CN112804465A - Expansion module control circuit and operation method thereof and projection device - Google Patents
Expansion module control circuit and operation method thereof and projection device Download PDFInfo
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- CN112804465A CN112804465A CN201911110849.3A CN201911110849A CN112804465A CN 112804465 A CN112804465 A CN 112804465A CN 201911110849 A CN201911110849 A CN 201911110849A CN 112804465 A CN112804465 A CN 112804465A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
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Abstract
The invention discloses an expansion module control circuit, an operation method thereof and a projection device. The expansion module control circuit comprises a signal path switching circuit, an expansion slot and a control circuit. The signal path switching circuit receives a data signal. The external data processing chip is arranged in the expansion slot in a pluggable manner and is electrically connected with the expansion slot. When the external data processing chip is not electrically connected with the expansion slot, the control circuit controls the signal path switching circuit to transmit the data signal along the first path, and when the external data processing chip is electrically connected with the expansion slot, the control circuit controls the signal path switching circuit to transmit the data signal along the second path, wherein the first path does not include the expansion slot, and the second path includes the first path, the expansion slot and the external data processing chip. The projection device comprises the expansion module control circuit. The invention can flexibly expand the application function of the circuit and automatically adjust the processing path of the data signal.
Description
[ technical field ] A method for producing a semiconductor device
The present invention relates to electronic circuit technologies, and in particular, to an expansion module control circuit, an operating method thereof, and a projection apparatus.
[ background of the invention ]
The main circuit board of the present electronic device has a processing circuit for performing various data processing on the data signal. For example, data signals used to display an image often require image processing, such as color compensation, frame rate compensation, image geometry correction, and the like, via image processing circuitry. However, the circuit architecture of the existing processing circuit is often fixed, that is, the processing flow through which the data signal passes is also fixed. In existing processing circuits, data signals are transmitted along a single path to each processing chip.
As a result, when a user or a manufacturer wants to change the processing flow of the data signal or upgrade a part of the processing circuit, the entire processing circuit needs to be replaced, which increases the cost and lacks flexibility in application. Therefore, it is an important issue to provide a processing circuit with simple structure and flexible space in data signal processing flow and hardware upgrade.
[ summary of the invention ]
The invention provides an expansion module control circuit, an operation method thereof and a projection device, which have the advantage of modularization and expand or upgrade the processing flow of data signals by installing a pluggable external data processing chip on an expansion slot.
The invention relates to an expansion module control circuit, which comprises a signal path switching circuit, an expansion slot and a control circuit. The signal path switching circuit receives a data signal. The expansion slot is electrically connected with the signal path switching circuit, wherein at least one external data processing chip is arranged in the expansion slot in a pluggable manner and is electrically connected with the expansion slot. The control circuit is electrically connected with the signal path switching circuit and the expansion slot, wherein when at least one external data processing chip is not electrically connected with the expansion slot, the control circuit controls the signal path switching circuit to transmit data signals along a first path, and when at least one external data processing chip is electrically connected with the expansion slot, the control circuit controls the signal path switching circuit to transmit data signals along a second path, wherein the first path does not include the expansion slot, and the second path includes the first path, the expansion slot and at least one external data processing chip.
The invention relates to an operation method for an expansion module control circuit, which comprises the following steps: receiving a data signal through a signal path switching circuit; judging whether at least one external data processing chip is arranged in the expansion slot in a pluggable manner and is electrically connected with the expansion slot through the control circuit; when at least one external data processing chip is not electrically connected with the expansion slot, the control circuit controls the signal path switching circuit to transmit data signals along the first path; and when the at least one external data processing chip is electrically connected with the expansion slot, the control circuit controls the signal path switching circuit to transmit the data signal along a second path, wherein the first path does not comprise the expansion slot, and the second path comprises the first path, the expansion slot and the at least one external data processing chip.
The invention relates to a projection device, which comprises an expansion module control circuit, a back-end data processing circuit, a light valve and a projection lens, wherein the expansion module control circuit comprises a signal path switching circuit, an expansion slot and a control circuit. The signal path switching circuit receives an image data signal. The expansion slot is electrically connected with the signal path switching circuit, wherein at least one external data processing chip is arranged in the expansion slot in a pluggable manner and is electrically connected with the expansion slot. The control circuit is electrically connected with the signal path switching circuit and the expansion slot, wherein when at least one external data processing chip is not electrically connected with the expansion slot, the control circuit controls the signal path switching circuit to transmit image data signals along a first path, and when at least one external data processing chip is electrically connected with the expansion slot, the control circuit controls the signal path switching circuit to transmit image data signals along a second path, wherein the first path does not comprise the expansion slot, and the second path comprises the first path, the expansion slot and at least one external data processing chip; and the back end data processing circuit is electrically connected with the expansion module control circuit and is used for receiving the image data signal from the first path or the second path. The light valve is electrically connected with the rear-end data processing circuit to receive the processed image data signal, and the processed image data signal is converted into an image through the projection lens to be projected onto the screen.
Based on the above, the expansion module control circuit and the operation method thereof according to the embodiment of the invention determine the processing path of the data signal by determining whether the expansion slot has been installed with at least one external data processing chip. When the expansion slot is not provided with the external data processing chip, the control circuit can control the signal path switching circuit to transmit the data signal along the first path, and the first path does not comprise the expansion slot. When the expansion slot is provided with the external data processing chip, the control circuit can control the signal path switching circuit to transmit the data signal along a second path, wherein the second path comprises a first path, the expansion slot and at least one external data processing chip. The image processing circuit in the projection device of the embodiment of the invention comprises the expansion module control circuit.
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
[ description of the drawings ]
Fig. 1 is a block diagram of a projection apparatus and a screen according to an embodiment of the invention.
FIG. 2 is a block diagram of an image processing circuit when an external data processing chip is not provided, in accordance with one embodiment of the present invention.
FIG. 3 is a block diagram of an image processing circuit when an external data processing chip is installed according to the embodiment of FIG. 2.
FIG. 4 is a block diagram of an image processing circuit when an external data processing chip is provided, according to another embodiment of the present invention.
FIG. 5 is a block diagram of an image processing circuit when an external data processing chip is provided, according to another embodiment of the present invention.
FIG. 6 is a block diagram of an image processing circuit when an external data processing chip is provided, according to another embodiment of the present invention.
FIG. 7 is a flow chart of a method of operation for the expansion module control circuit according to an embodiment of the invention.
[ notation ] to show
100: projection device
102: image processing circuit
104: light valve
106: projection lens
110: control circuit of expansion module
120: back-end data processing circuit
130: front-end data processing circuit
210. 410, 510, 610: control circuit
212: memory device
220. 420, 440, 520, 620: signal path switching circuit
230. 430, 450, 530, 540, 550: expansion slot
300. 310, 320: external data processing chip
C: pin configuration
D0, D, D1, D2, D', Df: data signal
PB: projection light beam
P1: first path
P2: second path
S: selection signal
SC: screen
S710, S720, S730, S740: and (5) carrying out the following steps.
[ detailed description ] embodiments
Fig. 1 is a block diagram of a projection apparatus and a screen according to an embodiment of the invention. Referring to fig. 1, a projection apparatus 100 includes an image processing circuit 102, a light valve 104, and a projection lens 106. The projection apparatus 100 generates a projection beam PB according to the image data signal to display a projection image on the screen SC.
The image processing circuit 102 at least comprises an expansion module control circuit 110 and a back-end data processing circuit 120. In fig. 1, the image processing circuit 102 may also optionally include a front-end data processing circuit 130. The front-end data processing circuit 130 is used to perform front-end image processing on the image data signal, such as adjusting the size of the projected image, but the invention is not limited thereto. In this specification, the image data signal received by the front-end data processing circuit 130 is represented by a data signal D0, and the result of the data signal D0 processed by the front-end data processing circuit 130 is represented by a data signal D; in embodiments that do not include front-end data processing circuit 130, the image data signal received by expansion module control circuit 110 is represented by data signal D. The expansion module control circuit 110 receives the data signal D from the front-end data processing circuit 130, and the expansion module control circuit 110 selects a processing path of the data signal D according to the expansion state. Through different processing paths, the data signal D goes through different image processing flows.
In the embodiment, the expansion module control circuit 110 can selectively transmit the data signal D along the first path or the second path. When the data signal D passes through the expansion module control circuit 110 along the first path, the back-end data processing circuit 120 receives the data signal D from the expansion module control circuit 110; when the data signal D passes through the expansion module control circuit 110 along the second path, the back-end data processing circuit 120 receives the processed result of the data signal D from the expansion module control circuit 110, which is represented by the data signal D'. In this specification, the path (e.g., the first path or the second path) refers to each electronic component through which the image data signal passes, and the first path refers to data transmission of the image data signal via the front-end data processing circuit 130, the signal path switching circuit 220, and the back-end data processing circuit 120, for example, but the present invention is not particularly limited thereto.
The back-end data processing circuit 120 is electrically connected to the expansion module control circuit 110, and is configured to receive the data signal D or the processed data signal D 'from the first path or the second path and perform a back-end image processing thereon to generate a data signal Df (a result of the back-end image processing on the data signal D or the data signal D'). The light valve 104 is electrically connected to the back-end data processing circuit 120 to receive the data signal Df, and convert the processed data signal Df into an image through the projection lens 106 to be projected onto the screen SC, for example, control each reflective element (not shown) on the light valve 104 according to the data signal Df, and convert the illumination beam (not shown) into an image beam to form an image, but the invention is not limited thereto.
Fig. 2 is a block diagram of an image processing circuit when an external data processing chip is not mounted according to an embodiment of the present invention, and fig. 3 is a block diagram of an image processing circuit when an external data processing chip is mounted according to the embodiment of fig. 2. Referring to fig. 2 and 3, the embodiments of fig. 2 and 3 can be applied to the expansion module control circuit 110 of fig. 1. The following further describes an embodiment of the expansion module control circuit 110 selecting the image processing path of the data signal D according to the expansion state.
The expansion module control circuit 110 includes a control circuit 210, a signal path switching circuit 220 and an expansion slot 230. The control circuit 210 is a hardware device such as a Central Processing Unit (CPU), a Microprocessor (Microprocessor), or a Microcontroller (MCU), and is electrically connected to the signal path switching circuit 220 and the expansion slot 230. The control circuit 210 is further electrically connected to the front-end data processing circuit 130 and controls the front-end image processing of the front-end data processing circuit 130, such as indicating the size of the projected image, but the invention is not limited thereto. In some embodiments, the image processing circuit 102 may omit the front-end data processing circuit 130.
The signal path switching circuit 220 receives the data signal D and is electrically connected to the expansion slot 230 and the back-end data processing circuit 120. At least one external data processing chip, such as the external data processing chip 300 shown in fig. 3, is removably or hot-pluggable mounted on the expansion slot 230 and electrically connected to the expansion slot 230. The external data processing chip 300 has an image processing function, such as an image Warping (Warping) function, an image Blending (Blending) function, a Motion estimation and Motion Compensation (Motion estimation and Motion Compensation) function, a Frame Rate Converter (Frame Rate Converter) function, and the like. It should be noted that the present invention does not limit the number of the expansion slots 230 and the signal path switching circuit 220 and the number and functions of the external data processing chips, wherein the expansion slot may be a single expansion slot or include a plurality of expansion slots.
In fig. 2, an external data processing chip (not shown) is not inserted into the expansion slot 230, that is, the external data processing chip is not electrically connected to the expansion slot 230, the control circuit 210 controls the signal path switching circuit 220 to transmit the data signal D along the first path P1, that is, the control circuit 210 controls the signal path switching circuit 220 to transmit the data signal D along the first path P1. The first path P1 in fig. 2 includes the front-end data processing circuit 130, the signal path switching circuit 220 and the back-end data processing circuit 120, but the first path P1 does not include the expansion slot 230, so that the signal path switching circuit 220 delivers the data signal D to the back-end data processing circuit 120 when the data signal D is transmitted along the first path P1.
In fig. 3, the external data processing chip 300 is inserted into the expansion slot 230, that is, the external data processing chip 300 is electrically connected to the expansion slot 230, the control circuit 210 controls the signal path switching circuit 220 to transmit the data signal D along the second path P2, that is, the control circuit 210 controls the signal path switching circuit 220 to transmit the data signal D along the second path P2, wherein the second path P2 includes the first path P1, the expansion slot 230 and the external data processing chip 300. The result of the data signal D processed by the external data processing chip 300 is represented by a data signal D'. When the data signal D is transmitted along the second path P2, the signal path switching circuit 220 transmits the data signal D' processed by the external data processing chip 300 to the back-end data processing circuit 120 through the expansion slot 230 and the signal path switching circuit 220 again.
It should be noted that the expansion module control circuit 110 is not limited to be used in a projection device or an image processing circuit, and the expansion module control circuit 110 may be applied to other video playback devices or processing circuits of other electronic devices. The data signal D received by the expansion module control circuit 110 is not limited to an image data signal, but may be other types of data signals. By arranging the expansion module control circuit 110, when the external data processing chip 300 is added, the expansion module control circuit 110 can change the processing path of the data signal D and transmit the data signal to the newly added external data processing chip 300 for further data processing, so that the processing circuit can rapidly improve the efficiency by inserting the external data processing chip 300, or the processing circuit can generate effect differentiation by applying the external data processing chips 300 with different functions. In short, the processing circuit with the expansion module control circuit 110 is suitable for motherboards of electronic devices with different specifications or requirements, and has the advantage of modularization.
Further, in the present embodiment, the control circuit 210 provides the selection signal S to the signal path switching circuit 220 corresponding to the pin configuration C of the expansion slot 230, and the signal path switching circuit 220 selects the data signal D to be transmitted along the first path P1 or the second path P2 according to the selection signal S. The control circuit 210 may include a Memory 212, such as a Random Access Memory (RAM), for storing a look-up table corresponding to various pin configurations of the expansion slot 230. The control circuit 210 may output the selection signal S according to the look-up table and the pin configuration C of the expansion slot 230. For example, the control circuit 210 may receive the pin configuration C of the expansion slot 230 and obtain the current pin configuration status of the expansion slot 230 according to the pin configuration C, but the invention is not limited thereto. Through the lookup table, the control circuit 210 can determine whether the expansion slot 230 is installed with the external data processing chip 300 according to the pin configuration C. Furthermore, the control circuit 210 can determine the type or function of the external data processing chip 300 by using the lookup table and the pin configuration C, and determine the sequence of transmitting the data signal D to the external data processing chips according to the pin configuration status of each expansion slot 230 when a plurality of external data processing chips are installed. The signal path switching circuit 220 may be implemented by a Field Programmable Gate Array (FPGA), and adjusts a processing path of the data signal D according to the selection signal S.
FIG. 4 is a block diagram of an image processing circuit when an external data processing chip is provided, according to another embodiment of the present invention. Referring to fig. 4, the embodiment of fig. 4 can also be applied to the expansion module control circuit 110 of fig. 1. In fig. 4, the expansion module control circuit 110 has two signal path switching circuits 420 and 440 and corresponding expansion slots 430 and 450. The control circuit 410 can determine whether the expansion slots 430 and 450 are installed with external data processing chips from each pin configuration C. The control circuit 410 transmits a corresponding selection signal S to the signal path switching circuits 420 and 440 respectively to control whether the data signal D is to change the transmission path.
When neither of the expansion slots 430 and 450 is installed with an external data processing chip, the control circuit 410 controls the signal path switching circuit 420 to transmit the data signal D along a first path (not shown), i.e., the data signal D is transmitted to the back-end data processing circuit 120 through the signal path switching circuits 420 and 440, but not through the expansion slots 430 and 450.
When the expansion slot 430 is installed with the external data processing chip 300 and the expansion slot 450 is installed with the external data processing chip 310, the signal path switching circuit 420 and the signal path switching circuit 440 sequentially transmit the data signal D to the external data processing chip 300 and the external data processing chip 310 through the expansion slot 430 and the expansion slot 450 according to the selection signal S. Specifically, the signal path switching circuit 420 and the signal path switching circuit 440 change the transmission path of the data signal D to the second path P2. The data signal D passes through the expansion slot 430 and the external data processing chip 300, and the external data processing chip 300 receives the data signal D and outputs a processed data signal D1. The signal path switching circuit 420 receives and outputs the data signal D1. The signal path switching circuit 440 also changes the transmission path of the data signal D1 to a second path P2, such that the data signal D1 passes through the expansion slot 450 and the external data processing chip 310, the external data processing chip 310 receives the data signal D1 and outputs a processed data signal D ', the data signal D ' is again transmitted back to the signal path switching circuit 440, and the signal path switching circuit 440 receives and outputs the data signal D '. The result of the data signal D1 processed by the external data processing chip 310 is represented as a data signal D'.
When one of the expansion slot 430 and the expansion slot 450 is installed with an external data processing chip, for example, the expansion slot 430 is installed with the external data processing chip 300, and the expansion slot 450 is not electrically connected to the external data processing chip 310. The signal path switching circuit 420 and the signal path switching circuit 440 change the transmission path of the data signal D according to the selection signal S to a transmission path (not shown) that allows the data signal D to pass through the expansion slot 430 and the external data processing chip 300 but not through the expansion slot 450.
FIG. 5 is a block diagram of an image processing circuit when an external data processing chip is provided, according to another embodiment of the present invention. Referring to fig. 5, the embodiment of fig. 5 can also be applied to the expansion module control circuit 110 of fig. 1. In fig. 5, the signal path switching circuit 520 is electrically connected to a plurality of serial expansion slots 530, 540 and 550.
When none of the expansion slots 530, 540, 550 is inserted into the external data processing chip, the control circuit 510 controls the signal path switching circuit 520 to transmit the data signal D along a first path (not shown), that is, the data signal D is transmitted to the back-end data processing circuit 120 through the signal path switching circuit 520 and does not pass through the expansion slots 530, 540, 550.
When the expansion slots 530, 540, 550 are respectively installed with the external data processing chip 300, the external data processing chip 310, and the external data processing chip 320, the signal path switching circuit 520 sequentially transmits the data signal D to the external data processing chips 300, 310, 320 along the second path P2 through the expansion slots 530, 540, 550 according to the selection signal S. Specifically, the external data processing chip 300 receives the data signal D through the expansion slot 530 and processes the data signal D to output the data signal D1 to the expansion slot 540, and the external data processing chip 310 receives the data signal D1 through the expansion slot 540 and processes the data signal D1 to output the data signal D2 to the expansion slot 550. The external data processing chip 320 receives the data signal D2 through the expansion slot 550 and processes the data signal D2 to output a data signal D'. The data signal D 'is sequentially transmitted back to the signal path switching circuit 520 through the expansion slots 550, 540, 530, and the signal path switching circuit 520 transmits the data signal D' to the back-end data processing circuit 120. However, in other embodiments, when all of the expansion slots 530, 540, 550 are installed or only partially installed with an external data processing chip, the control circuit 510 may transmit the data signal D to the external data processing chip capable of performing electrical connection according to each pin configuration C.
FIG. 6 is a block diagram of an image processing circuit when an external data processing chip is provided, according to another embodiment of the present invention. Referring to fig. 6, the embodiment of fig. 6 can also be applied to the expansion module control circuit 110 of fig. 1. In FIG. 6, a plurality of external data processing chips 300, 310, 320 can be simultaneously accommodated in the expansion slot 630. When none of the expansion slots 630 is inserted into the external data processing chip, the control circuit 610 controls the signal path switching circuit 620 to transmit the data signal D along a first path (not shown), that is, the data signal D is transmitted to the back-end data processing circuit 120 through the signal path switching circuit 620 and does not pass through the expansion slot 630. When the expansion slot 630 is plugged with an external data processing chip, the signal path switching circuit 620 sequentially transmits the data signal D to the external data processing chips 300, 310, and 320 along the second path P2 through the expansion slot 630 according to the selection signal S, and the result after being processed by the external data processing chips 300, 310, and 320 is represented by a data signal D'. The data signal D' is further transmitted to the back-end data processing circuit 120 through the expansion slot 630 and the signal path switching circuit 620. However, the invention is not limited thereto, in other embodiments, one or two external data processing chips can be selectively inserted into the expansion slot 630, and the expansion slot 630 sequentially transmits the data signal D to the inserted external data processing chips.
FIG. 7 is a flow chart of a method of operation for the expansion module control circuit according to an embodiment of the invention. The method of operation of fig. 7 is applicable to the embodiments of fig. 1-6. In step S710, a data signal is received through the signal path switching circuit. In step S720, the control circuit determines whether at least one external data processing chip is removably installed in the expansion slot and electrically connected thereto. If at least one external data processing chip is installed in the expansion slot, go to step S730, otherwise go to step S740. In step S740, the signal path switching circuit is controlled by the control circuit to transmit the data signal along a first path, where the first path does not include the expansion slot. In step S730, the control circuit controls the signal path switching circuit to transmit the data signal along a second path, where the second path includes the first path, the expansion slot and at least one external data processing chip. In addition, the operation method of the embodiment of the invention can be obtained from the description of the embodiment of fig. 1 to 6 to obtain sufficient teaching, suggestion and implementation description, and thus, the description is not repeated.
In summary, the expansion module control circuit and the operation method thereof of the present invention have expansion slots. The external data processing chip can be arranged in the expansion slot in a pluggable manner, and the path of the data signal is changed through the signal path switching circuit. The invention selectively provides additional data processing function or achieves upgrading effect through simple architecture. When the expansion slot is provided with an external data processing chip, the expansion module control circuit can automatically change the processing path of the data signal so as to simplify the expansion flow. Through the control circuit of the expansion module, a producer or a user can determine whether to install an external data processing chip to change the operation function and the flow of the processing circuit according to different requirements. The projection device comprises the expansion module control circuit. The invention utilizes the modularization mode to increase the application flexibility of the processing circuit.
Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.
Claims (11)
1. An expansion module control circuit, comprising a signal path switching circuit, an expansion slot and a control circuit, wherein:
the signal path switching circuit receives a data signal;
the expansion slot is electrically connected with the signal path switching circuit, wherein at least one external data processing chip is arranged in the expansion slot in a pluggable manner and is electrically connected with the expansion slot; and
the control circuit is electrically connected with the signal path switching circuit and the expansion slot,
wherein, when none of the at least one external data processing chip is electrically connected to the expansion slot, the control circuit controls the signal path switching circuit to transmit the data signal along a first path, and when the at least one external data processing chip is electrically connected to the expansion slot, the control circuit controls the signal path switching circuit to transmit the data signal along a second path,
the first path does not include the expansion slot, and the second path includes the first path, the expansion slot and the at least one external data processing chip.
2. The expansion module control circuit of claim 1, wherein the signal path switching circuit is electrically connected to a back-end data processing circuit, wherein the signal path switching circuit transmits the data signal to the back-end data processing circuit when the data signal is transmitted along the first path, and transmits the data signal processed by the at least one external data processing chip to the back-end data processing circuit when the data signal is transmitted along the second path.
3. The expansion module control circuit of claim 1, wherein the control circuit provides a selection signal to the signal path switching circuit corresponding to the pin configuration of the expansion slot, and the signal path switching circuit selects to transmit the data signal along the first path or the second path according to the selection signal.
4. The expansion module control circuit of claim 3, wherein the control circuit comprises a memory storing a look-up table for various pin configurations corresponding to the expansion slots, and the control circuit outputs the selection signal according to the look-up table and the pin configurations of the expansion slots.
5. The expansion module control circuit of claim 3, wherein the at least one external data processing chip comprises a first external data processing chip and a second external data processing chip, and the signal path switching circuit sequentially transmits the data signals to the first external data processing chip and the second external data processing chip through the expansion slot according to the selection signal.
6. An operating method for an expansion module control circuit, the operating method comprising:
receiving a data signal through a signal path switching circuit;
judging whether at least one external data processing chip is arranged in the expansion slot in a pluggable manner and is electrically connected with the expansion slot through the control circuit;
when the at least one external data processing chip is not electrically connected with the expansion slot, the control circuit controls the signal path switching circuit to transmit the data signal along a first path; and
when the at least one external data processing chip is electrically connected with the expansion slot, the control circuit controls the signal path switching circuit to transmit the data signal along a second path, wherein the first path does not include the expansion slot, and the second path includes the first path, the expansion slot and the at least one external data processing chip.
7. The operating method according to claim 6, wherein the data signal is transferred to a back-end data processing circuit through the signal path switching circuit when the data signal is transmitted along the first path, and the data signal processed by the at least one external data processing chip is transferred to the back-end data processing circuit through the signal path switching circuit when the data signal is transmitted along the second path.
8. The method of operation of claim 6, further comprising:
providing a selection signal to the signal path switching circuit by the control circuit in a pin configuration corresponding to the expansion slot, and selecting to transmit the data signal along the first path or the second path according to the selection signal by the signal path switching circuit.
9. The operating method of claim 8, wherein the step of providing the selection signal to the signal path switching circuit by the control circuit in the pin configuration corresponding to the expansion slot comprises:
the selection signal is provided through a lookup table stored in the control circuit and the pin configuration.
10. The method of operation of claim 8, further comprising:
determining, by the control circuit, a sequence of transmitting the data signal to a first external data processing chip and a second external data processing chip according to the pin configuration of the expansion slot, wherein the at least one external data processing chip includes the first external data processing chip and the second external data processing chip; and
and the signal path switching circuit sequentially transmits the data signals to the first external data processing chip and the second external data processing chip through the expansion slot according to the selection signal.
11. A projection device, comprising an expansion module control circuit, a back-end data processing circuit, a light valve and a projection lens, wherein:
the expansion module control circuit comprises a signal path switching circuit, an expansion slot and a control circuit, wherein:
the signal path switching circuit receives an image data signal;
the expansion slot is electrically connected with the signal path switching circuit, wherein at least one external data processing chip is arranged in the expansion slot in a pluggable manner and is electrically connected with the expansion slot; and
the control circuit is electrically connected with the signal path switching circuit and the expansion slot,
when the at least one external data processing chip is not electrically connected with the expansion slot, the control circuit controls the signal path switching circuit to transmit the image data signal along a first path, and when the at least one external data processing chip is electrically connected with the expansion slot, the control circuit controls the signal path switching circuit to transmit the image data signal along a second path, wherein the first path does not include the expansion slot, and the second path includes the first path, the expansion slot and the at least one external data processing chip; and
the back-end data processing circuit is electrically connected with the expansion module control circuit and is used for receiving the image data signal from the first path or the second path; and
the light valve is electrically connected with the rear-end data processing circuit to receive the processed image data signal, and the processed image data signal is converted into an image through the projection lens to be projected onto a screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911110849.3A CN112804465A (en) | 2019-11-14 | 2019-11-14 | Expansion module control circuit and operation method thereof and projection device |
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| CN201911110849.3A CN112804465A (en) | 2019-11-14 | 2019-11-14 | Expansion module control circuit and operation method thereof and projection device |
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| CN112804465A true CN112804465A (en) | 2021-05-14 |
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