KR950007483A - Cathode ray tube projection TV - Google Patents

Cathode ray tube projection TV Download PDF

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Publication number
KR950007483A
KR950007483A KR1019930017573A KR930017573A KR950007483A KR 950007483 A KR950007483 A KR 950007483A KR 1019930017573 A KR1019930017573 A KR 1019930017573A KR 930017573 A KR930017573 A KR 930017573A KR 950007483 A KR950007483 A KR 950007483A
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KR
South Korea
Prior art keywords
lens
ray tube
cathode ray
projection television
tube type
Prior art date
Application number
KR1019930017573A
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Korean (ko)
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KR0147571B1 (en
Inventor
김동하
Original Assignee
김광호
삼성전자 주식회사
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Priority to KR1019930017573A priority Critical patent/KR0147571B1/en
Publication of KR950007483A publication Critical patent/KR950007483A/en
Application granted granted Critical
Publication of KR0147571B1 publication Critical patent/KR0147571B1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/72—Modifying the appearance of television pictures by optical filters or diffusing screens

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Lenses (AREA)

Abstract

이 발명은 음극선관 방식의 프로젝션 텔레비젼에 관한 것으로서, 음극선관의 전면에 수개의 렌즈그룹으로 구성된 프로젝션 렌즈를 설치하고 상기 렌즈그룹중 하나의 렌즈그룹에 프리즘을 포함하도록 설치함으로써 프로젝션 텔레비젼의 하단에 음극선관과 프로젝션 렌즈를 거의 수평으로 위치시켜 광축의 경사가 없으며, 텔레비젼의 높이를 줄여 보다 콘팩트한 테이블 탑형 프로젝션 텔레비젼의 실현이 이루어지도록 한 것이다.The present invention relates to a cathode ray tube type projection television, comprising: a projection lens composed of several lens groups in front of the cathode ray tube and a prism in one lens group of the lens groups; The tube and projection lens are positioned almost horizontally so that there is no tilt of the optical axis, and the height of the television is reduced to realize a more compact table top projection television.

Description

음극선관 방식의 프로젝션 텔레비젼Cathode ray tube projection TV

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제3도는 이 발명의 요부인 프로젝션 렌즈의 상세도,3 is a detailed view of a projection lens which is the main part of the present invention,

제4도의 (가),(나)는 이 발명의 요부인 프로젝션 렌즈에서 제3렌즈그룹의 다른 실시예를 나타낸 상세도,(A) and (b) of FIG. 4 are detailed views showing another embodiment of the third lens group in the projection lens which is the main part of the present invention;

제5도는 이 발명의 요부인 프로젝션 렌즈의 다른 실시예를 나타낸 상세도이다.5 is a detailed view showing another embodiment of the projection lens which is the main part of the present invention.

Claims (10)

음극선관의 전면에 프로젝션 렌즈가 설치되고 상기 프로젝션 렌즈로 발생되는 광축이 반사미러를 통해 한번 반사되어 스크린에 투사되는 음극선관 방식의 프로젝션 텔레비젼에 있어서, 상기 프로젝션 렌즈가 음극선관의 전면에 근접되어 제1 내지 제3렌즈그룹으로 구성되며, 상기 렌즈그룹중 하나의 렌즈그룹에 반사형 프리즘이 포함되어 있는 음극선관 방식의 프로젝션 텔레비젼.In a cathode ray tube type projection television in which a projection lens is installed on a front surface of a cathode ray tube and an optical axis generated by the projection lens is reflected through a reflection mirror to be projected on a screen, the projection lens is disposed close to the front side of the cathode ray tube. A cathode ray tube type projection television comprising first to third lens groups, wherein one of the lens groups includes a reflective prism. 제1항에 있어서, 상기 제1렌즈그룹은 음극선관의 정면판이 정면에 접촉장착되고 선단에 “C”자형의 비구면 렌즈가 장착된 냉각 커플링의 내부에 냉각용 냉매가 채워져 상기 정면판에 접촉설치되어 있고, 상기 제2렌즈그룹은 낮은 분산재질로 되고 강한 양의 파워를 가진 바이콘벡스형 렌즈가 설치되고 그 일측에 초생달형의 비구면렌즈를 설치하며, 상기 제3렌즈그룹은 제2렌즈그룹의 비구면렌즈에 또 하나의 얇은 비구면렌즈, 양의 파워를 갖는 플라노 콘벡스형 렌즈가 접촉되어 설치되고 상기 플라노 콘벡스형 렌즈의 입사면에 반사형 프리즘이 접촉설치되고 반사형 프리즘의 출사면에 얇은 비구면렌즈가 설치되어 있는 음극선관 방식의 프로젝션 텔레비젼.According to claim 1, wherein the first lens group is in contact with the front plate is filled with a cooling refrigerant inside the cooling coupling in which the front plate of the cathode ray tube is mounted on the front face and the "C" shaped aspherical lens is mounted on the front end. The second lens group has a low dispersion material and a biconvex lens having a strong amount of power, and a crescent-shaped aspherical lens is installed on one side thereof, and the third lens group has a second lens. Another thin aspherical lens, a plano convex lens with positive power, is installed in contact with the aspherical lens of the group, and a reflective prism is placed in contact with the incident surface of the plano convex lens. Cathode ray tube projection television with a thin aspherical lens on the exit surface. 제2항에 있어서, 상기 제1 내지 제3렌즈그룹의 비구면렌즈는, 적어도 한 면이 비구면으로 되어 있는 음극선관 방식의 프로젝션 텔레비젼.The projection television set according to claim 2, wherein at least one surface of the aspherical lens of the first to third lens groups is aspheric. 제2항에 있어서, 상기 반사형 프리즘이, 입,출사면은 구면이고 반사면은 평면으로 되어 있는 음극선관 방식의 프로젝션 텔레비젼.The projection television according to claim 2, wherein the reflective prism has a spherical entrance and exit surface and a reflecting surface is planar. 제4항에 있어서, 상기 반사형 프리즘이, 입,출사면 및 반사면이 모두 평면으로 되어 있는 음극선관 방식의 프로젝션 텔레비젼.5. The cathode ray tube type projection television according to claim 4, wherein the reflection prism has a flat entrance, an exit surface, and a reflection surface. 제2항에 있어서, 상기 제2렌즈그룹의 바이콘벡스형 렌즈가, 복수파장에 대한 페츠발섬의 변화를 최소화하기 위해 분산수가 55.0 이상으로 되어 있는 음극선관 방식의 프로젝션 텔레비젼.3. The cathode ray tube type projection television according to claim 2, wherein the biconvex lens of the second lens group has a dispersion number of 55.0 or more in order to minimize the change of Petzval's island for multiple wavelengths. 제2항에 있어서, 상기 제2렌즈그룹의 바이콘벡스형 렌즈가, 제1,3렌즈그룹의 어느 일측에 선택적으로 인접해 설치되어 있는 음극선관 방식의 프로젝션 텔레비젼.3. A cathode ray tube type projection television according to claim 2, wherein the biconvex lens of said second lens group is selectively provided adjacent to either side of said first and third lens groups. 제1항에 있어서, 상기 제2,3렌즈그룹사이에, 낮은 분산재질로 된 강한 양의 파워를 갖는 바이콘벡스형 렌즈와 높은 분산재질로 된 강한 음의 파워를 갖는 플라노 콘케이브형 렌즈가 한 쌍으로 구성된 색수차 보정용의 제4렌즈그룹이 설치되어 있는 음극선관 방식의 프로젝션 텔레비젼.The biconvex lens having a strong positive power made of a low dispersion material and a plano concave lens having a strong negative power made of a high dispersion material between the second and third lens groups. And a cathode ray tube type projection television provided with a pair of fourth lens groups for chromatic aberration correction. 제8항에 있어서, 상기 바이콘벡스형 렌즈가, 제2,3렌즈그룹의 어느 일측에 선택적으로 인접해 설치되어 있는 음극선관 방식의 프로젝션 텔레비젼.9. A cathode ray tube type projection television according to claim 8, wherein said biconvex lens is selectively provided adjacent to either side of said second and third lens groups. 제2항 또는 제3항에 있어서, 상기 비구면렌즈의 표면쌔그가,According to claim 2 or 3, wherein the surface slag of the aspherical lens, +Ar4+Br5+Cr8+Dr10식에 의해 정의되어 있는 음극선관 방식의 프로젝션 텔레비젼, 여기서, R는 곡율, r는 렌즈의 반구경, K는 원추상수, A-D는 비구면게수이다. A cathode ray tube type projection television defined by the formula + Ar 4 + Br 5 + Cr 8 + Dr 10 , where R is the curvature, r is the hemispherical diameter of the lens, K is the cone constant, and AD is the aspheric number. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930017573A 1993-08-31 1993-08-31 Projection t.v. KR0147571B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930017573A KR0147571B1 (en) 1993-08-31 1993-08-31 Projection t.v.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930017573A KR0147571B1 (en) 1993-08-31 1993-08-31 Projection t.v.

Publications (2)

Publication Number Publication Date
KR950007483A true KR950007483A (en) 1995-03-21
KR0147571B1 KR0147571B1 (en) 1998-09-15

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KR1019930017573A KR0147571B1 (en) 1993-08-31 1993-08-31 Projection t.v.

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KR0147571B1 (en) 1998-09-15

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