CN2313233Y

CN2313233Y - High-clarity rear-projection screen

Info

Publication number: CN2313233Y
Application number: CN 97203325
Authority: CN
Inventors: 张凤楼; 张华�
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-04-11
Filing date: 1997-04-11
Publication date: 1999-04-07
Anticipated expiration: 2007-04-11

Abstract

The utility model relates to a high-definition rear-projection screen, which is provided with high-transparency acrylic acid materia processed into a flat screen base plate in the injection method. A plate surface of a side surface which receives light source is provided with uniformly distributed spiral striations which are formed by heating compression molding by high-precision molds; a diffused light layer which sucks light in the diffuse reflection method is processed on one side surface of an imaging picture of the diffused light. The screen makes projection image screening not disturbed by natural light in the environment, guarantees the high definition of the projection image in various rooms with normal ambient light, and improves the display effect and the display quality of the screened image through projection. Thus, the utility model is widely used for commanding monitoring systems of the national defence department, the military department, the public security department and the aerospace department, various analogue display for production scheduling of industrial and mining establishments, such as transportation, communications, electric power, petrifaction, etc., and eletrification instruction in colleges and technical secondary schools.

Description

The high definition rear projection screen

The utility model relates to a kind of all kinds of balop that are, the high definition projection screen that computing machine joint control Projection Display image is supporting, mainly be widely used in national defence, military, public security, commander's monitoring of space flight department, transportation, communication, electric power, the various simulations of the production scheduling of industrial and mining enterprises such as petrochemical industry show universities, electronic teaching, technical training, convention, the water conservancy flood control, meteorological environmental protection, data shows, stock future, finance, the market, all kinds of trade markets and stage background, TV station, dancing hall, office, fields such as the giant-screen demonstration of movie theatre.

The screen major part that existing projector uses is just to throw, the machine curtain all is exposed to whole room, projected light beam all crosses the space under the condition of certain distance, spectators often take a seat along aspect the level in the hall, most of spectators' vision all is subjected to the intervention of projected light beam in varying degrees and influences, and health greatly affects one's power of vision.The rear projection screen image of projection input rearward shows it is relatively to adapt to watching of various environmental baselines, and is little to eyesight influence.And existing rear projection screen degree different all have not fogging clearly, major issue such as the captions picture brightness is inhomogeneous does not satisfy the hope of spectators' perceptual quality effect.Especially projection light is in refraction, reflection (near will the adding together or the twice catoptron of projector distance) the loss part of projector distance, and rear projection screen itself absorbs a part of, and the shortcoming of rear projection screen maximum is that center brightness is higher, and solar effect appears in screen center.The center brightness of the optical projection lens of present more advanced design and edge brightness evening ratio differ about 25%, rear projection screen also is subjected to the interference of indoor physical environment light, and these still unsolved at present difficult problems directly influence the sharpness of projection projected images, captions.

The purpose of this utility model is to overcome the shortcoming of prior art, designs the rear projection screen that a kind of high-definition image shows.

The utility model is realized by following measure:

This rear projection screen has the higher acrylic acid material of a transparency and adopts injection method, be processed into smooth curtain substrate, its thickness can be between 3-8mm, accept the equally distributed lira of useful high-precision mold heated pressure moulding on the plate face of a side of light source at it, processing is provided with the diffusion photosphere of one deck diffuse reflection extinction on a side of diffusion light imaging picture, thereby provide a kind of projected image, captions clear, the rear projection screen new product that colour reproduction is true to nature.

The equally distributed lira that the acceptance of described substrate drops into a side of light source can be to use high-precision mold, the Fresnel lira of heated pressure moulding and constitute Fresnel transmission template, described lira distance between centers of tracks is 0.33-0.55mm, and described lira groove depth is 0.25-0.30mm; Form along channel(l)ed plate face (similar coarse grating form) along striped and process the diffusion photosphere of last layer diffuse reflection, extinction in a side heat pressure forming half garden column of the diffusion light imaging picture of substrate; Its planar alignment spacing of suitable bar groove of described arrangement semicolumn pattern is 0.25-0.80mm, ditch depth is 0.21-0.25mm, semi-cylindrical horizontal angle 2a=158 ± 3 °, angle is 33 ± 2 ° between two ditches, described is to be formed by some vertical little transmissive bodies along the bar groove, described little transmissive body can be determined the clear uniform light of certain mode scattering, should contain 1818 described little transmissive bodies at least at the every wide 1000mmm of screen cover.This rear projection screen is indeformable in ± 41 ℃ environment, and effectively scattering angle is 33 °≤2a≤55 °, 2.5≤luminance factor 3.4.

The ellipse lira that a side of accepting light source of the rear projection screen of another kind of pattern distributes with high-precision mold heated pressure uniform in shaping constitutes the transmittance plate face (similar trajectory form) of ellipse lira pattern, described ellipse lira spacing is 0.25-0.55mm, and the lira groove depth is 0.18-0.21mm.One deck diffuse reflection in the one side processing of described diffusion light imaging picture, the diffusion photosphere of extinction are high density diffusion photosphere, and its thickness is 0.03-0.05mm.This pattern rear projection screen is indeformable in ± 41 ℃ of environment, and effectively scattering angle is 38 °≤2a≤49 °, 2.1≤luminance factor≤2.5.

More than the high definition rear projection screen of two kinds of patterns to manufacture specification as required be 72 cun, 84 cun, 100 cun, 120 cun, 150 cun.

The lira transmission that evenly distributes of screen surface Fresnel transmittance plate form or ellipse is board-like, semicolumn is along bar groove pattern, all adopt stainless steel or aluminum alloy material to become mould through high-precision processing, and with addition of heat, compression system, the precision techniques data of its Mould Machining are equal to the corresponding technical indicator of screen sides face.The specification of mould is 1730 * 1300 * 100mm～3100 * 2100 * 100mm4 kind model.

Advantage of the present utility model:

Owing to adopt the basic baseplate material of curtain of higher clarity; design high-precision processing mould; screen is accepted the one side of light source; use at the different condition environment according to screen; heated pressure moulding Fresnel transmittance plate pattern and the ellipse lira form that evenly distributes respectively; can be the light source of accepting to come with 87% ratio transmissive; again with refraction; reflected version is with the diffuse reflection that images in the suitable bar groove of semi-cylindrical of gain; the diffusion photosphere of extinction; make the projection projected images not be subjected to the interference of natural light in the environment; guarantee the high definition at the indoor projected image of various home light, such rear projection screen has improved the image display effect and the quality of establishing the shadow projection greatly.

The utility model is further described as follows below in conjunction with accompanying drawing:

Fig. 1: high definition rear projection screen (similar coarse grating form) is accepted the transmission flaggy synoptic diagram of light source one side;

Fig. 2: the diffusion photosphere synoptic diagram of imaging picture one side of high definition rear projection screen shown in Figure 1 (similar coarse grating form);

Fig. 3: high definition rear projection screen (similar trajectory form) is accepted the transmission flaggy synoptic diagram of light source one side

Fig. 4: the diffusion photosphere synoptic diagram of high definition rear projection screen shown in Figure 3 (similar track form) imaging picture one side.

Embodiment 1:

To adopt high grade of transparency acrylic acid material, be processed into the thick plane curtain base substrate 1 of 3～8mm with injection method, it accepts the one side 1-1 of light source, through mold heated pressure forming Fresnel transmission form plate face (seeing shown in Figure 1), substrate 1 passes through the half-terete suitable bar groove 1-2 of mold heated pressure forming equally in the face of a side of spectators' imaging, its spacing is 0.44mm, and the degree of depth is 0.27mm.Add the diffusion photosphere 1-3 (seeing shown in Figure 2) of one deck diffuse reflection, extinction, be cut into 72 cun, 84 cun, 100 cun, 120 cun, 150 cun finished product rear projection screens according to specification.The visible angle α of this screen can be 90 °, and 2 α can be 180 °.

Embodiment 2:

The high grade of transparency acrylic acid material thick plane curtain base substrate 2 of injection method addition 3～8mm will be adopted, a side 2-1 who accepts light source is through mold heated pressure forming ellipse form equally distributed lira transmittance plate face (seeing shown in Figure 3), the spacing of lira is 0.35mm, and the degree of depth is 0.2mm; Real estate is provided with last layer high density diffuse reflection as thin as a wafer, the diffusion photosphere of extinction (seeing shown in Figure 4) to a side 2-2 of spectators' imaging, and its thickness is 0.04mm.Be cut into 72 cun, 84 cun, 100 cun, 120 cun, 150 cun finished product rear projection screen according to specification.The visible angle α of this screen can be 90 °, and 2 α can be 180 °.

Claims

1, a kind of high definition rear projection screen, it is characterized in that: have the higher acrylic acid material of a transparency and adopt injection method, be processed into smooth curtain substrate, its thickness 3-8mm, at its equally distributed lira of accepting useful high-precision mold heated pressure moulding on the plate face of a side of light source, processing is provided with the diffusion photosphere of one deck diffuse reflection extinction on a side of diffusion light imaging picture.

2, high definition rear projection screen according to claim 1, it is characterized in that: the equally distributed lira that the acceptance of described substrate drops into a side of light source is to use high-precision mold, the Fresnel lira of heated pressure moulding and constitute Fresnel transmission template forms diffusion photosphere along channel(l)ed plate face and the diffuse reflection of processing last layer, extinction at a side heat pressure forming semi-cylindrical of the diffusion light imaging picture of substrate along striped.

3, high definition rear projection screen according to claim 2 is characterized in that: accept the Fresnel transmittance plate of a heated pressure moulding of light source, its lira distance between centers of tracks is 0.33～0.55mm, and the lira groove depth is 0.25～0.30mm.

4, high definition rear projection screen according to claim 2, it is characterized in that: the suitable bar groove of the semicolumn pattern that a side heat pressure forming of diffusion light imaging picture is arranged, its planar alignment spacing 0.25～0.80mm, ditch depth 0.21～0.25mm, semicolumn horizontal angle 2a=158 ± 3 °, angle is 33 ± 2 ° between two ditches.

5, high definition rear projection screen according to claim 1, it is characterized in that: the ellipse lira that a described side of accepting light source distributes with high-precision mold heated pressure uniform in shaping constitutes the transmittance plate face of ellipse lira pattern, and one deck diffuse reflection in the side processing of described diffusion light imaging picture, the diffusion photosphere of extinction are high density diffusion photosphere.

6, high definition rear projection screen according to claim 5 is characterized in that: the ellipse lira pattern of accepting a side of the light source transmittance plate face of lira that evenly distributes, and its lira spacing 0.25～0.55mm, the lira groove depth is 0.18～0.21mm.

7, high definition rear projection screen according to claim 5 is characterized in that: the thickness 0.03～0.05mm of one deck high density diffusion photosphere that the one side of imaging picture adds.

8, according to claim 1 or 2 or 5 described high definition rear projection screens, it is characterized in that: the lira transmission that evenly distributes of screen surface Fresnel transmittance plate form or ellipse is board-like, semicolumn is along bar groove pattern, all adopt stainless steel or aluminum alloy material to become mould through high-precision processing, and with addition of heat, compression system, the precision techniques data of its Mould Machining are equal to the corresponding technical indicator of screen sides face.The specification of mould is 1730 * 1300 * 100mm～3100 * 2100 * 100mm4 kind model.

9, high definition rear projection screen according to claim 2, it is characterized in that: described is to be formed by some vertical little transmissive bodies along the bar groove, at least contain 1818 described little transmissive bodies at the every wide 1000mmm of screen cover, it distributes on the semicolumn rib.

10, high definition rear projection screen according to claim 1 is characterized in that: the specification of described screen is 54 cun, 72 cun, 84 cun, 100 cun, 120 cun or 150 cun.