Optical machine structure of single LCD (liquid crystal display) projector

Abstract

The optical-mechanical structure comprises a light source, light rays are emitted by the light source and sequentially pass through a light cup, a rear Fresnel lens, a polaroid, heat-resistant glass, an LCD screen and a front Fresnel lens, and then an image is projected on the screen through a lens; the rear Fresnel lens is attached to the light cup and used for adjusting and optimizing light spots, eliminating stray light, improving the lighting effect and protecting the light cup, the rear Fresnel lens and the polaroid are arranged in a spaced mode, the polaroid and the heat resistance glass are both used for reducing the temperature of the LCD screen, and the heat resistance glass and the polaroid are arranged in a spaced mode and attached to the LCD screen. The heat spread to the LCD screen is further reduced by matching with the heat-resistant glass while the light heat is reduced through the polarizing plate, and the heat-resistant glass is attached to the LCD screen, so that not only is the heat generated in the using process of the LCD screen reduced, but also the direct influence of the external high-temperature environment on the LCD screen is prevented, and the risk that the LCD screen is damaged due to overheating is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of projectors, and in particular to an optical-mechanical structure of a single LCD projector. Background Art

[0002] With the rapid development of display technology, liquid crystal display (LCD) has become one of the mainstream display technologies today due to its advantages such as high resolution, low power consumption and wide application scenarios. However, during operation, the LCD screen will absorb a lot of heat due to the heat of light or the external environment. Long-term high-temperature operation will not only affect the display effect, but may also reduce the reliability and life of the LCD screen. Therefore, how to effectively reduce the operating temperature of the LCD screen and improve its reliability and life has become an urgent problem to be solved in the current display technology field. Utility Model Content

[0003] In view of this, the present application provides an optical-mechanical structure of a single LCD projector, which reduces the heat of light by using a polarizing plate and further reduces the heat transmitted to the LCD screen by using heat-resistant glass. The specific technical solution is as follows:

[0004] The optical-mechanical structure of a single LCD projector includes a light source, wherein light is emitted by the light source, passes through a light cup, a rear mirror, a polarizing plate, a heat-resistant glass, an LCD screen and a front mirror in sequence, and then projects an image onto a screen through a lens; the rear mirror is attached to the light cup, used for adjusting and optimizing light spots, eliminating stray light, improving light efficiency and protecting the light cup, and is spaced apart from the polarizing plate; the polarizing plate and the heat-resistant glass are both used for reducing the temperature of the LCD screen, and the heat-resistant glass is spaced apart from the polarizing plate and attached to the LCD screen.

[0005] Preferably, the light source is a distributed LED light source, so that the heat generated by the light source can be evenly distributed to a plurality of LED units.

[0006] Preferably, a micro-array lens for arranging the light is disposed in the optical cup to improve the uniformity and distribution of the light.

[0007] Preferably, a reflective film is provided on one side of the polarizer to reflect part of the light to reduce the conversion of light energy into heat energy, and a transmittance control film is provided on the other side to reduce the heat of light. The outer sides of the reflective film and the transmittance control film are covered by a protective film.

[0008] Preferably, the light utilization rate of the polarizer is 30% to 65%.

[0009] More preferably, the light utilization rate of the diaphragm is 50%.

[0010] Preferably, the heat-resistant glass is made of one of quartz glass, borosilicate glass and special coating glass.

[0011] Preferably, a reflector is provided between the front mirror and the lens for adjusting the projection direction of the light.

[0012] Further preferably, the reflector is arranged along a 45° direction.

[0013] Preferably, the light source dissipates heat through a thermally conductive base.

[0014] Beneficial effects of this application:

[0015] (1) The polarizing plate reduces the heat of light and the heat-resistant glass further reduces the heat transmitted to the LCD screen. The heat-resistant glass attached to the LCD screen not only reduces the heat generated by the LCD screen during use, but also blocks the direct impact of the external high temperature environment on the LCD screen, thereby reducing the risk of damage to the LCD screen due to overheating;

[0016] (2) The micro-array lens makes the light evenly distributed and homogenizes the heat carried by the light, thereby greatly improving the thermal insulation of the polarizing plate and the heat-resistant glass, thereby improving the reliability and life of the LCD screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the optomechanical structure described in this application.

[0018] In the figure: 1. light source, 2. micro-array lens, 3. optical cup, 4. rear mirror, 5. polarizer, 6. heat-resistant glass, 7. LCD screen, 8. front mirror, 9. lens, 10. reflector, 11. thermal base. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described in the present application are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0020] Combination Figure 1, the optical-mechanical structure of the single LCD projector described in the present application is further described, including a light source 1, light emitted by the light source 1, passing through an optical cup 3, a rear mirror 4, a polarizing film 5, a heat-resistant glass 6, an LCD screen 7 and a front mirror 8 in sequence, and then projecting an image onto a screen through a lens 9; after the light is concentrated and blended by the optical cup 3, the quality of the projected image can be significantly improved, including brightness, uniformity, color reproduction, clarity and contrast, etc. The rear mirror 4 is attached to the optical cup 3, used to adjust and optimize the light spot, eliminate stray light, improve light efficiency and protect the optical cup 3, and is spaced apart from the polarizing film 5, the polarizing film 5 and the heat-resistant glass 6 are both used to reduce the temperature of the LCD screen 7, and the heat-resistant glass 6 is spaced apart from the polarizing film 5 and attached to the LCD screen 7.

[0021] In this embodiment, the light source 1 is a distributed LED light source, so that the heat generated by the light source 1 can be evenly dispersed to multiple LED units, which helps to reduce the heat dissipation pressure caused by heat concentration and makes the light projected on the LCD screen 7 more uniform; and the LED light source has good thermal conductivity and can efficiently transfer heat with the help of the heat dissipation structure.

[0022] In this embodiment, a micro-array lens 2 for arranging the light is provided in the optical cup 3 to improve the uniformity and distribution of the light. The light emitted by the light source 1 is homogenized by the focusing and diffusion effect of the micro-lens units in the micro-array lens 2 to homogenize the heat carried by the light, reduce the appearance of light spots and dark areas, and improve the overall brightness uniformity of the projected image; and by adjusting the arrangement and parameters of the micro-lens units, the propagation direction and angle of the light can be controlled, so that the light can be more accurately projected onto the subsequent optical elements after passing through the optical cup 3, improving the clarity and resolution of the projection, while accurately controlling the propagation path and distribution of the light to reduce light loss and scattering.

[0023] The polarizer 5 has a reflective film on one side for reflecting part of the light to reduce the conversion of light energy into heat energy, and a transmittance control film on the other side for reducing the heat of light. The reflective film and the transmittance control film are covered with protective films on the outside.

[0024] The light utilization rate of the polarizer 5 is 30% to 65%. Specifically, the light utilization rate of the polarizer is 50%. While ensuring the light utilization efficiency and the picture brightness, the total amount of light transmitted to the LCD screen 7 is reduced to reduce the heat generated by the light, which helps to reduce the overall temperature of the projector.

[0025] The material of the heat-resistant glass 6 is one of quartz glass, borosilicate glass and special coating glass. In this embodiment, the material of the heat-resistant glass 6 is special coating glass, and the surface of the glass is coated with a special reflective or transmissive film layer to adjust the distribution and intensity of light, and at the same time block the heat carried by the light passing through the polarizer 5, so as to further reduce the heat carried by the light propagating to the LCD screen 7, so as to improve the reliability and life of the LCD screen 7.

[0026] A reflector 10 is provided between the front mirror 8 and the lens 9 for adjusting the projection direction of the light and optimizing the distribution of the light to reduce the scattering and loss of the light, thereby enhancing the brightness and contrast of the picture and helping to eliminate stray light and interference light.

[0027] In this embodiment, the reflector 10 is arranged along a 45° direction so that the light reflection direction is perpendicular to the original propagation direction, which is used to improve the light utilization rate while reducing the overall size of the projector.

[0028] In this embodiment, the light source 1 dissipates heat through a thermally conductive base 11 .

Claims

1. Optical-mechanical structure of a single LCD projector, characterized in that: The invention comprises a light source, light is emitted by the light source, passes through a light cup, a rear mirror, a polarizing plate, a heat-resistant glass, an LCD screen and a front mirror in sequence, and then projects an image onto a screen through a lens; the rear mirror is attached to the light cup, used for adjusting and optimizing the light spot, eliminating stray light, improving the light efficiency and protecting the light cup, and is spaced apart from the polarizing plate; the polarizing plate and the heat-resistant glass are both used for reducing the temperature of the LCD screen; the heat-resistant glass is spaced apart from the polarizing plate and attached to the LCD screen.

2. The optical-mechanical structure of the single LCD projector according to claim 1, characterized in that: The light source is a distributed LED light source.

3. The optical-mechanical structure of the single LCD projector according to claim 1, characterized in that: A micro-array lens for arranging the light is arranged in the optical cup to improve the uniformity and distribution of the light.

4. The optical-mechanical structure of the single LCD projector according to claim 1, characterized in that: A reflective film is provided on one side of the polarizer to reflect part of the light to reduce the conversion of light energy into heat energy, and a transmittance control film is provided on the other side to reduce the heat of light. The outer sides of the reflective film and the transmittance control film are covered by a protective film.

5. The optical-mechanical structure of a single LCD projector according to claim 1 or 4, characterized in that: The light utilization rate of the polarizer is 30% to 65%.

6. The optical-mechanical structure of the single LCD projector according to claim 5, characterized in that: The light utilization rate of the oscillator is 50%.

7. The optical-mechanical structure of the single LCD projector according to claim 1, characterized in that: The material of the heat-resistant glass is one of quartz glass, borosilicate glass and special coating glass.

8. The optical-mechanical structure of the single LCD projector according to claim 1, characterized in that: A reflector is provided between the front mirror and the lens for adjusting the projection direction of the light.

9. The optical-mechanical structure of the single LCD projector according to claim 8, characterized in that: The reflector is arranged along a 45° direction.

10. The optical-mechanical structure of a single LCD projector according to claim 1, characterized in that: The light source dissipates heat through a heat-conducting base.

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