Light emitting diode displays with light emitting diode pairs and integrated circuits in light emitting diode packages

Abstract

To solve the problem in which previously, under low brightness conditions, there were issues such as the occurrence of unpleasant flicker and the lowness of achieving certain color spaces.SOLUTION: A light emitting diode (LED) device comprises: a circuit board; a plurality of LED packages arranged on the circuit board, the LED package comprising a pair of red LEDs arranged adjacent to one another, the pair of red LEDs configured to emit respective red light at respective different red wavelengths, a pair of green LEDs arranged adjacent to one another, the pair of green LEDs configured to emit respective green light at respective different green wavelengths, and a pair of blue LEDs arranged adjacent to one another, the pair of blue LEDs configured to emit respective blue light at respective different blue wavelengths. The LED device further comprises: an integrated circuit (IC) configured to independently control the pair of red LEDs, the pair of green LEDs and the pair of blue LEDs; and an electrical connector connected to respective integrated circuits of the plurality of LED packages, the electrical connector configured to communicate with an image providing device.SELECTED DRAWING: Figure 2A

Description

[Technical Field]

[0001] FIELD OF THE INVENTION This disclosure relates generally to light emitting diode displays, and more particularly to light emitting diode displays having a pair of light emitting diodes and an integrated circuit integrated within a light emitting diode package. [Background technology]

[0002] Cinema light-emitting diode (LED) displays use passively driven LEDs, which can result in annoying flicker, especially under low-light conditions. Furthermore, achieving a specific color space with LED displays is difficult. Furthermore, projection cinema systems place audio behind the screen to achieve an immersive center channel. In contrast, cinema LED displays face the challenge of achieving comparable immersive audio and often rely on more complex audio steering and bounce techniques.

[0003] Similarly, LED displays may be adapted for simulator environments, some of which may use night vision goggles (NVGs), for example, to simulate the use of NVGs in real-world environments. Adapting LED displays for such simulator environments presents unique challenges. [Brief explanation of the drawings]

[0004] For a better understanding of the various embodiments described herein, and to show more clearly how they may be carried into effect, reference will now be made, by way of example only, to the accompanying drawings, in which:

[0005] [Figure 1A] 1 is a schematic front view of an example of a prior art light emitting diode (LED) display; [Figure 1B] FIG. 1B is a schematic diagram of the rear side of the exemplary LED display of FIG. 1A according to the prior art. [Figure 2A] 1 is a front schematic diagram illustrating an exemplary LED display including a light-emitting diode pair and an integrated circuit in an LED package. [Figure 2B] 2B is a schematic diagram of the rear side of the exemplary LED display of FIG. 2A. [Figure 3] 2B is a front schematic view of an LED package of the exemplary light emitting diode display of FIG. 2A. [Figure 4] FIG. 4 is a schematic rear view of the LED package of FIG. 3. [Figure 5] 4 is a graph illustrating exemplary wavelengths emitted by the LEDs of the LED package of FIG. 3. [Figure 6] 1A and 1B or the LED display of Figures 2A and 2B, the LED package includes multiple groups of RGB LEDs and an infrared LED, and optionally includes an integrated circuit. [Figure 7] 7 is a schematic diagram of the rear side of the exemplary alternative LED package of FIG. 6, excluding the integrated circuit. [Figure 8] 7 illustrates a circuit for driving LEDs in a row arrangement in the exemplary alternative LED package of FIG. 6 , excluding the integrated circuits. [Figure 9] 7 illustrates a circuit for driving LEDs in a string arrangement in the exemplary alternative LED package of FIG. 6, where the exemplary alternative LED package of FIG. 6 excludes the integrated circuit. [Figure 10] 1 is a front schematic diagram illustrating an exemplary alternative LED package including a light emitting diode pair, an integrated circuit, and an infrared LED. [Figure 11] 1 is a front schematic diagram illustrating an exemplary alternative LED package with multiple light emitting diode pairs, an infrared LED, and an optional integrated circuit. [Figure 12A]5 illustrates the rear side of the two series-connected LED packages of FIG. 4 with a fault detected at the serial input contact of the second LED package of the series-connected LED packages. [Figure 12B] 12B illustrates the series-connected LED packages of FIG. 12A, where a first LED package of the series-connected LED packages is bypassed through a bypass contact of a second LED package of the series-connected LED packages. DETAILED DESCRIPTION OF THE INVENTION

[0006] Cinema light-emitting diode (LED) displays use passively driven LEDs, which can cause flicker, especially under low-luminance conditions. They also face many challenges in achieving specific color spaces and audio performance used in cinemas, such as the ITU-R (International Telecommunication Union Radiocommunication) Recommendation BT (Broadcast Television).2020 color space (hereafter interchangeably referred to as REC 2020).

[0007] Additionally, some simulator environments may employ LED displays, and some simulator environments may use night vision goggles (NVGs), for example, to simulate the use of NVGs in a real environment.

[0008] Currently available LED displays can offer flicker-free operation, support for the REC2020 color space, integrated circuits (ICs) integrated with the LED display's LED package, and audio transparency.

[0009] Currently available LED displays include multiple LED packages, where a given LED package typically consists of two sets of red, green, and blue (RGB) LEDs configured to emit different wavelengths of light relative to the six primary colors (e.g., using any suitable wavelength-shifting mechanism) to support the REC2020 color space. The given LED package further includes an integrated circuit (IC) that drives the six LEDs of the given LED package. This integration not only simplifies the printed circuit board assembly (PCBA) of the given LED package, but also allows for perforations to support audio transparency, improving the overall cinematic experience.

[0010] In particular, the LED package provided herein includes two sets of RGB LEDs. Each set of LEDs of a given color may have a different wavelength, such that the LED package emits two red wavelengths, two green wavelengths, and two blue wavelengths. In this way, the LED package can emit six primary colors, which can be used to expand the color space of the LED package compared to when the LED package includes a single set of RGB LEDs. For example, the LED package provided herein may support the REC2020 color space.

[0011] Alternatively, or in addition, multiple LED packages containing six primary colors (e.g., two red, two green, and two blue) may be integrated into an LED display capable of operating in a three-dimensional mode. When used in combination with, for example, 3D glasses incorporating notch filters in the left and right lenses, they receive different wavelength sets of RGB light, eliminating the need for low visual fidelity and / or low visual clarity polarized 3D glasses (and polarizers within LED displays) and providing a more comfortable and immersive viewing experience in place of expensive active shutter 3D glasses.

[0012] Integrating the LED driver IC into the LED package (e.g., one IC per LED package) reduces PCBA complexity and potentially reduces manufacturing costs. For example, current LED packages may require as few as two printed circuit boards (PCBs) to manufacture.

[0013] The reduced complexity of such LED packages (e.g., compared to using an external IC to drive the LEDs in multiple LED packages) allows for holes in the supporting circuit board to be drilled, making the circuit board transparent to audio. This allows audio from speakers mounted behind the LED display according to embodiments of the present invention to pass through the LED display, improving synchronization between visual and auditory elements in cinema environments in which the LED display is used. Such ICs integrated into the LED package can include a bypass input for redundancy in case an upstream pixel fails.

[0014] The LED displays provided by the present invention can be used in digital cinema environments, entertainment venues requiring high quality RGB LED displays, and / or any application and / or environment requiring advanced color reproduction, passive 3D viewing, and / or audio transparency.

[0015] Currently available LED displays, whether or not an IC is integrated into the LED package, can be further adapted to the simulator environment.

[0016] One aspect of the present specification includes a circuit board; a plurality of light-emitting diode (LED) packages arranged on the circuit board, the LED packages including: a pair of red LEDs arranged adjacent to each other, the pair of red LEDs configured to emit respective red light at different red wavelengths; a pair of green LEDs arranged adjacent to each other, the pair of green LEDs configured to emit respective green light at different green wavelengths; a pair of blue LEDs arranged adjacent to each other, the pair of blue LEDs configured to emit respective blue light at different blue wavelengths; an integrated circuit (IC) configured to independently control the pair of red LEDs, the pair of green LEDs, and the pair of blue LEDs; and an electrical connector connected to each integrated circuit of the plurality of LED packages, the electrical connector configured to communicate with an image providing device.

[0017] Another aspect of the present specification is a light emitting diode (LED) package that includes: a pair of red LEDs positioned adjacent to each other, the pair of red LEDs configured to emit respective red light at respective different red wavelengths; a pair of green LEDs positioned adjacent to each other, the pair of green LEDs configured to emit respective green light at respective different green wavelengths; a pair of blue LEDs positioned adjacent to each other, the pair of blue LEDs configured to emit respective blue light at respective different blue wavelengths; and an integrated circuit (IC) configured to independently control the pair of red LEDs, the pair of green LEDs, and the pair of blue LEDs.

[0018] Another aspect of the present specification is a device comprising: a circuit board; a plurality of light-emitting diode (LED) packages disposed on the circuit board, the LED packages including a plurality of groups of red, green, and blue (RGB) LEDs and an infrared LED, wherein the plurality of groups of RGB LEDs and the infrared LED are in a ratio of at least 2 to 1; and an electrical connector connected to the LEDs of the plurality of LED packages, the electrical connector configured to communicate with an image providing device.

[0019] Another aspect of the present specification is a light emitting diode (LED) package, the LED package including multiple groups of red, green, and blue (RGB) LEDs and an infrared LED, wherein the multiple groups of RGB LEDs and the infrared LED are arranged in a ratio of at least 2:1.

[0020] 1A and 1B, respectively, depict the front and back of an exemplary light-emitting diode (LED) display 100 according to the prior art. As shown most clearly in FIG. 1A, the LED display 100 comprises a circuit board 102 having a plurality of LED packages 104 mounted on its front side. While only one LED package 104 is shown, it will be understood that the LED display 100 comprises eight rows of ten LED packages 104 per row.

[0021] A given LED package 104 is composed of one red LED 106R, one green LED 106G, and one blue LED 106B. Hereinafter, the LEDs 106R, 106G, and 106B will be collectively referred to as LEDs 106, and generally referred to as LEDs 106. This notation will be used throughout this specification.

[0022] Thus, while a given LED package 104 may emit one wavelength of red light, one wavelength of green light, and one wavelength of blue light, it is understood that such emission of red, green, or blue light may span a predetermined wavelength range centered around a particular red, green, or blue wavelength. Accordingly, hereinafter, reference to an LED 106 emitting light of one wavelength will be understood to include such a wavelength range. Similarly, hereinafter, reference to two LEDs 106 emitting light of the same predetermined color but different wavelengths will be understood to include two LEDs 106 emitting light of the same predetermined color but different wavelength ranges.

[0023] 1A , the LED display 100 includes a plurality of ICs 108, each driving a respective LED 106 in a plurality of LED packages 104. In particular, the number of ICs 108 is less than the total number of LED packages 104, and a given IC 108 drives multiple LEDs 106 in multiple LED packages 104.

[0024] In other words, a single IC 108 is used to drive a grid of LED packages, such that the LED packages 104 typically form a passive matrix. Therefore, line scanning is typically used to drive the LEDs 106 of the LED packages 104, which inherently induces line flicker. Furthermore, in certain embodiments, the IC 108 may have 48 channels to control 16 RGB LEDs 106 using 32 lines, which may require at least eight PCB layers to form the circuit board 102. For example, the LED driver of the IC 108 may, in some instances, control 16 LEDs (e.g., a 16-channel driver) or 48 LEDs (a 48-channel driver), or even a higher number of LEDs with a driver with a higher channel count. In such instances, the LED driver of the IC 108 is electrically connected to multiple columns and multiple lines (e.g., rows), sometimes referred to as a line scan group. Line scan groups can have as few as four rows or as many as 128 rows, although any suitable number of rows is contemplated within the scope of this specification. The more physical LEDs connected to IC 108, the more complex the PCB layout to control them becomes. The PCB layout can vary widely from 4 to 12 layers, depending on the pixel pitch and number of columns and lines (e.g., rows) of the LEDs.

[0025] Although only one IC 108 is shown, it is understood that the LED display 100 includes six rows of ICs 108, with four ICs 108 arranged in each row. Connections between the ICs 108 and the LED packages 104 (e.g., and / or LEDs 106) may not be shown and / or may be located internal to the circuit board 102 for simplicity, although it is understood that such connections exist. Furthermore, while a predetermined number of ICs 108 are shown for each predetermined number of LED packages 104, the actual number of ICs 108 may vary depending on the number of LED drivers for the ICs 108, as discussed above. In other words, any suitable number of ICs 108, and such suitable number of ICs 108, depending on the number of predetermined LED packages 104, is understood to be included herein.

[0026] It will further be understood that the illustrated LED display 100 will typically include millions of LED packages 104, e.g., one LED package 104 per pixel of the predetermined resolution, to achieve a predetermined resolution of the image formed by the LED display 100, and the number of ICs 108 will be adjusted accordingly.

[0027] 1B , the LED display 100 further includes a rear-side disposed electrical connector 110. The connection between the electrical connector 110 and the IC 108 may not be shown for simplicity and / or may be located internal to the circuit board 102, although it is understood that such a connection exists. It will be understood that the electrical connector 110 may be used to connect the IC 108 to an external image-providing device, such as an image generation device and / or image playback device and / or video generation device and / or video playback device, that generates and / or plays images and / or videos rendered by the LEDs 106 of the LED display 100.

[0028] As a result, the color space of the LED display 100 is limited by the wavelength of the LEDs 106, and further, due to at least the complexity of connecting the ICs 108 to the LED packages 104, the number of PCBs used to manufacture the LED display 100 may be eight or more, making it difficult to manufacture.

[0029] Attention is first directed to Figures 2A and 2B, which show the front and back, respectively, of a light emitting diode (LED) display 200 according to an embodiment of the present invention.

[0030] As best shown in Figure 2A, the LED display 200 includes a circuit board 202 having a plurality of LED packages 204 mounted on its front side. While only one LED package 204 is shown in Figure 1, it is understood that the LED display 200 includes eight rows of LED packages 204, with ten LED packages 204 arranged in each row. A given LED package 204 includes a pair of red LEDs 206R-1, 206R-2, a pair of green LEDs 206G-1, 206G-2, and a pair of blue LEDs 206B-1, 206B-2, as well as an IC 208.

[0031] Hereinafter, the red LEDs 206R-1 and 206R-2 will be collectively referred to as red LEDs 206R and collectively referred to as red LEDs 206R. Similarly, the green LEDs 206G-1 and 206G-2 will be collectively referred to as green LEDs 206G and collectively referred to as green LEDs 206G. Similarly, the blue LEDs 206B-1 and 206B-2 will be collectively referred to as blue LEDs 206B and collectively referred to as blue LEDs 206B. Similarly, the LEDs 206R, 206G, and 206B will be collectively referred to as LEDs 206 and collectively referred to as LEDs 206.

[0032] Please refer to FIGS. 3 and 4, which respectively show the front and back sides of an exemplary LED package 204 according to this embodiment.

[0033] In particular, LED display 200 comprises a plurality of LED packages 204 disposed on a circuit board 202. Referring to Figure 3, the exemplary LED package 204 comprises a pair of red LEDs 206R disposed adjacent to each other, the pair of red LEDs 206 being configured to emit respective red light at different red wavelengths, a pair of green LEDs 206G disposed adjacent to each other, the pair of green LEDs 206G being configured to emit respective green light at different green wavelengths, and a pair of blue LEDs 206B disposed adjacent to each other, the pair of blue LEDs 206B being configured to emit respective blue light at different blue wavelengths.

[0034] In particular, the LEDs 206 may be arranged adjacent to each other, such that a pair of red LEDs 206R are adjacent to each other in a row configuration, a pair of green LEDs 206G are adjacent to each other in a row configuration, and a pair of blue LEDs 206B are adjacent to each other in a row configuration. However, the LEDs 206 may alternatively be arranged in respective columns. In general, however, an LED 206 may be arranged adjacent to LEDs 206 of the same color, such that the same colors (albeit with different wavelengths) have similar geometric characteristics to a viewer of the LED display 200.

[0035] 3, the exemplary LED package 204 further includes an integrated circuit (IC) 208 configured to independently control a pair of red LEDs 206R, a pair of green LEDs 206G, and a pair of blue LEDs 206B. The LEDs 206 are described in more detail below.

[0036] The connections between the IC 208 and the LEDs 206 of a given LED package 204 may not be shown for simplicity and / or may be located internal to the given LED package 204, although it is understood that such connections exist.

[0037] 2B , the LED display 200 further includes a rear-side disposed electrical connector 210. The connection between the electrical connector 210 and the IC 208 may not be shown for simplicity and / or may be located internal to a given circuit board 202, although it is understood that such a connection exists. It is understood that the electrical connector 210 may be used to connect the IC 208 to an external image providing device (not shown), such as an image generating device and / or an image reproducing device and / or a video generating device and / or a video reproducing device, that generates and / or reproduces images and / or videos rendered by the LEDs 206 of the LED display 200.

[0038] In particular, an electrical connector 210 is connected to each integrated circuit 208 of the plurality of LED packages 204, and the electrical connector 210 is configured to communicate with an image providing device (not shown).

[0039] Although the integrated circuits 208 of each of the multiple LED packages 204 are illustrated as being located on the front side of each of the LED packages 204, in other examples, one or more (or all) of the integrated circuits 208 may be located on the rear side of each of the LED packages 204.

[0040] It will further be understood that the illustrated LED display 200 will typically include millions of LED packages 204, e.g., one LED package 204 per pixel of the predetermined resolution, to achieve a predetermined resolution of the image formed by the LED display 100, and the number of ICs 208 will be adjusted accordingly. Although the LED packages 204 are illustrated as being a particular shape (e.g., square) and arrangement, the LED packages 204 may be of any suitable shape and arrangement.

[0041] Furthermore, the number of ICs 208 may be the same as the total number of LED packages 204 , so that a given IC 208 drives six LEDs 206 in one LED package 204 .

[0042] It is further understood that a given IC 208 may have six output channels, eg, one output channel for each LED 206 .

[0043] 2A and 2B, the circuit board 202 may further include perforations 212 that allow sound to travel through the circuit board 202. As such, one or more speakers (not shown) may be mounted on the rear side of the LED display 200, and the perforations 212 may allow sound emitted from the speaker(s) to travel through the LED display 200 to an audience. However, the perforations 212 may be optional, and conventional acoustic techniques (e.g., audio steering or bounce techniques) may be used to transmit sound to an audience.

[0044] 2A and 2B, the circuit board 202 may further include perforations 212 that allow sound to travel through the circuit board 202, and these perforations may be located between adjacent LED packages 204 outside the area of ​​the electrical connectors 210. In particular, as best shown in FIG. 2A , a given perforation 212 may be located between four adjacent LED packages 204. Although a given number and arrangement of perforations 212 is illustrated, the LED display 200 may be configured with any suitable number and arrangement of perforations 212.

[0045] In particular, the LED display 200 may have dimensions ranging from approximately 160 mm x 120 mm to approximately 270 mm x 270 mm, the LED package 204 may have dimensions ranging from approximately 0.2 mm x 0.2 mm to approximately 5 mm x 5 mm, and the pixel pitch may range from approximately 2.5 mm to approximately 5 mm, or even larger (e.g., depending on the dimensions of the LED package 204). Furthermore, it will be understood that the LED display 200 can be combined with other LED displays 200 to assemble into larger LED displays having any suitable dimensions. For example, LED displays 200 of such dimensions may be tiled together to form larger LED displays, including, for example, cinema environments, simulation environments, and other possibilities. In a specific example, the LED display 200 is approximately 0.5 meters x approximately 0.5 meters, the LED package 204 is approximately 1 millimeter x approximately 1 millimeter, and the pixel pitch is approximately 2.5 millimeters.

[0046] Attention is now directed to Figure 4, which depicts the back side of LED package 204. In particular, Figure 4 illustrates various contacts to electrical connector 210 that may be connected to IC 208 of Figure 3. In particular, Figure 4 depicts a serial-in SI contact, a serial-out SO contact, a bypass B contact, a first voltage V1 contact, a second voltage V2 contact, and a ground connector G.

[0047] The serial-in SI and serial-out SO contacts may be used to connect the ICs 208 in one LED package 204 to the ICs 208 in other LED packages 204, and a data addressing scheme may be used to control the LEDs 206 in the LED packages 204. For example, each IC 208 in the LED display 200 is assigned an address, and the image reproduction device may provide LED drive data for the predetermined address to the connected SI and SO contacts of the LED packages 204 via the electrical connector 210. The ICs 208 may receive the LED drive data for the predetermined address assigned to them and drive their respective LEDs 206 accordingly.

[0048] In some examples, the serial-in SI contact and serial-out SO contact can provide a single, one-wire serial interface for common-clock connection with an external image-providing device via electrical connector 210. For example, the serial-in SI contact and serial-out SO contact may be used to daisy-chain the ICs 208 of the LED packages 204 into rows and / or columns.

[0049] Alternatively, a two-wire serial interface using a separate clock can be employed, with the data addressing scheme adapted appropriately.

[0050] Whether using a one-wire serial interface or a two-wire serial interface, the ICs 208 mounted on the LED packages 204 can be addressed such that the LED packages 204 are understood to be arranged in an active matrix, allowing an external image providing device to independently drive the LED packages 204. In this manner, line flicker for the LED display 100 can be reduced and / or eliminated because line scanning is not required.

[0051] In other words, LED drive data transmitted over a one-wire or two-wire serial interface used to drive the LEDs 206 of the LED package 204 may be transmitted (e.g., by an external image providing device) along with the respective addresses of the LED packages 204 and / or ICs 208 that the LED drive data is intended to drive.

[0052] As depicted, the bypass B contacts are used to bypass the corresponding LED package 204, for example, in the event of a failure of one or more of the LEDs 206. Briefly focusing on FIGS. 12A and 12B, for example, these illustrate the rear sides of two serially connected LED packages 204-1 and 204-2, each including the contacts described with reference to FIG. 4 and respective ICs 208-1 and 208-2 (drawn in outline to indicate that the respective ICs 208-1 and 208-2 are located on the front side of the LED packages 204-1 and 204-2). In FIGS. 12A and 12B, the serial-in SI contact of the first LED package 204-1 receives a signal from the serial-out SO contact of the previous LED package 204, which is not depicted, and the serial-in SI contact of the second LED package 204-2 receives a respective signal from the serial-out SO contact of the first LED package 204-1. Such signals are depicted as single-headed arrows. Additionally, the serial-out SO contact of the second LED package 204-2 outputs a signal to the serial-in SI contact of the next LED package 204, which is not depicted.

[0053] In particular, in FIG. 12A , the second IC 208-2 detects that the signal received at the serial-in SI contact of the second LED package 204-2 is unstable or missing due to the word “FAULT” appearing on the signal received at the serial-in SI terminal of LED package 204-2. Indeed, in such an example, although the signal received at the serial-in SI contact of the second LED package 204-2 is depicted in FIG. 12A , it is understood that such a signal may be missing. Furthermore, it is understood that such a fault detected at the serial-in SI contact of the second LED package 204-2 is due to the first IC 208-1 of the first LED package 204-1 having failed (as shown).

[0054] 12B, IC 208-2 disconnects the serial-in SI contact of LED package 204-2 from the serial-out SO contact of LED package 204-1 and connects the serial-in SI contact of LED package 204-1 to a bypass from the serial-out SO contact of LED package 204-1 to the bypass B contact of the second LED package 204-2, which can be accomplished, for example, by opening and closing switches between various contacts between the existing connections.

[0055] Alternatively, or in addition, the ICs 208 of the LED packages 204 may communicate (e.g., which may include communication with the ICs 208 of the LED packages 204 with which a signal is received at the serial-in SI contact of the first LED package 204-1) so that the signal received at the serial-in SI contact of the first LED package 204-1 is redirected to the bypass B contact of the second LED package 204-2, where it is processed to drive the LEDs 206 of the second LED package 204-2. Indeed, such communication may occur due to the use of the bypass B contact to bypass any LED package 204 that has detected a fault or similar anomaly.

[0056] In other words, the bypass B contact of the second LED package 204-2 may be used to bypass the first (e.g., previous) LED package 204-1 in the chain of serially connected LED packages 204 upon a fault signal detected at the serial-in SI contact of the second LED package 204-2. Indeed, such an embodiment illustrates that the connections between the respective contacts may be comprised of any suitable type and / or number of connections, that such connections may be made via the respective ICs 208, and that such connections may be, for example, opened (disconnected) or closed (connected) by the respective ICs 208 via any suitable number of switches controlled by the respective ICs 208.

[0057] 4, two separate LED voltages may be provided from the external image reproduction device to contacts V1, V2 via electrical connector 210, with the first contact V1 connecting a first voltage from electrical connector 210 to green LED 206G and blue LED 206B, and the second contact V2 connecting a second voltage from electrical connector 210 to red LED 206R. The second voltage may be lower than the first voltage because red LEDs generally tend to be driven at lower voltages than green and blue LEDs. Furthermore, voltage may be provided by the external image providing device via electrical connector 210 or any other suitable device (e.g., a voltage providing device that is the same as or different from the external image providing device).

[0058] Although FIG. 4 shows a particular number and arrangement of connections to IC 208, it will be understood that the number and arrangement of connections to IC 208 may be in any suitable number and / or arrangement and / or configuration.

[0059] Furthermore, it will be appreciated that the circuit board 202 of the LED display 200 may have at least two PCB layers because the connection from the electrical connector 210 to the IC 108 is simplified compared to the connection to the IC 108 in the circuit board 102 of the LED display 100, thereby increasing a relatively large amount of unused PCB area. Such unused PCB area allows for a higher density of perforations 212 for the aforementioned speakers to pass through the circuit board 202 and achieve audio transparency.

[0060] Furthermore, because the number of PCB layers is reduced compared to the circuit board 102 of the LED display 100, the circuit board 202 is formed from a flexible material, and the LED display 200 and / or the circuit board 202 can be configured to be bent.

[0061] Furthermore, it is understood that the two PCB layers of circuit board 202 are easier to assemble than the eight PCB layers of circuit board 102.

[0062] Attention is now directed to FIG. 5, which illustrates a graph 500 showing exemplary wavelengths emitted by LED 206.

[0063] For example, as depicted, a first red LED 206R-1 may emit red light at a first red wavelength 502R-1, and a second red LED 206R-2 may emit red light at a second red wavelength 502R-2 (e.g., red wavelength 502R and / or red wavelength 502R). Red wavelength 502R is generally understood to be in the "red" wavelength range (e.g., in the range of about 620 nm to about 750 nm).

[0064] Similarly, as depicted, a first green LED 206G-1 may emit green light at a first green wavelength 502G-1, and a second green LED 206G-2 may emit green light at a second green wavelength 502G-2 (e.g., green wavelength 502G and / or green wavelength 502G). Green wavelength 502G is generally understood to fall within the "green" wavelength region (e.g., a range of about 495 nm to about 570 nm).

[0065] Similarly, as depicted, first blue LED 206B-1 may emit blue light at a first blue wavelength 502B-1, and second blue LED 206B-2 may emit blue light at a second blue wavelength 502B-2 (e.g., blue wavelength 502B and / or blue wavelength 502B). Blue wavelength 502B is generally understood to be in the "blue" wavelength region (ranging from about 380 nm to about 495 nm).

[0066] In particular, the exact values ​​of wavelengths 502R, 502G, 502B can be selected such that in combination, LED 206 defines the color gamut of a predetermined color space, such as the REC2020 color space, among other possibilities.

[0067] Further, as depicted, the pair of red wavelengths 502R, the pair of green wavelengths 502G, and the pair of blue wavelengths 502B may be spaced apart, for example, by approximately 20 nm peak-to-peak, so that the LED display 200 can operate in a 3D mode, assuming that the corresponding left lenses of the 3D glasses are configured to transmit the wavelengths 502R-1, 502G-1, and 502B-1, respectively, and to block or reflect the wavelengths 502R-2, 502G-2, and 502B-2, respectively, and that the corresponding right lenses of the 3D glasses are configured to transmit the wavelengths 502R-2, 502G-2, and 502B-2, respectively, and to block or reflect the wavelengths 502R-1, 502G-1, and 502B-1 (or vice versa).

[0068] Such wavelength separation can be achieved by any suitable method, including, but not limited to, incorporating quantum dots during the manufacture of the LED 206, epitaxial growth during the manufacture of the LED 206, or other possibilities.

[0069] In this manner, the LED display 200 can be operated in at least two modes: a first mode includes an extended color gamut mode in which a pair of red wavelengths 502R, a pair of green wavelengths 502G, and a pair of blue wavelengths 502B can be used to define a REC2020 color space, etc.; a second mode includes a 3D mode in which a pair of red wavelengths 502R, a pair of green wavelengths 502G, and a pair of blue wavelengths 502B can be used to provide a left-right 3D image, etc., but with a narrower color gamut relative to the extended color gamut mode.

[0070] In other words, each distinct red wavelength 502R, each distinct green wavelength 502G, and each distinct blue wavelength 502B may be selected to comply with the ITU-R (International Telecommunication Union Radiocommunication Sector) Recommendation BT (Broadcast Television).2020 color space.

[0071] Alternatively, or in addition, each distinct red wavelength 502R, each distinct green wavelength 502G, and each distinct blue wavelength 502B can be selected to be at least 20 nm apart so that LED display 200 can operate in a 3D mode.

[0072] Therefore, when the LED display 200 is installed in, for example, a movie theater environment, the LED display 200 can be operated in a first mode or a second mode depending on whether the video provided to the LED display 200 includes images and / or video in the REC2020 color space or 3D images and / or video. Thus, the LED package 204 provides versatility in presenting images and / or video.

[0073] Other types of LED packages are within the scope of this specification.

[0074] For example, some LED displays may be used in transportation simulators, such as, but not limited to, aircraft simulators, land vehicle simulators, and water vehicle simulators. In certain types of simulators, night vision goggles (NVGs) may be used, for example, to simulate the use of NVGs in a real-world environment. However, with reference to FIG. 5, the RGB LEDs provided herein generally do not emit infrared (IR) light that is detected and rendered by NVGs.

[0075] Furthermore, experience has shown that infrared images (IR images) in simulators used with NVGs generally do not require the same spatial resolution as RGB images.

[0076] Thus, provided herein is another example LED package including multiple groups of RGB LEDs and an IR LED. The multiple groups of RGB LEDs are used to form an RGB image in a wavelength range visible to humans even without an NVG (e.g., about 380 nm to about 750 nm), and the IR LED can be used to provide a lower-resolution IR image detectable by an NVG. Because an RGB LED group generally corresponds to one pixel in the RGB image and an IR LED generally corresponds to one pixel in the corresponding IR image, it is understood that when the number "N" of groups of RGB LEDs in the LED package is a predetermined ratio to the number of IR LEDs, the resolution and / or number of pixels in the RGB image is N times the resolution of the corresponding IR image.

[0077] For example, attention is now directed to Figure 6, which illustrates the front side of an alternative LED package 604 that may be used with the LED display 100 shown in Figures 1A and 1B or in combination with the LED display 200 of Figures 2A and 2B. However, as will be discussed below, when LED package 604 is used in combination with the LED display 100 of Figures 1A and 1B, LED package 604 may omit the respective ICs, and when LED package 604 is used in combination with the LED display 200 of Figures 2A and 2B, LED package 604 may include the respective ICs.

[0078] In other words, the LED package 604 may be a component of a device (e.g., LED display 100 or LED display 200) that includes the following components: a circuit board (e.g., circuit board 102 or circuit board 202), a plurality of light-emitting diode (LED) packages 604 disposed on the circuit board, and an electrical connector (e.g., electrical connector 110 or electrical connector 210) connected to the LEDs of the plurality of LED packages 604, the electrical connector being configured to communicate with an image-providing device as described above.

[0079] In particular, as depicted, LED package 604 comprises a first group of red LEDs 606R-1, green LEDs 606G-1, and blue LEDs 606B-1, a second group of red LEDs 606R-2, green LEDs 606G-2, and blue LEDs 606B-2, a third group of red LEDs 606R-3, green LEDs 606G-3, and blue LEDs 606B-3, and a fourth group of red LEDs 606R-4, green LEDs 606G-4, and blue LEDs 606B-4.

[0080] Hereinafter, the first group of LEDs 606R-1, 606G-1, and 606B-1 will be collectively and interchangeably referred to as the first group of LEDs 606-1. LEDs 606R-2, 606G-2, and 606B-2 will be collectively and interchangeably referred to as the second group of LEDs 606-2. The third group of LEDs 606R-3, 606G-3, and 606B-3 will be collectively and interchangeably referred to as the third group of LEDs 606-3. The fourth group of LEDs 606R-4, 606G-4, and 606B-4 will be collectively and interchangeably referred to as the fourth group of LEDs 606-4.

[0081] Hereinafter, red LEDs 606R-1, 606R-2, 606R-3, and 606R-4 will be referred to interchangeably below as red LED 606R, green LEDs 606G-1, 606G-2, 606G-3, and 606G-4 will be referred to interchangeably below as green LED 606G, and blue LEDs 606B-1, 606B-2, 606B-3, and 606B-4 will be referred to interchangeably below as blue LED 606B.

[0082] Additionally, LEDs 606R, 606G, 606B are hereinafter referred to interchangeably as LEDs 606 and / or LED 606.

[0083] The red LED 606R, the green LED 606G, and the blue LED 606B may emit light at respective wavelengths 502R-1, 502G-1, 502B-1, or respective wavelengths 502R-2, 502G-2, 502B-2, or any suitable wavelength within the red wavelength range, the green wavelength range, and the blue wavelength range, respectively.

[0084] The IR LED 607 may be configured to emit infrared light, for example, in an infrared wavelength range of about 750 nm to about 1000 nm. In a particular example, the IR LED 607 may emit infrared light at about 800 nm.

[0085] In any event, as depicted, the LED package 604 is comprised of multiple groups of red, green, and blue (RGB) LEDs 606 and infrared LEDs 607, with the multiple groups of RGB LEDs 606 and the infrared LEDs 607 in a ratio of at least 2:1.

[0086] In other words, although the groups of RGB LEDs 606 and infrared LEDs 607 are in a 4:1 ratio as depicted, the LED package 604 may include at least two groups of RGB LEDs 606.

[0087] However, as depicted, in the LED package 604, the groups of RGB LEDs 606 and the infrared LEDs 607 may be arranged in a 4:1 ratio, and the groups of RGB LEDs 606 may be arranged at each corner of a square (e.g., as depicted) or a rectangle, and the infrared LEDs 607 may be arranged approximately in the center of the square or rectangle.

[0088] However, if the LED package 604 is composed of two groups of RGB LEDs 606, the groups of RGB LEDs 606 may be arranged along a line, and the infrared LED 607 may be positioned approximately midway between the two groups of RGB LEDs 606 along that line.

[0089] However, if the LED package 604 is composed of three groups of RGB LEDs 606, the groups of RGB LEDs may be arranged at each corner of a triangle (e.g., an equilateral triangle), and the infrared LED 607 may be arranged approximately at the center of the triangle.

[0090] In other words, if the LED package 604 is composed of three or more groups of RGB LEDs 606, these groups of RGB LEDs 606 can be arranged at each corner of a polygon having the same number of sides and corners as the number of LED packages 604, and the infrared LEDs 607 can be arranged near the center of the polygon.

[0091] Indeed, such symmetry of the LEDs 606 and the IRLEDs 607 may provide similar geometric characteristics to a viewer of an LED display incorporating the LED package 604. Such symmetry and / or the ratio of the LEDs 606 to the IRLEDs 607 may provide cost advantages in laying out and manufacturing the LED package 604.

[0092] The LED packages 604 may or may not include respective integrated circuits 608. As such, the integrated circuits 608 depicted in Figure 6 are understood to be optional and are therefore depicted with dashed lines.

[0093] Where the LED packages 604 do not include corresponding integrated circuits 608, the LED packages 604 may be integrated into the LED display 100, for example, in place of the LED packages 104, and it is understood that the LEDs 606, 607 are driven by the IC 108, which is adapted to drive four groups of RGB LEDs 606 (or any suitable number of groups of RGB LEDs 606) and one IR LED 607 per LED package 604.

[0094] However, it is understood that when the LED packages 604 include ICs 608, the LED packages 604 may be integrated into the LED display 200, and the LEDs 606, 607 belonging to each LED package 604 are driven by the corresponding ICs 608.

[0095] In other words, if the LED package 604 includes an IC 608, the IC 608 may be configured to independently control a group of multiple RGB LEDs 606 and an infrared LED 607, and the electrical connector 210 of the LED display 200 may be connected to the LEDs 606, 607 of the multiple LED packages 204 of the LED display 200 via the respective integrated circuits 608 of the multiple LED packages 604.

[0096] Next, we will describe examples where the LED package 604 does not include ICs 608. In these examples, the group of RGB LEDs 606 may be driven in a passive matrix fashion using one or more of the ICs 208 adapted to drive the group of RGB LEDs 606 of the LED package 604 in either a row or column configuration.

[0097] In particular, to reduce the input and output signals required for lighting the depicted groups of RGB LEDs 606 and IR LEDs 607, in some examples, only two groups of RGB LEDs 606 (e.g., two RGB pixels) are driven and / or lit simultaneously, arranged in either a row configuration (e.g., horizontally) or column nodes (e.g., vertically), while the IR LEDs 607 are controlled independently.

[0098] For example, attention is now directed to Figure 7, which depicts the back side of the LED package 604 of Figure 6 when the LED package 604 does not include the IC 608. In particular, Figure 7 depicts nine exemplary contacts for the LEDs 606, 607, the contacts being labeled R13, G13, B13, C13, R24, G24, B24, C24, C5, and IR5. These contacts may be used to drive the RGB LEDs 606 in a row configuration or a column node, and the IR LEDs 607 independent of the RGB LEDs 606, depending on the circuit configuration of the LED package 604.

[0099] 8, which depicts a circuit 800 that may be embedded in the LED package 604, showing connections from nine contacts R13, G13, B13, C13, R24, G24, B24, C24, C5, and IR5 to an RGB LED 606 and an IR LED 607 to drive the RGB LED 606 in a row configuration. In particular, the LEDs 606 and 607 are depicted as transistors, and the contacts R13, G13, B13, C13, R24, G24, B24, C24, C5, and IR5 may be used to drive a pair of RGB LEDs 606-1 and 606-2, or a pair of RGB LEDs 606-3 and 606-4 and an IR LED 607.

[0100] 9, which depicts a circuit 900 that may be embedded in the LED package 604, showing the connections of nine contacts R13, G13, B13, C13, R24, G24, B24, C24, C5, and IR5 to the RGB LEDs 606 and IR LEDs 607 to drive the RGB LEDs 606 in a string configuration. In particular, the LEDs 606 and 607 are depicted as transistors, and the contacts R13, G13, B13, C13, R24, G24, B24, C24, C5, and IR5 may be used to drive a pair of RGB LEDs 606-1 and 606-3 or a pair of RGB LEDs 606-2 and 606-4 and an IR LED 607.

[0101] In general, the LED package 604 may include the circuit 800 or the circuit 900 .

[0102] Alternatively, if IC 608 is included in LED package 604, the rear side of LED package 604 may be the same as or similar to the rear side of LED package 204 as depicted in FIG. 4, and contacts SI, SO, B, V1, V2, and G may be used in a manner similar to that described with reference to FIG. 4. In these examples, it is understood that any suitable data addressing scheme may be used to individually control LEDs 606, 607. Furthermore, in these examples, it is understood that IC 608 is adapted to include at least as many outputs as the number of LEDs 606, 607. For example, with reference to FIG. 6, if LED package 604 includes four groups of RGB LEDs 606 and an IR LED 607, IC 608 may include at least 13 outputs (e.g., one for each of the three RGB LEDs 606 in each of the four groups and one for the IR LED 607).

[0103] It is further understood that if the LED package 604 includes the IC 608, the size of the LED package 604 may be smaller than if the LED package 604 did not include the IC 608.

[0104] For example, in the depicted example, if the LED package 604 does not include an IC 608, the pitch between groups of RGB LEDs 606 may be about 4 mm or less than about 4 mm.

[0105] However, in cases where the LED package 604 includes an IC 608, the pitch between groups of RGB LEDs 606 may be about 1 mm or less.

[0106] When LED package 604 does not include IC 608, the size of LED package 604 is adapted to include circuit 800 or circuit 900, whereas when LED package 604 includes IC 608, relatively less space is required since only connections are required between contacts SI, SO, B, V1, V2, and G and LEDs 606, 607. Furthermore, when LED package 604 includes IC 608, the circuit board of an LED display (e.g., LED display 200) into which LED package 604 is incorporated may be provided with perforations 212 to allow sound transmission.

[0107] Additionally, the LED packages described herein are adaptable for flexible assembly, supporting both flip-chip and wire-bonding techniques, and even the mixing of both techniques within the same LED package. Furthermore, both flip-chip and wire-bonding configurations allow for seamless integration and optimized electrical connections, potentially enabling efficient control and functionality of each LED channel.

[0108] Additionally, while the LED packages described herein may be used in movie theater and / or simulator environments, at least some of the LED packages described herein may be used in any suitable environment where a high density LED display (e.g., pixel pitch less than 2.0 mm) is required, and / or in night vision simulator environments where an LED display with an effective resolution less than 4.0 mm is required, and / or in general lighting applications.

[0109] Furthermore, the various features of the LED packages described herein may be combined in any suitable manner.

[0110] 10, there is depicted a front side of LED package 1004, which has a substantially similar structure to LED package 204, with like-numbered parts having the same function, but adapted to include an IRLED 1007. LED package 1004 is thus capable of operating in at least three modes.

[0111] For example, the LED package 1004 can be operated in a first mode, such as an extended color gamut mode, in which a pair of red wavelengths 502R, a pair of green wavelengths 502G, and a pair of blue wavelengths 502B can be used to define the REC2020 color space.

[0112] Additionally, the LED package 1004 can operate in a second mode consisting of a 3D mode, using a pair of red wavelengths 502R, a pair of green wavelengths 502G, and a pair of blue wavelengths 502B to provide left and right sided 3D images, etc., but operating with a reduced color gamut relative to the extended color gamut mode.

[0113] Additionally, the LED package 1004 can be operated in a third mode consisting of an IR mode, in which the IR LEDs 1007 are used to form an IR image that is the same as or similar to the RGB image formed by the RGB LEDs 206. Alternatively, or additionally, the IR mode can be combined with an extended color gamut mode, in which the IR LEDs 1007 can operate simultaneously with the RGB LEDs 206 operating in the extended color gamut mode. Alternatively, or additionally, the IR mode can be combined with a 3D mode, in which the IR LEDs 1007 can operate simultaneously with the RGB LEDs 206 operating in the 3D mode.

[0114] Alternatively, or additionally, LED package 604 may be adapted to include a pair of RGB LEDs similar to LED package 204. For example, referring to Figure 11, there is shown the front side of LED package 1104, which is substantially similar to LED package 604, with like-numbered parts having the same function, but adapted to include a pair of LEDs 606, as will now be described.

[0115] For example, as depicted in FIG. 11 and with reference to FIG. 5, the groups of RGB LEDs 606 include a first group, which includes a pair of red LEDs 606R-1-1, 606R-1-2 configured to emit, for example, respective wavelengths 502R-1, 502R-2, a pair of green LEDs 606G-1-1, 606G-1-2 configured to emit, for example, respective wavelengths 502G-1, 502G-2, and a pair of blue LEDs 606B-1-1, 606B-1-2 configured to emit, for example, respective wavelengths 502B-1, 502B-2.

[0116] Similarly, the group of RGB LEDs 606 includes a second group and includes a pair of red LEDs 606R-2-1, 606R-2-2 configured to emit, for example, respective wavelengths 502R-1, 502R-2, a pair of green LEDs 606G-2-1, 606G-2-2 configured to emit, for example, respective wavelengths 502G-1, 502G-2, and a pair of blue LEDs 606B-2-1, 606B-2-2 configured to emit, for example, respective wavelengths 502B-1, 502B-2.

[0117] Similarly, the group of RGB LEDs 606 includes a third group and includes a pair of red LEDs 606R-3-1, 606R-3-2 configured to emit, for example, respective wavelengths 502R-1, 502R-2, a pair of green LEDs 606G-3-1, 606G-3-2 configured to emit, for example, respective wavelengths 502G-1, 502G-2, and a pair of blue LEDs 606B-3-1, 606B-3-2 configured to emit, for example, respective wavelengths 502B-1, 502B-2.

[0118] Similarly, the group of RGB LEDs 606 includes a fourth group, e.g., comprising a set of red LEDs 606R-4-1, 606R-4-2 configured to emit respective wavelengths 502R-1, 502R-2, a pair of green LEDs 606G-4-1, 606G-4-2 configured to emit respective wavelengths 502G-1, 502G-2, and a pair of blue LEDs 606B-4-1, 606B-4-2 configured to emit respective wavelengths 502B-1, 502B-2.

[0119] The LED package 1104 may or may not include an IC 608. If the LED package 1104 does not include an IC 608, the LED package 1104 includes one of the circuits 800, 900 and is adapted to control the 24 RGB LEDs 606 and IR LEDs 607 of the LED package 1104, with the contacts on the rear side of the LED package 1104 appropriately positioned relative to the contacts in FIG. 7. In particular, the IC 608 may be adapted to include at least as many outputs as there are LEDs 606, 607.

[0120] When the LED package 1104 includes the IC 608, the LED package 1104 does not include the circuits 800, 900, and the IC 608 is adapted to control the 24 RGB LEDs 606 and the IR LEDs 607 using any suitable data addressing scheme.

[0121] Like LED package 1004, LED package 1104 can be operated in at least three modes: the aforementioned extended color gamut mode, the aforementioned 3D mode, and the aforementioned IR mode, and may be used in any combination with one or more of the extended color gamut mode and the 3D mode.

[0122] Accordingly, provided herein are devices and / or LED displays including various types of LED packages for use in cinema environments, simulated environments, and / or other suitable environments.

[0123] Examples of the term "configured" include "a computing device configured with," "a processor configured with," "a controller configured with," and similar expressions, which are understood to refer to computer functionality including program instructions recorded on a computer-readable storage medium. These program instructions, when executed by the computing device and / or processor and / or controller, cause the computing device and / or processor and / or controller to perform a series of operations that implement the functionality for which the computing device and / or processor and / or controller is configured. Therefore, the term "configured with" should not be unduly limited to a means-plus-function interpretation, but should be understood to include similar interpretations.

[0124] Furthermore, references to one processor and / or controller and / or device and / or engine, and the like, configured to perform a particular function are understood to include, but are not limited to, multiple processors and / or multiple controllers and / or multiple devices and / or multiple engines, and the like, performing such function.

[0125] For purposes of this specification, it should be understood that the phrases "at least one of X, Y, and Z" and "one or more of X, Y, and Z" may be interpreted as X only, Y only, Z only, or any combination of two or more items X, Y, and Z (e.g., XYZ, XY, YZ, XZ, etc.). Similar logic applies to two or more items where phrases such as "at least one..." or "one or more..." are used.

[0126] Terms such as "about," "substantially," "essentially," and "approximately" are defined to mean "close," e.g., within the understanding of a person skilled in the art. In some instances, these terms are interpreted as "within 10%," in other instances as "within 5%," in yet other instances as "within 1%," and in yet other instances as "within 0.5%."

[0127] Those skilled in the art will recognize that many more alternatives and modifications are possible, and that the above-described embodiment is merely illustrative of one or more embodiments, the scope of which is therefore limited only by the claims appended hereto.

Claims

1. A circuit board; a plurality of light emitting diode (LED) packages disposed on the circuit board; The LED package includes: a pair of red LEDs disposed adjacent to one another, each configured to emit red light at a different red wavelength; a pair of green LEDs disposed adjacent to one another, each configured to emit green light at a different green wavelength; a pair of blue LEDs disposed adjacent to each other, the pair of blue LEDs configured to emit blue light at different blue wavelengths; an integrated circuit (IC) configured to independently control the pair of red LEDs, the pair of green LEDs, and the pair of blue LEDs; an electrical connector connected to an integrated circuit of each of the plurality of LED packages, the electrical connector configured to communicate with an image providing device.

2. The device of claim 1 , wherein the circuit board further comprises perforations that allow sound to travel through the circuit board.

3. 10. The apparatus of claim 1, wherein the circuit board further comprises perforations that allow sound to travel through the circuit board, the perforations being present between adjacent LED packages except in the area of ​​the electrical connector.

4. 10. The apparatus of claim 1, wherein the respective different red wavelengths, the respective different green wavelengths, and the respective different blue wavelengths are selected to satisfy an ITU-R (International Telecommunication Union-Radiocommunication Sector) Recommendation BT.2020 (Broadcast Television) color space.

5. 2. The device of claim 1, wherein the respective different red wavelengths, the respective different green wavelengths, and the respective different blue wavelengths are selected to be at least 20 nm apart.

6. 10. The apparatus of claim 1, wherein the ICs of the plurality of LED packages are addressable such that the plurality of LED packages are arranged in an active matrix.

7. a pair of red LEDs positioned adjacent to one another and configured to emit red light at different red wavelengths; a pair of green LEDs positioned adjacent to one another and configured to emit green light at different green wavelengths; a pair of blue LEDs positioned adjacent to one another and configured to emit blue light at different blue wavelengths; an integrated circuit (IC) configured to independently control the pair of red LEDs, the pair of green LEDs, and the pair of blue LEDs.

8. 8. The LED package of claim 7, wherein the respective different red wavelengths, the respective different green wavelengths, and the respective different blue wavelengths are selected to satisfy ITU-R (International Telecommunication Union Radiocommunication Sector) Recommendation BT (Broadcast Television) 2020 color space.

9. 8. The LED package of claim 7, wherein the respective different red wavelengths, the respective different green wavelengths, and the respective different blue wavelengths are selected to be at least 20 nm apart.

10. 8. The LED package of claim 7, wherein the IC is addressable.

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