Novel liquid crystal temperature control light path

Abstract

The novel liquid crystal temperature control light path comprises an excitation light source, a plurality of dichroic mirrors, a plurality of liquid crystals and a plurality of heating light sources, the excitation light source sequentially passes through the dichroic mirrors to be divided into a plurality of light paths, and the light paths are in one-to-one correspondence with the liquid crystals; the plurality of heating light sources are in one-to-one correspondence with the plurality of liquid crystals and are used for heating the liquid crystals. Light emitted by the excitation light source is subjected to color separation through the dichroic mirror, multiple light paths enter multiple liquid crystals respectively, the heating light source can heat the liquid crystals when the temperature of the liquid crystals is low, the heating light source is turned off after the temperature of the liquid crystals is higher than a certain value, and the service life of the liquid crystals is guaranteed.

Description

Technical Field

[0001] This application relates to the field of projector technology, specifically to a novel liquid crystal temperature-controlled optical path. Background Technology

[0002] A projector is a device that projects different colors of light onto a display device to display images through an optical system consisting of a light source, filters, a phosphor color wheel, and a beam splitter. Liquid crystal display (LCD) is a crucial component of the optical system of a laser projector. In a projector, the role of the LCD is to control the arrangement of liquid crystal molecules to change its transmittance and reflectivity, thereby producing images with different grayscale levels and colors. LCD projectors utilize liquid crystal display technology, using an electric field to change the arrangement of liquid crystal molecules, thus affecting their transmittance or reflectivity and ultimately producing color images. According to the principle of projectors, the liquid crystal needs to be exposed to direct laser beams for extended periods. During this time, the liquid crystal temperature will rise rapidly. Fans are typically used to continuously cool the liquid crystal to prevent damage due to high temperatures.

[0003] With the development of the projection industry, more requirements have been put forward for the diversity of projector application scenarios, especially the need for normal use in low-temperature environments. This patent focuses on proposing a solution to the problem of ensuring image quality of LCD in low-temperature environments at 4K resolution.

[0004] When liquid crystals are in a low-temperature environment, the response speed between liquid crystal molecules decreases significantly compared to that at room temperature due to the low temperature. This reduced response speed results in a blurry projected image, severely impacting image quality. The temperature must be controlled within a certain range to resolve this issue.

[0005] This patent will employ a novel optical path to address the problem that image quality is affected by the reduced response speed of liquid crystal molecules in low-temperature environments. Utility Model Content

[0006] The purpose of this application is to overcome the above-mentioned technical deficiencies and provide a novel liquid crystal temperature control optical path to solve the problem of decreased display effect of liquid crystal at low temperatures in the prior art.

[0007] To achieve the above-mentioned technical objectives, the technical solution of this application is as follows: A novel liquid crystal temperature control optical path includes an excitation light source, multiple dichroic mirrors, multiple liquid crystals, and multiple heating light sources, wherein: the excitation light source sequentially passes through the multiple dichroic mirrors to split into multiple optical paths, and each of the multiple optical paths corresponds to one of the multiple liquid crystals; the multiple heating light sources correspond to one of the multiple liquid crystals and are used to heat the liquid crystals.

[0008] Preferably, the liquid crystal is configured as three, and the excitation light source is sequentially separated into a first light path, a second light path, and a third light path by a first dichroic mirror, a second dichroic mirror, and a third dichroic mirror, respectively. The first light path enters the first liquid crystal, the second light path enters the second liquid crystal, and the third light path enters the third liquid crystal.

[0009] Preferably, the novel liquid crystal temperature control optical path includes a first heating light source, which heats the second liquid crystal through the second dichroic mirror.

[0010] Preferably, the novel liquid crystal temperature control optical path further includes a fourth dichroic mirror, and the first optical path enters the first liquid crystal after being reflected by the fourth dichroic mirror.

[0011] Preferably, the novel liquid crystal temperature control optical path includes a second heating light source, which heats the first liquid crystal through the fourth dichroic mirror.

[0012] Preferably, the novel liquid crystal temperature control optical path further includes a fifth dichroic mirror, and the third optical path enters the third liquid crystal after being reflected by the fifth dichroic mirror.

[0013] Preferably, the novel liquid crystal temperature control optical path includes a third heating light source, which heats the third liquid crystal through the fifth dichroic mirror.

[0014] Preferably, the novel liquid crystal temperature control optical path further includes a dichroic prism, wherein the first liquid crystal, the second liquid crystal, and the third liquid crystal are respectively disposed on the three side surfaces of the dichroic prism.

[0015] Preferably, the heating light source is an infrared light source.

[0016] Preferably, the excitation source is a laser.

[0017] Compared with the prior art, the beneficial effects of this application include: the light emitted by the excitation light source is separated into colors by a dichroic mirror, multiple light paths enter multiple liquid crystals respectively, the heating light source can heat the liquid crystal when the liquid crystal temperature is low, and the heating light source is turned off when the liquid crystal temperature is higher than a certain value, thus ensuring the lifespan of the liquid crystal. Attached Figure Description

[0018] Figure 1 This is a simplified structural diagram of the novel liquid crystal temperature control optical path provided in this application;

[0019] Reference numerals in the attached figures: 1-excitation light source, 2-first dichroic mirror, 3-second dichroic mirror, 4-third dichroic mirror, 5-first optical path, 6-second optical path, 7-third optical path, 8-first liquid crystal, 9-second liquid crystal, 10-third liquid crystal, 11-first heating light source, 12-second heating light source, 13-third heating light source, 14-fourth dichroic mirror, 15-fifth dichroic mirror, 16-dichroic prism. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0021] Please see Figure 1 This embodiment provides a novel liquid crystal temperature control optical path, including an excitation light source 1, multiple dichroic mirrors, multiple liquid crystals, and multiple heating light sources, wherein:

[0022] The excitation light source 1 is sequentially separated into multiple optical paths by multiple dichroic mirrors, each corresponding to a different liquid crystal. Preferably, in this embodiment, the excitation light source 1 is a laser. Specifically, there are three liquid crystals. The excitation light source 1 is sequentially separated into a first optical path 5, a second optical path 6, and a third optical path 7 by a first dichroic mirror 2, a second dichroic mirror 3, and a third dichroic mirror 4, respectively. In this embodiment, the first optical path 5 is red light, the second optical path 6 is green light, and the third optical path 7 is blue light. The first optical path 5 enters the first liquid crystal 8, the second optical path 6 enters the second liquid crystal 9, and the third optical path 7 enters the third liquid crystal 10. Further, this novel liquid crystal temperature control optical path includes a first heating light source 11, which heats the second liquid crystal 9 through the second dichroic mirror 3. This novel liquid crystal temperature control optical path also includes a fourth dichroic mirror 14, through which the first optical path 5 is reflected into the first liquid crystal 8. This novel liquid crystal temperature control optical path also includes a second heating light source 12, which heats the first liquid crystal 8 through the fourth dichroic mirror 14. The novel liquid crystal temperature control optical path also includes a fifth dichroic mirror 15, through which the third optical path 7 is reflected into the third liquid crystal 10. Furthermore, the novel liquid crystal temperature control optical path includes a third heating light source 13, which heats the third liquid crystal 10 through the fifth dichroic mirror 15.

[0023] Preferably, the novel liquid crystal temperature control optical path further includes a dichroic prism 16, with the first liquid crystal 8, the second liquid crystal 9, and the third liquid crystal 10 respectively disposed on the three sides of the dichroic prism 16. The dichroic prism 16 is used to combine the three beams of light from the first liquid crystal 8, the second liquid crystal 9, and the third liquid crystal 10.

[0024] Preferably, the heating light source is an infrared light source. Infrared heating technology involves irradiating the object being heated with infrared rays emitted by an infrared radiator. Except for those that are reflected and transmitted, the rest are absorbed by the object and converted into the thermal motion of the material molecules, thereby heating the object.

[0025] Preferably, the novel liquid crystal temperature control optical path also includes temperature sensors. Multiple temperature sensors are used to detect the temperature of multiple liquid crystals. The temperature sensors can be integrated into the liquid crystal or installed on the liquid crystal. When the temperature of the corresponding liquid crystal is low, the heating light source corresponding to the liquid crystal works to heat the liquid crystal through the dichroic mirror and raise its temperature. When the temperature of the corresponding liquid crystal is high, the heating light source stops working. Its control logic and circuit are relatively simple and can use existing ones.

[0026] In summary, the novel liquid crystal temperature control optical path provided in this application separates the light emitted by the excitation light source 1 into multiple colors using a dichroic mirror. Multiple optical paths enter multiple liquid crystals respectively. The heating light source can heat the liquid crystal when the liquid crystal temperature is low. When the liquid crystal temperature exceeds a certain value, the heating light source is turned off to ensure the lifespan of the liquid crystal.

[0027] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Any other corresponding changes and modifications made based on the technical concept of this application should be included within the scope of protection of the claims of this application.

Claims

1. A novel liquid crystal temperature control optical path, characterized in that, It includes an excitation light source, multiple dichroic mirrors, multiple liquid crystals, and multiple heating light sources, among which: The excitation light source passes through multiple dichroic mirrors in sequence to split into multiple optical paths, and each of the multiple optical paths corresponds to a multiple of the liquid crystals; Each of the multiple heating light sources corresponds to one of the multiple liquid crystals and is used to heat the liquid crystals.

2. The novel liquid crystal temperature control optical path according to claim 1, characterized in that, The liquid crystal is configured as three liquid crystals. The excitation light source passes through the first dichroic mirror, the second dichroic mirror and the third dichroic mirror in sequence to separate the first light path, the second light path and the third light path, respectively. The first light path enters the first liquid crystal, the second light path enters the second liquid crystal, and the third light path enters the third liquid crystal.

3. The novel liquid crystal temperature control optical path according to claim 2, characterized in that, The novel liquid crystal temperature control optical path includes a first heating light source, which heats the second liquid crystal through the second dichroic mirror.

4. A novel liquid crystal temperature control optical path according to claim 2, characterized in that, The novel liquid crystal temperature control optical path also includes a fourth dichroic mirror, through which the first optical path is reflected into the first liquid crystal.

5. A novel liquid crystal temperature control optical path according to claim 4, characterized in that, The novel liquid crystal temperature control optical path includes a second heating light source, which heats the first liquid crystal through the fourth dichroic mirror.

6. A novel liquid crystal temperature control optical path according to claim 2, characterized in that, The novel liquid crystal temperature control optical path also includes a fifth dichroic mirror, through which the third optical path is reflected into the third liquid crystal.

7. A novel liquid crystal temperature control optical path according to claim 6, characterized in that, The novel liquid crystal temperature control optical path includes a third heating light source, which heats the third liquid crystal through the fifth dichroic mirror.

8. A novel liquid crystal temperature control optical path according to claim 2, characterized in that, The novel liquid crystal temperature control optical path also includes a dichroic prism, with the first liquid crystal, the second liquid crystal, and the third liquid crystal respectively disposed on the three side surfaces of the dichroic prism.

9. A novel liquid crystal temperature control optical path according to claim 1, characterized in that, The heating light source is an infrared light source.

10. A novel liquid crystal temperature control optical path according to claim 1, characterized in that, The excitation source is a laser.

Images