TWI548927B - Glass fluorescent color wheel with an anti-relective coating layer - Google Patents

Description

Glass phosphor color wheel with anti-reflective coating

The present invention relates to a glass phosphor color wheel, and more particularly to a color wheel applied to an optical system of a projector.

One of the features of the projector is that it can break the size limit of the general screen and easily project a large-size image. Therefore, it is widely used in various fields, such as a large-scale conference presentation with a projection system to magnify a projection object, or applied to a commercial On the projection screen or TV, the application range continues to expand.

One of the factors that consumers generally consider when purchasing a projector is the brightness of the projector. If the brightness of the projector is too high, the user may feel glare. This part of the user can use the environment. The brightness is adjusted to be higher; however, if the brightness of the projector is too low, the user cannot use it in a brighter environment. In addition, the brightness of the projector's bulb will continue to decay with use, and gradually get a sharp image; in addition, the brightness of the projector on the screen is often the highest in the middle, the more the brightness is decreasing toward the side. Therefore, for the user, the brightness of the projector must have a certain basic value.

However, the color wheel of the conventional projector uses a polymer colloid such as silicone rubber, and is mixed with fluorescent powder to form a fluorescent glue, wherein the heat of the polymer colloid Poor stability, as the power of the excitation light source increases, it will cause deterioration of the fluorescent glue. For example, the silicone rubber can only withstand a temperature of about 150 ° C, and the brightness of about 2000 lumens. When the temperature is higher than 150 ° C, the silicone will age. The yellowing causes the structure of the color wheel to be damaged, so that the luminous efficiency of the white light source module is lowered, and the color drift is easily generated, so it cannot be applied to an optical system with high temperature or high brightness.

In addition, when the light source of the projector passes through the color wheel, the amount of light emitted is more or less partially dissipated due to refraction or reflection. As shown in Fig. 1, when the incident light L1 enters the color wheel 10, a portion is generated. When the light L2 in the color wheel 10 hits the excellent wheel 10 and becomes the outgoing light L3, some of the light is deflected and reflected again. Therefore, only about 90% of the light remains. Passing smoothly, the brightness of the projector will be lower than expected.

In view of this, the inventors have conceived and further studied, and finally invented a glass phosphor color wheel having an anti-reflection coating layer.

The invention provides a glass phosphor color wheel with an anti-reflection coating layer, the main purpose of which is that the glass phosphor color wheel with the anti-reflection coating layer can be applied to the projector, thereby increasing the brightness of the projector.

To achieve the foregoing objective, the present invention provides a glass phosphor color wheel having an anti-reflection coating layer, comprising: a glass phosphor color wheel comprising a glass material and a combination of phosphor powder, the glass firefly The two sides of the light body color wheel are respectively an incident surface portion and a bottom surface portion; a first coating layer, the first coating layer is bonded to the incident surface portion, and the thickness of the first coating layer is four quarters An odd multiple of a wavelength of light, the first coating layer includes an AR coating; and a second coating layer bonded to the bottom surface portion.

The invention utilizes the provided glass phosphor color wheel with anti-reflection coating layer, and the obtained effect is that the glass phosphor made by combining glass material and phosphor powder can withstand high temperature and high temperature. Brightness, whereby the projector using the glass phosphor as a color wheel can adopt an optical system with higher temperature or higher brightness; on the other hand, by directly or indirectly on the glass phosphor color wheel There is an anti-reflection film (AR Coating) to increase the amount of light entering and output of the glass phosphor color wheel.

The present invention has been described in connection with the preferred embodiments of the present invention in accordance with the accompanying drawings.

[study]

10‧‧‧Color wheel

L1‧‧‧ incident light

L2‧‧‧Light

L3‧‧‧Out of light

〔this invention〕

20‧‧‧Glass Fluorescent Color Wheel

20B‧‧‧Glass Fluorescent Color Wheel

21‧‧‧glass materials

22‧‧‧Fluorescent powder

23‧‧‧Injected face

24‧‧‧ bottom part

31‧‧‧First coating

31B‧‧‧ a coating

32‧‧‧Second coating

32B‧‧‧Second coating

R1‧‧‧ incident light

R2‧‧‧Light

R3‧‧‧Out of the light

Figure 1 is a schematic diagram of a light source of a projector passing through a conventional color wheel.

Figure 2 is a schematic view of an embodiment of the invention.

Figure 3 is a schematic view of a light source of the projector through an embodiment of the present invention.

Figure 4 is a schematic view of another embodiment of the present invention.

Figure 5 is a partial enlarged view of a light source through an embodiment of the present invention.

Figure 6 is a partially enlarged view of a light source through another embodiment of the present invention.

Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.

In order to enable the reviewing committee to have a better understanding and understanding of the purpose, features and effects of the present invention, please refer to the following [detailed description of the drawings] as follows: The glass phosphor color of the anti-reflective coating layer of the present invention A preferred embodiment of the wheel, as shown in FIG. 2, includes: a glass phosphor color wheel 20, a first coating layer 31, and a second coating layer 32, wherein: the glass phosphor color wheel 20 is The glass material 21 and the phosphor powder 22 are directly welded, sintered or laminated. The two sides of the glass phosphor color wheel 20 are an incident surface portion 23 and a bottom surface portion 24; the first coating film Layer 31, the first coating layer 31 is bonded to the incident surface portion 23, the first coating layer 31 has an thickness of an odd multiple of a quarter of the wavelength of the light, and the first coating layer 31 includes an anti-reflection film (AR). a coating and a Narrow bandpass, wherein the refractive index of the first coating layer 31 is n, the refractive index of the glass phosphor color wheel is ns, and the refractive index of the ambient air is n0, wherein n2 =n0*ns; the second coating layer 32, the second coating layer 32 is bonded to the bottom surface 24, the second coating layer 32 is a notch filter (Notch filter).

The above description is the main components of the embodiment of the present invention and their configuration description. For the manner of use and function of the embodiment of the present invention, please refer to FIG. 2, FIG. 3 and FIG. 5, the present invention utilizes the glass material 21 and the phosphor powder 22 knot. The glass phosphor wheel 20 is formed to withstand high temperatures and high brightness, whereby the projector using the glass phosphor wheel 20 can employ an optical system of higher temperature or higher brightness.

In addition, the conventional polymer colloid cannot be formed by vapor deposition or sputtering, and the optical efficiency cannot be more effectively utilized. On the other hand, the incident surface portion 23 and the bottom surface portion 24 of the glass phosphor color wheel 20 of the present invention can be combined with the first plating layer 31 and the second plating layer 32, respectively, to increase the amount of light entering the glass phosphor color wheel 20 and The amount of light emitted. An anti-reflection film (AR Coating) is directly or indirectly provided on the glass phosphor color wheel 20 to increase the amount of light incident and the amount of light emitted from the glass phosphor color wheel. The processing method includes processing on the glass phosphor color wheel 20 by photonic crystal, nanoimprint, semiconductor technology coating, laser lithography etching, and the like. The first plating layer 31 and the second plating layer 32 may be one of a single layer film, a double layer film or a multilayer film. Thereby, when the incident light R1 enters the glass phosphor color wheel 20, the deflection and reflection of the light are avoided, and the light R2 in the glass phosphor color wheel 20 emits the glass phosphor color wheel 20 to become the outgoing light. At R3, light deflection and reflection are also avoided. Therefore, the light throughput can be increased to 98% of the incident light R1, effectively increasing the brightness of the projector.

In addition, please refer to FIG. 4 and FIG. 6 , which is another embodiment of the present invention. The coating on the glass phosphor color wheel 20B may also be reflective. Therefore, this embodiment The first plating layer 31B is an anti-reflection film (AR Coating), and the second plating layer 32B is a high reflection film (HR). Coating). Thereby, when the incident light R1 enters the glass phosphor color wheel 20B, the deflection and reflection of the light are avoided, and when the light R2 in the glass phosphor color wheel 20 is reflected by the second plating layer 32B, It is also possible to reduce the light deflection, and when the light R2 emits the glass phosphor color wheel 20B to become the outgoing light R3, the light deflection and reflection are also avoided, and therefore, the optical performance is also improved.

From the above, it is known that the present invention truly conforms to "industrial availability," "novelty," and "progressiveness", and submits an invention patent application in accordance with the law, praying for review and early granting of a patent, and it is truly sensible.

20‧‧‧Glass Fluorescent Color Wheel

21‧‧‧glass materials

22‧‧‧Fluorescent powder

23‧‧‧Injected face

24‧‧‧ bottom part

31‧‧‧First coating

32‧‧‧Second coating

Claims (6)

A glass phosphor color wheel having an anti-reflection coating layer, comprising: a glass phosphor color wheel, which is formed by direct sintering of a glass material and a phosphor powder, and the phosphor powder is uniformly distributed on the glass In the material, the two sides of the glass phosphor color wheel are an incident surface portion and a bottom surface portion respectively; a first coating layer, the first coating layer is bonded to the incident surface portion, and the thickness of the first coating layer is An odd multiple of a quarter of the wavelength of the light, the first coating layer comprising an AR coating; and a second coating layer bonded to the bottom portion. The glass phosphor color wheel having an anti-reflection coating layer according to claim 1, wherein the refractive index of the first coating layer is n, the refractive index of the glass phosphor color wheel is n _s , air The refractive index is n ₀ , where n ² = n ₀ * n _s . The glass phosphor color wheel having an anti-reflection coating layer according to claim 1, wherein the first coating layer further comprises a narrow wave filter, and the second coating layer is a notch wave. Filter (Notch filter). The glass phosphor color wheel having an anti-reflection coating layer according to claim 1, wherein the second plating layer is a high reflection film (HR Coating). The glass phosphor color wheel having an antireflection coating layer according to claim 1, wherein the first plating layer is one of a single layer film, a double layer film or a multilayer film. The glass phosphor color wheel having an antireflection coating layer according to claim 1, wherein the second plating layer is one of a single layer film, a double layer film or a multilayer film.