WO2021212806A1 - 投影设备及亮度调节方法 - Google Patents
投影设备及亮度调节方法 Download PDFInfo
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- WO2021212806A1 WO2021212806A1 PCT/CN2020/126838 CN2020126838W WO2021212806A1 WO 2021212806 A1 WO2021212806 A1 WO 2021212806A1 CN 2020126838 W CN2020126838 W CN 2020126838W WO 2021212806 A1 WO2021212806 A1 WO 2021212806A1
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- brightness
- light source
- projection device
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- change
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2053—Intensity control of illuminating light
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- This application relates to the field of projection technology, and in particular to a projection device and a brightness adjustment method.
- a projection device is a device that can project images or videos onto the screen.
- miniature projection equipment as the name implies, it is a miniaturized and portable projection equipment that can facilitate users to move during the projection process so that images or videos can be projected to different directions. Because of this, miniature projection equipment is widely used. application.
- the application scenarios within the projection range of the micro-projection device are constantly changing. For example, in a conference room, when a user moves a micro-projection device, its projection light source is easily projected on the conference personnel, various display items, and so on. Since the light of the projection light source is strong, it may cause harm to the human eye if it is directed at the human eye. At present, most of the micro-projection devices are provided with texts such as "light source is harmful to human eyes" to warn users, but it is still unavoidable that the projection light source directly hits human eyes during the movement of the micro-projection device.
- an embodiment of the present application discloses a projection device, the projection device includes: a sensor; a light source; a controller, the controller is respectively connected to the light source and the sensor, and the controller is configured to :
- the brightness of the light source is adjusted to a preset brightness, wherein the preset brightness is less than the brightness during normal projection.
- an embodiment of the present application discloses a brightness adjustment method, and the method includes:
- the change of the induction signal represents the movement of the projection device; in response to the change of the induction signal, adjust the brightness of the light source to a preset brightness, wherein the preset brightness is less than that during normal projection brightness.
- an embodiment of the present application discloses a brightness adjustment method, and the method includes:
- Detect the movement of the projection device when the projection device moves, control the brightness of the light source of the projection device according to the preset brightness, so that the brightness of the light source is less than the brightness during normal projection; in the projection device When there is no movement, the brightness of the light source of the projection device is controlled according to the brightness data in the image signal.
- an embodiment of the present application discloses a brightness adjustment method, and the method includes:
- Detect the movement of the projection device when the projection device moves, control the brightness of the light source of the projection device according to the preset brightness and the brightness data in the image signal at the same time, so that the brightness of the light source is reduced; When the projection device does not move, the brightness of the light source of the projection device is controlled according to the brightness data in the image signal.
- an embodiment of the present application discloses a brightness adjustment method, and the method includes:
- Detect the movement of the projection device when the projection device moves, control the brightness of the light source of the projection device according to the preset weight and the brightness data in the image signal at the same time, so that the brightness of the light source is reduced; When the projection device does not move, the brightness of the light source of the projection device is controlled according to the brightness data in the image signal.
- an embodiment of the present application discloses a brightness adjustment method, and the method includes:
- the color data controls the number of imageable pixels in the imaging element.
- an embodiment of the present application discloses a brightness adjustment method, and the method includes:
- Detect the movement of the projection device when the projection device moves, reduce the number of imageable pixels in the imaging element and reduce the brightness of the light source, so that the user's visible brightness is lower than the user's visible brightness corresponding to the image signal;
- the projection device is not moving, the number of imageable pixels in the imaging element and the brightness of the light source are controlled according to the image signal.
- FIG. 1 is a working sequence diagram of a projection device provided by an embodiment of the application
- FIG. 2 is a schematic flowchart of a brightness adjustment method provided by an embodiment of the application.
- Fig. 3 is a schematic diagram of the flow of adjusting the brightness of the light source in Fig. 2;
- FIG. 4 is a schematic diagram of another light source brightness adjustment process in FIG. 2.
- the micro-projection device in the projection device since the micro-projection device has mobile portability, it is often moved by the user during use. For example, moving from one meeting room to another meeting room, or changing the projection position in the meeting room, and so on. As the application scene changes, the projection direction of the light source in the micro-projection device is constantly changing. In order to prevent the light source from directly illuminating the eyes of the user and causing harm to the eyes of the user, an embodiment of the present application provides a projection device.
- the projection device includes a controller, and light sources and sensors respectively connected with the controller.
- FIG. 1 is a working sequence diagram of the projection device provided in this embodiment of the application.
- the working process of the projection device in this application is as follows:
- the controller, sensor, and light source are all turned on. Later, during the working process of the projection device, the controller turns on the protection function, that is, it senses whether the projection device is moving through the sensor. Once the user changes the position of the projection device, the sensor can perceive the change in the position of the projection device. During the operation of the sensor, the controller monitors the sensing signal of the sensor in real time to obtain whether the position of the projection device changes. When the position of the projection device changes, the sensing signal measured in the sensor changes, and then the controller adjusts the brightness of the light source to a preset brightness.
- a brightness adjustment method provided by an embodiment of this application.
- the controller in the projection device is configured to perform the brightness adjustment process in FIG. 2.
- the brightness adjustment process in this application includes the following steps:
- S201 Detect a change in the sensing signal sent by the sensor, where the change in the sensing signal represents the movement of the projection device.
- the sensor in the present application monitors the position change of the projection device in real time. Once the position of the projection device changes, the sensing signal monitored by the sensor changes accordingly, and the sensor sends the sensing signal monitored by itself to Controller.
- the controller receives the sensing signal sent by the sensor, and detects the change of the sensing signal.
- the change of the sensing signal can indicate whether the projection device is moving. For example, when the user moves the projection device, the gravity data of the projection device sensed by the sensor will inevitably change. Therefore, the controller can determine whether the projection device moves or not based on the change in the gravity data of the projection device sensed by the sensor.
- the senor may be at least one of different signal collection devices such as a gravity sensor, an infrared sensor, and an image sensor.
- the movement of the object can be monitored by a gravity sensor.
- the movement of objects can also be monitored by infrared sensors.
- the change in the distance between the infrared sensor and the support (or the wall or the projection screen) is monitored, and when the distance changes, the projection device moves.
- the change of the support is monitored by the image sensor, and when the change occurs, the projection device moves.
- the controller may receive the sensing signal of the sensor to determine whether the projection device is moving.
- S202 In response to a change in the sensing signal, adjust the brightness of the light source to a preset brightness, where the preset brightness is less than the brightness during normal projection.
- the controller when the controller detects that the sensing signal monitored by the sensor changes, it means that the projection device is moving. Then, in this application, the controller reduces the brightness of the light source to make it smaller than that during normal projection. Brightness will not make users feel glare.
- the preset brightness is less than the brightness during normal projection, that is, the present application reduces the brightness of the light source so that even if the light source directly shines on the user's eyes, the brightness of the light will not be dazzling and will not be irritating to the user. Harm to eyes.
- the minimum preset brightness can be reduced to 0, that is, the light source is directly turned off. It should be noted that turning off the light source does not turn off the projection device. The projection device is still in the power-on state, and only the light source is turned off to avoid irradiating the user's eyes.
- the brightness of the light source of the projection device is controlled according to the brightness data in the image signal, and the brightness of the light source can be controlled by the magnitude of the power supply driving current.
- the brightness of the light source when the projection device moves, can be controlled according to the preset brightness, and the brightness of the light source can also be controlled simultaneously according to the preset brightness and the brightness data in the image signal.
- simultaneously controlling the light source and controlling the brightness of the light source according to the preset brightness and the brightness data in the image signal may be to assign respective weights to the two parameters, and then to control the brightness of the light source according to the weighted data.
- the weighting algorithm and formula can be set according to actual needs, as long as the visible brightness of the projection device is reduced to the planned brightness.
- the brightness of the light source when the projection device moves, the brightness of the light source may be controlled according to the preset weight and the weighting from the brightness data in the image signal, so that the brightness of the weighted light source is lower than the brightness of the light source before weighting.
- the imaging element in the projection device when the projection device moves, can be controlled according to the color data in the image signal to control the brightness that is visible to the user.
- the imaging element in the projection device is controlled according to the color data in the image signal to control the brightness visible to the user, which can be based on the color data, controlling the imaging element to reduce the number of imageable pixels, or directly turning off the imaging element (Even if all pixels are not available for imaging), the imaging refers to reflecting/projecting light from a light source to make the pixel appear on the projection screen.
- controlling the imaging element to reduce the number of imageable pixels may be controlling the imaging element to uniformly reduce the number of imaged pixels in the pixel matrix to avoid local glare.
- controlling the imaging element to reduce the number of imageable pixels may be to control the imaging element to uniformly reduce the number of imaged pixels in a high-brightness area to avoid local glare.
- controlling the number of imageable pixels in the imaging element and controlling the brightness of the light source can be used in combination or independently of each other.
- Fig. 3 is a schematic diagram of the process of adjusting the brightness of the light source in Fig. 2. Combined with Figure 3, the adjustment process of the light source brightness is as follows:
- S301 In response to a change in the sensing signal, determine a changed sensing signal value
- the sensing signal can be the gravity value sensed by the gravity sensor, or the speed value sensed by the speed sensor, where the speed value can be calculated using the three-dimensional parameters output by the gyroscope, or It is the other way.
- the controller determines the changed sensing signal value through the detected change of the sensing signal, and judges the degree of movement of the projection device by the size of the changed sensing signal value.
- S302 Adjust the brightness of the light source to a brightness value corresponding to the changed sensing signal value according to the changed sensing signal value and a preset mapping relationship.
- the preset brightness includes a plurality of brightness values, and the plurality of brightness values correspond to a plurality of sensing signal values one-to-one, and the corresponding relationship between the sensing signal value and the brightness value is represented by the preset mapping relationship, and the mapping relationship is different.
- the brightness value corresponds to different sensing signal values.
- the brightness of the light source is adjusted to a brightness corresponding to the degree of gravity change.
- the degree of gravity change is the magnitude of the change in gravity value monitored by the sensor.
- the magnitude of the sensing signal value is related to the movement range of the projection device. During the movement process, the greater the movement amplitude, the greater the change in gravity value, and the greater the sensor signal value after the change can be monitored by the sensor. On the contrary, the smaller the movement amplitude, the smaller the change in gravity value.
- the sensor can detect the smaller the value of the induced signal after the change.
- the value of gravity is from 0 to 10
- the value of gravity is from 0 to 15.
- the sensor signal value after the change of the latter is large, that is, the degree of gravity change is high, so the brightness value corresponding to the latter is smaller than the brightness corresponding to the former value.
- a user when a user is in a meeting room and wants to adjust the projection area on the projection surface, for example, move the projection area from the upper left corner of the projection surface to the upper right corner, or change the projection surface, that is, the projection surface Move from one wall of the meeting room to the other.
- the user only needs to adjust the projection device on a specific area (conference table) to change the projection direction of the projection device.
- the movement range of the projection device is small, and the degree of gravity change is also small. , That is, the changed sensing signal value is small, so the probability of the light source directly hitting the user's eyes is relatively small. At this time, the brightness of the light source can be slightly reduced.
- the user when a user needs to transfer a meeting room, that is, from one meeting room to another meeting room, the user needs to carry the projection device to move around.
- the gravity change degree is also smaller, that is, the sensor signal value after the change is larger, especially in the subsequent movement process, the probability of scanning the user’s eyes is relatively large, then the light source’s The brightness is greatly reduced, and even the light source is turned off.
- the brightness of the light source is adjusted to a brightness corresponding to the degree of the speed change.
- the degree of speed change is the size of the speed value change detected by the sensor.
- the size of the sensing signal value is related to the instantaneous speed of the projection device. During the movement of the device, if the user gently picks and places the projection device, the speed value changes less, and the sensor can monitor the changed induction signal value is smaller. On the contrary, if the user picks and places the projection device quickly, the speed value changes. Larger, the sensor can monitor the changed sensing signal value is larger. In this application, the larger the sensing signal value, the smaller the brightness value in the preset brightness, the smaller the sensing signal value, the larger the brightness value in the preset brightness.
- FIG. 4 is a schematic diagram of another light source brightness adjustment process in FIG. 2.
- the adjustment process of the light source brightness can also be as follows:
- S401 Determine the rate of change of the sensing signal in response to the change of the sensing signal.
- S402 Adjust the brightness of the light source to a brightness value corresponding to the rate of change of the sensing signal according to the rate of change of the sensing signal and a preset mapping relationship.
- the preset brightness includes multiple brightness values, and the corresponding relationship between the change rate of the sensing signal and the brightness value is represented by the preset mapping relationship, and different brightness values in the mapping relationship correspond to the change rate of different sensing signals.
- the change rate of the sensing signal of the projection device may be faster or slower.
- the gravity value of the projection device also changes from 0 to 10, but some changes from 0 to 10 in 1 second, and some from 1 to 10 in 5 seconds. In comparison, it is obviously The change rate of the gravity value of the former is relatively large. Therefore, in the projection device provided by the embodiment of the present application, when the gravity value of the projection device changes, the brightness of the light source is adjusted to a brightness value corresponding to the rate of change of the gravity value.
- the change rate of the gravity value is larger, the brightness decay rate of the light source is faster, and when the change rate of the gravity value is smaller, the brightness decay rate of the light source is slower.
- the present application quickly reduces the brightness of the light source to achieve the function of reducing the brightness of the light source in time and protecting human eyes.
- the projection device in this application can adjust the brightness of the light source to the preset brightness in time according to the change of the position, which has achieved the effect of not causing damage to human eyes during the movement of the projection device.
- the sensor when the brightness of the light source is adjusted to the preset brightness, the sensor may be turned off.
- the position of the projection device changes at the beginning, it immediately reduces the brightness of the light source to the preset brightness.
- the brightness of the light source will no longer make the human eye feel uncomfortable, and there is no need to change the movement of the projection device. monitor.
- a user wants to transfer a miniature projection device from one conference room to another conference room.
- the sensor senses that its position changes, and the controller detects the change in the gravity value, and immediately turns the light source
- the brightness of is adjusted to the preset brightness. If the user is holding the projection device and moving continuously, then there is no need to monitor the position change of the projection device during this period.
- the projection device when the projection device is moved, that is, after the user places the projection device in a new place, and the user is ready to continue projecting the screen, if the projection device receives a recovery instruction input by the user, the light source is controlled to return to normal
- the brightness during projection is the brightness when the light source is adjusted to normal projection.
- the user can issue a recovery instruction by manipulating the button on the projection device that controls the light source. For example, if the previous preset brightness is set to 0, that is, the light source is turned off after a subsequent position change, then the light source can be switched on The button directly turns on the light source. If the previous preset brightness setting is not 0, that is, only the brightness of the light source is reduced in the subsequent, then the light source can be adjusted through the brightness control button of the light source. Generally there are “+” and "-” control buttons. "+” means increasing the brightness of the light source, and “-” means reducing the brightness of the light source. The user can use the "+” to restore the brightness of the light source to normal projection.
- the user can also use the recovery command issued by the remote control, for example, through the switch button of the light source on the remote control to turn on the light source, or through the "+" and "-" control buttons of the light source on the remote control to adjust The brightness of the light source, "+” means to increase the brightness of the light source, and “-” means to decrease the brightness of the light source.
- the user can quickly restore the brightness of the light source during normal projection by manipulating the button on the projection device that controls the light source, or using the recovery command issued by the remote control.
- the brightness of the light source is gradually increased until the brightness during normal projection is restored.
- the preset time can be 10 minutes, 20 minutes, etc.
- the setting time can be set according to the user's needs, and there is no restriction here. For example, after the user changes the projection position of the projection device in the conference room, or moves the projection device from one conference room to another conference room, the user continues to participate in the conference discussion, and temporarily forgets to send a resume instruction, then After setting the time, the controller controls the brightness of the light source to gradually increase, slowly returning to the brightness during normal projection, so as to avoid delaying the user's use of the projection equipment.
- the controlled light source starts to gradually restore brightness.
- the user finds that the brightness of the light source begins to recover. If the user is still far from the new location, he can manually press the switch button of the light source on the projection device to directly turn off the light source. If the user is close to the new location, and the time for the light source to slowly restore brightness is sufficient for the user to place the projection device in the new location, the user may no longer control the projection device.
- the projection device can also detect whether there is a person in the projection light path of the light source, and restore the brightness of the light source when there is no person.
- the above describes the process of adjusting and controlling the light source by the controller after the position of the micro-projection device is changed.
- the sensor when the brightness of the light source returns to the brightness during normal projection, the sensor is activated.
- the sensor can be restarted at this time to start a new round of protection functions.
- the sensor may not be turned off, that is, the sensor is allowed to work continuously, and the controller also continues to detect the change of the sensing signal sent by the sensor.
- the sensor detects that the projection device is not sending and moving, that is, when the controller detects that the sensing signal is restored to stability, the brightness of the light source is gradually increased until the brightness of the normal projection is restored.
- the application can use a sensor to monitor the position change of the projection device, and once its position changes, the protection mechanism is immediately triggered, that is, the brightness of the light source is adjusted to be less than the brightness during normal projection. Moving the projection device while reducing the brightness of the light source, even if the light source is facing the user, will not make the user feel glare, etc., thereby protecting the user's eyes.
- the present application can protect the eyes of the user while giving full play to the mobile portability of the micro-projection device.
- the embodiments of the present application also provide a brightness adjustment method.
- the method includes the following steps: detecting the change of the induction signal sent by the sensor, and the change of the induction signal represents the movement of the projection device.
- the brightness of the light source is adjusted to a preset brightness, where the preset brightness is less than the brightness during normal projection.
- the controller when the projection device is in use, the controller senses the overall position change of the projection device through the sensor, and the controller detects the sensing signal sensed by the sensor in real time.
- the controller controls the light source to reduce the brightness, that is, adjust the brightness to a preset brightness.
- the preset brightness is less than the brightness during normal projection. The minimum can be set to 0.
- the preset brightness it is Note that when the gravity of the projection device changes, the light source is directly turned off.
- the controller of the present application determines the changed sensing signal value in response to the change of the sensing signal; according to the changed sensing signal value and the preset mapping relationship, adjusts the brightness of the light source to the brightness value corresponding to the changed sensing signal value, where:
- the preset brightness includes a plurality of brightness values, and the preset mapping relationship is a corresponding relationship between a sensing signal value and a brightness value. In the mapping relationship, different brightness values correspond to different sensing signal values.
- the present application can set multiple brightness values in the preset brightness according to the size of the brightness, one brightness value corresponds to a changed sensing signal value, and the brightness of the light source is adjusted to the changed sensing signal value Corresponding brightness, where the changed sensing signal value is related to the moving range of the projection device. For example, there are three brightness values A, B, C, where the brightness value of A is greater than the brightness value of B, and the brightness value of B is greater than the brightness value of C. Then, when the gravity value of the projection device changes from 0 to 10, the light source Adjust the projection brightness of the projection device to C. When the gravity value of the projection device changes from 0 to 20, adjust the projection brightness of the light source to B. When the gravity value of the projection device changes from 0 to 30, adjust the projection brightness of the light source Is A.
- the controller determines the change rate of the sensing signal in response to the change of the sensing signal, and adjusts the brightness of the light source to a brightness value corresponding to the change rate of the sensing signal according to the change rate of the sensing signal and a preset mapping relationship.
- the preset brightness includes multiple brightness values
- the preset mapping relationship is the corresponding relationship between the change rate of the sensing signal and the brightness value
- different brightness values in the mapping relationship correspond to different sensing signal change rates.
- the several different brightness values set in this application can also correspond to different rates of change of the sensing signal respectively, and the brightness of the light source can be adjusted to the brightness corresponding to the rate of change of the sensing signal.
- the gravity value of the projection device also changes from 0 to 10
- the time used is 8 seconds
- the time used is 5 seconds
- adjust the projection brightness of the light source to B if the time used is 3 seconds, adjust the projection brightness of the light source to A.
- the change rate of the sensing signal is larger, the brightness decay rate of the light source is faster.
- the brightness adjustment method in the embodiments of the present application can adjust the brightness of the light source according to the change in the position of the projection device to prevent the light source from causing damage to human eyes during the movement of the projection device. Therefore, the present application can The user's eyes are protected.
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Abstract
一种投影设备及亮度调节方法，投影设备包括：传感器；光源；控制器，控制器分别和光源与传感器连接，控制器被配置为：检测传感器发送的感应信号变化，感应信号的变化表征投影设备发生移动；响应感应信号的变化，将光源的亮度调整至预设亮度，其中，预设亮度小于正常投影时的亮度。在投影设备的重力发生变化后，立即触发保护机制，在降低光源亮度的情况下移动投影设备，即使投影的光源朝向用户，那么也不会让用户感觉到刺眼情况，从而保护了用户的眼睛。该投影设备能够在保护用户的眼睛同时，充分发挥微型投影设备的移动便携性。
Description
本申请要求在2020年04月22日提交中国专利局、申请号为202010320503.2、发明名称为“投影设备及亮度调节方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
本申请涉及投影技术领域，尤其涉及一种投影设备及亮度调节方法。
随着科技的发展，各行各业对投影设备的需求都有所增长。投影设备是一种可以将图像或视频投射到幕布上的设备。对于微型投影设备来说，顾名思义，是一种微小化、便携化的投影设备，能够便于用户在投影过程中进行移动，以使图像或视频投影至不同方向，正因如此，微型投影设备被广泛应用。
在微型投影设备的移动过程中，其投影范围内的应用场景不断变化。例如，在会议室中，用户在移动微型投影设备时，其投影光源容易投向会议人员、各类摆放物品等。由于投影光源的光线较强，如果直射人眼的话，可能对人眼造成危害。目前，在微型投影设备上，大多设置有“光源对人眼有害”等文字，用以警示用户，但是仍无法避免在微型投影设备移动过程中出现投影光源直射人眼的情况。
发明内容
第一方面，本申请实施例公开了一种投影设备，所述投影设备包括：传感器；光源；控制器，所述控制器分别和所述光源与所述传感器连接，所述控制器被配置为：
检测所述传感器发送的感应信号变化，所述感应信号的变化表征所述投影设备发生移动；
响应所述感应信号的变化，将所述光源的亮度调整至预设亮度，其中，所述预设亮度小于正常投影时的亮度。
第二方面，本申请实施例公开了一种亮度调节方法，所述方法包括：
检测传感器发送的感应信号变化，所述感应信号的变化表征投影设备发生移动；响应所述感应信号的变化，将光源的亮度调整至预设亮度，其中，所述预设亮度小于正常投影时的亮度。
第三方面，本申请实施例公开了一种亮度调节方法，所述方法包括：
检测所述投影设备的移动；在所述投影设备发生移动时，根据预设亮度控制所述投影设备的光源的亮度，以使所述光源的亮度小于正常投影时的亮度；在所述投影设备未发生移动时，根据图像信号中的亮度数据控制所述投影设备的光源的亮度。
第四方面，本申请实施例公开了一种亮度调节方法，所述方法包括：
检测所述投影设备的移动；在所述投影设备发生移动时，同时根据预设亮度和图像信号中的亮度数据控制所述投影设备的光源的亮度，以使所述光源的亮度降低；在所述投影 设备未发生移动时，根据图像信号中的亮度数据控制所述投影设备的光源的亮度。
第五方面，本申请实施例公开了一种亮度调节方法，所述方法包括：
检测所述投影设备的移动；在所述投影设备发生移动时，同时根据预设权重和图像信号中的亮度数据控制所述投影设备的光源的亮度，以使所述光源的亮度降低；在所述投影设备未发生移动时，根据图像信号中的亮度数据控制所述投影设备的光源的亮度。
第六方面，本申请实施例公开了一种亮度调节方法，所述方法包括：
检测所述投影设备的移动；在所述投影设备发生移动时，减少成像元件中可成像的像素数量，以使用户可视的亮度降低；在所述投影设备未发生移动时，根据图像信号中的颜色数据控制成像元件中可成像的像素数量。
第七方面，本申请实施例公开了一种亮度调节方法，所述方法包括：
检测所述投影设备的移动；在所述投影设备发生移动时，减少成像元件中可成像的像素数量并降低光源亮度，以使用户可视的亮度低于图像信号对应的用户可视亮度；在所述投影设备未发生移动时，根据图像信号中控制成像元件中可成像的像素数量和光源亮度。
为了更清楚地说明本申请的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，对于本领域普通技术人员而言，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例提供的投影设备的工作时序图；
图2为本申请实施例提供的一种亮度调节方法的流程示意图；
图3为图2中光源亮度调整的流程示意图；
图4为图2中另一光源亮度调整的流程示意图。
为了使本技术领域的人员更好地理解本申请中的技术方案，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本申请保护的范围。
对于投影设备中的微型投影设备来说，由于微型投影设备具有移动便携性，因此其在使用过程中，经常被用户进行移动。例如，从一会议室移动至另一会议室，或者在会议室内改变投影位置等等。上述随着应用场景的改变，微型投影设备中光源的投射方向不断发生变化。为了避免光源直射用户的眼睛，对人眼造成危害，本申请实施例提供了一种投影设备。该投影设备包括控制器，以及分别与控制器连接的光源和传感器。
下面结合附图，对本申请实施例中投影设备进行介绍说明。
参见图1，为本申请实施例提供的投影设备的工作时序图。结合图1，本申请中投影设备的工作过程如下：
在一些实施例中，当投影设备开始投入使用时，控制器、传感器和光源都进行开启。随后，在投影设备的工作过程中，控制器开启了保护功能，也就是通过传感器感知投影设 备是否发生移动。一旦用户将投影设备的位置发生了改变，传感器就能够感知到投影设备的位置变化。在传感器工作的期间，控制器对传感器的感应信号进行实时监测，以得到投影设备是否发生位置变化。当投影设备位置发生变化时，传感器中所测得的感应信号就发生变化，进而控制器就将光源的亮度调整至预设亮度。
参见图2，为本申请实施例提供的一种亮度调节方法。投影设备中的控制器被配置为执行图2中的亮度调节过程，结合图2，本申请中亮度调节过程包括以下步骤：
S201：检测所述传感器发送的感应信号变化，所述感应信号的变化表征所述投影设备发生移动。
在一些实施例中，本申请中的传感器实时监测投影设备的位置变化，一旦投影设备的位置发生变化，传感器所监测到的感应信号就发生相应的变化，传感器将自身监测到的感应信号发送给控制器。控制器接收传感器发送过来的感应信号，并对感应信号的变化进行检测。本申请中，感应信号的变化能够表征投影设备是否发生移动。例如，当用户移动了投影设备，传感器感应到的投影设备的重力数据必然发生变化，因此，控制器可通过传感器感应到的投影设备重力数据的变化来或者投影设备是否发生移动。
在一些实施例中，传感器可以是重力传感器、红外传感器、图像传感器等不同信号采集设备中的至少一种。
在一些实施例中，通过重力传感器可以监测物体的移动。
在一些实施例中，通过红外传感器也可以监测物体的移动。示例性的，监测红外传感器和支撑物(或墙壁或投影屏幕)之间的距离变化，在发生距离变化时，投影设备发生移动。
在一些实施例中，通过图像传感器监测支撑物(或墙壁或投影屏幕)的变化，在发生变化时，投影设备发生移动。
在一些实施例中，控制器可以接受传感器的感应信号，以确定所述投影设备是否发生移动。
S202：响应所述感应信号的变化，将所述光源的亮度调整至预设亮度，其中，所述预设亮度小于正常投影时的亮度。
在一些实施例中，当控制器检测到传感器所监测的感应信号发生变化时，既说明投影设备发生移动，那么，本申请中，控制器通过控制降低光源的亮度，使其小于正常投影时的亮度，也就不会使用户感觉到刺眼等情况。
在一些实施例中，预设亮度小于正常投影时的亮度，也就是说，本申请通过降低光源的亮度，以至于即使光源直射用户的眼睛，其光线亮度也不会刺眼，不会对用户的眼睛造成危害。
在一些实施例中，预设亮度最小可以为降低为0，即直接关闭光源。需要说明的是，关闭光源并没有关闭投影设备，投影设备还处于开机状态中，仅仅是把光源关闭，使其避免照射到用户的眼睛。
在一些实施例中，根据感应信号的变化进行光源亮度调整的方式有多种，以下结合附图介绍几种方式。
在一些实施例中，在投影设备未发生移动时，根据图像信号中的亮度数据来控制投影设备光源的亮度，控制光源的亮度可以通过电源驱动电流的大小来实现。
在一些实施例中，在投影设备发生移动时，可以根据预设亮度来控制光源的亮度，还 可以根据预设亮度和图像信号中的亮度数据来同时控制光源的亮度。
在一些实施例中，根据预设亮度和图像信号中的亮度数据来同时控制光源同时控制光源的亮度可以是为两个参数赋予各自的权重，然后根据加权后的数据进行光源亮度的控制。加权的算法和公式可以根据实际需求设定，只需满足将投影设备可视亮度降低到规划亮度下即可。
在一些实施例中，在投影设备发生移动时，可以根据预设权重和图像信号中的亮度数据来的加权控制光源的亮度，以使得加权后的光源的亮度低于加权前的光源的亮度。
在一些实施例中，在投影设备发生移动时，可以根据图像信号中的颜色数据来控制投影设备中的成像元件来控制用户可视的亮度。
在一些实施例中，根据图像信号中的颜色数据来控制投影设备中的成像元件来控制用户可视的亮度，可以是根据颜色数据，控制成像元件减少可成像的像素数量，或者直接关闭成像元件的输出(即使所有像素均不可用于成像)，所述成像是指将光源光线反射/投射以使得该像素点在投影屏上呈现。
在一些实施例中，控制成像元件减少可成像的像素数量，可以是控制成像元件在像素矩阵中均匀减少成像的像素数量，避免局部的强光。
在一些实施例中，控制成像元件减少可成像的像素数量，可以是控制成像元件在高亮度区域均匀减少成像的像素数量，避免局部的强光。
在一些实施例中，控制成像元件中的可成像的像素数量和控制光源亮度可以组合或相互独立的使用。
参见图3，为图2中光源亮度调整的流程示意图。结合图3，光源亮度的调整过程如下：
S301：响应所述感应信号的变化，确定变化后的感应信号值；
在一些实施例中，感应信号可以是重力感应器感应到的重力值，也可以是速度传感器感应到的速度值，其中，速度值既可以用陀螺仪输出的三维参数实现速度的计算，也可以是其他方式。控制器通过检测到的感应信号的变化，并确定出变化后的感应信号值，通过变化后的感应信号值的大小来判断投影设备移动程度的大小。
S302：根据所述变化后的感应信号值与预设映射关系，将所述光源的亮度调整至对应所述变化后的感应信号值的亮度值。
在一些实施例中，预设亮度包含多个亮度值，多个亮度值与多个感应信号值一一对应，通过预设映射关系表征感应信号值和亮度值的对应关系，在映射关系中不同的亮度值对应不同的感应信号值。
在一些实施例中，当重力发生变化时，将光源的亮度调整为与重力变化程度相对应的亮度。当重力变化的程度越高时，光源的亮度调整的越低，其中，重力变化的程度即为传感器监测到重力值变化的大小，感应信号值的大小与投影设备的移动幅度有关，在投影设备的移动过程中，其移动幅度越大，则重力值变化的越大，传感器所能够监测到的变化后的感应信号值越大，相反，其移动幅度越小，则重力值变化的越小，传感器所能够监测到的变化后的感应信号值越小。本申请中，感应信号值越大，则对应预设亮度中越小的亮度值，感应信号值越小，则对应预设亮度中越大的亮度值。比方说，重力值从0到10，和重力值从0到15，明显后者变化后的感应信号值大，即重力变化的程度高，所以后者所对应的亮度值小于前者所对应的亮度值。
在一些实施例中，当用户在会议室中，想要在投影面上调整投影区域，比方说，将投影区域从投影面的左上角移动至右上角，或者说，更换投影面，即将投影面从会议室的一面墙转移到另一面墙上。在上述应用场景中，用户只需在某一特定区域(会议桌)上将投影设备进行调整以使投影设备的投影方向发生变化，投影设备的移动幅度较小，其重力变化程度也就较小，也就是变化后的感应信号值较小，从而光源直射用户眼睛的几率相对较小，此时，可稍微降低一点光源的亮度。
在一些实施例中，当用户需要转移会议室时，即由一间会议室转移至另一间会议室，此时用户需要携带投影设备进行走动，相对来说，用户在拿起投影设备的瞬间，其移动幅度较大，重力变化程度也就较小，也就是变化后的感应信号值较大，尤其是在后续移动过程中，扫射到用户眼睛的几率相对较大，那么就需将光源的亮度大幅度降低，甚至是关闭光源。
在一些实施例中，当投影设备发生速度变化时，将光源的亮度调整为与速度变化程度相对应的亮度。当速度变化的程度越高时，光源的亮度调整的越高，其中，速度变化的程度即为传感器监测到速度值变化的大小，感应信号值的大小与投影设备的移动瞬时速度有关，在投影设备的移动过程中，用户轻轻取放投影设备，则速度值变化的较小，传感器所能够监测到的变化后的感应信号值较小，相反，用户迅速取放投影设备，则速度值变化的较大，传感器所能够监测到的变化后的感应信号值较大。本申请中，感应信号值越大，则对应预设亮度中越小的亮度值，感应信号值越小，则对应预设亮度中越大的亮度值。
参见图4，为图2中另一光源亮度调整的流程示意图。结合图4，光源亮度的调整过程还可以如下：
S401：响应所述感应信号的变化，确定感应信号的变化率。
S402：根据所述感应信号的变化率与预设映射关系，将所述光源的亮度调整至对应所述感应信号的变化率的亮度值。本申请实施例中，预设亮度包含多个亮度值，通过预设映射关系表征感应信号的变化率和亮度值的对应关系，在映射关系中不同的亮度值对应不同感应信号的变化率。
在一些实施例中，投影设备在移动过程中，其感应信号的变化率有快有慢。比如，投影设备的重力值同样都是从0变化到10，但是有的在1秒内完成了0到10的变化，有的是在5秒内完成1-10的变化，相比较而言，明显是前者的重力值的变化率较大。故本申请实施例提供的投影设备，当投影设备重力值发生变化时，将光源的亮度调整为与重力值的变化率相对应的亮度值。当重力值的变化率越大时，光源的亮度衰减率越快，当重力值的变化率越小时，光源的亮度衰减率越慢。当用户较快的移动投影设备时，本申请通过快速降低光源的亮度，以起到及时降低光源亮度，保护人眼的功能。
在一些实施例中，本申请中投影设备能够根据位置所发生的变化，及时将光源的亮度调整为预设亮度，已达到在投影设备的移动过程中，不会对人眼造成伤害的效果。
在本申请实施例中，当所述光源的亮度调整为所述预设亮度时，可以关闭传感器。投影设备在一开始发生位置变化时，就立即将光源的亮度降低为预设亮度，此时光源的亮度不会再使人眼感觉到不舒服，也就不需要再对投影设备的移动变化进行监测。例如，用户想要将微型投影设备从一会议室转移到另一会议室，当用户一拿起投影设备时，传感器感应到其位置发生变化，控制器检测到重力值的变化，就立即将光源的亮度调整为预设亮度。若是用户拿着投影设备持续进行移动时，那么在此期间无需再对投影设备的位置变化进行 监测。
在一些实施例中，当投影设备移动完毕，即用户将投影设备放置于新的地方之后，且用户准备继续投影画面时，若投影设备接收到用户输入的恢复指令，则控制所述光源恢复正常投影时的亮度，也就是将光源调整为正常投影时的亮度。
在一些实施例中，用户可通过操控投影设备上管控光源的按钮来发出恢复指令，例如，若是之前预设亮度设置为0，也就是后续位置发生变化后关闭了光源，那可以通过光源的开关按钮直接开启光源。若是之前预设亮度设置不为0，也就是后续仅降低了光源的亮度，那可以通过光源的亮度管控按钮来调整光源。一般会有“+”、“-”管控按钮，“+”代表增加光源的亮度，“-”代表降低光源的亮度，用户可通过“+”将光源恢复正常投影时的亮度。
在一些实施例中，用户还可以通过遥控器发出的恢复指令，例如，通过遥控器上光源的开关按钮，来开启光源，或者通过遥控器上光源的“+”、“-”管控按钮来调整光源的亮度，“+”代表增加光源的亮度，“-”代表降低光源的亮度。
在一些实施例中，用户可在确定好微型投影设备的新投影位置之后，通过操控投影设备上管控光源的按钮，或者通过遥控器发出的恢复指令来使光源快速恢复正常投影时的亮度。
在一些实施例中，若在预设时间内没有接收到用户输入的恢复指令，则逐渐增加光源的亮度，直至恢复正常投影时的亮度，预设时间可以为10分钟，20分钟等等，预设时间可根据用户的使用需求自行设置，在此不做限制。例如，当用户在会议室内改变投影设备的投影位置之后，或者将投影设备从一会议室移动至另一会议室之后，用户继续投入到会议讨论中，暂时忘记了需要发送恢复指令，那么在预设时间之后，控制器控制光源的亮度逐渐增加，缓慢恢复至正常投影时的亮度，避免耽误用户对投影设备的使用。
在一些实施例中，若是在预设时间内，用户还没有将投影设备移动至新位置，且控制已控制光源开始逐渐恢复亮度。此时，用户发现光源的亮度开始恢复，若是用户距离新位置还较远，可手动按压投影设备上光源的开关按钮直接关闭光源。若是用户距离新位置较近，光源缓慢恢复亮度的时间足以用户将投影设备放置于新位置，那么用户也可不再操控投影设备。
在一些实施例中，投影设备也可通过检测光源的投影光路中是否有人，在没有人的时候即可恢复光源亮度。
在一些实施例中，以上描述了在根据微型投影设备的位置发生变化之后，控制器对光源的调控过程。
在一些实施例中，当所述光源的亮度恢复为正常投影时的亮度时，启动所述传感器。在光源的亮度恢复为正常投影时的亮度时，也就是投影设备投入正常投影工作中，此时可以重新启动传感器，以开启新一轮的保护功能。
在一些实施例中，当控制器根据投影设备位置变化将光源调整为预设亮度之后，也可以不关闭传感器，也就是让传感器持续工作，控制器也继续检测传感器发送的感应信号变化。在传感器监测到投影设备不在发送移动时，也就是控制器检测到感应信号恢复稳定时，逐渐增加光源的亮度，直至恢复正常投影时的亮度。
在一些实施例中，本申请能够利用传感器监测投影设备的位置变化，当其位置一旦发生变化时，则立即触发保护机制，也就是将光源的亮度调整至小于正常投影时的亮度。在降低光源亮度的情况下移动投影设备，即使光源朝向用户，那么也不会让用户感觉到刺眼 等情况，从而保护了用户的眼睛。本申请能够在保护用户的眼睛同时，充分发挥微型投影设备的移动便携性。
在一些实施例中，为了对投影设备的保护功能做进一步说明，本申请实施例还提供了一种亮度调节方法。所述方法包括以下步骤：检测传感器发送的感应信号变化，所述感应信号的变化表征投影设备发生移动。响应感应信号的变化，将光源的亮度调整至预设亮度，其中，所述预设亮度小于正常投影时的亮度。
在一些实施例中，投影设备在使用过程中，控制器通过传感器对投影设备的整体位置变化进行感应，控制器实时检测传感器所感应到的感应信号。当感应信号发生变化后，控制器控制光源降低亮度，即将亮度调整为预设亮度，该预设亮度小于正常投影时的亮度，其最小可设置为0，当预设亮度为0时，也就说明，当投影设备重力发生变化后，直接将光源关闭。
在一些实施例中，在调整光源的亮度时，可根据投影设备的变化后感应信号值的不同，或者投影设备感应信号的变化率的不同，作出不同的调整。本申请控制器响应感应信号的变化，确定变化后的感应信号值；根据变化后的感应信号值与预设映射关系，将光源的亮度调整至对应变化后的感应信号值的亮度值，其中，预设亮度包含多个亮度值，预设映射关系为感应信号值和亮度值的对应关系，在映射关系中不同的亮度值对应不同的感应信号值。
在一些实施例中，本申请可按照亮度的大小，设置预设亮度中的多个亮度值，一个亮度值对应一个变化后的感应信号值，将光源的亮度调整为与变化后的感应信号值相对应的亮度，其中，变化后的感应信号值与投影设备的移动幅度有关。例如，设置有A、B、C三个亮度值，其中，A亮度值大于B亮度值，B亮度值大于C亮度值，那么，当投影设备的重力值由0变化为10时，则将光源的投影亮度调整为C，当投影设备的重力值由0变化为20时，则将光源的投影亮度调整为B，当投影设备的重力值由0变化为30时，则将光源的投影亮度调整为A。
在一些实施例中，控制器响应感应信号的变化，确定感应信号的变化率，根据感应信号的变化率与预设映射关系，将光源的亮度调整至对应感应信号的变化率的亮度值，其中，预设亮度包含多个亮度值，预设映射关系为感应信号的变化率和亮度值的对应关系，在映射关系中不同的亮度值对应不同的感应信号变化速率。
在一些实施例中，本申请中设置的几个不同的亮度值，还可分别对应不同的感应信号的变化率，将光源的亮度调整为与感应信号的变化率相对应的亮度。承接上述例子，假如投影设备的重力值同样是由0变化为10，若所用时间为8秒，则将光源的投影亮度调整为C，若所用时间为5秒，则将光源的投影亮度调整为B，若所用时间为3秒，则将光源的投影亮度调整为A。当感应信号的变化率越大时，光源的亮度衰减率越快。
在一些实施例中，本申请实施例中的亮度调节方法，能够根据投影设备的位置变化，调整光源的亮度，防止投影设备在移动过程中，光源对人眼造成伤害，因此，本申请能够对用户眼睛起到保护功能。
由于以上实施方式均是在其他方式之上引用结合进行说明，不同实施例之间均具有相同的部分，本说明书中各个实施例之间相同、相似的部分互相参见即可。在此不再详细阐述。
需要说明的是，在本说明书中，诸如“第一”和“第二”等之类的关系术语仅仅用来 将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或暗示这些实体或操作之间存在任何这种实际的关系或顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的电路结构、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种电路结构、物品或者设备所固有的要素。在没有更多限制的情况下，有语句“包括一个……”限定的要素，并不排除在包括所述要素的电路结构、物品或者设备中还存在另外的相同要素。
本领域技术人员在考虑说明书及实践这里发明的公开后，将容易想到本申请的其他实施方案。本申请旨在涵盖本申请的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本申请的一般性原理并包括本申请未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本申请的真正范围和精神由权利要求的内容指出。
以上所述的本申请实施方式并不构成对本申请保护范围的限定。
Claims (15)
- 一种投影设备，其特征在于，所述投影设备包括：传感器；光源；控制器，所述控制器分别和所述光源与所述传感器连接，所述控制器被配置为：检测所述传感器发送的感应信号变化，所述感应信号的变化表征所述投影设备发生移动；响应所述感应信号的变化，将所述光源的亮度调整至预设亮度，其中，所述预设亮度小于正常投影时的亮度。
- 根据权利要求1所述的投影设备，其特征在于，所述响应所述感应信号的变化，将所述光源的亮度调整至预设亮度，包括：响应所述感应信号的变化，确定变化后的感应信号值；根据所述变化后的感应信号值与预设映射关系，将所述光源的亮度调整至对应所述变化后的感应信号值的亮度值，其中，所述预设亮度包含多个亮度值，所述预设映射关系为感应信号值和亮度值的对应关系，在所述映射关系中不同的亮度值对应不同的感应信号值。
- 根据权利要求1所述的投影设备，其特征在于，所述响应所述感应信号的变化，将所述光源的亮度调整至预设亮度，包括：响应所述感应信号的变化，确定感应信号的变化率；根据所述感应信号的变化率与预设映射关系，将所述光源的亮度调整至对应所述感应信号的变化率的亮度值，其中，所述预设亮度包含多个亮度值，所述预设映射关系为感应信号的变化率和亮度值的对应关系，在所述映射关系中不同的亮度值对应不同的感应信号变化速率。
- 根据权利要求1所述的投影设备，其特征在于，所述控制器还被配置为：若接收到输入的恢复指令，则控制所述光源恢复正常投影时的亮度。
- 根据权利要求4所述的投影设备，其特征在于，所述若接收到输入的恢复指令，则控制所述光源恢复正常投影时的亮度，包括：接收用户通过所述投影设备上管控所述光源的按钮输入的恢复指令，控制所述光源恢复正常投影时的亮度；或者，接收用户通过遥控器输入的恢复指令，控制所述光源恢复正常投影时的亮度。
- 根据权利要求1所述的投影设备，其特征在于，所述控制器还被配置为：若在预设时间内没有接收到输入的恢复指令，则逐渐增加所述光源的亮度，直至恢复正常投影时的亮度。
- 根据权利要求1所述的投影设备，其特征在于，所述投影设备还被配置为：检测所述传感器发送的感应信号变化，在所述感应信号恢复稳定时，逐渐增加所述光源的亮度，直至恢复正常投影时的亮度。
- 根据权利要求1-6任意一项所述的投影设备，其特征在于，所述控制器还被配置为：当所述光源的亮度调整为所述预设亮度时，关闭所述传感器；当所述光源的亮度恢复为正常投影时的亮度时，启动所述传感器。
- 一种亮度调节方法，其特征在于，所述方法包括：检测传感器发送的感应信号变化，所述感应信号的变化表征投影设备发生移动；响应所述感应信号的变化，将光源的亮度调整至预设亮度，其中，所述预设亮度小于正常投影时的亮度。
- 根据权利要求9所述的亮度调节方法，其特征在于，所述响应所述感应信号的变化，将所述光源的亮度调整至预设亮度，包括：响应所述感应信号的变化，确定变化后的感应信号值；根据所述变化后的感应信号值与预设映射关系，将所述光源的亮度调整至对应所述变化后的感应信号值的亮度值，其中，所述预设亮度包含多个亮度值，所述预设映射关系为感应信号值和亮度值的对应关系，在所述映射关系中不同的亮度值对应不同的感应信号值。
- 一种亮度调节方法，其特征在于，所述方法包括：检测所述投影设备的移动；在所述投影设备发生移动时，根据预设亮度控制所述投影设备的光源的亮度，以使所述光源的亮度小于正常投影时的亮度；在所述投影设备未发生移动时，根据图像信号中的亮度数据控制所述投影设备的光源的亮度。
- 一种亮度调节方法，其特征在于，所述方法包括：检测所述投影设备的移动；在所述投影设备发生移动时，同时根据预设亮度和图像信号中的亮度数据控制所述投影设备的光源的亮度，以使所述光源的亮度降低；在所述投影设备未发生移动时，根据图像信号中的亮度数据控制所述投影设备的光源的亮度。
- 一种亮度调节方法，其特征在于，所述方法包括：检测所述投影设备的移动；在所述投影设备发生移动时，同时根据预设权重和图像信号中的亮度数据控制所述投影设备的光源的亮度，以使所述光源的亮度降低；在所述投影设备未发生移动时，根据图像信号中的亮度数据控制所述投影设备的光源的亮度。
- 一种亮度调节方法，其特征在于，所述方法包括：检测所述投影设备的移动；在所述投影设备发生移动时，减少成像元件中可成像的像素数量，以使用户可视的亮度降低；在所述投影设备未发生移动时，根据图像信号中的颜色数据控制成像元件中可成像的像素数量。
- 一种亮度调节方法，其特征在于，所述方法包括：检测所述投影设备的移动；在所述投影设备发生移动时，减少成像元件中可成像的像素数量并降低光源亮度，以使用户可视的亮度低于图像信号对应的用户可视亮度；在所述投影设备未发生移动时，根据图像信号中控制成像元件中可成像的像素数量和光源亮度。
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