TWI669001B - Image projection device - Google Patents

Abstract

The invention discloses an image projection device, which comprises: a control module, a first light source module and a second light source module. The first light source module and the second light source module are electrically connected to the control module. The first light source module includes a first driving unit and a first lighting group electrically connected to the first driving unit. The second light source module includes a second driving unit and a second lighting group electrically connected to the second driving unit. The first image signal provided by the control module is transmitted to the first lighting group through the first driving unit, and the second image signal provided by the control module is transmitted to the second lighting group through the second driving unit. . The first projection beam generated by the first illumination group and the second projection beam generated by the second illumination group move in the same direction and are simultaneously projected on the micromirror module. Therefore, the present invention can perform image projection of higher image quality within a predetermined time period, thereby improving image quality.

Description

 Image projection device  

The present invention relates to an image projection device, and more particularly to an image projection device for improving image quality.

The projection method of the existing image projection device, especially the laser image projection device, projects a laser beam onto the micromirror module per unit time, and scans the beam line by line according to the fixed direction of the line or the column. Go to the micromirror module to present a complete image.

However, there is still room for improvement in the image quality that can be projected by the prior art laser image projection device. Although the speed of light is greater than the resolution recognizable by the human eye, the human eye cannot perceive the time difference of each projection beam. However, the image beam projected by the existing image projection device in a unit time cannot satisfy the high image quality, such as the actual display resolution. The specification is 1920*1080 or higher.

The technical problem to be solved by the present invention is to provide an image projection apparatus for the deficiencies of the prior art, and in particular, a projection apparatus capable of improving image quality.

In order to solve the above technical problem, one of the technical solutions adopted by the present invention is to provide an image projection device including: a control module, a first light source module, and a second light source module. The first light source module is electrically connected to the control module, wherein the first light source module includes a first driving unit and a first lighting group electrically connected to the first driving unit . The second light source module is electrically connected to the control module, wherein the second light source module includes a second driving unit and a second lighting group electrically connected to the second driving unit . The first image signal provided by the control module is transmitted to the first lighting group through the first driving unit, and a second image signal provided by the control module is passed. The second driving unit is transmitted to the second lighting group. The first projection beam generated by the first illumination group and the second projection beam generated by the second illumination group move in the same direction and are synchronously projected on a micromirror module.

In order to solve the above technical problem, another technical solution adopted by the present invention is to provide an image projection device, including: a control module, a first light source module, and a second light source module. The first light source module is electrically connected to the control module, wherein the first light source module includes at least two first driving units and one electrically connected to at least two of the first driving units The first lighting group. The second light source module is electrically connected to the control module, wherein the second light source module includes at least two second driving units and one electrically connected to at least two of the second driving units The second lighting group. a first image signal provided by the control module is transmitted to the first lighting group through at least two of the first driving units, and a second is provided from the control module. The image signal is transmitted to the second lighting group through at least two of the second driving units. The first projection beam generated by the first illumination group and the second projection beam generated by the second illumination group move in the same direction and are synchronously projected on a micromirror module.

In order to solve the above technical problem, another technical solution adopted by the present invention is to provide an image projection apparatus, comprising: a control module and a first light source module. The first light source module is electrically connected to the control module, wherein the first light source module includes at least two first driving units and one electrically connected to at least two of the first driving units The first lighting group.

An advantageous effect of the present invention is that the image projection device provided by the technical solution of the present invention can pass a first projection beam generated by the first illumination group and a second projection generated by the second illumination group. The light beam moves in the same direction and is simultaneously projected onto a micromirror module. Or the first light source module includes at least two first driving units and one is electrically connected to at least two of the first driving units. The technical feature of the first illuminating group enables the present invention to perform image projection of higher quality or higher pixel in a predetermined time, thereby improving image quality.

For a better understanding of the features and technical aspects of the present invention, reference should be made to the accompanying drawings.

D‧‧‧Image projection device

C‧‧‧Control Module

1‧‧‧ first light source module

11, 11a, 11b‧‧‧ first drive unit

13‧‧‧First lighting group

131‧‧‧First red laser source

132‧‧‧First green laser light source

133‧‧‧First blue laser light source

2‧‧‧Second light source module

21, 21a, 21b‧‧‧ second drive unit

23‧‧‧Second lighting group

231‧‧‧Second red laser light source

232‧‧‧Second green laser light source

233‧‧‧Second blue laser light source

3‧‧‧Micromirror module

31‧‧‧ scanning points

S1‧‧‧ first image signal

S2‧‧‧ second image signal

P1‧‧‧First projection beam

P2‧‧‧second projection beam

1 is a functional block diagram of an image projection apparatus according to a first embodiment of the present invention.

2 is a schematic view showing a light beam projection of the image projection device according to the first embodiment of the present invention.

FIG. 3 is a functional block diagram of a video projection apparatus according to a second embodiment of the present invention.

4 is a schematic view showing a light beam projection of an image projection device according to a second embodiment of the present invention.

FIG. 5 is a functional block diagram of a video projection apparatus according to a third embodiment of the present invention.

FIG. 6 is a schematic diagram of beam projection of an image projection apparatus according to a third embodiment of the present invention.

The embodiments of the "image projection device" disclosed in the present invention will be described below by way of specific embodiments, and those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in the specification. The present invention may be carried out or applied in various other specific embodiments, and various modifications and changes can be made without departing from the spirit and scope of the invention. In addition, the drawings of the present invention are merely illustrative and are not intended to be stated in the actual size. The following embodiments will further explain the related technical content of the present invention, but the disclosure is not intended to limit the scope of the present invention.

The invention discloses an image projection device, which comprises a control module and at least one light source module, and each light source module is electrically connected to the control module. Each of the light source modules includes at least one driving unit and a lighting group electrically connected to the at least one driving unit. The image projection device of the present invention can simultaneously project the projection beam generated by each of the illumination modules onto a micromirror module through the arrangement of at least one light source module.

The operation and function of the image projecting device of the present invention will be described in detail below by way of embodiments.

[First Embodiment]

1 and FIG. 2, FIG. 1 is a functional block diagram of a video projection apparatus according to a first embodiment of the present invention, and FIG. 2 is a schematic diagram of a light beam projection of the image projection apparatus according to the first embodiment of the present invention. First, the image projecting device D of the first embodiment of the present invention may include two light source modules. As shown in the above figure, the present embodiment provides an image projection device D, which includes a control module C, a first light source module 1 and a second light source module 2. The control module D is electrically connected to the first light source module 1 and the second light source module 2 respectively.

The control module D can be an integrated circuit module. In this embodiment, the control module D can be an application-specific integrated circuit (ASIC), which is designed to be customized according to the control requirements of the light source module of the image projection device of the present invention. Specifications integrated circuit. The control module D can provide at least one image signal to the light source module.

The first light source module 1 includes a first driving unit 11 and a first lighting group 13 . The first driving unit 11 and the first lighting group 13 are electrically connected to each other. Similarly, the second light source module 2 also includes a second driving unit 21 and a second lighting group 23, and the second driving unit 21 is also electrically connected to the second lighting group 23.

In the embodiment, the control module D provides a first image signal S1 to the first light source module 1 , and the control module D provides a second image signal S2 to the second light source module 2 . In detail, the first image signal S1 provided by the control module D is transmitted to the first lighting group 13 through the first driving unit 11 of the first light source module 1. The first driving unit 11 drives the first lighting group 13 according to the first image signal S1 to cause the first lighting group 13 to generate the first projection beam P1. On the other hand, the control module D provides the second image signal S2 to the second light source module 2. In detail, the second image signal S2 is transmitted to the second light-emitting group 23 through the second driving unit 21 of the second light source module 2. The second driving unit 21 drives the second lighting group 23 according to the second image signal S2, so that the second lighting group 23 generates the second projection beam P2.

In this embodiment, the first driving unit 11 and the second driving unit 21 may be a laser diode driver (LDD). The laser diode driving circuit can drive the lighting group according to the image signal provided by the circuit of the control module to generate the projection beam. In this embodiment, the projected beam is in particular a laser projection beam.

The first lighting group 13 and the second lighting module 23 of the present invention may be RGB laser lighting modules. In detail, the first lighting group 13 can include a first red laser light source 131, a first green laser light source 132, and a first blue laser light source 133. The second illumination group 23 includes a second red laser source 231, a second green laser source 232, and a second blue laser source 233. The first red laser light source 131 and the second red laser light source 231 generate red laser light, and the first green laser light source 132 and the second green laser light source 232 generate blue laser light, the first blue laser light source 133 and The second blue laser source 233 produces green laser light.

In addition, the first lighting group 13 and the second lighting group 23 may include not only one laser light source. In detail, the first lighting group 13 of the present invention may include a first red laser light source 131, two first green laser light sources 132, and a first blue laser light source 133. Alternatively, the first lighting group 13 can include two red laser sources 131, two first green laser sources 132, and a first blue laser source 133. Similarly, the second illuminating group 23 of the present invention may include a second red laser light source 231, two second green laser light sources 232, and a second blue laser light source 233; or a second illuminating group Group 23 can include two second red laser sources 231, two second green laser sources 232, and a second blue laser source 233.

In the above, the first driving unit 11 drives the first lighting group 13 according to the first image signal S1. The first red laser light source 131, the first green laser light source 132, and the first blue laser light source 133 of the first light emitting module 13 are combined according to the first image signal S1 to generate light beams of different light wavelengths. The first projection beam P1. On the other hand, the second red laser light source 231, the second green laser light source 232, and the second blue laser light source 233 of the second light emitting module 23 generate light beams of different light wavelengths according to the second image signal S2. It is integrated into a second projection beam P2.

2, the first projection beam P1 and the second projection beam P2 generated by the image projection device D of the present invention can be moved in the same direction and simultaneously projected onto a micromirror module 3 to form a plurality of juxtapositions. Scan points 31, each of which is an area covered by a pixel. For convenience of explanation, the micromirror module 3 is divided into a plurality of rows and a plurality of columns. For example, the micromirror module 3 of the present invention can divide n columns in the X direction and divide n rows in the Y direction (as shown in FIG. 2). Shown, and each (X, Y) unit represents a scan point 31. The first light source module 1 and the second light source module 2 respectively form a single scanning point 31 by projecting a single first projection beam P1 and a second projection beam P2 per unit time. In other words, each scanning point 31 receives only one first projection beam P1 or a second projection beam P2 at a time. In addition, in this embodiment, the first projection beam P1 generated by the first illumination group 13 of the image projection device D and the second projection beam P2 generated by the second illumination group 23 are synchronously Projected in two adjacent scanning points 31 (areas covered by the pixels) in the Y direction, and moved in the X direction, so that the two adjacent X directions (rows) of the micromirror module 3 gradually receive the first projection beam P1 Or the second projection beam P2 to form a plurality of scan points 31 of two courses.

Next, after the scanning of the plurality of scanning points 31 of the same course in the Y direction is completed, for example, according to FIG. 2, (X ₁ , Y ₁ ) to (X _n , Y ₁ ), and (X ₁ , Y _{2 are completed).} After the scanning to (X _n , Y ₂ ), the image projecting device D moves in the X direction to the next two courses (in the present embodiment, the course of Y ₃ and Y ₄ ), again synchronously It is projected on two adjacent scanning points 31 in the Y direction, and is reversely moved in the X direction to complete the scanning of the next two courses. Since the speed of the beam far exceeds the number of unit frames per second recognizable by the human eye, the time difference in which the single beams are sequentially projected to the micromirror module 3 cannot be perceived by the human eye. The image projection device D is provided by the first light source module 1 and the second light source module 2, and simultaneously supplies the first projection beam P1 and the second projection beam P2 to the micromirror module 3 in a unit time. And reciprocating in the X direction, gradually completing the scanning of the micromirror module 3 in the Y direction, and finally forming a complete image.

As described above, according to the first embodiment of the present invention, the image projecting device D synchronously provides the first projection beam P1 and the second projection beam P2 in two adjacent rows in the Y direction to form a plurality of scanning points 31, A two-row projection scan program can be completed in time. In this way, the image projection apparatus of the present invention can complete the scanning of the micro-mirror module 3 of a large area in a unit time. Compared with the existing single-row scanning program, the image projection device D provided by the present invention scans in a double course, so that image projection of higher image quality or higher pixel can be completed within a predetermined time.

[Second embodiment]

3 and FIG. 4, FIG. 3 is a functional block diagram of a video projection device D according to a second embodiment of the present invention; and FIG. 4 is a schematic diagram of a light beam projection of the image projection device D according to the second embodiment of the present invention. A second embodiment of the present invention provides an image projection device D including a control module C, a first light source module 1 and a second light source module 2. The control module D of the present embodiment is electrically connected to the first light source module 1 and the second light source module 2, respectively, as in the first embodiment. The first light source module 1 also includes a first driving unit 11 and a first lighting group 13; the second light source module 2 also includes a second driving unit 21 and a second lighting group 23. Similarly, the control module C provides the first image signal S1 and the second image signal S2, and the first image signal S1 is transmitted to the first lighting group 13 to cause the first lighting group 13 to generate the first projection beam P1. And the second image signal S2 is transmitted to the second lighting group 23 to cause the second lighting group 23 to generate the second projection beam P2. The first projection beam P1 and the second projection beam P2 are moved in the same direction and are simultaneously projected onto a micromirror module 3.

In addition, the first driving unit 11 and the second driving unit 21 of the embodiment may be a laser diode driver (LDD). The first lighting group 13 and the second lighting module 23 of the embodiment may be RGB laser lighting modules. For details, please refer to the foregoing first embodiment, and details are not described herein again.

It should be noted that the difference between the control module D and the control module D provided in the first embodiment is that the first light source module 1 of the embodiment includes at least two first driving units 11 and The two light source modules 2 also include at least two second driving units 21. Each of the at least two first driving units 11 is electrically connected to a first lighting group 13 , and each of the at least two second driving units 21 is also electrically connected to a second lighting group 23 . .

In detail, the first image signal S1 provided by the control module C is transmitted to the first lighting group 13 through the at least two first driving units 11, and the second image signal S2 is passed through at least two second driving units. The unit 21 is transferred to the second lighting group 23. The first image signal S1 can pass through at least two first driving units 11 at the same time, and the second image signal S2 can also pass through at least two second driving units 21 at the same time. In the present embodiment, the two first driving units 11 and the two second driving units 21 are taken as an example, as shown in FIGS. 3 and 4. However, the drawings corresponding to the present embodiment are merely examples, and the number of the first driving unit 11 and the second driving unit 21 of the present invention is not limited. In other words, the image projecting device of the present invention may include two or more first driving units 11 and second driving units 21, for example three.

Furthermore, a part of the first image signal S1 is transmitted to the first light-emitting group 13 through one of the first driving units 11a, and another part of the first image signal S1 is transmitted to the other first driving unit 11b. The first lighting group 13. Similarly, a part of the second image signal S2 is transmitted to the second lighting group 23 through one of the second driving units 21a, and another part of the second image signal S2 is transmitted to the second driving unit 21b. Two illumination groups 23.

Next, the first lighting group 13 generates a first projection light beam P1 based on a portion of the first image signal S1 from one of the first driving units 11a and another portion of the first image signal S1 from the other first driving unit 11b. The second lighting group 23 is based on a portion of the second image signal S2 from one of the second driving units 21a and another portion of the second image signal S2 from the other second driving unit 21b to generate a second projection beam P2.

The first projection beam P1 and the second projection beam P2 emitted by the image projecting device of the second embodiment of the present invention are the same as the moving paths of the first projection beam P1 and the second projection beam P2 of the first embodiment described above. In detail, as shown in FIG. 4, for convenience of explanation, the micromirror module 3 can be divided into a plurality of rows and a plurality of columns. For example, the micromirror module 3 of the present invention can divide n columns in the X direction and n rows in the Y direction (as shown in FIG. 4). In this embodiment, the first projection beam P1 generated by the first illumination group 13 of the image projection device D and the second projection beam P2 generated by the second illumination group 23 are synchronously projected in the Y direction. Two adjacent scanning points 31, and moving in the X direction, so that each scanning point 31 in two adjacent Y directions (horizontal) gradually receives the first projection beam P1 and the second projection beam P2 to complete the sweep of the entire column. aim.

The difference between the first light source module 1 and the second light source module 2 includes at least two first driving units 11 and at least two second driving units 12, respectively. The first lighting group 13 can accept the first image signal S1 divided into a portion and another portion by the two first driving units 11. Since the signal transmission speed is relatively fast, one of the first driving units 11a and the other first driving unit 11b can alternately transmit the first image signal S1 by the arrangement of the two independent first driving units 11a and 11b. To the first lighting group 13. In this way, if the number of times of transmitting the first image signal S1 to the first light-emitting group 13 per unit time is adjusted, the first light-emitting group 13 can increase the number of times of the first projection light beam P1 generated per unit time. . Similarly, the second lighting group 23 also accepts the second image signal S2 divided into a portion and another portion by the two second driving units 21. The two independent second driving units 21a and 21b are arranged such that one of the second driving units 21a and the other second driving unit 21b alternately transmit the second image signal S2 to the second lighting group 23. Thereby, the second lighting group 23 can increase the number of times of the second projection light beam P2 generated per unit time.

Recalling the first embodiment, each scanning point 31 receives a first projection beam P1 or a second projection beam P2 per unit time. However, in the embodiment, the first light source module 1 adds a first driving unit 11, the second light source module 2 adds a second driving unit 21, the first light source module 1 and the second light source module 2 The two first projection beams P1 and the two second projection beams P2 may be respectively provided in a unit time to the area covered by the individual single pixels. In other words, each scanning point 31 receives two first projection beams P1 or two second projection beams P2 at a time.

The scanning is performed in the same manner as the first embodiment of the present invention. The first projection beam P1 is projected on two adjacent rows in the Y direction in synchronization with the second projection beam P2, and is moved in the X direction so that two adjacent ones are adjacent. Each of the scanning points 31 on the X direction (horizontal) gradually receives two first projection beams P1 or two second projection beams P2. After the scanning of the plurality of scanning points 31 of the same course in the X direction is completed, for example, according to FIG. 4, (X ₁ , Y ₁ ) to (X _n , Y ₁ ), and (X ₁ , Y ₂ ) are completed. (X _n , Y ₂ ) After the scanning point 31, the image projecting device D moves in the Y direction to the next two courses (in the present embodiment, the course of Y ₃ and Y ₄ ), and projects again in synchronization. On the two adjacent courses in the Y direction, and moving in the X direction, the scanning of the next two courses is completed. Since the speed of the beam far exceeds the number of unit frames per second recognizable by the human eye, the time difference in which the projection beam is sequentially projected to the micromirror module 3 cannot be perceived by the human eye. The image projection device D is provided by the first light source module 1 and the second light source module 2, and simultaneously supplies the first projection beam P1 and the second projection beam P2 to the micromirror module 3 in a unit time. And reciprocating in the X direction, gradually completing the scanning of the micromirror module 3 in the Y direction, and finally forming a complete image.

According to the second embodiment of the present invention, the image projecting device D can simultaneously provide the first projection beam P1 and the second projection beam P2 in two rows adjacent in the same Y direction, so that two units can be completed in one unit time. The projection scan program of the course. In addition, each of the scanning points 31 of the micromirror module 3 can receive at least two first projection beams P1 or a second projection beam P2 per unit area and unit time. In other words, the beam intensity in the X direction is more than doubled. In this way, the image projection apparatus of the present invention can complete the scanning of the micro-mirror module 3 of a large area in a unit time. In summary, the image projection device D provided by the present invention scans in a double course, and the area covered by each pixel can accept more than two projection beams to form a plurality of parallel scanning points 31. Thereby, the image projection device of the present invention has a double projection beam density in both the X direction and the Y direction compared to the conventional single course scanning program, thereby achieving higher image quality image projection, such as Full HD 1920. The image output device of ×1080 resolution greatly increases the quality of image output.

[Third embodiment]

FIG. 5 is a functional block diagram of a video projection apparatus according to a third embodiment of the present invention, and FIG. 6 is a schematic diagram of a light beam projection of the image projection apparatus according to the third embodiment of the present invention. The difference between the present embodiment and the image projection apparatus provided in the second embodiment is that the image projection apparatus D provided in this embodiment includes only the first light source module 1 and does not include the second light source module 2. As shown in FIG. 5 , the image projection device D of the embodiment includes a control module C and a first light source module 1 . Similarly, the first light source module 1 also includes two first driving units 11 and a first lighting group 13 . The control module C provides a first image signal S1, and the first image signal S1 is transmitted to the first lighting group 13 to cause the first lighting group 13 to generate the first projection beam P1. The first projection beam P1 is projected onto the micromirror module 3.

As described above, by the arrangement of the two first driving units 11, a part of the first image signal S1 is transmitted to the first lighting group 13 through one of the first driving units 11a, and the first image signal S1 is The other part is transmitted to the first lighting group 13 through the other first driving unit 11b. The procedure of the first image signal S1 being transferred to the first driving unit 11a and the other first driving unit 11b is similar to that of the foregoing second embodiment. Please refer to the second embodiment, and details are not described herein again. Next, the first lighting group 13 generates a first projection light beam P1 based on a portion of the first image signal S1 from one of the first driving units 11a and another portion of the first image signal S1 from the other first driving unit 11b.

It should be noted that the first projection light beam P1 provided by the image projection device D of the embodiment transmits the first image signal S1 by two independent first driving units 11a and 11b and drives the first light-emitting group 13 respectively. produce. That is to say, the first light source module 1 can respectively provide two first projection light beams P1 to individual scanning points 31 in a unit time. In other words, the scanning spot 31 accepts two first projection beams P1 at a time. As shown in FIG. 6, the area covered by each pixel of the micromirror module 3 can receive at least two first projection beams P1 per unit area and unit time, so that the beam intensity in the X direction is increased by one. More than this, this can increase the image quality or pixel in the X direction.

[Advantageous Effects of Embodiments]

An advantageous effect of the present invention is that the first projection light beam P1 generated by the first light-emitting group 13 and the second projection light beam P2 generated by the second light-emitting group 23 are moved in the same direction and simultaneously projected on the micromirror. Technical features of the module 3 or "the first light source module 1 comprising at least two first driving units 11a, 11b and a first lighting group 13" electrically connected to the at least two first driving units 11a, 11b Therefore, the present invention can perform image projection of higher image quality or higher pixel in a predetermined time, thereby improving image quality. The above disclosure is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Therefore, any equivalent technical changes made by using the present specification and the contents of the drawings are included in the application of the present invention. Within the scope of the patent.

Claims (6)

An image projection device includes: a control module; a first light source module, the first light source module is electrically connected to the control module, wherein the first light source module includes at least two a first driving unit and a first lighting group electrically connected to the at least two of the first driving units; and a second light source module, wherein the second light source module is electrically connected to the control module The second light source module includes at least two second driving units and a second lighting group electrically connected to the at least two of the second driving units; wherein, the control module is provided a first image signal is transmitted to the first lighting group through at least two of the first driving units, and a second image signal provided from the control module passes through at least two of the second Transmitting to the second lighting group, wherein a first projection beam generated by the first lighting group and a second projection beam generated by the second lighting group are the same Directional movement and simultaneous projection in a micromirror The group. The image projection device of claim 1, wherein a part of the first image signal is transmitted to the first light-emitting group through one of the first driving units, and the first image signal is The other part is transmitted to the first lighting group by another first driving unit, wherein a part of the second image signal is transmitted to the second light through one of the second driving units a group, and another portion of the second image signal is transmitted to the second lighting group by another one of the second driving units. The image projection device of claim 1, wherein the first projection beam and the second projection beam are simultaneously projected on the microlens module to form a plurality of Scan the point. An image projection device includes: a control module; and a first light source module, wherein the first light source module is electrically connected to the control module, wherein the first light source module includes at least two a first driving unit and a first lighting group electrically connected to the at least two of the first driving units; wherein a first image signal provided from the control module passes through at least two of the first A driving unit is transmitted to the first lighting group, and a first projection beam generated by the first lighting group is projected on a micromirror module. The image projection device of claim 4, further comprising: a second light source module, wherein the second light source module is electrically connected to the control module, wherein the second light source module comprises at least Two second driving units and a second lighting group electrically connected to the at least two of the second driving units. The image projection device of claim 4, wherein a portion of the first image signal is transmitted to the first light-emitting group through one of the first driving units, and the first image signal is Another portion is transmitted to the first lighting group by another one of the first driving units.