Variable-focus light emitting device

Abstract

The invention provides a variable-focus light emitting device which comprises a light source module and a focus varying module. The light source module comprises a plurality of semiconductor light emitting units. The focus varying module is disposed on one side of the light source module and comprises a circuit board and a plurality of liquid lenses disposed on the circuit board. The liquid lenses comprise first liquid and second liquid. A liquid interface is disposed between the first liquid and the second liquid. The liquid lenses correspond to the light emitting units. Different curvature of the liquid interface is generated by the liquid lenses according to different voltage applied by the circuit board. Light emitted by the light emitting units irradiates into corresponding liquid lenses, and angles of the light emitting from the liquid lenses changes according to the curvature of the liquid interface. By the variable-focus light emitting device, lighting range and light angles can be changed, and size miniaturization and thinning of the overall device are facilitated.

Description

technical field [0001] The invention relates to a light emitting device, in particular to a variable focus light emitting device. Background technique [0002] Lighting devices are very common in daily life, especially lighting devices that can change the lighting range, such as stage lights, display lights, car lights, warning lights or fish collection lights and so on. Generally, the way to change the illumination range is usually to achieve optical zoom by combining multiple lenses. By adjusting the relative position between the lens groups, different illumination ranges are produced. However, this method of using lens groups for optical zoom requires more The large accommodation space allows the mechanism components and the lens group to move with each other, and it is not easy to achieve miniaturization or thinning design. In addition, since the structural elements and lens groups are configured on the light-emitting device, usually the illumination range of the light-...

AI Technical Summary

Problems solved by technology

Generally, the way to change the illumination range is usually to achieve optical zoom by combining multiple lenses. By adjusting the relative position between the lens groups, different illumination ranges are produced. However, this method of using lens groups for optical zoom requires more Large accommodation space for the mutual movement of mechanism components and lens groups, making it difficult to achieve miniaturization or thinning design

In addition, since the structural elements and lens groups are configured on the light-emitting device, usually the illumination range of the light-emitting surface of the light-emitting device can only be changed by optical zoom, and it is difficult to adjust the angle of the lighting direction according to the user's needs. Demanding lighting devices, such as active turn lights, require more rotatable mechanism components, controllers and motors, and use motors to drive rotatable mechanism components to rotate the lens group to change the angle. These additional components make the entire lighting device Larger accommodation space is required, so it is not easy to achieve miniaturization or thinning of optical devices that can change the illumination range and illumination angle at the same time

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