Lamp

Abstract

The lamp comprises a support, a lamp holder, a light source, an angle sensor, an indicating unit and a controller. The lamp holder is rotatably connected to the support. The light source, the angle sensor and the indicating unit are respectively arranged on the lamp holder. The angle sensor is used for sensing the rotation angle of the current pose of the lamp holder relative to a preset pose. The indication unit is used for displaying an identifier. The controller is electrically connected to the indicating unit and the angle sensor. The controller is electrically connected to the indicating unit and the angle sensor, the controller controls the indicating unit to display the corresponding identification according to the rotation angle, and a user can adjust the lamp holder to the optimal angle based on indication of the identification and real-time updating of the identification.

Description

Technical Field

[0001] The invention relates to a lighting device, in particular to a lamp. Background Art

[0002] The keys of a piano are usually arranged in a rectangular shape. Ordinary desk lamps for reading and writing cannot provide such a long and narrow lighting range, which will cause the edges of the piano to be darker, but the middle is too bright, and the overall illumination distribution is uneven, which can easily cause eye fatigue after long-term use. Therefore, unlike ordinary desk lamps, the common piano lamps are usually presented in long strips to ensure that the entire piano has uniform illumination.

[0003] The piano light not only needs to illuminate the piano keys, but also the music sheet placed against the piano table. The materials of the piano keys and the music sheet are different, and the actual brightness of the two reflecting the same light to the user's eyes is also different. Therefore, the light intensity distribution of the piano light needs to be adjusted according to the position, orientation and material of the keys and music sheet, thereby providing an asymmetric light source.

[0004] However, the position deviation of the piano lamp will aggravate the problem of uneven illumination, which requires users to correctly adjust the position of the piano lamp. For aesthetic reasons, the lamp head is often not designed as a standard rectangular column, which makes it difficult for users to intuitively judge the rotation angle of the lamp head. Therefore, how to guide users to quickly and accurately judge and adjust the lamp head has become a new research topic. Summary of the invention

[0005] The object of the present invention is to provide a lamp which is easy to adjust to an optimal lighting angle.

[0006] To achieve the above object, the present invention provides a lamp, comprising:

[0007] Bracket;

[0008] A lamp holder rotatably connected to the bracket;

[0009] A light source is arranged on the lamp head;

[0010] An angle sensor is arranged on the lamp head, and is used to sense the rotation angle of the current posture of the lamp head relative to the preset posture;

[0011] an indicating unit, disposed on the lamp head, and used for displaying a logo; and

[0012] A controller, electrically connected to the indicating unit and the angle sensor respectively;

[0013] The controller controls the indicating unit to display the corresponding mark according to the rotation angle.

[0014] Preferably, when the rotation angle of the current posture relative to the preset posture is less than or equal to a first range, the controller determines that the current posture of the lamp head is upright; when the rotation angle of the current posture relative to the preset posture is greater than the first range, the controller determines that the current posture of the lamp head is tilted.

[0015] Further preferably, the angle sensor is also used to sense the tilt direction and / or tilt degree of the current posture relative to the preset posture.

[0016] Further preferably, the indication unit is further used to indicate the inclination direction and / or inclination degree of the current posture relative to the preset posture.

[0017] Further preferably, the indication unit is also used to indicate the user's adjustment direction and / or adjustment degree.

[0018] Further preferably, the direction in which the current posture is inclined relative to the preset posture includes a first inclination direction and a second inclination direction which are opposite to each other; the mark displayed by the indicating unit includes a first mark, a second mark and a third mark,

[0019] When the current posture is correct, the indication unit displays the first mark;

[0020] When the current posture is tilted toward the first tilt direction, the indication unit displays the second mark;

[0021] When the current posture is inclined toward the second inclination direction, the indication unit displays the third mark.

[0022] Preferably, when the angle sensor senses that the rotation angle of the lamp head has not changed for a period exceeding a preset period, the controller controls the indicating unit to turn off.

[0023] Preferably, the rotation angle is the angle between the central axis direction of the light emitting sector of the light source and the direction of gravity.

[0024] Preferably, the controller is disposed on the bracket or the lamp head, and the angle sensor is electrically connected to a circuit board on which the controller is disposed.

[0025] Preferably, the lamp head is rotatably connected to the bracket via a pivot or a universal shaft.

[0026] Compared with the prior art, the lamp provided by the present invention includes a bracket, a lamp head, a light source, an angle sensor, an indicating unit and a controller. The lamp head is rotatably connected to the bracket. The light source, the angle sensor and the indicating unit are respectively arranged on the lamp head. The angle sensor is used to sense the rotation angle of the current posture of the lamp head relative to the preset posture. The indicating unit is used to display a logo. The controller is electrically connected to the indicating unit and the angle sensor respectively. The controller is electrically connected to the indicating unit and the angle sensor respectively, and the controller controls the indicating unit to display the corresponding logo according to the rotation angle, and the user can adjust the lamp head to the optimal angle based on the indication of the logo and its real-time update. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the three-dimensional structure of a lamp in one embodiment of the present invention;

[0028] Figure 2 is a functional block diagram of a lamp in one embodiment of the present invention;

[0029] Figure 3 is a schematic diagram of the rotation angle of the lamp head of a lamp in one embodiment of the present invention;

[0030] Figure 4 is a schematic diagram of the placement of a lamp and a piano in one embodiment of the present invention;

[0031] Figures 5A to 5C They are Figure 1 A local enlarged schematic diagram of point A in the middle. DETAILED DESCRIPTION

[0032] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed description is given in conjunction with the embodiments.

[0033] Certain words are used in the specification and claims to refer to specific components. Those with ordinary knowledge in the field should understand that manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but rather use differences in components' functions as the criteria for distinction. The term "including" mentioned throughout the specification and claims is an open-ended term and should be interpreted as "including but not limited to".

[0034] See also Figure 1 , Figure 11 is a schematic diagram of a three-dimensional structure of a lamp in an embodiment of the present invention. The lamp 1 provided by the present invention includes a bracket 12, a lamp head 11, a light source 16, an angle sensor 14, an indication unit 13 and a controller 151. The lamp head 11 is rotatably connected to the bracket 12, for example, the lamp head 11 is rotatably connected to the bracket 12 by a pivot or a universal shaft, so that the lamp head 11 can at least rotate around its length direction. The light source 16, the angle sensor 14 and the indication unit 13 are respectively arranged on the lamp head 11.

[0035] The angle sensor 14 is used to sense the rotation angle of the current position of the lamp head 11 relative to the preset position. It should be noted that the preset position is the position of the lamp head 11 when providing the expected lighting effect, which is used as a reference for judging whether the lamp head 11 is straight or tilted. Figure 3 , taking the preset posture of the lamp head 11 as the coincidence of the central axis direction L of the light emitting sector of the light source 16 and the gravity direction G as an example, the angle sensor 14 senses the rotation angle of the lamp head 11 according to the angle between the central axis direction L of the light emitting sector of the light source 16 and the gravity direction G in the current posture of the lamp head 11. In other words, the rotation angle is: the angle between the central axis direction L of the light emitting sector of the light source 16 and the gravity direction G. Among them, the angle sensor 14 is, for example, a gravity sensor (G sensor), an accelerometer (Acceleration transducer), etc., and the present invention is not limited thereto. In other embodiments, when the lamp head 11 is in the preset posture, the central axis direction L of the light emitting sector of the light source does not coincide with the gravity direction G. At this time, for example, the installation posture direction of the angle sensor 14 in the preset posture can be set to the gravity direction G; in other embodiments, the angle sensor 14 in the preset posture can also be reset to zero, so as to realize direct sensing of the rotation angle; the present invention is not limited thereto.

[0036] The indicating unit 13 is used to display an identification to indicate the rotation angle of the lamp head 11 , thereby guiding the user to adjust the lamp head 11 .

[0037] The controller 151 is disposed on the bracket 12 or the lamp head 11, and is electrically connected to the indicating unit 13 and the angle sensor 14, respectively. The controller 151 receives and processes the signal from the angle sensor 14, and then obtains the corresponding control signal to control the indicating unit 13 to display the logo. Figure 2, the controller 151 is arranged on the circuit board 15, and the indicating unit 13 and the angle sensor 14 can be electrically connected to the circuit board 15, for example, by a cable, so as to facilitate the electrical connection between the components in the lamp 1 and to facilitate the installation of the components to a suitable position, for example, it is easy to set the installation position direction of the angle sensor 14; the indicating unit 13 is installed at a position where it is easy to observe the logo displayed by it, etc. In this embodiment, when the rotation angle of the current position of the lamp head 11 relative to the preset position is less than or equal to the first range, the controller 151 determines that the current position of the lamp head 11 is upright, and controls the indicating unit to display the logo indicating that the current position of the lamp head 11 is upright. When the rotation angle of the current position of the lamp head 11 relative to the preset position is greater than the first range, the controller 151 determines that the current position of the lamp head 11 is tilted, and controls the indicating unit to display the logo indicating that the current position of the lamp head 11 is tilted. In this way, the user can judge whether the current position of the lamp head 11 is tilted or upright according to the logo displayed by the indicating unit 13. For example, when the user sees that the current posture of the lamp head 11 is tilted, the user can determine that the posture of the lamp head 11 needs to be adjusted; after adjusting the lamp head 11, when the user sees that the current posture of the lamp head 11 is straight, the user can determine that there is no need to adjust the posture of the lamp head 11. The indication unit 13 can guide the user to adjust the posture of the lamp head 11, so as to quickly and conveniently obtain the best lighting effect and improve the user experience.

[0038] In a preferred embodiment, if Figure 3 and Figure 4 As shown, the distance of the lamp head 11 relative to the irradiation surface is different, and the size of the first range used by the controller 151 to determine whether the current posture of the lamp head 11 is correct is also correspondingly different. Specifically, when the distance of the lamp head 11 relative to the irradiation surface (for example, the surface of the piano keys 21) is small, the controller 151 sets a smaller first range. Thereby overcoming the problem that the intersection area of ​​the light-emitting sector of the light source 16 and the irradiation surface is correspondingly reduced due to the reduction in the distance of the lamp head 11 relative to the irradiation surface, and then causing the irradiation surface to be easily moved out of the irradiation range of the light source 16 when the lamp head 11 rotates around its length direction. At this time, setting a smaller first range can make the preset posture indicated to the user compatible with the posture that can actually obtain the expected lighting effect. In other words, the distance of the lamp head 11 relative to the irradiation surface is reduced, and the value of the first range is set to be relatively small, so that the light provided by the lamp head 11 in the preset posture can more accurately fall in the area where the user wants to obtain illumination, thereby obtaining the best lighting effect.

[0039] In a preferred embodiment, the light-emitting surface of the lamp head 11 is also provided with a distance sensor (such as an infrared distance sensor, a radar distance sensor, etc.) for confirming the distance of the lamp head 11 relative to the irradiation surface, and then the controller 151 sets the size of the first range according to the distance. In one embodiment, the controller 151 sets the size of the first range in a step-by-step manner based on the size of the distance, that is, the distance falling within a section corresponds to the size of a first range; in another embodiment, or the controller 151 smoothly adjusts according to the change in the size of the distance to obtain the first range; the present invention is not limited to this. In this way, it is possible to avoid the change in the distance between the lamp head 11 and the irradiation surface, which affects the controller 151's correct judgment on whether the current posture of the lamp head 11 is correct, thereby improving the detection and adjustment accuracy of the posture of the lamp head 11, and improving the adaptability of the posture detection and adjustment of the lamp head 11 to different distances.

[0040] For example, see Figure 4 When the lamp 1 is used to provide lighting for the piano 2, the light needs to illuminate the keys 21 and the music sheet 3 at the same time, that is, the keys 21 and the music sheet 3 are the illumination surfaces. It can be understood that the music sheet 3 is generally placed against the piano table 22 of the piano 2 and is generally located in the middle of the keys 21, that is, the music sheet 3 is generally located behind the keys 21 and slightly inclined to the keys 21. In this embodiment, the light source 16 is designed as an asymmetric light source 16 to provide at least a first lighting area 101 for illuminating the music sheet 3 and a second lighting area 102 for illuminating the keys 21. The illumination of the first lighting area 101 is greater than that of the second lighting area 102 to solve the problem that the keys 21 and the music sheet 3 are made of different materials, resulting in different actual brightness of the same light reflected by the two to the human eye; and the asymmetric light source 16 can also set the light-emitting sectors of the first lighting area 101 and the second lighting area 102 according to the different positions and orientations of the keys 21 and the music sheet 3, respectively, to obtain a better lighting effect. It should be noted that when the light source 16 has multiple lighting areas, the light-emitting sectors of the multiple lighting areas may be different. The central axis direction L of the light-emitting sector of the light source 16 mentioned above can be the central axis direction L of the light-emitting sector of one of the lighting areas; it can also be the overall central axis direction L after multiple light-emitting sectors are superimposed; the present invention is not limited to this.

[0041] In a preferred embodiment, see Figure 4The first lighting area 101 described above is shorter in the first direction X (i.e., the length direction of the key 21) and is concentrated in the middle position of the key 21, so that when the lamp head 11 is placed in the center of the piano 2 in the first direction X, the first lighting area 101 is concentrated on the music score 3, and will not illuminate the piano table 22 behind the music score 3, so as to avoid the light irradiating the piano table 22 and reflecting to the human eye, causing glare and other discomfort; the second lighting area 102 is longer in the first direction X and is flat and long, so as to evenly illuminate the entire key 21; in other embodiments, the lengths of the first lighting area 101 and the second lighting area 102 in the first direction X may also be the same, and the present invention is not limited to this.

[0042] Please see again Figure 3 In this embodiment, the angle sensor 14 specifically senses the rotation angle of the lamp head 11 relative to the bracket 12 in the first tilt direction D1 and the second tilt direction D2, and then converts it into the tilt direction of the current posture of the lamp head 11 relative to the preset posture. Among them, the first tilt direction D1 and the second tilt direction D2 are both directions of rotation around the length direction of the lamp head 11, and the first tilt direction D1 and the second tilt direction D2 are opposite in direction (for example, the first tilt direction D1 is the direction in which the lamp head 11 rotates clockwise with its length direction as the axis, and the second tilt direction D2 is the direction in which the lamp head 11 rotates counterclockwise with its length direction as the axis). That is to say, the user places the bracket 12 of the lamp 1 on a stable plane such as the ground or the table top of a piano 2, and then adjusts the position and posture of the lamp head 11 relative to the bracket 12, and then adjusts the lamp head 11 to the preset posture, wherein the tilt direction of the lamp head 11 detected by the angle sensor 14 includes: the first tilt direction D1 and the second tilt direction D2 of the lamp head 11 relative to the preset posture. When the lamp head 11 tilts to the first tilt direction D1 or the second tilt direction D2, the controller 151 controls the indication unit 13 to display the corresponding mark to prompt the user that the current lamp head 11 is tilted and the tilt direction of the lamp head 11.

[0043] It should be noted that if Figure 4 As shown, the human eye is more sensitive to the horizontal or vertical orientation of a long object. The user can easily adjust the lamp head 11 to the middle position of the piano key 21 in the first direction X, adjust the lamp head 11 to a suitable height S1 relative to the piano key 21 in the second direction Y, adjust the lamp head 11 to a suitable distance S2 relative to the piano stand 22 in the third direction Z, and adjust the length direction of the lamp head 11 to horizontal. However, it is difficult to confirm whether the rotation angle of the lamp head 11 around its length direction is appropriate. If the rotation angle is not appropriate, the light provided by the asymmetric light source 16 will be more uneven. For example, Figure 4Based on the position of the lamp head 11, the lamp head 11 is rotated clockwise. At this time, the first lighting area 101 moves to the key 21, and the first lighting area 101 can only illuminate the lower half of the music score 3 at most, while the first lighting area 101 and the second lighting area 102 may fall on the key 21 at the same time, causing eye fatigue due to uneven illumination when the user views the key 21; and the illumination on the music score 3 is insufficient and uneven, causing the user to be unable to see the music score 3 clearly. That is, the present invention can help the user obtain the rotation angle by detecting the tilt direction of the lamp head 11 mentioned above, so that the user can obtain the expected lighting effect without the help of other auxiliary tools, thereby improving the user's experience.

[0044] Preferably, the identification displayed by the indicator unit 13 includes a first identification, a second identification and a third identification. When the current posture of the lamp head 11 is upright, the indicator unit 13 displays the first identification; when the lamp head 11 is tilted in the first tilt direction D1, the indicator unit 13 displays the second identification; when the lamp head 11 is tilted in the second tilt direction D2, the indicator unit 13 displays the third identification, so that the user can more easily distinguish whether the lamp head 11 is tilted, and the tilt direction of the lamp head 11. For example, the indicator unit 13 may include an indicator light bar composed of a plurality of lamp beads, and the lamp beads at corresponding positions and numbers in the indicator light bar emit light to represent the first identification, the second identification and the third identification respectively; or, the indicator unit 13 may also include an illuminable arrow for indicating the tilt direction of the lamp head 11 (for example, arrows pointing to the left and right directions, or arrows parallel to the circumferential direction of the lamp head 11, etc.); in addition, a display screen may also be used to display the content of the indicator unit 13, but the present invention is not limited thereto.

[0045] In a preferred embodiment, the controller 151 also controls the indicating unit 13 to indicate the degree of inclination according to the degree of inclination of the current posture of the lamp head 11 relative to the preset posture sensed by the angle sensor 14. The degree of inclination corresponds to the angle between the current posture of the lamp head 11 and the preset posture. When the inclination direction of the lamp head 11 is the first inclination direction D1, the controller 151 controls the corresponding position in the indicating unit 13 to display the second mark, or controls the indicating unit 13 to display the second mark of the corresponding length, size or shape according to the angle between the current posture of the lamp head 11 and the preset posture; when the inclination direction of the lamp head 11 is the second inclination direction D2, the controller 151 controls the corresponding position in the indicating unit 13 to display the third mark, or controls the indicating unit 13 to display the third mark of the corresponding length, size or shape according to the angle between the current posture of the lamp head 11 and the preset posture, so that the user can estimate the inclination of the lamp head 11 and adjust the lamp head 11 to the optimal lighting angle more quickly.

[0046] In this example, see Figures 5A to 5C The indicating unit 13 includes an indicator light bar composed of a row of lamp beads arranged in the left-right direction (a total of seven lamp beads are used as an example in this embodiment). When the current position of the lamp head 11 is upright, Figure 5B As shown, the middle lamp bead lights up, which is the first mark; when the current position of the lamp head 11 is tilted toward the first tilt direction D1 relative to the preset position, as shown Figure 5C As shown, the middle lamp bead and one to three lamp beads on its right side emit light correspondingly, that is, the second mark; for example, when the angle between the current posture and the preset posture reaches 0.5 degrees, the one lamp bead on the right side emits light; when the angle reaches 3 degrees, the two lamp beads on the right side emit light; when the angle reaches 5 degrees, the three lamp beads on the right side emit light ( Figure 5C When the current position of the lamp head 11 is tilted toward the second tilt direction D2 relative to the preset position, as shown in the figure when the angle is greater than or equal to 5 degrees, the present invention is not limited thereto. Figure 5A As shown, the middle lamp bead and one to three lamp beads on its left side emit light correspondingly, that is, the third mark; the specific example of the lamp bead lighting method is similar to that when the lamp head 11 is tilted in the first tilt direction D1 ( Figure 5A In other embodiments, the indicating unit 13 may also display the first identification, the second identification, and the third identification in other forms, for example, the lamp beads in the indicator light bar may emit lights of different colors to represent the first identification, the second identification, and the third identification, respectively; or the display screen included in the indicating unit 13 may directly display the value of the rotation angle, etc. The present invention is not limited thereto.

[0047] In a preferred embodiment, when the user learns that the initial position of the lamp head 11 is tilted and adjusts the position of the lamp head 11, the indication unit 13 is also used to indicate the user's adjustment direction and / or adjustment degree, that is, the mark displayed by the indication unit 13 changes in real time according to the user's adjustment of the lamp head 11, so as to indicate the tilt direction and / or tilt degree of the adjusted position of the lamp head 11 relative to the preset position. In the present embodiment, for example, the initial position of the lamp head 11 is inclined toward the first inclination direction D1 relative to the preset position. When the angle between the initial position and the preset position is greater than or equal to 5 degrees, in the indicator light bar included in the indication unit 13, the middle lamp bead and the three lamp beads on the right side thereof light up; when the user adjusts the lamp head 11 toward the second inclination direction D2, the number of lamp beads on the right side that light up decreases to indicate that the angle between the position of the lamp head 11 and the preset position is reduced (such as when the angle is 3°≤<5°, the middle lamp bead and the two lamp beads on the right side of the indicator light bar light up; when the angle is 0.5°≤<3°, the middle lamp bead and the one lamp bead on the right side of the indicator light bar light up); when the position of the lamp head 11 is adjusted to be straight (0°≤<0.5°), only the middle lamp bead in the indicator light bar lights up; the initial position of the lamp head 11 is similar when it is inclined toward the second inclination direction D2 relative to the preset position, and will not be repeated here.

[0048] In a preferred embodiment, the indicator unit 13 does not display the logo all the time, specifically: when the angle sensor 14 senses that the lamp head 11 rotates, the controller 151 controls the indicator unit 13 to start displaying the logo according to the signal from the angle sensor 14; when the indicator unit 15 displays the logo, after the angle sensor 14 senses that the rotation angle of the lamp head 11 has not changed for a period of time exceeding a preset period, the controller 151 controls the indicator unit 13 to turn off to save energy; or, when the angle sensor 14 senses that the rotation angle of the lamp head 11 has not changed for a period of time exceeding a preset period, the controller 151 controls the indicator unit 13 to display a fourth logo for indicating the luminous parameters of the light source 16, wherein the luminous parameters of the light source 16 include brightness, color temperature, etc., so that the indicator unit 13 can provide the user with more information and improve the user experience. The fourth logo can be presented in a different form from the first to third logos to facilitate user distinction, for example, the first to third logos are white lights emitted by the lamp beads, and the fourth logo is colored lights emitted by the lamp beads, etc., but the present invention is not limited thereto.

[0049] In summary, the lamp provided by the present invention includes a bracket, a lamp head, a light source, an angle sensor, an indicating unit and a controller. The lamp head is rotatably connected to the bracket. The light source, the angle sensor and the indicating unit are respectively arranged on the lamp head. The angle sensor is used to sense the rotation angle of the current position of the lamp head relative to the preset position. The indicating unit is used to display a logo. The controller is electrically connected to the indicating unit and the angle sensor, respectively. The controller is electrically connected to the indicating unit and the angle sensor, respectively, and the controller controls the indicating unit to display the corresponding logo according to the rotation angle, and the user can adjust the lamp head to the optimal angle based on the indication of the logo and its real-time update.

[0050] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, changes and modifications made without departing from the spirit and scope of the present invention are all within the scope of patent protection of the present invention.

Claims

1. A lamp, characterized in that: include: Bracket; A lamp holder rotatably connected to the bracket; A light source is arranged on the lamp head; An angle sensor is arranged on the lamp head, and is used to sense the rotation angle of the current posture of the lamp head relative to the preset posture; An indication unit is arranged on the lamp head, and is used to display a mark; as well as A controller, electrically connected to the indicating unit and the angle sensor respectively; The controller controls the indicating unit to display the corresponding mark according to the rotation angle.

2. The lamp according to claim 1, characterized in that: When the rotation angle of the current posture relative to the preset posture is less than or equal to the first range, the controller determines that the current posture of the lamp head is upright; when the rotation angle of the current posture relative to the preset posture is greater than the first range, the controller determines that the current posture of the lamp head is tilted.

3. The lamp according to claim 2, characterized in that: The angle sensor is also used to sense the tilt direction and / or tilt degree of the current posture relative to the preset posture.

4. The lamp according to claim 2, characterized in that: The indicating unit is further used to indicate the inclination direction and / or inclination degree of the current posture relative to the preset posture.

5. The lamp according to claim 2, characterized in that: The indication unit is also used to indicate the user's adjustment direction and / or adjustment degree.

6. The lamp according to claim 2, characterized in that: The direction in which the current posture is tilted relative to the preset posture includes a first tilt direction and a second tilt direction that are opposite to each other; the mark displayed by the indicator unit includes a first mark, a second mark and a third mark, When the current posture is correct, the indication unit displays the first mark; When the current posture is tilted toward the first tilt direction, the indication unit displays the second mark; When the current posture is inclined toward the second inclination direction, the indication unit displays the third mark.

7. The lamp according to claim 1, characterized in that: When the angle sensor senses that the rotation angle of the lamp head has not changed for a period exceeding a preset period, the controller controls the indicating unit to turn off.

8. The lamp according to claim 1, characterized in that: The rotation angle is the angle between the central axis direction of the light emitting sector of the light source and the direction of gravity.

9. The lamp according to claim 1, characterized in that: The controller is arranged on the bracket or the lamp head, and the angle sensor is electrically connected to a circuit board on which the controller is arranged.

10. The lamp according to claim 1, characterized in that: The lamp head is rotatably connected to the bracket via a pivot or a universal shaft.

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