U.S. patent application number 09/727512 was filed with the patent office on 2002-05-09 for apparatus for compensating engine location for projection monitor.
Invention is credited to Han, Sang-Hyun.
Application Number | 20020054277 09/727512 |
Document ID | / |
Family ID | 19644146 |
Filed Date | 2002-05-09 |
United States Patent
Application |
20020054277 |
Kind Code |
A1 |
Han, Sang-Hyun |
May 9, 2002 |
Apparatus for compensating engine location for projection
monitor
Abstract
The present invention relates to an apparatus for compensating
an engine location for a projection monitor in horizontal and
vertical directions, as well as the angle of the engine, so that it
is possible to accurately compensate the location of the engine.
The apparatus includes a base, a wedge plate fixed on the base, a
mounting plate movably fixed on the wedge plate in horizontal and
vertical directions and having a circular mounting groove on a
center portion of the same, and a stage having a circular support
base at a lower portion of the same. The circular support base is
rotatably mounted in the circular mounting groove of the mounting
plate, an engine is mounted on the stage, and a retainer prevents
escape of the circular support base of the stage from the mounting
groove while facilitating rotation of the support base and fixing
of same at the rotated position. In the present invention, it is
possible to easily compensate the location and angle of the engine
when they are changed due to external vibration or external force
during an assembly operation or transfer of the projection
monitor.
Inventors: |
Han, Sang-Hyun;
(Yongin-City, KR) |
Correspondence
Address: |
ROBERT E. BUSHNELL
1522 K STREET NW
SUITE 300
WASHINGTON
DC
200051202
|
Family ID: |
19644146 |
Appl. No.: |
09/727512 |
Filed: |
December 4, 2000 |
Current U.S.
Class: |
353/122 |
Current CPC
Class: |
G03B 21/005
20130101 |
Class at
Publication: |
353/122 |
International
Class: |
G03B 021/00 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 3, 2000 |
KR |
5413/2000 |
Claims
What is claimed is:
1. An apparatus for compensating a location of an engine for a
projection monitor, said apparatus comprising: a base; a wedge
plate fixed on the base; a mounting plate movably fixed on the
wedge plate for movement in a horizontal direction and a vertical
direction, and having a circular mounting groove on a center
portion of the mounting plate; a stage having a circular support
base at a lower portion of the stage, wherein said circular support
base is rotatably mounted in the mounting groove of the mounting
plate, and an engine is mounted on the stage; and a retainer for
preventing an escape of the circular support base of the stage from
the mounting groove, for implementing a rotation of the circular
support base to a desired position, and for fixing the circular
support base at the desired position.
2. The apparatus of claim 1, wherein said mounting plate is movably
fixed in the horizontal and vertical directions with respect to the
wedge plate by engaging screws engaged to respective screw holes of
the wedge plate corresponding to a horizontal direction elongated
hole having a certain horizontal direction length and a vertical
direction elongated hole having a certain vertical direction
length, said horizontal and vertical direction elongated holes
being formed on the mounting plate.
3. The apparatus of claim 1, wherein said circular support base is
fixed by a plurality of adjusting screws which engage an outer side
surface of the retainer, and said retainer is fixed on the mounting
plate by an engaging screw which engages the mounting plate in a
direction from an upper portion to a lower portion of the
retainer.
4. The apparatus of claim 1, wherein said stage includes a
horizontal member disposed on the circular support base and a
vertical member which is upwardly formed at an end of the
horizontal member for mounting the engine between the horizontal
member and the vertical member.
5. The apparatus of claim 1, wherein the circular support base is
fixed to the desired position by means of screws passing
horizontally through holes in sides of the retainer and pressing
against sides of the circular support base.
6. An apparatus for compensating a location of an engine for a
projection monitor, said apparatus comprising: a lower plate; a
mounting plate fixed on the lower plate and movable in horizontal
and vertical directions and having a circular mounting groove
located on a center portion of the mounting plate; a stage having a
circular support base at a lower portion of the stage, said
circular support base being rotatably mounted in the circular
mounting groove of the mounting plate, and an engine being mounted
on the stage; and a retainer for preventing an escape of the
circular support base from the mounting groove, and including means
for preventing rotation of the circular support base in the
circular mounting groove so as to fix the circular support base at
a desired position.
7. The apparatus of claim 1, further comprising adjustable fixing
means on the mounting plate for adjustably fixing the mounting
plate on the lower plate so that a position of the mounting plate
relative to the lower plate is adjustable in horizontal and
vertical directions.
8. The apparatus of claim 7, wherein said adjustable fixing means
comprises engaging screws which pass vertically through a
horizontal direction elongated hole having a certain horizontal
direction elongation and a vertical direction elongated hole having
a certain vertical direction elongation so as to engage the lower
plate, said horizontal and vertical direction elongated holes being
formed in the mounting plate.
9. The apparatus of claim 6, wherein said retainer is fixed on the
mounting plate by at least one engaging screw which engages the
mounting plate in a direction from above the retainer to below the
retainer.
10. The apparatus of claim 6, wherein said stage includes a
horizontal member disposed on the circular support base, and a
vertical member which is upwardly formed at an end of the
horizontal member for mounting the engine between the horizontal
member and the vertical member.
11. An apparatus for compensating a location of an engine for a
projection monitor, said apparatus comprising: a lower plate; a
mounting plate fixed on the lower plate and movable in horizontal
and vertical directions, and having a circular mounting groove
located on a center portion of the mounting plate; a stage having a
circular support base at a lower portion of the stage, said
circular support base being rotatably mounted in the circular
mounting groove of the mounting plate, and an engine being mounted
on the stage; a retainer for preventing an escape of the circular
support base from the mounting groove; and adjustable fixing means
on the mounting plate for adjustably fixing the mounting plate on
the lower plate so that a position of the mounting plate relative
to the lower plate is adjustable in horizontal and vertical
directions.
12. The apparatus of claim 11, wherein said adjustable fixing means
comprises engaging screws which pass vertically through a
horizontal direction elongated hole having a certain horizontal
direction elongation and a vertical direction elongated hole having
a certain vertical direction elongation so as to engage the lower
plate, said horizontal and vertical direction elongated holes being
formed in the mounting plate.
13. The apparatus of claim 11, wherein said retainer is fixed on
the mounting plate by at least one engaging screw which engages the
mounting plate in a direction from above the retainer to below the
retainer.
14. The apparatus of claim 11, wherein said stage includes a
horizontal member disposed on the circular support base, and a
vertical member which is upwardly formed at an end of the
horizontal member for mounting the engine between the horizontal
member and the vertical member.
15. The apparatus of claim 11, wherein said circular support base
is fixed by a plurality of adjusting screws which engage an outer
side surface of the retainer.
Description
CLAIM OF PRIORITY
[0001] This application makes reference to, incorporates the same
herein, and claims all benefits accruing under 35 U.S.C. .sctn.119
from my application APPARATUS FOR COMPENSATING AN ENGINE LOCATION
OF A PROJECTION MONITOR filed with the Korean Industrial Property
Office on Feb. 3, 2000 and there duly assigned Ser. No.
5413/2000.
BACKGROUND OF THE INVENTION
[0002] 1. Technical Field
[0003] The present invention relates to an apparatus for
compensating an engine location for a projection monitor and, in
particular, to an apparatus which is capable of compensating the
location of the engine for the projection monitor, which projects
an image on a screen of the projection monitor in a horizontal and
vertical direction, and which is capable of compensating an angle
of the engine.
[0004] 2. Description of the Background Art
[0005] Generally, an image display apparatus for projecting optical
energy on a screen is classified into a straight view image display
apparatus and a projection image display apparatus based on the
method for displaying the optical energy on the screen.
[0006] The straight view image display apparatus is directed to a
cathode ray tube (CRT), called a Braun tube. The CRT has a good
display resolution. However, as the size of the screen is
increased, the weight and capacity of the same are increased.
Therefore, the fabrication cost is increased.
[0007] The projection type display apparatus, includes a liquid
crystal display (LCD), a DMD, and an AMA.
[0008] A projection television or projection monitor is an example
of the projection type display apparatus capable of emitting green,
red and blue light, and of projecting the emitted color light on a
screen through a convex lens and a reflection mirror.
[0009] In the projection television or monitor, the location of the
engine may be changed due to an external vibration or an external
force, and thus the light projected on the screen can become
distorted so that a part of the screen is distorted. Therefore, the
projection television or monitor should include an engine location
compensating unit capable of compensating the location of the
engine when the location of the engine is changed.
[0010] However, in the conventional engine location compensating
unit, it is possible to compensate only left and right direction
locations. When the location of the engine is moved in a front and
rear direction or in a radial direction, it is impossible to
compensate the location of the engine.
SUMMARY OF THE INVENTION
[0011] Accordingly, it is an object of the present invention to
provide an apparatus for compensating the location of an engine of
a projection monitor, and which is capable of compensating the
location of an engine in a front and rear direction, of fixing the
location of the same in a left and right direction, and of
adjusting an installation angle of the engine.
[0012] To achieve the above objects, there is provided an apparatus
for compensating the location of an engine for a projection monitor
which includes: a base; a wedge plate fixed on the base; a mounting
plate movably fixed on the wedge plate in a horizontal and vertical
direction, and having a circular mounting groove on a center
portion of the same; and a stage having a circular support base at
a lower portion of the same, wherein the circular support base is
rotatably mounted in the mounting groove of the mounting plate, and
an engine is mounted on the stage. A retainer is also provided for
preventing escape of the support base of the stage from the
mounting groove, for implementing a rotation of the same, and for
fixing the same at a desired position.
[0013] The apparatus for compensating the location of an engine for
a projection monitor according to the present invention includes
the following features.
[0014] In the mounting plate, a horizontal direction elongated hole
having a certain horizontal direction length and a vertical
direction elongated hole having a certain vertical direction length
are formed, and the screw holes are formed in the wedge plate to
correspond to the above-described elongated holes. The mounting
plate is movably fixed on the wedge plate by an engaging screw
which is engaged to each screw hole corresponding to each elongated
hole through the horizontal direction elongated hole and the
vertical direction elongated hole.
[0015] The retainer is ring-shaped and includes a plurality of
adjusting holes and a plurality of through holes on the outer
surface and upper surface, and it fixes the support base of the
stage by means of the adjusting screw engaged through the adjusting
hole. The retainer is fixed on the mounting plate by the engaging
screw engaged to the screw hole of the mounting plate, and the
support base of the stage is fixed on the mounting plate.
[0016] The stage includes a horizontal member on the support base,
and a vertical member which is upwardly formed at an end of the
horizontal member for thereby mounting the engine between the
horizontal member and the vertical member.
BRIEF DESCRIPTION OF THE DRAWINGS
[0017] A more complete appreciation of the invention, and many of
the attendant advantages, thereof, will be readily apparent as the
same becomes better understood by reference to the following
detailed description when considered in conjunction with the
accompanying drawings in which like reference symbols indicate the
same or similar components, and wherein:
[0018] FIG. 1 is an exploded perspective view illustrating a
projection monitor having an engine location compensating unit for
a projection monitor;
[0019] FIG. 2 is an exploded perspective view illustrating an
engine location compensating unit for a projection monitor;
[0020] FIG. 3 is a perspective view illustrating a projection
monitor having an engine location compensating apparatus for a
projection monitor according to the present invention;
[0021] FIG. 4 is an exploded perspective view illustrating a
projection monitor having an engine location compensating apparatus
for a projection monitor according to the present invention;
[0022] FIG. 5 is a schematic cross-sectional view illustrating an
image projection way for a projection monitor having an engine
location compensating apparatus for a projection monitor according
to the present invention;
[0023] FIG. 6 is an exploded perspective view illustrating an
engine location compensating apparatus for a projection monitor
according to the present invention;
[0024] FIG. 7 is a side view illustrating an engine location
compensating apparatus for a projection monitor according to the
present invention; and
[0025] FIG. 8 is a plan view illustrating an engine location
compensating apparatus for a projection monitor according to the
present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0026] The construction of an engine location compensating
apparatus for a projection monitor according to the present
invention will be explained with reference to the accompanying
drawings.
[0027] FIG. 1 is an exploded perspective view illustrating the
inner structure of a projection monitor.
[0028] As shown therein, a projection monitor 1 includes a front
casing 2, a rear casing 3 engaged with a rear surface of the front
casing 2 to form a sealed space therebetween, an engine 6 for
projecting a display image by guiding a light based on an input of
an electrical display signal, first and second reflection mirrors 4
and 5, respectively, for guiding the light onto a screen by
changing a light axis of a display image projected by the engine 6,
and a screen 2a for displaying thereon a display image projected by
the engine 6.
[0029] The projection monitor 1 described above is capable of
projecting a display image projected by the engine 6 on a rear
surface of the screen 2a by changing a light axis based on the
first and second reflection mirrors 4 and 5, respectively, for
thereby displaying, on a front surface of screen 2a, an electrical
display signal inputted into the engine 6.
[0030] In the projection monitor 1, the location of the engine 6
may be changed due to an external vibration or an external force.
If the location of the engine 6 (which is capable of changing an
electrical display signal into a display image) is changed, the
light projected onto screen 2a may be distorted, so that a part of
the display on screen 2a is distorted. Therefore, the projection
monitor 1 needs an engine location compensating unit capable of
compensating the location of the engine 6 in the case where the
location of the engine 6 is changed.
[0031] FIG. 2 is an enlarged perspective view illustrating an
engine location compensating unit.
[0032] As shown therein, the engine 6 is integrally fixed on a
plate 7 by a fixing bolt 8, and the plate 7 is fixed on a
compensating plate 9. The compensating plate 9 includes a plurality
of holes 10, each having a certain curved portion at a certain
portion thereof. The plate 9 is fixed on a base 12 by an engaging
screw 11 engaged to the base 12 through the holes 10.
[0033] In the above arrangement, when compensating the location of
the engine 6, the engaging screw 11 is loosened, and the
compensating plate 9 is released. Next, the engine 6 is rotated in
the left and right directions to thereby compensate the location of
same, and then the engaging screw 11 is engaged to the base 12
through the holes 10 of the compensating plate 9 to thereby fix the
compensating plate 9 to the base 12, so that it is possible to
compensate the location of the engine 6.
[0034] However, in the above-described engine location compensating
unit, it is possible to compensate locations only in the left and
right directions. In the case where the location of the engine 6 is
moved in a front or rear direction, or in a radial direction, it is
impossible to compensate the location of the engine 6.
[0035] FIG. 3 is a perspective view illustrating a projection
monitor having an engine location compensating apparatus for a
projection monitor according to the present invention, FIG. 4 is an
exploded perspective view illustrating an inner structure of a
projection monitor having an engine location compensating apparatus
for a projection monitor according to the present invention, and
FIG. 5 is a schematic cross-sectional view illustrating an image
projection way for a projection monitor having an engine location
compensating apparatus for a projection monitor according to the
present invention.
[0036] As shown in FIGS. 3 thru 5, a projection monitor 20 includes
a chassis structure formed of a front casing 21 and a rear casing
22 engaged at a rear surface of the front casing 21, an engine unit
30 capable of projecting a display image by controlling an optical
ray of light based on an input of an electrical display signal, a
screen 26 for implementing a display image projected by the engine
unit 30 as a certain image, and first, second and third reflection
mirrors 23, 24 and 25, respectively, for guiding a display image
projected by the engine unit 30 onto the screen 26 by changing the
optical axis of the same.
[0037] As shown in FIG. 5, in the projection monitor 20, an engine
100 of the engine unit 30 of FIG. 4 generates a display image when
an electrical display signal is inputted to thereby project a
display image, and the first, second and third reflection mirrors
23, 24 and 25, respectively, change the optical axis and project on
a rear surface of the screen 26 so that an electrical signal
inputted into the engine unit 30 is displayed on a front surface of
the screen 26.
[0038] In the projection monitor 20, the engine unit 30 is capable
of generating a display image based on an electrical display
signal, and is a component which affects the quality of the display
image. Therefore, if the location of the engine 100 of the engine
unit 30 is changed by an external vibration or external force, the
light projected from the engine unit 100 onto the screen is
distorted, so that the image on the screen is also distorted. In
the apparatus for compensating an engine location for a projection
monitor, in order to prevent a screen distortion phenomenon when
the location of the engine 100 is changed, it is possible to
compensate the changed location of the engine. In the present
invention, as shown in FIG. 5, the engine 100 is fixed on the rear
casing 22.
[0039] FIG. 6 is an exploded perspective view illustrating an
engine location compensating apparatus for a projection monitor
according to the present invention, FIG. 7 is a side view
illustrating an engine location compensating apparatus for a
projection monitor according to the present invention, and FIG. 8
is a plan view illustrating an engine location compensating
apparatus for a projection monitor according to the present
invention.
[0040] As shown therein, the engine location compensating apparatus
40 for the projection monitor 10 includes a base 50 installed at a
lower portion of the rear casing 22 and at a certain slanted angle,
a wedge plate 60 mounted on and movably engaged with the base 50, a
circular mounting plate 70 movably fixed on an upper portion of the
wedge plate 60 in front, rear, left and right directions, and
having a mounting groove 72 on the upper surface of the same, a
retainer 80 rotatably mounted in the mounting groove 72, and a
stage 90 which is rotatably fixed on the retainer 80 for mounting
the engine 100.
[0041] The base 50 is fixed on a lower portion of the rear casing
22, and forms a lower base structure of the engine location
compensating apparatus according to the present invention. Base 50
is capable of fixing other components with respect to the rear
casing 22, and includes an upper surface which is slanted at a
certain angle and a screw hole 52 at both sides of the same.
[0042] The wedge plate 60 is fixed on the upper surface of the base
51, includes a screw hole 62 at both sides, and is fixed on base 51
as the engaging screw 63 is engaged with the screw hole formed on
the base 50 through the screw hole 62. In addition, the wedge plate
60 fixes the mounting plate 70.
[0043] The mounting plate 70 is a square-shaped plate having a
circular mounting groove 72 formed on an upper center portion of
the same. Mounting plate 70 is movably fixed on the wedge plate 60.
Namely, the mounting plate 70 includes a horizontal direction
elongated hole 74 at both front corner portions and a vertical
direction elongated hole 73. Mounting plate 70 is engaged to screw
holes 65 and 64 formed in the wedge plate 60 so that the engaging
screws 78 and 75 correspond to the elongated holes 74 and 73, and
so that the mounting plate 70 is fixed on the wedge plate 60. In
particular, the mounting plate 70 is movable in a horizontal and
vertical direction and by a certain distance with respect to the
engaging screws 78 and 75 because the elongated holes 74 and 73
have a certain distance with respect to the engaging screws 78 and
75, respectively. Therefore, the mounting plate 70 is moved to a
certain position in a horizontal or vertical direction by loosening
the engaging screws 78 and 75, and the engaging screws 78 and 75
are tightened to thereby adjust and fix the position of the
mounting plate 70. A support base 91 of the stage 90 is mounted in
the mounting groove 72 of the mounting plate 70.
[0044] The retainer 80 is fixed on the mounting plate 70, enables
rotation of the stage 90, and has the shape of a circular ring. The
retainer 80 includes a plurality of through holes 81 corresponding
to the screw holes 71 formed in the mounting plate 70, and is fixed
on the mounting plate 70 by means of the engaging screw 84 engaged
to the screw hole 71 of the mounting plate 70 through each through
hole 81. In addition, a plurality of adjusting holes 82 are formed
along an outer portion of retainer 80. The adjusting screw 83
passes through the adjusting hole 82 and pushes against an outer
portion of the support base 91 of the stage 90 inserted into the
retainer 80 so that the stage 90 is fixed to a certain position
after rotation.
[0045] The stage 90 is an L-shaped fixing plate which includes a
horizontal member 92, a vertical member 93 vertically extending
from a rear end of the horizontal member 92, and a circular support
base 91 integral with respect to a lower portion of the horizontal
member 92. The engine 100 is mounted between the horizontal member
92 and the vertical member 93. Therefore, the stage 90 fixes the
engine 100 in such a manner that the support base 91 is inserted
into the retainer 80 and is fixed by the adjusting screw 83.
[0046] In the engine location compensating apparatus 40 according
to the present invention, the engine 100 is fixed with respect to
the rear casing 22, the mounting plate 70 is fixed movably in a
horizontal or vertical direction with respect to the wedge plate
60, and the stage 90 is rotated with respect to the retainer 80 and
is fixed. Thereafter, the engine 100 is fixed so that the engine
100 is movable in a horizontal and vertical direction, and the
rotation angle of the same is adjustable. The compensation of the
location of the engine according to the present invention will be
explained as follows.
[0047] When the engine 100 is installed at a certain deviated
position, and the display image of the screen 26 is distorted in a
left or right direction, the engaging screw 78 of the horizontal
direction elongated hole 74 is loosened, and the mounting plate 70
is moved, and then the engine 100 is positioned at a portion in
which the image is displayed on a center portion of the screen 26.
Thereafter, the engaging screw 78 is tightened, and then the
mounting plate 70 is fixed, so that it is possible to prevent a
distortion phenomenon in the left and right directions with respect
to the screen 26.
[0048] In addition, when the engine 100 is deviated in a front or
rear direction, since the focus of the screen is not adjusted, the
image is not clear. In this case, the engaging screw 75 in the
vertical direction elongated hole 73 is loosened, and the engine
100 is moved in the vertical direction so that the focus of the
image on the screen 26 becomes clear. Thereafter, the engaging
screw 75 is engaged with and fixed on the portion for thereby
implementing a clear image.
[0049] In order to compensate the left and right direction angles
of the engine 100, the adjusting screw 83 of the outer surface of
the retainer 80 is loosened, and the stage 90 is rotated in a
circumferential direction, and then the adjusting screw 83 is
engaged, and the stage 90 is re-fixed, so that it is possible to
compensate the location of the engine by adjusting the left and
right direction angles of the engine 100.
[0050] As described above, in the apparatus for compensating the
location of the engine for a projection monitor according to the
present invention, it is possible to adjust the location of the
engine in the left and right directions and adjust the angle of the
engine, so that it is possible to easily compensate the location or
angle of the engine when the location and angle of the engine is
changed by an external vibration or external force during an
assembling operation or transfer of the system.
[0051] As the present invention may be embodied in several forms
without departing from the spirit or essential characteristics
thereof, it should also be understood that the above-described
embodiments are not limited by any of the details of the foregoing
description, unless otherwise specified, but rather should be
construed broadly within its spirit and scope as defined in the
appended claims, and therefore all changes and modifications that
fall within the metes and bounds of the claims, or equivalences of
such metes and bounds are therefore intended to be embraced by the
appended claims.
* * * * *