Light-emitting device and projection system and stage lighting system thereof

Abstract

The invention discloses a light-emitting device and a projection system and stage lighting system thereof. The light-emitting device comprises: an excitation light source which is used to generate exciting light; a wavelength conversion device which comprises a wavelength conversion layer, wherein the wavelength conversion layer converts at least part of the exciting light to an excited light; a light-splitting device which comprises at least two sections, wherein emergent light from the wavelength conversion device at least emerges two colors by the two sections; a first driving device which is used to drive the wavelength conversion device, wherein light spots generated by the exciting light emitting on the wavelength conversion layer act on the light conversion layer along a desired trajectory with the first driving device,; a second driving device which is used to drive the light-splitting device, wherein different sections of the light-splitting device periodically locate on a light path of the emergent light of the wavelength conversion device with the second driving device, and movement velocity of the wavelength conversion device is n times the movement velocity of the light-splitting device, n is bigger than or equals to 1.1 or n equals to 1 divided by m, and is bigger than or equals to (L+1) / 1.1 and is smaller than or equals to L / 0.9, wherein m is bigger than 1, and L is an integer which is bigger than or equals to 1, and is smaller than or equals to 4. The light-emitting device provided in the invention enables brightness change or color change of the emitting light of the light-splitting device not to be perceived by human eyes.

Description

technical field [0001] The invention relates to the technical field of illumination and display, in particular to a light emitting device, a projection system and a stage light system. Background technique [0002] UHP (Ultra High Power) light source is a high-performance light source developed by Philips Lighting in the early 1990s. The launch of UHP light source has brought a revolutionary breakthrough for projection light sources. UHP light sources are now widely used in various fields such as front projectors, rear projection TVs, and video walls. [0003] However, the UHP light source is limited by its light-emitting mechanism, and its brightness cannot be very high, so it cannot meet some occasions that require high brightness, such as commercial projectors, stage lighting systems, etc. In addition, the UHP light source is also expensive and contains Highly polluted mercury cannot achieve instant startup and shutdown. Therefore, as the requirements for light source sy...

AI Technical Summary

Problems solved by technology

However, due to the deviation of the drive control itself, and the rotational angular velocity of the drive device cannot be kept absolutely stable, the rotation cycle of the first drive device and the rotation cycle of the second drive device cannot be completely synchronized, but there are often fluctuations. small difference

On the other hand, the current phosphor layer molding technology is not perfect, and the phosphor layer after molding often has problems such as uneven thickness, uneven concentration, or unevenness on the surface, which makes different positions of the phosphor layer excited. The intensity of light varies

Therefore, when there is a slight difference between the rotation period of the fluorescent color wheel and the rotation period of the spectroscopic color wheel, the rotation of the fluorescent pink wheel and the rotation of the spectroscopic color wheel will produce a beat frequency phenomenon, and the frequency of the beat frequency phenomenon is very low. The brightness change frequency of the outgoing light of the spectroscopic device is relatively low, so that the human eye can easily perceive the flickering phenomenon of the outgoing light

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