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1. 发明专利

JPH02116284A THREE-TUBE SYSTEM PROJECTION TELEVISION 失效
公开(公告)号：JPH02116284A
公开(公告)日：1990-04-27
申请号：JP26830788
申请日：1988-10-26
申请人： PIONEER ELECTRONIC CORP
发明人： HASEGAWA SHINICHI
IPC分类号： H04N5/74 , G09F9/00 , H04N9/31
摘要： PURPOSE:To make it unnecessary to manufacture the shape of a coupler frame at every screen size by making constant the angle between the tube surface of a projecting tube and the optical axis an image surface correcting lens, and setting the angle between the tube surface and the optical axis of an image forming lens by means of the angle between the optical axis of the image formation correcting lens and the optical axis of the image forming lens. CONSTITUTION:On a coupler frame 41, an angle theta (a coupler inclining angle) formed by the surface, where a meniscus lens 42 is attached, and the surface, where a tube surface 5a of a projecting tube 5 is stuck, is set at a value determined beforehand. At such a time, the inclining angle of a flange 22 of a barrel supporting part 2, namely, an angle (correction angle) alpha formed by the lens surface of a lens barrel 1 and the lens surface of the meniscus lens 42 is set by regulating the length of a fixed seat 41a formed on the coupler frame 41 by means of cutting. Thus, even when the coupler frame where the coupler inclining angle theta may not correspond to a shine proof angle is used, the coupler in the same shape can be used.

2. 发明专利

JPH0156494B2 失效
公开(公告)号：JPH0156494B2
公开(公告)日：1989-11-30
申请号：JP17265285
申请日：1985-08-06
申请人： PIONEER ELECTRONIC CORP
发明人： HASEGAWA SHINICHI
IPC分类号： C09K5/00 , C09K5/08 , H01J7/26 , H01J29/00 , H01J29/89 , H01J31/10

3. 发明专利

JPS6332503A TEMPERATURE COMPENSATED LENS USING LIQUID LENS 失效
公开(公告)号：JPS6332503A
公开(公告)日：1988-02-12
申请号：JP17533986
申请日：1986-07-25
申请人： PIONEER ELECTRONIC CORP
发明人： HASEGAWA SHINICHI , YOSHIOKA TAKAYUKI
IPC分类号： G02B3/12
摘要： PURPOSE:To obtain the titled lens system capable of withstanding to a temperature change by interposing a liquid lens which has a temperature coefficient of refractive index of a specific value to a space between a convex lens made of a plastic material and a plastic lens or a glass lens. CONSTITUTION:The liquid lens E1 having the negative power is interposed to the space between the convex lens L1 composed of the plastic material and the lens L2. The liquid materials of the lens E1 and a coolant E2 are composed of a liquid or a gel material having temperature coefficient (dn/dT), which denotes the temperature dependency in refractive index and satisfies the formula of -4X10 . And, the lens L2 is composed of the plastic material or the glass. The temperature change of the refractive index of the whole of the integrated lens is compensated by the lens E1, by constituting the assemble of the lens as mentioned above. Thus, at the time of applying the titled lens system to a projection TV, even if the temperature of the lens remarkably changes, the imaging plane of the lens does not move, and the resolution of the image on a screen does not deteriorate, and the image having high quality can be maintained.

4. 发明专利

JPS61159874A REAR PROJECTION TELEVISION 失效
公开(公告)号：JPS61159874A
公开(公告)日：1986-07-19
申请号：JP28151684
申请日：1984-12-29
申请人： PIONEER ELECTRONIC CORP
发明人： HASEGAWA SHINICHI
IPC分类号： H04N5/74 , G03B21/56
摘要： PURPOSE:To attain maximum brightness in dependence upon the angle of the eye viewing the screen by arranging a Fresnel lens placed between a lentiscreen and a projecting lens so as to be movable vertically. CONSTITUTION:The image light projected by a projection tube 1 is projected by way of a projection lens 2 onto a lentiscreen 4 and the thus projected image is viewed from the side opposite to the projection surface by the projection tube 1. The Fresnel lens 3 is placed between the lentiscreesn 4 and the projection lens 2 in the rear projection television and adapted to be movable vertically. For example, when the Fresnel lens 3 is moved up, since the center C of the Fresnel lens 3 is offset from the center C' of the screen, the optical axis is offset from the projection lens 2 upwards at the center C of the screen. Therefore, the brightness becomes maximum with the viewing position of the screen 4 above the center C of the screen to increase the gain.

5. 发明专利

JPH0156495B2 失效
公开(公告)号：JPH0156495B2
公开(公告)日：1989-11-30
申请号：JP17265385
申请日：1985-08-06
申请人： PIONEER ELECTRONIC CORP
发明人： HASEGAWA SHINICHI
IPC分类号： H01J31/10 , B29D99/00 , H01J7/26 , H01J29/00

6. 发明专利

JPH01210942A SCREEN FOR REAR SIDE PROJECTION TYPE PROJECTION TELEVISION 失效
公开(公告)号：JPH01210942A
公开(公告)日：1989-08-24
申请号：JP3536488
申请日：1988-02-19
申请人： PIONEER ELECTRONIC CORP
发明人： HASEGAWA SHINICHI , HANIYU MASAAKI
IPC分类号： G03B21/62 , G03B21/625
摘要： PURPOSE:To widen a visibility angle by diffusing to the horizontal direction by the rows of horizontally positioned lenticulars and diffusing to the vertical direction by the rows of spherically shaped lenticulars vertically positioned to the incident plane of a fresnel sheet. CONSTITUTION:The incident light is diffused in the vertical direction by the refraction effects caused by the first lenticular 1a formed on the incident plane of the fresnel sheet 1. The diffused light is macroscopically focused by a fresnel lens 1b according to the projecting direction of the projection light before it is made incident on the first lenticular 1a. The incident light which is diffused in the vertical direction and macroscopically focused is diffused in the horizontal direction by the refraction effects of a second lenticular 2a formed on the incident plane of the lenticular sheet 2 and projected from a third lenticular 2c positioned between black stripes 2b. Since the incident light is diffused in the vertical and horizontal directions, the visibility angle of a screen is both horizontally and vertically widened.

7. 发明专利

JPS63113403A OPTICAL PRISM AND PROJECTION TV UTILIZING SAID PRISM 失效
公开(公告)号：JPS63113403A
公开(公告)日：1988-05-18
申请号：JP13541487
申请日：1987-05-30
申请人： PIONEER ELECTRONIC CORP
发明人： HASEGAWA SHINICHI
IPC分类号： G02B5/04 , G02B5/28 , H04N9/31
摘要： PURPOSE:To obtain an optical prism which is light in weight, low in cost and large in size by providing plate-shaped members having dichroic mirror faces or total reflection faces and a basic block of a prism or basic block of a liquid material which makes optical coupling with the plate-shaped members. CONSTITUTION:The plate-shaped members 22, 23 such as glass plates are optically coupled to the basic block 21 consisting of glass, plastic or liquid material or the liquid material is filled to a die casting, etc., and the plate-shaped members 22, 23 consisting of the glass plates, etc. are fixed thereto, by which the dichroic mirror using the total reflection faces or vapor deposited dichroic mirror faces of the plate-shaped members 22, 23 is formed. Since the surface accuracy of the total reflection faces or vapor deposited dichroic mirror faces of the respective prisms is determined by the surface accuracy of the glass plates to be attached afterward, the basic block itself is merely required to have the rough accuracy. The use of plastic materials for the basic block 21 is thereby permitted, by which the formation of the prism by plastic moldings and the reduction in the weight and cost of the prisms are permitted.

8. 发明专利

JPH0759092B2 失效
公开(公告)号：JPH0759092B2
公开(公告)日：1995-06-21
申请号：JP17265485
申请日：1985-08-06
申请人： PIONEER ELECTRONIC CORP
发明人： HASEGAWA SHINICHI
IPC分类号： H04N9/31 , H04N17/00

9. 发明专利

JPS6332501A TEMPERATURE COMPENSATED LENS USING LIQUID LENS 失效
公开(公告)号：JPS6332501A
公开(公告)日：1988-02-12
申请号：JP17533786
申请日：1986-07-25
申请人： PIONEER ELECTRONIC CORP
发明人： HASEGAWA SHINICHI , YOSHIOKA TAKAYUKI
IPC分类号： G02B3/12
摘要： PURPOSE:To obtain the titled lens capable of removing changes of refractive index and a focal distance against a temperature change by providing a concave liquid lens having a specific value of temperature coefficient of the refractive index adjacent to a convex lens composed of a plastic material. CONSTITUTION:The concave liquid lens E1 is enclosed in a space between the convex lens L1 having the convex surface on one side and an aspherical lens L2 made of plastic material. The liquid materials of the lens E1 and a coolant E2 are composed of a liquid or a gel material which has the temperature coefficient (dn/dT), which denotes the temperature dependency in refractive index and satisfies the formula of -4X10 . Namely, the focus point and the focal surface are compensated against the temperature change by combining the convex lens and the concave lens. Thus, at the time of applying the titled lens to a projection TV, even if the temperature of the lens does not move, and the resolution of image on a screen does not deteriorate, and the image having high quality can be maintained.

10. 发明专利

JPS6232791A PROJECTION-TYPE TELEVISION 失效
公开(公告)号：JPS6232791A
公开(公告)日：1987-02-12
申请号：JP17265485
申请日：1985-08-06
申请人： PIONEER ELECTRONIC CORP
发明人： HASEGAWA SHINICHI
IPC分类号： H04N9/31 , H04N17/00
摘要： PURPOSE:To improve the reliability of a device and to even brightness at the right and left of a screen by offsetting the lens center line of two, a right and a left, projecting tubes from that of a central projecting tube and coinciding the videos of each projecting tube on a transmission screen. CONSTITUTION:The video rays of light of a green projecting tube 1G, a red projecting tube 1R and a blue projecting tube 1B are focused on lenses 2G, 2R and 2B and after they are reflected twice by two mirrors, being in focus on a transmission screen 5. At such a time, an intersection between the center lines 2Rs and 2Bs of the lenses 2R and 2B and the transmission screen 5 is offset approaching to each side nearer than the intersection between the center line 2Gs of the lens 2G and the transmission screen 5. Thus, the video centers of the projecting tubes 1R and 1B are positioned off the center of a picture plane, however, it is corrected to be almost even by a keystone distortion due to the difference between enlargement factors at the right and left of the picture plane.

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