CN104633595B - A kind of with the LED lamp of high color rendering index (CRI) solar simulated - Google Patents

Abstract

The invention relates to an LED lamp which simulates sunlight with a high color rendering index, and belongs to the technical field of semiconductor lighting. The lamp includes an array of LED modules, the module consists of a red LED light-emitting chip (1), a green LED light-emitting chip (2), a blue LED light-emitting chip (3), a yellow LED light-emitting chip (4), an orange LED The light-emitting chip (5) and the white LED light-emitting chip (6) are mixed. The module is arranged in a 2×2 array in the lamp, and combined with the good light mixing structure of the lamp and the software light distribution system, it forms a color temperature between 2000K and 9000K. White LED lighting source device with continuously adjustable high color rendering index within a certain range. The color rendering index Ra is greater than 95. It has the advantages of high color rendering index, high reliability and convenient use. It is especially suitable for applications in lighting applications that require high color rendering index of lighting sources and adjustable light sources, such as textile printing and dyeing, fresh food and education promotion.

Description

An LED lamp that simulates sunlight with a high color rendering index

technical field

The invention is an LED lamp which simulates sunlight with a high color rendering index, and belongs to the technical field of semiconductor lighting.

Background technique

With the continuous improvement of luminous efficiency, white LEDs are more and more widely used. There are currently two main types of white LED lighting sources: one is to use blue LED chips and yellow-emitting phosphors that can be effectively excited by blue light to form white light. LED, a part of the blue light is absorbed by the phosphor, the phosphor is excited to emit yellow light, the emitted yellow light is mixed with the remaining blue light, and white light with various color temperatures can be obtained by adjusting their intensity ratio; the other uses red, green and blue LEDs Mix colors to form white light. Compared with traditional light sources, these two kinds of white light LED lighting sources have a significant defect that the color rendering index (Ra) is low. A light source with Ra greater than 90 has good color reproducibility and belongs to a high color rendering index light source. At present, the Ra of white LED lighting sources is generally between 70 and 80, which cannot meet the application requirements for high color reproducibility, such as textile printing and dyeing, fresh food and education promotion.

Phosphor powder technology leads to the low color rendering index of white LEDs due to the use of blue LED chips and yellow phosphor technology to form white light, and its spectrum has low spectral power density in the blue and red bands; the use of red, green and blue color mixing The resulting white light has a low color rendering index due to the discontinuous spectrum in the middle part of the band between red, green and blue light. After adding a variety of red, green, blue and orange LEDs with different wavelengths, this defect is made up, and the color rendering index of LED lamps can be significantly improved.

Contents of the invention

In order to solve the problems raised in the technical background, the present invention provides a sunlight-simulating LED lighting fixture with high color rendering index, high reliability and convenient use.

For achieving above object, the technical scheme that the present invention adopts is as follows:

An LED lamp that simulates sunlight with a high color rendering index, comprising a housing, a diffuser plate, an array of LED modules, a control circuit module (7), a drive circuit module (8) and a power supply module, the diffuser plate, the LED module The array, the control circuit module (7) and the drive circuit module (8) are arranged in the casing, the LED module array is controlled and driven by the control circuit module (7) and the drive circuit module (8), each of the The group of LED modules includes at least 4 kinds of LED light-emitting chips of different colors. By adjusting the brightness of the LED light-emitting chips of different colors, the output light can be continuously adjusted from 2000K to 9000K after being mixed by the diffuser plate, and its color rendering index Ra is greater than 95.

The LED module includes a red LED light emitting chip (1), a green LED light emitting chip (2), a blue LED light emitting chip (3), a yellow LED light emitting chip (4), an orange LED light emitting chip (5) and a white LED light-emitting chip (6).

The LED module array is at least one group, and the maximum power of a single module in the LED module array is 48W; The radiation emitted by an object emits the largest amount of radiation at a specific temperature and at a specific wavelength. Such as incandescent lamps in daily life, the power of each module is 15-27W.

The LED module array is one group, four groups or eight groups; the more the modules are, the larger the luminous area is; the more the modules are combined, the larger the light source is. A luminaire composed of one set of LED modules can be applied to camera module lens correction due to its high uniformity of illumination; a luminaire composed of four sets of LED modules has a larger lighting range and is easy to install, and can be applied to general functional lighting; Eight A lamp composed of a group of LED modules can be used to make a light box. The LED module array is one group, so that the uniformity of the light-emitting surface of the lamp is higher, or the LED module array is a group of eight groups, thereby increasing the light-emitting area of the lamp. The light-emitting area of the group to eight LED modules gradually increases.

The LED module array is four groups, arranged in a 2×2 matrix, and the colors of the LED light-emitting chips in each module are: two are different red LED light-emitting chips (1), and two are different Green LED chip (2), three different blue LED chips (3), one yellow LED chip (4), one orange LED chip (5), and two different white LED chips LED light-emitting chips (6), four groups of LED modules are arranged symmetrically in the lamp shell; each LED light-emitting chip is in a specific position according to the light distribution requirements, and each module can be reused for multiple times according to the light distribution requirements. The same kind of LED light-emitting chip.

The LED module array can be arranged in any form, and if there is a requirement for the uniformity of light emission of the lamps, it is recommended to use a symmetrical distribution.

According to the actual situation, LED light-emitting chips can be added or the light-emitting chips in the LED module can be replaced.

The brightness of each LED light-emitting chip in the module array can be adjusted, thereby adjusting the brightness and color temperature of the LED lamp, and optimizing the color rendering index.

Compared with background technology, the present invention has the following advantages:

1. High color rendering index, reaching 95 and above, suitable for applications in fields that require high color rendering index of lighting sources, such as museum lighting and textile printing and dyeing lighting.

2. The spectrum can be continuously adjusted on the blackbody radiation locus from 2000K to 9000K, and the brightness can be continuously adjusted at each color temperature.

3. The lamp can be installed in a variety of ways, so it can be used in different lighting environments.

Description of drawings

Figure 1 is a schematic diagram of the arrangement of a single LED module.

Fig. 2 is a schematic diagram of a control circuit and a driving circuit module in an LED lamp.

FIG. 3 is a schematic diagram of the arrangement of a 2×2 LED module array.

detailed description

The technical scheme and working principle of the present invention will now be described in detail in conjunction with the drawings and embodiments.

An LED lamp that simulates sunlight with a high color rendering index, comprising a housing, a diffuser plate, an array of LED modules, a control circuit module (7), a drive circuit module (8) and a power supply module, the diffuser plate, the LED module The array, the control circuit module (7) and the drive circuit module (8) are arranged in the casing, and the LED module array is controlled and driven by the control circuit module (7) and the drive circuit module (8), and it is characterized in that Each group of LED modules described above includes at least 4 kinds of LED light-emitting chips of different colors. By adjusting the brightness of the LED light-emitting chips of different colors, the output light can be continuously adjusted from 2000K to 9000K after being mixed by a diffuser plate, and its color rendering index Ra is greater than 95.

The LED module includes a red LED light emitting chip (1), a green LED light emitting chip (2), a blue LED light emitting chip (3), a yellow LED light emitting chip (4), an orange LED light emitting chip (5) and a white LED light-emitting chip (6).

The LED module array is at least one group, and the maximum power of a single module in the LED module array is 48W; The radiation emitted by an object emits the largest amount of radiation at a specific temperature and at a specific wavelength. Such as incandescent lamps in daily life, the power of each module is 15-27W.

The LED module array is one group, four groups or eight groups; the more the modules are, the larger the luminous area is; the more the modules are combined, the larger the light source is. A luminaire composed of one set of LED modules can be applied to camera module lens correction due to its high uniformity of illumination; a luminaire composed of four sets of LED modules has a larger lighting range and is easy to install, and can be applied to general functional lighting; Eight A lamp composed of a group of LED modules can be used to make a light box. The array of LED modules is one group, so that the uniformity of the light-emitting surface of the lamp is higher, or the array of LED modules is eight groups, thereby increasing the light-emitting area of the lamp, and the LED modules range from one LED module to The light-emitting area of the eight LED modules gradually increases.

The LED module array is four groups, arranged in a 2×2 matrix, and the colors of the LED light-emitting chips in each module are: two are different red LED light-emitting chips (1), and two are different Green LED chip (2), three different blue LED chips (3), one yellow LED chip (4), one orange LED chip (5), and two different white LED chips LED light-emitting chips (6), four groups of LED modules are arranged symmetrically in the lamp shell; each LED light-emitting chip is in a specific position according to the light distribution requirements, and each module can be reused for multiple times according to the light distribution requirements. The same kind of LED light-emitting chip.

The LED module array can be arranged in any form, and if there is a requirement for the uniformity of light emission of the lamps, it is recommended to use a symmetrical distribution.

According to the actual situation, LED light-emitting chips can be added or the light-emitting chips in the LED module can be replaced.

The brightness of each LED light-emitting chip in the module array can be adjusted, thereby adjusting the brightness and color temperature of the LED lamp, and optimizing the color rendering index.

The brightness of each LED light-emitting chip can be controlled through the serial port of the control board, so as to obtain continuously adjustable high color rendering index LED lighting fixtures within the color temperature range of 2000K to 9000K.

The circles and squares directly below the numbers in Figure 1 represent lamp beads, and the combined squares next to them represent resistors; the circles and boxes below the numbers indicate that the lamp beads are packaged in different ways and have different shapes. In order to visually represent various lamp beads, So there are squares and circles; the resistors next to it are adjustable resistors according to specific circuit requirements, and there are no special technical requirements.

Claims (4)

1., with a LED lamp for high color rendering index (CRI) solar simulated, comprise shell, scatter plate, LED module array, control circuit module (7), drive circuit module (8) and power module, described scatter plate, LED module array, control circuit module (7) and drive circuit module (8) are located in shell, and described LED module array is by control circuit module (7), drive circuit module (8) controls and drives, and it is characterized in that LED module comprises red-light LED luminescence chip (1), green LED chip (2), blue-ray LED luminescence chip (3), sodium yellow LED luminescence chip (4), orange-colored light LED luminescence chip (5) and white light LEDs luminescence chip (6), described LED module array is four groups, is arranged in the matrix of 2 × 2, and the LED luminescence chip color in each module is: two kinds is different red-light LED luminescence chips (1), two kinds is different green LED chips (2), three kinds is different blue-ray LED luminescence chips (3), a kind of sodium yellow LED luminescence chip (4), one is orange-colored light LED chip (5), and two kinds is different white light LEDs luminescence chips (6), and four groups of LED modules are arranged in lamp outer casing in a symmetrical manner, each LED luminescence chip is in specific position according to light distribution requirements, and can use many LED luminescence chips of the same race according to light distribution requirements in each module, can realize the brightness of often kind of LED luminescence chip in module array adjustable, thus regulate brightness and the colour temperature of this LED lamp, and optimize colour rendering index, the continuously adjustable emergent light of exportable 2000K to 9000K after scatter plate mixed light, and its colour rendering index Ra is all greater than 95.

2. according to claim 1 a kind of with the LED lamp of high color rendering index (CRI) solar simulated, it is characterized in that described LED module array is at least one group, the single module peak power of described LED module array is 48W; When the target optical spectrum of luminous intensity distribution is black body radiation working flare, the power of each module is 15-27W.

3. according to claim 1 a kind of with the LED lamp of high color rendering index (CRI) solar simulated, it is characterized in that described LED module array is arranged by arbitrary form, the symmetrical uniformity of luminance contributing to raising light fixture.

4. according to claim 1ly a kind ofly to it is characterized in that with the LED lamp of high color rendering index (CRI) solar simulated, can increase according to actual conditions or replace the LED luminescence chip in LED module.