Wavelength conversion apparatus, light source system and display device

Patent metadata

Field	Value
Publication number	US-12038679-B2
Application number	US-202017428957-A
Country	US
Kind code	B2
Filing date	Mar 18, 2020
Priority date	Apr 15, 2019
Publication date	Jul 16, 2024
Grant date	Jul 16, 2024

Abstract

Provided are a wavelength conversion apparatus, a light source system including the same, and a display device including the light source system. The wavelength conversion apparatus includes an angle deflection region and a wavelength conversion region for converting incident second light into excited light and then emitting same. The angle deflection region includes deflection units, each of which includes a light emergent face for emitting first light. A first included angle is formed between the light emergent face and a reference plane. First included angles between light emergent faces of at least two deflection units and the reference plane are not equal. The deflection units are located on a light path of the first light in a time sequence, so as to change an emergent angle of the first light in the time sequence, such that the first light is successively scanned at a preset position to form virtual pixels.

First claim

The invention claimed is:

1. A wavelength conversion apparatus, comprising:
an angle deflection region configured to receive a first light from a first light source to achieve angle deflection of the first light, wherein the angle deflection region comprises a plurality of deflection units, wherein each of the plurality of deflection units comprises a light-emitting surface for emitting the first light, wherein a first included angle is formed between the light-emitting surface and a reference plane, and first included angles formed between the reference plane and light-emitting surfaces of at least two of the plurality of deflection units are not equal to each other, and wherein the plurality of deflection units are located on an optical path of the first light in time sequence in order to change an emergent angle of the first light in time sequence in such a manner that the first light is successively scanned at a preset position to form a plurality of virtual pixels; and
a wavelength conversion region configured to receive a second light from a second light source, convert the second light incident thereto into an excited light and emit the excited light to achieve wavelength conversion of the second light.

2. The wavelength conversion apparatus according to claim 1 , wherein the reference plane is a horizontal plane or a plane in which the wavelength conversion region resides.

3. The wavelength conversion apparatus according to claim 1 , wherein the wavelength conversion region comprises at least one fluorescent region, which is sequentially located on an optical path of the second light and is excited to generate the excited light during one image frame, and wherein the first light emitted from at least one of the plurality of deflection units is projected onto the preset position to form one of the plurality of virtual pixels.

4. The wavelength conversion apparatus according to claim 1 , wherein the wavelength conversion apparatus is a color wheel and further comprises a driving unit configured to drive the wavelength conversion apparatus to move in time sequence.

5. The wavelength conversion apparatus according to claim 4 , wherein the light-emitting surfaces of the angle deflection region are inclined toward a rotation axis of the wavelength conversion apparatus.

6. The wavelength conversion apparatus according to claim 2 , wherein the wavelength conversion region comprises at least one fluorescent region, which is sequentially located on an optical path of the second light and is excited to generate the excited light during one image frame, and wherein the first light emitted from at least one of the plurality of deflection units is projected onto the preset position to form one of the plurality of virtual pixels.

7. The wavelength conversion apparatus according to claim 2 , wherein the wavelength conversion apparatus is a color wheel and further comprises a driving unit configured to drive the wavelength conversion apparatus to move in time sequence.

8. A light source system, comprising:
a first light source configured to emit laser light as a first light;
a second light source configured to emit a second light; and
a wavelength conversion apparatus, wherein the wavelength conversion apparatus comprises an angle deflection region and a wavelength conversion region, wherein the angle deflection region is configured to receive the first light from the first light source to achieve angle deflection of the first light, wherein the angle deflection region comprises a plurality of deflection units, wherein each of the plurality of deflection units comprises a light-emitting surface for emitting the first light, wherein a first included angle is formed between the light-emitting surface and a reference plane, and first included angles formed between the reference plane and light-emitting surfaces of at least two of the plurality of deflection units are not equal to each other, and wherein the plurality of deflection units are located on an optical path of the first light in time sequence in order to change an emergent angle of the first light in time sequence in such a manner that the first light is successively scanned at a preset position to form a plurality of virtual pixels; and the wavelength conversion region is configured to receive the second light from the second light source, convert the second light incident thereto into an excited light, and emit the excited light to achieve wavelength conversion of the second light.

9. The light source system according to claim 8 , further comprising:
a power control device configured to adjust a driving current of the first light source based on original image data.

10. The light source system according to claim 8 , wherein the reference plane is a horizontal plane or a plane in which the wavelength conversion region resides.

11. The light source system according to claim 8 , wherein the wavelength conversion region comprises at least one fluorescent region, which is sequentially located on an optical path of the second light and is excited to generate the excited light during one image frame, and wherein the first light emitted from at least one of the plurality of deflection units is projected onto the preset position to form one of the plurality of virtual pixels.

12. The light source system according to claim 8 , wherein the wavelength conversion apparatus is a color wheel and further comprises a driving unit configured to drive the wavelength conversion apparatus to move in time sequence.

13. The light source system according to claim 12 , wherein the light-emitting surfaces of the angle deflection region are inclined toward a rotation axis of the wavelength conversion apparatus.

14. A display device, configured to emit image light to a projection imaging plane based on original image data of each frame of images to be displayed to form a display image, the images to be displayed comprising a plurality of pixel units, and the display device comprising:
a control device configured to transmit a light modulation signal based on the images to be displayed;
a light source system, wherein the light source system comprises a wavelength conversion apparatus, a first light source, and a second light source, wherein the first light source is configured to emit laser light as a first light, and the second light source is configured to emit a second light, and wherein the wavelength conversion apparatus comprises an angle deflection region and a wavelength conversion region, wherein the angle deflection region is configured to receive the first light from the first light source to achieve angle deflection of the first light, wherein the angle deflection region comprises a plurality of deflection units, wherein each of the plurality of deflection units comprises a light-emitting surface for emitting the first light, wherein a first included angle is formed between the light-emitting surface and a reference plane, and first included angles formed between the reference plane and light-emitting surfaces of at least two of the plurality of deflection units are not equal to each other, and wherein the plurality of deflection units are located on an optical path of the first light in time sequence in order to change an emergent angle of the first light in time sequence in such a manner that the first light is successively scanned at a preset position to form a plurality of virtual pixels; and the wavelength conversion region is configured to receive the second light from the second light source, convert the second light incident thereto into an excited light, and emit the excited light to achieve wavelength conver

Assignees

• Appotronics Corp Ltd

Inventors

• Hu Fei
• Yu Xin
• Li Shijie
• Li Yi

Classifications

• H04N9/3164

  using multiple light sources · CPC title

• H04N9/3161

  using laser light sources (using laser beams scanning the display screen H04N9/3129) · CPC title

• H04N9/3155

  for controlling the light source (light source control per se H05B35/00 – H05B47/00; control of an illumination source for displays in general G09G3/3406) · CPC title

• H04N9/3111

  for displaying the colours sequentially, e.g. by using sequentially activated light sources (sequential projection in colour photography G03B33/08) · CPC title

• G03B21/006

  using LCD's · CPC title