31 results about "LCD projector" patented technology

A phase difference sheet including a substrate and a phase difference film as a tilt film, wherein, in a biaxial refractive index ellipsoid exhibiting a refractive index anisotropy, of three principal refractive indexes nx, ny, nz, the principal refractive index in the length direction of a columnar structure, i.e., the X-axis direction, is nx, the principal refractive index in the major axis direction of an ellipse perpendicular to the X-axis, i.e., the Y-axis direction, is ny, and the principal refractive index in the minor axis direction, i.e., the Z-axis direction, is nz, the following conditional expression (1) is satisfied, and, in a case where the incident angle of a direction tilted to the X-axis side with the normal as a reference is positive, the phase difference of incident light at an incident angle of +30° is Re(+30), the phase difference of incident light at an incident angle of -30° is Re(-30), and the ratio of Re(+30) to Re(-30), i.e., the phase difference ratio, is Re(30) ratio, the following conditional expression (2) is satisfied, ny > nx > nz (1), Re(30) ratio = Re(30) / Re(-30) = 1.1 to 4.0 (2).

The invention relates to the technical field of projectors, and discloses a picture calibration method and device, a projector and a medium. The method comprises the following steps: acquiring attitude angle information and positioning and orientation information of a projection lens; the positioning and orientation information represents distances and directions of the projection lens relative to at least three non-collinear reference points in a projection plane; determining three-dimensional included angle information between the projection plane and the optical axis of the projection lens based on the attitude angle information and the positioning and orientation information; performing angle calculation on the LCD screen based on the three-dimensional included angle information so as to calculate a target pitch angle value and a target deflection angle value which the LCD screen needs to reach; and driving the screen adjusting component to adjust the angle of the LCD screen by taking the pitch angle and the deflection angle of the LCD screen respectively reaching the target pitch angle value and the target deflection angle value. According to the embodiment of the invention, the projection picture quality of the single-chip LCD projector during side projection can be improved.

The invention discloses a double-LCD projector, two paths of LED light sources which are vertically arranged are adopted for illumination, the first path of LED light source in the two paths of LED light sources comprises a first LED light source, fluorescent powder, a light hopper, a first rear Fresnel lens, a first light filter, a first polaroid, a first LCD screen and a first front Fresnel lens which are sequentially arranged from back to front, and the fluorescent powder is arranged on the first LED light source; the second path of LED light source comprises a second LED light source, an aspherical lens, a reflector, a second rear Fresnel lens, a second optical filter, a second polaroid, a second LCD screen and a second front Fresnel lens which are sequentially arranged from back to front; the double-LCD projector further comprises a double-gluing two-phase-color light combining mirror, and the double-gluing two-phase-color light combining mirror, the first front Fresnel lens and the second front Fresnel lens are arranged in a 45-degree mode. According to the invention, the length-width ratio of a horizontal light path and a vertical light path can be effectively avoided, and the light deviation after light combination is reduced.

The utility model relates to a totally enclosed LCD projector heat radiation structure comprising a projector main body, the projector main body is provided with a heat radiation unit, the projector main body is provided with a fan corresponding to the heat radiation unit, the air outlet end of the fan forms an air channel, and the heat radiation unit is located in the air channel; the projector main body comprises a rack, a light machine main body, an LCD display screen, a reflection cup and a light source which are connected in sequence, the fan corresponds to the light machine main body, the LCD display screen and the reflection cup are arranged on the rack, and part of the light machine main body, the LCD display screen and the reflection cup are all located in the air duct. The heat dissipation unit is arranged corresponding to the light machine body, the part of the reflection cup located in the air channel, the LCD display screen and the light source. According to the totally-enclosed heat dissipation structure of the LCD projector, the heat dissipation problem of each heating part of the projector can be solved through a single fan, and a plurality of fans are not needed for heat dissipation, so that a structural frame is simple, the space utilization rate is maximized, an effective air duct is formed, and the totally-enclosed heat dissipation structure of the LCD projector has better market competitiveness.

The disclosure provides a new field sequential single LCD projector, includes an LED light source, a collecting and collimating device, a light-combining and color-filtering device, an intermediate reflector, a focusing device, a light-homogenizing device, an outgoing lens, a LCD light valve, a field lens, an imaging reflector and a projection lens which are arranged in sequence according to the light traveling direction. The LED light source includes a red light source, a green light source and a blue light source. Compared with the existing full-color light valve technology, under the same technical condition, the efficiency of the light valve is greatly improved, the power of the light source is greatly reduced, and the image color gamut is greatly improved, so that the projector can output higher brightness and has vast market adaptability.

The invention relates to a double-fan light leakage prevention open type light machine and an LCD projector. The open type light machine comprises a light machine shell, an imaging assembly, a first fan, a second fan and an air outlet bend shell. The imaging assembly is arranged in the imaging cavity to divide the imaging cavity into a first cooling air duct, a second cooling air duct and a light emitting cavity, the light machine shell is further provided with an air inlet shading grating structure communicating with the top of the light emitting cavity, and a plurality of heat dissipation air inlet gaps are formed in the air inlet shading grating structure; the first fan is arranged below the ray machine shell, the second fan is arranged above the ray machine shell, and the first fan and the second fan are arranged in a central symmetry mode relative to the central point of the LCD screen when observed in the vertical direction; the air outlet bend shell communicates with the lower end of the second cooling air duct. According to the arrangement mode of the first draught fan and the second draught fan, the problem that the LCD screen color is not uniform is effectively solved, and the light leakage problem can be solved through the arrangement of the air inlet shading grating structure and the air outlet curve shell above the light machine shell.

The utility model relates to a phase change heat dissipation low-noise closed light machine and an LCD projector. The closed light machine comprises a shell, an optical device, an internal circulation fan and a heat dissipation module. An internal circulation air duct is formed in the shell, the optical device and the internal circulation fan are both arranged in the internal circulation air duct, and the optical device comprises an LCD screen; the heat dissipation module comprises a fin radiator and a heat sink component, the heat sink component with the phase change material is adopted in the closed light machine and serves as an external heat dissipation part of the closed light machine, heat dissipation is conducted on the fin radiator in a heat storage mode, and the heat dissipation efficiency of the heat sink component is improved. Compared with the prior art that an outer fan is arranged outside the shell to cool the heat dissipation system, the closed optical machine has the advantages of being reasonable in heat dissipation function, low in noise, convenient to use by a user, good in heat dissipation effect, high in heat dissipation efficiency and good in mute effect.

The utility model relates to a low-cost liquid crystal projector which comprises an LED lamp module, an optical polarizing film, a light hopper, an LCD light valve, a first Fresnel lens, a liquid crystal display screen, a second Fresnel lens, a reflecting mirror and a projection lens, and an optical path is arranged between the LED lamp module and the projection lens. The optical polarizing film, the light hopper, the LCD light valve, the first Fresnel lens, the liquid crystal display screen, the second Fresnel lens and the reflector are sequentially arranged at intervals in the length direction of an optical path. Through the front optical polarizer, the size of the optical polarizer does not need to be increased along with the enlargement of the size of the liquid crystal display screen, the cost of the optical polarizer is effectively reduced, and the overall production cost of the liquid crystal projector is further reduced.

The present disclosure provides a LCD projector with multiple display screens and lenses, comprising: light sources, collimating lenses, LCD imagers, field lenses and imaging lenses; the collimating lenses, the LCD imagers, the field lenses and the imaging lenses are sequentially arranged on the optical path emitted by the light sources; the collimating lenses, the LCD imagers and the field lenses are all arranged in parallel; the vertical axes of the collimating lenses, the LCD imagers and the field lenses are maintained on the same axes as the vertical axes of the light emitted by the light sources; the light sources, the collimating lenses, the LCD imagers, the field lenses and the imaging lenses constitute a plurality of groups of imaging groups.

The single-piece LCD projection lens is formed by combining three different spherical lenses, the transfer function is larger than 50% at 14lp / mm, the TV distortion is smaller than 0.2%, and the single-piece LCD projection lens is suitable for a high-definition (1920 * 1080 resolution) single-piece 3.12-inch LCD projector. The focal length is 95 mm, the F / # is 2.8, and the projection ratio is 1.25.

The application relates to an active refrigeration type inner circulation heat dissipation LCD projector and a heat dissipation method, the projector comprising a shell, a first projection channel arranged vertically and a second projection channel arranged horizontally in the shell, a reflection module, an LCD panel module, a light collecting cover, a light source module and a lens module; an inner circulation heat dissipation channel is arranged in the shell, a semiconductor refrigeration module is arranged on the inner circulation heat dissipation channel, and an inner circulation fan for realizing air circulation is arranged; the inner circulation heat dissipation channel extends from the light inlet end of the first projection channel to the light outlet end of the second projection channel along the length direction of the first projection channel and the second projection channel in sequence, the LCD panel module is arranged on the inner circulation heat dissipation channel, and the inner circulation fan is arranged below the lens module; the semiconductor refrigeration module realizes active inner circulation heat dissipation, avoids dust from entering the projector, efficiently dissipates heat for the LCD panel module, and fully utilizes the position below the lens module to arrange the inner circulation fan.

The utility model discloses a liquid crystal projector and an optical system thereof, the optical system of the liquid crystal projector comprises a light source, a liquid crystal panel and a liquid crystal light valve located between the light source and the liquid crystal panel, and the liquid crystal light valve is stacked on the liquid crystal panel; the liquid crystal panel comprises a plurality of display units which are uniformly arranged; the liquid crystal light valve comprises a plurality of light valve units which are in one-to-one correspondence with the display units; the light valve unit is configured to transmit or cut off light emitted from the light source to the corresponding display unit; according to the projector, the problem that the contrast ratio cannot be improved by partition dimming when an LED light source is matched with an LCD display screen in an existing projector can be solved.

The application relates to a high-definition LCD projector with a self-cleaning lens module. The air flow curtain in a sag state plays the role of effectively closing and isolating the lens from external dust for a long time. When needed, the air flow is bidirectionally flowed on the air flow curtain, the air flow is sprayed to the lens surface in a ring-shaped dispersion state, the surface dust of the lens is blown away, the air containing dust is backflowed to the air flow curtain, the lens is blown away again after purification, the frequency of personnel climbing for cleaning is reduced, the risk of personnel climbing for cleaning is reduced, the dust removal filter element and the water tank are combined, the backflowing air is double purified, the cleaning effect on the lens is effectively improved, the dust removal filter element is placed in the water tank to be wet, the manual cleaning process of the lens is realized, personnel do not need to carry cleaning tools when cleaning the lens, and the inconvenience and danger of personnel climbing are reduced.

The utility model relates to a single LCD (liquid crystal display) projection short-focus lens which is formed by combining four different spherical lenses. The single LCD projection short-focus lens is structurally formed by fixing a convex-concave spherical lens with positive diopter, a biconcave spherical lens with negative diopter, a concave-convex spherical lens with positive diopter and a biconvex spherical lens with positive diopter through plastic fasteners. When in use, a liquid crystal display panel and a Fresnel lens with a gradually varied focal length are needed, and the Fresnel lens is placed between the liquid crystal display panel and the combination of the four spherical lenses. Through the cooperation of the above components, the transfer function of the lens is greater than 50% at 11lp / mm, the distortion is less than 0.3%, and the lens is suitable for a high-definition (1920 * 1080 resolution) single-chip 5-inch LCD projector. The focal length is 148mm, the F / # is 3.0, and the projection ratio is 1.3.

The utility model provides a single LCD projector, the single LCD projector comprises a light source, an imaging assembly, an LCD screen and a lens assembly, light emitted by the light source passes through the imaging assembly, the LCD screen and the lens assembly in sequence; the imaging assembly comprises a light uniformizing rod, a first condensing lens, a second condensing lens and a Fresnel lens, light emitted by the light source is diffused when passing through the light uniformizing rod, and then the light passes through the first condensing lens, the second condensing lens and the Fresnel lens in sequence to be imaged to the LCD screen. The projector system is provided with the imaging assembly comprising the dodging rod, the first condensing lens, the second condensing lens and the Fresnel lens, and compared with a traditional non-imaging illumination mode, the illumination uniformity and the color uniformity of the projector system are obviously improved, so that the light source of the projector can adopt an RGB-COB light source, and the color gamut is higher.

The invention discloses a full-plasticized single LCD projection lens, and belongs to the technical field of projection lenses, the full-plasticized single LCD projection lens comprises a negative lens group, a diaphragm, a positive lens group and a Fresnel lens which are sequentially arranged from an object plane to an image plane along an optical axis, and the focal length fA of the negative lens group and the focal length fC of the positive lens group meet the following condition:-3.4 < fA / fC <-3.3. The full-plasticized single-LCD projection lens is excellent in performance, small and light in size, high in resolution ratio, large in relative aperture, low in cost, particularly suitable for a portable single-LCD projector, and capable of guaranteeing that the thermal defocusing phenomenon does not occur when the projection lens works at different environment temperatures from the low temperature of-20 DEG C to the high temperature of 65 DEG C. In addition, the three plastic aspheric lenses are used, so that the cost is reduced, the high resolution is ensured, and meanwhile, high-performance technical indexes such as large relative aperture are realized.

The application discloses a kind of LCD projector lens shift device, including LCD light valve, bottom shell, cover plate, projection lens, vertical displacement component, horizontal displacement component and operating component;The LCD light valve, bottom shell and cover plate are sequentially arranged according to the direction of light travel;The LCD light valve is located on the incident side of the bottom shell and is assembled into an integral whole with the bottom shell;The optical axis of the projection lens and the plane where the display window of the LCD light valve is located are orthogonal;The middle of the cover plate and the bottom shell is hollow structure and is used to pass through the projection lens.The application realizes the mechanical shift of the projection lens, and does not produce loss and influence on the definition of image as electronic trapezoidal correction method, and the application has low manufacturing cost, high cost performance, and is especially suitable for large quantity and wide range, cost-sensitive projector products, and is suitable for single LCD, 2LCD and 3LCD projection technology.

The utility model relates to a closed optical machine with a 3D uniform temperature plate. The closed optical machine comprises a housing, an optical device, an internal circulation fan, a heat radiation module and a heat radiation fan. An internal circulation air duct is formed in the shell, the optical device and the internal circulation fan are both arranged in the internal circulation air duct, the optical device comprises an LCD screen, the heat dissipation module comprises a 3D uniform temperature plate, first heat dissipation fins and second heat dissipation fins, the 3D uniform temperature plate comprises a uniform temperature plate body, a first heat pipe and a second heat pipe, and the first heat pipe and the second heat pipe are connected to the two opposite sides of the uniform temperature plate body. The interiors of the first heat pipe and the second heat pipe are communicated with the uniform temperature plate body, the first heat pipe is sleeved with the first heat dissipation fins which are located in the inner circulation air channel, and the second heat pipe is sleeved with the second heat dissipation fins which are located outside the shell. The structure of the 3D uniform-temperature plate is improved, the 3D uniform-temperature plate comprises the uniform-temperature plate body, the first heat pipe and the second heat pipe, the first heat pipe and the second heat pipe are connected to the two sides of the uniform-temperature plate body, and the first heat pipe and the second heat pipe are both sleeved with the heat dissipation fins, so that a super-efficient heat dissipation module can be formed.

Disclosed is a single LCD projector structure switchable between ultra-short distance projection and medium-long distance projection including a projection module. The projection module includes an LED light source, a condenser cup, a collimating Fresnel lens, an LCD light valve and a focusing Fresnel lens arranged in sequence. The single LCD projector structure further includes a first total reflection mirror and an objective lens module including an objective lens ring and a telescopic mechanism for stretching and retracting of the objective lens ring. A single LCD projector is also provided. The objective lens is shared by ultra-short distance projection and the medium-long distance projection without changing its optical characteristics, thus the objective lens group can move rapidly in a large range and fine focusing is performed in the far end ring or the near end ring, which improves the flexibility and practicability of projection and is suitable for various application scenes.

The invention discloses a closed compact straight tube LCD liquid crystal projector which is characterized in that the projector comprises an optical machine cavity shell, an imaging assembly, a lens assembly and a first radiator, the lens assembly is arranged at the outermost end of the optical machine cavity shell, and the imaging assembly is located in the optical machine cavity shell; the optical machine cavity shell is further provided with an internal circulation airflow cover used for containing an internal circulation fan in an integrated forming mode or an externally-arranged mode, and heat between the imaging assemblies can be forcibly and internally circulated towards blade gaps on one side in the cavity shell through the first radiator through the internal circulation fan. The optical machine cavity shell is further provided with an outer circulation air flow channel in the mode that an outer circulation air channel assembly is integrally formed and / or externally arranged, and an outer circulation fan is arranged in the outer circulation air flow channel. And external fresh air flow can be discharged through the external circulating air flow channel after being forced to pass through the blade gaps on one side, facing the outside of the cavity shell, of the first radiator through the external circulating fan. The heat dissipation device has an excellent internal and external double-circulation heat dissipation effect, and is compact in structure and low in cost.

This invention provides an internal circulation heat dissipation structure for a sealed LCD optical system and an LCD projector, belonging to the field of heat dissipation technology. It includes: a main body, a chip disposed inside the main body, a wind guide plate and heat dissipation mechanism I, a heat dissipation mechanism II disposed on a first side of the main body, and a heat dissipation mechanism III disposed on a second side of the main body. The first and second sides are opposite each other, and the wind guide plate is located below the chip, forming a wind channel between them. Heat dissipation mechanism I includes a wind guide bracket, an internal circulation heat dissipation fan, and a fan pressure plate. The internal circulation heat dissipation fan is fixed to the fan pressure plate and disposed inside the wind guide bracket. The upper edge of the wind guide bracket bends and extends to the side of the chip, forming an air outlet channel between the upper edge of the wind guide bracket and the upper edge of the fan pressure plate, and the air outlet channel communicates with the wind guide channel. This internal circulation heat dissipation structure of the present invention, while preventing dust, makes chip heat dissipation more uniform and improves the heat dissipation effect.

The present application provides a kind of phase difference sheet and liquid crystal projector, the phase difference sheet is equipped with substrate and as inclined film phase difference film, in the plane of the substrate and the film forming surface formed with the phase difference film parallel, the axis of the phase difference generated by the incident light for the incidence angle of +15 ° relative to the normal is +45 ° when the orientation of the slow axis when the substrate is rotated about the normal is azimuth of the substrate, the azimuth of the reference azimuth is 0 ° to 360 °, the phase difference generated by the incident light for the incidence angle of +15 ° relative to the normal is +45 ° when the orientation of the slow axis when the substrate is rotated about the normal is azimuth of the substrate, the absolute value of the difference between the first phase difference of the incident light when the azimuth is +45 ° relative to the reference azimuth and the second phase difference of the incident light when the azimuth is-45 ° relative to the reference azimuth is 6 nm or less.

The invention provides a double-LCD projector optical device, and relates to the technical field of projection display, the double-LCD projector optical device comprises a first light path module and a second light path module, the first light path module and the second light path module have the same structure, and each of the first light path module and the second light path module comprises a light source, a Fresnel lens group for beam shaping, an upper polarizer and an LCD which are sequentially arranged along the light path propagation direction. According to the invention, a double-LCD and double-light-path superposition mode is adopted, so that the brightness of the projector is doubled, and meanwhile, the defect that a single-LCD projector cannot realize a polarization 3D function is overcome.

The application discloses an optical structure for improving the lighting effect of an LCD projector, which comprises an LED light source (1), a first free-form surface lens (2), a free-form surface reflector (3), a second free-form surface lens (4), a polaroid (5) and a liquid crystal panel (6), and the LED light source (1), the first free-form surface lens (2), the free-form surface reflector (3), the second free-form surface lens (4), the polaroid (5) and the liquid crystal panel (6) are sequentially arranged along an optical axis. The first free-form surface lens, the free-form surface reflector and the second free-form surface lens are used for multiple light distribution and collimation of the light source, so that the utilization rate of the light source is maximally improved, the uniformity of the lighting and the collimation degree of the light are improved, the length of the lighting part is obviously shortened, the high-efficiency, uniform and collimated lighting of the LCD liquid crystal screen is realized by using a relatively simple structure, and the lighting part is miniaturized.

The invention discloses a dynamic partition light control LCD projector and a projection display control method. The projector comprises an LED array module, a dodging module, an LCD panel, a projection lens assembly, an SOC, an image analysis module and a partition control module. The image analysis module analyzes an input image signal in real time and calculates a target brightness value and a color temperature demand of each partition; the partition control module generates a control signal according to a target brightness value and a color temperature demand, and independently controls the on-off frequency and the current intensity of each LED partition unit; the projection lens assembly comprises an image sensor, after the image sensor acquires a screen image, the SOC calculates an error between the screen image and an original image and feeds back the error to the partition control module, and the partition control module corrects a control signal by combining data of the image analysis module. According to the invention, high-precision partition brightness and color temperature adjustment is carried out on the LED light source, the contrast ratio is improved, the power consumption is reduced, and the halo effect is inhibited.

The invention discloses an LCD projector supporting side projection reflector adjustment, and relates to the technical field of LCD projectors, and the LCD projector comprises a housing, a lens, a reflector, and an adjustment assembly. The lens is fixedly arranged on the front side of the shell; the adjusting assembly comprises a reflector fixing frame, a motor, a driving wheel, a belt and a driven wheel. The reflecting mirror fixing frame is arranged in the shell, and the reflecting mirror is fixed in the reflecting mirror fixing frame; the driven wheel is fixedly connected with the reflector fixing frame and located at the upper end of the central axis of the reflector fixing frame. The motor is fixedly arranged in the shell and located on the rear side of the reflector fixing frame, the driving wheel is fixedly connected with an output shaft of the motor, and the belt is wound around the driving wheel and the driven wheel at the same time. According to the invention, the angle of the reflector in the projector is adjusted to adapt to the placement angle of the projector, and the projector is clear in analysis picture after side projection through lens focusing compensation.

This invention discloses a single-panel LCD projector, comprising: a housing, an optical engine assembly, and a heat dissipation assembly; the housing has an air inlet and an air outlet; the optical engine assembly is disposed within the housing, and includes a housing and a heat exchanger, the housing having an inner cavity and a mounting port communicating with the inner cavity; the heat exchanger includes a heat exchange substrate and a plurality of heat exchange fins disposed on the heat exchange substrate; the heat exchange substrate is disposed at the mounting port, and the heat exchange fins are disposed in the inner cavity; the heat dissipation assembly is disposed within the housing, and the heat dissipation assembly is detachably connected to the side of the heat exchange substrate away from the heat exchange fins, and at least partially corresponds to the air inlet or air outlet. The technical solution of this invention improves the structural flexibility of the single-panel LCD projector by placing the heat exchanger on the housing and detachably connecting the heat dissipation assembly to the heat exchanger. The shape and size of the heat exchanger can be designed according to the structure of the housing and the internal components of the housing. The heat dissipation assembly and the air inlet or air outlet on the housing can be flexibly arranged according to the space inside the housing.

The utility model relates to a closed light machine and LCD projector of double fan circulation heat dissipation, including: light machine shell, internal circulation fan set, heat dissipation module and external circulation fan, light machine shell includes top shell, middle shell and bottom shell that connect in proper order from top to bottom, top shell and middle shell together enclose a first accommodation cavity, and the bottom shell is equipped with the bottom shell, the first accommodation cavity is equipped with the internal circulation fan set, the heat dissipation module is equipped with the external circulation fan set, and the external circulation fan set is equipped with the external circulation fan set. The bottom shell and the middle shell jointly define a second containing cavity, a first ventilation opening and a second ventilation opening are formed in the bottom of the middle shell, and a partition piece and an imaging module are arranged in the first containing cavity. According to the invention, through the position design of the heat dissipation channel, the fans and the radiator and the mutual cooperation, the heat dissipation of the closed light machine is completed, the heat dissipation efficiency of the projector is improved, the overall power consumption and the size of the projector are reduced, and the projector can be ensured to operate safely and stably; the sealing performance of the optical machine, the high efficiency of heat dissipation, the compactness of the structure, and the safety and stability can be considered.

The utility model relates to a lens and a single-chip LCD projector. The lens comprises a first lens, a second lens and a third lens which are sequentially and coaxially arranged in the opposite direction of emergent light of the lens. The first lens is a convex lens, the second lens is a concave lens, and the third lens is a convex lens; the refractive index of the first lens ranges from 1.75 to 1.80, the refractive index of the second lens ranges from 1.60 to 1.70, and the refractive index of the third lens ranges from 1.60 to 1.70; the dispersion coefficient of the first lens is Vd1, 45 < = Vd1 < = 55, the dispersion coefficient of the second lens is Vd2, 28 < = Vd1 < = 35, the dispersion coefficient of the third lens is Vd3, 50 < = Vd3 < = 60. By selecting the refractive indexes of the first lens, the second lens and the third lens and the dispersion system, the imaging definition of the lens is obviously improved after light enters the lens, so that the imaging definition is improved, the actual imaging effect of the lens is improved, and the watching and using experience of a user is improved.

The utility model discloses an LCD projector, and relates to the technical field of projection equipment. The LCD projector comprises a shell, a liquid cooling system and an air cooling system, a light source, an LCD screen and a lens are arranged in the shell, and light emitted by the light source can be projected through the lens after passing through the LCD screen; the liquid cooling system comprises a first liquid cooling pipe, a first heat exchange piece and a first liquid storage tank, the first liquid cooling pipe is connected with the first heat exchange piece and the first liquid storage tank, cooling liquid is arranged in the first liquid storage tank and the first liquid cooling pipe in a flowing mode, and the first heat exchange piece abuts against the light source in a heat exchange mode; the air cooling system comprises a fan, and the fan is arranged on the side wall of the shell so that air in the shell can be blown out of the shell through the fan. According to the LCD projector, heat accumulation of equipment in a high-brightness and high-power consumption mode can be reduced, the stability and reliability of the equipment are enhanced, the brightness of the projector is prevented from being reduced, and the projection quality is improved.