CN116224702A

CN116224702A - High-brightness projector structure

Info

Publication number: CN116224702A
Application number: CN202310270984.4A
Authority: CN
Inventors: 孙祥龙; 连詹田
Original assignee: Shenzhen Longxiang Zhuoyue Electronic Technology Co ltd
Current assignee: Shenzhen Longxiang Zhuoyue Electronic Technology Co ltd
Priority date: 2023-03-20
Filing date: 2023-03-20
Publication date: 2023-06-06

Abstract

The invention relates to the technical field of projectors, in particular to a high-brightness projector structure, which comprises a projector shell, wherein a light-emitting source is arranged in the projector shell and comprises a red light LED, a green light LED and a blue light LED, a first lens used for focusing the light source and emitting light from the positions of the red light LED, the green light LED and the blue light LED is arranged in the projector shell and positioned at one side of the light-emitting source, a fan is arranged in the projector shell and positioned at one side of the first lens, and the first lens can converge the light-emitting angle from the light-emitting source by arranging the first lens between the light-emitting source and a light hopper, so that light can completely enter the light hopper to avoid light intensity loss, radiant heat on the light-emitting surface of the light-emitting source can also be cooled by virtue of heat dissipation airflow and cannot be conducted to a first Fresnel lens and an LCD, the illumination brightness is effectively enhanced, and the influence of heat radiation of the light-emitting source on the LCD can be avoided.

Description

High-brightness projector structure

Technical Field

The invention relates to the technical field of projectors, in particular to a high-brightness projector structure.

Background

The single-chip liquid crystal projector has higher reduction degree for picture colors, richer colors and lower cost, and is popular in the market.

The projector with the single liquid crystal screen mainly comprises a light bucket, a polaroid, a Fresnel lens, a projection lens, an RGB full-color liquid crystal screen, a white light diode lamp source and the like, and is a projector for improving the performance of the single liquid crystal screen, which is proposed in patent application number CN 202221161277.9.

In the prior art, as in the projector proposed in patent application number CN202221161277.9, a light bucket is required to be arranged between the light-emitting source and the LCD to guide light so as to avoid dispersion of light emitted from the non-imaging light inlet and the light source, but in order to facilitate heat dissipation of the light-emitting surface of the light-emitting source, a space is required to be separated between the light bucket and the light source, at this time, light generated by the light-emitting source is emitted to the periphery, so that light intensity loss is generated, and brightness of the light source inside the projector is affected.

Disclosure of Invention

The present invention is directed to a high brightness projector structure to solve the above-mentioned problems.

The aim of the invention can be achieved by the following technical scheme:

the utility model provides a high-brightness projector structure, includes the projector shell, the inside light emitting source that is provided with of projector shell, the light emitting source includes red light LED, green light LED and blue light LED, the inside one side that just is located the light emitting source of projector shell is provided with the first lens that is used for focusing red light LED, green light LED and blue light LED department to disperse the light source.

The novel light source projector comprises a projector shell, wherein a fan is arranged in the projector shell and positioned on one side of a first lens, an LCD is arranged in the projector shell and positioned in the illumination direction of a light-emitting source, an APCF brightness enhancement film is arranged on one side of the LCD, which is close to the first lens, and a light guide mechanism is arranged between the first lens and the LCD.

Preferably, the light guide mechanism is a light bucket, a heat dissipation backboard is fixedly arranged on one side of the inner wall of the projector shell, packaging glue is arranged on one side of the heat dissipation backboard and used for packaging the red light LEDs, the green light LEDs and the blue light LEDs on the heat dissipation backboard, and the packaging glue is polymer resin added with nano particles.

Preferably, the material of the nano particles is any one of silicon dioxide, titanium dioxide, oxidized aluminum oxide and aluminum oxide, the particle size of the nano particles is 10 nm-5000 nm, and the doping concentration is 0.01% -45.0%.

Preferably, the nano particles are conductive particles, the material is any one of gold, silver and copper, the particle size of the nano particles is 1.0 nm-100 nm, and the doping concentration is 0.01% -10.0%.

Preferably, the polymer resin material is any one of epoxy resin, silicone resin and polyurethane.

Preferably, a heat dissipation fin is arranged in the projector shell and positioned at one side of the fan, and a heat conduction pipe is fixedly connected between the heat dissipation backboard and the heat dissipation fin.

Preferably, a first polaroid and a second polaroid are respectively arranged on two sides of the LCD, a lens is fixedly arranged on the projector shell, a reflecting mirror and a power circuit device are fixedly arranged in the projector shell, a second Fresnel lens is arranged between the second polaroid and the reflecting mirror, and a first Fresnel lens is arranged between the APCF brightness enhancement film and the light hopper.

Preferably, the light guiding mechanism is a second lens, and the second lens is used for continuously converging the emergent light of the first lens and transmitting the emergent light to the direction of the LCD.

Preferably, the first lens and the second lens are made of optical glass or optical plastic, the refractive index of the first lens is 1.45-1.60, the refractive index of the second lens is 1.45-1.60, and the surfaces of the first lens and the second lens are subjected to anti-reflection coating treatment.

The invention has the beneficial effects that:

by using the red light LED, the green light LED and the blue light LED as light sources instead of using a single white light LED as the light sources, an RGB color film structure is not required to be arranged on the LCD, waste heat generated when the light sources pass through the RGB color film structure is avoided, and when the light sources are brightened by adding nano particles and an APCF brightening film into packaging glue and being arranged on one side, the projection quality is prevented from being influenced by high temperature at the LCD.

Through setting up first lens between light emitting source and light fight, the light-emitting angle of light emitting source is received to first lens for light can get into light fight completely and avoid the light intensity loss, and the radiant heat of light emitting source light-emitting surface also can be cooled down by the radiating air current, can not conduct first fresnel lens and LCD, and effectual reinforcing illumination luminance, and can avoid the heat radiation of light emitting source to influence LCD.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to those skilled in the art that other drawings can be obtained according to these drawings without inventive effort;

FIG. 1 is a schematic view of the overall structure of an embodiment of the present invention;

FIG. 2 is a schematic diagram showing a state of white light passing through an RGB full color LCD screen according to the prior art;

FIG. 3 is a schematic view of a prior art light bucket incompletely covering a light source;

FIG. 4 is a schematic diagram of a prior art light bucket fully housing a light source;

FIG. 5 is a schematic view of the structure of the light source and light bucket of FIG. 1;

FIG. 6 is a schematic view illustrating an illumination direction of a light guiding mechanism using a second lens in a second embodiment of the present invention;

fig. 7 is a schematic view of the illumination direction when the first lens and the second lens are used simultaneously in the second embodiment of the invention.

Reference numerals in the drawings are as follows:

1. projector case, 2, red LED,3, green LED,4, blue LED,5, first lens, 6, fan, 7, LCD,8, APCF brightness enhancement film, 9, light bucket, 10, heat dissipation backboard, 11, packaging glue, 12, heat dissipation fin, 13, heat conduction pipe, 14, first polarizer, 15, second polarizer, 16, lens, 17, reflector, 18, power circuit device, 19, second Fresnel lens, 20, first Fresnel lens, 21, second lens, 22, RGB full-color LCD screen, 23, RGB color film structure.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

The utility model provides a high-brightness projector structure, includes projector shell 1, projector shell 1 is inside to be provided with the light emitting source, and the light emitting source includes red light LED2, green light LED3 and blue light LED4, projector shell 1 is inside and lie in one side of light emitting source and be provided with the first lens 5 that is used for focusing red light LED2, green light LED3 and blue light LED4 department to disperse the light source.

The inside of projector shell 1 and be located one side of first lens 5 and be provided with fan 6, the inside of projector shell 1 and be located the illumination direction of luminescent source and be provided with LCD7, one side that LCD7 is close to first lens 5 is provided with APCF brightness enhancement film 8, be provided with light guide mechanism between first lens 5 and the LCD7.

The light guide mechanism is a light bucket 9, a heat dissipation backboard 10 is fixedly arranged on one side of the inner wall of the projector shell 1, a packaging adhesive 11 is arranged on one side of the heat dissipation backboard 10, the packaging adhesive 11 is used for packaging the red light LEDs 2, the green light LEDs 3 and the blue light LEDs 4 on the heat dissipation backboard 10, and the packaging adhesive 11 is polymer resin added with nano particles.

The APCF brightness enhancement film 8 greatly improves the light use rate and increases the brightness of the LCD display screen by using the polarization separation function, so that the APCF brightness enhancement film not only can increase the frontal brightness like a prism sheet, but also can effectively increase the diagonal brightness.

The material of the nano particles is any one of silicon dioxide, titanium dioxide, oxidized aluminum oxide and aluminum oxide, the particle size of the nano particles is 10 nm-5000 nm, and the doping concentration is 0.01% -45.0%.

The nano particles are conductive particles, the material is any one of gold, silver and copper, the particle size of the nano particles is 1.0 nm-100 nm, and the doping concentration is 0.01% -10.0%.

By adding the nano particles into the packaging adhesive 11, the uniformity of a luminous source can be improved, the heat radiation effect can be improved, the service life of a projector can be prolonged, the image quality can be effectively improved, the requirements of ultra-high brightness, high contrast and high chroma are met, and the material, the particle size concentration and the doping concentration of the nano particles are all the best implementation modes obtained through experiments, so that the better effect can be achieved.

The high polymer resin material is any one of epoxy resin, silicone resin and polyurethane.

A heat radiation fin 12 is disposed inside the projector housing 1 and at one side of the fan 7, and a heat conduction pipe 13 is fixedly connected between the heat radiation back plate 10 and the heat radiation fin 12.

The heat dissipation back plate 10 can conduct heat generated by the red LED2, the green LED3 and the blue LED4 serving as light sources to the heat dissipation fins 12 through the heat conducting pipe 13 to dissipate heat, in addition, the fan 6 is located at the heat dissipation fins 12, and the heat dissipation fins 12 can also assist in dissipating heat of air flow generated by the fan 6.

The LCD comprises a projector shell 1, wherein a first polaroid 14 and a second polaroid 15 are respectively arranged on two sides of the LCD8, a lens 16 is fixedly arranged on the projector shell 1, a reflecting mirror 17 and a power circuit device 18 are fixedly arranged in the projector shell 1, a second Fresnel lens 19 is arranged between the second polaroid 15 and the reflecting mirror 17, and a first Fresnel lens 20 is arranged between an APCF brightness enhancement film 8 and a light hopper 9.

As shown in fig. 1, the first polarizer 14 and the second polarizer 15 are disposed on two sides of the LCD7 to eliminate glare and improve color protection, and the first fresnel lens 20 and the second fresnel lens 21 can turn the beam light source with the light source retracted into parallel light.

The working principle of the high-brightness projector structure provided by the invention is as follows:

the light sources emitted by the red light LEDs 2, the green light LEDs 3 and the blue light LEDs 4 sequentially pass through the first lens 5, the first Fresnel lens 20, the first polaroid 14, the LCD7, the second polaroid 15 and the second Fresnel lens 20 to be irradiated on the reflecting mirror 17, and the light sources are reflected by the reflecting mirror 17 and then emitted from the lens 16 to complete projection.

The nano particles are added into the packaging adhesive 11 to enhance the light source, the enhanced light source generates more waste heat at the LCD7, and the APCF brightness enhancement film 8 is arranged at one side to further improve the illumination brightness, but also influence the heat dissipation at the LCD 7;

in the prior art (as in fig. 2): the white light LCD is used as a light source and matched with the RGB full-color liquid crystal screen 21 with the RGB color film structure 22, after the white light in unit area passes through the R, G, B color films respectively, only corresponding red light, green light and blue light pass through, so that the passing light intensity only leaves 25-30% of the original white light intensity, most of the light intensity which does not pass through the white light passes through the white light LCD and is absorbed by the RGB color films to become waste heat, the temperature of the liquid crystal screen is increased by the generated heat energy, the photoelectric property of liquid crystal molecules is damaged, and the transmittance and contrast of the liquid crystal screen are reduced.

In the invention, the following components are added: by using the red LED2, the green LED3 and the blue LED4 as light sources instead of using a single white LED as light source, an RGB color film structure is not required to be arranged on the LCD, waste heat generated when the light source passes through the RGB color film structure is avoided, and when the light source is brightened by adding nano particles and the APCF brightness enhancement film 8 into the packaging adhesive 11, the influence of high temperature on the projection quality at the LCD7 is avoided.

In the prior art, in order to ensure the brightness of the light source, a light bucket 9 needs to be arranged between the LCD7 and the light source, so as to avoid the light dissipation in two ways:

firstly, the light bucket 9 does not completely cover the light emitting source (as shown in fig. 3), at the moment, the heat dissipation air flow from the fan 6 can dissipate heat from the space between the light emitting source and the light bucket 9 to the light emitting source (namely, the red light LED2, the green light LED3 and the blue light LED 4) without influencing the heat dissipation of the light emitting source, but the light source emitted by the light emitting source can also be outwards emitted through the space between the light emitting source and the light bucket 9 to influence the illumination intensity of the light emitting source;

secondly, the light bucket 9 completely covers the light emitting source (as shown in fig. 4), at this time, no space exists between the light emitting source and the light bucket 9, the light source emitted by the light emitting source is not outwards emitted under the influence of the light bucket 9, the illumination intensity of the light emitting source is ensured, but the heat radiation air flow cannot be blown between the light emitting source and the light bucket 9, and the heat radiation capability of radiant heat on the light emitting surface at the light emitting source is affected.

In this application (like fig. 5), through setting up first lens 5 between light source and light fight 9, first lens 5 can converge the light-emitting angle from the light source for light can get into the light fight completely and avoid light intensity loss, and the radiant heat of light-emitting surface of light source also can cool down by the heat dissipation air current, can not conduct to first fresnel lens 20 and LCD7, and effectual reinforcing illumination luminance, and can avoid the thermal radiation of light source to influence LCD7.

Example two

The light guiding mechanism is a second lens 21, and the second lens 21 is used for continuously converging the emergent light of the first lens 5 and transmitting the emergent light to the direction of the LCD7.

The first lens 5 and the second lens 21 may be spherical lenses with the same curvature, or aspherical lenses with different curvatures may be used according to the requirements of the RGB LED light source.

The first lens 5 and the second lens 21 are made of optical glass or optical plastic, the refractive index of the first lens 5 is 1.45-1.60, the refractive index of the second lens 21 is 1.45-1.60, and the surfaces of the first lens 5 and the second lens 21 are subjected to anti-reflection coating treatment.

An anti-reflection coating (AR coating) technology is a prior art, in which the refractive index and the reflective index of the first lens 5 and the second lens 21 are reduced by coating the first lens 5 and the second lens 21 at one time, and a coating (UV/IR filter coating) for filtering ultraviolet light/infrared light wave bands can be added to protect internal devices of the projector and prolong the service life of the projector.

as shown in fig. 6, by using the second lens 21 as a light guide mechanism instead of the light bucket 9, the same effect of avoiding light source divergence as the light bucket 9 can be achieved, and the heat dissipation of the light emitting source by the heat dissipation airflow is not affected;

however, the use of a single lens with high curvature (i.e., the second lens 21) causes serious field curvature and chromatic dispersion, and especially when the light source is a three-wavelength RGB light source, the refractive index and curvature of the lens cannot completely meet the three-wavelength requirement, so that the field curvature and chromatic dispersion are liable to occur (as shown in FIG. 6)

Through the joint use at second lens 21 and first lens 5 for first lens 5 not only can play the light source focus, reduce the light source and scatter, promote the effect of light source intensity, and the substitution light bucket 9 function of second lens 2 not only makes the light guide structure lighter and thinner, promote the heat dispersion of projecting apparatus inner space, can continue the convergence transmission to first fei nier lens 20 and LCD7 with the emergent light of first lens 5 moreover, the design of first lens 5 second lens 21 can further reduce the light source and scatter, promote luminance, and the design of double lens can avoid because of using high curvature single lens, produce serious field curvature and dispersion phenomenon, when the light source is the RGB light source of three wavelength, refractive index and the camber of double lens can accord with the demand of three wavelength, can not produce field curvature and dispersion phenomenon, when effectively improving light source intensity and projecting apparatus projection luminance, promote the heat dispersion to the projecting apparatus inside.

The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims.

Claims

1. The high-brightness projector structure comprises a projector shell (1), and is characterized in that a light-emitting source is arranged inside the projector shell (1) and comprises a red light LED (2), a green light LED (3) and a blue light LED (4), and a first lens (5) used for focusing the light sources at the positions of the red light LED (2), the green light LED (3) and the blue light LED (4) is arranged inside the projector shell (1) and positioned at one side of the light-emitting source;

the novel light source projector comprises a projector shell (1), wherein a fan (6) is arranged at one side of the projector shell (1) which is located at the first lens (5), an LCD (7) is arranged in the projector shell (1) and located in the illumination direction of a light-emitting source, an APCF brightness enhancement film (8) is arranged at one side of the LCD (7) which is close to the first lens (5), and a light guide mechanism is arranged between the first lens (5) and the LCD (7).

2. The high-brightness projector structure according to claim 1, wherein the light guide mechanism is a light bucket (9), a heat dissipation back plate (10) is fixedly installed on one side of the inner wall of the projector housing (1), a packaging adhesive (11) is arranged on one side of the heat dissipation back plate (10), the packaging adhesive (11) is used for packaging the red light LEDs (2), the green light LEDs (3) and the blue light LEDs (4) on the heat dissipation back plate (10), and the packaging adhesive (11) is polymer resin added with nano particles.

3. The projector structure of claim 2, wherein the nanoparticle is made of any one of silicon dioxide, titanium dioxide, oxidized aluminum and aluminum oxide, the particle size of the nanoparticle is 10 nm-5000 nm, and the doping concentration is 0.01% -45.0%.

4. The high-brightness projector structure according to claim 2, wherein the nano particles are conductive particles, the material is any one of gold, silver and copper, the particle size of the nano particles is 1.0 nm-100 nm, and the doping concentration is 0.01% -10.0%.

5. The structure of claim 3 or 4, wherein the polymer resin material is any one of epoxy resin, silicone resin and polyurethane.

6. The high-brightness projector structure according to claim 2, wherein a heat radiation fin (12) is disposed inside the projector housing (1) and on one side of the fan (7), and a heat conduction pipe (13) is fixedly connected between the heat radiation back plate (10) and the heat radiation fin (12).

7. The high-brightness projector structure according to claim 6, wherein a first polarizer (14) and a second polarizer (15) are respectively arranged on two sides of the LCD (8), a lens (16) is fixedly arranged on the projector housing (1), a reflecting mirror (17) and a power circuit device (18) are fixedly arranged in the projector housing (1), a second fresnel lens (19) is arranged between the second polarizer (15) and the reflecting mirror (17), and a first fresnel lens (20) is arranged between the APCF brightness enhancement film (8) and the light hopper (9).

8. A high brightness projector architecture according to claim 1, characterized in that the light guiding means is a second lens (21), the second lens (21) being adapted to continue converging the outgoing light of the first lens (5) and to transmit it in the direction of the LCD (7).

9. The high brightness projector according to claim 8, wherein the first lens (5) and the second lens (21) are made of optical glass or optical plastic, the refractive index of the first lens (5) is 1.45-1.60, the refractive index of the second lens (21) is 1.45-1.60, and the surfaces of the first lens (5) and the second lens (21) are both subjected to anti-reflection coating treatment.