KR-102961191-B1 - LASER DIODE LIGHT SOURCES AND ELECTRONIC DEVICES COMPRISING THE SAME

Abstract

The present invention relates to a laser diode light source system and an electronic device equipped with the same. The present invention discloses a laser diode light source system comprising a temperature control element that emits multiple laser diode light sources of the same color at different operating temperatures. By means of the laser diode light source system and the electronic device equipped with the same according to the present invention, the bandwidth of light emitted from the laser diode can be expanded, thereby reducing speckle.

Inventors

• 권혁열
• 유재황

Assignees

• (주) 브라이튼코퍼레이션

Dates

Publication Date

20260507

Application Date

20231128

Claims (7)

1. Includes a red laser diode light source, a green laser diode light source and a blue laser diode light source, At least one color laser diode light source selected from a red laser diode light source, a green laser diode light source, and a blue laser diode light source is configured to include a plurality of laser diodes that output the same color, and A laser diode light source system characterized in that a plurality of laser diodes emitting the same color are each equipped with a temperature control element, and the temperature control elements operate at different temperatures.
2. In paragraph 1, A laser diode light source system characterized in that at least one selected color laser diode light source is a red laser diode light source.
3. In paragraph 2, The above red laser diode light source A first red laser diode light source including a first red laser diode having a first temperature control element and A second red laser diode light source comprising a second red laser diode having a second temperature control element A laser diode light source system characterized by including
4. In paragraph 3, The first temperature control element is The first heatsink and, The first TEC (ThermoElectric Cooler) attached to the lower part of the first heat sink It is composed of, including, The second temperature control element is The third heatsink and, 2nd TEC (ThermoElectric Cooler) attached to the bottom of the 3rd heatsink A laser diode light source system characterized by being composed including
5. In paragraph 4, A second heat sink attached to the lower part of the first TEC, and A first fan attached to the lower part of the second heatsink, and A fourth heat sink attached to the lower part of the second TEC, and A laser diode light source system characterized by further including a second fan attached to the lower part of the fourth heat sink.
6. Any one laser diode light source system selected from claims 1 to 5, and An electronic device comprising an image forming unit that receives a light source emitted from the above-mentioned laser diode light source system and outputs an image.
7. In paragraph 6, The above electronic device is characterized as being a structured light system or a projector.

Description

Laser diode light source systems and electronic devices comprising the same The present invention relates to a laser diode light source system and an electronic device equipped with the same, and more specifically, to a laser diode light source system equipped with a plurality of laser diode light sources that emit the same color while having different operating temperature characteristics, and an electronic device equipped with the same. To develop portable miniature projectors smaller than the palm of your hand or to commercialize projectors small enough to be embedded in devices like laptops, it is necessary to develop projectors that are small in size and low in power consumption. To achieve both small size and low power consumption, a light source that is compact and offers excellent performance relative to power consumption must be used. Laser light sources or electroluminescent diodes (LEDs) are the most suitable light sources for such low-power projectors. In addition to low-power projectors, laser light sources and LEDs are also widely used as structured lights for 3D scanner devices. LED and laser light sources are known as efficient sources that emit high-intensity light with low power consumption. However, both types of light sources have their own advantages and disadvantages. LED light sources are high-Étantou sources but have the disadvantage of lower luminous efficiency compared to lasers. In contrast, while laser light sources exhibit higher luminous efficiency than LEDs, they suffer from the disadvantage of a unique interference pattern called speckle. Therefore, if the speckle phenomenon of laser light can be reduced, there is no compact light source as suitable as a laser for structured lighting in micro-projectors or 3D scanners. However, laser light sources have the problem of requiring the minimization of an interference pattern called speckle, which makes them difficult to commercialize easily. Figure 1 is a graph showing the wavelength-dependent light intensity of red (R), green (G), and blue (B) multimode laser diodes. FIG. 2 is a configuration diagram of a laser diode light source system according to one embodiment of the present invention. FIG. 3 is a configuration diagram of a projector including a laser diode light source system according to one embodiment of the present invention. FIG. 4 is a graph showing the wavelength-dependent light intensity of red (R), green (G), and blue (B) multimode laser diodes measured in a laser diode light source system with the bandwidth of the red laser diode extended according to the embodiment presented in FIG. 3. The terms used in this specification are used merely to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as “comprising” or “having” are intended to indicate the presence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. In addition, in this specification, "on or above" means being located above or below the target part, but this does not necessarily mean being located on the upper side with respect to the direction of gravity. That is, the term "on or above" as used in this specification includes not only cases where it is located above or below the target part, but also cases where it is located in front or behind the target part. Furthermore, when it is stated that a part, such as a region or plate, is "on or above" another part, this includes not only cases where it is in contact with or spaced apart from "immediately on or above" another part, but also cases where there is another part in between. In addition, when a component is described in this specification as being "connected" or "connected" to another component, it should be understood that the component may be directly connected to or directly connected to the other component, but unless otherwise specifically stated, it may also be connected or connected through another component in between. Additionally, in this specification, terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. Laser light sources are generally commercially available in the form of semiconductor chips called laser diodes. Laser diodes are utilized in various fields by leveraging characteristics such as directional propagation, small emission spot size, monochromaticity, high light density, and coherence. For example, they are used in LiDAR for autonomous vehicles, laser therapy in the medical field, optical communication in telecommunications,