TWI696028B - Projection display apparatus and projecting method - Google Patents

Abstract

A projecting method includes: outputting, by a projection display apparatus, a projected image to a projection screen through a shifting device, wherein the projected image includes multiple frames; outputting, by a processing circuit, a control signal to drive the shifting device to rotate multiple first angles along a first axis and rotate multiple second angles along a second axis, wherein combination of the first and the second angles corresponds to multiple projected positions; and when the projection display apparatus outputs multiple frames sequentially, rotating the shifting device sequentially according to the control signal to make multiple frames projected to the corresponding one of projected positions, wherein a number of the first angles or the second angles is at least four.

Description

Projection display device and projection method

The present disclosure relates to a projection display device and a projection method, and particularly relates to a projection display device and a projection method that improves the resolution.

With the development of science and technology, the demand for high-resolution projection displays has become more and more extensive. The high-resolution images provide clear detailed information and high-quality viewing, and are very helpful for user experience and many application fields.

However, in consideration of cost-effectiveness or device size, the resolution of the projection display device is limited. Therefore, how to improve the projection resolution of a projection display device is one of the issues in this field.

One aspect of the present disclosure relates to a projection method, including: outputting a projected image to a projection screen by a projection display device through an offset device, wherein the projected image includes a plurality of frames; a processing circuit outputs a control signal to drive the offset device edge The first axis rotates a plurality of first angles or rotates a plurality of second angles along the second axis, wherein the combination of the first angle and the second angle corresponds to a plurality of projection positions; and when the projection display device sequentially outputs a plurality of frames of pictures, The offset device is rotated in sequence according to the control signal so that the plurality of frames are projected to a corresponding one of the projection positions, wherein the number of the first angle or the second angle is at least four.

One aspect of the present disclosure relates to a projection display device. The projection display device includes an offset device, an imaging device, and a processing circuit. The imaging device is used to output a plurality of frames to the offset device. The processing circuit is used to output a control signal to drive the offset device to rotate a plurality of first angles along the first axis or a plurality of second angles along the second axis, so that a plurality of frames of images are respectively output to the corresponding plurality of projections through the offset device Position to form a projected image. The resolution of the projected image is greater than the resolution of multiple frames. The number of the first angle or the second angle is at least four.

All words used in this article have their usual meanings. The above-mentioned words are defined in commonly used dictionaries. The usage examples of any words discussed in this specification are only examples, and should not be limited to the scope and meaning of this disclosure. Likewise, the present disclosure is not limited to the various embodiments shown in this specification.

The terms "include", "have" and so on used in this article are all open terms, meaning "including but not limited to". In addition, the "and/or" used in this article includes any one or more of the related listed items and all combinations thereof.

In this article, the terms first, second, third, etc., are used to describe various elements, components, regions, layers, and/or blocks, and it is understandable. However, these elements, components, regions, layers and/or blocks should not be limited by these terms. These terms are only used to identify a single element, component, region, layer, and/or block. Therefore, in the following, a first element, component, region, layer and/or block may also be referred to as a second element, component, region, layer and/or block without departing from the original meaning of the present case.

Regarding the "coupling" or "connection" used in this article, it can refer to two or more components directly making physical or electrical contact with each other, or indirectly making physical or electrical contact with each other, and can also refer to two or more components. Interoperability or action of components.

Please refer to Figure 1. FIG. 1 is a schematic diagram of a projection display device 100 according to some embodiments of the present disclosure. As shown in FIG. 1, the projection display device 100 includes a memory 110, a processing circuit 120, an imaging device 140, an offset device 160, and a lens 180. Structurally, the memory 110 is coupled to the processing circuit 120. The processing circuit 120 is coupled to the imaging device 140 and the offset device 160.

In operation, the memory 110 is used to store data or signals. The processing circuit 120 is used to output the data signal S1 to the imaging device 140 and output the control signal S2 to the offset device 160. The imaging device 140 is used for outputting a plurality of frames L1 to the offset device 160 according to the data signal S1. The offset device 160 is used to rotate a plurality of first angles along the first axis and/or a plurality of second angles along the second axis according to the control signal S2, so that the plurality of frame images L1 are output to the corresponding plurality of projection positions respectively to form Project image L3. Specifically, the projected image L3 is formed by combining the shifted plural frame screens L2. The multiple frame images L2 are shifted from the multiple frame images L1 to corresponding multiple projection positions. The multiple projection positions are formed according to a combination of multiple first angles and multiple second angles. In other words, the shifting device 160 shifts the plural frames of pictures L1 to different positions of the lens 180 according to the first angle and the second angle to form plural frames of pictures L2. The lens 180 is used to project the shifted frames L2 onto the projection screen 190 to form a projection image L3.

In some embodiments, the projection display device 100 may be a digital TV, a digital micro mirror, a household or professional projector, and so on. In some implementations, the processing circuit 120 can be a central processing unit (CPU), an application-specific integrated circuit (ASIC), a digital signal processor (DSP), or a complex programmable logic element ( Complex Programmable Logic Device (CPLD), Field-programmable gate array (FPGA), multi-processor, distributed processing system, or appropriate processor, etc. are implemented in various ways. It is worth noting that the foregoing implementation of the processing circuit 120 is used as an example, but this case is not limited to this. Various circuits or units used to implement the processing circuit 120 are within the scope of this disclosure.

Please refer to Figure 2. FIG. 2 is a schematic diagram of an offset device 160 according to some embodiments of the present disclosure. As shown in FIG. 2, one U1 of the plurality of frames L1 forms a corresponding one U2 of the shifted plurality of frames L2 through the offset device 160. Specifically, the offset device 160 rotates to different angles according to the control signal S2 of the processing circuit 120 (as shown in D1, D2, D3, D4 in Figure 2), so that the light beam U1 passes through the offset device 160 and is refracted into different angles. The beam U2.

For example, the offset device 160 includes a lens M1 with a thickness R1, as shown in the enlarged schematic diagram in FIG. 2. Since the refractive index n2 of the lens M1 is different from the refractive index n1 of the air, when the light beam U1 enters the lens M1 from the air at an incident angle θ1 and a refraction angle θ2, the light beam U2 will come from the lens M1 at an incident angle θ2 and a refraction angle θ1. The lens M1 shoots out into the air, where the beam U2 and the beam U1 are offset by a distance of d1. When the incident angle θ1 of the light beam U1 is greater, the distance d1 that the light beam U2 is offset from the light beam U1 is greater.

In this way, by adjusting the lens M1 in the shift device 160 to rotate to different angles to change the incident angle θ1 of the light beam U1, different degrees of shift distance d1 can be generated, so that the plural frames of pictures L1 form shifted Multiple frames of picture L2.

For further details, please refer to Figure 3. FIG. 3 is a flowchart of a projection method according to some embodiments of the present disclosure. For the sake of convenience and clarity, the following projection method 300 is described in conjunction with the embodiments shown in Figures 1 to 15, but is not limited to this. Anyone who is familiar with this technique will not depart from the spirit and scope of this case. Inside, you can make a variety of changes and retouching. As shown in FIG. 3, the projection method 300 includes operations S310, S320, S330, S340, and S350.

First, in operation S310, the processing circuit 120 generates and outputs a data signal S1 of a plurality of frames L1 according to the original image. Specifically, the processing circuit 120 combines pixel data at corresponding positions in a plurality of pixel groups in the original image into a corresponding one of the plurality of frames L1.

For example, please refer to Figure 4. FIG. 4 is a schematic diagram of generating a plurality of frames L1 according to some embodiments of the present disclosure. In the embodiment in FIG. 4, the resolution of the original image IMD is 4x8 as an example. The original image IMD contains 32 pixel data P11～P48. The plural adjacent pixel data among the pixel data P11 to P48 belong to the same group (as shown in the pixel groups G1, G2, G3, and G4 in Figure 4). The processing circuit combines the pixel data P11, P15, P31, and P35 in the upper left corner of the pixel groups G1, G2, G3, and G4 in the original image IMD to form the first frame F1 in the plurality of frames L1. The processing circuit combines the second pixel data P12, P16, P32, P36 in the upper left corner of the pixel group G1, G2, G3, G4 in the original image IMD into the second frame F2 in the plural frame picture L1 .

By analogy, the processing circuit 120 divides the pixel data P13, P17, P33, P37 and P14, P18, P34, P38, and P24, P13, P17, P33, P37 and P14, P18, P34, P38, and P24, respectively, in the corresponding positions in the pixel groups G1, G2, G3, and G4 in the original image IMD. P28, P44, P48 and P23, P27, P43, P47 and P22, P26, P42, P46 and P21, P25, P41, P45 are respectively combined into the third to eighth frames F3 to F8 in the plural frame pictures L1. In this way, the processing circuit 120 can generate a data signal S1 of eight frames F1 to F8 with a resolution of 2x2 according to the original image IMD with a resolution of 4x8, and output the data signal S1 of the eight frames F1 to F8 to the imaging装置140。 Device 140.

It is worth noting that the resolution of the original image IMD and the number and size of pixel data contained in the original image IMD in Fig. 4 and the above description are only examples for convenience of explanation, and are not intended to limit the case. Those with general knowledge in the field can adjust according to actual design requirements.

Then, in operation S320, the imaging device 140 receives and outputs a plurality of frames according to the data signal S1. Specifically, the imaging device 140 receives the data signal S1 containing multiple frames of pictures (such as F1 to F8 in Figure 4) from the processing circuit 120, and sequentially outputs the multiple frame pictures L1 to the offset device 160 according to the data signal S1 .

In addition, in operation S330, the processing circuit 120 outputs a control signal S2. In operation S340, the offset device 160 receives the control signal S2 and rotates according to the control signal S2. Specifically, the control signal S2 includes a first control signal (such as the signal AV in Figure 5) and a second control signal (such as the signal AH in Figure 5). The offset device 160 rotates a plurality of first angles along the first axis according to the first control signal, and rotates a plurality of second angles along the second axis according to the second control signal. The first angle and the second angle correspondingly form a plurality of projection positions. In some embodiments, the first axis and the second axis are perpendicular to each other. In some embodiments, the number of the first angle or the second angle is at least four.

V2，第三準位為+

V2，第四準位為+V2。 For example, please refer to Figure 5. FIG. 5 is a schematic diagram of offsetting a plurality of frames L1 according to some embodiments of the present disclosure. In the embodiment of Figure 5, the offset device 160 rotates two angles along the X axis according to the signal AV containing two levels, so that the plural frame images L1 are offset by two positions in the Y direction (as indicated by the positions Z4 and Z5). Show). For example, the first level of the signal AV is +V1, and the second level is -V1. In addition, the shifting device 160 rotates four angles along the Y axis according to the signal AH including four levels, so that the plurality of frames L1 are shifted by four positions in the X direction (as shown by the positions Z1, Z2, Z3, and Z4). For example, the first level of the signal AH is -V2, and the second level is-

V2, the third level is +

V2, the fourth level is +V2.

In this way, by rotating the offset device 160 by a plurality of first angles along the first axis and a plurality of second angles along the second axis according to the control signal S2, corresponding multiple projection positions can be formed.

Then, in operation S350, a plurality of frames of pictures L1 are respectively projected to corresponding plurality of projection positions through the offset device 160 to form a projection image L3. Specifically, the multiple frames of images L1 (such as F1 to F8 in Figure 4) sequentially output by the imaging device 140 are shifted to corresponding multiple projection positions (such as Z1 to Z8 in Figure 5) by the shifting device 160. ) A plurality of frames of picture L2 are formed, and the plurality of frames of picture L2 are projected to the projection screen 190 through the lens 180 to form a projected image L3.

For example, as shown in FIG. 5, during T1, the imaging device 140 outputs a first frame of picture F1, and the first frame of picture F1 is shifted to the projection position Z1 by the shifting device 160. During T2, the imaging device 140 outputs a second frame of picture F2, and the second frame of picture F2 is shifted to the projection position Z2 through the shifting device 160. By analogy, during the period T3 to T8, the imaging device 140 outputs the third to eighth frames F3 to F8, respectively, and the third to eighth frames F3 to F8 are respectively shifted to the projection positions Z3 to Z8 through the offset device 160. .

For further details, please refer to Figures 5 and 6 together. FIG. 6 is a schematic diagram illustrating a combination of multiple frames F1 to F8 into a projected image L3 according to some embodiments of the present disclosure. In the embodiment shown in Fig. 6, the multiple frames F1 to F8 have a resolution of 2x2 as an example. Zref is the projection position corresponding to when the offset device 160 is not activated (does not perform offset). In other words, Zref represents the center reference position of the frames F1 to F8. Zref is the same size as any one of the plurality of frames F1 to F8, and its unit pixel length and width are A and B.

B並沿X方向往左偏移

A，成像裝置140輸出第一幀畫面F1便會偏移至如第6圖所示的投影位置Z1。又例如，當在T6期間，偏移裝置160根據凖位-V1的訊號AV和準位+

V2的訊號AH分別使得幀畫面F1沿Y方向往下偏移

B並沿X方向往右偏移

A，成像裝置140輸出第六幀畫面F6便會偏移至如第6圖所示的投影位置Z6。由此可知，在經過T1～T8期間（即構成一個完整畫面的週期Tp）後，第5圖中第一到第八幀畫面F1～F8將重疊組合成如第6圖中投影範圍Zall所示的投影影像L3。 In some embodiments, during T1, the offset device 160 shifts the frame image F1 upward in the Y direction according to the signal AV of the level +V1 and the signal AH of the level -V2 respectively.

B and offset to the left in the X direction

A. The first frame F1 output by the imaging device 140 will shift to the projection position Z1 as shown in FIG. 6. For another example, during T6, the offset device 160 is based on the signal AV and the level +

The signal AH of V2 makes the frame picture F1 shift down in the Y direction.

B and offset to the right in the X direction

A. The sixth frame F6 output by the imaging device 140 will shift to the projection position Z6 as shown in FIG. 6. It can be seen that after the period T1 to T8 (that is, the period Tp that constitutes a complete picture), the first to eighth frames F1 to F8 in Figure 5 will be overlapped and combined as shown in the projection range Zall in Figure 6. The projected image L3.

A）。在Y方向上相鄰的投影位置（如投影位置Z1和Z8）相差單位畫素長度B的二分之一（如第6圖標示

B）。值得注意的是，以解析度2x2為例，左上角的畫素在第四投影位置與右上角的畫素在第一投影位置相距單位畫素長度A的二分之一。換言之，不論在X方向移動四個位置或在Y方向上移動兩個位置，距離參考中心位置Zref最遠的投影位置（如投影位置Z1）的邊緣皆距離中心相同距離。亦即，不論投影影像L3包含多少幀畫面，投影範圍Zall皆為固定。亦即，所有的投影位置Z1～Z8與參考中心位置Zref之間的距離皆小於或等於單位畫素長度A或B的四分之一。 As shown in the embodiment in Figure 6, adjacent projection positions in the X direction (such as projection positions Z1 and Z2) differ by one-sixth of the unit pixel length A (as shown in the sixth icon)

A). The adjacent projection positions in the Y direction (such as projection positions Z1 and Z8) differ by one-half of the unit pixel length B (as shown in the sixth icon)

B). It is worth noting that, taking the resolution of 2x2 as an example, the pixel in the upper left corner at the fourth projection position and the pixel in the upper right corner at the first projection position are separated by one-half of the unit pixel length A. In other words, regardless of moving four positions in the X direction or two positions in the Y direction, the edge of the projection position farthest from the reference center position Zref (such as the projection position Z1) is the same distance from the center. That is, no matter how many frames the projected image L3 contains, the projection range Zall is fixed. That is, the distance between all the projection positions Z1 to Z8 and the reference center position Zref is less than or equal to a quarter of the unit pixel length A or B.

In this way, the original image L1 output by the imaging device 140 can be projected to the corresponding eight projection positions by rotating the offset device 160 along one axis by four angles and the other axis by two angles. With the persistence of vision generated by the human eye, the multiple frames on the eight projection positions are overlapped and combined into a projection image L3. Therefore, it is possible to output and project multiple frames with lower original resolution to produce a new-resolution projected image eight times the original resolution.

It is worth noting that the above-mentioned number of angles and deflection amplitudes are only examples for convenience of explanation, and are not intended to limit the case. Examples of other angles will be described in the following paragraphs.

Please refer to Figure 7. FIG. 7 is a schematic diagram of generating a plurality of frames F1 to F16 according to some other embodiments of the present disclosure. In the embodiment shown in Fig. 7, it is similar to the embodiment shown in Fig. 4, and the similar operations have been described in the previous paragraphs and will not be repeated here. Compared with Figure 4, in this embodiment, the resolution of the original image IMD is 8x8. In other words, the original image IMD includes 64 pixel data P11 to P88. The plural adjacent pixel data among the pixel data P11 to P88 belong to the same group (as shown in the pixel group G1 in the figure). The processing circuit 120 combines the pixel data (such as P11, P15, P51, P55 or P32, P36, P72, P76) at corresponding positions in different pixel groups in the original image IMD into multiple frames of different frames in the picture L1. Screen (such as F1 or F10).

In this way, the processing circuit 120 can generate the data signal S1 of the sixteen frames F1 to F16 with the resolution of 2x2 according to the original image IMD with the resolution of 8x8, and output the data signal S1 of the sixteen frames F1 to F16. To the imaging device 140.

Next, please refer to Figure 8 and Figure 9 together. FIG. 8 is a schematic diagram of offsetting a plurality of frames F1 to F16 according to other embodiments of the present disclosure. FIG. 9 is a schematic diagram of a plurality of frames F1 to F16 combined into a projected image L3 according to other embodiments of the present disclosure. In the embodiment of Fig. 8 and Fig. 9, it is similar to the embodiment of Fig. 5 and Fig. 6, and the similar operation has been explained in the previous paragraph, so it will not be repeated here. In addition, for the sake of clarity and conciseness in the drawing, only the projection positions Z1 to Z16 corresponding to the period T1 to T16 are marked in Figure 8, and in Figure 9, the center point positions included in the projection positions Z1 to Z16 are used. N1 to N16 represent the positions of the projection positions Z1 to Z16, and arrows indicate the moving directions of the projection positions Z1 to Z16.

Compared with Fig. 5 and Fig. 6, in this embodiment, the offset device 160 rotates four angles along the X axis according to the signal AV containing four levels, so that the plural frame pictures L1 are offset by four in the Y direction. Position (such as the corresponding projection positions Z1, Z5, Z9, and Z13 during T1, T5, T9, and T13). In addition, the shift device 160 rotates four angles along the Y axis according to the signal AH including four levels, so that the plurality of frames L1 are shifted by four positions along the X direction (as corresponding to the periods T1, T2, T3, and T4). Projection positions Z1, Z2, Z3 and Z4). In other words, the offset device 160 rotates four first angles along the first axis and four second angles along the second axis according to the control signal S2 to form corresponding sixteen projection positions Z1 to Z16.

In this embodiment, the period Tp constituting a complete picture includes the period from T1 to T16. During the period T1 to T16, the multiple frames of images (such as F1 to F16 in Figure 7) sequentially output by the imaging device 140 are shifted to the corresponding multiple projection positions (such as N1 to F16 in Figure 9) through the offset device 160. N16) A plurality of frames of picture L2 are formed, and the plurality of frames of picture L2 are projected to the projection screen 190 through the lens 180 to form a projected image L3.

For example, during T1, the first frame F1 output by the imaging device 140 is shifted by the shift device 160 to the projection position Z1 (the center point is at N1) as shown in FIG. 9. During T11, the eleventh frame F11 output by the imaging device 140 is shifted by the shift device 160 to the projection position Z11 (the center point is at N11) as shown in FIG. 9.

B）。且，以解析度2x2為例，左上角的畫素在第十六投影位置與左下角的畫素在第一投影位置相距單位畫素長度B的二分之一。換言之，不論在Y方向移動二或四個位置，距離參考中心位置Zref最遠的投影位置的邊緣皆距離中心相同距離（如：第6圖的投影位置Z1與參考中心位置Zref的距離，相等於第9圖的投影位置Z1與參考中心位置Zref的距離）。亦即，不論投影影像L3包含多少幀畫面，投影範圍Zall皆為固定。 In addition, in the embodiment in Fig. 9, compared with the embodiment in Fig. 6, adjacent projection positions in the Y direction (such as projection positions N1 and N8) differ by one-sixth of the unit pixel length B ( As shown in the 9th icon

B). And, taking the resolution of 2x2 as an example, the pixel in the upper left corner at the sixteenth projection position and the pixel in the lower left corner at the first projection position are one-half of the unit pixel length B away from each other. In other words, regardless of moving two or four positions in the Y direction, the edge of the projection position farthest from the reference center position Zref is the same distance from the center (for example, the distance between the projection position Z1 and the reference center position Zref in Figure 6 is equal to The distance between the projection position Z1 in Figure 9 and the reference center position Zref). That is, no matter how many frames the projected image L3 contains, the projection range Zall is fixed.

In addition, as shown in Figure 8, in some embodiments, the wavelength λ1 of the square wave signal AV is approximately twice the wavelength λ2 of the square wave signal AH (that is, the frequency of the square wave signal AH is approximately equal to that of the square wave signal AV The offset device 160 rotates at a first angle according to the square wave signal AV and rotates at a second angle according to the square wave signal AH. The projection positions Z1～Z16 will be as shown in Fig. 9 with S Type move. It is worth noting that when the time length of each period is shorter, the square wave signal will be similar to the triangular wave signal.

In other embodiments, as shown in Figure 10, the wavelength λ3 of the square wave signal AV is approximately four times the wavelength λ2 of the square wave signal AH (that is, the frequency of the square wave signal AH is approximately equal to that of the square wave signal AV. Four times the frequency). During the period from T1 to T16, similar to the embodiment in Fig. 9, the projection positions Z1 to Z16 move in an S-shape. During the period from T17 to T32, unlike the embodiment shown in Fig. 9, the projection position moves in an S-shaped reverse direction. In other words, as indicated in Figure 10, the corresponding projection positions during the period T17 to T32 are Z16 to Z1. Specifically, the corresponding pixel data of the image frames contained in the respective projection positions Z16 to Z1 corresponding to the periods T17 to T32 are shown in the plural frames of frames F16 to F1 in FIG. 7.

In addition, in other embodiments, as shown in FIG. 11, the control signal includes two signals AV and AH with the same wavelength of λ4 and a phase difference of 90 degrees. In this embodiment, the period Tp constituting a complete picture includes the period T1 to T8. During the period T1 to T8, the multiple frames of pictures sequentially output by the imaging device 140 are shown as F1 to F8 in FIG. 12. The multiple frames of pictures F1 to F8 are shifted to corresponding multiple projection positions (as shown by N1 to N8 in FIG. 13) through the offset device 160 to form a plurality of frames of pictures L2. The lens 180 is used to project the shifted frames L2 onto the projection screen 190 to form a projection image L3.

For example, during T1, the first frame F1 output by the imaging device 140 is shifted by the shift device 160 to the projection position Z1 (the center point is located at N1) as shown in FIG. 13. During T3, the eleventh frame F11 output by the imaging device 140 is shifted by the shift device 160 to the projection position Z3 (the center point is at N3) as shown in FIG. 13.

It is worth noting that, since the offset device 160 is rotated according to the control signal S2 to form a corresponding projection position, the amplitude of the change of the control signal S2 in each period can be adjusted to control the offset device 160 to rotate to a higher level. More subtle angles to form more projection positions. In other words, the pixel data in the period Tp that constitutes a complete picture is allocated to more multiple frames of pictures, and the corresponding control signal (for example: the sine wave signal AV, AH shown in Figure 14) can be used to make the projection The projected image L3 output by the display device 100 achieves a higher native resolution effect.

V2，第三準位為+

V2，第四準位為+V2。換言之，偏移裝置160根據訊號AH沿Y軸每次轉動的角度的大小不完全相同。也就是說，複數幀畫面L1沿X方向每次偏移的距離不完全相同。 In addition, in other embodiments, the distance between adjacent projection positions may not be completely the same. Specifically, please refer to Figure 15 and Figure 16. In the embodiment of FIG. 15 and FIG. 16, they are similar to the embodiment of FIG. 5 and FIG. 6, respectively, and the similar operations have been described in the previous paragraphs, and will not be repeated here. Compared with Fig. 5 and Fig. 6, in this embodiment, the first level of the signal AH is -V2, and the second level is-

V2, the third level is +

V2, the fourth level is +V2. In other words, the magnitude of the angle each time the offset device 160 rotates along the Y axis according to the signal AH is not completely the same. In other words, the distances that the plural frames of pictures L1 are shifted in the X direction each time are not completely the same.

B並沿X方向往左偏移

A。當在T3期間，偏移裝置160根據凖位+V1的訊號AV和準位+

V2的訊號AH分別使得幀畫面F1沿Y方向往上偏移

B並沿X方向往右偏移

A。 To further illustrate, in Figure 16, for the sake of clarity and conciseness, the respective center point positions N1 to N8 of the projection positions Z1 to Z8 are used to represent the positions of the projection positions Z1 to Z8. During T1, the shift device 160 shifts the frame image F1 upward in the Y direction according to the signal AV at the level +V1 and the signal AH at the level -V2 respectively.

B and offset to the left in the X direction

A. During T3, the offset device 160 is based on the signal AV and the level +

The signal AH of V2 makes the frame picture F1 shift upward in the Y direction.

B and offset to the right in the X direction

A.

A）。投影位置Z2和投影位置Z3相差單位畫素長度A的四分之一（如圖所示

A）。投影位置Z3和投影位置Z4相差單位畫素長度A的八分之一。由此可知，相鄰的投影位置之間的間距不完全相同。 For example, as shown in Figure 16, the difference between the projection position Z1 and the projection position Z2 is one-eighth of the unit pixel length A (as shown in the figure)

A). The difference between the projection position Z2 and the projection position Z3 is a quarter of the unit pixel length A (as shown in the figure)

A). The difference between the projection position Z3 and the projection position Z4 is one-eighth of the unit pixel length A. It can be seen that the distances between adjacent projection positions are not completely the same.

Those with ordinary knowledge in the art can directly understand how to perform the operations and functions of the projection method 300 based on the signal waveforms AV and AH in the various embodiments described above, so the details are not repeated here.

Although the disclosed methods are shown and described herein as a series of steps or events, it should be understood that the order of these steps or events shown should not be construed in a limiting sense. For example, some steps may occur in a different order and/or simultaneously with other steps or events other than the steps or events shown and/or described herein. In addition, when implementing one or more aspects or embodiments described herein, not all the steps shown here are necessary. In addition, one or more steps in this document may also be executed in one or more separate steps and/or stages.

It should be noted that, in the case of no conflict, the features and circuits in the various drawings, embodiments, and embodiments of the present disclosure can be combined with each other. The circuit shown in the drawing is only an example, and is simplified to make the description concise and easy to understand, and is not intended to limit the case. In addition, the various devices, units, and components in the foregoing embodiments can be implemented by various types of digital or analog circuits, and can also be implemented by different integrated circuit chips, or integrated into a single chip. The foregoing is only an example, and the present disclosure is not limited thereto.

In summary, by applying the above embodiments, the offset device 160 is rotated to different angles according to the control signal S2, so that multiple frames of images can be superimposed to form a higher-resolution projection due to the visual persistence of the human eye. Image, to achieve the effect of increasing the resolution of the native screen.

Although this case has been disclosed in the above implementation mode, it is not limited to this case. Anyone who is familiar with this technique can make various changes and modifications without departing from the spirit and scope of this case. Therefore, the scope of protection of this case should be attached hereafter. Those defined in the scope of the patent application shall prevail.

V2、-

V2、-

V2、+

V2、-V2:準位 100: Projection display device 110: Memory 120: Processing circuit 140: Imaging device 160: Offset device 180: Lens 190: Projection screen S1: Data signal S2, AV, AH: Control signal L1, L2: Multiple frame picture L3: Projection image U1, U2: beam D1～D4: deflection angle M1: lens R1: thickness n1, n2: refractive index θ1, θ2: angle d1: distance 300: projection method S310～S350: operation IMD: original image P11～88: Pixel data G1～G4: pixel group F1～F16: frame picture T1～T32: period Z1～Z16, N1～N16: projection position Tp: cycle X, Y: direction Zref: reference position Zall: projection range A, B: Side length of unit pixel λ1～λ4: Wavelength +V1, -V1, +V2, +

V2,-

V2,-

V2, +

V2, -V2: level

FIG. 1 is a schematic diagram of a projection display device according to some embodiments of the present disclosure. FIG. 2 is a schematic diagram of an offset device according to some embodiments of the present disclosure. FIG. 3 is a flowchart of a projection method according to some embodiments of the present disclosure. FIG. 4 is a schematic diagram of generating multiple frames according to some embodiments of the present disclosure. FIG. 5 is a schematic diagram of offsetting a plurality of frames according to some embodiments of the present disclosure. FIG. 6 is a schematic diagram illustrating a combination of multiple frames into a projected image according to some embodiments of the present disclosure. FIG. 7 is a schematic diagram of generating multiple frames according to other embodiments of the present disclosure. FIG. 8 is a schematic diagram of offsetting a plurality of frames according to other embodiments of the present disclosure. FIG. 9 is a schematic diagram illustrating a combination of multiple frames into a projected image according to other embodiments of the present disclosure. FIG. 10 is another schematic diagram of offsetting a plurality of frames according to other embodiments of the present disclosure. FIG. 11 is another schematic diagram of offsetting a plurality of frames according to other embodiments of the present disclosure. FIG. 12 is another schematic diagram of generating multiple frames according to other embodiments of the present disclosure. FIG. 13 is a schematic diagram showing another combination of multiple frames of pictures into a projected image according to other embodiments of the present disclosure. FIG. 14 is a schematic diagram of a control signal according to some embodiments of the present disclosure. FIG. 15 is another schematic diagram of offsetting a plurality of frames according to other embodiments of the present disclosure. FIG. 16 is a schematic diagram showing another combination of multiple frames of pictures into a projected image according to other embodiments of the present disclosure.

AV, AH: control signal

T1~T8: period

F1~F8: Frame picture

Z1~Z8: Projection position

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V2、-V2:準位 +V1, -V1, +V2, +

V2,-

V2, -V2: level

Tp: period

X, Y: direction

Claims (12)

A projection method includes: a processing circuit generates a plurality of frames according to an original image, the original image has a plurality of pixel data, and the plurality of frames respectively includes a corresponding number of the pixel data; and a projection display device A projection image is output to a projection screen through an offset device, wherein the projection image includes the plurality of frames; the processing circuit outputs a control signal to drive the offset device to rotate a plurality of first angles along a first axis or Rotate a plurality of second angles along a second axis, wherein the combination of the first angles and the second angles corresponds to a plurality of projection positions, and the plurality of projection positions overlap each other; and the projection display device sequentially outputs the plurality of projection positions The frame images are sequentially rotated by the shifting device according to the control signal so that the plurality of frame images are projected to a corresponding one of the projection positions, wherein the number of the first angles or the second angles is at least four, The overlapping area of two frames in the plurality of frames includes corresponding two of the pixel data. The projection method according to claim 1, wherein the resolution of the plurality of frames is smaller than the resolution of the projected image. The projection method according to claim 1, wherein the number of the first angles and the number of the second angles are different. The projection method according to claim 1, wherein the plurality of frames of pictures comprise a unit pixel, and the projection positions are between the reference positions The distances are less than or equal to a quarter of the length of the unit pixel. The projection method according to claim 1, wherein the distances between adjacent projection positions among the projection positions are the same. The projection method according to claim 1, wherein the distances between adjacent projection positions among the projection positions are not completely the same. The projection method according to claim 1, wherein the offset device is rotated along the first angles according to a first sine wave in the control signal, and along the second angles according to a second sine wave in the control signal Rotate. The projection method according to claim 1, wherein the offset device is rotated along the first angles according to a first square wave in the control signal, and along the second angles according to a second square wave in the control signal Rotating, wherein the frequency of the first square wave is twice the frequency of the second square wave. The projection method according to claim 1, wherein the offset device is rotated along the first angles according to a first square wave in the control signal, and along the second angles according to a second square wave in the control signal Rotating, wherein the frequency of the first square wave is four times the frequency of the second square wave. A projection display device includes: an offset device; a processing circuit for generating a plurality of frames according to an original image, The original image has a plurality of pixel data, and the plurality of frames respectively include corresponding ones of the pixel data; and an imaging device for outputting the plurality of frames to the offset device, wherein the processing circuit uses To output a control signal to drive the offset device to rotate a plurality of first angles along a first axis or to rotate a plurality of second angles along a second axis, so that the plurality of frames of pictures are respectively output to the corresponding ones through the offset device A plurality of projection positions form a projection image, wherein the plurality of projection positions overlap each other, the resolution of the projection image is greater than the resolution of the plurality of frames, and the number of the first angles or the second angles is at least four , Wherein the overlapping area of two frames in the plurality of frames includes corresponding two of the pixel data. The projection display device according to claim 10, wherein the number of the first angles and the number of the second angles are different. The projection display device according to claim 10, wherein the control signal includes a first sine wave and a second sine wave, and the offset device is rotated along the first angles according to the first sine wave and according to the first sine wave. The second sine wave rotates along the second angle.

Images