CN2553576Y - Optical core for high clarity rear-projection TV set - Google Patents
Optical core for high clarity rear-projection TV set Download PDFInfo
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- CN2553576Y CN2553576Y CN 02217691 CN02217691U CN2553576Y CN 2553576 Y CN2553576 Y CN 2553576Y CN 02217691 CN02217691 CN 02217691 CN 02217691 U CN02217691 U CN 02217691U CN 2553576 Y CN2553576 Y CN 2553576Y
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- dichronic mirror
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Abstract
The utility model discloses an optical core for high clarity rear-projection TV set which adopts that a short arc gas-discharge lamp passes through a light reflecting bowl to produce parallel illuminating beams. After passing through two compound eye lenses, the beams are changed into a single beam with a polarization component; and the beam are separated colors by a dichromatism dichroic mirror to reflect red lights, then the red lights are irradiated at a red circuit liquid crystal by a reflector and a lens; the lights transmitted by the dichromatism dichroic mirror is reflected and separated out green lights by the dichromatism dichroic mirror, then the green lights are irradiated at a green circuit liquid crystal by the lens; the blues light after being separated colors by the dichromatism dichroic mirror are irradiated at a blue circuit liquid crystal after passing through the lens, the reflector, the lens, the reflector, and the lens and the reflector; three beams of light which are modulated by the three liquid crystals form a trichroism images, then the three beams of light are compounded to be a beam of color image by a color-combining prism, and then the beam of color image after being projected by a projection objective is projected to be an image at the back screen by the reflector. The utility mode has the advantages of reducing the thickness of the back projector, increasing the color evenness of the display screen, and realizing the big screen multimedia back projecting display with high resolution and lightness, and true color.
Description
Technical field
The utility model relates to a kind of optics movement of high definition rear-projection TV.
Background technology
Back projection shows it is one of main means that realize the high-resolution large scale display, is the important Display Technique of high definition TV.At present conventional CRT (cathode ray tube) rear-projection display device adopts red Tr, green Tg, blue Tb tricolor projection pipe respectively through three projection objective 4r, 4g, 4b, constitute a triangle projection, after the mirror M reflection, image in rear projection screen and synthesize coloured image.This system has been owing to adopted three projection objectives at an angle to each other, so image three-colo(u)r has different angles on screen, very easily causes the inhomogeneities (Fig. 1) of display image screen.Another that occurs utilized the colored projection display system that shows liquid crystal display screen for image source of monolithic at present, this system adopts color LCD screen LCD, the light beam scioptics 2 of lamp 1 are expanded bundle, and collimate by Fresenl mirror 3a, illumination color LCD screen, 3b converges by Fresenl mirror, through lens 5 projection imagings in screen.System is simple, but capacity usage ratio is low, and the color of display image is less, and picture quality is relatively poor, and brightness is hanged down and is suitable for less demanding the small screen demonstration (Fig. 2).The brightness of said system resolution is lower, can't satisfy the requirement that current multimedia display and high definition TV show;
Summary of the invention
The purpose of this utility model provides a kind of optics movement of high definition rear-projection TV.
A kind of optics movement of high definition rear-projection TV adopts short arc gas discharge lamp as light source, uses the reflector of parabolical reflective mirror as lamp, produces parallel illuminating bundle; This light beam is converted to the light beam of single polarized component by the polarization conversion synthesizer behind two fly's-eye lenses; By the one or two look dichronic mirror color separation, reflect ruddiness again, behind the 3rd speculum and the 3rd lens, shine in red road liquid crystal display screen; The light of the one or two look dichronic mirror transmission goes out green glow by the two or two look dichronic mirror reflection color separation, through the first lens lighting green liquid crystal display screen; By after the two or the two look dichronic mirror beam split blue light through the 9th lens, first speculum, the 8th lens shine in blue road liquid crystal display screen after second speculum and second lens; Three-beam is after three LCD panel modulation, form image three-colo(u)r, at the type color-combination prism of forming by four little right-angle prisms through, with the synthetic a branch of coloured image of tri-color beam, through the projection objective projection, reflect the back projection imaging once or twice in back of the body screen by speculum.
The optics movement of another kind of high definition rear-projection TV, adopt the reflector of ellipsoidal mirror as lamp, directly focus illumination is in glass square rod or the even device of hollow beam that has four mirror surfaces to constitute, become the hot spot similar to the liquid crystal display screen shape, pass through the polarization conversion synthesis system then, the 4th lens are through the one or two look dichronic mirror beam split, reflect ruddiness, behind the 3rd speculum and the 3rd lens, shine in red road liquid crystal display screen; The light of the one or two look dichronic mirror transmission goes out green glow by the two or two look dichronic mirror reflection color separation, through the first lens lighting green liquid crystal display screen; By after the two or the two look dichronic mirror beam split blue light through the 9th lens, first speculum, the 8th lens shine in blue road liquid crystal display screen after second speculum and second lens; Three-beam is after three LCD panel modulation, form image three-colo(u)r, at the type color-combination prism of forming by four little right-angle prisms through, with the synthetic a branch of coloured image of tri-color beam, through the projection objective projection, reflect the back projection imaging once or twice in back of the body screen by speculum.
The utility model has the advantages that:
1) uses three-chip type high-resolution LCDs, adopt the optics color separating and combining system, realize the large-screen multimedia rear-projection display device of high-resolution high brightness realistic colour.
2) adopt the system configuration of F type, made system be suitable for the back projection imaging system, reduced the thickness of back reflection projector
3) adopt the color-separation and color-recombination optics interference thin film technology of gradient, realized the color uniformity on the display screen.
4) adopt rotatable lamp bracket structure, made this back projection show that movement can adapt to individual reflection system and secondary reflection system.
Description of drawings
Fig. 1 is a CRT rear-projection display device structural representation;
Fig. 2 is a single-plate color LCD projection display structural representation;
Fig. 3 (a) is a kind of three-chip type back-projecting liquid crystal optics cassette mechanism structure schematic diagram;
Fig. 3 (b) is another kind of three-chip type back-projecting liquid crystal optics cassette mechanism structure schematic diagram;
Fig. 4 is gradient two look dichronic mirror spectral distribution schematic diagrames;
Fig. 5 (a) is an a kind of movement colour splitting system structural representation;
Fig. 5 (b) is another kind of this movement colour splitting system structural representation;
Fig. 6 is two kinds of installation method schematic diagrames of this movement;
Fig. 7 is this movement high accuracy injection moulding sealed structural representation;
Fig. 8 (a) is the lamp bracket positional structure schematic diagram of this movement when being used for the primary event rear-projection;
Fig. 8 (b) is the lamp bracket positional structure schematic diagram of this movement when being used for two secondary reflection rear-projections.
Embodiment
A kind of optics movement of high definition rear-projection TV adopts short arc gas discharge lamp as light source, uses the reflector of parabolical reflective mirror as lamp, produces parallel illuminating bundle; This light beam is converted to the light beam of single polarized component by polarization conversion synthesizer PZ behind two fly's- eye lens 2a, 2b; By two look dichronic mirror D1 color separations, reflect ruddiness again, behind mirror M 3 and lens L3, shine in red road liquid crystal display screen R
LCDThe light of two look dichronic mirror D1 transmissions goes out green glow by two look dichronic mirror D2 reflection color separation, through lens L1 irradiation green liquid crystal display screen G
LCDBy after the two look dichronic mirror D2 beam split blue light through lens L9, mirror M 1 is shone in blue road liquid crystal display screen B after the lens L8, mirror M 2 and lens L2
LCDR, G, B three-beam are after three LCD panel modulation, form image three-colo(u)r, at the X type color-combination prism of forming by four little right-angle prisms through, with the synthetic a branch of coloured image of tri-color beam, through the projection objective projection, reflect the back projection imaging once or twice in back of the body screen by speculum.
The optics movement of another kind of high definition rear-projection TV adopts the reflector 1 of ellipsoidal mirror as lamp, directly focus illumination is in glass square rod or the even device 2 of hollow beam that has four mirror surfaces to constitute, become the hot spot similar to the liquid crystal display screen shape, pass through the polarization conversion synthesis system then, lens L4, through two look dichronic mirror D1 beam split, reflect ruddiness, behind mirror M 3 and lens L3, shine in red road liquid crystal display screen R
LCDThe light of dichronic mirror D1 transmission goes out green glow by two look dichronic mirror D2 reflection color separation, through lens L1 irradiation green liquid crystal display screen G
LCDBy after the two look dichronic mirror D2 beam split blue light through lens L9, mirror M 1 is shone in blue road liquid crystal display screen B after the lens L8, mirror M 2 and lens L2
LCDR, G, B three-beam are after three LCD panel modulation, form image three-colo(u)r, at the X type color-combination prism of forming by four little right-angle prisms through 5, with the synthetic a branch of coloured image of tri-color beam, through projection objective 6 projections, reflect the back projection imaging once or twice in back of the body screen by speculum.
Said two look dichronic mirror D1, two look dichronic mirror D2 have adopted the structure of the film thickness of multilayer film along the gradual change of Y direction.The combination of two look dichronic mirror D1, D2 has two kinds: a kind of is first by two look dichronic mirror D1 reflect red, transmit green and blue light, and two look dichronic mirror D2 reflect green light see through blue light; Another kind is first by two look dichronic mirror D1 reflect blue, transmit green and ruddiness, and two look dichronic mirror D2 reflect green light see through ruddiness.This movement has adopted the lamp bracket structure DJ of adjustable-angle.
Shown in Fig. 3 (a), adopt short arc gas discharge lamp as light source in the system, use the reflector of parabolical reflective mirror as lamp, produce parallel illuminating bundle.This light beam is converted to the light beam of single polarized component through two fly's-eye lens 2a by polarization conversion synthesizer PZ behind the 2b.By two look dichronic mirror D1 color separations, reflect ruddiness again, behind mirror M 3 and lens L3, shine in red road liquid crystal display screen R
LCDThe light of dichronic mirror D1 transmission goes out green glow by two look dichronic mirror D2 reflection color separation, through lens L1 irradiation green liquid crystal display screen G
LCDBy after the two look dichronic mirror D2 beam split blue light through lens L9, mirror M 1 is shone in blue road liquid crystal display screen B after the lens L8, mirror M 2 and lens L2
LCDR, G, the B three-beam is after three LCD panel modulation, form image three-colo(u)r, at the X type color-combination prism of forming by four little right-angle prisms through, with the synthetic a branch of coloured image of tri-color beam, through the projection objective projection, reflect the back projection imaging once or twice in back of the body screen by speculum.Whole optics movement system adopts
Type is arranged, and makes system in projection objective axis direction size minimum, and this also is the more important of the present utility model, is one of design principle of back projection optics movement.
Shown in Fig. 3 (b), adopt the reflector 1 of ellipsoidal mirror as lamp, directly focus illumination is in glass square rod or the even device 2 of hollow beam that has four mirror surfaces to constitute, become the hot spot similar to the liquid crystal display screen shape, pass through the polarization conversion synthesis system then, lens L4 is through two look dichronic mirror D1 beam split, reflect ruddiness, behind mirror M 3 and lens L3, shine in red road liquid crystal display screen R
LCDThe light of dichronic mirror D1 transmission goes out green glow by two look dichronic mirror D2 reflection color separation, through lens L1 irradiation green liquid crystal display screen G
LCDBy after the two look dichronic mirror D2 beam split blue light through lens L9, mirror M 1 is shone in blue road liquid crystal display screen B after the lens L8, mirror M 2 and lens L2
LCDR, G, the B three-beam is after three LCD panel modulation, form image three-colo(u)r, at the X type color-combination prism of forming by four little right-angle prisms through 5, with the synthetic a branch of coloured image of tri-color beam, through projection objective 6 projections, reflect the back projection imaging once or twice in back of the body screen by speculum.Whole optics movement system employing type is arranged, and makes system in projection objective axis direction size minimum.
As shown in Figure 4, two look dichronic mirrors are to be made of multilayer optical interference film.The interference mechanism of optical interference film device based thin film, for the light of different incidence angles degree, reflection has certain skew with the spectrum of transmission.Has good color uniformity in order to ensure the synthetic light beam of colour that is projected on the screen, the multilayer optical film device of two look dichronic mirrors has adopted the structure of the film thickness of multilayer film along the gradual change of Y direction, make the color separation spectrum of color separation film different color separation spectrum be arranged in different Y positions, like this since the off-set phenomenon of the color that causes of different Y position beam incident angle differences just can overcome.
The combination of two look dichronic mirrors shown in Fig. 5 (a) in the optics movement system has two kinds: a kind of is to divide ruddiness earlier, divides bluish-green again.Shown in Fig. 5 a, the D1 reflect red sees through blue green light; D2 reflect green light transmit blue.
Shown in Fig. 5 (b), another kind is first by the D1 reflect blue, transmit green and ruddiness, and the D2 reflect green light sees through ruddiness.Different color separation schemes, different on the rate of finished products of preparation of devices corresponding to different system in combination, and also two systems of the color separation gradient of dichronic mirror are not exclusively the same.But on the effect of projection imaging, there is not too big difference.
As shown in Figure 6, the optics movement that shows of back projection with the image of liquid crystal display screen through reflection back projection imaging once or twice in rear projection screen.The primary event back-projection system is simple in structure, only need a speculum, but the thickness of system is thicker, and the optics movement tilts to put unfavorable Installation and Debugging.Two secondary reflections utilize two speculums of size, realize the light path turnover, reduce the thickness of back projection complete machine, and movement also can level be put.Primary event or two secondary reflections propose different requirements to the structure of optics movement, and system's complete machine structure also is very different, and the thickness of back projection complete machine is also different.
As shown in Figure 7, back projection optics movement adopts the optical element fixed system that constructed of aluminium bracing frame LV combines with high accuracy injection moulding sealing optical element shell K1 in mechanism.High accuracy injection moulding sealing optical element shell adopts housing K1 to add the structure of loam cake K2, fixes all lens and recombination dichroic elements.Fixing of illuminating lamp source, adopt lamp bracket DJ and interchangeable lamp pumping case DL structure, it is two bodies that lamp bracket DJ and high accuracy injection moulding sealing optical element shell adopt housing K1, to realize conveniently exchanging for of lamp.At last high accuracy injection moulding sealing optical element shell is fixed on constructed of aluminium bracing frame LV and goes up complete optics movement of formation.
As shown in Figure 8, in order to make optics movement of the present utility model can adapt to different catoptric arrangement this patents a kind of optics movement that can be applied to different reflective mode operation has been proposed.Lamp bracket structure DJ is changed into the structure of adjustable-angle, the level installation that is applied to secondary reflection when movement is installed with the inclination of primary event, all can guarantee when changing lamp, the extraction direction of lamp pumping case keeps in the horizontal direction to guarantee the system integrity of back projection complete machine, when avoiding changing lamp, because of dismantle difficulty make change lamp after, the position of wick changes influences display effect, simplifies the process change lamp.
Claims (10)
1. the optics movement of a high definition rear-projection TV is characterized in that adopting short arc gas discharge lamp as light source, uses the reflector of parabolical reflective mirror as lamp, produces parallel illuminating bundle; This light beam is converted to the light beam of single polarized component by polarization conversion synthesizer PZ behind two fly's-eye lens 2a, 2b; By two look dichronic mirror D1 color separations, reflect ruddiness again, behind mirror M 3 and lens L3, shine in red road liquid crystal display screen R
LCDThe light of two look dichronic mirror D1 transmissions goes out green glow by two look dichronic mirror D2 reflection color separation, through lens L1 irradiation green liquid crystal display screen G
LCDBy after the two look dichronic mirror D2 beam split blue light through lens L9, mirror M 1 is shone in blue road liquid crystal display screen B after the lens L8, mirror M 2 and lens L2
LCDR, G, B three-beam are after three LCD panel modulation, form image three-colo(u)r, at the X type color-combination prism of forming by four little right-angle prisms through, with the synthetic a branch of coloured image of tri-color beam, through the projection objective projection, reflect the back projection imaging once or twice in back of the body screen by speculum.
2. the optics movement of a kind of high definition rear-projection TV according to claim 1 is characterized in that said two look dichronic mirror D1, two look dichronic mirror D2 have adopted the structure of the film thickness of multilayer film along the gradual change of Y direction.
3. the optics movement of a kind of high definition rear-projection TV according to claim 1 and 2, the combination of said two look dichronic mirror D1, D2 has two kinds: a kind of is earlier by two look dichronic mirror D1 reflect red, transmit green and blue light, two look dichronic mirror D2 reflect green light see through blue light; Another kind is first by two look dichronic mirror D1 reflect blue, transmit green and ruddiness, and two look dichronic mirror D2 reflect green light see through ruddiness.
4. the optics movement of a kind of high definition rear-projection TV according to claim 1 is characterized in that this movement has adopted the lamp bracket structure DJ of adjustable-angle.
5. the optics movement of high definition rear-projection TV according to claim 1 is characterized in that this movement has the type optical component combining structure that is applicable to back projection Display projector object lens axis direction size minimum.
The optics movement of 6 one kinds of high definition rear-projection TVs, it is characterized in that adopting the reflector 1 of ellipsoidal mirror as lamp, directly focus illumination is in glass square rod or the even device 2 of hollow beam that has four mirror surfaces to constitute, become the hot spot similar to the liquid crystal display screen shape, pass through the polarization conversion synthesis system then, lens L4 is through two look dichronic mirror D1 beam split, reflect ruddiness, behind mirror M 3 and lens L3, shine in red road liquid crystal display screen R
LCDThe light of dichronic mirror D1 transmission goes out green glow by two look dichronic mirror D2 reflection color separation, through lens L1 irradiation green liquid crystal display screen G
LCDBy after the two look dichronic mirror D2 beam split blue light through lens L9, mirror M 1 is shone in blue road liquid crystal display screen B after the lens L8, mirror M 2 and lens L2
LCDR, G, B three-beam are after three LCD panel modulation, form image three-colo(u)r, at the X type color-combination prism of forming by four little right-angle prisms through 5, with the synthetic a branch of coloured image of tri-color beam, through projection objective 6 projections, reflect the back projection imaging once or twice in back of the body screen by speculum.
7. the optics movement of a kind of high definition rear-projection TV according to claim 5 is characterized in that said two look dichronic mirror D1, two look dichronic mirror D2 have adopted the structure of the film thickness of multilayer film along the gradual change of Y direction.
8. according to the optics movement of claim 5 or 6 described a kind of high definition rear-projection TVs, the combination that it is characterized in that said two look dichronic mirror D1, D2 has two kinds: a kind of is earlier by two look dichronic mirror D1 reflect red, transmit green and blue light, two look dichronic mirror D2 reflect green light see through blue light; Another kind is first by two look dichronic mirror D1 reflect blue, transmit green and ruddiness, and two look dichronic mirror D2 reflect green light see through ruddiness.
9. the optics movement of a kind of high definition rear-projection TV according to claim 5 is characterized in that this movement has adopted the lamp bracket structure DJ of adjustable-angle.
10. the optics movement of high definition rear-projection TV according to claim 5 is characterized in that this movement has the type optical component combining structure that is applicable to back projection Display projector object lens axis direction size minimum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02217691 CN2553576Y (en) | 2002-05-24 | 2002-05-24 | Optical core for high clarity rear-projection TV set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02217691 CN2553576Y (en) | 2002-05-24 | 2002-05-24 | Optical core for high clarity rear-projection TV set |
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| Publication Number | Publication Date |
|---|---|
| CN2553576Y true CN2553576Y (en) | 2003-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02217691 Expired - Fee Related CN2553576Y (en) | 2002-05-24 | 2002-05-24 | Optical core for high clarity rear-projection TV set |
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| Country | Link |
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| CN (1) | CN2553576Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100357796C (en) * | 2003-07-18 | 2007-12-26 | 株式会社日立制作所 | Projection type display device and back projection type display device using the same |
-
2002
- 2002-05-24 CN CN 02217691 patent/CN2553576Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100357796C (en) * | 2003-07-18 | 2007-12-26 | 株式会社日立制作所 | Projection type display device and back projection type display device using the same |
| US7499111B2 (en) | 2003-07-18 | 2009-03-03 | Hitachi, Ltd. | Projection type display device and back projection type display device using the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030528 |