A lamp for alleviating myopia in children

Abstract

The application provides a lamp for alleviating myopia in children, comprising a power interface, a shell, and a light emitting device; the light emitting device comprises two or more red light LEDs, the spectral power distribution of the red light LEDs has a maximum peak, and the wavelength of the maximum peak is within the range of 620nm-780nm; in the working state, the half-height of the maximum peak of the spectral power distribution of the light emitted by the light emitting device is less than 45nm; the lamp further comprises a light homogenizing cover; after the light emitted by the light emitting device passes through the light homogenizing cover, the spectral irradiance of the maximum peak of the spectral power distribution in the visible light range at a position 1.5m away from the light homogenizing cover on the central axis of the lamp is between 0.15w / m 2 / nm-2.5w / m 2 / nm. Safe and effective beneficial light for preventing and treating myopia in children is provided in the lighting environment.

Description

Technical Field

[0001] This application relates to a lamp, and more particularly to a lamp that helps alleviate myopia in children. Background Technology

[0002] Myopia is a widely concerned issue in children's health. Currently, many families use full-spectrum lighting, but full-spectrum lamps have no significant effect on alleviating myopia in children. Two to three hours of outdoor activity daily with natural light can effectively curb myopia progression, but this is not easy for many children to maintain. Red light myopia therapy represents a significant advancement in the prevention and treatment of myopia in children. This device uses concentrated high-energy red light to irradiate the fundus for a short period to achieve therapeutic effects. For example, a red light myopia therapy device uses a concentrated laser beam to irradiate the fundus for three minutes at a time, twice a day, to treat myopia in children. However, the long-term risks of high-energy red light damage to the fundus from these relatively recent red light therapy devices are unknown, and in the short term, they can easily cause cone cell pressure overload and fundus burns. To address these issues, this disclosure provides a lighting device for alleviating myopia in children. This lighting device can prevent the onset of myopia and slow its progression. Summary of the Invention

[0003] A lamp for alleviating myopia in children includes a power interface, a housing, and a light-emitting device. The light-emitting device comprises two or more red LEDs, each with a maximum peak value in its spectral power distribution, the wavelength of which is within the range of 620nm-780nm. In operation, the total input power of all red LEDs is greater than 12W. The spectral power distribution of the light-emitting device has a maximum peak value, the wavelength of which is within the range of 600nm-780nm. At half the height of the maximum peak value in the spectral power distribution of the light emitted by the light-emitting device, the half-peak width is less than 45nm. The lamp also includes a light-diffusing shield. After passing through the light-diffusing shield, the light emitted by the light-emitting device is distributed along the central axis of the lamp. At a distance of 1.5m from the uniform light source, the spectral irradiance of the peak value of the spectral power distribution in the visible light range is more than four times greater than the spectral irradiance of the peak value of the spectral power distribution in the wavelength range of 380nm-500nm. After passing through the uniform light source, the spectral irradiance of the peak value of the spectral power distribution in the visible light range at a distance of 1.5m from the uniform light source on the central axis of the lamp is more than 1.5 times greater than the spectral irradiance of the peak value of the spectral power distribution in the wavelength range of 500nm-600nm. After passing through the uniform light source, the spectral irradiance of the peak value of the spectral power distribution in the visible light range at a distance of 1.5m from the uniform light source on the central axis of the lamp is 0.15w / m². 2 / nm-2.5w / m 2 Between / nm.

[0004] In some examples, after the light emitted by the light-emitting device passes through the uniform light cover, the spectral irradiance at a position 1.5m away from the uniform light cover on the central axis of the lamp, where the spectral power distribution reaches its maximum peak in the visible light range, is 0.2 W / m. 2 / nm-2.2w / m 2 Between / nm.

[0005] In some examples, the correlated color temperature of the light emitted by the light-emitting device is greater than 800K; after passing through the homogenizer, the spectral irradiance of the light emitted by the light-emitting device at a position 1.5m away from the homogenizer on the central axis of the lamp, at the location of the maximum peak value of the spectral power distribution in the visible light range, is greater than 5 times the spectral irradiance of the maximum peak value of the spectral power distribution in the wavelength range of 380nm-500nm; after passing through the homogenizer, the irradiance of the visible light emitted by the light emitted by the light-emitting device at a position 1.5m away from the homogenizer on the central axis of the lamp, is less than 45W / m². 2 .

[0006] In some examples, after the light emitted by the light-emitting device passes through the uniform light cover, the spectral irradiance at a position 1.5m away from the uniform light cover on the central axis of the lamp, where the spectral power distribution reaches its maximum peak in the visible light range, is 0.25w / m. 2 / nm-1.9w / m 2 Between / nm.

[0007] In some examples, under operating conditions, the half-peak width at half the height of the maximum peak of the spectral power distribution of the light emitted by the light-emitting device is less than 35 nm; after passing through the homogenizer, the visible light irradiance at a position 1.5 m away from the homogenizer on the central axis of the lamp is less than 30 W / m². 2 The correlated color temperature of the light-emitting device is greater than 1050K.

[0008] In some examples, under operating conditions, the half-peak width of the spectral power distribution of the light emitted by the light-emitting device is less than 30 nm at half the height of the maximum peak value; after the light emitted by the light-emitting device passes through the homogenizer, the optimal value of the spectral irradiance at a position 1.5 m away from the homogenizer on the central axis of the lamp, where the maximum peak value of the spectral power distribution in the visible light range is 0.3 W / m. 2 / nm-1.5w / m 2 Between / nm.

[0009] In some examples, under operating conditions, the proportion of light power within a wavelength range of plus or minus 20 nm of the maximum peak value of the spectral power distribution radiated by the light-emitting device is greater than 60% of the light power radiated by the light-emitting device in the wavelength range of 620 nm-780 nm.

[0010] In some examples, under operating conditions, the wavelength of the light emitted by all the red LEDs is in the range of 600nm-780nm, and the optical power is in the range of 50W-200W.

[0011] In some examples, after the light emitted by the light-emitting device passes through the uniform light cover, the spectral irradiance at a position 1.5m away from the uniform light cover on the central axis of the lamp, at the location of the maximum peak value of the spectral power distribution in the visible light range, is greater than 7 times the spectral irradiance at the maximum peak value of the spectral power distribution in the wavelength range of 380nm-500nm; after the light emitted by the light-emitting device passes through the uniform light cover, the irradiance of the visible light at a position 1.5m away from the uniform light cover on the central axis of the lamp is less than 25w / m. 2 The light emitted by the light-emitting device, after passing through the uniform light cover, has an optimal spectral irradiance value of 0.3 W / m at a position 1.5 m away from the uniform light cover on the central axis of the lamp, where the spectral power distribution reaches its maximum peak value in the visible light range. 2 / nm-1.2w / m 2 Between / nm; the correlated color temperature of the light-emitting device is greater than 1200K.

[0012] In some examples, the light-emitting device includes at least two red LEDs with different maximum peak wavelengths, the difference between the two maximum peak wavelengths being greater than 25 nm; the red LEDs with different maximum peak wavelengths operate alternately according to a set period.

[0013] In some examples, the light-emitting device includes a multi-band LED, which is a phosphor-excited LED or an LED packaged from multiple primary color LED chips.

[0014] The light-emitting device includes two or more red LEDs. The spectral power distribution of the red LEDs has a maximum peak value, and the wavelength of the maximum peak value is located in the range of 620nm-780nm. In the working state, the total input power of all the red LEDs in operation is greater than 12W. The spectral power distribution of the light-emitting device has a maximum peak value, and the wavelength of the maximum peak value is located in the range of 600nm-780nm. At half the height of the maximum peak value of the spectral power distribution of the light emitted by the light-emitting device, the half-peak width is less than 45nm. The lamp also includes a light-diffusing cover. After the light emitted by the light-emitting device passes through the light-diffusing cover, at a position 1.5m away from the light-diffusing cover on the central axis of the lamp... The spectral irradiance of the maximum peak value of the spectral power distribution in the visible light range is more than 4 times greater than that of the maximum peak value of the spectral power distribution in the wavelength range of 380nm-500nm; after the light emitted by the light-emitting device passes through the homogenizer, at a position 1.5m away from the homogenizer on the central axis of the lamp, the spectral irradiance of the maximum peak value of the spectral power distribution in the visible light range is more than 1.5 times greater than that of the maximum peak value of the spectral power distribution in the wavelength range of 500nm-600nm; after the light emitted by the light-emitting device passes through the homogenizer, at a position 1.5m away from the homogenizer on the central axis of the lamp, the spectral irradiance of the maximum peak value of the spectral power distribution in the visible light range is 0.15w / m. 2 / nm-2.5w / m 2 Between / nm. The aforementioned structural design and parameter combination can effectively alleviate the occurrence and development of myopia in children while ensuring a relatively safe lighting environment. Lighting fixtures using this technology are effective and safe in alleviating myopia.

[0015] In some examples, after the light emitted by the light-emitting device passes through the uniform light cover, the spectral irradiance at a position 1.5m away from the uniform light cover on the central axis of the lamp, where the spectral power distribution reaches its maximum peak in the visible light range, is 0.2 W / m. 2 / nm-2.2w / m 2 The structural design and parameter combination provide a spectral irradiance range with optimal myopia mitigation effects.

[0016] In some examples, the correlated color temperature of the light emitted by the light-emitting device is greater than 800K; after passing through the homogenizer, the spectral irradiance of the light emitted by the light-emitting device at a position 1.5m away from the homogenizer on the central axis of the lamp, at the location of the maximum peak value of the spectral power distribution in the visible light range, is greater than 5 times the spectral irradiance of the maximum peak value of the spectral power distribution in the wavelength range of 380nm-500nm; after passing through the homogenizer, the irradiance of the visible light emitted by the light emitted by the light-emitting device at a position 1.5m away from the homogenizer on the central axis of the lamp, at the location of the homogenizer, is less than 45W / m². 2 The aforementioned structural design and parameter matching provide a relatively safe upper limit for irradiance and a more suitable proportion of spectral components.

[0017] In some examples, after the light emitted by the light-emitting device passes through the uniform light cover, the spectral irradiance at a position 1.5m away from the uniform light cover on the central axis of the lamp, where the spectral power distribution reaches its maximum peak in the visible light range, is 0.25w / m. 2 / nm-1.9w / m 2 Between / nm. The aforementioned structural design and parameter matching further optimize the spectral irradiance range for alleviating myopia.

[0018] In some examples, under operating conditions, the half-peak width at half the height of the maximum peak of the spectral power distribution of the light emitted by the light-emitting device is less than 35 nm; after passing through the uniform light cover, the visible light irradiance at a position 1.5 m away from the uniform light cover on the central axis of the lamp is less than 30 W / m². 2 The correlated color temperature of the light-emitting device is greater than 1050K. The structural design and parameter matching provide a superior spectral structure for alleviating myopia, a safer upper limit for irradiance, and a suitable lighting environment.

[0019] In some examples, under operating conditions, the half-peak width of the spectral power distribution of the light emitted by the light-emitting device is less than 30 nm at half the height of the maximum peak value; after the light emitted by the light-emitting device passes through the homogenizer, the optimal value of the spectral irradiance at a position 1.5 m away from the homogenizer on the central axis of the lamp, where the maximum peak value of the spectral power distribution in the visible light range is 0.3 W / m. 2 / nm-1.5w / m 2 Between / nm. The aforementioned structural design and parameter matching provide an optimal upper limit for the half-width at half-maximum (WHM) to alleviate myopia, as well as a better spectral irradiance range for myopia relief.

[0020] In some examples, under operating conditions, the proportion of light power within a 20 nm range of the wavelength of the maximum peak of the spectral power distribution emitted by the light-emitting device is greater than 60% for wavelengths radiated by the light-emitting device in the 620 nm-780 nm range. The proportion of beneficial light components in the spectral power distribution has been optimized.

[0021] In some examples, under operating conditions, the optical power of the light emitted by all the red LEDs has a wavelength range of 600nm-780nm and a light power range of 50W-200W. Considering both effectiveness and safety in alleviating myopia, the optimal optical power range for red LEDs is given.

[0022] In some examples, after the light emitted by the light-emitting device passes through the uniform light cover, the spectral irradiance at a position 1.5m away from the uniform light cover on the central axis of the lamp, at the location of the maximum peak value of the spectral power distribution in the visible light range, is greater than 7 times the spectral irradiance at the maximum peak value of the spectral power distribution in the wavelength range of 380nm-500nm; after the light emitted by the light-emitting device passes through the uniform light cover, the irradiance of the visible light at a position 1.5m away from the uniform light cover on the central axis of the lamp is less than 25w / m. 2 The light emitted by the light-emitting device, after passing through the uniform light cover, has an optimal spectral irradiance value of 0.3 W / m at a position 1.5 m away from the uniform light cover on the central axis of the lamp, where the spectral power distribution reaches its maximum peak value in the visible light range. 2 / nm-1.2w / m 2 The spectral parameters are between / nm; the correlated color temperature of the light-emitting device is greater than 1200K. The optimal range of spectral parameters for myopia relief and the safety limits are given.

[0023] In some examples, the light-emitting device includes at least two red LEDs with different maximum peak wavelengths, the difference between the two maximum peak wavelengths being greater than 25 nm; the red LEDs with different maximum peak wavelengths operate alternately according to a set cycle. This structural design and parameter combination can alleviate eye strain caused by long-term exposure to red LEDs with a single maximum peak wavelength.

[0024] In some examples, the light-emitting device includes a multi-band LED, which is a phosphor-excited LED or an LED packaged from multiple primary color LED chips. This technology involves integrating a single red LED chip with other primary color LED chips into a single LED package to form a multi-band LED that includes the single red LED chip. For example, four LED chips (red, green, blue, and yellow) can be integrated into a multi-color LED package, where the peak wavelength of the single red LED chip is the same as the maximum peak wavelength of the multi-color LED package. Another form of this technology involves the single red LED chip and the multi-band LED belonging to different LED packages; for example, a single red LED package and a white LED package can be used together in a lighting fixture. Using a single red LED in combination with a multi-band LED is a safe, effective, and cost-effective solution.

[0025] All parameter values ​​involved in this application refer to the values ​​of the luminaire under normal working conditions. When the luminaire is in an abnormal working state or in a working state that does not significantly benefit myopia relief, some parameter values ​​may deviate from the technical requirements of this disclosure. For example, a luminaire has two functional working modes: one is a myopia relief lighting mode using the technology of this disclosure, and the other is a normal lighting mode; the working mode using the technology of this disclosure can effectively relieve myopia, while the other working mode, which does not conform to this technology, has no obvious effect on relieving myopia; this example luminaire integrates two working modes and still uses the myopia relief technology provided in this application.

[0026] The wavelength of the maximum peak value mentioned in this text refers to the wavelength corresponding to the position of the maximum peak value in the spectral power distribution. For visible light described in this application, unless a wavelength range is explicitly given, the default wavelength range is electromagnetic waves between 380nm and 780nm. After light is emitted from the light-emitting device, it may pass through structures such as light guide plates and lamp covers. It is recommended that the transmission elements through which the light passes before exiting the light diffuser be colorless or matte white, as this has minimal impact on the color temperature of the illumination. The correlated color temperature radiated by the light-emitting device is approximately equal to the correlated color temperature of the lamp during operation.

[0027] Regarding the unit of spectral irradiance, this application uses w / m². 2 / nm; sometimes written as w / (m 2 The units ·nm can be considered different written forms of the same unit. The multi-band light mentioned refers to mixed light that includes both blue and green light, not monochromatic light; this type of multi-band light can be obtained by coating blue LEDs with phosphors, or by using a combination of blue and green monochromatic LEDs. The lamps described for alleviating myopia in children can be made by using a combination of multi-band light sources and monochromatic red LEDs.

[0028] In different literature, "w / m 2 The parameter “ / nm” has several different names; in this application, “spectral irradiance” corresponds to the unit “w / m”. 2 / nm". In different documents, "w / m" appears... 2 The corresponding parameter has several different names; in this application, "irradiance" corresponds to the unit "w / m²". 2 The technical content of this application will be explained based on these names and correspondences.

[0029] All radiation-related parameters mentioned in this article, including spectral irradiance, optical power, wavelength of maximum peak, correlated color temperature, and spectral irradiance of maximum peak in spectral power distribution, refer to parameters of the luminaire under operating conditions. LEDs are light-emitting diodes, also known as LED chips. After being packaged, LEDs are called LED packages; the LEDs mentioned in this article refer to LED packages.

[0030] The red LED described in this application refers to an LED package with a maximum peak in its spectral power distribution, and the wavelength of the maximum peak is located in the range of 620nm-780nm. Some literature considers light in the 700nm-780nm range to be infrared light, and 620nm to be orange light. For ease of distinction and description, this application refers to LEDs whose maximum peak wavelength is located in the approximately red light region of 620nm-780nm as red LEDs. The single red LED described in this application is an LED containing only one type of monochrome LED chip, and the peak wavelength of the LED chip is located in the range of 620nm-780nm. For example, a single red LED package contains only one type of LED chip with a peak wavelength of 650nm, and the package does not contain chips with other peak wavelengths. Normal tolerance fluctuations in the peak wavelength of the same type of chip are allowed due to manufacturing reasons.

[0031] The light-emitting device includes two or more red LEDs, and the spectral power distribution of the red LEDs has a maximum peak value, the wavelength of which is located in the range of 620nm-780nm. This means that the light-emitting device must include two or more red LEDs whose maximum peak value wavelength is located in the range of 620nm-780nm. Whether the light-emitting device also includes LEDs with other performance parameters is not required; it may or may not include them.

[0032] When measuring the physical product parameters of the luminaire disclosed herein, if the measurement result of the parameter changes with position, meaning that position is a variable affecting the measurement result, the measurement position should be selected based on the measurement result at a position 1.5 meters away from the diffuser on the central axis of the luminaire. When the unit of spectral coordinates is not specified in the text, the default unit for the vertical axis is w / m. 2 / nm, where the horizontal axis is in nm.

[0033] The parameters mentioned in this article, including optical power, spectral irradiance, and wavelength of maximum peak value, all refer to the parameter configuration under normal operating conditions of the luminaire. The optical power mentioned in this article refers to the radiated power of electromagnetic waves; when "power" in this article refers to electrical power, it defaults to the input electrical power of the light-emitting element, which can be obtained by multiplying the current and voltage passing through the light-emitting element, or roughly estimated from the optical power of the spectrum.

[0034] The lighting provided by the lamps designed to alleviate myopia in children has a smaller half-width and a smaller total power of light entering the eye compared to natural outdoor light; the total power of light entering the eye can be determined by the irradiance value (unit: W / m²) at the eye location. 2 The aforementioned lamp for alleviating childhood myopia, compared to red light myopia therapy devices, has a lower maximum peak power of incoming light, which can be determined by the spectral irradiance value (unit: W / m²) of the maximum peak value of the spectral power distribution at the point of entry into the eye.2 The technology of this application simulates the beneficial light effects of outdoor sunlight on the human eye while illuminating the light. This simulation is an effectiveness simulation rather than a simple spectral simulation, thereby achieving a safe and easy-to-use effect in alleviating the occurrence and development of myopia in children. Attached Figure Description

[0035] Figure 1 This is a schematic diagram showing the location for measuring spectral parameters according to an embodiment of the present disclosure. The diagram indicates a position 1.5 meters from the uniform light cover on the central axis of the lamp.

[0036] Figure 2 This is a schematic diagram showing the maximum peak value and half-peak width (WHM) of an embodiment of the present disclosure. The maximum peak value, the wavelength of the maximum peak value, and the WHM are indicated.

[0037] Figure 3 This is a schematic diagram of the half-peak width provided in an embodiment of the present disclosure. The maximum peak value of the spectral power distribution and the half-peak width are indicated.

[0038] Figure 4 This is a schematic diagram illustrating the maximum peak value in the wavelength range of 380nm-500nm provided in an embodiment of this disclosure. It shows the maximum peak value of the spectral power distribution of light emitted by the light-emitting device in the wavelength range of 380nm-500nm and the maximum peak value in the visible light range.

[0039] Figure 5 This is a schematic diagram showing the position of the maximum peak wavelength plus or minus 20 nm according to an embodiment of this disclosure. It illustrates the wavelength position of the maximum peak of the spectral power distribution of a red LED and the wavelength position of the maximum peak wavelength plus or minus 20 nm.

[0040] Figure 6 This is a schematic diagram of a multi-color LED package for a lamp designed to alleviate myopia in children, as proposed in this disclosure.

[0041] In the attached diagram: 1. Power interface; 2. Housing; 3. Light-emitting device; 4. Light-diffusing cover; 5. Single red LED chip; 6. Single blue LED chip; 7. Single green LED chip; 8. Single yellow LED chip. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure. Unless otherwise defined, the technical or scientific terms used in this disclosure should have the ordinary meaning understood by those with general skills in the art to which this disclosure pertains. The terms "first," "second," and similar words used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Words such as "comprising" or "including" mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects. Words such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0043] This disclosure provides a lamp for alleviating myopia in children, including a power interface (1), a housing (2), and a light-emitting device (3); the light-emitting device (3) includes two or more red LEDs, the spectral power distribution of the red LEDs has a maximum peak value, the wavelength of the maximum peak value is in the range of 620nm-780nm; in the working state, the total input power of all the red LEDs in operation is greater than 12W; the spectral power distribution of the light-emitting device (3) has a maximum peak value, the wavelength of the maximum peak value is in the range of 600nm-780nm; at half the height of the maximum peak value of the spectral power distribution of the light emitted by the light-emitting device (3), the half-peak width is less than 45nm; the lamp also includes a light-diffusing cover (4); the light emitted by the light-emitting device (3) passes through the light-diffusing cover (4), At a position 1.5m away from the uniform light cover (4) on the central axis of the lamp, the spectral irradiance of the maximum peak value of the spectral power distribution in the visible light range is 4 times greater than that of the maximum peak value of the spectral power distribution in the wavelength range of 380nm-500nm; after the light radiated by the light-emitting device (3) passes through the uniform light cover (4), at a position 1.5m away from the uniform light cover (4) on the central axis of the lamp, the spectral irradiance of the maximum peak value of the spectral power distribution in the visible light range is 1.5 times greater than that of the maximum peak value of the spectral power distribution in the wavelength range of 500nm-600nm; after the light radiated by the light-emitting device (3) passes through the uniform light cover (4), at a position 1.5m away from the uniform light cover (4) on the central axis of the lamp, the spectral irradiance of the maximum peak value of the spectral power distribution in the visible light range is 0.15w / m 2 / nm-2.5w / m 2 Between / nm.

[0044] The uniform light cover (4) is connected to the outer shell (2) to form a cavity, and the light-emitting device (3) is set inside the cavity.

[0045] In some examples, after the light emitted by the light-emitting device (3) passes through the uniform light cover (4), the spectral irradiance at a position 1.5m away from the uniform light cover (4) on the central axis of the lamp, where the spectral power distribution reaches its maximum peak value in the visible light range, is 0.2w / m. 2 / nm-2.2w / m 2 Between / nm.

[0046] In some examples, the correlated color temperature of the light-emitting device is greater than 800K; after the light emitted by the light-emitting device (3) passes through the uniform light cover (4), the spectral irradiance at a position 1.5m away from the uniform light cover (4) on the central axis of the lamp has a maximum peak value in the visible light range that is more than 5 times greater than the spectral irradiance at a position 1.5m away from the uniform light cover (4) on the central axis of the lamp; after the light emitted by the light-emitting device (3) passes through the uniform light cover (4), the irradiance of the visible light at a position 1.5m away from the uniform light cover (4) on the central axis of the lamp has a maximum peak value in the visible light range that is more than 5 times greater than the spectral irradiance ... 2 .

[0047] In some examples, after the light emitted by the light-emitting device (3) passes through the uniform light cover (4), the spectral irradiance at a position 1.5m away from the uniform light cover (4) on the central axis of the lamp, where the spectral power distribution reaches its maximum peak in the visible light range, is 0.25w / m. 2 / nm-1.9w / m 2 Between / nm.

[0048] In some examples, under operating conditions, the half-peak width of the spectral power distribution of the light emitted by the light-emitting device (3) is less than 35 nm at half the height of the maximum peak; after the light emitted by the light-emitting device (3) passes through the uniform light cover (4), the visible light irradiance at a position 1.5 m away from the uniform light cover (4) on the central axis of the lamp is less than 30 W / m. 2 The correlated color temperature of the light-emitting device is greater than 1050K.

[0049] In some examples, under operating conditions, the half-peak width of the spectral power distribution of the light emitted by the light-emitting device (3) is less than 30 nm at half the height of the maximum peak value; after the light emitted by the light-emitting device (3) passes through the uniform light cover (4), the optimal value of the spectral irradiance of the maximum peak value of the spectral power distribution in the visible light range at a position 1.5 m away from the uniform light cover (4) on the central axis of the lamp is 0.3 W / m. 2 / nm-1.5w / m 2 Between / nm.

[0050] In some examples, under operating conditions, the light power ratio of the light source (3) within the wavelength range of the maximum peak of the spectral power distribution plus or minus 20 nm is greater than 60% of the light power of the light source (3) within the wavelength range of 620 nm to 780 nm.

[0051] In some examples, under operating conditions, the wavelength of the light emitted by all the red LEDs is in the range of 600nm-780nm, and the optical power is in the range of 50W-200W.

[0052] In some examples, after the light emitted by the light-emitting device (3) passes through the uniform light cover (4), the spectral irradiance at a position 1.5m away from the uniform light cover (4) on the central axis of the lamp, where the spectral power distribution peak value in the visible light range is greater than 7 times the spectral irradiance at a position 1.5m away from the uniform light cover (4) on the central axis of the lamp, is less than 25w / m². 2 The light emitted by the light-emitting device (3) passes through the uniform light cover (4), and at a position 1.5m away from the uniform light cover (4) on the central axis of the lamp, the optimal value of the spectral irradiance with the maximum peak value of the spectral power distribution in the visible light range is 0.3w / m. 2 / nm-1.2w / m 2 Between / nm; the correlated color temperature of the light-emitting device is greater than 1200K.

[0053] In some examples, the light-emitting device (3) includes at least two red LEDs with different maximum peak wavelengths, the difference between the two maximum peak wavelengths being greater than 25 nm; the red LEDs with different maximum peak wavelengths work in rotation according to a set period.

[0054] For example, there are red LEDs with two maximum peak wavelengths: one with a maximum peak wavelength of 650nm and the other with a maximum peak wavelength of 680nm. The LED can be switched every 3 hours, alternating between the two types. This reduces the risk of eye fatigue or damage caused by prolonged use of electromagnetic waves at a single maximum peak wavelength. The maximum peak wavelength refers to the wavelength length at the maximum peak. The maximum peak value of an LED refers to the value of the highest peak among all peaks in the LED spectrum. A single red LED chip has only one peak, so the peak value of a single red LED chip is its maximum peak value. Unless otherwise specified, the LED chips described in this article are monochromatic LED chips, meaning their spectra have only one peak.

[0055] In some examples, the light-emitting device (3) includes a multi-band LED, which is a phosphor-excited LED or an LED packaged from multiple primary color LED chips.

[0056] In some examples, the light-emitting device includes a single red LED packaged with an LED chip having a peak wavelength of 650nm, and also includes white LEDs excited by phosphors. This mixture of single-band red light and multi-band white light constitutes the main light radiated by the light-emitting device. During the manufacturing process, the total rated power of the single red LEDs in the luminaire can be changed by adjusting the rated power and number of individual red LEDs; similarly, the total rated power of the white LEDs in the luminaire can be changed by adjusting the rated power and number of individual white LEDs. For luminaires in operation, it is recommended that the input power be slightly less than the rated power, and it is not recommended that the input power exceed the rated power.

[0057] In some examples, the lamp has several operating modes, one of which meets the technical requirements for myopia relief as described in this application and has a significant myopia relief effect. Users can activate this myopia relief operating mode via an option button (which can be a physical button or a menu button on the screen). This lamp is the myopia relief lamp described in this application. The myopia relief operating mode refers to the operating mode of the lamp that meets the technical requirements of this application and achieves the purpose of myopia relief.

[0058] In some examples, the luminaire includes automatically switching sub-modes, such as normal lighting mode when the light is turned on, and automatically switching to myopia relief working mode after 10 seconds. In myopia relief working mode, the luminaire works continuously for a set time to achieve the purpose of relieving myopia. In this case, the luminaire is the myopia relief luminaire for children described in this application.

[0059] In some examples, the stepless dimming lamp has a preset function area for the parameter index of myopia relief as described in this application. According to the operation instructions, the user can adjust to the function area to enter the myopia relief working mode. Then this lamp is the lamp for relieving myopia in children as described in this application.

[0060] However, prior to this disclosure, manufacturers and users of stepless dimming lamps on the market lacked the myopia relief technology and concepts of this disclosure. There was no specific hardware or software design for myopia relief using the technology of this disclosure, and the lamps did not have precisely defined parameter ranges as disclosed in this disclosure for myopia relief. Blindly adjusting the lamps during use would not effectively achieve the goal of myopia relief, and unreasonable lighting parameters might damage the eyes. Therefore, such lamps do not fall under the category of myopia relief lamps for children as described in this application.

[0061] While meeting the technical requirements of this disclosure, it is not required that all parameters of the lamps manufactured in different batches be strictly consistent, and differences in lamp parameters due to reasonable fluctuations in the parameters of components from different batches are allowed. For example, to manufacture a lamp that meets the requirements of claim 9: at a position 1.5m away from the uniform light cover on the central axis of the lamp, the spectral irradiance of the maximum peak value of the spectral power distribution in the visible light range is greater than 7 times the spectral irradiance of the maximum peak value of the spectral power distribution in the wavelength range of 380nm-500nm, and the irradiance of the visible light is less than 25w / m². 2 The optimal value of spectral irradiance with the maximum peak value of spectral power distribution in the visible light range is 0.3 W / m. 2 / nm-1.2w / m 2 Between / nm; the correlated color temperature of the light-emitting device is greater than 1200K. For lamps manufactured from components purchased in batch A, a sample of one lamp, under normal operating conditions, had a total input power of 147W for a single red LED with a wavelength of 650nm and a total input power of 83W for a white LED. The total visible light irradiance measured at 1.5 meters from the diffuser along the central axis of the lamp was 17W / m². 2 The spectral irradiance at the maximum peak of the spectral power distribution is 0.5 W / m². 2 / nm; the half-width at half-maximum (WHM) of the radiation spectrum is 23nm, and the correlated color temperature is approximately 1600K; the spectral irradiance of the maximum peak value of the spectral power distribution of the radiant device is approximately 26 times that of the maximum peak value of the spectral power distribution of the radiant light in the wavelength range of 380nm-500nm. For lamps manufactured from components purchased in batch B, a sample of one lamp, under normal operating conditions, had a total input power of 138W for a single red LED with a wavelength of 650nm and a total input power of 83W for a white LED. The total visible light irradiance measured at a distance of 1.5 meters from the diffuser along the central axis of the lamp was 15.5W / m². 2 The spectral irradiance at the maximum peak of the spectral power distribution is 0.47 W / m². 2 / nm; the half-width of the spectral peak of the radiation is 23nm, and the correlated color temperature is approximately 1650K; the spectral irradiance of the maximum peak value of the spectral power distribution of the luminescent device is approximately 24 times that of the maximum peak value of the spectral power distribution of the luminescent light in the wavelength range of 380nm-500nm. Other indicators of the A and B batches of lamps also meet the requirements of this application. It can be seen that although the parameters of the two purchased devices differ, both meet the technical requirements of claim 9, therefore both types of lamps can achieve a good effect in alleviating myopia.

[0062] The luminous efficacy of 650nm single-red LEDs varies significantly between different manufacturers, as does that of white LEDs; even within the same manufacturer and model, different batches of LEDs exhibit fluctuations in parameters. Different diffusers and drivers also affect the light parameters radiated by the luminaire. Those skilled in the art can adjust the configuration of luminaire components based on the technical content provided in this disclosure to meet the technical solutions specified herein and achieve the corresponding effect of alleviating myopia. If a sampled luminaire of the same model uses the technology of this application, it can be concluded that the remaining luminaires not sampled also use the technology of this application.

[0063] The power configurations of the red and white LEDs in the embodiments, as well as the measurement results, are for reference by those skilled in the art. LEDs purchased from different sources may produce slightly different results. When it is necessary to adjust a parameter, such as adjusting the color temperature to 1050K, or adjusting the spectral irradiance at the maximum peak of the spectral power distribution to 0.8 W / m², adjustments may be necessary. 2 / nm, which can be achieved by those skilled in the art through adjusting the number and ratio of single red LEDs and white LEDs in the luminaire. The smaller the half-peak width of the red LED, the smaller the half-peak width of the luminaire. It is recommended to use red LEDs with smaller half-peak widths to achieve better myopia relief.

[0064] This application creatively provides specific requirements for the parameters of lighting fixtures to achieve the effect of alleviating myopia. Those skilled in the art can manufacture lighting fixtures based on the technical content provided in this application to achieve the goal of alleviating myopia in children. Using the technology disclosed in this application as the core and guidance, those skilled in the art can fully complete the hardware debugging of the lighting fixtures by combining common knowledge in the field, achieving the required parameter range to alleviate myopia, without requiring additional creative work.

[0065] To enable those outside the field to fabricate the aforementioned myopia-relieving lamp, the following reiterates some basic and commonly used knowledge regarding hardware debugging. Select a red LED, for example, a single red LED with a peak wavelength of 650nm. Adjust the total input power of the single red LED so that the spectral irradiance at the maximum peak value at a position 1.5m away from the uniform light cover on the central axis of the lamp is close to the desired value. A narrower half-peak width (WHM) for the red LED is better; for example, select a single red LED with a WHM width of less than 20nm. Select a multi-band light source, such as a phosphor-excited white LED. Increasing the total input power of the white LED increases the correlated color temperature (CCT) of the light-emitting device. Selecting a white LED with a higher CCT will also increase the CCT of the light-emitting device. Selecting a white LED with a smaller blue light peak value increases the ratio of the maximum peak value to the blue light peak value. Decreasing the total input power of the light-emitting device reduces the visible light irradiance.

[0066] For example, a certain lamp's light-emitting device includes a single red LED with a total input power of 138W and a white LED with a total input power of 83W. When it is necessary to increase the lamp's maximum peak spectral irradiance, the total input power of the single red LED can be increased; when it is necessary to manufacture a light-emitting device with a higher correlated color temperature, the total input power of the white LED can be increased. Based on the aforementioned fundamental knowledge in the art and the technology provided in this application, lamps that meet the parameter specifications of the myopia-relieving lamps disclosed herein can be manufactured. It is recommended to use white LEDs with smaller peak values ​​and smoother spectral lines; light with smaller peak values ​​and smoother spectral lines in the 380nm-600nm wavelength range causes less adverse stimulation to the fundus.

[0067] The term "red LED" refers to an LED whose wavelength of maximum spectral power distribution is located in the range of 620nm-780nm, without limitation on whether it includes electromagnetic waves in other wavelengths besides red light; it may or may not include other visible light besides red light. This application names LEDs with wavelengths of maximum spectral power distribution located in the broad red light band of 620nm-780nm as "red LEDs" for ease of differentiation from other LEDs. There are many types of light sources on the market, each with its own unique spectrum; however, for red LEDs alone, the variety of spectra is so vast that there are no precise statistics; even LEDs of the same model produced in different batches may have slight differences in spectrum. Therefore… Figure 2 , Figure 3 , Figure 4 and Figure 5 The spectral diagrams shown are schematic diagrams intended to aid understanding of the textual expressions in the requirements. These schematic spectral diagrams do not represent the spectrum of any specific light source. The lamps described for alleviating myopia in children are lamps constructed in accordance with the technical conditions proposed in the claims, while allowing for differences in the details of the spectral diagrams of individual lamps. The schematic diagrams are broadly representative figures provided for the reader's convenience and are not actual measured figures.

[0068] like Figure 1 As shown, the location 1.5m away from the light diffuser on the central axis of the luminaire is marked. In this application, the parameters for the measurement location are not specified; when a location must be given for measurement, the default measurement location is... Figure 1 The distance shown is 1.5m from the diffuser. However, if a simpler and more accurate method exists for measuring this parameter, and the result is independent of location—for example, measuring the input power of a red LED by measuring the current and voltage with a multimeter—the input power can be directly calculated, which is simpler and more accurate than measuring and converting at 1.5 meters. In this case, such a parameter does not need to be measured at 1.5 meters. For some parameters, the measurement result changes with location. The default measurement position for such parameters is 1.5 meters from the diffuser on the central axis of the luminaire, for example, irradiance (w / m²). 2 ).

[0069] like Figure 2 The spectral diagram shows the wavelength position of the maximum peak of the spectral power distribution; it also shows the half-peak width at half the height of the maximum peak. The half-peak width at half the height of the maximum peak is the distance between A and B. The distance between B and C is not the half-peak width; the wavelength between points B and C is not continuous, lacking the light in the band between A and D. B and C spans the half-peak width of two peaks. The half-peak width at half the height of the maximum peak as described in this application refers to the width of the continuous electromagnetic wave at half the height of the maximum peak.

[0070] Some literature uses "half-peak width" or "half-peak width" to describe the properties of monochromatic light. The "half-peak width" used in this application can be used to describe the half-peak width of multi-band electromagnetic waves. If there are any differences from other individual literature descriptions, the term "half-peak width" used in this application shall be based on the definition of half-peak width in this application.

[0071] This application defines the half-peak width (WHM) as the range of wavelengths with continuous electromagnetic wave distribution at half the height of the maximum peak in a coordinate graph of spectral power distribution. For example... Figure 2 The AB distance in the figure is the half-peak width, for example Figure 3 The EF distance in the equation is the half-peak width. However, Figure 2 The BC distance is not the full width at half maximum (FWHM) because the wavelengths are discontinuous.

[0072] like Figure 4 The spectral diagram illustrates the following technical features: (a) The radiation from the light-emitting device includes multi-band light within the wavelength range of 380nm-500nm; the spectrum may be missing some wavelengths, such as the 380nm-382nm wavelength range shown in the diagram. (b) Within the wavelength range of 380nm-500nm, the spectral irradiance at the maximum peak of the spectral power distribution is less than 0.1w / m². 2 / nm. (c) The spectral irradiance of the maximum peak value of the spectral power distribution emitted by the light-emitting device is greater than 5 times the spectral irradiance of the maximum peak value of the spectral power distribution emitted by the light-emitting device in the wavelength range of 380nm-500nm.

[0073] Figure 4 Similarly, the spectral irradiance of the maximum peak value of the spectral power distribution of the visible light emitted by the light-emitting device is 1.5 times greater than the spectral irradiance of the maximum peak value of the spectral power distribution of the light-emitting device in the wavelength range of 500nm-600nm.

[0074] like Figure 5The spectral diagram shows that the light power ratio of the red LED within a wavelength range of 20 nm plus or minus the maximum peak value of its spectral power distribution is greater than 60% within the 620 nm-780 nm range. This light power ratio is equivalent to... Figure 5 The ratio of the area covered by the spectral curve in the spectrum; that is, the ratio of the light power within the wavelength range of plus or minus 20 nm of the maximum peak value of the red LED spectral power distribution to the light power within the wavelength range of 620 nm-780 nm, is equivalent to dividing the area covered by the spectral curve within the wavelength range of plus or minus 20 nm of the maximum peak value of the spectral power distribution in the spectrum by the area covered by the spectral curve within the 620 nm-780 nm range. The power area covered by the spectral curve can be determined by... Figure 5 The ordinate of the spectral curve is obtained by integrating the changes in the abscissa. When precise results are not required, a qualitative result can be obtained by roughly estimating this ratio, for example... Figure 5 Based on rough estimation, it can be concluded that the spectral curve coverage area of ​​light within a wavelength range of 20nm plus or minus the maximum peak wavelength is greater than 60% of the spectral curve coverage area in the 620nm-780nm wavelength range. The default position for actual measurement is on the central axis of the lamp, at a distance of 1.5m from the light uniform cover.

[0075] like Figure 6 A schematic diagram of a multi-color LED chip package is shown below. For example, a single red LED chip and three single-color LED chips (blue, green, and yellow) are packaged within a single LED chip. In other words, a single red LED chip and other single-color LED chips are integrated into one LED chip, forming a new multi-band light source. By configuring the number and power of each primary color LED within the LED chip, the wavelength of the maximum peak of the LED's spectral power distribution is located in the 620nm-780nm range, and the full width at half maximum (FWHM) of the spectrum is less than 30nm.

[0076] This application discloses a lamp for alleviating myopia in children that contains red light components that are beneficial for preventing and treating myopia. This addresses the shortcomings of existing lamps that only provide illumination but cannot prevent or treat myopia in children, allowing children to prevent and treat myopia in a lit environment. This lamp for alleviating myopia in children has relatively low-energy red light and a long illumination time, solving the problem that current red light myopia treatment devices have a concentrated wavelength range and concentrated energy, which can easily cause overload pressure or even damage to the corresponding cone cells.

[0077] The following points need to be explained: (1) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure. Other structures can be referred to the general design.

[0078] (2) Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0079] (3) Unless otherwise specified, the wavelength of the maximum peak value of the spectral power distribution refers to the wavelength of the maximum peak value of the spectral power distribution in the visible light range emitted by the luminescent body. When a wavelength range is given, the wavelength of the maximum peak value of the spectral power distribution described refers to the wavelength of the maximum peak value of light in this range, for example, the wavelength of the maximum peak value of the spectral power distribution in the wavelength range of 380nm-500nm.

[0080] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A lamp for alleviating myopia in children, comprising a power interface, a housing, and a light-emitting device, characterized in that, The light-emitting device includes two or more red LEDs. The spectral power distribution of the red LEDs has a maximum peak value, and the wavelength of the maximum peak value is located in the range of 620nm-780nm. In the working state, the total input power of all the red LEDs in operation is greater than 12W. The spectral power distribution of the light-emitting device has a maximum peak value, and the wavelength of the maximum peak value is located in the range of 600nm-780nm. At half the height of the maximum peak value of the spectral power distribution of the light emitted by the light-emitting device, the half-peak width is less than 45nm. The lamp also includes a light-diffusing cover. After the light emitted by the light-emitting device passes through the light-diffusing cover, at a position 1.5m away from the light-diffusing cover on the central axis of the lamp... The spectral irradiance of the maximum peak value of the spectral power distribution in the visible light range is more than 4 times greater than that of the maximum peak value of the spectral power distribution in the wavelength range of 380nm-500nm; after the light emitted by the light-emitting device passes through the homogenizer, at a position 1.5m away from the homogenizer on the central axis of the lamp, the spectral irradiance of the maximum peak value of the spectral power distribution in the visible light range is more than 1.5 times greater than that of the maximum peak value of the spectral power distribution in the wavelength range of 500nm-600nm; after the light emitted by the light-emitting device passes through the homogenizer, at a position 1.5m away from the homogenizer on the central axis of the lamp, the spectral irradiance of the maximum peak value of the spectral power distribution in the visible light range is 0.15w / m. 2 / nm-2.5w / m 2 Between / nm.

2. The lamp for alleviating myopia in children according to claim 1, characterized in that, The light radiated by the light-emitting device, after passing through the uniform light cover, exhibits a spectral irradiance of 0.2 W / m² at a position 1.5 m away from the uniform light cover along the central axis of the lamp, where the spectral power distribution reaches its maximum peak value in the visible light range. 2 / nm-2.2w / m 2 Between / nm.

3. A lamp for alleviating myopia in children according to claim 2, characterized in that, The correlated color temperature of the light emitted by the light-emitting device is greater than 800K; after passing through the uniform light distribution cover, the spectral irradiance of the light emitted by the light-emitting device at a position 1.5m away from the uniform light distribution cover on the central axis of the lamp is greater than 5 times the spectral irradiance of the maximum peak value of the spectral power distribution in the wavelength range of 380nm-500nm; after passing through the uniform light distribution cover, the irradiance of the visible light emitted by the light emitted by the light-emitting device at a position 1.5m away from the uniform light distribution cover on the central axis of the lamp is less than 45w / m². 2 .

4. A lamp for alleviating myopia in children according to claim 3, characterized in that, The light radiated by the light-emitting device, after passing through the uniform light cover, exhibits a spectral irradiance of 0.25 W / m at a position 1.5 m away from the uniform light cover on the central axis of the lamp, where the spectral power distribution reaches its maximum peak value in the visible light range. 2 / nm-1.9w / m 2 Between / nm.

5. A lamp for alleviating myopia in children according to claim 4, characterized in that, In operation, the half-peak width of the spectral power distribution of the light emitted by the light-emitting device is less than 35 nm at half the height of the maximum peak; after passing through the uniform light cover, the visible light irradiance at a position 1.5 m away from the uniform light cover on the central axis of the lamp is less than 30 W / m². 2 The correlated color temperature of the light-emitting device is greater than 1050K.

6. A lamp for alleviating myopia in children according to claim 5, characterized in that, In operation, the half-peak width of the spectral power distribution of the light emitted by the light-emitting device is less than 30 nm at half the height of the maximum peak value; after passing through the uniform light cover, the optimal value of the spectral irradiance at the maximum peak value of the spectral power distribution in the visible light range at a position 1.5 m away from the uniform light cover on the central axis of the lamp is 0.3 W / m. 2 / nm-1.5w / m 2 Between / nm.

7. A lamp for alleviating myopia in children according to claim 6, characterized in that, In operation, the proportion of light power within a wavelength range of plus or minus 20 nm from the maximum peak value of the spectral power distribution radiated by the light-emitting device is greater than 60% of the light power radiated by the light-emitting device in the wavelength range of 620 nm-780 nm.

8. A lamp for alleviating myopia in children according to claim 7, characterized in that, In operation, the wavelength of all the red LEDs emitted is in the range of 600nm-780nm, and the light power is in the range of 50W-200W.

9. A lamp for alleviating myopia in children according to claim 6, characterized in that, The light emitted by the light-emitting device, after passing through the uniform light cover, has a spectral irradiance at a position 1.5m away from the uniform light cover on the central axis of the lamp, where the peak value of the spectral power distribution in the visible light range is greater than 7 times the spectral irradiance at the peak value of the spectral power distribution in the wavelength range of 380nm-500nm; the visible light irradiance at a position 1.5m away from the uniform light cover on the central axis of the lamp is less than 25w / m². 2 ; The light radiated by the light-emitting device, after passing through the uniform light cover, has an optimal spectral irradiance value of 0.3 W / m at a position 1.5 m away from the uniform light cover on the central axis of the lamp, where the spectral power distribution reaches its maximum peak value in the visible light range. 2 / nm-1.2w / m 2 Between / nm; the correlated color temperature of the light-emitting device is greater than 1200K.

10. A lamp for alleviating myopia in children according to any one of claims 1-9, characterized in that, The light-emitting device includes at least two types of red LEDs with different maximum peak wavelengths, and the difference between the two maximum peak wavelengths is greater than 25 nm; the red LEDs with different maximum peak wavelengths work in rotation according to a set period.

11. A lamp for alleviating myopia in children according to any one of claims 1-9, characterized in that, The light-emitting device includes multi-band LEDs, which are phosphor-excited LEDs or LEDs packaged from multiple primary color LED chips.

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