infrared receiver that sets up of imaging lens at the projecting apparatus, the contrast module contrast of controller calculates the infra-red signal of infra-red transmitter transmission and the change condition between the infra-red signal that infrared receiver received, then the controller is with the luminance of passing through light adjusting module regulation projection lamp according to this change condition, thereby in time adjusting the luminance of projection lamp weak when someone appears in imaging lens the place ahead, prevent that the strong light from shining people's eye, harm eyesight.
Description
Technical Field
The utility model relates to a projecting apparatus technical field, in particular to prevent that highlight mistake from penetrating projecting apparatus of people's eye.
Background
A projector is a device that can project images or videos onto a curtain. Projectors are widely used in homes, offices, schools, and entertainment places due to their convenience. However, when the projector is used, there is a possibility that the lens of the projector is directly viewed by human eyes and the strong light causes visual impairment. In the prior art, the main technical processing methods for solving the problem include the following steps:
1. a front camera is installed to capture a picture in front of a projector in real time, and when human eyes or human faces are judged through a local CPU or a cloud face recognition algorithm, a light source of the projector is cut off.
2. As the human body fixedly emits infrared light with the wavelength of 10 mu m, when the human body is monitored, the light source of the projector is cut off by installing an infrared receiver or an infrared camera for monitoring the specific wavelength.
However, such a method also leads to the following problems:
1. in some teaching and meeting scenes, people are required to stand near a projection picture, namely people can stand in front of a front camera or a sensor of a projector, so that the misoperation of closing a projection light source is easily caused.
2. The front camera has higher cost.
3. The built-in high-configuration CPU and the cloud algorithm are limited by an intelligent platform and a wireless routing network, and higher cost is needed.
4. The algorithm is complex, the system reaction time is long, and the significance of protecting the eyesight in time is lost.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims at providing a prevent that highlight mistake from penetrating projecting apparatus of people's eye, make its low cost, reaction time fast, the rate of accuracy is high, suitable platform is extensive.
In order to achieve the above object, the utility model provides a prevent that highlight mistake from penetrating projecting human eye's projecting apparatus, include:
the projection lamp comprises a shell, wherein an imaging lens and a projection lamp are arranged in the shell, and the imaging lens is arranged on the surface of the shell;
the infrared emitter is arranged on one side of the imaging lens and used for emitting an infrared signal;
the infrared receiver and the infrared transmitter are arranged on the same side of the imaging lens and are used for receiving infrared signals transmitted by the infrared transmitter;
the controller, the controller includes contrast module and light adjustment module, the contrast module is connected infra-red transmitter with infrared receiver is used for the contrast the infrared signal of infra-red transmitter transmission with the infrared signal that infrared receiver received, light adjustment module connects the projection lamp is used for adjusting the luminance of projection lamp.
Optionally, the infrared emitter is disposed between the imaging lens and the infrared receiver.
Optionally, the distance from the infrared emitter to the edge of the imaging lens is greater than the distance from the infrared emitter to the infrared receiver.
Optionally, the controller is a single chip microcomputer or a CPU.
The utility model discloses technical scheme is through setting up infrared emitter and infrared receiver by the imaging lens at the projecting apparatus, and the contrast module contrast of controller calculates the infra-red signal of infra-red emitter transmission and the change situation between the infra-red signal that infrared receiver received, then the controller is with the luminance of adjusting the projection lamp through light adjusting module according to this change situation to the luminance of projection lamp is in time transferred weak when someone appears in projection lamp the place ahead, prevents the strong light from shining people's eye, harm eyesight.
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 view of an imaging structure of a projector for preventing glare from misemitting human eyes;
FIG. 2 is a schematic diagram of an external structure of the projector for preventing glare from misdirecting toward human eyes;
FIG. 3 is a schematic diagram of the internal circuit connection structure of the projector for preventing glare from misemitting to human eyes;
FIG. 4 is a schematic view of the working process of the projector for preventing glare from misdirecting toward human eyes;
fig. 5 is a schematic diagram of an embodiment of the present invention for illustrating the variation of the received signal strength;
fig. 6 is a schematic diagram of another embodiment of the present invention for changing the received signal strength;
fig. 7 is a diagram illustrating another embodiment of the present invention for changing the received signal strength.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 1 | |
8 | |
| 2 | |
9 | Uniform light |
| 3 | |
10 | Light- |
| 4 | |
11 | |
| 7 | Imaging |
20 | Shell body |
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, if the specific posture is changed, the directional indicator is changed accordingly.
In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to 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, 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 provides a prevent that highlight mistake from penetrating projecting apparatus of people's eye, this projecting apparatus can in time adjust light intensity according to infrared signal's change, prevents that projector lamp light shines people's eye.
Referring to fig. 1 to 7, fig. 1 is a schematic diagram of an imaging structure of a projector for preventing glare from misemitting human eyes; FIG. 2 is a schematic diagram of an external structure of the projector for preventing glare from misdirecting toward human eyes; FIG. 3 is a schematic diagram of the internal circuit connection structure of the projector for preventing glare from misemitting to human eyes; FIG. 4 is a schematic view of the working process of the projector for preventing glare from misdirecting toward human eyes; fig. 5 is a schematic diagram of an embodiment of the present invention for illustrating the variation of the received signal strength; fig. 6 is a schematic diagram of another embodiment of the present invention for changing the received signal strength; fig. 7 is a diagram illustrating another embodiment of the present invention for changing the received signal strength.
In an embodiment of the present invention, please refer to fig. 1-2, which provides a projector for preventing glare from misshooting human eyes, comprising: the projection lamp comprises a shell 20, wherein an imaging lens 1 and a projection lamp 11 are arranged in the shell 20, and the imaging lens 1 is installed on the surface of the shell 20; the infrared emitter 2 is arranged on one side of the imaging lens 1, and the infrared emitter 2 is used for emitting an infrared signal; the infrared receiver 3 and the infrared emitter 2 are arranged on the same side of the imaging lens 1, and are used for receiving infrared signals emitted by the infrared emitter 2; the controller, the controller includes contrast module and light adjustment module, the contrast module is connected infra-red transmitter 2 with infrared receiver 3 for the contrast the infrared signal of 2 launches of infra-red transmitter with the infrared signal that infrared receiver 3 received, light adjustment module connects projecting lamp 11 is used for adjusting the luminance of projecting lamp 11.
The utility model discloses technical scheme is through setting up infrared emitter 2 and infrared receiver 3 by imaging lens 1 at the projecting apparatus, the contrast module contrast of controller calculates the situation of change between the infrared signal of 2 transmission of infrared emitter and the infrared signal that 3 receptions of infrared receiver, then the controller is with the luminance of passing through light adjusting module according to this situation of change and adjusting projection lamp 11, thereby in time adjust weak projection lamp 11's luminance when someone appears in imaging lens 1 the place ahead, prevent the strong light from shining people's eye, harm eyesight.
Specifically, referring to fig. 1, the imaging structure of the projector for preventing the strong light from being misdirected to the human eye comprises a projection lamp 11, a light-gathering cup 10, a light-equalizing fresnel mirror 9, a projection screen 8, an imaging fresnel mirror 7, a reflective mirror 4 and an imaging lens 1. It is understood that the imaging structure is not limited thereto, and the imaging structure may be any conventional projector imaging structure, and may have more or less imaging structures than those in the embodiment, and the structure thereof will not be described in detail herein since the imaging structure is not the inventive point of the present invention.
Specifically, the projection lamp 11 is preferably an LED light source, which emits light uniformly and has high brightness, and the light source of the projection lamp 11 may be a halogen lamp light source, a metal halide lamp light source, or the like.
Specifically, the light source of the projection lamp 11 is projected by the imaging lens 1 after being imaged by the imaging system, so that the light source of the projector is emitted from the imaging lens 1, and thus it can be understood that the infrared emitter 2 and the infrared receiver 3 are disposed at one side of the imaging lens 1, please refer to fig. 2, so that when a person or an object appears in front of the imaging lens 1, the infrared signal received by the infrared receiver 3 is affected at the same time, thereby adjusting the brightness of the light source.
Specifically, please refer to fig. 3, fig. 3 is the internal circuit connection structure diagram of the projector for preventing the strong light from irradiating the human eyes of the present invention, the infrared emitter 2 and the infrared receiver 3 are connected to the comparison module of the controller, and the light adjustment module of the controller is connected to the projection lamp 11. The infrared emitter 2 continuously emits infrared signals, and the infrared receiver 3 receives the infrared signals. The infrared receiver 3 converts the received infrared signal into a digital signal according to the strength of the received infrared signal, and transmits the digital signal to an internal controller, wherein the controller can be a single chip microcomputer or a CPU. The controller controls the brightness of the projection lamp 11 through operation and logic judgment.
Specifically, referring to fig. 4, in order to improve the control accuracy of the controller, the controller is specifically configured to determine whether a person passes in front of the imaging lens 1 according to the "sudden change of intensity" of the received infrared signal, and further control the light intensity of the projection lamp 11, for example, if the infrared signal received by the infrared receiver 3 suddenly changes by more than 10%/second, it is determined that a person passes, and the light intensity of the projection lamp 11 is attenuated.
In detail, please refer to fig. 5-7, fig. 5-7 are the operation states of the projector for preventing glare from misdirecting to human eyes in different scenes, respectively.
As shown in fig. 5, when the distance from the projector to the curtain is not changed, the intensity of the infrared signal received by the infrared receiver 3 is not changed, and at this time, the controller determines that the projector is working normally, and the luminous intensity of the projection light source LED lamp is not changed.
As shown in fig. 6, when the hand-held projector moves away from the screen or approaches to the screen (for example, the position of the machine needs to be moved when the size of the screen needs to be adjusted), the intensity of the infrared signal received by the infrared receiver 3 is gradually increased to a point B or gradually decreased to a point B', but the change suddenly does not exceed 10%/second, and at this time, the controller determines that the projector works normally, and the light intensity of the projection light source LED lamp does not change.
As shown in fig. 7, when a child or a human face suddenly appears in front of the projection, the intensity of the infrared signal received by the infrared receiver 3 is suddenly increased to a point C or suddenly decreased to a point C' (different shapes and reflectivities of different parts of a human body), the rate of change of the infrared signal exceeds 10%/second, and at this time, the controller judges that the person passes through, and the projection light source LED lamp suddenly becomes dark to an intensity that does not hurt eyes, and then gradually recovers the brightness.
Preferably, referring to fig. 2, the infrared emitter 2 is disposed between the imaging lens 1 and the infrared receiver 3. Thereby, it is possible to prevent the light projected from the imaging lens 1 from affecting the signal received by the infrared receiver 3.
More preferably, referring to fig. 2, the distance from the infrared emitter 2 to the edge of the imaging lens 1 is greater than the distance from the infrared emitter 2 to the infrared receiver 3. Therefore, the light projected by the imaging lens 1 can be ensured not to influence the signal received by the infrared receiver 3, and the accuracy is improved.
The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims (4)
1. A projector for preventing glare from misdirecting a person's eye, comprising:
the projection lamp comprises a shell (20), wherein an imaging lens (1) and a projection lamp (11) are arranged in the shell (20), and the imaging lens (1) is installed on the surface of the shell (20);
the infrared emitter (2), the infrared emitter (2) is arranged on one side of the imaging lens (1), and the infrared emitter (2) is used for emitting infrared signals;
the infrared receiver (3) and the infrared emitter (2) are arranged on the same side of the imaging lens (1) and used for receiving an infrared signal emitted by the infrared emitter (2);
the controller, the controller includes contrast module and light adjustment module, the contrast module is connected infra-red transmitter (2) with infrared receiver (3) for the contrast the infrared signal of infra-red transmitter (2) transmission with the infrared signal that infrared receiver (3) received, light adjustment module connects projection lamp (11) is used for adjusting the luminance of projection lamp (11).
2. A projector for preventing glare misshores onto the human eye according to claim 1, wherein the infrared emitter (2) is arranged between the imaging lens (1) and the infrared receiver (3).
3. A projector for preventing glare misshores onto human eyes as claimed in claim 2, wherein the distance from the infrared emitter (2) to the edge of the imaging lens (1) is greater than the distance from the infrared emitter (2) to the infrared receiver (3).
4. The projector as claimed in claim 1, wherein the controller is a single chip or a CPU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021651470.1U CN212413327U (en) | 2020-08-07 | 2020-08-07 | Projector capable of preventing strong light from mistakenly irradiating human eyes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021651470.1U CN212413327U (en) | 2020-08-07 | 2020-08-07 | Projector capable of preventing strong light from mistakenly irradiating human eyes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212413327U true CN212413327U (en) | 2021-01-26 |
Family
ID=74371662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021651470.1U Active CN212413327U (en) | 2020-08-07 | 2020-08-07 | Projector capable of preventing strong light from mistakenly irradiating human eyes |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212413327U (en) |
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2020
- 2020-08-07 CN CN202021651470.1U patent/CN212413327U/en active Active
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