CN110650324B - Projection equipment, projection system and projection method - Google Patents
Projection equipment, projection system and projection method Download PDFInfo
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- CN110650324B CN110650324B CN201810682578.8A CN201810682578A CN110650324B CN 110650324 B CN110650324 B CN 110650324B CN 201810682578 A CN201810682578 A CN 201810682578A CN 110650324 B CN110650324 B CN 110650324B
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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
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
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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]
-
- 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]
- H04N9/3179—Video signal processing therefor
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Controls And Circuits For Display Device (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Projection Apparatus (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The present invention provides a projection apparatus comprising: a signal input unit for receiving a video signal generated from a video source; the signal output unit is used for transmitting the video signal received by the signal input unit to a signal image processing unit; the signal image processing unit is used for receiving the video signal transmitted by the signal output unit, carrying out image processing on the video signal and carrying out projection display; the signal output unit is also used for outputting the video signal received by the signal input unit as an input signal of the signal input unit of another projection device after signal processing. The invention also provides a projection system and a projection method. Compared with the related art, the projection equipment, the projection system and the projection method are low in cost and convenient to use.
Description
Technical Field
The invention relates to the technical field of light and shadow display, in particular to a projection device, a projection system and a projection method.
Background
With the development of the intelligent era, light and shadow display becomes a development trend and is applied to more and more fields, such as projection equipment, and particularly, large-scale display, meeting, teaching and the like are applied more commonly.
In some special occasions, such as product exhibition, large conference room or auditorium, etc., a plurality of display screens (projection) need to be used, and the same content needs to be displayed synchronously, for example, the same content needs to be displayed by the display screens of different placement positions for a large lecture.
In the projection equipment in the prior art, an external VGA signal distributor is used for realizing one-path input and multi-path output. However, this method increases the cost, and the projector far from the distributor needs long wires for connection, which results in complicated and disordered wiring.
Therefore, it is necessary to provide a new projection apparatus, a new projection system and a new projection method to solve the above problems.
Disclosure of Invention
In view of the above disadvantages of the prior art, the present invention provides a projection apparatus, a projection system and a projection method with low cost and convenient use.
In order to solve the above technical problem, the present invention provides a projection apparatus, comprising: a signal input unit for receiving a video signal generated from a video source; the signal output unit is used for transmitting the video signal received by the signal input unit to a signal image processing unit; the signal image processing unit is used for receiving the video signal transmitted by the signal output unit, carrying out image processing on the video signal and carrying out projection display; the signal output unit is also used for outputting the video signal received by the signal input unit as an input signal of the signal input unit of another projection device after signal processing.
Preferably, the signal output unit comprises a line field signal control unit with a line field signal buffer control chip, an RGB signal control unit with an RGB video signal driver chip, a first output unit and a second output unit; the video signal received by the signal input unit is processed by the line field signal control unit and the RGB signal control unit to generate a line field signal and an RGB signal, the first output unit outputs the line field signal and the RGB signal to the signal image processing unit, and the second output unit outputs the line field signal and the RGB signal to a signal input unit of another projection device.
Preferably, the video source reads an internal data instruction of an internal storage chip of the signal image processing unit through a main chip of the signal input unit, and transmits RED, GREEN and BLUE signals corresponding to the RGB signals in the video signal to an image signal receiving end of the main chip of the signal input unit according to the internal data instruction; meanwhile, the video source transmits a signal corresponding to the line and field signal in the video signal to a line and field signal receiving end of a main chip of the signal input unit, and the signal image processing unit performs image processing on the received RED signal, GREEN signal, BLUE signal and the line and field signal and then performs projection display.
Preferably, signals corresponding to the line and field signals in the video signals are further transmitted to the line and field signal buffer control chip through a main chip of the signal input unit, and are transmitted to the second output unit for output after being processed by the line and field signal buffer control chip.
Preferably, the RED signal, the GREEN signal and the BLUE signal in the video signal are transmitted to the RGB video signal driver chip through the main chip of the signal input unit, and are output through the second output unit after being processed by the RGB video signal driver chip.
Preferably, the signal input unit and the second output unit of the signal output unit are both standard VGA female socket ports.
The invention also provides a projection system, which comprises at least two projection devices provided by the invention, wherein the signal input unit of the first projection device is used for being connected with a video source, and the second output unit of the first projection device is used for being connected with the signal input unit of the second projection device.
Preferably, the second output unit of the first projection device is connected with the signal input unit of the second projection device through a VGA cable.
The invention also provides a projection method, and the projection system provided by the invention comprises the following steps:
electrically connecting the signal input unit of the first projection device with a video source to obtain a video signal;
electrically connecting the second output unit of the first projection device with a signal input unit of a second projection device, wherein a signal output by the second output unit of the first projection device is used as an input of the second projection device;
and synchronously projecting and displaying the video signals of the video source through the signal image processing unit of the first projection device and the signal image processing unit of the second projection device.
Compared with the related art, the projection equipment, the projection system and the projection method of the invention add a signal output unit in the projection equipment, and the signal output unit is used for transmitting the video signal received by the signal input unit to the signal image processing unit and carrying out projection display through the image processing unit; meanwhile, the signal output unit is used for outputting the received video signal after signal processing as an input signal of the signal input unit of the other projection device, and the projection device can receive the input of the double VGA signal and output the VGA signal; the projection system can conveniently realize the function of synchronous display of a plurality of projection devices in series connection, avoids additional signal switching control equipment and wires, and is low in cost and convenient and quick to use.
Drawings
The present invention will be described in detail below with reference to the accompanying drawings. The foregoing and other aspects of the invention will become more apparent and more readily appreciated from the following detailed description, taken in conjunction with the accompanying drawings. In the drawings:
FIG. 1 is a block diagram of a projection apparatus according to the present invention;
FIG. 2 is a diagram of the overall circuit structure of the projection apparatus of the present invention;
FIG. 3 is a circuit diagram of a signal input unit and a signal image processing unit of the projection apparatus according to the present invention;
FIG. 4 is a circuit diagram of a line-field signal control unit of the projection apparatus according to the present invention;
FIG. 5 is a circuit configuration diagram of an RGB signal control unit of the projection apparatus of the present invention;
FIG. 6 is a circuit diagram of a second output unit of the projection apparatus according to the present invention;
FIG. 7 is a block diagram of an application scenario of the projection system of the present invention;
FIG. 8 is a block diagram of a projection method according to the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
The embodiments/examples described herein are specific embodiments of the present invention, are intended to be illustrative of the concepts of the present invention, are intended to be illustrative and exemplary, and should not be construed as limiting the embodiments and scope of the invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include those which make any obvious replacement or modification of the embodiments described herein, and all of which are within the scope of the present invention.
Referring to fig. 1-2, a projection apparatus 100 according to the present invention includes a signal input unit 1(VGA1in), a signal image processing unit 2, and a signal output unit 3.
Referring to fig. 3, the signal input unit 1 includes a main chip IC 1in the projection device, and the signal input unit 1 is used for receiving a video signal (or an image signal) generated by a video source. The signal input unit 1 is a P1 port of the projection device 100, i.e. a standard VGA female socket port.
The signal image processing unit 2 includes an internal storage chip IC2, which is cpu. The signal image processing unit 2 is configured to receive the video signal transmitted by the signal input unit 1, perform image processing on the video signal, and perform projection display on the video signal.
The signal output unit 3 is used for transmitting the video signal received by the signal input unit 1 to the signal image processing unit 2; the signal output unit 3 is further configured to output the video signal received by the signal input unit 1 after signal processing, and output the video signal as an input signal of a signal input unit of another projection device. The above structure enables the projection device 100 to receive VGA signal input and output VGA signal; further, the projection system 100 can conveniently realize the function of synchronous display of multiple projection devices in series connection, so that additional signal switching control devices and wires are avoided, and the projection system is low in cost and convenient and fast to use.
As shown in fig. 3-5, the signal output unit 3 includes a line-field signal control unit 31 having a line-field signal buffer control chip IC3, an RGB signal control unit 32 having an RGB video signal driver chip IC4, a first output unit 33(VGA 1in) and a second output unit 34(VGA2 out).
The video signal received by the signal input unit 1 is processed by the line-field signal control unit 31 and the RGB signal control unit 32 to generate a line-field signal and an RGB signal, the first output unit 33 outputs the line-field signal and the RGB signal to the signal image processing unit 2, and the second output unit 34 outputs the line-field signal and the RGB signal to a signal input unit of another projection apparatus.
In this embodiment, it should be noted that the signal input unit 1 is a P1 terminal, is a standard VGA female socket port, and includes a main chip IC 1; the second output unit 34 is a P2 terminal, is a standard VGA female socket port, and includes a main chip IC 5; the internal storage chip IC2 is a 24LC02 chip, the line-field signal buffer control chip IC3 is a TC7WH125FUK chip, and the RGB video signal driver chip IC4 is an EL5306IUZ-T7 chip. Of course, the chip types are not limited to the above, and the above is only an example of the embodiment.
During operation, the video source reads an internal data instruction of the internal storage chip IC2 of the signal image processing unit 2 through the main chip IC1 of the signal input unit 1, and transmits video signals (i.e., RED signals, GREEN signals, and BLUE signals of RGB signals corresponding to the video signals) to an image signal receiving terminal of the main chip IC1 according to the internal data instruction, and simultaneously transmits the video signals (i.e., signals corresponding to the video signals and the line and field signals) to a line and field signal receiving terminal of the main chip IC1, and the signal image processing unit 2 performs image processing and projection display on the received video signals, i.e., received RED signals, GREEN signals, BLUE signals, and line and field signals.
Specifically, referring to fig. 3, for example, the video source is a computer, and is connected to the signal input unit 1 of the projection apparatus 100, i.e., the P1 port, through a VGA cable. The internal data instruction of the internal storage chip IC2 is read through the pins 15 and 12 of the main chip IC1 of the P1 port, and after the corresponding internal data instruction is read by the video source, the corresponding RED signal, GREEN signal and BLUE signal in the video signal are transmitted to the image signal receiving pin of the main chip IC1 through the pins 1, pins 2 and pins 3 of the main chip IC1, namely, the pins 1, pins 2 and pins 3 of the main chip IC 1.
The video source simultaneously sends necessary line field signals HS1 and VS 1in the video signals to line field signal receiving pins of the main chip IC1 through pins 13 and pins 14 of the main chip IC1 and resistors R10 and R11, namely pins 4 and pins 5 of the main chip IC 1.
To this end, the video signal of the video source is completely transmitted to the main chip IC1 of the projection device 100. The projection device 100 performs projection display after corresponding image processing, so as to achieve the purpose of displaying a video source image.
As shown in fig. 4, the line and field signals of the video signal are further transmitted to the line and field signal buffer control chip IC3 through the main chip IC1, processed by the line and field signal buffer control chip IC3, and transmitted to the second output unit 34 for output, and then used as a video source of another projection device.
Specifically, the line field signals HS1 and VS 1in the video signals of the video source are sent to the main chip IC1 through the P1 end, and are also sent to the line field signal buffer control chip IC3 through the P1 end, and the pins 1 and pin7 of the line field signal buffer control chip IC3 control whether the signals can be passed through, and are also connected to the CE, and the collector level of the triode Q1 is taken. Similarly, when CE is low, i.e. pin1 and pin7 of the line field signal buffer control chip IC3 are low, HS1 and VS1 line field signals can be output from pin3 and pin6 of the line field signal buffer control chip IC3, respectively, and sent to line field signals HS2 and VS2 of the P2 port, i.e. the second output unit 34 of the P2 port.
With continued reference to fig. 5-6, the RED signal, the GREEN signal and the BLUE signal of the video signal are transmitted to the RGB video signal driver IC4 through the main chip IC1, and are processed by the RGB video signal driver IC4 and then output through the second output unit 34.
Specifically, the RED signal, the GREEN signal, and the BLUE signal of the video source are simultaneously sent to the RGB video signal driver chip IC4 through P1 (the signal input unit 1), and the INA + terminal, the INB + terminal, and the INC + terminal of the RGB video signal driver chip IC4 respectively receive the 3 signals of the RED signal, the GREEN signal, and the BLUE signal, and are respectively output from the OUTA terminal, the OUTB terminal, and the OUTC terminal after being processed by the RGB video signal driver chip IC 4. And whether the output is controlled by CEA terminal, CEB terminal and CEC terminal (pin 2, pin4 and pin7 of IC4 respectively). The CEA terminal, the CEB terminal, the CEC terminal and the CE terminal are connected, the collector level of the Q1 triode is selected, when pin6 of the main chip IC1 outputs high level, the Q1 triode is conducted, according to the relevant principle, the level at the collector is set to be low level, the CE obtains low level, namely the CEA terminal, the CEB terminal and the CEC terminal obtain low level, and the RED signal, the GREEN signal and the BLUE signal can smoothly pass through and be output from the OUTA terminal, the OUTB terminal and the OUTC terminal. The RED signal, the GREEN signal and the BLUE signal are sent to the P2 port after passing through, that is, the pins 1, 2 and 3 correspond to the RED, GREEN and BLUE of the main chip IC5 included in the second output unit 34.
The P2 port of the projection device 100 can transmit the RED signal, the GREEN signal and the BLUE signal to the P1 port of another projection device as the input of the other projection device through the VGA cable, and the other projection device obtains the same RGB signals as the projection device 100; therefore, the RED signal, the GREEN signal and the BLUE signal are connected in series from one projection device to another projection device, and the like can be connected in series to a third projection device until more.
Referring to fig. 7, the present invention further provides a projection system 200, which includes at least two projection apparatuses 100, for example, X projection apparatuses 1-X. Two adjacent projection devices 100 (projection device 1 and projection device 2), wherein the signal input unit VGA in of the first projection device 1 is configured to be connected to a video source, the first output unit of the first projection device 1 is configured to project a display, and the second output unit of the first projection device 1 is connected to the signal input unit of the second projection device 2 and is used as an input of the second projection device 2. And so on, may be cascaded to the third projection device 3 up to the X-th projection device.
In this embodiment, the second output unit of the first projection device 1 of the projection system 200 is connected to the signal input unit of the second projection device 2 via the VGA cable.
Referring to fig. 8, the present invention also provides a projection method, and provides the projection system 200, because the detailed structures of the projection system 200 and the projection apparatus 100 included therein are described in detail in the above description, they are not repeated herein. The projection method comprises the following steps:
step S1, electrically connecting the signal input unit of the first projection device with a video source to acquire a video signal;
step S2, electrically connecting the second output unit of the first projection device with the signal input unit of the second projection device, as an input of the second projection device;
and step S3, synchronously projecting and displaying the video signals of the video source through the signal image processing unit of the first projection device and the signal image processing unit of the second projection device.
Compared with the related art, the projection equipment, the projection system and the projection method of the invention add a signal output unit in the projection equipment, and the signal output unit is used for transmitting the video signal received by the signal input unit to the signal image processing unit and carrying out projection display through the image processing unit; meanwhile, the signal output unit is used for outputting the received video signal after signal processing as an input signal of the signal input unit of the other projection device, and the projection device can receive VGA signal input and output VGA signal at the same time; the projection system can conveniently realize the function of synchronous display of a plurality of projection devices in series connection, avoids additional signal switching control equipment and wires, and is low in cost and convenient and quick to use.
It should be noted that the above-mentioned embodiments described with reference to the drawings are only intended to illustrate the present invention and not to limit the scope of the present invention, and it should be understood by those skilled in the art that modifications and equivalent substitutions can be made without departing from the spirit and scope of the present invention. Furthermore, unless the context indicates otherwise, words that appear in the singular include the plural and vice versa. Additionally, all or a portion of any embodiment may be utilized with all or a portion of any other embodiment, unless stated otherwise.
Claims (8)
1. A projection device, comprising:
a signal input unit, configured to receive a video signal generated by a video source, wherein the signal input unit includes a RED pin, a GREEN pin, a BLUE pin, an NC pin, a RETURN pin, an RGND pin, a GGND pin, a BGND pin, a VCC pin, an SGND pin, an ID0 pin, an SDA pin, an HSYNC pin, a VSYNC pin, and an SCL pin, the RED pin, the GREEN pin, and the BLUE pin are respectively connected in series with a resistor R1, a resistor R2, and a resistor R3, and are respectively configured to receive a RED signal, a GREEN signal, and a BLUE signal of the video source, the line field signals HS1 and VS1 of the video source are respectively input to the HSYNC pin and the VSYNC pin, and the RGND pin, the GGND pin, the BGND pin, the SGND pin, the ID0 pin, and the RETURN pin are grounded;
the signal output unit is used for transmitting the video signal received by the signal input unit to a signal image processing unit and outputting the processed video signal as an input signal of a signal input unit of another projection device, wherein the signal output unit comprises a line field signal control unit with a line field signal buffer control chip, an RGB signal control unit with an RGB video signal driver chip, a first output unit and a second output unit; the video signal received by the signal input unit is processed by the line-field signal control unit and the RGB signal control unit to generate a line-field signal and an RGB signal, the first output unit transmits the video signal received by the signal input unit to the signal image processing unit, and the second output unit outputs the line-field signal and the RGB signal to a signal input unit of another projection device;
the signal image processing unit is used for receiving the video signal transmitted by the signal output unit, carrying out image processing on the video signal and carrying out projection display on the video signal, and comprises a memory chip, wherein the memory chip comprises a VDD pin, a P/W pin, an SCL pin, an SDA pin, an A0 pin, an A1 pin, an A2 pin and a VSS pin, the SDA pin and the SCL pin of the signal input unit are respectively connected with the SDA pin and the SCL pin of the memory chip, a 5V power supply voltage is respectively connected with the SCL pin and the SDA pin of the memory chip through a resistor R5 and a resistor R6, the 5V power supply voltage is also connected with the VDD pin and the P/W pin, and the A0 pin, the A1 pin, the A2 pin and the VSS pin are all grounded;
the line field signal control unit further comprises a triode Q1, wherein a pin1 and a pin7 of the line field signal buffer control chip are both connected to a collector of the triode Q1, when the level of the collector is low, line field signals HS1 and VS1 are respectively output from a pin3 and a pin6 of the line field signal buffer control chip and are sent to line field signals HS2 and VS2 of the second output unit, wherein the collector of the triode Q1 is connected with a 5V supply voltage through a resistor R14, a base of the triode Q1 is connected with a resistor R15 in series, an emitter of the triode Q63 1 is grounded, and a resistor R16 is connected between the base and the emitter of the triode Q1;
the RED signal, the GREEN signal and the BLUE signal of the video source are simultaneously sent to the RGB video signal driver chip through the signal input unit, the INA + end, the INB + end and the INC + end of the RGB video signal driver chip respectively receive the 3 paths of signals of the RED signal, the GREEN signal and the BLUE signal and respectively output the signals from the OUTA end, the OUTB end and the OUTC end after being processed by the RGB video signal driver chip, the CEA end, the CEB end and the CEC end of the RGB video signal driver chip are connected with the collector electrode of the triode Q1, and when the collector electrode level of the triode Q1 is low level, the RED signal, the GREEN signal and the BLUE signal are respectively output to the main chip of the second output unit through the OUTA end, the OUTB end and the OUTC end.
2. The projection apparatus according to claim 1, wherein a video source reads an internal data command of an internal storage chip of the signal image processing unit through a main chip of the signal input unit, and transmits RED, GREEN, and BLUE signals corresponding to the RGB signals in the video signal to an image signal receiving terminal of the main chip of the signal input unit according to the internal data command; and simultaneously, the video source transmits a signal corresponding to the line and field signals in the video signal to a line and field signal receiving end of a main chip of the signal input unit.
3. The projection apparatus according to claim 1, wherein a signal corresponding to the line-field signal in the video signal is further transmitted to the line-field signal buffer control chip through the main chip of the signal input unit, and is processed by the line-field signal buffer control chip and then transmitted to the second output unit for output.
4. The projection apparatus as claimed in claim 1, wherein the RED signal, the GREEN signal and the BLUE signal of the video signal are transmitted to the RGB video signal driver chip through the main chip of the signal input unit, and are processed by the RGB video signal driver chip and then output through the second output unit.
5. The projection device of claim 1, wherein the signal input unit and the second output unit of the signal output unit are both standard VGA mother board ports.
6. A projection system comprising at least two projection devices as claimed in any of claims 1 to 5, wherein the signal input unit of a first projection device is adapted to be connected to a video source and the second output unit of the first projection device is adapted to be connected to the signal input unit of a second projection device.
7. The projection system of claim 6, wherein the second output unit of the first projection device is connected to the signal input unit of the second projection device via a VGA cable.
8. A method of projection providing a projection system as claimed in any one of claims 6 to 7, characterized in that the method comprises the steps of:
electrically connecting the signal input unit of the first projection device with a video source to obtain a video signal;
electrically connecting the second output unit of the first projection device with a signal input unit of a second projection device, wherein a signal output by the second output unit of the first projection device is used as an input of the second projection device;
and synchronously projecting and displaying the video signals of the video source through the signal image processing unit of the first projection device and the signal image processing unit of the second projection device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810682578.8A CN110650324B (en) | 2018-06-27 | 2018-06-27 | Projection equipment, projection system and projection method |
| PCT/CN2019/076650 WO2020001056A1 (en) | 2018-06-27 | 2019-03-01 | Projection device, projection system and projection method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810682578.8A CN110650324B (en) | 2018-06-27 | 2018-06-27 | Projection equipment, projection system and projection method |
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| CN110650324B true CN110650324B (en) | 2022-03-29 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0865210A2 (en) * | 1997-03-12 | 1998-09-16 | Texas Instruments Incorporated | Improvements in or relating to display systems |
| CN1310838A (en) * | 1999-05-27 | 2001-08-29 | 精工爱普生株式会社 | Projection display |
| CN1560698A (en) * | 2000-03-27 | 2005-01-05 | ������������ʽ���� | Menu image display method |
| CN105007440A (en) * | 2011-07-05 | 2015-10-28 | 精工爱普生株式会社 | Projector and control method for projector |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4211815B2 (en) * | 2006-08-08 | 2009-01-21 | セイコーエプソン株式会社 | Display device, multi-display system, image information generation method, image information generation program, and recording medium |
| CN101505389B (en) * | 2009-02-13 | 2011-10-12 | 深圳市纳宇电子有限公司 | Laser projection display apparatus and implementing method |
-
2018
- 2018-06-27 CN CN201810682578.8A patent/CN110650324B/en active Active
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- 2019-03-01 WO PCT/CN2019/076650 patent/WO2020001056A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0865210A2 (en) * | 1997-03-12 | 1998-09-16 | Texas Instruments Incorporated | Improvements in or relating to display systems |
| CN1310838A (en) * | 1999-05-27 | 2001-08-29 | 精工爱普生株式会社 | Projection display |
| CN1560698A (en) * | 2000-03-27 | 2005-01-05 | ������������ʽ���� | Menu image display method |
| CN105007440A (en) * | 2011-07-05 | 2015-10-28 | 精工爱普生株式会社 | Projector and control method for projector |
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| WO2020001056A1 (en) | 2020-01-02 |
| CN110650324A (en) | 2020-01-03 |
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