TW434435B - Projection television lens assembly - Google Patents

Abstract

A projection television lens system having a device that distorts for telescopically adjusting an A/B assembly, the tubular member that carries the A and B lens elements within a focus mount of a projection television lens system. Additionally, at one end of the lens, there is provided a fixed mounting site, i.e. a mounting site which is fixed in position with respect to the CRT 9 assemble. A device is then provided which connects the fixed mounting site to the tubular member. The thermal and structural characteristics of the device are selected so that the device itself distorts in response to temperature changes and thereby moves the A and B lens elements toward or away from the C element in response to respectively, increased or decreased ambient temperature. In the most preferred embodiment, the fixed mounting site is on the focus mount at the image side of the lens assembly. The tube, carrying the A/B elements and mounted within the focus mount, is connected to the focus mount by a polymer bar which, at one end, is fixed to the focus mount and, at the other end, is fixed to A/B assembly. Thereby, when the ambient temperature increases, the bar expands and moves the A/B assembly only axially and not rotationally toward the C element. The material of the bar and its dimensions are selected such that, in response to exposure to increased ambient temperature, the A/B assembly is moved toward the C element by an amount appropriate to maintain focus or substantially compensate for the distortion of the C element.

Description

4 34 4 3 5

BACKGROUND OF THE INVENTION: Projection television (PTV) is well known. A typical projection television or projector includes two cathode-ray tubes (CRTs) with the main colors red, blue and green. Each CRT is a projection lens assembly that includes a set of multiple lens elements. Overall, the function of the lens assembly is to enlarge the image appearing on the CRT panel and then project it onto a video screen, which is much larger than the CRT panel. In projection television, the images appearing on the CRT are significantly enlarged. For example, CRTs commonly used in projection televisions have a diameter of 3-6 inches. However, the screen on which the image is projected is usually 48 to 60 inches or larger. Due to this amplification, it is important that each CRT produce a maximum brightness or light intensity. Indeed, the need for light intensity is one reason to use three separate CRTs in projection television. To maximize light intensity, each CRT operates at maximum power to produce maximum light output at the panel. Operating at maximum power and each CRT-related lens system produces considerable temperature changes. Indeed, in commercialized and home-used projection TVs, the internal temperature of the unit can usually increase to 40 ° C to 50 ° C and some will increase to 90 ° C. As a result, the lens system will be exposed to high temperatures, which will cause distortion in the lens system, which will cause expansion of the system components due to heat. A particularly troublesome twist known to those skilled in the art is the thermally induced twist of one or more lens elements. Therefore, after a few hours of operation, the image displayed on the screen becomes blurred due to out of focus. A prior art projection television 10 is shown in FIG. As shown therein, the CRT 9 has a panel 11. The lens assembly 11 is connected to the CRT 9 and contains the first lens element 18. As shown in the figure, the first lens element 18 is usually expressed as " c

v 434435 5. Description of the invention (2) '~~~-pieces, or "field flatter", and having a uniform thickness, which is usually made of plastic and is convex to the CRT 9 and to the lens assembly 丨The image side of 〇 is concave. The periphery of the first lens element 18 is sandwiched between the connector 19 and the focusing frame 12, which is then fixed to the CRT 9 °. The space defined by the first lens element a panel 11 and the connector 19 is usually filled with liquid. And define a concave lens, whose function is a field flatter. In addition, the liquid function contained in the space 13 is for conducting heat from the CRT 9 to the connector 19, which usually provides a set of multiple fins (not shown) to maximize the transfer of heat to the outside atmosphere. Further considering the lens assembly 10 shown in Fig. 1, the lens elements 14 15, 16 and 17 are all fixed to a tubular member 20, which is called a lens chamber, and is received in a tubular member 12 called a focusing frame. The lens element 14 is commonly referred to as a so-called "A element". Similarly, the lens elements 15 and 16 are commonly referred to as " B elements'. The transparent element 17 can be classified as a so-called " B / C corrector " or the lens element 17 can form a group with the lens elements 15 and 16 and be called 1'B element '. As shown in FIG. 1, the lens element The distances between 1, 4, 15, 16, and 17 are fixed because they are respectively fixed to the tubular member 20. However, the distance between the lens element 17 and the lens element 18 can be moved toward or by axially moving the lens chamber 20. Adjust away from the first lens element 18. When the projection television is assembled, this axial movement will effectively focus the image on the screen. After the image is focused, the axial position of the tubular member 20 is fixed relative to the focusing frame.丨 2. The device to achieve this adjustment is described in US Patent No. 5 2 7 6 5 5 5. The lens element 10 is focused and the lens chamber 20 is fixed relative to the focusing frame 12. The entire unit is supplied to the customer. As before It shows that the temperature will increase when the lens system is operated. As shown in Figure 1, the lens element 6 is usually in the system.

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= Has the largest positive magnification. For this reason, it is expected that the components made of glass will produce two temperatures, and the minimum distortion will be generated when the temperature is increased. However, for comparison, the lens element 18 with a smaller negative magnification is composed of plastic and For quite thin. Therefore, when the temperature is increased, the first lens element 18 will distort and as the lens curvature radius increases, the distortion becomes significant and thus the negative magnification of the element decreases. Without correction, the distortion of the first lens element 18 will make the image out of focus. Although U.S. Patent No. 4 2 6 790 provides a mechanism to compensate for the distortion of the lens, the present invention cannot be focused manually after reassembly and can only be automatically focused after assembly is completed. In addition, the lens assembly of U.S. Patent No. 4,525,745 discloses the use of a movable portion to focus the lens assembly, in which a cylindrical plunger is connected to the lens focus adjustment assembly to rotate within the cylinder, thereby moving the lens housing axially, Therefore, auto-focusing is achieved through rotation and axial movement. Another object of the present invention is to provide a projection television lens assembly operation and manufacturing method, which can provide automatic compensation for lens distortion caused by a temperature change of the assembly. As a result, the system focal length can be maintained and out-of-focus or substantially reduced. Another object of the present invention is the operation and manufacturing method of the PTV lens assembly, so that the lens distortion can be adjusted automatically. Summary of the invention: According to a preferred embodiment of the present invention, the tubular member carrying the A element and the B element in the projection television lens system is not fixed in the longitudinal direction during the operation of the system. Therefore, a fixed mounting position is provided at one end of the lens, namely

C: \ Program Files \ Patent \ p456. Ptd Page 9 4 344 3 5 V. Description of the invention (4) Installation position fixed relative to the CRT 9 component proper position d The device provided is connected to the fitting in a fixed installation position member. Selecting the thermal and structural characteristics of the device will allow the device itself to twist in response to temperature changes and therefore only move axially, with A and B lens elements and non-rotating toward or away from the c element in response to increasing or decreasing atmospheric temperature. In the most preferred embodiment, the 'fixed mounting position' is located on a focusing frame on the image side of the lens assembly. The pipe carrying A and 8 components is known as the A / B module installed in the focusing frame, and connected to the focusing frame by a polymer strip, which is fixed to the focusing frame at one end and to the A / β component at the other end . So room temperature? When high, the strip will expand and the A / B assembly will only move axially and will not rotate against the fC element. The length of the material and the size selection will reflect the atmospheric temperature. The amount of movement of the afA / B module against the c element will maintain focus or compensate for distortion of the element. Due to the nature of the tubular member connected to the tubular member carrying the A / β module, the tubular member only moves axially and does not rotate. Brief description of the drawings: FIG. 1 (FIG. 1) is a schematic cross-sectional view of a prior art lens assembly. The second figure (FIG. 2) is a schematic sectional view of a preferred embodiment of the lens assembly of the present invention. The second figure (Figure 3) is a perspective view of the connector. The fourth figure (Figure 4) is a perspective exploded view of the focusing frame and the lens chamber. The fifth figure (figure 5) is a perspective exploded view of one half of the lens chamber and the other half of the matching bar. Figure 6A (Figure 6a) is a perspective view of the hot strip of the preferred embodiment of the present invention

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A perspective view of the bottom of the hot bar shown. The preferred embodiment of the hot strip assembly is shown in Figure 6B (Figure 6b) as Figure 6a, Figure 6C (Figure 6c), and Figure 6D (Figure 6d) as shown in Figure 6c. The perspective view of the thermal strip assembly (E) (Figure 6e) is a cross-sectional side view of the thermal strip shown in FIG. The seventh figure (FIG. 7) is a perspective view of the lens chamber used in the 偻 | v & Brother III < FIG. 8 (FIG. 8) is a partial perspective view of the lens chamber assembly of the present invention. Description of the symbols of the drawing elements: cathode ray tube (CRT) 9; projection television 10; panel n; focusing frame 1 2; space 1 3; lens element 1 4, 1 5, 16 1 7 1 8; lens element New position 18 a; connector 19; tubular member 20; lens assembly 2 3; lens element 26, 28; focus frame 30; connector 32; tubular member 36; lens chamber 36; latch 40; strip 41 ; Latch 43; Strip assembly 44; Column member 54; Rib 61; Radial flange 6 2; Flange upper side 6 2 a; Cylindrical object 6 2 c; Core core 6 3; Projection member 6 4; Thermal length Strip assembly 6 6; strip 6 7; aperture 6 8; bore hole 6 9; gasket 71; connector 100; aperture 10; back plate 10; opening 1 06; shelf 10 8; Aperture 11 〇; Pillar 11 4; Aperture 1 16; Focusing frame 1 2 0; Pin 122; Bracket 126; Aperture 128; Peripheral surface 129; Lens chamber 130; Lens chamber half 130a, 130b; Support rib 132; Open Hole 133; Fine slit 137; Lens assembly 140; Fine slit 142; Web plate 144; Hole 147; Web plate

C: \ Program Files \ Patent \ p456.ptd Page 11 434435 V. Description of the invention (6) 149; screw 180; screw 189; washer 181; nut 182. Detailed description: Referring to Fig. 2, it shows the concept of the present invention. As shown therein, the glass lens assembly 23 includes a CRT 9 ° connector 32 having a panel 11 fixed to the CRT 9. The first lens element 18 is fixed in the lens assembly 23 by sandwiching its periphery between the coupler 32 and the focusing frame 30. The tubular member 36 is also referred to as a lens chamber, and is installed in the focusing frame 30. The lens chamber 36 carries two lens elements, an a-element 26 and a B-element 28. Preferably, the B element 28 provides most of the positive magnification to the glass lens and is made of glass. The A element is preferably made of plastic, has at least one aspherical surface, and corrects aperture-related aberrations. The lens elements 26 and 28 are fixedly mounted in the focusing frame 30. The lens chamber 36 has two pins 40 connected thereto and is located 180 ° apart from each other on the lens chamber 36. As shown in FIG. 2, the pins 40 extend outwardly and are connected to one end of the strip 41. The other end of each strip is connected to the latch 43, which extends radially outward through the focusing frame 30. If the lens assembly 23 shown in Fig. 2 is located in a projection television, as explained previously, the temperature in the PTV will increase when the television is used. Therefore, when the temperature of the first lens element or the C element 18 increases, as shown in FIG. 2, it will be deformed to a new position 18a. Therefore, the magnification of the lens unit composed of the fluid contained in the connector 32, the CRT 9 panel 11, the C element 18, and the space 13 will be reduced. At the same time, when the overflow is raised, the two bars 41 will expand. Since the pin 4 3 is fixed to the focal point frame 30 by being connected to the connector 32 and fixed to the CRT 9, the strip 41 expands and moves the lens chamber toward the C element 18. Coefficient of thermal expansion of strip 4 1 and strip

C: \ ProgramFiles \ Patent \ p456.ptd Page 12 ^ 4 344 3 5 V. Description of the invention (7) The selection of the length of 4 1 will make the strip 4 1 expand, and the lens chamber moves to keep the lens elements 28 and 1 8 The gap is fixed to maintain focus. When the PTV unit containing the lens assembly 23 is closed, the temperature shown in FIG. 2 and the outside temperature of the lens assembly 23 are reduced and cooling occurs, and the first c element 18 returns to the original position. Similarly, when cooled, the strip 4 is retracted to its original position and the lens chamber assembly 23 returns to its original position. Therefore, when the unit is turned off again, the focus is in place. The fabrication of the specific components forming the lens assembly 23 shown in Fig. 2 and the implementation of the most preferred embodiment of the present invention will now be described. The image side of the connector 100 shown in Figure 3 is designed to connect to the CRT 9 in a conventional manner well known in the industry. The connector 100 is usually made of a mold plastic material. Generally, the bracket surrounds the CRT 9 and contains a holding bracket. When secured to CRT 9, the bolts extend through each bracket and through each hole in each corner of the connector 100. The connector 丨 〇 〇 therefore installed and sealed to the CRT 9 surface. As shown in FIG. 3, the image side of the connector is terminated by a circular opening 106, which includes a frame 108. The connector 100 includes an aperture 110, and when the final lens assembly 23 is completed, it can Use as a connector 丨 〇〇 to fill the connection liquid. The O-ring is located on the rack 108. The periphery of the circular opening 106 is an upright post 114, and each post has a pin receiving hole 116 opposite to it in its end. The connector shown in FIG. 3 (6 has six of the pillars 114. The latch bearing aperture 116 is the alignment aperture and its function will be explained below. At each corner of the connector 100 is an upright web. 149, which terminates at the backplane 104 with an aperture 102 therein. ^ When the connector 100 is mounted on the CRT 9, the backplane 104 is coplanar and the backplane faces the lens assembly 23 image.イ ϋ ^ Ι ICircle C: \ Prograni Fi 1 es \ Patent \ p456. Ptd Page 13 4 344 3 5 V. Description of the invention (8), referring to FIG. 4, shown in it is the focusing frame 120, which is similar to the link The device 100 is usually made of a castable polymer. Six alignment pins extend from the object side or the bottom side of the focusing frame 12 2. There are four mounting brackets around the object-side focusing frame 丨 2 〇 Frames 126, each bracket containing an aperture 128. In addition, the focusing frame 12 has a web 144 on the upper side, which has a focusing slit 142. ^ In assembly operation, the connector shown in Figure 3 is fixed to the CRT 9 as before Therefore, the C element or the first lens element 18 shown in FIG. 2 is located at the top of the connector 100 and the lens in the opening 106. The convex portion extends downward, that is, it is located in the circular opening 106 and rests on the O-ring, and it is supported by the bracket 108. Therefore, the focusing frame 12 shown in FIG. An alignment pin bears within the aperture and matches the connector 100, so that the focusing frame and the connector 100 are hermetically sealed. Therefore, the peripheral surface 129 of the connector 100 matches the periphery of the C component. The c element was previously placed in the circular opening 106 of the coupler 100. As a result of the matching operation, each mounting bracket 126 on the focusing frame 120 and the connector 100 are opposite to the back plate. 104 becomes a face-to-face connection and each aperture 1 28 in each mounting bracket 26 is aligned with the opposite back plate 104. The screw inspection passes each aperture 102 and aperture 128, and thus the focusing frame 120 is fixed to the connector 100 surface. Figure 4 also shows the lens chamber 130. In more detail, the lens chamber is composed of two lens chamber halves 130a and 13Ob, which will form the lens chamber 130 when matched. The lens chamber halves 130a and 130b are formed by Bolts are fixed into the opening 133 and locked together, the opening 1 33 is located in the half of the lens chamber, as shown in Fig. 5. In the lens chamber assembly, the lenses contained therein are, for example, group A or b lens elements 26 and 28 placed inside the first lens chamber half.

C: \ Prograra Files \ Patent \ p456. Ptd page 14 4 344 3 5 V. Description of the invention (9) The periphery of the lens is received in a groove, which is cast in the inside of the first lens chamber half. When the lens is placed in this position, the matching lens chamber half is connected to the first lens chamber half and the two lens chambers are locked together by fixing four screws into the 130 opening 133 of the person. The lens chamber 130 shown in Fig. 4 contains components which collectively contain the preferred embodiment of the present invention. Referring to the lens chamber half 130a shown in FIG. 5, it has a vertical support rib 132 as a part of the lens chamber half 130a and is located in the middle part of the lens lattice half 130a. The support rib 132 includes a column member 54 at the end and a concave elliptical slit 1 37 at the other end < = expandable or thermal strip assembly 44 (shown in Fig. 6c) on the top of the support rib 132. The thermal strip k-piece 66 includes a strip 67 and a protruding member 64. In particular, the thermal strip has a column receiving hole 69, which corresponds to the shape of the column member 54, and a fixed column member 54 is shown in Figs. 6-6c. Furthermore, the heat strip 67 has a larger aperture 68, and its size will fixedly receive the protruding member 64 (shown in FIG. 6 (: center). The heat strip 67 has two cymbals 71, which are located in the column bearing hole. Between the hole 69 and the hole 68. As shown in FIG. 6c, the protruding member 64 has a cylindrical object 62c which has an inner core 63 passing through it. The cylindrical object 62c has an inward flange 6 at its end and The cylindrical object 62c is integrated. The radial flange 62 has two strips 61 on the upper side 62a of the flange 62, wherein each of the supporting ribs 61 is separated from each other by about 180 degrees. The protruding member 64 is fixed to the aperture through the bottom of the thermal strip 67 μ inner door, so that the ribs 61 on the upper side 62a of the flange 6 and the thin slits on the bottom of the relatively hot strip 67 (shown in Fig. 6b) match, thereby fixing the projecting members 64 to the i, ..., The inside of the aperture 6 7 of the food strip 6 7 is shown in FIGS. 6 d and 6 e. One end of the hot strip assembly 6 6 is anchored to the pillar member of the lens chamber half 130a through the ridge receiving hole 69, which has a protruding surface.

C: \ Program Files \ Patent \ p456.ptd Page 15 V. Description of the invention (10) The end of the member 64 is located in the concave oval slit 137 of the lens chamber half 130a. The bottom side of the flange 62 is in frictional engagement with the lens chamber half 130a, where the flange 62 of the projection member 64 is fixed in the concave oval slit 137. Therefore, when the lens-to-half piece 130a is engaged with the matching lens chamber half-moon 130b, one end of the thermal strip π extends longitudinally toward the image side of the lens chamber 30 and is fixed to the lens chamber 130 via the column member 54. Similarly, the lens chamber half 130b has a thermal strip assembly 66 and the two lens chamber halves are locked together by using an aperture 1 3 3 screw, as shown in FIGS. 5 and 7. The component unit shown in FIG. 4 performs the following processing. The focusing frame 丨 2 is mounted on the connector 100 in the manner described above, and the lens chamber 13 () is inserted into the focusing frame 120 as shown by arrow 140 in Fig. 4. The lens chamber 130 is located in the focusing frame 120 so that the protruding member 64 is located underneath and fixed to the web 44 and the focusing slit 142. The cylindrical object 62c of the projection member 64 extends outwardly through the focusing slit 142 in the web 144. Insert the fixing screw 180 and penetrate the protruding surface member 6 4 inside the core 6 6 through the outside of the focusing frame 1 2 0, as shown in FIG. 8. When the CRT 9 is activated, the lens chamber 130 can be rotated and since each focusing slit 42 is placed obliquely, the rotation of the lens chamber 130 will cause longitudinal movement and thus focus. When focusing is achieved, the fixing screw 180 is tightened, so that the flange 62 of the protruding member 6 4 upper side 6 2 a will be in bearing contact with the bottom surface of the web surrounding the focusing slit 14 2 and frictionally engaged. In addition, the two pads 71 are in frictional contact with the inner surface of the focal point holder 120. When the connection is reached, it is understood that the lens chamber 130 is held in the focusing frame 120 by a thermal strip assembly, which is anchored to one end of the lens chamber 130 by a pillar member and the convex member at the other end. 64 anchored to the other end. When the hot strip 67 is affected by the atmospheric temperature change in the machine

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As a result of the expansion, heat is directed towards the end of the hot strip 67, which is then fixed to the lens chamber 13 via the pillar structure. Therefore, the lens chamber 13 can only move axially in the C lens element gimbal. 8 The detailed structure of the previously described device components and structures is shown in 圊 5 一 — ° 囷 囷 5, showing only half of the lens chamber 30; for clarity, other = omitted. The matching parts of the two openings connecting the other half of the lens chamber are clearly shown in FIG. 5. It is also shown that the supporting rib 132 and the column member 54 1 are cast as a part D of the lens chamber half 13a on the side of the lens chamber half u0a, and provide a concave oval slit 132. The raised face member 64 is shown to penetrate to the inside of 130 and extends radially outward through the recessed slits 1 3 7. A more detailed perspective view of the raised member is shown in Figure 6c. Referring again to FIG. 5, the shape of the trenched holes 137 is important. In particular, as previously explained, when the lens assembly 1 40 is completed and the device is used, in response to an increase in ambient temperature, the lens chamber 130 moves axially toward the crt 9. In order to be able to produce this movement, it is necessary to provide elliptical or stretched undercuts 3-7. In other words, the elliptical object 62c of the protruding member 64 is fixed to the focusing frame 12 and Q cannot move. Therefore, the flange 62 of the protruding member 64 is a portion held in the concave elliptical slit 1 37, which can Move axially within the concave oval slits 1 3 7. In order to ensure that the lens chamber 130 can be moved axially, it is necessary to provide a stretching concave slit 1 3 7. Referring to Fig. 7, a lens chamber 130 is shown having a thermal strip assembly 66 connected thereto. As shown in Figure 7, and as previously explained, the post member extends through the post receiving aperture 69, which is provided at the end of the hot strip 67. The size of the post member 54 and the hole diameter 69 will result in a tight frictional connection between the post member 54 and the hole 69. In addition

4 34 d 3 5 V. Description of the invention (12) The upper part of the cylindrical object 62c at one end extends through the larger aperture 68 ° of the thermal strip 67. Therefore, when the lens chamber 13 is located in the focusing frame 12, as shown in Fig. 8 The lens grid 1 30 is connected to the focusing frame 1 2 0 through the expansion strip 67 and the projection member 64, which is fixed in the center of the projection member 64 by the fixing screw 1 89 and uses a washer 181 and a nut 182. The lens assembly 14 is tightened to be fixed to the focusing frame 120. Therefore, the lens chamber 130 can be moved axially in response to changes in atmospheric temperature during operation, as shown in FIG. 2. In a preferred embodiment of the present invention, the heat strip 67 is made of high-density polyethylene. As previously explained, given the expected temperature change and the expected distortion of the C element 18, the choice of material for the thermal strip 67 will cause the focus frame 120 to move sufficiently to compensate for the distortion of the C element 18 and the distortion generated by the element. Changes in lens magnification. Those skilled in the art will be able to do the calculations needed to determine the twist of the C element 18 and to change the magnification. Once the change in the magnification of the lens characteristics of the lens chamber 130 is determined, those skilled in the art can determine the range in which the lens chamber 130 moves toward the CRT 9. Determine this distance and try to determine the known expected temperature change, the required coefficient of thermal expansion, and the length of the thermal strip 67. Therefore, after the projection television assembly 14 of the present invention is assembled together, the lens assembly 140 is initially manually focused and simultaneously rotates the lens grid 130 toward the focusing frame 120 and moves the lens chamber 13 axially to the focusing frame 120 manually. Adjust the focus position. After the focus position is adjusted manually, it is locked in the proper position by the fixed screw 1 80, and the screw locks the position of the focus frame 130 against the focus frame 20, which will prevent the focus frame 130 from rotating further within the focus frame 120. Due to the locked manual adjustment of the focusing position, the lens assembly can automatically

C: \ Program Files \ Patent \ p456. Ptd page 18 4 344 3 5 V. Description of the invention (13) Focus in response to changes in the ambient gas temperature of the lens assembly 140 ° In particular, the lens assembly 丨 4 ambient temperature changes The thermal strip 67 is caused to expand, which only causes the lens to 130 to move axially toward the focusing frame 120 and does not cause rotation. Although the present invention has been described in detail with specific embodiments, and those skilled in the art can make various changes, it will not depart from the present invention as defined by the following claims.

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Claims (1)

4 34 4 3 5 VI. Patent application scope 1. A projection television assembly, comprising: a) a first housing, which is used as an imaging device for installation and includes at least a first lens; b) at least one other lens is located at a second In the shell and-the side; and up to 蒂 m 觐 c) at least one elongate member, one end of which is fixedly connected to the first shell and the other end of which is fixedly connected to the second shell, the long member is located in the first: shell Between the outer casing, the long member causes at least one lens to move axially toward and away from the first lens and does not rotate in response to changes in the temperature of the peripheral gas exposed by the lens assembly. The component of the scope item 1, in which the imaging device is shaded. 3. According to the first aspect of the scope of the patent application, φ ^. S, the lens is on the side of the first lens screen and 1 small Λ Rugan Cong. Unaddressed ^ m ^ ^ And) The distance between the two other lenses is fixed. 4. The components according to item 1 of the scope of the patent application .., a, M, in which the elongated member includes two apertures separated from each other, one hole 栌 ± .. IWZ only extends from the second shell The pillar member is fixed and the other aperture is fixed to the protruding member. The protruding member is fixed at one end to the oval recessed middle buckle of the second shell, and the other end of the large member is fixedly fixed. Connected to the first housing. C: \ Prograra Files \ Patent \ p456.ptd 20th stomach 1 According to the scope of the patent application No. 1 ^ ^ ^ ^ ^ Λ I component, wherein the protruding member has an internal through hole control adjacent to the first shell ^ ρ & 丄 * * Outside of the Syrian Square-to bear the set screws at the ends. 6 · According to item 5 of the scope of the patent application, ^ ^ ^ ^ aL ^, ία t < module, where the lens contains one of the two other lenses mentioned and 蚩, Α ^ brother and close to the A lens, which produces a transparent lens r 434435 VI. Patent application scope The positive value of the lens component is more than half. According to the sixth item of the patent application, the first lens and the near-side lens are plastic lenses, and most of the lenses that generate the lens component with a large positive value are glass lenses. 8 · A projection television assembly comprising: a) a CRT; 'b) a connector assembly fixed to the CRT; a plastic mirror which is concave to the CRT and fixed to the connector; d) a first officer E) the second batten, which is located in the first tube; and, f) at least one lens, which is mounted in the second tube; and = the extension bar, whose-end is connected to The second pipe fitting and the door of the second pipe fitting are formed by the first member / piece. The long member is placed on the periphery of the first pipe fitting and the second component: The length of the body: Λ bar and the coefficient of thermal expansion will be selected to promote the second pipe: i Expansion or contraction only in the axial direction, only the axial movement of the first tube and no rotation to change the optical characteristics caused by the lens change to 9 == the component around item 8 of which at least- The position where the two pipes are connected is closer. The position on the screen side of the piece is longer than the long piece connected to the component of the: Tui Yi / 1; ΐ: 1 ia around the 9th component, wherein the second tube includes two lenses' which are firmly located in the second tube. y package according to lambda application: the component of the eighth range of the 10th item, in which the elongated member is further advanced-the package is separated from each other by an aperture, one aperture pair of the surface extending from the lens tube C: \ Program Fi1es \ Patent \ p456 ptd page 21 * 4 34 4 3 5 6. Scope of patent application Columns, pieces, and other-Apertures Convex surface: ellipse whose end is slidably fixed to the lens tube: ': surface = component other-end fixed Ground is connected to the first tube. A component of a lower slit midplane system component that includes a) a lens tube 'that is sized and suitable to be accommodated in the first tube. B) at least two lens fixtures are located in the lens tube and the strip member is fixedly connected to The first tube is at one end of the long member = further comprising two apertures spaced apart from each other, one aperture pair is fixed by the pendant member * and the other aperture is fixed to the protruding surface member, and one end of the dog surface member is slidably fixed In the elliptical concave slit of the lens tube, and the other end of the protruding member is fixedly connected to the first tube, the middle and long member automatically adjusts the focus of the projection television system by adjusting the axial movement of the lens tube and No rotation in response to changes in ambient gas temperature during the operation of the projection television lens group. 13. The assembly according to item 12 of the scope of the patent application, wherein the protruding member has, at the other end, an inner through hole and adjacent to the first pipe member to receive the fixing wire. 14. The component according to item 13 of the scope of patent application, which further comprises a second strip member, which is adapted to be fixedly connected to the lens tube in the same manner. As mentioned, at least one strip member is located opposite the lens tube— About i degrees to the side. 1 5. —A method for adjusting the focus of a projection television lens assembly, the assembly includes a CRT, a connector connected to the CRT, is located in a focusing frame and contains at least two C: \ Prograra Files \ Patent \ p456.ptd 4 34 4 3 5 々The lens chamber assembly of the patent-applied lens is located near the convex lens of the CRT. The method includes the following steps: the original manual method is axial and rotating Orientation adjusts the projection television lens assembly to a manually adjusted focusing position; and successively automatically adjusts the manual adjustment focusing position only in the axial direction and without rotation in response to changes in ambient temperature of the projection lens assembly during operation. 1 6. The method according to item 15 of the scope of patent application, wherein the automatic adjustment step includes a step of locking the manual adjustment of the focus position. C: \ Program Files \ Patent \ p456. Ptd Page 23