134 results about "Rear-projection television" patented technology

Methods and systems are described herein which produce polarization-independent full color images suitable for rear-projection television sets and other multimedia displays. The system uses illumination with R, G, B light from two different light sources for each color. A viewer wears glasses with narrowband optical filters, preferably holographic filters. The R, G, B light from the light sources is slightly offset at each of the 3 emission wavelengths, with one set of R, G, B light being filtered by the holographic filter in front of the left eye of the, and the other set of R, G, B light being filtered by the holographic filter in front of the viewer's right eye.

The invention relates to an illumination module for color display, preferably for use in data or video projectors as well as rear projection television sets, in which the light from at least three luminescent diodes (LEDs) or LED arrays of the base colors red, green and blue is collimated at a point provided for connection to a display unit and ranged on an optical axis of the illumination module. An LED or an LED array of a base color with a beam path (Lr) oriented in the direction of the display unit is arranged on the optical axis of the illumination module. For the purpose of color mixing, the LEDs and LED arrays of the other base colors are attached in such a way tat their beam paths (Lg, Lb) are laterally input in sequence under input angles (α, β) of <90 degrees into the beam path (Lr) of the first base color.

The multiple picture frames decollating system belongs to the field of video digital image treating technology, and is especially multiple picture frame great screen TV wall decollating display system. The present invention consists of two parts, including multiple picture frame decollator and large screen display equipment. The multiple picture frame decollator consists of a computer with video and audio treating card, operation system and control software, a control monitor and sound box. The large screen display equipment is large screen liquid crystal screen, plasma screen or large screen rear projecting TV with VGA / DVI interface. The present invention may be used in multiple picture frame monitoring in different fields. The present invention may be controlled in different modes.

There is a need for providing a projection optical system that is appropriate for maintaining high resolution with low distortion, miniaturizing a reflector, decreasing the number of reflectors, and decreasing the depth and the bottom (or top) of a display used for a rear projection television, for example. The projection optical system according to the invention enlarges and projects images from a primary image surface existing at a reducing side to a secondary image surface existing at an enlarging side. The projection optical system has a first optical system L11 and a second optical system L12. The first optical system L11 forms an intermediate image (position II) of the primary image surface. The second optical system L12 has a concave reflector AM1 that forms the secondary image surface resulting from the intermediate image. A light beam travels from the center of the primary image surface and to the center of the secondary image surface and crosses an optical axis. The light beam is reflected on the concave reflector, crosses the optical axis again, and reaches the secondary image surface.

A Fresnel lens sheet of a multifocal type is intended to be used in combination with a lenticular lens sheet to construct a rear projection screen for a rear projection television receiver. An annular portion (2) of the Fresnel lens sheet at a distance (R) in a range of 0.05 h to 0.5 h, where h is the height of the Fresnel lens sheet, from the optical center (C) of the Fresnel lens sheet, have the shortest focal length fmin among those of other portions of the Fresnel lens sheet, whereby uniformity in brightness of a screen employing the Fresnel lens sheet can be achieved. Alternatively, a portion where an exit angle ( theta ) of outgoing light ray relative to a normal to the surface of the Fresnel lens sheet is the greatest, lies at a distance (R) in a range of 0.3 h to 0.8 h from the optical center (C) of the Fresnel lens sheet, to obtain the same result.

In order to minimize light diffraction along the direction of switching and more particularly light diffraction into the acceptance cone of the collection optics, in the present invention, micromirrors are provided which are not rectangular. Also, in order to minimize the cost of the illumination optics and the size of the display unit of the present invention, the light source is placed orthogonal to the rows (or columns) of the array, and / or the light source is placed orthogonal to a side of the frame defining the active area of the array. The incident light beam, though orthogonal to the sides of the active area, is not however, orthogonal to any substantial portion of sides of the individual micromirrors in the array. Orthogonal sides cause incident light to diffract along the direction of micromirror switching, and result in light ‘leakage’ into the ‘on’ state even if the micromirror is in the ‘off’ state. This light diffraction decreases the contrast ratio of the micromirror. The micromirrors of the present invention result in an improved contrast ratio, and the arrangement of the light source to micromirror array in the present invention results in a more compact system. Another feature of the invention is the ability of the micromirrors to pivot in opposite direction to on and off positions (the on position directing light to collection optics), where the movement to the on position is greater than movement to the off position. A further feature of the invention is a package for the micromirror array, the package having a window that is not parallel to the substrate upon which the micromirrors are formed. One example of the invention includes all the above features.

In a rear projection television, cathode ray tubes are mounted inside an enclosure so that each cathode ray tube projects output images onto a rear projection screen using a corresponding electron beam. Calibration images are generated for each cathode ray tube. A camera, also mounted inside the enclosure, acquires an input image of each calibration image. A distortion in each input image is measured, and the output images of the cathode ray tubes are corrected by adjusting the signals controlling the corresponding electron beams according to the distortion.

The present invention relates to an illuminator that comprises one or a plurality of light panels which further comprise highly directional solid-state lighting units, wherein the light component emitted from the highly directional solid-state lighting unit has high directivity, and a light panel comprising an array of the highly directional solid-state lighting units need no additional optical elements to collimate or condense the light emitted from the light panel. The present invention also relates to the applications thereof in video display apparatuses, rear projection televisions, printers, scanners, copy machines, and more. The present invention realizes a uniform high luminous solid-state color source and video display apparatus of compact size that exhibits high utilized efficiency of a luminous flux from the light panel source and can provide a uniform image. The present invention can be used in general lighting, automobile lighting and other display systems. Its compactness, high optical utilized efficiency, brightness and uniformity, low cost design and ability to project a still or moving picture with high color reproduction capabilities make it useful in the applications described above.

The invention discloses a multi-band enhancement type metal reflection film and a preparing method thereof. The enhancement type metal reflection film comprises a substrate, a chrome film layer, a transition bonding layer, a metal layer, a non-absorption transition layer and an enhancement medium film, wherein the transition bonding layer is made of fine copper with the purity larger than 99.9% or made of the mixed materials of copper and nickel. The enhancement type metal reflection film is characterized in that the adhesive force of the film layer is good, visible-light / laser / infrared (or laser / infrared ) multi-band wide-angle reflection can be achieved, the reflectivity is high, the multi-band enhancement type metal reflection film can be widely applied to the military and civilian photoelectron technical fields such as multi-function integrated photo-electricity devices, high-power LED chips and high-definition rear-projection televisions.

A display apparatus, such as a rear projection television, includes a housing, a display panel and a plurality of LED heat dissipating modules disposed in the housing. The display panel is connected to the housing, and each of the LED heat dissipating modules includes a pulsating heat pipe, a plurality of fins, and a plurality of LEDs for providing light to the display panel. The LEDs are disposed on the pulsating heat pipe and located at the vaporizing section, and the fins are connected to the pulsating heat pipe and all located at the condensing section for increasing the heat dissipating area.

The invention relates to an illumination module for color display, preferably for use in data or video projectors as well as rear projection television sets, in which the light from at least three luminescent diodes (LEDs) or LED arrays of the base colors red, green and blue is collimated at a point provided for connection to a display unit and arranged on an optical axis of the illumination module. According to the invention, an LED or an LED array of a base color with a beam path (Lr) oriented in the direction of the display unit is arranged on the optical axis of the illumination module. For the purpose of color mixing, the LEDs or LED arrays of the other base colors are attached in such a way that their beam paths (Lg, Lb) are laterally input in sequence under input angles (α, β) of <90 degrees into the beam path (Lr) of the first base color.

There is a need for providing a projection optical system that is appropriate for maintaining high resolution with low distortion, miniaturizing a reflector, decreasing the number of reflectors, and decreasing the depth and the bottom (or top) of a display used for a rear projection television, for example. The projection optical system according to the invention enlarges and projects images from a primary image surface existing at a reducing side to a secondary image surface existing at an enlarging side. The projection optical system has a first optical system L11 and a second optical system L12. The first optical system L11 forms an intermediate image (position II) of the primary image surface. The second optical system L12 has a concave reflector AM1 that forms the secondary image surface resulting from the intermediate image. A light beam travels from the center of the primary image surface and to the center of the secondary image surface and crosses an optical axis. The light beam is reflected on the concave reflector, crosses the optical axis again, and reaches the secondary image surface.

A transparent substrate for an optical engine of a rear-projection television receiver or a liquid crystal image projector, in particular, for protecting an original image forming panel of the optical engine, the transparent substrate characterized by being formed from a transparent highly-thermal-conductive cubic polycrystal plate, exhibiting good transmission of light or the like, good thermal conductivity, and good operability, and a rear-projection television receiver including the transparent substrate. It is favorable that the transparent substrate formed from the transparent highly-thermal-conductive cubic polycrystal and provided with a coating layer on a surface is used. Preferably, the coating layer is a multilayer. It is favorable that the material for the coating is at least two types selected from metal fluorides, metal oxides, and zinc compounds. The optical transparency is improved and the environmental stability is also improved by the coating.

The invention belongs to a projection light source, a projection optical system and projection display equipment. An optical engine consists of the projection light source, a fly eye lens array, a polarized light converter, a field lens, an alignment lens, a micro lens array, an imaging device LCD screen and a projection lens. A luminous device of the projection light source is a white light power LED array, and a light concentrating element is a collector array. The luminous device, the light concentrating element, the fly eye lens array, the polarized light converter, the micro lens array and an LCD screen lamp with a CF film are reasonably designed and combined to make the projection optical engine acquire high lighting effect and high light output. Because of adopting an LED as a light source lamp, the projection optical engine also has the advantages of long service life, short response time, easy driving, no radiant heat, environmental protection, energy saving, low cost and the like. The optical engine is used as a core component, and is combined with a circuit and a complete machine structure to form a front projection and rear projection device such as a front projector or a rear projection television.

A Liquid Crystal on Silicon (LCOS) kernel for a light engine is configured in a kernel having light paths in three dimensions (3D kernel). The 3D kernel allows for designs that do not require Wavelength Dependent Waveplates (WDWS) (or Wavelength Specific Retarders) for managing light polarizations within the 3D kernel. In one embodiment, the 3D kernel includes a Polarizing Beam Splitter (PBS) that is positioned to direct lightpaths within the 3D kernel in the 3rd dimension (e.g., light path planes perpendicular to planes of input light provided to the 3D kernel). The 3rd dimension is, for example, an output light path perpendicular to an input light plane. The 3D kernel allows for designs that incorporate reflective LCOS microdisplays and management of light paths without WDWs. The kernel is suitable for use in High Definition (HD) LCOS Rear Projection Televisions (RPTVs) and other projector applications.

The present invention relates to optical technology, and is especially cylindrical lens constituent for rear projection screen and its making process. The cylindrical lens combination includes cylindrical lens array and light absorbing stripes and features that the surface of the cylindrical lens combination is covered with transparent material of refractive index smaller than that of the cylindrical lens material. The present invention has the benefit effect that light is reflected totally in the sides of the cylindrical lens units and outgone from the top of cylindrical lens units so as to form black stripes in the non-outgoing areas, resulting in high contrast. The present invention provides cylindrical lens combination with high resolution and high contrast for high resolution rear projecting TV.

The present invention provides an inexpensive rear projection television including a cooling structure that blows air directly against a heating element that generates heat to become hot, thus suppressing a rise in the temperature of the heating element. In addition, the shapes of having exhaust ducts are simplified, thus reducing the cost. A first duct 71 and a second duct 101 are formed to have generally U-shaped cross sections; air blown by a first blowing fan 70 is exhausted to the exterior through the first duct 71 and external air is supplied to a second blowing fan 100 through the second duct 101. The U-shaped opening sides of the ducts are attached to a lower cabinet 5 to form cylindrical paths. Consequently, the costs of the ducts are lower than those of integrally cylindrically molded ducts.

The protective cover includes frame and dust prevention curtain, supporting rack on the frame. Frame and supporting rack together form an open type cover body to accommodate TV set. Winding shaft and rotation control set of the winding shaft are setup on the frame, and one end of the dust prevention curtain is fixed on the winding shaft. The frame structure of the dust prevention curtain provides enough rigidity to protect TV set from impact. Decoration picture can be printed on or cleaning brush can be setup on the dust prevention curtain. Thus, the dust prevention curtain possesses effects of protection and dust prevention as well as function of decoration. The invention is suitable to liquid crystal, plasma (LCD, flat) TV, or back projection TV.

A rear projection television includes a casing with a space therein and a plurality of modular units. A plurality of maintenance holes are formed through the casing to communicate with the space. The modular units are positioned in the space to correspond to the maintenance holes. When one component inside the casing needs repairing, only a lid covering the corresponding maintenance hole is dismounted for the user to quickly take the component out, without moving the casing. Thereby, the repair process is simplified with saved repair labor and space.

The invention relates to a natural tea tree oil screen cleaning fluid composed of the following compounds according to parts by weight: the weight ratio among benzalkonium chloride, tea tree oil and ionized water is equal to 9 to 23: 35 to 55: 74 to 98. The cleaning fluid of the invention uses the benzalkonium chloride, the tea tree oil and the ionized water as raw materials, is environment-friendly, can sterilize, is free from damaging the screen coating film, leaves no wiping trace on the screen, can quickly and efficiently remove the dust, dirt and fingerprint on the liquid crystal screen, has the functions of decontamination and sterilization, is anti-static and dustproof, can reduce the accumulated dust, can clear the surface of the screen without trace, can form a protection film on the wiping surface, has sterilizing property, and can avoid bacterial virus spreading so as to help people away from virus. The cleaning fluid of the invention has wide application scope, and can be used for TFT liquid crystal display, notebook computer screen, liquid crystal television, rear projection television, plasma television, VCD and DVD discs, and the like.

The invention discloses a kind of television which can change the start image online and the method, the user can display any image and text on the start image according to the demands. The computer VGA output interface is connected with the VGA input interface of the lightshow back projecting television, when the computer is powered on, it loads the image and text mode, makes the VGA input end of the lightshow and back projecting television display the preset image and text. The microprocessor of the lightshow back projecting television is controlled to act through the OSD menu of the television, reads the preset image and text on the VGA inputting end, and stores them in the EPROM. The television read the image and text file in the EPROM, and reduces the into R, G, and B data, they are inputted into the display driving circuit, the image and text can be displayed on the television screen, realizes the online change of the start image.

A Liquid Crystal on Silicon (LCOS kernel for a light engine is configured in a kernel having light paths in three dimensions (3D kernel). The 3D kernel allows for designs that do not require Wavelength Dependent Waveplates (WDWs) (or Wavelength Specific Retarders) for managing light polarizations within the 3D kernel. In one embodiment, the 3D kernel includes a Polarizing Beam Splitter (PBS) that is positioned to direct lightpaths within the 3D kernel in the 3rd dimension (e.g., light path planes perpendicular to planes of input light provided to the 3D kernel). The 3rd dimension is, for example, an output light path perpendicular to an input light plane. The 3D kernel allows for designs that incorporate reflective LCOS microdisplays and management of light paths without WDWs. The kernel is suitable for use in High Definition (HD) LCOS Rear Projection Televisions (RPTVs) and other projector applications.

A film attaching method for attaching a film on a substrate is provided. The film attaching method includes the following steps. First, a film is disposed on the substrate. Then, gas between the film and the substrate is driven out. Ultimately, an airtight joint is formed between the edge of the film and the edge of the substrate so that the film is attached to the substrate. The film attaching method is applied to the screen of a rear projection television to provide the rear projection television with good optical characteristics.

A shelving unit is provided to be mounted on a television, such as a rear projection television, to enable a consumer to position audio / visual components on the television. The shelving unit comprises a mounting member adapted to be secured to a vertical wall extending from the back of the television housing's top surface or deck, a shelf securable to the mounting member to extend rearwardly from the television's vertical wall, and a leg member extending downwardly from the shelf and having a bottom end which engages the television sloped surface. The leg member has a length sufficient to maintain the shelf in a generally horizontal position. The mounting member is positioned on the television vertical wall such that the shelf is supported below the level of the television deck, and such that that audio / visual equipment can be operated either by its respective remote control or by control buttons on the audio / visual equipment.

Abstract of Disclosure The rear projection television of the present invention comprises an optical assembly; an optical engine disposed on the lower supporting base of the optical assembly; a hood member coupled to an end of the supporting base at the front end of the optical engine; an inlet disposed on the hood member, the inlet having an elastic sealed cover which allows the projection lens of the optical engine to be extended inside the hood member and closely wraps the external diameter of the projection lens; a first mirror disposed in front of the projection lens; a second mirroris disposed on the upper end of the inner side of the hood member along the optical path of the small reflective projection lens. A screen is coupled to the outlet of the hood member along the optical reflection path of the second mirror. Covering the components one by one by means of a hood member and a screen according to the size of the optical path and excluding the optical engine of the heat-generating element outside constitute a sealed space with an isolation of air from the exterior for preventing the external dust, moisture, and temperature. Thus, such arrangement constitutes an optical assembly of the present invention.

Abstract of Disclosure The present invention is a fixture for reflection mirror. Wherein a plurality of adhering sections are set on surrounding edges inside a rear frame of a rear projection television. Depending on dimensions and weights of different reflection mirrors, an area of the adhering section can be adjusted. Then to coat glue on adhering sections, and the back surrounding edges of the reflection mirror is stuck on the adhering sections, therefore the reflection mirror is fixed on the rear frame. Due to the adhering sections being on the back of the reflection mirror, the reflection mirror is used as a reflection surface of reflecting a light beam back to a screen without blocking of the adhering sections and interference of the rear frame so as to effectively use the reflection surface.

A light diffusing screen for a single light source-type rear projection television, for use in combination with a Fresnel lens sheet, which can reduce scintillation and, regulate the surface roughness of the screen and provide good images. The light diffusing screen includes: a lens layer which can horizontally refract projected light; and a light diffusing layer provided on a light outgoing side as compared with the lens layer. The light diffusing layer includes a light transparent matrix and light diffusing fine particles formed of a light transparent material dispersed in the light transparent matrix. The light diffusing layer has a multilayer structure of which the outermost layer on the light outgoing side of the light diffusing layer is a layer which diffuses light most strongly, the outermost surface layer on the light outgoing side in the light diffusing screen having a surface roughness Ra of 0.2 μm≦Ra≦1.0 μm.

A anti-superheat monitoring system of the rear-projection television includes the MCU, temperature detect device, bare engine control module, power switch control module and display screen. It controls the temperature of the devices within certain scale through temperature monitoring and warning system. It can realize the self-maintenance and guarantee the back casting television in the safe mode without the man-made interference.

An opaque matrix that defines transparent apertures may be formed on a lenticular lens by applying an infrared radiation sensitive material to the flat surface of the lenticular lens, projecting infrared radiation through the lenticular lens onto the infrared radiation sensitive material to create exposed and unexposed areas of the infrared radiation sensitive material, and removing the exposed areas of the infrared radiation sensitive material from the flat surface of the lenticular lens. The infrared radiation sensitive material includes an infrared absorbing dye and a colorant. The infrared radiation sensitive material may also include a binder. A barrier layer may be disposed between the flat surface of the lenticular lens and the infrared radiation sensitive material. The barrier layer may include a binder, an infrared absorbing dye, and a crosslinking agent. The resulting lenticular lens may be used in a rear projection television screen or monitor.