CN111314630B

CN111314630B - Display apparatus and display method thereof

Info

Publication number: CN111314630B
Application number: CN201811509410.3A
Authority: CN
Inventors: 吴建均; 彭致勋; 陈旭川; 陈锜贤
Original assignee: Coretronic Corp
Current assignee: Coretronic Corp
Priority date: 2018-12-11
Filing date: 2018-12-11
Publication date: 2023-03-03
Anticipated expiration: 2038-12-11
Also published as: CN111314630A

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 an image picture according to the image output signal. The display equipment can immediately display the image picture of the switched image signal source.

Description

Display apparatus and display method thereof

Technical Field

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

Background

In the projector products, there are many types of formats of input images, such as a Video Graphics Array (VGA) signal, a Composite Video (Composite Video) signal, a Serial Digital Interface (SDI) signal, a DVI (Digital Visual Interface) signal, a High Definition Multimedia Interface (HDMI), and an HDBT signal. A problem that often exists in the past is that when switching different video signal sources, it takes several seconds or even about ten seconds to capture the video signal source, so that the displayed video image is converted into a black screen or blue screen image without video content, and a user needs to wait for a period of time to see the switched video image, thereby reducing the convenience of the product.

The background section is only provided to help the understanding of the present invention, and therefore, the disclosure in the background section may include some known technologies that do not constitute the knowledge of those skilled in the art. The statements in the "background" section do not represent the disclosure, or the problems, as one or more embodiments of the present invention would solve, nor are they representative of what is known or appreciated by those of ordinary skill in the art prior to the present application.

Disclosure of Invention

The 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 different image signal sources are switched, and can improve the use convenience of the display device.

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

To achieve one or a part of or all of the above or other objects, an embodiment of the invention provides a display device, which includes an image specification converting circuit, a programmable switching circuit, a display unit, and a control circuit. The image specification conversion circuit receives a plurality of image input signals and converts the 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. The programmable switching circuit is coupled to the image specification conversion circuit and selects at least one of the converted image signals as an image output signal. The control circuit is coupled with the programmable switching circuit and the display unit and controls the display unit to display the image picture according to the image output signal.

The invention also provides a display method of the display device, which comprises the following steps. 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.

Based on the above, the embodiment of the invention converts the plurality of image input signals into the plurality of converted image signals conforming to the predetermined image specification, and selects at least one of the plurality of converted image signals as the image output signal, and since each of the converted image signals has the same display parameter, it is not necessary to spend time to confirm the image format and the display parameter of the image signal source when switching the image signal source, and the image frame of the switched image signal source can be immediately displayed, thereby improving the convenience of the display device.

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.

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 Description

The foregoing and other features and advantages of the invention will be apparent from the following, more particular description of preferred embodiments of the invention, as illustrated in the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting.

Fig. 1 is a schematic diagram of a display device according to an embodiment of the invention, please refer to fig. 1. The display device includes an image specification conversion circuit 102, a programmable switching circuit 104, a control circuit 106, and a display unit 108, wherein the programmable switching circuit 104 is coupled to the image specification conversion circuit 102 and the control circuit 106, and the control circuit 106 is further coupled to the display unit 108. The programmable switching circuit 104 may be implemented, for example, in a field programmable 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 apparatus, wherein when the display unit 108 is a projection Device, the display unit 108 may include a spatial light modulator (e.g., a Digital Micromirror Device (DMD) or a Liquid Crystal On Silicon (LCOS) panel.

The video specification converting circuit 102 receives the plurality of video input signals S1 to Sn, and converts the video input signals S1 to Sn into a plurality of converted video signals S1 'to Sn' conforming to a predetermined video specification, such as, but not limited to, RGB format. The video input signals S1 to Sn may include video signals of different specifications, such as VGA signals, composite video signals, SDI signals, DVI signals, HDMI, HDBT signals, etc., and the converted video signals S1 'to Sn' converted by the video specification conversion circuit 102 have the same display parameters, such as resolution, frame update rate and frame synchronization signal, but not limited thereto. The programmable switching circuit 104 can select at least one of the plurality of converted video signals S1 'to Sn' as a video output signal. The control circuit 106 controls the display unit 108 to display an image 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, so as to display a projection image on a projection screen. When the programmable switching circuit 104 selects two or more of the plurality of converted video signals S1 'to Sn' as video output signals, the control circuit 106 performs image processing such as scaling, superimposing, and arranging of video screens on the selected plurality of converted video signals, and controls the display unit 108 to display the video screens in a display mode such as a picture-in-picture mode, a split-screen mode, and a parallel-screen mode.

Therefore, the display equipment can immediately display the image picture of the switched image signal source without spending time to confirm the image formats and the display parameters of other image signal sources when switching the image signal source, thereby improving the use convenience of the display equipment.

Fig. 2 is a schematic diagram of a display device according to another embodiment of the invention, please refer to fig. 2. In the present embodiment, the image specification converting circuit 102 may include a first converting unit 202 and a second converting unit 204, wherein the second converting unit 204 is coupled to the first converting unit 202 and the programmable switching circuit 104. The first conversion unit 202 is used to convert the video input signals S1 to Sn entering the video specification conversion circuit 102 into first format video signals SF1 to SFn having the same video format, and the second conversion unit 204 is used to convert the first format video signals SF1 to SFn into a plurality of second format video signals conforming to the predetermined video specification as converted video signals S1 'to Sn', where the first format video signals SF1 to SFn may be HDMI signals, for example, and the converted video signals S1 'to Sn' may be RGB signals (second format video signals), but not limited thereto. The second conversion unit 204 of the present 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 may receive the first format video signals SF1 to SFn output from the first conversion 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 (although not limited thereto, in other embodiments, one or more first format image signals can also be received), and selectively output one of the two second format image signals to the programmable switching circuit 104. The programmable switching circuit 104 can rapidly select and switch the second format video signals (i.e., the converted video signals) provided by the converting chips 204-1 to 204-M, and output the second format video signals to the control circuit 106 for the subsequent image processing and image display as described in the above embodiments.

By converting the image input signals S1 to Sn into the first format image signals SF1 to SFn having the same image format, and then converting the first format image signals SF1 to SFn into a plurality of second format image signals conforming to the predetermined image specification as the converted image signals S1 'to Sn', the converted image signals S1 'to Sn' can have the same image format and explicit parameters (such as resolution, frame update rate, frame synchronization signal, etc.), so that the control circuit 106 does not need to re-confirm the settings of the image signals switched by the programmable switching circuit 104, and can achieve the effect of fast and seamless switching.

Fig. 3 is a schematic diagram of a display device according to another embodiment of the invention, please refer to fig. 3. Compared to the embodiment shown in fig. 2, the image specification converting circuit 102 of the present embodiment further includes a matrix switching circuit 302 coupled between the first converting unit 202 and the second converting unit 204, and the second converting unit 204 of the present embodiment may include a plurality of converting chips 304-1 to 304-M. The matrix switching circuit 302 receives the first format video signals SF1 through SFn from the first converting unit 202, switches and selects the first format video signals SF1 through SFn, and outputs the selected first format video signals to the converting chips 304-1 through 304-M of the second converting unit 204. Further, the Matrix switch circuit 302 may include one or more Matrix integrated circuit (Matrix IC) chips of HDMI2.0 for receiving the first format video signals SF1 through SFn (i.e., HDMI signals) from the first converter unit 202, but not limited thereto, each of the Matrix IC chips of the Matrix switch circuit 302 may be coupled to the second converter unit 204, and the Matrix IC chips may be coupled to each other for selectively switching and outputting the first format video signals SF1 through SFn to the converter chips 304-1 through 304-M of the second converter unit 204.

The conversion chips 304-1 to 304-M may be, for example, chips for converting HDMI signals into RGB signals, which can receive the first format video signals SF1 to SFn (i.e., HDMI signals) selected and output from the matrix switching circuit 302. For example, each of the conversion chips 304-1 to 304-M may receive two first format image signals (although not limited thereto, in other embodiments, more first format image signals may be received), and after converting the first format image signals into second format image signals (i.e. RGB signals), select one of the two second format image signals to be output to the programmable switching circuit 104. The programmable switching circuit 104 can rapidly select and switch the second format video signals (i.e., the converted video signals) provided by the conversion chips 304-1 to 304-M, and output the selected signals to the control circuit 106 for subsequent image processing and frame display as described in the above embodiments.

Fig. 4 is a flowchart of a display method of a display device according to an embodiment of the present invention. As can be seen from the above embodiments, the display method of the display device may include at least the following steps. First, a plurality of video input signals are converted into a plurality of converted video signals conforming to a predetermined 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 a plurality of identical display parameters (S402), wherein the plurality of display parameters may include, for example, a resolution, a frame rate, and a frame synchronization signal. In some embodiments, the image input signals may be converted into a plurality of first format image signals, and then the plurality of first format image signals are converted into a plurality of second format image signals conforming to the predetermined image 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 one of the at least two second format image signals is selected to be output), where the first format image signals may be, for example, high-quality multimedia interface signals, and the second format image signals may be, for example, RGB signals, but are not limited thereto. Then, at least one of the converted video signals is selected as a video output signal (S404), and a video frame is displayed according to the video output signal (S406), wherein the video frame can be displayed in an explicit mode such as a PIP mode, a SEPARATED FRAME mode, or a PARALLEL FRAME mode.

In summary, the embodiments of the present invention convert the plurality of image input signals into the plurality of converted image signals conforming to the predetermined image specification, and select at least one of the plurality of converted image signals as the image output signal, so that each of the converted image signals has the same image format and display parameters, and thus when switching the image signal source, the display device does not need to spend time to confirm the image format and display parameters of the image signal source, and can immediately display the image frame of the switched image signal source, thereby achieving the effect of seamless switching, and improving the convenience of the display device.

It should be understood that the above-mentioned embodiments are only preferred embodiments of the present invention, and that the scope of the present invention should not be limited thereby, and all the simple equivalent changes and modifications made by the claims and the summary of the invention should be included in the scope of the present invention. It is not necessary for any embodiment or claim of the invention to address or achieve all of the objects, advantages or features disclosed herein. In addition, the abstract and the title of the invention are provided for assisting the search of patent documents and are not intended to limit the scope of the invention. In addition, the first and second … and the like mentioned in the specification are only used for indicating the names of the components, and are not used for limiting the upper limit or the lower limit of the number of the components.

Claims

1. The display equipment is characterized by comprising an image specification conversion circuit, a programmable switching circuit, a display unit and a control circuit; wherein, the first and the second end of the pipe are connected with each other,

the image specification converting circuit receives a plurality of image input signals and converts the plurality of image input signals into a plurality of converted image signals conforming to a preset image specification, wherein the plurality of image input signals comprise a plurality of image signals with different specifications, the plurality of converted image signals have a plurality of same display parameters, the image specification converting circuit comprises a first converting unit and a second converting unit, and the first converting unit comprises:

the first conversion unit converts the plurality of image input signals into a plurality of first format image signals; and

the second conversion unit is coupled to the first conversion unit and the programmable switching circuit, and converts the plurality of first format image signals into a plurality of second format image signals meeting the preset image specification as the plurality of converted image signals, wherein the second conversion unit comprises a plurality of conversion chips, each conversion chip converts at least two first format image signals into at least two second format image signals, and selects and outputs one of the at least two second format image signals to the programmable switching circuit;

the programmable switching circuit is coupled with the image specification conversion circuit and selects at least one of the second format image signals provided by the conversion chips as an image output signal; and

the control circuit is coupled with the programmable switching circuit and the display unit and controls the display unit to display the image picture according to the image output signal.

2. The display device according to claim 1, wherein the image specification converting circuit further comprises:

the matrix switching circuit receives the plurality of first format image signals from the first conversion unit, switches and selects the plurality of first format image signals, and outputs the plurality of first format image signals to the plurality of conversion chips.

3. The display apparatus according to claim 1 or 2, wherein the first format image signal is an HDMI signal, and the second format image signal is an RGB signal.

4. The display device according to claim 1 or 2, wherein the plurality of display parameters include a resolution, a picture update rate, and a picture frame synchronization signal.

5. A display device as claimed in claim 1 or 2, wherein the programmable switching circuitry comprises a field programmable gate array.

6. The display device according to claim 1 or 2, wherein the display modes of the display unit include a picture-in-picture mode, a split picture mode, and a side-by-side picture mode.

7. A display device as claimed in claim 1 or 2, characterized in that the display device comprises projection means and the display unit comprises a spatial light modulator.

8. A display method of a display device, the display device comprising an image specification conversion circuit and a programmable switching circuit, the image specification conversion circuit comprising a first conversion unit and a second conversion unit, wherein the second conversion unit comprises a plurality of conversion chips, the display method of the display device comprising:

converting a plurality of image input signals into a plurality of converted image signals according with a preset image specification through the image specification conversion circuit, wherein the plurality of image input signals comprise a plurality of image signals with different specifications, the plurality of converted image signals have a plurality of same display parameters, the plurality of image input signals are converted into a plurality of first format image signals through the first conversion unit, the plurality of first format image signals are converted into a plurality of second format image signals according with the preset image specification through the second conversion unit to serve as the plurality of converted image signals, at least two first format image signals are converted into at least two second format image signals through each conversion chip, and one of the at least two second format image signals is selected to be output to the programmable switching circuit;

selecting at least one of the second format image signals provided by the conversion chips as an image output signal through the programmable switching circuit; and

and displaying an image picture according to the image output signal.

9. The method as claimed in claim 8, wherein the first format video signal is an HDMI signal, and the second format video signal is an RGB signal.

10. The display method of claim 8, wherein the plurality of display parameters comprise a resolution, a frame update rate, and a frame synchronization signal.

11. The display method of the display device according to claim 8, wherein the display modes of the display device include a picture-in-picture mode, a split picture mode, and a side-by-side picture mode.

12. The display device according to claim 8, wherein the display device includes a projection device.