CN111314630A - Display apparatus and display method thereof - Google Patents

Abstract

A display apparatus and a display method thereof. The method comprises the steps of converting a plurality of image input signals into a plurality of converted image signals which accord with a preset image specification, wherein the plurality of image input signals comprise a plurality of image signals with different specifications, and the plurality of converted image signals have a plurality of same display parameters. At least one of the converted image signals is selected as an image output signal. And displaying the image picture according to the image output signal. The display equipment of the invention can immediately display the image picture of the switched image signal source.

Description

Display device and display method thereof

technical field

The present invention relates to an electronic device, and more particularly, to a display device and a display method thereof.

Background technique

In projector products, there are many types of input image formats, such as VideoGraphics Array (VGA) signal, Composite Video (Composite Video) signal, Serial Digital Interface (SDI) signal, digital video Interface (Digital Visual Interface, DVI) signal, High Definition Multimedia Interface (High Definition Multimedia Interface, HDMI), HDBT signal and so on. A problem that often existed in the past is that when switching between different video signal sources, it takes several seconds or even nearly ten seconds to capture the video signal source, which makes the displayed video screen change to a black screen or blue screen without video content. The user needs to wait for a period of time to see the switched image screen, which reduces the convenience of using the product.

The "Background Art" paragraph is only used to help understand the content of the present invention, so the content disclosed in the "Background Art" paragraph may contain some known technologies that are not known to those skilled in the art. The content disclosed in the "Background Art" paragraph does not represent the content or the problem to be solved by one or more embodiments of the present invention, nor does it represent that it has been known or recognized by those skilled in the art before the application of the present invention.

SUMMARY OF THE INVENTION

The present invention provides a display device and a display method thereof, which can improve the situation that the image picture of the switched image signal source cannot be displayed immediately when switching between different image signal sources, and can improve the convenience of use of the display device.

Other objects and advantages of the present invention can be further understood from the technical features disclosed in the present invention.

In order to achieve one or part or all of the above objectives or other objectives, an embodiment of the present invention provides a display device including an image format conversion circuit, a programmable switching circuit, a display unit and a control circuit. The image format conversion circuit receives a plurality of video input signals, and converts the plurality of video input signals into a plurality of converted video signals conforming to a preset video standard, wherein the plurality of video input signals includes a plurality of video signals of different specifications, and the plurality of converted video signals Signals have the same multiple display parameters. The programmable switching circuit is coupled to the image standard converting circuit, and selects at least one of the converted image signals as the image output signal. The control circuit is coupled to the programmable switching circuit and the display unit, and controls the display unit to display the image frame according to the image output signal.

The present invention also provides a display method for a display device, comprising the following steps. Converting a plurality of video input signals into a plurality of converted video signals conforming to a preset video specification, wherein the plurality of video input signals include video signals of various specifications, and the plurality of converted video signals have the same plurality of display parameters. At least one of the converted video signals is selected as the video output signal. Display the image screen according to the image output signal.

Based on the above, the embodiment of the present invention converts a plurality of video input signals into a plurality of converted video signals conforming to a predetermined video specification, and selects at least one of the plurality of converted video signals as the video output signal. The video signals all have the same display parameters. Therefore, when switching video signal sources, it is not necessary to spend time confirming the video format and display parameters of the video signal source. Ease of use of the device.

In order to make the above-mentioned features and advantages of the present invention more obvious and easy to understand, the following embodiments are given and described in detail with the accompanying drawings as follows.

Description of drawings

FIG. 1 is a schematic diagram of a display device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of a display device according to another embodiment of the present invention.

FIG. 3 is a schematic diagram of a display device according to another embodiment of the present invention.

FIG. 4 is a flowchart of a display method of a display device according to an embodiment of the present invention.

Detailed ways

The foregoing and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or rear, etc., are only referring to the directions of the drawings. Accordingly, the directional terms used are illustrative and not limiting of the present invention.

FIG. 1 is a schematic diagram of a display device according to an embodiment of the present invention, please refer to FIG. 1 . The display device includes an image format converting circuit 102 , a programmable switching circuit 104 , a control circuit 106 and a display unit 108 . The programmable switching circuit 104 may be implemented, for example, in a field programmable logic gate array, but is not limited thereto. The display unit 108 may be, for example, a liquid crystal display, a projection device, or other display device, wherein when the display unit 108 is a projection device, the display unit 108 may include a spatial light modulator (eg, a digital micromirror device (DMD) or a silicon Liquid Crystal on Silicon (LCOS) panel.

The video format conversion circuit 102 can receive a plurality of video input signals S1-Sn, and convert the video input signals S1-Sn into a plurality of converted video signals S1'-Sn' conforming to a predetermined video standard, wherein the predetermined video standard can be, for example, RGB format, of course, is not limited to this. The video input signals S1-Sn may include various video signals of different specifications, such as VGA signal, composite video signal, SDI signal, DVI signal, HDMI, HDBT signal, etc., and the converted video signal converted by the video standard conversion circuit 102 S1'-Sn' have the same multiple display parameters, and the multiple display parameters may include, for example, resolution, picture update rate, and frame synchronization signal, but are not limited thereto. The programmable switching circuit 104 can select at least one of the converted video signals S1'-Sn' as the video output signal. The control circuit 106 controls the display unit 108 to display an image frame according to the image output signal provided by the programmable switching circuit 104. For example, when the display unit 108 is a projection device, the control circuit 106 can control the spatial light modulator to perform light modulation according to the image output signal. The projection image is displayed on the projection screen. Wherein, when the programmable switching circuit 104 selects two or more from the plurality of converted video signals S1'-Sn' as the video output signal, the control circuit 106 can perform zooming and superimposing of the video images on the selected plurality of converted video signals and image processing such as arrangement, and control the display unit 108 to display video images in display modes such as a picture-in-picture mode, a split-screen mode, and a side-by-side screen mode.

In this way, by converting a plurality of video input signals into a plurality of converted video signals conforming to a preset video specification, and selecting at least one of the plurality of converted video signals as an image output signal, each converted video signal can have the same image format and display parameters, so the display device does not need to spend time to confirm the image format and display parameters of other video signal sources when switching the video signal source, but can immediately display the video image of the video signal source after switching, and improve the display device. ease of use.

FIG. 2 is a schematic diagram of a display device according to another embodiment of the present invention, please refer to FIG. 2 . In this embodiment, the image format converting circuit 102 may include a first converting unit 202 and a second converting unit 204 , and the second converting unit 204 is coupled to the first converting unit 202 and the programmable switching circuit 104 . The first converting unit 202 is used for converting the video input signals S1-Sn entering the video format converting circuit 102 into the first format video signals SF1-SFn having the same video format, and the second converting unit 204 is used for converting the first format video signals The signals SF1-SFn are converted into a plurality of second-format video signals conforming to the predetermined video specification as converted video signals S1'-Sn', wherein the first-format video signals SF1-SFn can be, for example, HDMI signals, and the converted video signal S1' ~Sn' can be, for example, an RGB signal (an image signal of the second format), but is not limited to this. The second conversion unit 204 in this embodiment may include a plurality of conversion chips 204-1 to 204-M, and the conversion chips 204-1 to 204-M may be, for example, chips for converting HDMI signals into RGB signals, which can receive The first format video signals SF1 ˜SFn output from the first converting unit 202 . For example, each of the conversion chips 204-1 to 204-M of the second conversion unit 204 can receive two first-format image signals (though not limited to this, in other embodiments, it can also receive one or more first-format image signals). One format video signal), and selects and outputs one of the two second format video signals to the programmable switching circuit 104 . The programmable switching circuit 104 can quickly select and switch the second format image signal (ie, the converted image signal) provided by the conversion chips 204-1 to 204-M, and output it to the control circuit 106, so as to perform the process as described in the above-mentioned embodiment. Perform subsequent image processing and screen display.

By first converting the video input signals S1-Sn into first-format video signals SF1-SFn having the same video format, and then converting the first-format video signals SF1-SFn into a plurality of second-format images conforming to a preset video specification As the converted video signals S1'-Sn', the converted video signals S1'-Sn' can have the same video format and explicit parameters (such as resolution, frame update rate, frame synchronization signal, etc.), so the control circuit 106 There is no need to reconfirm the setting of the video signal switched by the programmable switching circuit 104, and the effect of fast and seamless switching can be achieved.

FIG. 3 is a schematic diagram of a display device according to another embodiment of the present invention, please refer to FIG. 3 . Compared with the embodiment in FIG. 2 , the image format converting circuit 102 of this embodiment further includes a matrix switching circuit 302 , which is coupled between the first converting unit 202 and the second converting unit 204 . The conversion unit 204 may include a plurality of conversion chips 304-1 to 304-M. The matrix switching circuit 302 can receive a plurality of first format video signals SF1 ˜SFn from the first converting unit 202 , switch and select the first format video signals SF1 ˜SFn, and output the plurality of converting signals to the second converting unit 204 Chips 304-1 to 304-M. Further, the matrix switching circuit 302 may include one or more HDMI2.0 matrix IC chips for receiving the first format image signals SF1 ˜SFn (ie, the first format image signals SF1 ˜SFn) from the first converting unit 202 . HDMI signal), but not limited to this, each matrix integrated circuit chip of the matrix switching circuit 302 can be coupled to the second conversion unit 204, and the matrix integrated circuit chips can also be coupled to each other, so as to facilitate the conversion of the first The video signals SF1 ˜SFn of a format are switched and outputted to the conversion chips 304 - 1 ˜ 304 -M of the second conversion unit 204 .

The conversion chips 304 - 1 ˜ 304 -M can be, for example, chips for converting HDMI signals into RGB signals, which can receive the first format image signals SF1 ˜SFn (that is, HDMI signals) selected and output from the matrix switching circuit 302 . ). For example, each of the conversion chips 304-1 to 304-M can receive two first-format image signals (but not limited to this, and can also receive more first-format image signals in other embodiments), and After converting the first format image signal into the second format image signal (ie, the RGB signal), one of the two second format image signals is selected and outputted to the programmable switching circuit 104 . The programmable switching circuit 104 can quickly select and switch the second format image signal (ie, the converted image signal) provided by the conversion chips 304-1 to 304-M, and output it to the control circuit 106, so as to perform the process as described in the above-mentioned embodiment. Perform subsequent image processing and screen display.

FIG. 4 is a flowchart of a display method of a display device according to an embodiment of the present invention. It can be known from the above embodiments that the display method of the display device may include at least the following steps. First, convert a plurality of video input signals into a plurality of converted video signals conforming to a preset video specification, wherein the plurality of video input signals include a plurality of video signals of different specifications, and the plurality of converted video signals have the same plurality of display parameters ( S402), wherein the plurality of display parameters may include, for example, resolution, picture update rate, and frame synchronization signal. In some embodiments, a plurality of video input signals may be converted into a plurality of first format video signals, and then a plurality of first format video signals may be converted into a plurality of second format video signals conforming to the predetermined video specification as The plurality of converted image signals (for example, at least two first format image signals are converted into at least two second format image signals through any one of a plurality of conversion chips, and a device that outputs the at least two second format image signals is selected. One of them), wherein the first format image signal may be, for example, a high-definition multimedia interface signal, and the second format image signal may be, for example, an RGB signal, but not limited to this. Next, at least one of the converted image signals is selected as the image output signal (S404), and then an image frame is displayed according to the image output signal (S406), wherein the image frame can be, for example, in a picture-in-picture mode, a split-picture mode, and Display in explicit mode such as side-by-side mode.

To sum up, in the embodiments of the present invention, by converting a plurality of video input signals into a plurality of converted video signals conforming to a predetermined video specification, and selecting at least one of the plurality of converted video signals as the video output signal, the Make each converted video signal have the same video format and display parameters, so when switching video signal sources, the display device does not need to spend time to confirm the video format and display parameters of the video signal source, and can immediately display the switched video signal The image screen of the source can achieve the effect of seamless switching, and improve the convenience of use of the display device.

However, the above are only the preferred embodiments of the present invention, and should not limit the scope of the present invention, that is, all simple equivalent changes and modifications made according to the claims of the present invention and the content of the invention are all It still falls within the scope of the patent of the present invention. Furthermore, any embodiment or claim of the present invention is not required to achieve all of the objects or advantages or features disclosed herein. In addition, the abstract and the title of the invention are only used to assist the retrieval of patent documents, and are not used to limit the scope of rights of the present invention. Furthermore, the first, second, etc. mentioned in the specification are only used to represent the names of the components, and are not used to limit the upper or lower limit of the number of components.

Claims (16)

1. A display device, characterized in that the display device comprises an image specification conversion circuit, a programmable switching circuit, a display unit and a control circuit; wherein, The video format conversion circuit receives a plurality of video input signals, and converts the plurality of video input signals into a plurality of converted video signals conforming to a predetermined video standard, wherein the plurality of video input signals includes a plurality of images of different specifications signal, the plurality of converted image signals have the same plurality of display parameters; The programmable switching circuit is coupled to the image format converting circuit, and selects at least one of the converted image signals as an image output signal; and The control circuit is coupled to the programmable switching circuit and the display unit, and controls the display unit to display an image frame according to the image output signal. 2. The display device according to claim 1, wherein the image size conversion circuit comprises: a first converting unit, converting the plurality of video input signals into a plurality of video signals in a first format; and A second converting unit, coupled to the first converting unit and the programmable switching circuit, converts the plurality of first format video signals into a plurality of second format video signals conforming to the predetermined video specification as the the plurality of converted video signals. 3. The display device according to claim 2, wherein the second conversion unit comprises a plurality of conversion chips, and the image size conversion circuit further comprises: a matrix switching circuit, coupled between the first converting unit and the second converting unit, the matrix switching circuit receives the plurality of first format image signals from the first converting unit, and switches selecting the plurality of first format video signals and outputting them to the plurality of conversion chips, each conversion chip converts at least two first format video signals into at least two second format video signals, and selecting and outputting the at least two first format video signals One of the two second format video signals to the programmable switching circuit. 4 . The display device according to claim 2 , wherein the second conversion unit comprises a plurality of conversion chips, and each conversion chip converts at least two video signals of the first format into at least two video signals of the second format. 5 . , and select to output one of the at least two second format image signals to the programmable switching circuit. 5 . The display device according to claim 1 , wherein the first format video signal is a high-definition multimedia interface signal, and the second format video signal is an RGB signal. 6 . 6 . The display device according to claim 1 , wherein the plurality of display parameters include a resolution, a picture update rate, and a frame synchronization signal. 7 . 7 . The display device according to claim 1 , wherein the programmable switching circuit comprises a field programmable logic gate array. 8 . 8 . The display device according to claim 1 , wherein the explicit modes of the display unit include a picture-in-picture mode, a split-picture mode, and a side-by-side picture mode. 9 . 9 . The display device according to claim 1 , wherein the display device comprises a projection device, and the display unit comprises a spatial light modulator. 10 . 10. A display method for a display device, comprising: Converting the plurality of video input signals into a plurality of converted video signals conforming to a predetermined video specification, wherein the plurality of video input signals include video signals of various specifications, and the plurality of converted video signals have the same multi-dimensional display parameters; selecting at least one of the plurality of converted image signals as an image output signal; and An image frame is displayed according to the image output signal. 11. The display method of a display device according to claim 10, characterized in that, comprising: converting the plurality of video input signals into a plurality of first format video signals; and Converting the plurality of first format video signals into a plurality of second format video signals conforming to the predetermined video specification as the plurality of converted video signals. 12. The display method of a display device according to claim 11, wherein the display device comprises a plurality of conversion chips, and the display method of the display device comprises: The plurality of first format video signals are converted into the plurality of second format video signals by the plurality of conversion chips, and each conversion chip converts at least two first format video signals into at least two second format video signals video signal, and select to output one of the at least two second format video signals. 13. The display method of a display device according to claim 10 or 11, wherein the first format image signal is a high-definition multimedia interface signal, and the second format image signal is an RGB signal. 14 . The display method of a display device according to claim 10 or 11 , wherein the plurality of display parameters include resolution, picture update rate, and frame synchronization signal. 15 . 15. The display method of a display device according to claim 10 or 11, wherein the explicit modes of the display device include a picture-in-picture mode, a split-picture mode, and a side-by-side picture mode. 16. The display method of a display device according to claim 10 or 11, wherein the display device comprises a projection device.

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