A CMY color mixing system

Abstract

The present invention discloses a CMY color mixing system, which includes a C color filter, an M color filter, and a Y color filter; the C color filter, the M color filter, and the Y color filter all include a non-coated region and a plurality of coated regions; the difference in the first region ratio between two adjacent coated regions is the same, and the difference in the second region ratio between the non-coated region and an adjacent coated region is the same as the difference in the first region ratio; the white light emitted by an external light source enters the C color filter and then enters the M color filter and finally exits from the Y color filter. The present invention makes the light output change uniform and linear after the white light emitted by the external light source enters each color filter, and ensures that the illuminance ratios of the color filters on the left and right sides are equal when mixing light, so that the light output after the white light emitted by the external light source passes through the C color filter, the M color filter, and the Y color filter in sequence achieves the effect of uniform color mixing.

Description

Technical Field

[0001] The present invention relates to the technical field of uniform light mixing for light emission, and in particular, to a CMY color mixing system. Background Art

[0002] In existing LED lamps, white light lamps have always suppressed colored light lamps with the characteristics of high luminous efficiency and high uniformity, and occupy most of the market. However, white light lamps cannot meet the market's demand for color richness, while the CMY color mixing system can filter white light lamps through filters to meet the market's demand for color richness. However, in the existing CMY color mixing system, different color filters are used for light emission, so that the final light emitted by the white light lamp through the CMY color mixing system cannot achieve the effect of uniform color mixing. Summary of the Invention

[0003] An embodiment of the present invention provides a CMY color mixing system, which can effectively solve the problem that the light emitted by a white light lamp through the CMY color mixing system cannot achieve uniform color mixing in the prior art.

[0004] An embodiment of the present invention provides a CMY color mixing system, including a C color filter, an M color filter, and a Y color filter;

[0005] The C color filter, the M color filter, and the Y color filter all include a non-coated region and a plurality of coated regions; the difference in the ratio of the region between two adjacent coated regions is the first region ratio, and the difference in the ratio of the region between the non-coated region and an adjacent coated region is the second region ratio, and the first region ratio is the same as the second region ratio;

[0006] The white light emitted by an external light source enters the C color filter and then enters the M color filter and finally exits from the Y color filter.

[0007] Preferably, when the white light emitted by the external light source enters each color filter, it enters from the non-coated region of each color filter and exits after passing through a plurality of coated regions.

[0008] Preferably, the shape of the non-coated region of each color filter is semi-circular.

[0009] Preferably, the C color filter, the M color filter, and the Y color filter share a central axis.

[0010] Preferably, the color tolerance between the incident light color and the emitted light color of each color filter corresponds to a 3rd-order MacAdam ellipse.

[0011] Preferably, when the white light emitted by the external light source enters the C color filter, a first light spot is formed on the C color filter; when the white light emitted by the external light source enters the M color filter, a second light spot is formed on the M color filter; when the white light emitted by the external light source enters the Y color filter, a third light spot is formed on the Y color filter; the diameters of the first light spot, the second light spot, and the third light spot satisfy the following formula:

[0012] Lwc:Lwm:Lwy = φy:φm:φc;

[0013] Wherein, Lwc is the first distance between the white light emission point and the center point of the first light spot, Lwm is the second distance between the white light emission point and the center point of the second light spot, Lwy is the third distance between the white light emission point and the center point of the third light spot, φc is the diameter of the first light spot on the C color filter, φm is the diameter of the second light spot on the M color filter, and φy is the diameter of the third light spot on the Y color filter.

[0014] By implementing the present invention, the following beneficial effects are achieved:

[0015] The embodiment of the present invention provides a CMY color mixing system, which includes a C color filter, an M color filter, and a Y color filter; the C color filter, the M color filter, and the Y color filter all include a non-coated area and a plurality of coated areas, and the difference in the area ratio between adjacent two coated areas is the first area ratio value, and the difference in the area ratio between the non-coated area and an adjacent coated area is the second area ratio value, and the first area ratio value is the same as the second area ratio value; after the white light emitted by the external light source enters through the C color filter, it enters the M color filter and finally exits from the Y color filter. Compared with the prior art solution of using color filters with different structures to emit light from the white light emitted by the external light source, the embodiment of the present invention can avoid the phenomenon of light leakage or light reflection at the edges of the color filters during light emission, resulting in uneven light emission, by using three identical color filters to emit light from the external light source. Moreover, in this solution, each color filter is composed of a non-coated area and a plurality of coated areas, the difference in the first area ratio between adjacent two coated areas is the same, and the difference in the second area ratio between the non-coated area and an adjacent coated area is the same as the difference in the first area ratio, so that the non-coated area and the coated area show a uniform increasing trend from the entrance to the exit, thereby making the light emission change of the white light emitted by the external light source after entering the color filter provided by this solution uniform and linear, and ensuring that the illuminance ratios of the color filters on the left and right sides are equal during color mixing light emission, so that the light emission of the white light emitted by the external light source after passing through the C color filter, the M color filter, and the Y color filter in sequence achieves the effect of uniform color mixing. Description of the Drawings

[0016] Figure 1It is a schematic structural diagram of a CMY color mixing system provided by an embodiment of the present invention.

[0017] Figure 2 It is a schematic structural diagram of each color filter of a CMY color mixing system provided by an embodiment of the present invention. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0019] As Figure 1 shown, it is a schematic structural diagram of a CMY color mixing system provided by an embodiment of the present invention. The CMY color mixing system includes: a C color filter, an M color filter, and a Y color filter;

[0020] The C color filter, the M color filter, and the Y color filter all include a non-coated region and a plurality of coated regions. The difference in the ratio of the regions between two adjacent coated regions is the first region ratio, and the difference in the ratio of the region between the non-coated region and an adjacent coated region is the second region ratio, and the first region ratio is the same as the second region ratio;

[0021] The white light emitted by the external light source enters the C color filter, then enters the M color filter and finally exits from the Y color filter.

[0022] For each color filter, as Figure 2 shown, it is a schematic structural diagram of each color filter of a CMY color mixing system provided by an embodiment of the present invention.

[0023] The non-coated region of each color filter is the white light incident region. When the white light enters each color filter, it enters from the non-coated region of each color filter and then exits through a plurality of coated regions. Specifically, the white light starts to cut in from the incident region of each color filter, and this white light incident region is the non-coated region of the color filter, and the shape of the non-coated region is semi-circular; in a preferred embodiment, the arc of this white light incident region can be determined according to the beam size of the actual application scenario.

[0024] The non-coated area of each color filter is a blank glass sheet, that is, the non-coated area has no color-changing effect, and is used to eliminate the phenomenon of sudden light output caused by the double change of brightness plus hue when white light cuts in. Therefore, adopting the non-coated area solution provided by the present invention can avoid the phenomenon of sudden light output, thereby ensuring uniform light output and no color difference of a single color filter, and the color transition change is a linear change. That is, when the CMY color filters are driven by a motor, as different gradient areas of the color filters cut in, the light output color of the lamp will uniformly and linearly transition to the next color, and there will be no sudden change from the starting color to the ending color, that is, no color in the color space will be missing during the transition process.

[0025] The difference in the area ratio between two adjacent coated areas is the first area ratio value, that is, the difference in the area ratio of two adjacent coated areas of each color filter is the same, so that a number of coated areas show a uniform increasing trend from 0% to 100% from the entrance to the exit, which can ensure that the illumination ratios of the CMY color filters on the left and right sides are equal during color mixing, making the final light output color show a uniform change.

[0026] In a preferred embodiment, the difference in the area ratio between the non-coated area and an adjacent coated area is the second area ratio value, and the first area ratio value is the same as the second area ratio value. Then, from the non-coated area to a number of coated areas, there is a uniform increasing trend from 0% to 100%, making the light output change uniform and linear after the white light emitted by an external light source enters the color filter provided by this solution.

[0027] In a preferred embodiment, the first area ratio difference and the second area ratio difference are greater than 0, so that from the non-coated area to a number of coated areas, there is a uniform increasing trend from 0% to 100%.

[0028] Furthermore, by controlling the ratio of the non-coated area and a number of coated areas, the color tolerance of the light output color of each color filter can be controlled. In a preferred embodiment, the color tolerance between the incident light color and the light output color of each color filter is a 3rd-order MacAdam ellipse; specifically, according to the color tolerance principle, by controlling the incident light direction and the light output direction, and through control, the light output color difference corresponds to a 3rd-order MacAdam ellipse, because the difference between the color corresponding to the boundary of the 3rd-order MacAdam ellipse and the central color is just the color difference that can be barely perceived by the human eye, so that uniform light output and no color difference of a single color filter can be ensured.

[0029] In a preferred embodiment, the light spot operation end area of each color filter is larger than the light spot projected after the white light enters the CMY color filter, thereby avoiding light leakage and reflection at the edge of the color filter, which may cause uneven color mixing.

[0030] To ensure that the CMY color mixing system proposed in the embodiments of the present invention occupies the minimum space and is utilized most efficiently during operation, the CMY color mixing system proposed in the embodiments of the present invention uses CMY sheets with the same structure. Each CMY sheet is a single-piece structure, and the CMY sheets can rotate around the center of the circle to emit light from white light. It should be noted that the size and structure of the CMY sheets are the same. The purpose of this is to enable the C color filter, M color filter, and Y color filter to share a central axis, that is, the positions of the color sheet fixed points of each color filter are the same, thus avoiding the problem that the CMY color mixing system occupies a larger space due to the presence of multiple central axes.

[0031] In a preferred embodiment, the white light emitted by the external light source enters the C color filter, then enters the M color filter and finally exits from the Y color filter; specifically, when the white light emitted by the external light source enters the C color filter, a first light spot is formed on the C color filter; when the white light emitted by the external light source enters the M color filter, a second light spot is formed on the M color filter; when the white light emitted by the external light source enters the Y color filter, a third light spot is formed on the Y color filter;

[0032] The diameters of the first light spot, the second light spot, and the third light spot satisfy the following formula:

[0033] Lwc:Lwm:Lwy = φy:φm:φc;

[0034] Wherein, Lwc is the first distance between the white light emission point and the center point of the first light spot, Lwm is the second distance between the white light emission point and the center point of the second light spot, Lwy is the third distance between the white light emission point and the center point of the third light spot, φc is the diameter of the first light spot on the C color filter, φm is the diameter of the second light spot on the M color filter, and φy is the diameter of the third light spot on the Y color filter.

[0035] From the above formula, it can be seen that each color filter of the CMY color mixing system of the present invention has a corresponding relationship with other color filters, and each position corresponds to a light spot diameter. When the position of the C color filter from the external light source and the diameter of the first light spot formed on the C color filter are known, the positions of the M color filter and the Y color filter can be calculated according to the preset diameter of the second light spot and the preset diameter of the third light spot.

[0036] Specifically, 4 points from the starting point to the end point are formed between the white light emission point and the center point of the third light spot on the Y color filter. The color mixing process occurs in the coordinate system. When color sheets with the same gradient trend are used for color mixing for different line segments, the final emitted light color will linearly move along the line formed from the starting point to the end point, and the color will also change linearly accordingly, so that the light emission of a single color filter is uniform and the color mixing light emission changes linearly.

[0037] A CMY color mixing system provided by an embodiment of the present invention designs CMY color filters according to the principle of color mixing and the concept of color tolerance, and through controlling the gradient linearity of each color filter and designing the relationship of the spatial placement positions of each color filter, the light emitted by the lamp, that is, the white light emitted by the light source, can achieve the effects of uniform color mixing and linear transition.

[0038] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A CMY color mixing system, characterized in that, It includes a C color filter, an M color filter, and a Y color filter; The C color filter, M color filter, and Y color filter each include a non-coated area and a number of coated areas; the difference in the area ratio between adjacent two coated areas is the first area ratio value, the difference in the area ratio between the non-coated area and an adjacent coated area is the second area ratio value, and the first area ratio value is the same as the second area ratio value; wherein, the ratio between the area of the coated area and the total area of the C color filter, M color filter, or Y color filter is the area ratio of the coated area in the C color filter, M color filter, or Y color filter; the difference in the area ratio between adjacent two coated areas is the area ratio difference; The white light emitted by the external light source enters the C color filter first, then enters the M color filter and finally exits from the Y color filter.

2. The CMY color mixing system according to claim 1, characterized in that, When the white light emitted by the external light source enters the C color filter, M color filter, and Y color filter in sequence, it enters through the non-coated areas of the C color filter, M color filter, and Y color filter and exits through a number of coated areas.

3. The CMY color mixing system according to claim 1, characterized in that, The shape of the non-coated area of each color filter is semi-circular.

4. A CMY color mixing system according to claim 1, characterized in that, The C color filter, M color filter, and Y color filter share a common central axis.

5. A CMY color mixing system according to claim 1, characterized in that, The color tolerance between the incident light color and the emitted light color of each color filter corresponds to a 3rd-order MacAdam ellipse.

6. The CMY color mixing system according to claim 1, characterized in that, When the white light emitted by the external light source enters the C color filter, a first light spot is formed on the C color filter; when the light emitted by the C color filter enters the M color filter, a second light spot is formed on the M color filter; when the light emitted by the M color filter enters the Y color filter, a third light spot is formed on the Y color filter; the diameters of the first light spot, the second light spot, and the third light spot satisfy the following formula: Lwc:Lwm:Lwy = φy:φm:φc; Wherein, Lwc is the first distance between the white light emission point and the center point of the first light spot, Lwm is the second distance between the emission point of the light emitted by the C color filter and the center point of the second light spot, Lwy is the third distance between the emission point of the light emitted by the M color filter and the center point of the third light spot, φc is the diameter of the first light spot on the C color filter, φm is the diameter of the second light spot on the M color filter, and φy is the diameter of the third light spot on the Y color filter.

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