30results about How to "Reduce blue light hazards" patented technology

The invention provides a white light LED packaging structure, and the structure comprises a substrate, LED chips, and a wavelength conversion material layer. The structure is characterized in that thestructure comprises LED chips with at least two types of wavelengths, wherein the peak wavelength of one LED chip is within the range from 385nm to 425nm, and the peak wavelength of the other LED chip is greater than the peak wavelength of the first LED chip; the peak wavelength of the emission spectrum of the wavelength conversion material layer is within the range from 440nm to 700nm, and the wavelength conversion material layer absorbs the light emitted by the LED chips to emit white light.

The invention discloses an LED light-emitting device for repair and regeneration of retinal cells, comprising a base and an excitation light source, wherein the excitation light source is arranged onthe base. The excitation light source comprises an LED chip and a fluorescent powder layer. The LED chip is fixed on the base. The fluorescent powder layer comprises a silica gel layer, wherein fluorescent powder is dispersed in the silica gel layer, and the fluorescent powder layer is fixed on the end surface of the LED chip opposite to the base. The emission wavelength of the LED chip is 200-520nm, and that emission wavelength of the phosphor is 570nm-850nm. The invention also discloses the application of the LED light emitting device. The invention has the advantages that the far infrared light beneficial to vision health can be generated, the repair and regeneration of retinal cells can be promoted, and the harm of blue light can be reduced.

The invention relates to a method for realizing the low blue light hazard and high circadian rhythm factor light, and an LED light source. The method is advantaged in that the yellow phosphor and thegreen phosphor are excited by a blue chip and a violet chip of different main wavelength ranges to form the light. The method is advantaged in that the obtained light can not only reduce visual fatigue, but also reduce the blue light hazard, can further adjust the circadian rhythm factor, improve students' attention and enhance learning efficiency. According to the method described above, the LEDlight source can form the light with the low blue light hazard and the high circadian rhythm factor in the optical theory, in the structural process, the yellow phosphor, the green phosphor and the encapsulant are mixed, and uniformly coated on surfaces of the blue chip and the violet chip through the centrifugal process to uniformly excite the phosphor, a cup wall of a reflector cup is plated with silver, light reflection is improved, and the light output rate is improved.

The invention provides a light regulation method of a white light emitting diode. The method comprises the steps of: measuring spectral power of a red light-emitting diode, a yellow light-emitting diode, a blue light-emitting diode and a green light-emitting diode which independently emit light in a rated current working state; calculating the relative light mixing ratio of the red light-emittingdiode, the yellow light-emitting diode, the blue light-emitting diode and the green light-emitting diode; and according to the relative light mixing ratio, employing the control unit to output controlsignals with different duty ratios to the red light-emitting diode, the yellow light-emitting diode, the blue light-emitting diode and the green light-emitting diode, wherein the peak wavelength of the red light-emitting diode is between 670 nm and 700 nm. The white light emitting diode prepared by the method has high color rendering, low blue light hazard and the adjustable color temperature, and can be used for obtaining the white light emitting diode with the high color rendering and the low blue light hazard at any color temperature.

The invention provides a white LED light source and an LED lamp comprising the same. The spectrum of the white LED light source has a first spectrum peak in the wavelength range of 459-495nm and a second spectrum peak in the wavelength range of 400-450nm; a trough exists between the first spectrum peak and the second spectrum peak; and the white LED light source excites the fluorescent powder to emit light through a dual-wavelength blue light chip, so that the blue light hazard of the spectrum is remarkably reduced, the color rendering property is improved, and R6, R12 and the color fidelity Rf are improved. Meanwhile, the physiological effect is achieved, people feel comfortable and are facilitated to concentrate, and the learning and working efficiency is improved. The white LED light source is high in fitting degree coefficient of the spectrum and the same-color-temperature solar spectrum, has the advantages of being excellent in light color quality, low in blue light harm, high instability and low in cost, and can fully meet the performance requirements of the LED light source in the field of illumination.

The invention provides an anti-blue-ray printing ink, a display device and a manufacturing method of the display device, and relates to the technical field of displayers. The display device comprisesa display screen and an anti-blue-ray printing ink layer formed through the anti-blue-ray printing ink, wherein the anti-blue-ray printing ink layer is manufactured on a light-emitting surface of thedisplay screen. According to the anti-blue-ray printing ink, the display device and the manufacturing method of the display device provided by the invention, the blue ray hazard during the LED (Light-emitting Diode) display screen use process can be effectively reduced, the manufacturing process is simple, the treatment consistency is good, and the display screen can be protected.

The invention discloses an LED capable of removing harmful blue light and an LED illumination apparatus. According to a first scheme, the LED illumination apparatus comprises at least one low-color-temperature white light LED (8) and at least one LED (6) capable of removing harmful blue light, wherein the lights of the two LEDs are mixed to form white light at a color temperature of 3,000-5,000K; each LED (6) capable of removing harmful blue light comprises a blue light LED bare chip (1) and a lens (5), wherein a high-pass light filter (2) which is used for filtering short-wave blue light of less than 460nm is glued and fixed on the inner side wall or the outer side wall of the lens (5); according to a second scheme, the LED illumination apparatus comprises the at least one LED capable of removing harmful blue light, wherein each LED capable of removing harmful blue light comprises the blue light LED bare chip (1) and the lens (5); yellow fluorescent powder (3) covers the periphery of the blue light LED bare chip (1) in the lens (5) to enable the LED capable of removing harmful blue light to give out white light; and the high-pass light filter (2) which is used for filtering short-wave blue light of less than 460nm is glued and fixed on the inner side wall or the outer side wall of the lens (5). The LED and the LED illumination apparatus can be widely applied to the LED illumination field.

The invention relates to a backlight source with an OFED structure with composition of organic green light photoluminescence materials and organic red light photoluminescence materials and a display device. The backlight source comprises a PCB board and a plurality of LED luminescent devices which are arranged on the PCB board, each LED luminescent device comprises an LED chip and a photoluminescence layer which is arranged above the LED chip, and each photoluminescence layer comprises one or more kinds of organic green light photoluminescence materials and one or more kinds of organic red light photoluminescence materials. The invention further discloses the LED display device which comprises the backlight source. Compared with a traditional white light LED backlight source, on one hand,different organic photoluminescence materials are matched with each other, the color rendering index and color purity of spectrum are improved; on the other hand, a blue light LED chip which is largerthan 460 nanometers is adopted, the harm of blue light to the human eyes is lowered, and a healthy light source is achieved in the true sense. According to the technical scheme, the backlight sourcebrings significant innovation and revolution to the fields such as daily illumination, light sources and liquid crystal backlight sources.

The present invention provides an apparatus for reducing blue light hazard, including: a blue light source and a control module. The control module regulates the blue light source to emit a blue intermittent illumination in a fixed frequency, and a user who looks into the blue light source may perceive visual persistence effect via the blue intermittent illumination. On the other hand, the present invention also provides apparatus for reducing blue light hazard that utilize a polarizer or a phase adjusting device. Further, various methods for reducing blue light hazard are also provided.

The embodiment of the invention discloses a screen blue light adjusting method and device, an electronic device and a storage medium. The method comprises: acquiring the sunrise time of the current day, the sunset time of the current day and the sunrise time of the second day, a first time period being formed between the sunrise time of the current day and the sunset time of the current day, and asecond time period being formed between the sunset time of the current day and the sunset time of the second day; if the current moment belongs to the first time period, detecting the current ambientlight brightness, determining that the current ambient light brightness is smaller than a set light brightness threshold value, and controlling the current electronic device to enter a first preset blue light filtering mode; and if the current moment belongs to the second time period, controlling the current electronic device to enter a second preset blue light filtering mode. Blue light on the screen is filtered in a targeted mode, blue light harm is reduced to the maximum extent, and clear visual enjoyment is provided for users.

The invention provides an optical assembly and a lighting device and a table lamp using the same, and the optical assembly comprises a mounting part for mounting a light source; the light reflecting part is arranged on a light path of the light source; the light emitting part is arranged on a light path of the light source and comprises a sawtooth structure; wherein the mounting part is arranged between the light reflecting part and the light emitting part, and part of light emitted by the light source is reflected by the light reflecting part and then is irradiated out through the sawtooth structure, so that the illumination of the light source is uniform. The illumination uniformity of the table lamp is improved, meanwhile, the blue light harm of the table lamp is reduced, the photo-biological safety of the table lamp is greatly improved, the use experience of a user is improved, and eye health of the user is better guaranteed. Moreover, the LED lamp has good heat dissipation performance and insulation performance, long service life and high use safety, all the components are simple in structure, convenient to assemble, easy to produce and manufacture and convenient to popularize and use, and the LED lamp has extremely high economic value and social value.

The embodiment of the invention provides laminated glass and a head-up display system, and the laminated glass comprises an inner glass plate, a middle membrane and an outer glass plate, and one side, far away from the middle membrane, of the inner glass plate is provided with a first transparent nano-film used for reflecting P polarized light. The second transparent nano-film comprises at least one laminated structure formed by a high-refractive-index material layer and a low-refractive-index material layer which are sequentially deposited from the surface of the inner glass plate to the outside, a second transparent nano-film is arranged between the inner glass plate and the outer glass plate, the second transparent nano-film comprises dielectric layers and conductive layers, and each conductive layer is clamped between the two dielectric layers; the refractive index of the high-refractive-index material layer is larger than or equal to 1.9, the refractive index of the low-refractive-index material layer is smaller than or equal to 1.8, and the P polarized light reflectivity of the laminated glass is larger than or equal to 16% when the incident angle The P polarized light reflectivity of the laminated glass and the smoothness of the P polarized light reflection spectrum can be improved at the same time, and the brightness and the display comfort of a head-up display system adopting the laminated glass can be improved.