CN1307427A - Screen supporting structure for back-projecting TV wall and the assembled Tv wall - Google Patents
Screen supporting structure for back-projecting TV wall and the assembled Tv wall Download PDFInfo
- Publication number
- CN1307427A CN1307427A CN 99121300 CN99121300A CN1307427A CN 1307427 A CN1307427 A CN 1307427A CN 99121300 CN99121300 CN 99121300 CN 99121300 A CN99121300 A CN 99121300A CN 1307427 A CN1307427 A CN 1307427A
- Authority
- CN
- China
- Prior art keywords
- composite bed
- slab
- dielectric
- supporting structure
- feature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Overhead Projectors And Projection Screens (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
The present invention belongs to the field of structural optics. The front screen structure of back-projecting TV wall includes two kinds, the first comprising beam expanding lens and two separate Fresnel lenses and the second comprising beam expanding lens and composite Fresnel lens. The present invention utilizes a medium board front screen supporting structure and other technological measures to raise the structural strength and the comprehensive effect of the second back-projecting TV wall and to expand its application range.
Description
The video wall product, as jumbotron, high-resolution video display terminal, easy to use with it, save the space, the contrast advantages of higher has been used for numerous places, especially the rear projection TV wall, with its more and more higher ratio of performance to price, will in field more and more widely, obtain to use.
With regard to the preceding screen structure of video wall, present rear projection TV wall can divide two classes:
The first kind: beam expanding lens and the discrete type of Fresnel lens biplate.
Second class: beam expanding lens and Fresnel lens monolithic are compound.
The rear projection TV wall, less image damaged (splicing seams is wide) is arranged, for screen unit, the seam expanded letter now before the screen-wall width (approximately be in general seam wide 50%) of screen be the important indicator of weighing the comprehensive image quality of video wall (representation rate), the rear projection TV wall has higher representation rate.
Up to the present, the screen-wall width of first kind video wall generally can reach 0.3～2.5 millimeter.Representational producer has that (product of TCL Trump Electronics Co., Ltd., screen-wall width are 0.3～0.8 millimeter; The product of Toshiba is 1.75～2.25 millimeters).
What the second class video wall adopted is the thick-walled structure of preceding screen outer surface, and its screen-wall width is watched about 1 millimeter (bag expands the swollen gap of rising) from vertical direction, and (end face of the heavy wall of screen outer surface before will seeing) expands to 2～3 millimeter during oblique watching.
The advantage of the second class video wall, the visual angle is bigger, stitches wide less when vertical angle is watched.But present structure also can't overcome following defective:
The direct reflection of stronger offscreen surface.
Because structural needs must have thicker preceding screen composite bed, the image scattering surface is far away apart from preceding screen outer surface, handles if offscreen surface is carried out the mute light (diffuse reflection) of roughening, though overcome the defective of direct reflection, resolution will deteriorate significantly.
Bigger seam when the broad end face of thicker preceding screen composite bed front end medium is watched the rake angle that causes is wide.During oblique watching, thicker preceding screen medium end face cross section is with in sight, and along with the increase of oblique viewing angle, the width in the end face cross section of being seen is increasing, thereby shows increasing seam wide (image interruption), but 2～3 millimeters of broadening.
Be to overcome the weak point of prior art exactly, shield structural weak point before solving the present second class rear projection TV wall, eliminate the direct reflection of offscreen surface, eliminate the vision screen-wall width (the stravismus seam of video wall is wide) that constantly increases with the increase of angle excursion when rake angle is watched, thereby not only reduced requirement to surround lighting, also will improve resultant effect greatly, widen its range of application.
The preceding screen supporting structure characteristics (the use patented technology of TCL Trump video wall) of first kind back projection type video wall are transformed the present second class video wall, not only can obtain more firm structure, also can overcome many defectives of the present second class video wall.
Utilize main body (the existing patented technology application number 96108558.4 of dielectric-slab internal support technology as supporting technology; 99104562.9 etc.), can allow that like this composite bed is carried out thinning to handle, the surface can overcome this defective of direct reflection after carrying out the mute light transformation of roughening, and does not destroy resolution simultaneously.The tiny end face sectional area of thinning composite bed can effectively overcome rake angle (non-vertical) and stitch wide increase when watching.
The preceding screen that has thicker cross section for present (second class), if existing peripheral end face is polished and cover reflective membrane to be handled, band makes its reflection ray of nearly 100% coated with reflectance coating, there is light to send from the rake angle direction end face of looking peripheral, the wide increase of seam when can't see rake angle and watching (not having image to be interrupted), what in fact, this end face reflected is border picture material nearby.Although reflection is near the mirror image of the picture material the frontier district, and and fict image because the video wall image not have too big resolution, can not produce great visual impact with the mirror image filling.
The invention will be further described with regard to several preferred embodiments of the present invention below in conjunction with accompanying drawing: screen supporting structure schematic diagram before the dielectric-slab in [figure one] A type.Screen supporting structure schematic diagram before the dielectric-slab in [figure two] Type B.Screen supporting structure schematic diagram before the dielectric-slab in [figure three] C type.Screen supporting structure schematic diagram before the dielectric-slab in [figure four] D type.Screen supporting structure schematic diagram before [figure five] triangular-section frame.The composite bed light path schematic diagram of [figure six] end face band direct reflection.The convex-concave degree of the mute optical surface of [figure seven] roughening, to optical transmission, reflections affect characteristics schematic diagram.[figure eight] are with the video wall schematic diagram that preceding screen spliced of structure of the present invention.
Shown in [figure one]: the peripheral end of main support media plate (2) is processed with groove surface (or ladder) (3), is used for overlapping with the front end of connecting plate (5), and bond end can cement with structure glue.Be processed with light and expand bundle (scattering) layer and Fresnel lamina structure on composite bed (1), this beam-expanding layer and Fresnel lamina promptly can be the composite beds of incorporate single chip architecture, also can be discrete biplate structures.The lateral end panel of composite bed (1) and bound edge band (4) cover; Composite bed (1) can separate 0～50 mm distance with main support media plate (2), in order to compensate for the inconsistency of mismachining tolerance and thermal deformation.Bound edge band (4) covers on the peripheral end face of composite bed (1) and main dielectric-slab (3), works to connect two layer assemblies.Projected light (8) can reach the border of composite bed (1) by main dielectric-slab (2).(7) be preceding screen assembly.(6) be back supporting square frame.
Shown in [figure two]: its structure is basic identical with [figure one], bound edge band (14) extends a bending edge (12) forward, combination can realize that the formation of bending edge (12) can be by 2 nearly bendings of 90 ° realize to the bound edge band by bonding.One end of connecting plate (15) is overlapped in the last other end of bending edge (12) and is overlapped on the back supporting square frame (16).(12) be the support media plate, (17) are preceding screen assemblies.
Shown in [figure three]: if the gross thickness of composite bed (21) during less than certain numerical value (about 3mm is following) be referred to as the thinning composite bed, the scheme of [figure one] and [figure two] can not be suitable for, can adopt the mucous membrane cladding process, film (25) is covered in the surface of thinning composite bed (21), the prolongation of film (25) covers on the peripheral end face of main dielectric-slab (22) again, composite bed after the thinning (21) can have 2 advantages: 1) narrower end face cross-sectional width, can make when angle excursion is watched, being unlikely to produce excessive image is interrupted, just do not produce excessive image splicing slit, make picture no matter consistent splicing slit can both be arranged in all angles.2) after the thinning, the mute optical processing of roughening can be carried out in the outer surface interface of preceding screen, after the mute optical processing, can not form direct reflection, help the raising of comprehensive image quality and under the place of multi-faceted surround lighting, can avoid spectators under some visual angles to be subjected to the influence of strong reflection light.
(28) in [figure three] are preceding screen assemblies, and (27) are back supporting square frames, and (26) are connecting plates, and (24) are that bag connects stole, and (23) are at the groove surface (23) of the peripheral end processing of main support media plate (22) (or claiming the concave station face).
The periphery of dielectric-slab is again coated with one deck resistance optical sideband (available packages edge strip band (24) is made the resistance optical sideband), in order to completely cut off bad light string around influence.
Shown in [figure four]: basic identical with the structure of [figure three], the composite bed of thinning (31) directly is overlying on the surface of main support media plate (32), the outer surface of the composite bed of thinning (31) (promptly towards that side surface of the spectators) can be through the mute optical processing of roughening, being processed with hook portion (35) that skewed slot or swallow-tailed skewed slot or raceway groove (seeing the patent application of exercise question for " can be used for the display screen of television wall seamless splicing and with video wall that it spliced " for details) have a hook-shaped stator (34) of hook-shaped flanging at its periphery is embedded among the raceway groove of composite bed periphery, because the swallow-tailed face that mutually combines, can make tighter the reinforcing and be difficult for slippage of composite bed.Comprehensive various factors, hook-shaped stator hook portion width is easy to accomplish between 0.6～0.8.(37) back supporting square frame, (36) are that connecting plate (38) is preceding screen assembly.
Shown in [figure five]: triangle frame (42) is as the support to composite bed (41) supporting, the triangular cross-sectional shape of frame (42), can possess higher-strength and don't hinder projection ray (48), the mode that is connected and fixed of triangle frame (42) and composite bed (41) is by bound edge band (44) and the lateral surface (49) of triangle frame (42) and the end face of composite bed (41) are carried out bonding the realization.Frame in triangular shape cross section (42) and thicker preceding screen composite bed (41) support mutually can constitute a more firm structure, but bulk strength will be inferior to above 4 kinds of structures.(47) be preceding screen assembly, (45) are connecting plate, and (46) are back supporting square frame, and (43) for triangle connects frame, the reservation faying surface of (42) outside.
Shown in [figure six]: if on the end face of composite bed (65) periphery, cover one deck reflector (61), reflector (61) has higher reflectivity, reflex to the viewing area again after the scattered light (67) that the pixel (62) of boundary vicinity is sent projects end face reflection layer (61), the end face of composite bed (65) will have light (68) and penetrate.To can not embody be that dark pixel is interrupted to end section for spectators.(66) be preceding screen outer surface, (64) are divergence of beam layer (beam-expanding layers), and (60) are the projected light from projecting subassembly.
Shown in [figure seven]: the outer surface that the mute optical processing of roughening refers to composite bed (71) carries out processing an amount of, that certain camber is arranged [outer surface of the beam-expanding layer (scattering layer) of first kind back-projection screen is the ditch strip, itself just has the characteristics of the mute light of roughening].
For certain rough surface, will be for the deflection angle of the refracted ray after the refraction of emergent light (72) (76) much smaller than the deflection angle of the reverberation (74) after the incident light (75) from same direction is reflected.Will be to catoptrical degree at random much larger than degree at random to emergent light.(73) be beam divergence layer, i.e. beam-expanding layer.
Thereby the surface of roughening is little to the diffuse transmission influence of the refract light that appears, and remarkable to the effect of catoptrical spuious scattering deflection, this point when diffuser screen overcomes direct reflection just light path needed.
Shown in [figure eight]: from [figure one]～[figure fives'] structure, all be main to rely on main support media plate or the intensity of composite bed keeps shape, thereby after being combined into video wall, the pressure that preceding screen (81) is born is also all mainly fallen on the end face (82) of main support media plate and composite bed, they can keep stable and consistent quadrangle shape, can have powerful supporting strength again.The unit of video wall is made up of two big parts, preceding screen assembly part and projecting subassembly part.One of A type, Type B, C type, D type or triangle section frame supporting structure in preceding screen assembly, have been used.
※ in sum, below to some assemblies among [figure one]-[figure eight], characteristics, the characteristic of parts are described further:
The surface of the thinning composite bed of being explained both can be level and smooth, also can be mute light roughening.
After flanging is meant the edge cover strip band is bent in the bag latticing band of being explained, a resulting low slightly table top.
The dielectric-slab of being explained both can be a transparent medium plate, also can be that a big face of table is processed with Fresnel fringe or is covered with beam expanding lens (layer) dielectric-slab of (also claiming scattering layer) again.
The surface of the protection overlay film of being explained both can be level and smooth, also can be the mute light of roughening.
The mute light of roughening both can have been carried out in the peripheral end face cross section of the composite bed of being explained, thinning composite bed and blacking is handled, also can be at its smooth end at last covering one deck reflective membrane.
Claims (12)
1. screen supporting structure before the A type dielectric-slab.Form by main support media plate, composite bed, bound edge band etc.Its feature just is: have 0～50 mm distance between composite bed and the main dielectric-slab, the bound edge band covers on the peripheral end face of dielectric-slab and composite bed.The front end of connecting plate is overlapped in the recess of main dielectric-slab periphery end face.
2. screen supporting structure before the Type B dielectric-slab.Form by main support media plate, composite bed bound edge band etc.Its feature just have in: have 0～50 mm distance between composite bed and the main dielectric-slab, the bound edge band covers on the end face of dielectric-slab and composite bed periphery, and the front end of connecting plate is overlapped on the inner bending limit of wrapped belt.
3. screen supporting structure before the C type dielectric-slab.By main support media plate, thinning composite bed, protection overlay film layer, compositions such as resistance plain edge.Its feature just is: the surface that the composite bed of thinning is overlying on dielectric-slab; on the composite bed of thinning again coated with protection overlay film layer; hinder optical sideband coated with one deck again on the main dielectric-slab periphery end face; connecting plate both can be overlapped in the recess of main dielectric-slab periphery, also can be overlapped in inner bending place of bound edge band.
4. screen supporting structure before the D type dielectric-slab.Form by main support media plate, thinning composite bed, hook-shaped stator etc.Its feature just is: the composite bed periphery in thinning is processed with the dovetail groove, and the hook portion of hook-shaped stator front end is embedded among the dovetail groove of thinning composite bed periphery.
5. screen supporting structure before the triangular-section frame.Form by triangular form cross section frame composite bed, bound edge band etc.Its feature just is: the cross sectional shape of triangular-section frame is triangular in shape, and the triangular-section frame covers composite bed end face and the realization of triangular-section frame outer periphery with being connected by the bound edge band of composite bed.
6. as claim 1,2 described supporting structures, its feature just is: described composite bed both can be the beam expanding lens of making on same substrate (layer) (also claiming scattering layer), Fresnel lens layer composite bed also can be beam expanding lens (layer) (also claiming scattering layer), Fresnel lens layer separate structure.
7. as supporting structure as described in the claim 3,4, its feature just is: the surface of described thinning composite bed both can be level and smooth, also can be mute light roughening.
8. as supporting structure as described in the claim 2, its feature just is: after described bound edge band invagination limit is meant the edge cover strip band is bent, and a resulting low slightly table top.
9. as claim 1,2,3,4,5 described supporting structures, described dielectric-slab both can be a transparent medium plate, also can be that a Surface Machining has Fresnel fringe or is covered with beam expanding lens (layer) dielectric-slab of (also claiming scattering layer).
10. as supporting structure as described in the claim 4, its feature just is: the surface of described protection overlay film both can be level and smooth, also can be the mute light of roughening.
11. as the supporting structure of screen before as described in the claim, 2,3,4,5, its feature just is: the mute optical processing of roughening both can have been carried out in the peripheral end face cross section of described composite bed, thinning composite bed, also can be at its smooth end at last covering one deck reflective membrane.
12. the video wall with A, B, C, D and triangular-section supporting structure manufacturing is made up of preceding screen assembly part and projection section.Its feature just is: used one of A, B, C, D and triangular-section supporting structure in preceding screen assembly part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99121300 CN1307427A (en) | 1999-11-11 | 1999-11-11 | Screen supporting structure for back-projecting TV wall and the assembled Tv wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99121300 CN1307427A (en) | 1999-11-11 | 1999-11-11 | Screen supporting structure for back-projecting TV wall and the assembled Tv wall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1307427A true CN1307427A (en) | 2001-08-08 |
Family
ID=5281929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99121300 Pending CN1307427A (en) | 1999-11-11 | 1999-11-11 | Screen supporting structure for back-projecting TV wall and the assembled Tv wall |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1307427A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360155A (en) * | 2011-10-13 | 2012-02-22 | 李澄 | Mutually embedded and spliced super large rear projection hard screen |
| CN106796370A (en) * | 2014-10-13 | 2017-05-31 | X开发有限责任公司 | Optical transmission device with integrated structure |
-
1999
- 1999-11-11 CN CN 99121300 patent/CN1307427A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360155A (en) * | 2011-10-13 | 2012-02-22 | 李澄 | Mutually embedded and spliced super large rear projection hard screen |
| CN106796370A (en) * | 2014-10-13 | 2017-05-31 | X开发有限责任公司 | Optical transmission device with integrated structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1125372C (en) | Front projection screen with lenticular front surface | |
| US7990614B2 (en) | Projection screen | |
| EP1517174B1 (en) | Projection screen and projection display device | |
| JP4182261B2 (en) | Brightness-enhanced film with soft cutoff | |
| US5668662A (en) | Front projection screen with lenticular front surface | |
| EP1777586B1 (en) | Transmissive screen and rear projection display apparatus | |
| KR20000062395A (en) | Projection televisions with three-dimensional holographic screens | |
| JPH07119928B2 (en) | Rear projection screen | |
| US7352508B2 (en) | Fresnel lens sheet and transmission type screen comprising it | |
| KR20070103777A (en) | Rear surface projection type screen and rear surface projection type display device | |
| US6046846A (en) | Image projection screen having diffuser to spread light | |
| KR100660786B1 (en) | Transparent screen | |
| CN1307427A (en) | Screen supporting structure for back-projecting TV wall and the assembled Tv wall | |
| JP6953728B2 (en) | Screen, video display device | |
| US4561720A (en) | Transparent rear projection screen | |
| KR20040082955A (en) | Lenticular lens sheet | |
| JP3269175B2 (en) | TRANSMISSION SCREEN AND REAR PROJECTION DISPLAY DEVICE HAVING THE SAME | |
| JP2002341452A (en) | Image projecting device, multiple image projecting device and screen | |
| EP1051858B1 (en) | Projection television with holographic screen and partly occluded projection lens | |
| TW200421004A (en) | Lens optimization and color correction for image projection systems | |
| CN1519643A (en) | Transmitting screen, and back projecting image displaying device | |
| JP2732496B2 (en) | Transmission screen | |
| JP2948117B2 (en) | Rear projection display system | |
| US6671093B2 (en) | Screen for rear projection type projector | |
| CN213987158U (en) | Giant joint screen |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |