Light emitting device, light emitting control method and projection device

Abstract

The invention discloses a light emitting device, a light emitting control method and a projection device. The light emitting device comprises a main light source; the light emitting device emits three kinds of primary light through turning on a main light source, wherein a color gamut formed on a coordinate graph is a first color gamut; the light emitting device also comprises a compensation light source for emitting compensation light; the compensation light is used for compensating at least one kind of light in the three kinds of primary light; if color coordinators of all pixels of a projection image of a current frame are all in the first color gamut area, the main light source is controlled to be turned on to enable the light emitting device to emit three kinds of primary light and the compensation light source is controlled not to emit light; if pixels, the color coordinates of which are beyond the first color gamut, exist, the main light source is controlled to be turned on and the compensation light source is controlled to be turned on to make the light emitting device emit compensation light; when the color coordinates of all pixels are all in the first color gamut, the compensation light source is not turned on, and when some pixels are located beyond the first color gamut area, the first compensation light source is turned on, so that an energy saving effect is achieved.

Description

technical field [0001] The present invention relates to the field of projection technology, in particular to a light emitting device, a light emitting control method, and projection equipment. Background technique [0002] like figure 1 Shown is a schematic diagram of the color gamut results before and after the compensation light source is used by the projection device in the prior art, as shown in figure 2 Shown is a comparison diagram of the color gamut before and after the compensation light source is used for the projection device in the prior art, figure 2 is for illustrative purposes figure 1 And the schematic diagram made, figure 1 and figure 2 The compensation light used by the projection equipment is red laser. combine figure 1 and figure 2 It can be seen that in the prior art, when the red light among the three primary colors required by the projection device is fluorescent (for example, a color light generating device is used to generate the three prim...

AI Technical Summary

Problems solved by technology

[0003] However, in the prior art, if only red fluorescent light is used as the primary color light, then for a certain frame of image, the color of pixels whose color coordinates fall outside the GBR cannot be effectively displayed

[0004] Similarly, if only the red laser is used as the red primary color light, for a certain frame of image, the color of the pixels whose color coordinates fall outside GBR’ cannot be effectively displayed

[0005] In the case of using the mixed light of red fluorescent light and red laser light as the red primary color light, for some images, since all pixels in the picture are in GBR, that is, there is no need to use the "RBR" area, so that the corresponding red fluorescent light and red light are turned on at the same time The laser light source will cause a lot of waste of electric energy, which is not conducive to saving energy and expenses, and seriously affects the practicability of projection equipment products

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