A LED lamp panel capable of safely detecting light intensity and a method for detecting light intensity

Abstract

The present invention proposes an LED lamp panel that can safely detect light intensity and a method for detecting light intensity, which relates to the technical field of lamp panels. The LED lamp panel includes a lamp panel board, LED lamp beads, a first light intensity sensor and a symmetrically arranged light intensity sensor group, the LED lamp beads are arranged on the lamp panel board, the first light intensity sensor is arranged at the center point of the lamp panel board, the photosensitive end of the first light intensity sensor is located at the end away from the lamp panel board, the light intensity sensor group includes a second light intensity sensor and a third light intensity sensor, the second light intensity sensor and the third light intensity sensor are arranged back to back on the lamp panel board, the photosensitive end of the second light intensity sensor is facing the direction of the first light intensity sensor, and the photosensitive end of the third light intensity sensor is located at the end away from the lamp panel board. By optimizing the structure of the LED lamp panel and proposing a corresponding method for detecting light intensity, the light intensity of external interference can be eliminated, so that the light intensity information measured by the LED lamp beads can be accurately obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of lamp panels, and in particular to an LED lamp panel capable of safely detecting light intensity and a method for detecting light intensity. Background Art

[0002] LED light sources, due to their low power consumption, high photoelectric conversion efficiency, and low failure rate, have been widely adopted in various fields. Many industrial fields still rely on incandescent lamps for specific lighting environments. In many safety-related fields, since LED lamps have different failure modes than incandescent lamps, replacing incandescent lamps with LEDs also requires the addition of new fault diagnosis designs. This means that when replacing existing incandescent lamps with LEDs, the existing lamp panels can only be used to install and secure the LED lamps, but cannot effectively analyze the LED lamp failures.

[0003] On the other hand, the existing technology for fault diagnosis of LED lamps is limited to measuring the voltage and current of the LED lamp, that is, using the current to nominally indicate the brightness of the LED lamp. However, in the relevant industry standards, one failure mode of LED lamps is that when the voltage and current at both ends of the LED lamp remain unchanged, the LED light intensity becomes dim. In extreme cases, when the voltage and current at both ends of the LED lamp remain unchanged, the LED lamp will not light up. When the LED lamp has such a failure, the circuit that detects the voltage and current still thinks that the LED lamp is in the bright state, which will easily cause hidden dangers. To prevent the occurrence of such hidden dangers, the existing technology proposes to directly detect the light intensity of the LED lamp. However, due to the influence of strong external light in the environment, simple light intensity detection is still unable to accurately measure the changes in the light intensity of the LED lamp, and is greatly affected by the lighting of the external environment. Summary of the Invention

[0004] In order to overcome the above problems or at least partially solve the above problems, an embodiment of the present invention provides an LED lamp panel that can safely detect light intensity and a method for detecting light intensity. By optimizing the structure of the LED lamp panel, the light intensity of external interference can be eliminated, so that the light intensity information of the LED lamp beads can be accurately obtained and measured.

[0005] The embodiment of the present invention is achieved as follows:

[0006] In the first aspect, an embodiment of the present application provides an LED lamp panel that can safely detect light intensity, which includes a lamp panel board, LED lamp beads, a first light intensity sensor and a symmetrically arranged light intensity sensor group, the above-mentioned LED lamp beads are arranged on the above-mentioned lamp panel board, the above-mentioned first light intensity sensor is arranged at the center point of the above-mentioned lamp panel board, the photosensitive end of the above-mentioned first light intensity sensor is located at an end away from the above-mentioned lamp panel board, the above-mentioned light intensity sensor group includes a second light intensity sensor and a third light intensity sensor, the above-mentioned second light intensity sensor and the above-mentioned third light intensity sensor are arranged back to back on the above-mentioned lamp panel board, the photosensitive end of the above-mentioned second light intensity sensor is facing the direction of the above-mentioned first light intensity sensor, and the photosensitive end of the above-mentioned third light intensity sensor is located at an end away from the above-mentioned lamp panel board.

[0007] Based on the first aspect, in some embodiments of the present invention, the light intensity sensor group is arranged at the edge of the lamp panel.

[0008] In some embodiments of the present invention, the lamp panel is provided with a direction marking portion.

[0009] In some embodiments of the present invention, four groups of the above-mentioned light intensity sensor groups are included, namely the first light intensity sensor group, the second light intensity sensor group, the third light intensity sensor group and the fourth light intensity sensor group. The above-mentioned first light intensity sensor group and the second light intensity sensor group are symmetrically arranged on the above-mentioned lamp panel board with the center point of the above-mentioned lamp panel board as the center point of symmetry, and the above-mentioned third light intensity sensor group and the fourth light intensity sensor group are symmetrically arranged on the above-mentioned lamp panel board with the center point of the above-mentioned lamp panel board as the center point of symmetry.

[0010] In some embodiments of the present invention, the center point of the lamp panel is used as the coordinate origin to establish orthogonal X-axis and Y-axis, the line connecting the first light intensity sensor group and the second light intensity sensor group is used as the M-axis, and the line connecting the third light intensity sensor group and the fourth light intensity sensor group is used as the N-axis, and the M-axis and the N-axis are symmetrical about the Y-axis.

[0011] In some embodiments of the present invention, the angle between the M axis and the Y axis is 30°.

[0012] In some embodiments of the present invention, the LED lamp beads are symmetrically arranged on the lamp panel based on the X-axis, the Y-axis and the coordinate origin.

[0013] In some embodiments of the present invention, the LED lamp beads are divided into multiple paths, and each path is driven by a PWM waveform output by a corresponding constant current source.

[0014] In a second aspect, an embodiment of the present application provides a method for detecting light intensity, which includes the following steps:

[0015] Obtain measurement data of the first light intensity sensor, recorded as D1, and obtain measurement data values ​​of the second light intensity sensor and the third light intensity sensor corresponding to the first light intensity sensor group, the third light intensity sensor group, the second light intensity sensor group, and the fourth light intensity sensor group, recorded as D2, D3, D4, D5, D6, D7, D8, and D9, respectively;

[0016] Based on DM 正 =D2-D3, DM 负 =D6-D7, DN 正 =D4-D5 and DN 负 =D8-D9 to obtain the light intensity parameter DM 正 DM 负 DN 正 and DN 负 , and based on the light intensity parameter DM 正 DM 负 DN 正 and DN 负 Get the light intensity change information emitted by the LED lamp beads.

[0017] Based on the second aspect, some embodiments of the present invention further include performing pairwise difference calculations using D3, D5, D7, and D9 to obtain external light offset direction information.

[0018] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0019] First, the embodiments of the present invention provide an LED light panel that can safely detect light intensity. By optimizing the structure of the LED light panel and adding light intensity detection for the LED lamp beads, this effectively avoids the problem of the existing technology using current to nominal LED lamp brightness, which can cause the LED lamp beads to have current but not emit light, thus preventing effective identification. In addition, through structural optimization, the influence of external light sources on the light intensity detection of the LED lamp beads can be effectively eliminated, allowing accurate acquisition and measurement of the light intensity information of the LED lamp beads.

[0020] In addition, an embodiment of the present invention also proposes a method for detecting light intensity. After the LED lamp panel is divided into multiple areas through structural optimization design, an algorithm is designed between the values ​​measured in each area. The corresponding algorithm technology results can more accurately determine the luminous conditions of the nominal LED lamp, so that the light intensity detection of the LED lamp panel can be designed as a safe function for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a structural diagram of an embodiment of an LED lamp panel capable of safely detecting light intensity according to the present invention;

[0023] Figure 2 A top view of a light intensity sensor assembly according to an embodiment of an LED lamp panel capable of safely detecting light intensity according to the present invention;

[0024] Figure 3 This is a front view of a light intensity sensor group according to an embodiment of an LED lamp panel capable of safely detecting light intensity according to the present invention;

[0025] Figure 4 This is a right side view of a light intensity sensor assembly of an embodiment of an LED lamp panel capable of safely detecting light intensity according to the present invention;

[0026] Figure 5 This is a schematic diagram of a split-circuit drive for LED lamp beads according to an embodiment of an LED lamp panel capable of safely detecting light intensity according to the present invention;

[0027] Figure 6 This is a flow chart of an embodiment of a method for detecting light intensity according to the present invention.

[0028] Icons: 1. Lamp panel; 2. LED lamp beads; 3. First light intensity sensor; 4. Light intensity sensor group; 5. Second light intensity sensor; 6. Third light intensity sensor; 7. First light intensity sensor group; 8. Second light intensity sensor group; 9. Third light intensity sensor group; 10. Fourth light intensity sensor group; 11. Photosensitive end; 12. Direction identification part. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0032] In the description of the embodiments of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended only to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," "third," etc., etc., are intended only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] Furthermore, the use of terms such as "horizontal," "vertical," and "overhanging" does not necessarily imply that the component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0034] In the description of the embodiments of the present invention, if the term "multiple" appears, it means at least 2.

[0035] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0036] Example

[0037] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features thereof may be combined with each other.

[0038] Please refer to Figure 1-Figure 4 An embodiment of the present invention provides an LED lamp panel that can safely detect light intensity, which includes a lamp panel board 1, LED lamp beads 2, a first light intensity sensor 3 and a symmetrically arranged light intensity sensor group 4, the LED lamp beads 2 are arranged on the lamp panel board 1, the first light intensity sensor 3 is arranged at the center point of the lamp panel board 1, the photosensitive end 11 of the first light intensity sensor 3 is located at the end away from the lamp panel board 1, the light intensity sensor group 4 includes a second light intensity sensor 5 and a third light intensity sensor 6, the second light intensity sensor 5 and the third light intensity sensor 6 are arranged back to back on the lamp panel board 1, the photosensitive end 11 of the second light intensity sensor 5 is facing the direction of the first light intensity sensor 3, and the photosensitive end 11 of the third light intensity sensor 6 is located at the end away from the lamp panel board 1.

[0039] In the above embodiment, the LED lamp beads 2, the first light intensity sensor 3 and the symmetrically arranged light intensity sensor group 4 are all arranged on the lamp panel 1, and together constitute the LED lamp panel. Figure 2 As shown, the light intensity sensor group 4 is composed of two light intensity sensors, wherein the photosensitive end 11 is the end surface of the light intensity sensor for detecting light intensity. In terms of working principle, the light intensity sensor is a sensor made based on the principle of hot spot effect. This sensor mainly uses detection components that are highly responsive to weak light. These sensing components are like the photosensitive matrix of a camera, with a wound electroplated multi-junction thermopile inside, and its surface is coated with a high-absorption rate black layer (corresponding to Figure 2 The photosensitive end (11) in the sensor has a connection point on the sensing surface, while the cold junction is located within the body. This cold junction generates a thermoelectric potential. Within the linear range, the output signal is proportional to the irradiance. Visible light passing through the transparent sheet strikes the imported photodiode, which converts the intensity of the visible light into an electrical signal. This electrical signal then enters the sensor's processor system, which outputs the desired binary signal.

[0040] Specifically, in the above embodiment, the first light intensity sensor 3 is located at the center of the lamp panel 1, and the photosensitive end 11 of the first light intensity sensor 3 is located at the end away from the lamp panel 1, then the direction of the light mainly sensed by the first light intensity sensor 3 is towards Figure 1 The direction of the light in the LED light panel (in Figure 1The flat surface of the middle lamp panel 1 is the reference surface, and the direction of the light mainly sensed is the direction of the irradiation reference surface). The direction of the light mainly sensed by the second light intensity sensor 5 is the light irradiated from the center point of the lamp panel 1. The direction of the light mainly sensed by the third light intensity sensor 6 is consistent with the direction of the light mainly sensed by the first light intensity sensor 3. However, since the second light intensity sensor 5 and the third light intensity sensor 6 are arranged back to back on the lamp panel 1, the second light intensity sensor 5 will block the light irradiated from the center area of ​​the lamp panel 1, so that the light intensity sensed by the third light intensity sensor 6 can be used as the light intensity of external interference. In other words, the light intensity value obtained by the second light intensity sensor 5 minus the light intensity value obtained by the third light intensity sensor 6 is the light intensity value of the light emitted by the LED lamp bead 2. The second light intensity sensor 5 and the third light intensity sensor 6 can be used as a light intensity sensor group 4 to eliminate the light intensity of external interference, so that the light intensity information of the LED lamp bead 2 can be accurately obtained.

[0041] For example, the first light intensity sensor 3 , the second light intensity sensor 5 and the third light intensity sensor 6 may be of the same type. This will facilitate the installation and setting of the light intensity sensors without having to strictly distinguish between types during the installation process.

[0042] Please refer to Figure 1 In some embodiments of the present invention, the light intensity sensor group 4 is arranged at the edge of the lamp panel 1.

[0043] In the above embodiment, by positioning the light intensity sensor group 4 at the edge of the light panel 1, the light intensity value obtained by the third light intensity sensor 6 can be made closer to the actual external interference light intensity. The principle is that the closer the third light intensity sensor 6 is to the edge of the light panel 1, the more completely the light emitted by the LED lamp beads 2 arranged in the central area of ​​the light panel 1 is blocked by the second light intensity sensor 5, so that the third light intensity sensor 6 is not affected by the light. In other words, the external interference light intensity can be further obtained more accurately, so that the light intensity information of the LED lamp beads 2 can be accurately obtained.

[0044] Please refer to Figure 1 In some embodiments of the present invention, the lamp panel 1 is provided with a direction marking portion 12.

[0045] In the above embodiment, by setting the direction identification part 12 on the lamp panel board 1, it is convenient for the user to identify the direction of the lamp panel board 1, thereby facilitating the processing of the LED lamp panel and the setting of the positions of the LED lamp beads 2, the first light intensity sensor 3 and the light intensity sensor group 4 on the lamp panel board 1.

[0046] For example, the direction indicator 12 can be formed by simply providing a notch at the edge of the lamp panel 1 so that the direction can be identified through the notch, or by providing a raised structure at the edge of the lamp panel 1 so that the direction can be identified through the raised structure. Of course, the specific structure of the direction indicator 12 can be set according to actual conditions and is not strictly limited in the embodiments of the present invention.

[0047] Please refer to Figure 1 In some embodiments of the present invention, four groups of light intensity sensor groups 4 are included, namely a first light intensity sensor group 7, a second light intensity sensor group 8, a third light intensity sensor group 9 and a fourth light intensity sensor group 10. The first light intensity sensor group 7 and the second light intensity sensor group 8 are symmetrically arranged on the lamp panel board 1 with the center point of the lamp panel board 1 as the center point of symmetry, and the third light intensity sensor group 9 and the fourth light intensity sensor group 10 are symmetrically arranged on the lamp panel board 1 with the center point of the lamp panel board 1 as the center point of symmetry.

[0048] In the above embodiment, four groups of light intensity sensor groups 4 are provided, and the first light intensity sensor group 7 and the second light intensity sensor group 8 are symmetrically arranged on the lamp panel board 1 with the center point of the lamp panel board 1 as the symmetrical center point (so that the light intensity values ​​obtained by the first light intensity sensor group 7 and the second light intensity sensor group 8 are correlated), and the third light intensity sensor group 9 and the fourth light intensity sensor group 10 are symmetrically arranged on the lamp panel board 1 with the center point of the lamp panel board 1 as the symmetrical center point (so that the light intensity values ​​obtained by the third light intensity sensor group 9 and the fourth light intensity sensor group 10 are correlated). In other words, with the first light intensity sensor group 7 and the second light intensity sensor group 8 as one light intensity measurement group, and the third light intensity sensor group 9 and the fourth light intensity sensor group 10 as another light intensity measurement group, two groups of accurate light intensity values ​​of the light radiated by the LED lamp beads 2 toward the edge of the lamp panel board 1 can be obtained. The two sets of light intensity values ​​obtained are the light intensity values ​​of the first light intensity sensor group 7 and the second light intensity sensor group 8, and the light intensity values ​​of the third light intensity sensor group 9 and the fourth light intensity sensor group 10. By obtaining these two sets of light intensity values, it is possible to further obtain more accurate external interference light intensity (with more reference data), so that the light intensity information of the LED lamp bead 2 can be accurately obtained.

[0049] It should be noted that, for the sake of installation space cost control and data acquisition accuracy, although only four groups of light intensity sensor groups 4 are used in the design of the present invention, in actual use, in order to further increase the number of parameters obtained and to improve the accuracy of the light intensity information of the LED lamp beads 2 finally obtained and measured, the number of light intensity sensor groups 4 can be further increased.

[0050] Please refer to Figure 1 In some embodiments of the present invention, the center point of the lamp panel 1 is used as the coordinate origin to establish orthogonal X-axis and Y-axis, the line connecting the first light intensity sensor group 7 and the second light intensity sensor group 8 is used as the M-axis, and the line connecting the third light intensity sensor group 9 and the fourth light intensity sensor group 10 is used as the N-axis, and the M-axis and the N-axis are symmetrical about the Y-axis.

[0051] In the above embodiment, by arranging the M-axis and the N-axis symmetrically about the Y-axis, the first light intensity sensor group 7 and the third light intensity sensor group 9 are symmetrical about the Y-axis, and the second light intensity sensor group 8 and the fourth light intensity sensor group 10 are symmetrical about the Y-axis. This allows correlation between the light intensity values ​​obtained by the first light intensity sensor group 7 and the second light intensity sensor group 8, as well as the light intensity values ​​obtained by the first light intensity sensor group 7 and the third light intensity sensor group 9. In other words, the light intensity values ​​obtained by the first light intensity sensor group 7, the second light intensity sensor group 8, the third light intensity sensor group 9, and the fourth light intensity sensor group 10 can be better correlated, thereby improving the light intensity information ultimately obtained about the LED lamp beads 2.

[0052] For example, please refer to Figure 1 In some embodiments of the present invention, the angle between the M axis and the Y axis is 30°.

[0053] Please refer to Figure 1 In some embodiments of the present invention, the LED lamp beads 2 are symmetrically arranged on the lamp panel 1 based on the X-axis, the Y-axis and the coordinate origin.

[0054] In the above embodiment, by symmetrically arranging the LED lamp beads 2 on the lamp panel 1 about the X-axis, Y-axis, and coordinate origin, the first light intensity sensor group 7, the second light intensity sensor group 8, the third light intensity sensor group 9, and the fourth light intensity sensor group 10 can more accurately obtain the light intensity of the light radiated by the LED lamp beads 2, as well as the light intensity of external interference. The principle is that the light radiated by the LED lamp beads 2 in this arrangement is more uniform and easier to measure.

[0055] Please refer to Figure 5 In some embodiments of the present invention, the LED lamp beads 2 are divided into multiple paths, and each path is driven by a PWM waveform output by a corresponding constant current source.

[0056] In the above embodiment, by dividing the LED lamp bead 2 into multiple paths, each path is driven by the PWM waveform output by the corresponding constant current source, which can make the brightness adjustment of the LED lamp bead 2 smoother, thereby improving the user experience.

[0057] Please refer to Figure 6 , an embodiment of the present invention further provides a method for detecting light intensity, which includes the following steps:

[0058] Step S101: Obtain measurement data of the first light intensity sensor 3, recorded as D1, and obtain measurement data values ​​of the second light intensity sensor 5 and the third light intensity sensor 6 corresponding to the first light intensity sensor group 7, the third light intensity sensor group 9, the second light intensity sensor group 8, and the fourth light intensity sensor group 10, recorded as D2, D3, D4, D5, D6, D7, D8, and D9, respectively;

[0059] Step S102: Based on DM 正 =D2-D3, DM 负 =D6-D7, DN 正 =D4-D5 and DN 负 =D8-D9 to obtain the light intensity parameter DM 正 DM 负 DN 正 and DN 负 , and based on the light intensity parameter DM 正 DM 负 DN 正 and DN 负 Obtain the light intensity change information emitted by LED lamp bead 2.

[0060] In the above steps, the measured data values ​​D3, D5, D7, and D9 are the measured data values ​​of the third light intensity sensor 6 in the corresponding light intensity sensor group 4, that is, the measured light intensity values ​​of the external interference. In addition, the measured data values ​​D2, D4, D6, and D8 are the measured data values ​​of the second light intensity sensor 5 in the corresponding light intensity sensor group 4, that is, the measured light intensity values ​​of the light emitted by the LED lamp. Then, the corresponding light intensity parameter DM is obtained through the above calculation. 正 DM 负 DN 正 and DN 负 , can be used to judge whether any LED lamp bead 2 on the lamp panel 1 becomes dim or not. The principle is that when any LED lamp bead 2 on the lamp panel 1 becomes dim or not, the light emitted by the entire LED lamp panel to the surroundings will change, and the corresponding light intensity parameter DM 正 DM 负 DN 正 and DN 负 Corresponding fluctuations will occur, and then based on this fluctuation, we can reversely infer what changes have occurred in the light emitted by the entire LED lamp panel, that is, we can reversely infer which LED lamp bead 2 on the lamp panel board 1 has become dim or not bright.

[0061] Please refer to Figure 1In some embodiments of the present invention, it further includes performing difference calculations between two of D3, D5, D7, and D9 to obtain external light offset direction information.

[0062] In the above embodiment, by performing a pairwise difference calculation using D3, D5, D7, and D9, and then comparing these differences, the external light offset direction information can be obtained. The specific principle is that if the external light is irradiated perpendicular to the lamp panel 1, the measurement data values ​​D3, D5, D7, and D9 of the third light intensity sensor 6 in the multiple corresponding light intensity sensor groups 4 will be the same. In this way, the difference values ​​obtained by performing a pairwise difference calculation on D3, D5, D7, and D9 are all zero, which means that it can be reversely concluded that the external light is irradiated perpendicular to the lamp panel 1. Correspondingly, if the external light is irradiated to the lamp panel 1 at an angle, the difference values ​​obtained by performing a pairwise difference calculation on D3, D5, D7, and D9 will be non-zero. For example, if D3-D5>0, it means that the external light is more inclined to the direction of the light intensity sensor that obtains D3 (D3 is the measurement data value obtained by the third light intensity sensor 6 in the first light intensity sensor group 7). In other words, by performing difference calculations on D3, D5, D7, and D9 in pairs, the maximum value among D3, D5, D7, and D9 can be obtained, and it can be known that the external light is more inclined toward the direction of the light intensity sensor corresponding to the maximum value (multiple maximum values ​​are allowed. In the extreme case, when all four values ​​are maximum values, the degree to which the external light is inclined toward the directions of all corresponding light intensity sensors is the same, that is, the external light is irradiated perpendicular to the lamp panel 1).

[0063] It should be noted that the above steps use the difference calculations between D3, D5, D7, and D9 to obtain the approximate external light offset direction information. However, if the specific external light offset angle information is required, a corresponding function mapping relationship can be established between the difference calculation results and the external light offset angle information to obtain the precise external light offset angle information.

[0064] For example, based on the above difference calculation result logical analysis, DM 正 DM 负 DN 正 and DN 负 Perform difference calculations on each pair to obtain the offset information of the light emitted by similar LED lamp beads 2 relative to the direction perpendicular to the lamp panel 1, so as to determine the fault point of the LED lamp beads 2 in the corresponding direction on the lamp panel 1 (for example, if DM 正 -DM 负>0, it can be determined that the fault point of LED lamp bead 2 is closer to the direction of second light intensity sensor 5 of second light intensity sensor group 8. The specific logic and principle can be referred to the above analysis of using D3, D5, D7 and D9 to perform pairwise difference calculation to obtain external light offset direction information. The principle is similar and will not be repeated here.

[0065] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

[0066] It will be apparent to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above and that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present application is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. An LED lamp panel capable of safely detecting light intensity, characterized in that: It includes a lamp panel, LED lamp beads, a first light intensity sensor and a symmetrically arranged light intensity sensor group, the LED lamp beads are arranged on the lamp panel, the first light intensity sensor is arranged at the center point of the lamp panel, the photosensitive end of the first light intensity sensor is located at the end away from the lamp panel, the light intensity sensor group includes a second light intensity sensor and a third light intensity sensor, the second light intensity sensor and the third light intensity sensor are arranged back to back on the lamp panel, the photosensitive end of the second light intensity sensor is facing the direction of the first light intensity sensor, and the photosensitive end of the third light intensity sensor is located at the end away from the lamp panel.

2. The LED lamp panel with safe light intensity detection according to claim 1, characterized in that: The light intensity sensor group is arranged at the edge of the lamp panel.

3. The LED lamp panel with safe light intensity detection according to claim 1, characterized in that: The lamp panel is provided with a direction marking portion.

4. The LED lamp panel with safe light intensity detection according to claim 1, characterized in that: The light intensity sensor group comprises four groups, namely a first light intensity sensor group, a second light intensity sensor group, a third light intensity sensor group and a fourth light intensity sensor group. The first light intensity sensor group and the second light intensity sensor group are symmetrically arranged on the lamp panel board with the center point of the lamp panel board as the center point of symmetry. The third light intensity sensor group and the fourth light intensity sensor group are symmetrically arranged on the lamp panel board with the center point of the lamp panel board as the center point of symmetry.

5. The LED lamp panel capable of safely detecting light intensity according to claim 4, characterized in that: With the center point of the lamp panel as the coordinate origin, orthogonal X-axis and Y-axis are established, the line connecting the first light intensity sensor group and the second light intensity sensor group is used as the M-axis, and the line connecting the third light intensity sensor group and the fourth light intensity sensor group is used as the N-axis, and the M-axis and the N-axis are symmetrical about the Y-axis.

6. The LED lamp panel capable of safely detecting light intensity according to claim 5, characterized in that: The included angle between the M axis and the Y axis is 30°.

7. The LED lamp panel capable of safely detecting light intensity according to claim 5, characterized in that: The LED lamp beads are symmetrically arranged on the lamp panel based on the X-axis, the Y-axis and the coordinate origin.

8. The LED lamp panel capable of safely detecting light intensity according to claim 1, characterized in that: The LED lamp beads are divided into multiple paths, and each path is driven by a PWM waveform output by a corresponding constant current source.

9. A method for detecting light intensity, applied to the LED lamp panel capable of safely detecting light intensity as claimed in claim 4, characterized in that: The following steps are involved: Obtain measurement data of the first light intensity sensor, recorded as D1, and obtain measurement data values ​​of the second light intensity sensor and the third light intensity sensor corresponding to the first light intensity sensor group, the third light intensity sensor group, the second light intensity sensor group, and the fourth light intensity sensor group, recorded as D2, D3, D4, D5, D6, D7, D8, and D9, respectively; Based on DM 正 =D2-D3, DM 负 =D6-D7, DN 正 =D4-D5 and DN 负 =D8-D9 to obtain the light intensity parameter DM 正 DM 负 DN 正 and DN 负 , and based on the light intensity parameter DM 正 DM 负 DN 正 and DN 负 Get the light intensity change information emitted by the LED lamp beads.

10. The method for detecting light intensity according to claim 9, wherein: It also includes using D3, D5, D7 and D9 to perform difference calculations between each two to obtain external light offset direction information.

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