WO2014146536A1 - Light emitting device and related projection system - Google Patents

Abstract

A light emitting device and a related projection system. The light emitting device comprises an LED unit module array having multiple LED unit modules, and each LED unit module comprises an LED chip group with the identical LED chips; a positive connecting piece and a negative connecting piece of each LED chip in the LED chip group are respectively arranged on two opposite sides of a substrate, and the sequence in the positive-negative connecting piece group on the substrate of each LED unit module is the same; presenting each line for cascading LEDs of the same color in each LED unit module in a straight line, and making the lines for cascading LEDs of different colors parallel with each other, so that the lines for cascading all LED unit modules in the LED unit module array form a bunch of lines, and the number of points of intersection within the bunch of lines is not greater than 3, wherein the LED chips of any color except white are distributed in the roughly same manner at different positions of the LED unit modules. The light emitting device can produce light spots of uniform colors.

Description

Light-emitting device and related projection system Technical field

 The present invention relates to the field of illumination and display technology, and in particular to a light-emitting device and related projection system.

Background technique

Conventional high-power lighting devices and light-illuminating devices generally use a gold halide discharge bulb as a light source. Since the gold halide discharge bubble is a white light source, when color light needs to be obtained, a filter is required before the metal halide discharge bubble to realize light output of different colors. The drawback of this kind of light source is that the metal halide discharge bubble has a low service life, ranging from several hundred hours to several thousand hours; the filter makes the projected color light have low saturation, is not bright, and the color of the obtained light is not rich.

 High power LED Due to its advantages of safety, pollution-free and high service life, it has gradually become the first choice for development and application in the field of lighting, with a service life of up to 100,000 hours. Currently, high power LEDs will be As a stage lighting source has become possible, it has the advantages of long life, safe and pollution-free, high color saturation. However, currently a single LED The luminous flux of the chip is limited. In order to obtain high-intensity color light output, LED chips of different colors are usually arranged in an array to realize high-intensity light output. In the existing LED lighting device lighting source, in order to utilize red ( R), green (G), blue (B), white (W) four-color LED chips get a uniform mixed light output, usually R, G, B, W four-color LED The chips are periodically alternately arranged in an array, as shown in Figure 1A. Figure 1B is an optical path diagram corresponding to the periodic unit of any RGBW four-color LED chip in Figure 1A, where 11R is a red LED Chip, 11G is green LED chip, 11B is blue LED chip, 11W is white LED chip, 12 is silica gel ball used in LED chip package, 13 It is a total internal reflection (TIR) lens, 15 is a condenser lens, 16 is a pattern disk, and the clear aperture 161 on it constitutes the aperture of the system, 17 is a projection lens for the aperture 161 The projection is imaged to a distance. Each TIR lens corresponds to an LED chip for shaping and collimating the light beam emitted by the LED chip. LEDs from different colors The beams of different colors emitted by the chip are shaped by the respective TIR lenses, and the uniform outgoing light is emitted from the TIR lens and incident on the front surface of the collecting lens 15. The incident beam is further condensed by the condensing lens 15 Converging onto the pattern disk 16 and being intercepted by the aperture 161, a uniform spot of a specific shape having the same shape as the pupil is obtained. This uniform spot is finally projected onto the stage by the subsequent projection lens 17.

 However, such an LED lighting device has the following problems: on a specific plane (projection lens 17) Uniform illumination is obtained on the imaging plane, but significant color unevenness occurs in the front and rear planes of the plane. This problem has caused user confusion in practical applications, but has not been solved so far.

technical problem

 The technical problem to be solved by the present invention is to provide a light-emitting device capable of forming a spot of uniform color.

 Embodiments of the present invention provide a light emitting device including an LED unit module array, and the LED unit module array includes a plurality of An LED unit module, wherein each LED unit module comprises a substrate, and an LED chip set formed by at least two color LED chips, wherein the LED chip set is disposed on the substrate, each The LED chips included in the LED chip set are all identical; the LED unit module array includes at least one LED unit module;

 The positive electrode tabs of each of the LED chips in the LED chip set are arranged side by side on the first side of the substrate to form a positive electrode connector group, each The negative electrode connectors of the LED chip are arranged side by side on the second side opposite to the first side to form a negative electrode connector group, and the arrangement order in the positive and negative electrode connector groups on the substrate of each LED unit module All the same;

 The lines connecting the LEDs of the same color in each LED unit module are in a line and will have different color LEDs. The series connected lines are parallel to each other such that the lines connecting all the LED unit modules in the LED unit module array are in a bundle line, and the number of intersections of the line lines with itself is not more than 3;

 Among them, any other color LED chip other than white is in the LED Each of the locations in the unit module has a substantially identical distribution such that the mixed spot formed by the array of LED unit modules on a predetermined plane has good uniformity.

 Preferably, the number of types of LED unit modules included in the LED unit module array is equal to each LED The number of LED chips included in the unit module.

 Preferably, at least 80% of the LED unit modules in the LED unit module array are located at the center of the LED unit module The position of each LED unit module in the unit module array has another LED unit module whose position is symmetric with respect to the center;

 And in any two mutually symmetric LED unit modules, each color LED chip is located at the two LEDs The position in the unit module is also symmetrical about the center.

 Preferably, the LED unit module array comprises at least two columns of LEDs The unit modules are arranged in parallel in parallel to form an array of circular or regular polygons, wherein the positive electrode connector groups of the LED unit modules in the same column are directed in the direction of the negative electrode connector group, and the LEDs of any two adjacent columns are aligned. The anode module group of the unit module is directed in the opposite direction to its negative connector group.

 Preferably, the LED unit module array includes only one LED unit module, and each of the LED unit modules The arrangement of the LED chips is rotationally symmetric about its center;

 The direction of the line connecting all the LED unit modules in series includes at least two directions, so that the LEDs on different running lines The rotation angles of the unit modules are different so that the LED chips of any one color have substantially the same distribution at each position in the LED unit module.

 Preferably, in the array of LED unit modules, the direction of the line includes m directions, wherein the m is the LED The number of LED chips included in the chipset, m is 2, 3 or 4;

 The rotation angle of the LED unit module in each direction is a multiple of 360/m.

 Preferably, the array of LED unit modules has a rectangular array, wherein each LED unit module comprises four LEDs Chip

 In the first partial column, the LED on each row The positive electrode connector group of the unit module points in the direction of the negative electrode connector group and is perpendicular to the direction of the column, and the positive electrode connector group of the LED unit module on any two adjacent rows points to the negative electrode connector group thereof. In the opposite direction;

 LEDs on each column in the remaining columns The positive electrode connector group of the unit module points in the direction of the negative electrode connector group and is parallel to the direction of the column, and the positive electrode connector group of the LED unit module in any two adjacent columns points to the negative electrode connector group thereof. The opposite direction.

 Preferably, the LED The unit module array is composed of at least two concentrically arranged rings, wherein on each ring, in a counterclockwise direction, the rotation angle of each LED unit module is an arithmetic progression, wherein the tolerances of the difference series are Absolute value 360/n degrees, where n is the number of LED unit modules on the ring.

 Preferably, the LED unit module array comprises two different LED unit modules, wherein each LED The unit module includes four LED chips that are rotationally symmetric about the center;

 Each of the LED unit modules is located in the opposite two line directions.

 Embodiments of the present invention also provide a projection system including the above-described light emitting device.

 Compared with the prior art, the present invention includes the following beneficial effects:

 In the present invention, LED chips of any color other than white in the LED unit module array are in the LED Each of the positions in the unit module has substantially the same distribution, and the mixed light spot formed on the predetermined plane of the LED unit module array has good uniformity.

DRAWINGS

 1A is a schematic structural view of an LED array in a light-emitting device in the prior art;

 Figure 1B is an optical path diagram corresponding to the periodic unit of any RGBW four-color LED chip in Figure 1A.

 2A is a schematic structural view of an embodiment of a light emitting device of the present invention;

 2B is a schematic view showing the arrangement of the LED unit module array in the light-emitting device shown in FIG. 2A;

 2C is a schematic structural view of an LED unit module in the LED unit module array shown in FIG. 2B;

 2D is a schematic diagram of a wiring of the LED unit module array shown in FIG. 2B;

 2E is a schematic view showing another arrangement of the LED unit module array in the light-emitting device of the present invention;

 3 is a schematic view showing another arrangement of an array of LED unit modules in the light-emitting device of the present invention;

 4 is a schematic view showing another arrangement of an LED unit module array in the light-emitting device of the present invention;

 5 is a schematic view showing another arrangement of an LED unit module array in the light-emitting device of the present invention;

 Fig. 6 is a schematic view showing another arrangement of the LED unit module array in the light-emitting device of the present invention.

Embodiments of the invention

 The inventors have made targeted research on the problems in the background art. The inventor found that in the schemes shown in Figures 1a and 1b, R, G, B, W four-color LED chips have different spatial positions, and the beams of different colors emitted by them are shaped by their respective TIR lenses, and the outgoing beams do not coincide with each other, that is, from TIR. The spatial positions of the beams of different colors in the beam emitted by the lens are different. Take the four-color LED chip arranged in R, G, B, and W in Figure 1a as an example. The output light passes through the TIR lens. After shaping, the spatial color distribution of R, G, B, W in order will be formed, as shown in Figure 1b, where 14R represents the red LED 11R and 14G represents green. The light beam generated by LED11G, 14B represents the light beam generated by blue LED11B, and 14W represents the light beam generated by white LED11W. This spatially unevenly distributed beam of light passes through a converging lens 15 After convergence, although the uniform beam can be formed at the pupil 161, the incident angles of the beams of different colors are different, and the difference of the incident angles will cause them to go from the pupil 161. The exit angle is different when exiting. The difference in spatial angular distribution of the different color beams will be transmitted to the beam 18 output from the projection lens 17, wherein 18W represents the output white light beam, 18B Indicates the output blue light beam, 18G represents the output green light beam, and 18R represents the output red light beam.

 Essentially, the projection lens 17 is opposite to the aperture 161 Projection imaging is performed, and in the image plane, although a spot with uniform color and brightness can be obtained, at other positions deviating from the image plane, spots of different colors will be staggered in space to form a light distribution with uneven color distribution. It is due to the difference in the spatial angle distribution of the beams of different colors among the beams output from the system.

 In short, in the existing system using R, G, B, W four-color LED as the illumination source, due to each LED The chip must be equipped with a TIR lens to make LEDs of different colors The chips are spaced apart in a spatial position by a certain distance. The spatial position of the chips is different, so that the spatial angular distributions of the different color beams in the output beam are different, which causes the problem of the spot color unevenness of the projected beam at a position deviating from the image plane.

For convenience of description, the following uses 'up', 'down', 'left' and 'right' to indicate the positional relationship between the components, and the 'up' and 'down' 'left' and 'right' are respectively in the figure, Down, left, right.

 The embodiments of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

 Embodiment 1

 Referring to FIG. 2A, FIG. 2B and FIG. 2C, FIG. 2A is a schematic structural view of an embodiment of a light-emitting device according to the present invention. 2B is a schematic diagram of the arrangement of the LED unit module array in the light-emitting device shown in FIG. 2A. The light emitting device includes an LED unit module array 1, a collimating lens array 3, and a collecting lens 5.

 Each collimating lens 31 in the collimating lens array 3 is aligned with one of the LED unit modules in the LED unit module array 1 11 , used to collimate the light beam emitted by the LED unit module 11 . The condensing lens 5 is located at the rear end of the optical path of the collimator lens array 3 for concentrating the light emitted from the collimator lens array 3 on a predetermined surface 7 on. Among them, the predetermined surface 7 is often the focal plane of the collecting lens 5.

 At least two color LED chips form an LED chip set 111 which is fixed to a substrate (not shown) to form a The LED unit module 11 and the plurality of LED unit modules form an array of LED unit modules. Wherein, the LEDs included in the LED chipset 111 of each LED unit module 11 The chips are identical, that is, the number of LED chips, the type of color, and the number of LEDs of each color are the same in each LED chipset. The substrate is preferably thermally conductive to the LED chipset 111 Cool down. The substrate may be made of a thermally conductive ceramic such as alumina or aluminum nitride as long as it has a sufficiently high thermal conductivity and an insulating surface layer.

 LED unit module array 1 preferably consists of at least two columns of LED unit modules 11 Arranged in parallel in a circular or regular polygonal array to match the circular lens placed on the subsequent optical path of the LED unit module array to improve light utilization. Of course, when it is not considered to fit a circular lens, The LED unit module array 1 may not be circular or a regular polygon. In this embodiment, the LED unit module array 1 is composed of five columns of LED unit modules. Arranged in parallel into a regular hexagonal array.

 In this embodiment, each LED chipset 111 includes four different colors of LEDs of R, G, W, and B. Chip. The four LED chips and the spacing between the chips together form the light source area of the entire LED unit module. Four LEDs The chips are closely arranged in a matrix shape. At this time, the area of the light source is the smallest and a symmetrical structure is formed, and the spatial uniformity of the outgoing beam is best after the collimating lens 31 is collimated. More preferably, these four LEDs The pads on the surface of the chip are located on the outside of the field, which is good for gold wire. Of course, in practical applications, the field type is only a possible arrangement, and other arrangements are possible; and if the number of LED chips is not 4 The pieces will inevitably be arranged in other forms.

 The purpose of closely aligning the LED chips with each other is to reduce the optical expansion of the light source system on the one hand, and to make the LEDs on the other hand. The gap between the chips is as small as possible, which is beneficial to the uniformity of the light spot of the light source system. In practice, due to the limitations of the LED packaging process, the spacing of the LED chips often cannot be 0. , but a small distance such as 0.1~0.2mm (for 1mm LED chips).

 The LED unit module array 1 includes four different LED chipsets 111. Due to the inclusion of each LED chipset The LED chips are identical, so the different LED chipsets refer to the LED chips in each LED chipset in the LED unit module 11 The location is different. Specifically, in this embodiment, the four LED unit modules are clockwise from the upper left corner, and the LED chip sets in the LED unit module A are: G, B, W, R; The LED chipset in the LED unit module B is: R, G, B, W; The LED chipset in the LED unit module C is: W, R, G, B; The LED chipset in the LED unit module D is: B, W, R, G.

 Moreover, in the LED unit module array 1, the number of the four LED unit modules is substantially the same, so that each color The LED chips have approximately the same distribution at various locations in the LED unit module. In particular, in Figure 2B, the number of times the red LED appears in the upper left corner is 5 The number of occurrences in the lower left corner is 5 , the number of occurrences in the upper right corner is 4 , and the number of occurrences in the lower right corner is 5 . The blue LED chip (labeled B in the figure) and the green LED chip (identified in the figure) G) and the white LED chip (identified as W in the figure) also satisfy this condition.

 In the LED lighting device of the present embodiment, the collimator lens 31 is in the pair of LED unit modules 11 The exit beam is collimated and at least two colors of light emitted by the LED unit module are mixed. For each LED unit module, LEDs of four colors R, G, B, W The chip faces the same collimating lens, and they output R, G, B, W After the four color beams are collimated and mixed by the collimating lens, a uniform color uniform parallel light is synthesized (although it is not ideal parallel light, but has a certain divergence angle, but its divergence angle is small, For example ± 9 °, so it can be treated as approximately parallel light). The beams of different colors in the parallel beam overlap each other in space, and their corresponding angular distributions are also approximately the same, and then passed through the collecting lens 5 Converging to the pupil (not shown), the projection lens (not shown) images the image of the pupil to a distant location. During the propagation of the entire beam, R, G, B, W The beams of the four colors are always coupled together, so in the final output of the light source system, the spatial position and the exit angle of the beams of different colors will be substantially the same.

 But essentially, even the R, G, B, W four-color LEDs The chips are closely arranged in a field shape, and since their spatial positions are still different, such spatial positions will cause the different colored beams they emit to pass through the collimating lens. The angular distribution of the space after collimation will also vary slightly. Thus, unevenness may occur when the light beams emitted from each of the collimator lenses 31 are concentrated by the converging lens 5 onto the focal plane. Therefore, in this embodiment, the LED The unit module array 1 includes four LED unit modules such that the LED chips of each color have substantially the same distribution at various positions in the LED unit module, so that the beams of each color pass through the collimating lens. 31 The spatial angular distribution after collimation is nearly uniform, which makes the projection spot of the beams of different colors not only in the image plane, but also ideally overlaps at other positions away from the image surface, thereby obtaining a spot with uniform color and brightness. .

 Preferably, a fly-eye lens pair 4 is disposed on the optical path between the collimating lens array 3 and the converging lens 5 for aligning the straight lens array 3 The emitted light is homogenized to improve the uniformity of the spatial distribution of the beams of different colors. In order to achieve a good light-shaping effect, it is preferable to ensure that the size of each of the collimating lenses in the collimator lens array 3 is a fly-eye lens pair. The size of each microlens of the mid-lens lens is more than 4 times. Obviously, the smaller the size of each microlens in the fly-eye lens, the better the uniformity effect. By providing a fly-eye lens pair behind the collimator lens array 3 At this time, the entire light source system is equivalent to superimposing imaging of each microlens in the fly-eye lens. Preferably, each of the microlenses in the fly-eye lens has a regular hexagonal structure, on the one hand, ensuring a seamless arrangement between adjacent microlenses, and on the other hand, matching the projected image with the circular projection spot.

 Preferably, each color of the LED chip is in the LED Each position in the unit module has the same distribution. However, in practice, limited by some conditions, a certain color of LED chip in each LED The number of positions of the unit module is not exactly equal; but because the difference is not large, the unevenness of the spot by the human eye is not obvious, so each LED The superposition of the projected spot of the unit module will still have good uniformity.

 Due to white to LED The uniformity of the mixed spot formed by the unit module array on the predetermined plane is less affected, so in some occasions where the uniformity requirement is not very high, the LED chips of the respective colors are arranged in the LED. When the positions of the respective positions in the unit module are distributed, it is only necessary to make the LED chips of any color other than white have substantially the same distribution at each position in the LED unit module.

 Since LEDs require constant current drive, the LEDs must be placed in series. And for different colors of LED The current needs to be controlled separately, so LEDs of different colors need to be connected in series. In the embodiment described above, in order to make the LED chip of any color in the LED Each position in the unit module has substantially the same distribution, and the LED unit modules rotate at different angles at different positions, which makes the LEDs in the LED unit module array The wiring between the chips is complicated, and the intersections between the wirings are prone to occur. In view of this, the present invention provides a solution to the problem of complicated wiring, which will be specifically described below.

 Please refer to FIG. 2C and FIG. 2D. FIG. 2C is an LED in the LED unit module array shown in FIG. 2B. FIG. 2D is a schematic diagram of a wiring of the LED unit module array shown in FIG. 2B.

 The positive electrode tabs of each LED chip in the LED unit module are arranged side by side on the first side of the substrate to form a positive electrode connector group, each of which The negative electrode connectors of the LED chip are arranged side by side on the second side opposite to the first side to form a negative electrode connector group

 Specifically, as shown in FIG. 2C, the LED chip set in the LED unit module shown in the upper left corner of FIG. 2C 1 Including four LED chips of R, G, B, and W, the four LED chips are closely arranged in a matrix shape on the substrate 2 On the central area, the positive electrode tabs of the four chips are arranged side by side in the first side 2a of the heat conductive substrate 2 in one of the arrangement order (R+, G+, B+, W+) The negative electrodes of the four chips are arranged side by side on the second side 2b of the thermally conductive substrate 2 in a corresponding arrangement order (R-, G-, B-, W-).

 Of course, in practical applications, the positive electrode tabs and the negative electrode tabs of the four chips may also be arranged side by side on the heat conductive substrate in other order, for example ( R+ , B+ , G+ , W+ ) and ( R- , B- , G- , W- ), or ( G+ , B+ , R+ , W+ ) and ( G- , B- , R-, W-) and so on.

 For convenience of description, when an LED unit module described below rotates X degrees, it refers to the LED. The unit module is obtained by rotating the X-degree clockwise by the position where the positive electrode connector group is placed at the upper and the negative electrode assembly group. Specifically, for example, the LED shown in the upper left corner of Figure 1. The position of the unit module is the starting point, the LED unit module shown in the upper right corner is placed at a position rotated by 90 degrees, and the LED unit module shown in the lower left corner is rotated 180. In the position of the degree, the LED unit module shown in the lower right corner is placed at a position of 270 degrees.

 In this embodiment, the positive and negative electrode sets on the substrate of each LED unit module are completely identical.

 For the sake of clarity, the different LED unit modules described below mean that LEDs cannot be rotated by rotating the LED unit modules. The unit modules are identical. The direction of the line described below refers to the direction in which the positive terminal group of the LED unit module through which the line passes is directed to the negative connector group.

 In this embodiment, the number of types of the LED unit modules 11 included in the LED unit module array 1 is equal to each LED. The number of LED chips included in the unit module 11. Since the positive and negative connector groups of each LED unit module 11 and the included LED chips are identical, the different types of LEDs The LED module of the LED unit module in the unit module has different positions relative to the positive and negative connectors.

 Specifically, in this embodiment, each LED unit module 11 includes R, G, W, and B. Four different color LED chips. Therefore, the LED unit module array 1 includes four different LED unit modules. Rotate in the LED unit module 0 In degrees, starting from the upper left corner clockwise, the LED chipset in the LED unit module A is: G, B, W, R; LED in the LED unit module B The chipset is: R, G, B, W; the LED chipset in the LED unit module C is: W, R, G, B; LED in the LED unit module D The chipset is: B, W, R, G.

 LED unit module in the same column in the LED unit module array 1 The positive electrode connector groups are oriented in the same direction as their negative electrode groups so as to be able to be routed in series along the LED unit modules 11 on the same column. And any two adjacent columns of LED unit modules 11 The positive electrode connector group is oriented in the opposite direction to its negative electrode connector group to enable the two columns of LED unit modules to be connected in series at the end of the same side of the adjacent two columns.

 Specifically, with a red LED (shown as R in the figure), the red LEDs on the first, third, and fifth columns are counted from the left. The anode contacts are directed downwardly in the direction of their negative connectors, and the positive terminals of the red LEDs in the second and fourth columns are directed upwards in the direction of their negative connectors. In this way, all red LEDs will be When connected in series, the lines in the first, third and fifth columns are connected in turn in the downward direction to the positive and negative connectors of each red LED, and the lines in the second and fourth columns are all in the upward direction. Will each red LED The positive and negative contacts are connected, and the red LEDs of the first and second columns pass through the red LEDs in the LED unit module 151 on the lower end of the first column. The negative electrode connector and the red LED positive terminal of the LED unit module 153 on the lower end of the second column are connected. Any other adjacent two columns are also connected in series by this method.

 The other three color LEDs are wired in the same way as the red LEDs. As each LED The arrangement order of the positive and negative connector groups in the unit module is the same, and the positive electrode assembly groups of the adjacent two columns of LED unit modules are opposite to the negative electrode assembly group, so that the adjacent two columns of the pole piece group Symmetrical left and right, so the four colors The lines connected in series of LEDs are adjacent to each other and form a bundle of lines parallel to each other, and the line has no intersection with itself, which makes the wiring simple and convenient.

 After the LED unit module array and its wiring are determined, the LED unit modules A, B, C, D These four modules can be placed anywhere in the array of LED unit modules. Just make sure that each color LED chip is in the LED The four positions of the upper left corner, the lower left corner, the upper right corner and the lower right corner of the unit module have the same or similar distribution, so that the mixed light spot formed by the LED unit module array on the predetermined plane has good uniformity.

 In order to further improve the uniformity of the mixed spot formed on the predetermined surface 7 of the light-emitting device, preferably, the LED In the unit module array, in addition to the LED unit module located in the center, at least 80% of the LED unit module arrays have another LED in each LED unit module position. The position of the unit module is symmetrical with respect to its center. And in any two mutually symmetric LED unit modules, each color LED chip is located at the two LEDs The position in the unit module is also symmetrical about the center.

 Specifically, in Figure 2D, the LED unit module A is set to the LED. The center of the unit module array. Of course, in practical applications, other types of LED unit modules can also be placed in the center. Except for the LED unit module A located in the center, any other LED The unit module can find another LED unit module that is symmetric with respect to its center. For example, the first LED unit module A on the left first column and the first LED unit module C on the right first column The arrangement position is symmetrical about the center. Moreover, the position in the two LED unit modules of each color LED chip is also symmetric about the center. In red LED, red in LED unit module A The LED is located in the lower left corner and the red LED is located in the upper right corner of the LED unit module C.

 In order to make the various colors more uniform, it is preferred to at least partially adjacent two LEDs The unit modules are different. For example, in this embodiment, except for the LED unit module A located at the center of the array, any other adjacent two LED unit modules are different types of modules.

 In this embodiment, the lines may not be routed along the LED unit modules located in the same column, but along the LEDs located on the same ring. Unit module wiring. Specifically, as shown in Fig. 2E, Fig. 2E is a schematic view showing another arrangement of the LED unit module array in the light-emitting device of the present invention. Each LED in this embodiment The placement of the chipset in the array is the same as in the array of LED unit modules shown in Figure 2D. The difference is: due to the LED The cell module array can also be decomposed into dots located on two concentric regular hexagons and LEDs located at the center of the two regular hexagons Unit module. Since a line can be used along the same regular hexagonal edge, the points of the two concentric regular hexagons and a point at the center thereof are strung together and there is no intersection, therefore, in this embodiment, Set at each point according to the direction of the line The positive terminal of the LED unit module points in the direction of the negative connector and sets the wiring.

 In practice, the four LED chipsets in the LED unit module array can also be composed of LED chips of other colors and / or consist of other sorting orders, not limited to the above examples. Moreover, instead of four different color LEDs in each LED chipset The chip is composed of four chips, and the four chips have three or two different colors.

 In this embodiment, LED chips of various colors are implemented in LEDs by using different LED unit modules. Each location in the unit module has approximately the same distribution. However, it is also possible to use only one type of LED unit module and achieve this by different wiring directions. The details are as follows.

 Embodiment 2

 Please refer to FIG. 3, which is a schematic diagram of another arrangement of the LED unit module array in the light-emitting device of the present invention. led The unit module array includes a plurality of LED unit modules 33, wherein the LED chips included in each of the LED unit modules 33 are identical, and each LED The positive and negative electrode sets on the substrate of the unit module are completely identical.

 The difference between this embodiment and the first embodiment is:

 In this embodiment, the LED unit module array includes only one LED unit module 33, and each LED in the LED chip group The arrangement of the chips is rotationally symmetric about its center so that the position of the LED chipset after the LED unit module 33 is rotated by a predetermined angle can still coincide with the position of the LED chipset at 0 degrees.

 In this embodiment, each LED unit module is specifically an LED unit module as shown in the upper left corner of FIG. 2C. led The unit module array is a 4*4 rectangular array, counting from left to right and counting from top to bottom, where each LED in the first column The positive electrode connector group of the unit module is directed downward in the direction of its negative connector group; in the middle two columns, each LED on the second and fourth rows The positive electrode connector group of the unit module is directed to the right side of the negative electrode assembly group, and the positive electrode connector group of each LED unit module on the first row and the third row is directed to the direction of the negative electrode connector group. Left; each LED in the fourth column The positive electrode assembly of the unit module is directed upwards in the direction of its negative connector group.

 In this way, when the LEDs of different colors in the LED unit module array are connected in series, the red LED (represented as R in the figure) For example, the line in the first column is routed along the direction in which the red LED positive connector points to the negative terminal, that is, in the downward direction. Then along the fourth, third, second, and first rows of red LEDs in the middle two columns The positive electrode connector is directed to the right, left, right, and left wirings in the direction of the negative electrode. Then, the line is on the first row of the second column of LEDs The upper direction of the unit module is turned right to the empty area on the right side of the fourth column, and the empty area on the right side of the fourth column is turned down to the lowermost LED unit module 332 on the fourth column and connected to the LED unit. Module red The positive pole connector of the LED is then routed in the direction of the negative pole connector along the red LED anode connector in the fourth column, that is, in the upward direction. The last LED unit module connected to the line 331 That is, the negative terminal of the LED unit module 331 on the first row of the fourth column is connected to the negative pole of the power supply.

 Although this will create a line intersection, but the intersection is on a blank area next to the LED unit module array, not in the LED Between the unit modules, there is no shortage of space due to the need to maintain a safe distance between the lines.

 The other three color LEDs are wired in the same way as the red LEDs. As each LED The order of the positive and negative connector groups in the unit module is the same, and the lines of the four color LEDs are adjacent and parallel to each other, so all the LEDs in the LED unit module array The lines in which the unit modules are connected form a bundle of wires, and the bundle has only one intersection with itself, which makes the wiring simple and convenient.

 In the embodiment, although the LED unit module includes only one sort of LED The chipset, but the direction of the line includes four directions (bottom, right, left, and top), causing the LED unit modules to rotate at different angles in different line directions. Specifically, LED The unit module has a rotation angle of zero in the direction of the downward line, a rotation angle of 90 degrees in the direction of the left line, a rotation angle of 180 degrees in the upward line direction, and an angle of rotation in the direction of the right line. 270 Degree; in turn, each color LED chip in the LED chipset has the same distribution at each position in each LED unit module (each color LED chip appears in each position 4 times) ), so that the mixed light spot formed by the light-emitting device on a predetermined plane has good uniformity.

 It is easy to understand that when there are only four chips in each LED chipset in the LED unit module, and four chips have three colors in total (such as RGRB), since the LED chip of each color has substantially the same distribution in each position in the LED unit module by the rotation of the LED unit module, the LED is In the array of unit modules, it is still necessary to include lines in the four directions of up, down, left, and right.

 However, when the LED unit module includes only three chips per LED chipset, and the three chips have three colors (such as RGB) ) or two colors (such as RGR), and the three chips are arranged symmetrically about the center, the line direction only needs to include three directions, that is, the equilateral triangle is clockwise / The direction indicated by the three sides of the counterclockwise direction, and the number of each direction is equal or similar, so that each color LED chip in the LED chipset is in each LED Each location in the unit module has the same distribution.

 Similarly, if each LED chipset in an LED unit module includes only two LED chips of different colors, for example each The LED chipset consists of only two LED chips of different colors or four different color LED chips (each color LED) Two chips), the line direction only needs to include two opposite directions. Of course, there are four different color LEDs in each LED chipset. In the case of a chip, the direction of the line can also include four different directions.

 It is easy to understand that the order of the line directions in this embodiment ( Below, right, left, right, left, and top) are just one example, and the ordering is not limited. Since the LED unit module in this embodiment includes four LED chips, and the four LEDs The chip is arranged in a field shape, so as long as the line includes the direction in which the LED unit modules are rotated by four degrees of 0 degrees, 90 degrees, 180 degrees, and 270 degrees, and the LEDs of each angle are rotated. The same number of unit modules allows each color LED chip to have the same distribution at each location in each LED unit module.

 For example, in the first partial column, the LED on each row The positive electrode connector group of the unit module is directed to the direction of the negative electrode connector group and is perpendicular to the direction of the column, and the LEDs on any two adjacent rows The anode module group of the unit module is directed in the opposite direction to its negative connector group. LEDs on each column in the remaining columns The positive electrode connector group of the unit module points in the direction of the negative electrode connector group and is parallel to the direction of the column, and the positive electrode connector group of the LED unit module in any two adjacent columns points to the negative electrode connector group thereof. The opposite direction.

 Specifically, as shown in FIG. 4, FIG. 4 is an LED unit module array in the light-emitting device of the present invention. Another arrangement diagram. The difference between this embodiment and the arrangement diagram shown in FIG. 3 is:

 In the LED unit module array, each LED in the first and second columns is counted from the left and counted from the top The direction of the positive electrode connector group of the unit module pointing to the negative electrode connector group is perpendicular to the direction of the two columns (up/down), wherein each LED in the first row and the third row in the first and second columns The positive electrode connector group of the unit module is directed to the left of the negative electrode connector group, and the positive electrode connector of each LED unit module on the second row and the fourth row is directed to the right side of the negative electrode connector. Each LED on the third and fourth columns The positive module group of the unit module points to the fangi of its negative connector group, which is parallel to the two columns (up/down), and each LED in the third column The positive electrode connector group of the unit module points downward in the direction of the negative electrode connector group, and the positive electrode connector group of each LED unit module in the fourth column points in the direction of the negative electrode connector group.

 In this way, when the LEDs of different colors in the LED unit module array are connected in series, the red LED (represented as R in the figure) For example, the lines in the first and second columns follow the red LEDs in the fourth row, the third row, the second row, and the first row. The positive electrode connector is directed to the right, left, right, and left wires in the direction of the negative electrode. Then, the line goes from the negative side of the red LED on the first line of the first column to the red area on the first line of the third column through the blank area on the first line On the positive terminal of the LED, and route it along the direction of the red LED positive connector in the third column pointing to the negative connector, and then turn to the fourth column from the negative terminal of the red LED on the fourth row of the third column. Red on the fourth line On the positive terminal of the LED, route it upwards in the direction of the red LED positive connector in the fourth column pointing to the negative connector.

 Compared to Figure 3 In the arrangement diagram shown in the figure, the intersection point of the line and itself in the arrangement diagram shown in the embodiment is zero, and there is no need to make a jump bridge during wiring, which is more convenient for processing.

 It should be noted that the LED The number of columns and the number of rows of the unit module array are not limited to the above examples, and may be determined according to actual needs. Just keep the LEDs on the lines in each direction The number of unit modules is equal or close, so that LED chips of any color can have approximately the same or the same distribution at each position in the LED unit module.

 In Figures 3 and 4 In the arrangement diagram shown, the lines are routed along the rows and columns in the array. In practice, the line can also be routed around the array. For example, the line first wraps around the LED on the outermost circle of the array. Unit module wiring, and then around the LED on the inside of the array Unit module wiring, as long as the direction of the line can be included in the four directions of up, down, left, and right, and the number of times in each direction is consistent or roughly the same.

 Alternatively, it is also possible to arrange the array of LED unit modules into At least two concentrically arranged rings are formed, wherein on each ring, along the course of the line, the rotation angle of each LED unit module is an arithmetic progression, wherein the absolute value of the tolerance of the difference series is 360/ n degrees, where n is the number of LED unit modules on the ring; this ensures that the LED chips of any color have the same distribution at each position in the LED unit module. The details are as follows.

 Please refer to FIG. 5. FIG. 5 is another schematic diagram of an arrangement of LED unit modules in the light-emitting device of the present invention. led The unit module array includes a plurality of LED unit modules 55, wherein the LED chips included in the LED chipset of each LED unit module 55 are identical, and each LED The positive and negative electrode sets on the substrate of the unit module are completely identical. The LED unit module array includes only one LED unit module 55, and each LED in the LED chip set The arrangement of the chips is rotationally symmetric about its center.

 The difference between this embodiment and the embodiment shown in FIG. 3 is that:

 In this embodiment, the LED unit module array is specifically arranged into two concentric rings C1 and C2, wherein a ring with a smaller radius is arranged. There are 6 LED unit modules on the C2, and 12 LED unit modules on the larger ring C1. In order to increase the utilization rate, there is also an LED on the center of the ring. Unit module.

 On the ring C1 with a larger radius, the first LED unit module 51 has a rotation angle of 90 degrees. From the first one At the beginning of the LED unit module 51, the angle of rotation of each LED unit module is reduced by 30 degrees in the counterclockwise direction of the ring.

 On the ring C2 with a smaller radius, the first LED unit module 52 has a rotation angle of 90 degrees. From the first one Starting with the LED unit module 52, the angle of rotation of each LED unit module is reduced by 60 degrees in the counterclockwise direction of the ring.

 In this embodiment, when wiring, the LED unit module on the center of the circle is connected in series to the ring C2 having a smaller radius, and two adjacent ones thereof Between LED unit modules. The positive pole L1 of the power supply is connected to the positive terminal set of the first LED unit module 51 on the ring C1 with a larger radius, and along the ring C1 The LED unit modules on the ring C1 are connected in series in a counterclockwise direction. The LED unit modules on the ring C2 with a smaller radius are connected in series, and then two of the two rings are closer together. The positive electrode connector group and the negative electrode connector group of the LED unit module are connected to connect all the LED unit modules on the two rings in series. The negative pole of the power supply L2 is connected to the last LED unit module on the line. Connect the LED unit module array to the circuit on the negative connector group of 57.

 In this embodiment, the LED unit modules on each of the rings are rotated at different angles, and the different rotation angles are in the range of 0-360. The distribution within the range of ° is uniform, ensuring that the LED chips of each color have approximately the same distribution at each position in each LED unit module. At the same time, due to the wiring of any adjacent two LEDs on each ring The positive and negative connector groups of the unit module are adjacent to each other, which makes the wiring simple and convenient, and the formed circuit has fewer intersections.

 Of course, in practical applications, the LEDs on the two rings can also be used. The wirings connected in series with the unit modules are sequentially routed along a ring having a larger radius, and then the wires are then routed to the ring having a smaller radius, and then sequentially routed to the LED unit module located at the center of the circle, and the center of the circle LED on The negative electrode assembly of the unit module is then connected to the negative pole of the power supply.

 As can be seen from the arrangement diagram of the LED unit module array shown in Figure 3, Figure 4 and Figure 5, the LED Only one LED unit module can be used in the unit module array, wherein the arrangement of each LED chip in the LED unit module is symmetric about its center, and all LEDs are arranged during wiring. The line of the unit modules connected in series includes at least two directions, and controls the rotation angles of the LED unit modules on the different running lines so that the LED chips of any color are in the LED Each location in the unit module has approximately the same distribution.

 Embodiment 3

 In the first embodiment and the second embodiment, respectively, by using different types of LED unit modules and by using the same LED Unit modules but different wiring directions to achieve any color LED chip in LED Each location in the cell module has a substantially identically distributed simple wiring. However, in practical applications, the two methods can also be combined to achieve the same purpose. The details are as follows.

 Please refer to FIG. 6. FIG. 6 is another schematic diagram of the arrangement of the LED unit modules in the light-emitting device of the present invention. led The unit module array includes a plurality of LED unit modules, wherein the LED chips included in each of the LED unit modules are identical, and each LED The positive and negative electrode sets on the substrate of the unit module are completely identical.

 The difference between this embodiment and the above embodiment is:

 The LED unit module array includes two different LED unit modules, each of which has an LED The unit module includes four LED chips that are rotationally symmetric about the center, and each of the LED unit modules is located in the opposite two line directions.

 More specifically, in this embodiment, the LED unit module includes two LED unit modules. The first type of LED unit module 141 Therefore, when the LED unit module is rotated by 0 degrees, four LED chips of R, G, W, and B are clockwise from the upper left corner; the second LED unit module 142 is: When the LED unit module is rotated by 0 degrees, four LED chips of B, R, G, and W are clockwise from the upper left corner.

 The LED unit module array is a 4*4 rectangular array, counting the LEDs on the first and second columns from the left The unit modules are all the first LED unit modules 141, and the LED unit modules in the third and fourth columns are all the second LED unit modules 142. And the LEDs on the first and third columns The positive electrode connector group of the unit module points downward in the direction of the negative electrode connector group, and the positive electrode connector group of the LED unit module in the second column and the fourth column points in the direction of the negative electrode connector group.

 In this way, when the LEDs of different colors in the LED unit module array are connected in series, the red LED (shown as R) For example, the lines in the first column and the third column sequentially connect the positive and negative terminals of each red LED in the downward direction, and the lines in the second and fourth columns are in the upward direction. Will each red LED The positive electrode connector and the negative electrode connector are connected. The first column and the second column, the third column, and the fourth column all pass through the respective lowermost LEDs. The positive and negative terminals of the unit module are connected to each other, and the second column and the third column are connected by the positive and negative terminals of the uppermost one of the LED unit modules.

 The other three color LEDs are wired in the same way as the red LEDs. As each LED The order of the positive and negative connector groups in the unit module is the same, and the positive electrode groups of the adjacent two columns of LED unit modules are opposite to the negative electrode group, so the four color LEDs The series connected lines are adjacent to each other and form a bundle of lines parallel to each other, and the line has no intersection with itself, which makes the wiring simple and convenient.

 Meanwhile, in this embodiment, by using two LED unit modules and a combination of two line directions, firstly, two columns of the first type of LED are used. The unit module, wherein one column has a rotation angle of 0 and the other column has a rotation angle of 180 degrees, that is, two lines are oriented to obtain a chipset of two positions; at this time, the remaining two positions of the chipset also rotate with each other. 180 Degree relationship, that is, the LED unit modules of the third and fourth columns; thus, each LED unit module has two rotation directions (0 degrees and 180 degrees) to realize four different LEDs. The order in which the chipsets are arranged, so that each color LED chip in the LED chipset has the same distribution at each position in each LED unit module (each color LED) The number of times the chip appears at each position is 4) so that the mixed spot formed by the illuminating device on a predetermined plane has good uniformity.

The various embodiments in the present specification are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same similar parts between the various embodiments may be referred to each other.

 An embodiment of the present invention further provides a The projection system includes a light emitting device that can have the structure and function of the various embodiments described above. The projection system can use various projection technologies, such as liquid crystal displays (LCD, Liquid) Crystal Display ) projection technology, digital optical path processor ( DLP , Digital Light Processor ) Projection technology. Furthermore, the above-described lighting device can also be applied to lighting systems, such as stage lighting.

The above is only the embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the invention and the drawings are directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of the present invention.

Claims (10)

1. A lighting device comprising an array of LED unit modules, characterized in that:

   The LED unit module array includes a plurality of LED unit modules, wherein each LED unit module includes a substrate and LEDs of at least two colors a chip chipset formed by the chip, wherein the LED chip set is disposed on the substrate, and the LED chips included in each LED chip set are identical; the LED unit module array includes at least one LED unit module;

   The positive electrode tabs of each of the LED chips in the LED chip set are arranged side by side on the first side of the substrate to form a positive electrode connector group, and each LED The negative electrode connectors of the chip are arranged side by side on the second side opposite to the first side to form a negative electrode connector group, and the arrangement order of the positive and negative electrode connector groups on the substrate of each LED unit module is same;

   The lines connecting the LEDs of the same color in each LED unit module are in a line and will have different color LEDs. The series connected lines are parallel to each other such that the lines connecting all the LED unit modules in the LED unit module array are in a bundle, and the number of intersections between the bundle and itself is not more than 3 ;

   Wherein any one of the LED chips of other colors other than white has substantially the same distribution at each position in the LED unit module, such that the LED The mixed light spot formed by the unit module array on a predetermined plane has good uniformity.
2. The illuminating device according to claim 1, wherein the number of types of LED unit modules included in the array of LED unit modules is equal to each The number of LED chips included in the LED unit module.
3. The illuminating device according to claim 2, wherein the LED unit module array has at least 80% of the LED unit modules located at the center The position of each LED unit module in the LED unit module array has another LED unit module whose position is symmetric with respect to the center;

   And in any two mutually symmetric LED unit modules, each color LED chip is located at the two LEDs The position in the unit module is also symmetrical about the center.
4. The illuminating device according to claim 3, wherein said LED unit module array comprises at least two columns of LEDs The unit modules are arranged in parallel in parallel to form an array of circular or regular polygons, wherein the positive electrode connector groups of the LED unit modules in the same column are directed in the direction of the negative electrode connector group, and the LEDs of any two adjacent columns are aligned. The anode module group of the unit module is directed in the opposite direction to its negative connector group.
5. The illuminating device according to claim 1, wherein the LED unit module array includes only one LED unit module, and the LED The arrangement of the LED chips in the unit module is rotationally symmetric about its center; the direction of the lines connecting all the LED unit modules in series includes at least two directions, so that the LEDs on different running lines The rotation angles of the unit modules are different so that the LED chips of any one color have substantially the same distribution at each position in the LED unit module.
6. The illuminating device according to claim 5, wherein in the array of LED unit modules, the direction of the line includes m directions, wherein the m m is 2, 3 or 4 for the number of LED chips included in the LED chipset;

    The rotation angle of the LED unit module in each direction is a multiple of 360/m.
7. The illuminating device according to claim 6, wherein the array of LED unit modules has a rectangular array, wherein each LED unit module comprises four LED chip;

   In the first partial column number, the positive electrode connector group of the LED unit module on each row points in the direction of the negative electrode connector group and is perpendicular to the direction of the column, and on any adjacent two rows. The positive electrode assembly of the LED unit module is directed in the opposite direction to its negative connector group;

   In the remaining number of columns, the positive electrode connector group of the LED unit module on each column points in the direction of the negative electrode connector group and is parallel to the direction of the column, and on any adjacent two columns The positive electrode assembly of the LED unit module is oriented in the opposite direction to its negative connector group.
8. A lighting device according to claim 5, wherein said LED The unit module array is composed of at least two concentrically arranged rings, wherein on each ring, in a counterclockwise direction, the rotation angle of each LED unit module is an arithmetic progression, wherein the tolerances of the difference series are Absolute value 360/n degrees, where n is the number of LED unit modules on the ring.
9. The illumination device of claim 1 wherein said array of LED unit modules comprises two different LED unit modules, wherein each LED The unit module includes four LED chips that are rotationally symmetric about the center;

   Each of the LED unit modules is located in the opposite two line directions.
10. A projection system comprising the light-emitting device according to any one of claims 1 to 9.

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