Projection device

Abstract

The invention provides projection equipment. The projection equipment comprises a lens; the digital micromirror device comprises a plurality of digital micromirrors which are arranged in a specific direction; the galvanometer is arranged between the digital micromirror device and the lens and comprises a driving circuit board and a light-transmitting lens, and the driving circuit board drives the light-transmitting lens to swing so that light beams projected by the projection equipment can move in the specific movement direction to improve the image resolution of the projection equipment; wherein the projection equipment adjusts the relative placement angle of the galvanometer and the digital micromirror device by taking the angle difference between the specific arrangement direction and the specific movement direction as a reference, so that the specific movement direction is parallel to the specific arrangement direction.

Description

Technical Field

[0001] This invention relates to the field of projection, and more particularly to a projection device with high resolution. Background Technology

[0002] Please see Figure 1 and Figure 2 , Figure 1 and Figure 2 This is a schematic diagram illustrating the application of digital micromirror devices and galvanometers that differ from previous technologies. Figure 1 The digital micromirror device 10 has multiple digital micromirrors arranged orthogonally, and a galvanometer 12 that conforms to the movement pattern of arrow combination A1 must be selected. Figure 2 The digital micromirror device 14 has multiple digital micromirrors arranged at an angle, and a galvanometer 16 that conforms to the movement pattern of arrow combination A2 must be selected. A digital micromirror device with a specific arrangement pattern can only be used with a galvanometer with a specific movement pattern. For example, galvanometer 12 can only be used in digital micromirror device 10 and cannot be used in digital micromirror device 14.

[0003] Because the development cost of pixel conversion technology (or pixel offset resolution system) is high, the development of a projection device that can apply galvanometers with specific movement modes to digital micromirror devices with multiple arrangement modes is a key development topic for the projector industry. Summary of the Invention

[0004] The purpose of this invention is to provide a high-resolution projection device that can allow a galvanometer with a specific placement pattern to be used in multiple digital micromirror devices by changing the relative placement angle between the galvanometer and the digital micromirror device, thereby reducing development costs and time.

[0005] To achieve the above objectives, the present invention provides a projection device with high resolution, including a lens;

[0006] A digital micromirror device comprising multiple digital micromirrors arranged in a specific orientation; and

[0007] A galvanometer is disposed between the digital micromirror device and the lens, and includes a drive circuit board and a light-transmitting lens. The drive circuit board drives the light-transmitting lens to swing, so that the beam of light projected by the projection device moves at a high frequency along a specific direction of motion to improve the image resolution of the projection device.

[0008] The projection device adjusts the relative placement angle of the galvanometer and the digital micromirror device based on the angular difference between the specific arrangement direction and the specific motion direction, so that the specific motion direction is parallel to the specific arrangement direction.

[0009] Better options also include:

[0010] Color wheel;

[0011] A light source device is used to emit an illumination beam to be directed onto the color wheel; the illumination beam passes through the color wheel, and is then reflected by the digital micromirror device and projected onto the lens through the galvanometer.

[0012] Wherein, the specific arrangement direction is an orthogonal arrangement direction, and the specific movement direction is a rhomboid movement direction; the specific arrangement direction is an oblique arrangement direction, and the specific movement direction is an orthogonal movement direction.

[0013] Preferably, a projection device includes:

[0014] A digital micromirror apparatus comprising multiple orthogonally arranged digital micromirrors; and

[0015] The galvanometer includes a drive circuit board and a light-transmitting lens, and the digital micromirror device is aligned such that the direction of the light-transmitting lens is perpendicular or parallel to the arrangement direction of the plurality of digital micromirrors. The drive circuit board drives the light-transmitting lens to swing, so that the beam of light projected by the projection device moves along the diagonal direction.

[0016] Preferably, the projection device also includes:

[0017] Lens;

[0018] Color wheel; and

[0019] A light source device is used to emit an illumination beam, which passes through the color wheel, and is then reflected by the digital micromirror device and projected onto the lens through the galvanometer to improve the image resolution of the projection device.

[0020] Preferably, the drive circuit board has a long axis and a short axis, and the drive circuit board drives the light-transmitting lens to swing so that the light beam moves in a diamond shape relative to the long axis and / or the short axis.

[0021] Preferably, the lengths of the two diagonals of the light-transmitting lens are greater than the maximum longitudinal dimension and the maximum lateral dimension of the plurality of digital micromirrors, respectively.

[0022] Preferably, a projection device includes:

[0023] A digital micromirror device comprising multiple digital micromirrors arranged obliquely; and

[0024] The galvanometer includes a drive circuit board and a light-transmitting lens. The digital micromirror device is aligned with the direction of the light-transmitting lens perpendicular or parallel to the arrangement direction of the plurality of digital micromirrors. The drive circuit board drives the light-transmitting lens to swing, so that the beam of light projected by the projection device moves along the lateral direction.

[0025] Preferably, the projection device also includes:

[0026] Lens;

[0027] Color wheel; and

[0028] A light source device is used to emit an illumination beam, which passes through the color wheel and is then reflected by the digital micromirror device and projected onto the lens through the galvanometer, thereby improving the image resolution of the projection device.

[0029] Preferably, the drive circuit board has a major axis and a minor axis, and the drive circuit board drives the light-transmitting lens to swing so that the light beam moves orthogonally relative to the major axis and / or the minor axis.

[0030] Preferably, the lengths of the two diagonals of the light-transmitting lens are greater than the maximum longitudinal dimension and the maximum lateral dimension of the plurality of digital micromirrors, respectively.

[0031] Compared with existing technologies, the projection device of the present invention includes a digital micromirror device with multiple digital micromirrors arranged in a specific direction, and a galvanometer including a drive circuit board and a light-transmitting lens. The drive circuit board of the galvanometer drives the light-transmitting lens to oscillate, causing the projected light beam to move at a high frequency along a specific direction of motion, thereby improving the image resolution of the projection device. In order to make the galvanometer with a specific movement mode (i.e., the light-transmitting lens oscillates, causing the projected light beam to move at a high frequency along a specific direction of motion) applicable to digital micromirror devices with multiple arrangement modes (i.e., digital micromirrors with a specific arrangement direction), the projection device of the present invention adjusts the relative placement angle of the galvanometer and the digital micromirror device based on the angular difference between the specific arrangement direction and the specific direction of motion, so that the specific direction of motion is substantially parallel to the specific arrangement direction, thereby reducing development costs and time. Attached Figure Description

[0032] Figure 1 and Figure 2 This is a schematic diagram illustrating the application of digital micromirror devices and galvanometers that differ from previous technologies.

[0033] Figure 3 This is a schematic diagram of the components of a projection device according to an embodiment of the present invention.

[0034] Figure 4 This is a schematic diagram of the digital micromirror device and galvanometer according to the first embodiment of the present invention.

[0035] Figure 5 This is a schematic diagram of the digital micromirror device and galvanometer according to the second embodiment of the present invention.

[0036] Figure 6 This is a schematic diagram of some components of a projection device manufactured in a non-predetermined state according to an embodiment of the present invention.

[0037] Figure 7This is a schematic diagram of some components of a projection device manufactured in a predetermined state according to an embodiment of the present invention. Detailed Implementation

[0038] To provide a further understanding of the purpose, structure, features, and functions of the present invention, detailed descriptions are provided below with reference to specific embodiments.

[0039] Certain terms are used in the specification and claims to refer to specific elements. It will be understood by those skilled in the art that manufacturers may use different names to refer to the same element. This specification and claims do not distinguish elements by differences in name, but rather by differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to".

[0040] Please see Figure 3 , Figure 3 This is a schematic diagram of the components of a projection device 20 according to an embodiment of the present invention. The projection device 20 may include a lens 22, a color wheel 24, a light source device 26, a condenser lens 28, a repeater lens 30, a digital micromirror device 32, and a galvanometer lens 34. The light source device 26 emits an illumination beam that passes through the condenser lens 28 and is projected onto the color wheel 24. The wavelength range of the illumination beam depends on the design requirements of the projection device 20 and will not be described in detail here. The digital micromirror device 32 reflects the illumination beam that passes through the color wheel 24 and the repeater lens 30 and projects it onto the lens 22. The galvanometer lens 34 may be disposed between the digital micromirror device 32 and the lens 22. It moves the projection pixels a specific distance by a small amount of movement, and uses the persistence of vision phenomenon to increase the pixel density to improve the resolution of the projection device 20.

[0041] Please see Figure 4 , Figure 4 This is a schematic diagram of the digital micromirror device 32A and the galvanometer 34A according to a first embodiment of the present invention. The digital micromirror device 32A of the first embodiment includes a plurality of orthogonally arranged digital micromirrors 36. The galvanometer 34A may include a drive circuit board 38 and a light-transmitting lens 40. The movement pattern of the light beam projected by the galvanometer 34A corresponds to the arrow combination B1 (such as the direction of diamond movement). It can be seen that the movement pattern of the light beam provided by the oscillation of the galvanometer 34A in state M1 is conventionally applied to obliquely arranged digital micromirrors (e.g., the same...). Figure 2The digital micromirror device 14 shown cannot be applied to the digital micromirror device 32A. Therefore, the projection device 10 of the present invention uses a drive mechanism (not shown in the figure) provided in the galvanometer 34A, or uses a drive circuit board 38 to adjust the light-transmitting lens 40, or uses other feasible adjustment means to align the light-transmitting lens 40 with its diagonal L1 perpendicular or parallel to the arrangement direction of the plurality of digital micromirrors 36, such as switching from state M1 to state M2. In particular, the present invention determines whether to restrict the galvanometer 34A to state M1 or state M2 according to the arrangement mode of the digital micromirror device 32A before the projection device 20 leaves the factory.

[0042] When the light-transmitting lens 40 of the galvanometer 34A is adjusted and limited to a predetermined angle according to its movement mode and the arrangement of the digital micromirrors 36, the drive circuit board 38 of the galvanometer 34A can drive the light-transmitting lens 40 to swing in a single-axis or dual-axis manner, so that the light beam projected by the digital micromirror device 32A and the galvanometer 34A can move along the movement mode of the arrow combination B1. That is, the light beam projected by the projection device 20 can move along the diagonal L1 or the direction of the arrow combination B1 in state M2, thereby achieving the design purpose of pixel conversion technology (or pixel offset resolution system).

[0043] Furthermore, the drive circuit board 38 may have a major axis AL1 and a minor axis AS1. The drive circuit board 38 is designed to drive the light-transmitting lens 40 to oscillate, so that the projected beam moves in a diamond shape relative to the major axis AL1 and / or the minor axis AS1. Conventional applications can only use it on obliquely arranged digital micromirrors, not on digital micromirror devices 32A with multiple orthogonally arranged digital micromirrors 36. To overcome this deficiency, the projection device 10 of the present invention not only allows the drive circuit board 38 to actuate the light-transmitting lens 40 to perform pixel conversion technology, but also allows the placement angle of the galvanometer 34A relative to the digital micromirror device 32A to be changed in advance. That is, before the projection device 20 leaves the factory, it is restricted to state M2 so that the movement mode of its projected beam corresponds to that of the galvanometer 34A with arrow combination B1. This allows the galvanometer 34A to be used on digital micromirror devices 32A with multiple orthogonally arranged digital micromirrors 36 without the need to configure an additional galvanometer for the digital micromirror device 32A.

[0044] It is worth mentioning that, in the first embodiment, the lengths D1 and D2 of the two diagonals of the light-transmitting lens 40 of the galvanometer 34A can be greater than the maximum longitudinal dimension VS1 and the maximum lateral dimension HS1 of the orthogonally arranged digital micromirrors 36 of the digital micromirror device 32A, so that the light-transmitting lens 40 of the adjusted galvanometer 34A (e.g., switching from state M1 to state M2) can completely cover all the digital micromirrors 36. In the first embodiment, the switching between state M1 and state M2 is preset to a 45-degree angle (e.g., the aforementioned predetermined angle), but the actual application is not limited to this, depending on the arrangement of the digital micromirrors 36 and the movement mode of the beam projected by the galvanometer 34A.

[0045] Please see Figure 5 , Figure 5 This is a schematic diagram of the digital micromirror device 32B and the galvanometer 34B according to a second embodiment of the present invention. The digital micromirror device 32B of the second embodiment may include a plurality of digital micromirrors 42 arranged obliquely. The galvanometer 34B includes a drive circuit board 44 and a light-transmitting lens 46. The movement pattern of the light beam projected by the galvanometer 34B corresponds to the arrow combination B2 (e.g., orthogonal motion direction). It can be seen that the movement pattern of the light beam provided by the oscillation of the galvanometer 34B in state M3 is conventionally applied to orthogonally arranged digital micromirrors (e.g., the same...). Figure 1 The digital micromirror device 10 shown cannot be applied to the digital micromirror device 32B; therefore, the projection device 10 of the present invention uses a drive mechanism (not shown in the figure) provided in the galvanometer 34B, or uses a drive circuit board 44 to adjust the light-transmitting lens 46, or uses other feasible adjustment means to align the light-transmitting lens 46 with its side S1 perpendicular or parallel to the arrangement direction of the plurality of digital micromirrors 42, such as the switching from state M3 to state M4; as mentioned above, this state switching is completed before the projection device 20 leaves the factory.

[0046] When the light-transmitting lens 46 of the galvanometer 34B is adjusted and limited to a predetermined angle according to its movement mode and the arrangement of the digital micromirrors 42 (for example, the switching between state M3 and state M4 can be preset to a 45-degree angle, but the actual application is not limited to this), the drive circuit board 44 of the galvanometer 34B can drive the light-transmitting lens 46 to swing in a single-axis or dual-axis manner, so that the light beam projected by the digital micromirror device 32B and the galvanometer 34B can move along the movement mode of the arrow combination B2. That is, the light beam projected by the projection device 20 can move along the side S1 or the direction of the arrow combination B2 in state M4, thereby achieving the design purpose of pixel conversion technology (or pixel offset resolution system).

[0047] Accordingly, the drive circuit board 44 may have a major axis AL2 and a minor axis AS2. The drive circuit board 44 is designed to drive the light-transmitting lens 46 to oscillate so that the projected beam can move orthogonally relative to the major axis AL2 and / or the minor axis AS2. Conventional applications can only use it on orthogonally arranged digital micromirrors, not on digital micromirror devices 32B with multiple obliquely arranged digital micromirrors 42. To overcome this deficiency, the projection device 10 of the present invention uses the drive circuit board 44 to actuate the light-transmitting lens 46 to perform pixel conversion technology, and pre-changes the placement angle of the galvanometer 34B relative to the digital micromirror device 32B. That is, before the projection device 20 leaves the factory, it is restricted to state M4 so that the movement mode of its projected beam corresponds to that of the arrow combination B2. The galvanometer 34B can be applied to digital micromirror devices 32B with multiple obliquely arranged digital micromirrors 42, without the need to configure an additional galvanometer for the digital micromirror device 32B.

[0048] Please see Figure 6 and Figure 7 , Figure 6 This is a schematic diagram of some components of the projection device 20 manufactured in state M1 according to an embodiment of the present invention. Figure 7 This is a schematic diagram of some components of a projection device 20 fabricated in state M2 according to an embodiment of the present invention. Figure 6 As shown, if the digital micromirror device 32 is paired with a galvanometer 34 in an incorrect state (such as state M1), the corners of the galvanometer 34 will cause structural interference with the prism (such as the relay mirror 30 or other optical elements) of the projection device 20. Therefore, as Figure 7 As shown, the present invention changes the placement angle of the galvanometer 34 relative to the digital micromirror device 32 (e.g., from state M1 to state M2) to create a projection device 20, and restricts the galvanometer 34 to state M2 so that the corners of the galvanometer 34 will not structurally interfere with the prisms (such as the relay mirror 30 or other optical elements) of the projection device 20. This can further shorten the distance between the galvanometer 34 and the prism, achieving the advantages of reducing the overall size of the projection device 20 and improving the illumination efficiency of the projection device 20.

[0049] In summary, the projection device of the present invention includes a digital micromirror device with multiple digital micromirrors arranged in a specific direction, and a galvanometer comprising a drive circuit board and a light-transmitting lens. The drive circuit board of the galvanometer drives the light-transmitting lens to oscillate, causing the projected light beam to move at a high frequency along a specific direction of motion, thereby improving the image resolution of the projection device. To enable the galvanometer with a specific movement mode (i.e., the light-transmitting lens oscillates to cause the projected light beam to move at a high frequency along a specific direction of motion) to be applicable to digital micromirror devices with multiple arrangement modes (i.e., digital micromirrors with a specific arrangement direction), the projection device of the present invention adjusts the relative placement angle of the galvanometer and the digital micromirror device based on the angular difference between the specific arrangement direction and the specific direction of motion, so that the specific direction of motion is substantially parallel to the specific arrangement direction.

[0050] For example, when multiple digital micromirrors are arranged in an orthogonal orientation, and the beam projected by the galvanometer's oscillation moves in a rhomboid direction, such as... Figure 4 As shown in the embodiment, the placement angle of the galvanometer relative to the digital micromirror device can be adjusted before the projection device 20 leaves the factory to switch from state M1 to state M2. When the specific arrangement direction of the multiple digital micromirrors is a rhomboid arrangement, and the specific motion direction of the beam projected by the galvanometer's oscillation is an orthogonal motion direction, such as... Figure 5 As shown in the embodiment, the placement angle of the galvanometer relative to the digital micromirror device can be adjusted before the projection device 20 leaves the factory to switch from state M3 to state M4. Compared with the prior art, the projection device of the present invention can change the relative placement angle between the galvanometer and the digital micromirror device, so that a galvanometer with a specific placement mode can be used in multiple arrangement modes of digital micromirror devices, thereby reducing development costs and time.

[0051] The present invention has been described in the above-described embodiments; however, these embodiments are merely examples for implementing the present invention. It must be noted that the disclosed embodiments do not limit the scope of the present invention. Conversely, any modifications and refinements made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention.

Claims

1. A projection device, characterized in that, Includes: Lens; A digital micromirror device comprising multiple digital micromirrors arranged in a specific orientation; and A galvanometer is disposed between the digital micromirror device and the lens, and includes a drive circuit board and a light-transmitting lens. The drive circuit board drives the light-transmitting lens to swing, so that the beam of light projected by the projection device moves at a high frequency along a specific direction of motion to improve the image resolution of the projection device. The projection device adjusts the relative placement angle of the galvanometer and the digital micromirror device based on the angular difference between the specific arrangement direction and the specific motion direction, so that the specific motion direction is parallel to the specific arrangement direction.

2. The projection device as described in claim 1, characterized in that, Also includes: Color wheel; A light source device is used to emit an illumination beam to be directed onto the color wheel; the illumination beam passes through the color wheel, and is then reflected by the digital micromirror device and projected onto the lens through the galvanometer. Wherein, the specific arrangement direction is an orthogonal arrangement direction, and the specific movement direction is a rhomboid movement direction; the specific arrangement direction is an oblique arrangement direction, and the specific movement direction is an orthogonal movement direction.

3. A projection device, characterized in that, Includes: A digital micromirror apparatus comprising multiple orthogonally arranged digital micromirrors; and The galvanometer includes a drive circuit board and a light-transmitting lens, and the digital micromirror device is aligned such that the direction of the light-transmitting lens is perpendicular or parallel to the arrangement direction of the plurality of digital micromirrors. The drive circuit board drives the light-transmitting lens to swing, so that the beam of light projected by the projection device moves along the diagonal direction.

4. The projection device as described in claim 3, characterized in that, Also includes: Lens; Color wheel; and A light source device is used to emit an illumination beam, which passes through the color wheel, and is then reflected by the digital micromirror device and projected onto the lens through the galvanometer to improve the image resolution of the projection device.

5. The projection device as described in claim 3, characterized in that, The drive circuit board has a long axis and a short axis, and the drive circuit board drives the light-transmitting lens to swing so that the light beam moves in a diamond shape relative to the long axis and / or the short axis.

6. The projection device as described in claim 3, characterized in that, The lengths of the two diagonals of the light-transmitting lens are greater than the maximum longitudinal dimension and the maximum lateral dimension of the multiple digital micromirrors, respectively.

7. A projection device, characterized in that, Includes: A digital micromirror device comprising multiple digital micromirrors arranged obliquely; and The galvanometer includes a drive circuit board and a light-transmitting lens. The digital micromirror device is aligned with the direction of the light-transmitting lens perpendicular or parallel to the arrangement direction of the plurality of digital micromirrors. The drive circuit board drives the light-transmitting lens to swing, so that the beam of light projected by the projection device moves along the lateral direction.

8. The projection device as described in claim 7, characterized in that, Also includes: Lens; Color wheel; and A light source device is used to emit an illumination beam, which passes through the color wheel and is then reflected by the digital micromirror device and projected onto the lens through the galvanometer, thereby improving the image resolution of the projection device.

9. The projection device as described in claim 7, characterized in that, The drive circuit board has a major axis and a minor axis, and the drive circuit board drives the light-transmitting lens to swing so that the light beam moves orthogonally relative to the major axis and / or the minor axis.

10. The projection device as described in claim 7, characterized in that, The lengths of the two diagonals of the light-transmitting lens are greater than the maximum longitudinal dimension and the maximum lateral dimension of the multiple digital micromirrors, respectively.

Images