Light-emitting module and front-light type silicon-based liquid crystal module

Abstract

The invention provides a light-emitting module and a front-light type silicon-based liquid crystal module. The light-emitting module comprises a substrate, a plurality of light-emitting elements, a window plate and an encapsulation body, the light-emitting element is disposed on the substrate and has a plurality of light colors. The window plate is arranged on the light-emitting surface of the light-emitting element. The encapsulation body surrounds the light-emitting element and surrounds the window plate.

Description

Technical Field

[0001] The present invention relates to an optical module, and in particular to a light emitting module and a front-lit LCOS module. Background Art

[0002] As display technology advances, a light valve is created to convert an illumination beam of a light source into an image beam. A projection lens is disposed on the path of the image beam and is configured to project the image onto a screen to form an image on the screen. Thus, a user can see the image on the screen. Generally speaking, light valves are classified into LCOS panels and digital micro-mirror devices (DMDs).

[0003] Some conventional LCOS panels have color filters so that the LCOS panel can provide color images. For example, the color filter divides the pixel into a red sub-pixel, a green sub-pixel, and a blue sub-pixel. However, the sub-pixels reduce the resolution of the LCOS panel. If the LCOS has pixels that are not divided into sub-pixels of different colors, the LCOS can have a higher resolution, but the LCOS requires a colored light source to illuminate the LCOS. However, in conventional LCOS modules, there is no colored light source that provides illumination with sufficient power. Summary of the invention

[0004] The present invention is directed to a light emitting module capable of providing colored lighting with sufficient power.

[0005] The present invention is directed to a front-light LCOS module capable of providing a color image light beam of sufficient intensity.

[0006] An embodiment of the present invention provides a light-emitting module including a substrate, a plurality of light-emitting elements, a window plate, and an encapsulation body. The light-emitting elements are disposed on the substrate and have a plurality of light colors. The window plate is disposed on the light-emitting surface of the light-emitting elements. The encapsulation body surrounds the light-emitting elements and surrounds the window plate.

[0007] An embodiment of the present invention provides a front-light liquid crystal on silicon (LCOS) module comprising the above-mentioned light-emitting module, a first polarizer, a waveguide, an LCOS panel and a second polarizer. Light emitted by the light-emitting element passes through a window plate to form an illumination beam. The first polarizer is disposed on the path of the illumination beam and is configured to polarize the illumination beam. The waveguide has a first surface, a second surface opposite to the first surface, and a light incident surface connecting the first surface and the second surface, wherein the illumination beam from the first polarizer enters the waveguide through the light incident surface. The LCOS panel is disposed below the second surface and is configured to convert the illumination beam into a polarized image beam. The second polarizer is disposed on the first surface and is configured to allow the polarized image beam to pass through, wherein the polarized image beam from the LCOS panel passes through the second surface, the first surface and the second polarizer in sequence.

[0008] In the light-emitting module and the front-lit LCOS module according to the embodiment of the present invention, a plurality of light-emitting elements with a plurality of light colors are used to provide light of different colors, and a window plate is used to guide the light out, so that the light-emitting module according to the embodiment of the present invention can provide color lighting with sufficient power. Therefore, the front-lit LCOS module according to the embodiment of the present invention can provide a color image light beam with sufficient intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1A is a schematic top view of a light emitting module according to an embodiment of the present invention;

[0010] Figure 1B It is along Figure 1A A schematic cross-sectional view of the light emitting module along line II in FIG.

[0011] Figure 1C It is along Figure 1A A schematic cross-sectional view of the light emitting module along line II-II in FIG.

[0012] Figure 1D and Figure 1E are schematic cross-sectional views of light emitting modules according to two other embodiments of the present invention;

[0013] Figure 2 yes Figure 1A A schematic top view of a substrate and a light-emitting element of a light-emitting module;

[0014] Figure 3A is a schematic top view of a light emitting module according to another embodiment of the present invention;

[0015] Figure 3B It is along Figure 3A A schematic cross-sectional view of the light emitting module along line III-III in FIG.

[0016] Figure 3C It is along Figure 3AA schematic cross-sectional view of a light emitting module along line IV-IV in FIG.

[0017] 4A to 4D is a schematic top view of a substrate and a light-emitting element of a light-emitting module according to another embodiment of the present invention;

[0018] FIG. 5A to FIG. 5E is a schematic top view of a substrate and a light-emitting element of a light-emitting module according to another embodiment of the present invention;

[0019] FIG. 6A to FIG. 6C is a schematic top view of a substrate and a light-emitting element of a light-emitting module according to another embodiment of the present invention;

[0020] Figure 7 is a schematic cross-sectional view of a front-light LCOS module according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals are used in the drawings and the description to refer to the same or like parts.

[0022] Figure 1A is a schematic top view of a light emitting module according to an embodiment of the present invention, Figure 1B It is along Figure 1A A schematic cross-sectional view of the light emitting module along line II in FIG. Figure 1C It is along Figure 1A Schematic cross-sectional view of the light emitting module along line II-II in FIG. Figure 2 yes Figure 1A A schematic top view of a substrate and a light-emitting element of a light-emitting module in FIG. Figures 1A to 1C as well as Figure 2 The light emitting module 100 in this embodiment includes a substrate 110, a plurality of light emitting elements 120, a window plate 130 and an encapsulation body 140. The light emitting element 120 is disposed on the substrate 110 and has a plurality of light colors. In this embodiment, the light emitting element 120 includes at least one first color light emitting diode 120a ( Figure 1A In the figure, a plurality of first color light emitting diodes 120a and at least one second color light emitting diode 120b are shown as examples. Figure 1A exemplarily shown in FIG. 1 , a plurality of second color light emitting diodes 120b), and at least one third color light emitting diode 120c (in FIG. Figure 1A A plurality of third color light emitting diodes 120c) are shown as an example in FIG.

[0023] In this embodiment, one of the first color LED 120a, the second color LED 120b and the third color LED 120c is a red LED, another of the first color LED 120a, the second color LED 120b and the third color LED 120c is a green LED, and the remaining one of the first color LED 120a, the second color LED 120b and the third color LED 120c is a blue LED.

[0024] The window plate 130 is disposed on the light emitting surface 121 of the light emitting element 120. The encapsulation body 140 surrounds the light emitting element 120 and surrounds the window plate 130. In this embodiment, the window plate 130 is a transparent plate, and the light 123 emitted by the light emitting element 120 passes through the window plate 130 to form an illumination beam 125. In this embodiment, the top surface 132 of the window plate 130 facing away from the light emitting element 120 may be a flat surface. However, in other embodiments, the top surface 132a of the window plate 130 facing away from the light emitting element 120 may be a flat surface. Figure 1D The random scattering surface (eg, rough surface) shown, or the top surface 132b of the window plate 130 facing away from the light emitting element 120 may be as shown in FIG. Figure 1E A surface having micro lenses 133b arranged in an array is shown. In addition, the window plate 130 may be made of glass or a plastic material (eg, an acrylic plastic material).

[0025] In the light emitting module 100 of this embodiment of the present invention, a plurality of light emitting elements 120 with various light colors are used to provide light 123 of different colors, and a window plate 130 is used to guide the light 123 out, so that the light emitting module 100 of this embodiment can provide colored lighting with sufficient power.

[0026] In this embodiment, each of the light emitting elements 120 has a top electrode 122 beside its light emitting surface 121 and at the top side of the light emitting element 120 facing away from the substrate 110, and the window plate 130 exposes the top electrode 122. In this embodiment, each of the light emitting elements 120 also has a bottom electrode at the bottom side of the light emitting element 120 adjacent to the substrate 110. However, in other embodiments, each of the light emitting elements 120 may have two top electrodes at the top side of the light emitting element 120, or each of the light emitting elements 120 may have two bottom electrodes at the bottom side of the light emitting element 120. In this embodiment, the top electrode 122 is located at the corner of the light emitting surface 121, exposed by the window plate 130, and covered by the encapsulant 140. In this embodiment, the encapsulant 140 is, for example, a sealing glue. The color of the encapsulant 140 may be black, white, or any other suitable color. The encapsulant 140 may have a diffusive surface and act as a sealant to protect the LED and bonding wires of the LED.

[0027] In this embodiment, the light emitting elements 120 are symmetrically disposed on the substrate 110 with respect to a line of symmetry A1. In this embodiment, a side S1 of each of the light emitting elements 120 is not parallel to a side S2 of the substrate 110, and is not perpendicular to the side S2 of the substrate 110. In other words, the side S1 is inclined relative to the side S2.

[0028] Figure 3A is a schematic top view of a light emitting module according to another embodiment of the present invention, Figure 3B It is along Figure 3A A schematic cross-sectional view of the light emitting module along line III-III in FIG. Figure 3C It is along Figure 3A Schematic cross-sectional view of the light emitting module along line IV-IV in FIG. FIG. 3A to FIG. 3C The light emitting module 100d in this embodiment is similar to Figure 1A The light emitting module 100 in this embodiment and the light emitting module 100d in this embodiment Figure 1A The main differences between the light emitting modules 100 in the embodiment are as follows. In the light emitting module 100d in this embodiment, the side surface S3 of the window plate 130 is coated with a reflective film 150. For example, the window plate 130 may have four side surfaces S3 all coated with reflective films 150. The reflective film 150 can well reflect the light 123 emitted from the light emitting element 120 to the window plate 130 in an oblique direction, thereby further improving the power of the colored lighting provided by the light emitting module 100d. The reflective film 150 can prevent the light 123 from leaking to the encapsulation body 140 and help to mix the light 123 of different colors into a more uniform white light.

[0029] 4A to 4D is a schematic top view of a substrate and a light-emitting element of a light-emitting module according to another embodiment of the present invention. 4A to 4D , 4A to 4D 1 and 2 show different arrangements of the light emitting elements 120 disposed on the substrate 110. 4A to 4D In the embodiment, the first color LED 120a, the second color LED 120b and the third color LED 120c may be arranged alternately in different ways. In an embodiment, the number of light emitting elements 120 on the substrate 110 may be 3 to 1000. The side length L1 of each of the light emitting elements 120 may be 1 micrometer to 1000 micrometers.

[0030] FIG. 5A to FIG. 5E is a schematic top view of a substrate and a light-emitting element of a light-emitting module according to another embodiment of the present invention. FIG. 5A to FIG. 5E In these embodiments, a side S1 of each of the light emitting elements 120 is parallel to or perpendicular to a side S2 of the substrate 110. In these embodiments, the first color LEDs 120a, the second color LEDs 120b, and the third color LEDs 120c may be alternately arranged in different ways.

[0031] FIG. 6A to FIG. 6C is a schematic top view of a substrate and a light-emitting element of a light-emitting module according to another embodiment of the present invention. Fig. 6A and Figure 6B In both embodiments, the area of ​​the light emitting surface 121 of the first color LED 120a is greater than the area of ​​the light emitting surface 121 of the second color LED 120b and greater than the area of ​​the light emitting surface 121 of the third color LED 120c. Figure 6C In the figure, the area of ​​the light emitting surface 121 of the first color LED 120a is equal to the area of ​​the light emitting surface 121 of the second color LED 120b and equal to the area of ​​the light emitting surface 121 of the third color LED 120c, and the light emitting elements 120 of the same color are arranged in the same row.

[0032] Figure 7 is a schematic cross-sectional view of a front-light LCOS module according to an embodiment of the present invention. Figure 7The front-light LCOS module 200 in this embodiment includes any one of the above-mentioned light-emitting modules in various embodiments (hereinafter, the light-emitting module 100 is taken as an example), a first polarizer 210, a waveguide 220, an LCOS panel 230, and a second polarizer 240. The first polarizer 210 is disposed on the path of the illumination beam 125 from the light-emitting module 100 and is configured to polarize the illumination beam 125. In an embodiment, the first polarizer 210 is a wire grid polarizer film. The waveguide 220 has a first surface 222, a second surface 224 opposite to the first surface 222, and a light incident surface 226 connecting the first surface 222 and the second surface 224, wherein the illumination beam 125 from the first polarizer 210 enters the waveguide 220 through the light incident surface 226. The LCOS panel 230 is disposed below the second surface 224 and is configured to convert the illumination beam 125 into a polarized image beam 231. The second polarizer 240 is disposed on the first surface 222 and is configured to allow the polarized image beam 231 to pass through, wherein the polarized image beam 231 from the LCOS panel 230 sequentially passes through the second surface 224, the first surface 222, and the second polarizer 240. In an embodiment, the illumination beam 125 polarized by the first polarizer 210 has a first polarization direction P1, the polarized image beam 231 has a second polarization direction P2, and the first polarization direction P1 is perpendicular to the second polarization direction P2. In addition, the second polarizer 240 allows light having the second polarization direction P2 (i.e., the polarized image beam 231) to pass through.

[0033] In this embodiment, the front-lit LCOS module 200 in this embodiment further includes a plurality of micromirrors 250, which are arranged at intervals along the first surface 222 and are configured to reflect the illumination light beam 125 to the LCOS panel 230. In this embodiment, the light-emitting elements 120 with different light colors are configured to sequentially emit light 123 of different colors. For example, the first color light, the second color light, and the third color light are sequentially emitted, so that the front-lit LCOS module 200 can be a color sequential front-lit LCOS module. In this embodiment, the front-lit LCOS module 200 can also include at least one coupling lens 260 (in Figure 7 Two coupling lenses 260 are exemplarily shown in FIG. 1 , wherein at least one coupling lens 260 is disposed between the light emitting module 100 and the first polarizer 210 and is configured to couple the illumination light beam 125 to the first polarizer 210 .

[0034] In this embodiment, since the light emitting module 100 can provide colored lighting with sufficient power, the front-light LCOS module 200 in this embodiment can provide a colored image light beam with sufficient intensity.

[0035] In summary, in the light-emitting module and the front-lit LCOS module according to the embodiment of the present invention, a plurality of light-emitting elements with a plurality of light colors are used to provide light of different colors, and a window plate is used to guide the light out, so that the light-emitting module according to the embodiment of the present invention can provide color lighting with sufficient power. Therefore, the front-lit LCOS module according to the embodiment of the present invention can provide a color image light beam with sufficient intensity.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A light emitting module, characterized in that: include: substrate; A plurality of light-emitting elements are disposed on the substrate and have a plurality of light colors; A window plate, disposed on the light emitting surfaces of the plurality of light emitting elements; as well as The encapsulation body surrounds the plurality of light emitting elements and surrounds the window plate.

2. The light emitting module according to claim 1, characterized in that: The plurality of light emitting elements include at least one first color light emitting diode, at least one second color light emitting diode, and at least one third color light emitting diode.

3. The light emitting module according to claim 2, characterized in that: The light emitting surface area of ​​the first color light emitting diode is larger than the light emitting surface area of ​​the second color light emitting diode and larger than the light emitting surface area of ​​the third color light emitting diode.

4. The light emitting module according to claim 2, characterized in that: One of the first color LED, the second color LED and the third color LED is a red LED, another of the first color LED, the second color LED and the third color LED is a green LED, and the remaining one of the first color LED, the second color LED and the third color LED is a blue LED.

5. The light emitting module according to claim 1, characterized in that: Each of the plurality of light emitting elements has a top electrode beside the light emitting surface thereof, and the window plate exposes the top electrode.

6. The light emitting module according to claim 1, characterized in that: The side surface of the window plate is coated with a reflective film.

7. The light emitting module according to claim 1, characterized in that: The plurality of light emitting elements are symmetrically arranged on the substrate with respect to a symmetry line.

8. The light emitting module according to claim 1, characterized in that: A side of each of the plurality of light emitting elements is not parallel to a side of the substrate and is not perpendicular to the side of the substrate.

9. The light emitting module according to claim 1, characterized in that: One side of each of the plurality of light emitting elements is parallel to or perpendicular to one side of the substrate.

10. A front-lit liquid crystal on silicon module, characterized in that: include: Lighting module, comprising: substrate; A plurality of light-emitting elements are disposed on the substrate and have a plurality of light colors; a window plate disposed on light emitting surfaces of the plurality of light emitting elements, wherein light emitted by the plurality of light emitting elements passes through the window plate to form an illumination light beam; and An encapsulation body, enclosing the plurality of light emitting elements and surrounding the window plate; a first polarizer disposed in a path of the illumination beam and configured to polarize the illumination beam; a waveguide having a first surface, a second surface opposite to the first surface, and a light incident surface connecting the first surface and the second surface, wherein the illumination light beam from the first polarizer enters the waveguide through the light incident surface; a liquid crystal on silicon panel disposed below the second surface and configured to convert the illumination beam into a polarized image beam; and A second polarizer is disposed on the first surface and configured to allow the polarized image light beam to pass through, wherein the polarized image light beam from the LCOS panel passes through the second surface, the first surface and the second polarizer in sequence.

11. The front-lit LCS module according to claim 10, characterized in that: The plurality of light emitting elements include at least one first color light emitting diode, at least one second color light emitting diode, and at least one third color light emitting diode.

12. The front-lit LCS module according to claim 11, characterized in that: The light emitting surface area of ​​the first color light emitting diode is larger than the light emitting surface area of ​​the second color light emitting diode and larger than the light emitting surface area of ​​the third color light emitting diode.

13. The front-lit LCS module according to claim 11, characterized in that: One of the first color LED, the second color LED and the third color LED is a red LED, another of the first color LED, the second color LED and the third color LED is a green LED, and the remaining one of the first color LED, the second color LED and the third color LED is a blue LED.

14. The front-lit LCS module according to claim 10, characterized in that: Each of the plurality of light emitting elements has a top electrode beside the light emitting surface thereof, and the window plate exposes the top electrode.

15. The front-lit LCS module according to claim 10, characterized in that: The side surface of the window plate is coated with a reflective film.

16. The front-lit LCS module according to claim 10, characterized in that: The plurality of light emitting elements are symmetrically arranged on the substrate with respect to a symmetry line.

17. The front-lit LCS module according to claim 10, characterized in that: A side of each of the plurality of light emitting elements is not parallel to a side of the substrate and is not perpendicular to the side of the substrate.

18. The front-lit LCS module according to claim 10, characterized in that: One side of each of the plurality of light emitting elements is parallel to or perpendicular to one side of the substrate.

19. The front-lit LCS module according to claim 10, characterized in that: Also included are a plurality of micromirrors disposed along the first surface and configured to reflect the illumination light beam to the liquid crystal on silicon panel.

20. The front-lit LCS module according to claim 10, characterized in that: The plurality of light emitting elements having different light colors are configured to sequentially emit light of different colors.

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