Projector

Projection device

The present invention relates to a projection device, and more particularly to a projection device that is simple in structure and easy to use.

With the improvement of living standards, consumers are paying more and more attention to visual enjoyment. Therefore, various types of image display products are constantly being introduced, such as televisions and projectors. In particular, the projector can play movies and briefing materials, and display products for images that are indispensable in life and work.

Please refer to the fourth figure, which is a schematic diagram of the general projector 6 connected to the computer 7. The general projector 6 has a control module 60, a display module 61, a power interface 62, an image signal interface 63 and a control signal interface 63. The power interface 62 is connected to the external power source 9 via the power cable 80 to receive the power of the external power source 9 and is converted and then transmitted to the control module 60.

The image signal interface 63 is connected to the corresponding image signal interface 70 of the computer 7 via the image signal cable 81 to receive the image signal sent by the computer 7 and transmitted to the control module 60. The general video signal interface 63 includes a VGA signal interface or an AV signal interface, and the general video signal cable 81 is a VGA cable or an AV cable.

The control signal interface 64 is connected to the corresponding control signal interface 71 of the computer 7 via the control signal cable 82 to receive the control signal sent from the computer 7 and transmitted to the control module 60. The general control signal interface 64 is an RS-232 signal interface, and the general control signal cable 82 is an RS-232 cable.

However, the general projector 6 has the following disadvantages: First, when the projector 6 is in operation, the power cable 80, the image signal cable 81, and the control signal cable 82 are simultaneously connected, which may cause the cable to be difficult to organize and easy to knot. The installation and disassembly time is longer; and the second: the projector 6 must have a power interface 62, a video signal interface 63, a control signal interface 64 and its corresponding connector (not shown), so the projector 6 The volume cannot be miniaturized.

The main purpose of the present invention is to provide a projection apparatus which is simple in structure and easy to use in view of the defects of the above-mentioned prior art.

In order to achieve the above object, the creative projection device is connected to the image signal generating device, and comprises a USB interface, a first conversion unit, a second conversion unit, an image display module and a voltage control module, and the USB interface is connected to the image signal generating device for receiving The differential signal signal and the power source sent by the image signal generating device, the first conversion unit is connected to the USB interface for receiving the differential mode signal and converting into a digital three primary color signal.

The second conversion unit is connected to the first conversion unit for receiving the digital three primary color signals and converting into a low voltage differential mode signal, and the image display module is connected to the second conversion unit for receiving the low voltage differential mode signal and receiving the received signal according to the received signal The low voltage differential mode signal displays an image, and the voltage control module is connected between the USB interface and the image display module to receive the power of the USB interface and change the voltage of the power supply, and send the changed voltage to the image display module.

Therefore, the projection device only needs to connect the image signal generating device through a USB cable to simultaneously receive the signal and the power source, which not only overcomes the shortcomings of the prior art, but also has the advantages of simple structure and easy use.

To clarify the technical content, structural features, objectives, and effects of the present invention, the embodiments are described in detail below with reference to the drawings.

The projection device 1 of the present invention can be connected to a video signal generating device such as a computer or a video player. In the present embodiment, the computer 2 is connected as an example for illustration.

Please refer to the first figure, which is a schematic diagram of the projection device 1 connected to the computer 2. The creation projection device 1 has a control module 10, an image display module 11 and a universal serial bus (USB) interface 12. The control module 10 is connected to the image display module 11 and the USB interface 12, and the USB interface 12 is connected to the first USB interface 20 of the computer 2 via the USB cable 3. The computer 2 can transmit power and signals to the projection device 1 through the first USB interface 20 and the USB cable 3, and the projection device 1 can also receive the power and signals sent by the computer 2 through the USB interface 12 and the USB cable 3.

Please refer to the second figure, which is a block diagram of the control module 10 of the present projection device 1. The control module 10 is provided with a micro processing unit 100, a first conversion unit 101, a second conversion unit 102, and a voltage control module 103. The switch module 104 and the drive module 105.

The first conversion unit 101 is connected to the USB interface 12 and the second conversion unit 102. The second conversion unit 102 is connected to the micro processing unit 100 and the image display module 11. The voltage control module 103 is connected to the USB interface 12, the micro processing unit 100, and the switch module. In the group 104, the switch module 104 is connected to the micro processing unit 100 and the image display module 11. The drive module 105 is connected to the USB interface 12, the micro processing unit 100 and the image display module 11, and the micro processing unit 100 is connected to the image display module 11.

The first converting unit 101 receives the differential signal sent by the USB module 12, and converts the differential mode signal into a digital three primary color (RGB) signal, and the second converting unit 102 receives the digital RGB signal sent by the first converting unit 101. The digital RGB signal is converted into a low voltage differential mode signal (LVDS) signal, and the LVDS signal is sent to the image display module 11, and the image display module 11 displays the image according to the received LVDS signal.

The voltage control module 103 receives the power generated by the USB module 12 to change its voltage and provides it to the switch module 104. The switch module 104 is used to transmit the changed voltage to the image display module 11 or to cut off the voltage. The driving module 105 receives the power generated by the USB module 12 to adjust the current and transmit the adjusted current to the image display module 11 to drive the light-emitting elements (not shown) of the image display module 11, for example, to emit light. Diode.

In a real implementation, the voltage control module 103 has a boosting unit and a step-down unit (not shown). The boosting unit boosts the voltage of the power supply from the USB module 12, and transmits the boosted power to the switch module 104. The buck unit reduces the voltage of the power supply from the USB module 12, and transmits the buck power to each module to provide a corresponding operating voltage to each module.

The micro-processing unit 100 sends a driving signal to the voltage control module 103 and the switch module 104 to simultaneously drive the voltage control module 103 and the switch module 104, so that the voltage control module 103 changes the voltage of the power supply from the USB module 12, and The switch module 104 is caused to transmit the changed voltage to the image display module 11, or the switch module 104 is turned off to transmit the voltage.

The micro processing unit 100 sends a control signal to the driving module 105 for controlling the driving module 105, so that the driving module 105 adjusts the received current according to the control signal, and transmits the adjusted current to the image display module 11 to The light emission luminance of the light emitting element of the image display module 11 is controlled. The micro processing unit 100 also sends a control signal to the second conversion unit 102 to control the operation of the second conversion unit 102.

In a specific implementation, in order to reduce the cost, reduce the volume, and improve the projection brightness, the image display module 11 may be selected as a single crystal liquid crystal display panel (Liquid Crystal OnSilicon, LCOS).

Please refer to the third figure, which is another schematic diagram of the projection device 1 connected to the computer 2. The USB interface 12 of the projection device 1 can be simultaneously connected to the first USB interface 20 and the second USB of the computer 2 by the USB divergence cable 4. In the interface 21, the computer 2 can transmit power and signals to the projection device 1 through the first USB interface 20, and only provide power to the projection device 1 through the second USB interface 21.

The first USB interface 20 and the second USB interface 21 can provide a larger current to the projection device 1 in parallel by the USB divergence cable 4. Therefore, the projection device 1 can select the image display module 11 having higher brightness to improve the projection brightness of the projection device 1.

In summary, the present projection device 1 only needs to simultaneously receive signals and power through the USB interface 12, and the differential mode signal sent from the USB interface 12 is converted into a digital RGB signal via the first conversion unit 101, and then via the second conversion unit 102. The digital RGB signal is converted into an LVDS signal and transmitted to the image display module 11 to display an image.

The power sent by the USB interface 12 is changed by the power control module 103 and sent to the switch module 104. The switch module 104 transmits the changed voltage to the image display module 11, or cuts off the voltage transfer. The driving module 105 is configured to adjust the current sent by the USB interface 12 and transmit the adjusted current to the image display module 11 to change the display brightness of the image display module 11.

The micro processing unit 100 sends a driving signal to the voltage control module 103 and the switch module 104 to drive or turn off the voltage control module 103 and the switch module 104, and the micro processing unit 100 sends a control signal to the second conversion unit 102 and the driving module. 105, to control the operation of the second conversion unit 102 and the driving module 105.

Therefore, the present projection device 1 only needs to connect the first USB interface 20 or the second USB interface 21 of the computer 2 through a USB cable 3 or a USB divergent cable 4 to simultaneously receive signals and power, not only overcoming the prior art. The shortcomings are more simple in structure and easy to use.

<p>1. . . Projection device</p><p>10. . . Control module</p><p>100. . . Micro processing unit</p><p>101. . . First conversion unit</p><p>102. . . Second conversion unit</p><p>103. . . Voltage control module</p><p>104. . . Switch module</p><p>105. . . Drive module</p><p>11. . . Image display module</p><p>12. . . USB interface</p><p>2. . . computer</p><p>20. . . First USB interface</p><p>twenty one. . . Second USB interface</p><p>3. . . USB cable</p><p>4. . . USB divergent cable</p>

The first figure is a schematic diagram of the connection of the creation projection device to the computer.

The second figure is a block diagram of the control module of the present projection device.

The third figure is another schematic diagram of the creation of the projection device connected to the computer.

The fourth picture is a schematic diagram of a conventional projector connected to a computer.