Laser light source assembly, laser display device, and control method for laser light source assembly

Abstract

The application provides a laser light source assembly, a laser display device and a control method of the laser light source assembly. The laser light source assembly comprises a plurality of light source modules, each of the light source modules comprises at least one laser group and a power supply for supplying power to the at least one laser group, the output power of the power supply is distributed to corresponding lasers according to a set ratio, the output power of the power supply in each of the light source modules is independently controlled, the lasers in the same laser group have the same light-emitting color, and the light-emitting colors of the light source modules are the same. The laser light source assembly of the application is beneficial to reducing power consumption.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of laser display, and particularly relates to a laser light source assembly, a laser display device and a control method of the laser light source assembly. BACKGROUND

[0002] For a laser projector used in a cinema, the laser light source assembly therein usually needs a large adjustable brightness. Especially for a case of having both 2D movie projection and 3D movie projection requirements, the brightness of the laser light source assembly usually needs to be set between 15% and 100%. Two groups of lasers emitting white light are usually arranged in the laser light source assembly. The lasers in one group emit white light in various ways, such as a way of exciting a phosphor with a blue laser and mixing the blue laser to generate white light, and such as a way of mixing light emitted by a blue laser, a red laser and a blue laser to generate white light. Usually, the powers of the two groups of lasers are equal, and the powers of the two groups are synchronously increased or synchronously decreased, so as to adapt to different brightness requirements. SUMMARY

[0003] The present application aims to provide a laser light source assembly, a laser display device and a control method of the laser light source assembly.

[0004] The present application adopts the following technical solution: a laser light source assembly, comprising a plurality of light source modules, each of the light source modules comprising at least one laser group and a power supply for supplying power to the at least one laser group, an output power of the power supply being distributed to corresponding lasers according to a set ratio, the output power of the power supply in each of the light source modules being independently controlled, and the light emitting colors of the light source modules being the same.

[0005] The present application adopts the following technical solution: a laser display device, comprising the aforementioned laser light source assembly.

[0006] The present application adopts the following technical solution: a control method of a laser light source assembly, the laser light source assembly comprising a plurality of light source modules, each of the light source modules comprising at least one laser group and a power supply for supplying power to the at least one laser group, an output power of the power supply being distributed to corresponding lasers according to a set ratio, the output power of the power supply in each of the light source modules being independently controlled, the light emitting colors of lasers in a same laser group being the same, and the light emitting colors of the light source modules being the same; the control method comprising:

[0007] selecting, according to maximum brightness and a target brightness of each of the light source modules, a minimum number of light source modules satisfying the target brightness from the plurality of light source modules;

[0008] setting the output power of the power supply in the selected light source modules, so that the brightness of the selected light source modules is the target brightness.

[0009] Compared with the prior art, the application has the beneficial effect of effectively reducing the power consumption of the laser light source assembly while meeting the expected brightness requirement (i.e. target brightness). BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a structural block diagram of a laser light source assembly according to an embodiment of the application.

[0011] Figure 2 is a brightness-power curve of a light source module.

[0012] Figure 3 is a flowchart of a control method of a laser light source assembly according to an embodiment of the application. DETAILED DESCRIPTION

[0013] In the present application, it should be understood that terms such as "comprise" or "have" are intended to indicate that the presence of the disclosed features, numbers, steps, actions, components, parts or combinations thereof in the specification, but do not exclude the presence of one or more other features, numbers, steps, actions, components, parts or combinations thereof.

[0014] It should also be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments and in conjunction with the accompanying drawings.

[0015] The present application will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0016] As shown in the accompanying drawings, Figure 1 The embodiments of the present application provide a laser light source assembly, which comprises a plurality of light source modules 10, each of which comprises at least one laser group 11 and a power supply 12 for supplying power to the at least one laser group 11, the output power of the power supply 12 is distributed to the corresponding lasers in a set proportion, the output power of the power supply 12 in each of the light source modules 10 is independently controlled, the lasers in the same laser group 11 have the same color, and the light source modules 10 have the same color.

[0017] For example, a red laser group, a green laser group and a blue laser group are provided in a single light source module 10, and the light emitted by the three groups is combined to form white light.

[0018] In one example, in order to combine the three color laser groups to emit white light, the red laser group, the green laser group and the blue laser group, for example, obtain 50% of the output power, 30% of the output power and 20% of the output power of the corresponding power supply, respectively. Of course, the proportion can be adjusted for different models of laser groups and for different display effects.

[0019] In some embodiments, the single light source module 10 is provided with one laser group 11 (for example, one blue laser group with multiple blue lasers). Obviously, the laser group 11 obtains 100% of the output power of the corresponding power supply 100.

[0020] In the single light source module 10, the proportion of the output power of the corresponding power supply 12 allocated to each laser is fixed.

[0021] Reference Figure 2 The inventors of the present application have found that there is a threshold power Pt, below which the laser does not emit light. In particular, when the target brightness of the laser light source assembly is low, each laser in the prior art solution consumes this threshold power Pt. Obviously, if only one or a small number of lasers emit light to meet the target brightness, only one or a small number of lasers consume this threshold power Pt.

[0022] Since the output power of each power supply 12 is independently controlled, that is, the brightness of each light source module 10 is independently controlled. This makes it possible to control the power consumption of the laser light source assembly to be as small as possible while emitting light of the expected brightness.

[0023] The following is a numerical example to show the benefits of independent control of each power supply 12. In this example, the brightness B of the laser in the single light source assembly and the output power P of the corresponding power supply 12 satisfy the following relationship:

[0024]

[0025] Where the unit of output power is W and the unit of brightness is lm.

[0026] The laser light source assembly is provided with two light source modules 10. The following table shows the power consumption data of the laser light source assembly in two working modes.

[0027]

[0028] In some embodiments, the ratio of the maximum brightness of at least one light source module 10 to the sum of the maximum brightness of all light source modules 10 is greater than or equal to 15%.

[0029] In some embodiments, the maximum brightness of each light source module 10 is the same, and the number of light source modules 10 in the laser light source assembly is at least 7.

[0030] The above two embodiments are to make at least one light source module 10 meet the 2D movie projection when the laser light source assembly is used for both 2D movie projection and 3D movie projection. This is also to reduce the number of light source modules 10 emitting light and reduce the consumption of useless threshold power.

[0031] In some embodiments, the laser light source assembly further comprises a control module 20, which is configured to:

[0032] selecting a minimum number of light source modules 10 from the plurality of light source modules 10 to meet the target brightness according to the maximum brightness of each light source module 10 and the target brightness;

[0033] setting the output power of the power supply in the selected light source modules 10 so that the brightness of the selected light source modules 10 is the target brightness.

[0034] The less the number of light source modules 10 working simultaneously, the less the consumption of useless threshold power.

[0035] For example, setting the output power of the power supply in the selected light source modules 10 so that the brightness of the selected light source modules 10 is the target brightness comprises:

[0036] determining the output power of each power supply 12 in the selected light source modules 10 according to the relationship curve between the brightness of each selected light source module 10 and the output power of the power supply 12 therein, with the constraint that the brightness of the selected light source modules 10 is the target brightness and the target that the sum of the output power of the power supply 12 in the selected light source modules 10 is minimum.

[0037] Specifically, the brightness value of the selected light source modules 10 is changed by a preset step, and all combinations of the brightness of the selected light source modules 10 are listed, from which a combination mode corresponding to the minimum sum of the output power is selected.

[0038] Of course, the brightness of the selected light source modules 10 can also be evenly distributed or randomly distributed or preset in other ways.

[0039] Further, the control method further comprises randomly adjusting the output power setting value of the power supply 12 in the selected light source modules 10.

[0040] For example, assuming that the brightness of the laser light source assembly is unchanged, the brightness of each light source module 10 is randomly adjusted relative to each other when starting each time.

[0041] In this way, the service life of each light source module 10 can be similar.

[0042] Embodiments of the present application also provide a laser display device comprising the aforementioned laser light source assembly.

[0043] For example, the laser display device is specifically a laser projector. The laser light source assembly provides illumination for a spatial modulator.

[0044] Based on the same inventive concept, with reference to Figure 3 The embodiments of the present application also provide a control method of a laser light source assembly, the laser light source assembly comprising a plurality of light source modules, each of the light source modules comprising at least one laser group and a power supply for supplying power to the at least one laser group, the output power of the power supply being distributed to corresponding lasers according to a set ratio, the output power of the power supply in each of the light source modules being independently controlled, the lasers in the same laser group having the same color of light, and the light source modules having the same color of light; the control method comprising:

[0045] S1. selecting a minimum number of light source modules satisfying a target brightness from the plurality of light source modules according to the maximum brightness and the target brightness of each of the light source modules;

[0046] S2. setting the output power of the power supply in the selected light source modules so that the brightness of the selected light source modules is the target brightness.

[0047] In some embodiments, the setting of the output power of the power supply in the selected light source modules so that the brightness of the selected light source modules is the target brightness comprises:

[0048] determining the output power of each of the power supplies in the selected light source modules according to the relationship curve between the brightness of each of the selected light source modules and the output power of the light source therein, with the brightness of the selected light source modules being the target brightness as a constraint condition and the sum of the output power of the power supplies in the selected light source modules being the minimum as a target.

[0049] In some embodiments, the method further comprises randomly adjusting the set value of the output power of the power supply in the selected light source modules.

[0050] Each of the embodiments in the present application is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other. Each of the embodiments mainly explains the difference from other embodiments.

[0051] The scope of protection of the present application is not limited to the above-mentioned embodiments. Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the scope and spirit of the present application. If these modifications and variations belong to the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A laser light source assembly, characterized by, The laser light source assembly comprises a plurality of light source modules, each of the light source modules comprising at least one laser group and a power supply for the at least one laser group, the laser group comprising a plurality of lasers, and the output power of the power supply being distributed to the corresponding lasers according to a set ratio, the ratio of the output power of the corresponding light source distributed to each laser in a single light source module being fixed, the output power of the power supply in each of the light source modules being independently controlled, the light-emitting colors of the lasers in the same laser group being the same, and the light-emitting colors of the light source modules being the same. The laser light source assembly further comprises a control module, and the control module is configured to: select a minimum number of light source modules satisfying the target brightness from the plurality of light source modules according to the maximum brightness and the target brightness of each light source module; set the output power of the power supply in the selected light source modules so that the brightness sum of the selected light source modules is the target brightness; set the output power of the power supply in the selected light source modules so that the brightness sum of the selected light source modules is the target brightness, comprising: determining the output power of each power supply in the selected light source modules according to the relationship curve between the brightness of each selected light source module and the output power of the power supply therein, with the brightness sum of the selected light source modules being the target brightness as a constraint condition and the sum of the output power of the power supplies in the selected light source modules being the minimum as a target.

2. The laser source assembly of claim 1, wherein, The ratio of the maximum brightness of at least one light source module to the sum of the maximum brightness of all light source modules is greater than or equal to 15%.

3. The laser source assembly of claim 1, wherein, The maximum brightness of each light source module is the same, and the number of light source modules in the laser light source assembly is at least 7.

4. The laser source assembly of claim 1, wherein, The light source modules emit white light.

5. The laser source assembly of claim 1, wherein, The control module is further configured to: randomly exchange the set values of the output power of the power supplies in the selected light source modules.

6. A laser display device, characterized by comprising: The laser light source assembly comprises the laser light source assembly according to any one of claims 1 to 5.

7. The laser display apparatus of claim 6, wherein The laser display device is specifically a laser projector.

8. A control method of a laser light source assembly, characterized by, The laser light source assembly comprises a plurality of light source modules, each of the light source modules comprising at least one laser group and a power supply for the at least one laser group, the laser group comprising a plurality of lasers, and the output power of the power supply being distributed to the corresponding lasers according to a set ratio, the ratio of the output power of the corresponding light source distributed to each laser in a single light source module being fixed, the output power of the power supply in each of the light source modules being independently controlled, the light-emitting colors of the lasers in the same laser group being the same, and the light-emitting colors of the light source modules being the same; and the control method comprises: selecting a minimum number of light source modules satisfying the target brightness from the plurality of light source modules according to the maximum brightness and the target brightness of each light source module; setting the output power of the power supply in the selected light source modules so that the brightness sum of the selected light source modules is the target brightness; setting the output power of the power supply in the selected light source modules so that the brightness sum of the selected light source modules is the target brightness, comprising: determining the output power of each power supply in the selected light source modules according to the relationship curve between the brightness of each selected light source module and the output power of the power supply therein, with the brightness sum of the selected light source modules being the target brightness as a constraint condition and the sum of the output power of the power supplies in the selected light source modules being the minimum as a target. The output power of each power supply in the selected light source module is determined according to the relationship curve between the brightness of each selected light source module and the output power of the power supply therein, with the brightness of the selected light source module and the target brightness as constraint conditions and the sum of the output power of the power supplies in the selected light source module as the target.

9. The control method according to claim 8, characterized by Also comprising: Randomly adjusting the output power setting value of the power supply in the selected light source module.

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