KR100813733B1 - Lamp assembly and positioning method thereof for Projection system - Google Patents

Abstract

The present invention relates to a lamp assembly of a projection system and a lamp positioning method, and in more detail, to improve the assembly structure and lamp positioning method of the lamp constituting the optical engine, so that the lamp is accurately assembled at the optimum brightness position A position adjustment structure and an adjustment method.

The lamp assembly of the projection system according to the invention comprises a lamp; A lamp bracket coupled to the front surface of the lamp and having a jig coupling end extended to at least one side thereof; The lamp is accommodated therein, the lamp case is in close contact with the lamp bracket; includes, the lamp bracket is coupled to the lamp case, the lamp case is in close contact with the light tunnel housing in the jig device It is characterized in that the position of the lamp is adjusted by.

By the lamp assembly and the lamp position adjustment method of the projection system according to the present invention, there is an effect that the position of the lamp is accurately and simply adjusted.

Projection, optical engine, lamp, jig

Description

Lamp assembly and positioning method about for projection system

1 is an external perspective view of a lamp assembly applied to a conventional projection system.

2 is an operational state diagram showing a position adjustment method of a conventional lamp assembly.

3 is a cross-sectional view schematically showing a projection system according to the spirit of the present invention.

4 is an external perspective view showing an optical engine unit of the projection system according to the spirit of the present invention.

5 is an exploded perspective view of the optical engine unit.

Figure 6 is an external perspective view showing a light tunnel housing to which the lamp assembly of the optical engine according to the spirit of the present invention is coupled.

7 is an external perspective view of a lamp assembly constituting the optical engine unit according to the spirit of the present invention.

8 is an exploded perspective view of the lamp assembly.

9 is a view showing a position adjustment process of the lamp according to the spirit of the present invention.

<Explanation of symbols for the main parts of the drawings>

1: projection system 10: optical engine unit

20: optical engine 21: lamp assembly

22: color wheel assembly 23: light tunnel housing

24: light tunnel assembly 25: condensing lens

26: DMD Assembly 27: Actuator

28: reflector case 29: folding mirror

30: total reflection prism 31: projection lens assembly

The present invention relates to a lamp assembly of a projection system and a lamp positioning method, and in more detail, to improve the assembly structure and lamp positioning method of the lamp constituting the optical engine, so that the lamp is accurately assembled at the optimum brightness position A position adjustment structure and an adjustment method.

Recently, large-screen high-definition display devices have emerged as a major topic, and such large-screen high-definition display devices include CRT (Cathode Ray Tube) televisions, Liquid Crystal Display (LCD) televisions, Projection televisions, and Plasma Display Panel (PDP) televisions. It's coming out.

Among them, the demand for the projection television and the development of technology are actively made as one of the display apparatuses that satisfy the requirements of large screen high definition. The projection television includes a liquid crystal on silicon (LCOS) method using an LCD and a digital light porsessing (DLP) method using a digital micromirror device (DMD).

Recently, low-cost projection TVs using LCDs or DMDs have been in the spotlight. In particular, as the consumer's desire for high quality along with a large screen increases, the demand is increasing year by year, and the trend is particularly popular in the digital television market currently being trial broadcast.

In addition, as the use of computers and presentations using computers have been increasing in recent years, the use of projectors using LCDs or DMDs has also increased.

In general, a projection television adopts a method in which light generated by an optical engine mounted inside a cabinet is reflected and an image is projected on a screen.

In detail, an optical engine using a DMD includes a lamp that emits white light, a color wheel device that separates light emitted from the lamp into red, green, and blue light, an illumination system that collects light passing through the color wheel device; And a DMD for receiving a light passing through the illumination system to create a desired screen, and a projection lens to enlarge and project the image generated from the DMD onto the screen.

1 is an external perspective view of a lamp assembly applied to a conventional projection system, and FIG. 2 is an operating state diagram illustrating a method of adjusting a position of a conventional lamp assembly.

1 and 2, a lamp assembly (a) constituting a conventional projection system includes a lamp case (b), a lamp bracket (c) coupled to a front surface of the lamp case (b), and the lamp. It includes a lamp accommodated inside the case (b).

In detail, the lamp is fixedly coupled to the rear surface of the lamp bracket (c), and the lamp bracket (c) to which the lamp is coupled is coupled to the front opening of the lamp case (b). In addition, the lamp bracket (c) is a fixed position is adjusted by the tightening and loosening operation of the plurality of adjustment screws (d, f). Then, the irradiation direction of the light emitted from the lamp is determined according to the position of the lamp bracket (c). Then, the spring (e) is wound around the outer circumference of the plurality of adjustment screws (d, f), thereby preventing the lamp bracket (c) from shaking.

Here, the operation of the adjusting screw (d, f) is made by a user or an assembling manual.

As described above, by manually adjusting the position of the lamp using a screw, the accuracy of the lamp position is lowered, there is a disadvantage that the internal flow increases. In addition, there is a disadvantage in that the lamp case is shaken or other parts associated with the lamp assembly are affected in the process of assembling the screwdriver. In addition, since the adjustment work is made by the hand of the assembler, there is a disadvantage in that the adjustment time is excessively long and the assembly process is long and the production efficiency is lowered.

The present invention has been proposed to solve the above problems, and to improve the lamp position fixing structure and fixing method, to provide a lamp assembly and a lamp position adjusting method so that the lamp position fixing is made simple and accurate. do.

In addition, an object of the present invention is to provide a lamp assembly and a lamp positioning method capable of increasing the assembly precision of the optical engine by not affecting other components in the lamp positioning process.

Lamp assembly of the projection system according to the present invention for achieving the above object is a lamp; A lamp bracket fixedly coupled to the front of the lamp and having a jig coupling end extended to at least one side thereof; The lamp is accommodated therein, the lamp case is in close contact with the lamp bracket; includes, the lamp bracket is coupled to the lamp case, the lamp case is tightly coupled to the light tunnel housing, the jig coupling The position of the lamp is adjusted by the position adjusting operation of the jig device in the state that the end is bitten by the jig device.

In addition, the lamp position adjustment method of the projection system according to the present invention comprises the steps of the assembly of the lamp and the lamp bracket is coupled to the lamp case; The lamp case is fixedly coupled to the light tunnel housing; A step in which the jig coupling end of the lamp bracket is bitten and fixed to the holder of the jig device; The holder is adjusted up and down or left and right, the step of adjusting the position of the lamp bracket is included.

By the above configuration, there is an effect that the lamp constituting the projection system is accurately and easily fixed at the optimum brightness position.

 Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the spirit of the present invention is not limited to the embodiments presented, and other embodiments included within the scope of other inventive inventions or the scope of the present invention can be easily made by adding, changing, or deleting other elements. I can suggest.

3 is a cross-sectional view schematically showing a projection system according to the spirit of the present invention.

Referring to FIG. 3, the projection system 1 according to the present invention includes a cabinet 2 forming an external appearance, a screen 4 mounted on the front surface of the cabinet 2, and an optical seat mounted on a lower end of the cabinet 2. An engine unit 10 and a rearview mirror 3 mounted to the inner circumferential surface of the cabinet 2 to reflect the image emitted from the optical engine unit 10 onto the screen 4 are included.

In detail, the image screen formed and projected by the optical engine unit 10 is reflected by the rearview mirror 30. The reflected image is extended and projected onto the screen 4 so that the image screen is recognized by the user.

4 is an external perspective view showing an optical engine unit of the projection system according to the spirit of the present invention, Figure 5 is an exploded perspective view of the optical engine unit.

4 and 5, the optical engine unit 10 according to the present invention includes a base 11, an optical engine 20 seated on the base 11, and an outer portion of the optical engine 20. Various parts to be mounted are included.

The optical engine 20 according to the present invention includes a lamp assembly 21 in which white light is generated by a high voltage, and a color wheel assembly 22 in which unpolarized light emitted from the lamp assembly 21 is separated into red, green, and blue. ), A light tunnel assembly 24 for uniformizing red, green, and blue light while passing through the color wheel assembly 22, and light uniformly passing through the light tunnel assembly 24 Condensing lens (25) collected, a folding mirror (29) for reflecting light passing through the condensing lens (25), and the light reflected by the folding mirror (29) again The total reflection prism 30 to reflect, the light reflected by the total reflection prism 30 gathers to form image information, and the number of pixels of light reflected from the DMD assembly 26 is doubled ( Doubling) It is included in the projection lens assembly 31 to expand the light passing through the actuator 27 and the actuator 27. Here, the lamp assembly 21 is called a lamp system, and the assembly of the color wheel assembly 22, the light tunnel assembly 24 and the condensing lens 25 is called an illumination system. The aggregate of the folding mirror 29 and the total reflection prism 30 is called a reflectometer, and the aggregate of the reflectometer and the DMD assembly 26 is called a synthetic system.

In more detail, the lamp assembly 21 includes a lamp 212 that emits white light and a lamp case 211 that protects the lamp 212. In addition, the reflector of the lamp 212 is curved to have a predetermined curvature, and serves to change the light emitted from the burner of the lamp 212 to be focused at a predetermined distance, that is, a focal length.

In addition, the color wheel assembly 22 may be divided into red, green, and blue color wheels (also referred to as 221: RGB color filters) and rotate at high speed. A motor 223 driving the wheel 221 and a heat dissipation fin 222 for cooling the motor 223.

In detail, light emitted from the lamp 212 by the reflector of the lamp 212 is focused on the surface of the color wheel 221. The light focused on the color wheel 221 passes through the color wheel 221 and takes on any one color of red, green, and blue. Here, the color wheel 221 has a disk shape having a predetermined diameter, the disk is divided into red, green, blue. Accordingly, the unpolarized light reflected by the reflector has one of red, blue, and green colors due to the color of the color wheel located at the moment of condensing.

In addition, the color wheel assembly 22 and the light tunnel assembly 24 are housed inside the light tunnel housing 23.

In addition, the light tunnel assembly 24 is also called a rod lens, and serves to uniformly make colored light passing through the color wheel 221.

In detail, the light tunnel assembly 24 is formed by joining four small, long rectangular bar mirrors facing each other. The light passing through the color wheel assembly 22 is diffusely reflected while passing through the light tunnel, so that the brightness distribution is uniform.

In addition, the condensing lens 25 performs a function of condensing red, green, and blue light uniformly while passing through the light tunnel assembly 24 to the DMD elements constituting the DMD assembly 26. do.

The total reflection prism 30 may also be referred to as a total internal reflection (TIR) prism, and a prism having a large refractive index and a prism having a relatively small refractive index are bonded to each other. The light irradiated from the condensing lens 25 is totally reflected or transmitted according to the incident angle due to the difference in refractive index.

In detail, each object has its own refractive index, and the difference in refractive index determines the critical angle at which light is totally reflected or transmitted.

Therefore, light incident at an angle greater than or equal to a critical angle is totally reflected by the total reflection prism 30, and light incident at an angle smaller than or equal to a critical angle passes through the total reflection prism 30.

In addition, the DMD assembly 26 includes a DMD panel (not shown) and a driver board in which the DMD panel is accommodated. In detail, the driver board is a device for controlling the driving of the ballast and the color wheel or controlling the image.

On the other hand, the DMD panel is designed such that the same amount of fine mirrors as the resolution of the display is arranged so as to have a one-to-one correspondence with the screen.

In detail, the DMD panel determines whether the red, green, and blue light transmitted through the total reflection prism 30 is emitted toward the screen or discarded out of the screen. The DMD panel is mounted in a complementary metal oxide semiconductor (CMOS) memory and driven by a signal transmitted from the CMOS memory.

In more detail, the micromirror constituting the DMD panel is manufactured in the form of a fine diamond-shaped pixel having a width of 16 μm, and tilted by ± 10 degrees according to a signal transmitted from the CMOS, such that the total reflection prism 30 The light passing through is reflected toward the screen or thrown out of the screen.

In addition, the actuator 27 is disposed between the DMD panel and the projection lens assembly 31, and a mirror is mounted at the center portion. In detail, the actuator 27 functions to double the number of pixels of the image signal by refracting and dividing the image signal emitted from the DMD panel by half a frame. Due to the refraction characteristics of the mirror, the resolution of the screen is increased. In addition, the actuator includes a transmission type and a reflection type.

In addition, the projection lens assembly 31 functions to enlarge the image passing through the actuator 27 toward the rearview mirror 3.

In the optical engine 20 having the above-described configuration, the actuator 27, the total reflection prism 30, and the folding mirror 29 are inserted from different surfaces of the reflector case 28 so that one reflectometer may be used. Configure. The color wheel assembly 22 and the light tunnel assembly 24 are accommodated in the light tunnel housing 23 to constitute another assembly. In addition, the lamp assembly 210 forms a separate assembly together with the lamp 212 mounted inside the lamp case 211, and the light tunnel housing 23 is in close contact with the front of the lamp assembly 21. .

As described above, since a plurality of parts form a single assembly, there is an advantage that parts replacement and service are easily performed.

Briefly describing an image forming process performed in the optical engine according to the present invention having the above configuration, the white light emitted from the lamp assembly 21 is converted into colored light while passing through the color wheel assembly 22. . The colored light passing through the color wheel assembly 22 is homogenized while passing through the light tunnel 24, passes through the condensing lens 25, and is then focused on the folding mirror 29. The light collected by the folding mirror 29 is reflected to reach the total reflection prism 30, and is reflected back from the total reflection prism 30 to reach the DMD assembly 26. In the DMD assembly 26, a desired image is formed through selection of light. The image formed by the DMD assembly 26 is reflected to pass through the total reflection prism 30, and then a pixel doubling process is performed while passing through the actuator 27. The image passing through the actuator 27 is incident on the projection lens 31, reflected from the rearview mirror 3, and finally projected onto the screen 4.

  6 is an external perspective view illustrating a light tunnel housing to which a lamp assembly of an optical engine according to the inventive concept is coupled.

6, the lamp assembly 26 is coupled to the front surface of the light tunnel housing 23 constituting the optical engine 20 according to the present invention, and the condensing lens 25 is coupled to the rear surface. In addition, the color wheel assembly 22 is inserted from the side in the light tunnel housing 22. The light tunnel 24 is accommodated in the light tunnel housing 23, and the light tunnel 24 is located immediately after the color wheel assembly 22. In other words, the light tunnel 24 is positioned at the position where the focus of the light emitted from the lamp assembly 26 is formed.

In detail, a lamp case contact surface 231 to which the lamp assembly 21 is in close contact is formed on the front surface of the light tunnel housing 23. Here, the lamp case contact surface 231 is formed to be inclined forward by a predetermined angle from the vertical surface, preferably formed to be inclined about 11 degrees. As a result, the optical path of the light emitted from the lamp assembly 21 is also formed obliquely downward from the horizontal line.

Meanwhile, fastening holes 232 for coupling the lamp case 212 are formed at both edges of the lamp case contact surface 231, and preliminary fastening holes 233 are formed between the fastening holes 232. . In detail, the lamp case 211 is first temporarily fixed to the light tunnel housing 23, and is fully coupled to the light tunnel housing 23 after the position of the lamp is accurately adjusted. In this process, a member (to be described later) for temporarily fixing the lamp case 211 to the light tunnel housing 23 is fitted into the preliminary fastening hole 232.

7 is an external perspective view of a lamp assembly constituting the optical engine unit according to the inventive concept, and FIG. 8 is an exploded perspective view of the lamp assembly.

7 and 8, the optical engine 20 according to the present invention is equipped with a lamp assembly 21 for emitting high power white light.

In detail, the lamp assembly 21 includes a lamp case 211 in which the lamp 212 is accommodated, and a lamp bracket 213 coupled to the front of the lamp 212 to adjust the position of the lamp 212. Included.

In more detail, a circular light passing hole 213a is formed in the center of the lamp bracket 213 so that the light emitted from the lamp 212 is irradiated to the color wheel assembly 23. The jig coupling end 213b extends on one side of the lamp bracket 213, and the jig coupling end 213b protrudes laterally while the lamp bracket 213 is coupled to the lamp case 211. And, both side surfaces of the lamp bracket 213 is formed with a guide groove 213c recessed inward a predetermined depth, the coupling guide portion 218 of the lamp case 211 to be described later in the guide groove 213c. Is fitted.

In addition, a shield plate 214 made of a metal material is inserted forward from the rear of the lamp 212, so that the front surface of the lamp 212 is firmly in close contact with the lamp bracket 213.

In addition, a fastening member 216 having a predetermined length is fitted to both side surfaces of the lamp case 211, and the fastening member 216 is inserted forward from the rear of the lamp case 211, so that the light tunnel housing 23 is provided. It is inserted into the fastening hole 232 formed in the). In addition, a bracket seating portion 215 recesses the upper portion of the lamp case 211 to a predetermined depth so that the upper portion of the lamp bracket 213 is seated.

In addition, the coupling guide portion 218 is formed on both sides of the lamp case 211, the coupling guide portion 218 is fitted into the guide groove 213c formed in the lamp bracket 213.

In detail, a fastening hole 218b is formed on the front surface of the coupling guide part 218 to allow the fastening member 216 to be fitted thereto. In addition, a pretightening protrusion 218a protrudes at a straight distance of the fastening hole 218b, and the pretightening protrusion 218a is fitted into the pretightening hole 233 of the light tunnel housing 23.

More specifically, the lamp bracket 213 is almost exactly coupled to the front surface of the lamp case 211 by the bracket seating part 215, the coupling guide part 218, and the prefastening protrusion 218a. In addition, a fine position adjustment is performed by adjusting the jig coupling end 213b.

In addition, a fixing hole 219 is formed at four corners of the lamp case 211, and a fastening member such as a screw is inserted from the rear of the fixing hole 219 to the front to be inserted and fixed to the lamp bracket 213. do. Here, the screw inserted into the fixing hole 219, the position of the lamp is completely adjusted by the jig device (jig device), and as a last step so that the lamp bracket 213 is completely fixed to the lamp case 211 To be used.

Hereinafter, a process of fixing the position of the lamp 212 will be described.

First, the assembler inserts the shield plate 214 into the lamp 212, and the shield plate 214 is fixed to the back of the lamp bracket 213, so that the lamp 212 is a lamp bracket ( 213 is fixedly coupled to the back.

Second, the combination of the lamp lamp 213 and the lamp 212 on the front of the lamp case 211 to be temporarily fixed.

In detail, the lamp bracket 213 is temporarily fixed to the lamp case 211, as described above, the bracket mounting portion 215, the coupling guide portion 218 and the guide groove 213c mutual coupling Is made by.

Third, the assembly of the lamp bracket 213 and the lamp case 211 is seated on the base 11, and the lamp case 211 is in close contact with the light tunnel housing 23.

In detail, an end portion of the fastening member 216 fitted to the side of the lamp case 211 is inserted into the fastening hole 232 formed in the lamp case contact surface 231 of the light tunnel housing 23. At the same time, the pre-tightening protrusion 218a is inserted into the pre-tightening hole 233 of the lamp case contact surface 231. Here, the front surface of the lamp case 211 forms a shape slightly more protruding than the lamp bracket 213. Therefore, even when the lamp case 211 is completely fixed to the lamp case contact surface 231, the lamp bracket 213 can swing.

Fourth, with the lamp assembly 21 coupled to the light tunnel housing 23, the optical engine unit 10 is allowed to rest on the jig device. Then, the jig coupling end 213b of the lamp bracket 213 is snapped to the jig device, so that the correct position of the lamp bracket 213 is adjusted.

Fifth, when the position adjustment of the lamp bracket 213 by the jig is completed, the lamp bracket 213 is a lamp case (by a fastening member such as a screw inserted through the fixing hole 219 of the lamp case 211). 211).

Sixth, after the position of the lamp is accurately fixed through the above process, the jig device is separated from the lamp bracket 213 and the optical engine unit 10 is separated from the jig device.

Hereinafter, the lamp position adjusting process by the jig device will be described in detail with reference to the accompanying drawings.

9 is a view showing a position adjustment process of the lamp according to the spirit of the present invention.

9, the lamp position adjustment of the optical engine 20 according to the present invention is made by a jig device.

In detail, the optical engine 20 is mounted on the jig device 50 while being coupled to the base 11. Then, the jig engaging end 213b of the lamp bracket 213 is caused to be pinched by the holder 51 of the jig device 50. Here, as described above, the jig coupling end 213b is further protruded to the outside in a state where the lamp bracket 213 is coupled to the lamp case 211.

On the other hand, in the state that the jig engaging end 213b is engaged with the holder 51 of the jig device 50, the grip lever 52 is operated so that the jig engaging end 213b is fixed to the holder 51 without shaking. do. In addition, the holder 51 is moved up and down or left and right by the up and down control unit 53 and the left and right control unit 54.

In detail, the up and down adjustment portion 53 and the left and right adjustment portion 54 is configured in the form of a lever, the holder 51 is moved up and down or left and right when rotated clockwise or counterclockwise. By this structure, the assembler rotates the upper and lower adjusting part 53 and the left and right adjusting part 54 to find a position where the brightness of the lamp 212 is optimal. When the optimal position of the lamp 212 is determined, the fastening member inserted into the fixing hole 219 is tightened so that the lamp bracket 213 is firmly fixed to the front of the lamp case 211.

Here, the lamp case 211 is completely fixed to the light tunnel housing 23 by the fastening member 216. In addition, the lamp bracket 213 is maintained in close contact with the lamp case 211. In addition, the height of the lamp bracket 213 is adjusted by rotating the vertical adjustment unit 54. Thereafter, a fastening member such as a screw is inserted into the fixing hole 219 so that the lamp bracket 213 does not swing from the lamp case 211 even when the holder 51 is separated.

By the position adjustment method as described above, the position of the lamp 212 is more firmly and accurately adjusted, there is an advantage that the position adjustment process is performed in a short time.

By the lamp assembly and the lamp position adjusting method of the projection system according to the present invention having the above configuration, there is an effect that the position of the lamp is accurately and simply adjusted.

In addition, in the process of adjusting the position of the lamp, there is an effect that the assembler can accurately adjust the position of the lamp without affecting other parts associated with the lamp assembly and other accessories such as a lamp case constituting the lamp assembly.

Claims (11)

lamp; A lamp bracket fixedly coupled to the front of the lamp and having a jig coupling end extended to at least one side thereof; And a lamp case accommodating the lamp inside and the lamp bracket in close contact with the front surface thereof. After the lamp bracket is coupled to the lamp case and the lamp case is tightly coupled to the light tunnel housing, the position of the lamp is adjusted by the position adjusting operation of the jig device while the jig coupling end is bitten by the jig device. Lamp assembly of the projection system, characterized in that. The method of claim 1, Positioning of the lamp is the lamp assembly of the projection system, characterized in that the lamp case is fixedly coupled to the light tunnel. The method of claim 1, The lamp assembly of the projection system further comprises a fastening member inserted to the outside of the lamp case, the light tunnel housing. The method of claim 1, And a pre-tightening protrusion protruding from a front surface of the lamp case to fix the lamp case to a right position of the light tunnel housing. The method of claim 1, At least one fixing hole formed at a front portion of the lamp case; And a fastening member penetrating through the fixing hole to fix the lamp bracket to the lamp case after the lamp position adjustment is completed. The method of claim 1, The jig device includes a holder that the jig coupling end is bitten, A vertical adjustment part for adjusting the vertical position of the holder; Lamp assembly of the projection system includes a left and right adjustment for adjusting the left and right position of the holder. The assembly of the lamp and the lamp bracket to the lamp case; The lamp case is fixedly coupled to the light tunnel housing; A step in which the jig coupling end of the lamp bracket is bitten and fixed to the holder of the jig device; And the holder is adjusted vertically or horizontally to adjust the position of the lamp bracket. The method of claim 7, wherein The lamp bracket adjustment method of the projection system, characterized in that the lamp bracket is fixedly coupled to the front of the lamp case by the fastening member when the position adjustment of the lamp bracket is completed. The method of claim 7, wherein The lamp and the lamp bracket assembly is a lamp position adjustment method of the projection system, characterized in that the lamp is fixed to the rear of the bracket by a shield plate. The method of claim 7, wherein The lamp bracket adjusting method of the projection system, characterized in that the lamp bracket is maintained in close contact with the front of the lamp case in the process of adjusting the position of the lamp bracket. The method of claim 7, wherein The holder is a lamp position adjustment method of the projection system, characterized in that for moving up and down or front and rear by the operation of the up and down or left and right adjustment of the jig device.

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