Knob light guide ring structure and light control method thereof

Abstract

The invention relates to a knob light guide ring structure and a light control method thereof. With a specific structure of upper and lower light guide parts, light is firstly directed to go into the lower guide part from a firstlight-entering surface, and then led out from a first light-exiting surface after undergoing multiple refraction and diffuse reflection by a structure of a first outer refraction and reflection surface and a first inner refraction and reflection surface; the light goes into the upper light guide part from a second light-entering surface, and then led out from a second light-exiting surface after undergoing multiple refraction and diffuse reflection by a structure of a second outer refraction and reflection surface and a second inner refraction and reflection surface in the upper light guide part; thus, a uniform final display effect may be achieved. The knob light guide ring structure in the invention allows uniform light guide by the outer ring gap of the knob based on a truncated cone-shapedknob light guide ring structure design with two vertical LED light sources in compact and limited structure space; thus, the number of the LED light sources may be reduced on the basis of satisfying the transmission of light and uniformity of the light guide ring, thereby saving the product costs.

Description

technical field [0001] The invention relates to the technical field of vehicle-mounted electronic products, in particular to a knob light guide ring structure and a light control method thereof. Background technique [0002] With the rapid development of vehicle electronic products, the requirements for products are gradually moving towards the development direction of intelligence and simplicity. Among them, the pursuit of aesthetic appearance is getting higher and higher. The effect of lighting display is also particularly important. Regarding the display effect of lighting, in addition to the variety of color matching, the requirements for the brightness consistency and uniformity of the overall lighting are also getting higher and higher, especially the background lights of car audio buttons, knobs and The decorative background light of the knob is in harmony with the interior of the vehicle. [0003] Knobs are important operating components on various control panels, a...

AI Technical Summary

Problems solved by technology

In the existing light guide structures of small-sized knobs (generally referring to diameters of 16-28mm), there are disadvantages of being limited to the internal structural space. Since the internal structural space of the knob is smaller, the structure of the light guide is more complicated, and the uniformity of light guide , The light guide efficiency is reduced. Normally, 3 or more vertical LED light sources are required to be evenly distributed to ensure that the light guide ring of the knob is evenly transmitted.

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