TWI403888B - Power saving mode inspection method of display and inspection device thereof and inspection system - Google Patents

Abstract

A power saving mode inspection method of a display and an inspection device thereof and an inspection system are provided. The inspection device includes an image capturing unit, an image processing unit, and a differentiating unit. The display may display a test frame. The image capturing unit may take a picture of the test frame. The image processing unit is coupled to the image capturing unit, and processes the picture to obtain image information. The differentiating unit is coupled to the image processing unit, and receives default information which corresponds to the test frame, and then differentiates whether the display converts to a predetermined power saving mode or not according to the image information and the default information.

Description

Energy saving mode detecting method of display, detecting device and detecting system thereof

The present invention relates to a detection technique, and more particularly to a detection technique for discriminating whether a display enters a power saving mode.

Due to the global warming and the depletion of natural resources, many issues such as the decay of life on the earth and Icelandization have arisen. Therefore, how to reduce the waste of resources and protect the earth is a relatively important issue to be studied. According to the current lifestyle, digital display products surround everyone's side, such as computers, screens, projectors, TVs, etc. Therefore, while using digital display products, how to balance the use of power, and achieve energy saving and carbon saving, At present, digital display product manufacturers are jointly studying important topics.

There are many ways to achieve energy saving and carbon saving, such as Dynamic Power Management and Power Saving Mechanism. The practice is nothing more than analyzing the brightness and weight of the screen at the time of the screening. Enter the Power Saving Mode.

It may be possible to simply control the output energy of the display, but whether the display has correctly switched the output energy according to the mechanism setting, and enters the so-called energy-saving mode, but cannot quickly and comprehensively interpret and detect.

The invention provides an energy saving mode detecting method for a display, which can determine whether the display enters a preset energy saving mode.

The invention provides a detection system that can detect whether a display enters a preset energy saving mode.

The invention provides a detecting device for a display, which can determine whether the display enters a preset energy saving mode.

The invention provides a method for detecting an energy saving mode of a display, which comprises taking a test screen displayed by the display to obtain an image. In addition, image processing is performed on the above image to obtain image information. In addition, the display determines whether the display enters the preset energy saving mode according to the image information and the preset information corresponding to the test screen.

In an embodiment of the invention, the step of performing image processing on the image to obtain image information may include the following steps. Generate grayscale distribution information based on the image. In addition, a clustering algorithm can be performed on the gray scale distribution information to obtain at least one gray scale group. In addition, the center of gravity of the gray scale group can be analyzed, wherein the center of gravity of the gray scale group can be one of image information.

In an embodiment of the invention, the step of performing image processing on the image to obtain image information may include the following steps. Generate grayscale distribution information based on the image. In addition, the gray scale distribution information may be subjected to a grouping algorithm to obtain at least one gray level group. In addition, the specific gravity of the gray scale group may be analyzed, wherein the specific gravity of the gray scale group may be one of image information.

Viewed from another perspective, the present invention provides a detection system that includes a display and detection device. The detecting device comprises an image capturing unit, an image processing unit and a determining unit. The display can display a test screen. The image capturing unit can take the above test screen to obtain an image. The image processing unit is coupled to the image capturing unit to perform image processing on the image to obtain image information. The determining unit is coupled to the image processing unit, and can receive preset information corresponding to the test screen, and determine whether the display enters the preset energy saving mode according to the image information and the preset information.

In an embodiment of the invention, the image processing unit includes a bar graph unit, a grouping unit, and a center of gravity unit. The bar graph unit is coupled to the image capturing unit to generate gray scale distribution information according to the image provided by the image capturing unit. The grouping unit is coupled to the bar graph unit, and the clustering algorithm is performed on the gray scale distribution information to obtain at least one gray level group. The center of gravity unit is coupled to the grouping unit, and the center of gravity of the gray level group can be analyzed, wherein the center of gravity of the gray level group can be one type of image information.

In an embodiment of the invention, the image processing unit includes a bar graph unit, a grouping unit, and a center of gravity unit. The bar graph unit is coupled to the image capturing unit to generate gray scale distribution information according to the image provided by the image capturing unit. The grouping unit is coupled to the bar graph unit, and the clustering algorithm is performed on the gray scale distribution information to obtain at least one gray level group. The specific gravity unit is coupled to the grouping unit, and the specific gravity of the gray-scale group can be analyzed, wherein the specific gravity of the gray-scale group can be one of image information.

From another perspective, the present invention provides a display detection device including an image capture unit, an image processing unit, and a discrimination unit. The image capture unit can capture the test screen displayed by the display to obtain an image. The image processing unit is coupled to the image capturing unit to perform image processing on the image to obtain image information. The determining unit is coupled to the image processing unit, and can receive preset information corresponding to the test screen, and determine whether the display enters the preset energy saving mode according to the image information and the preset information.

Based on the above, the present invention can take a test image displayed by the display and perform image processing to obtain image information. In addition, according to the above image information and the preset information corresponding to the test screen, it can be determined whether the display enters the preset energy saving mode.

The above described features and advantages of the invention will be apparent from the following description.

The embodiment of the present invention introduces the concept of machine vision, and uses a photographing device such as a camera and a camera to simulate a picture seen by a human eye, and through a photographing screen, and then uses an image processing method to interpret a change in brightness and darkness of the screen, thereby checking Whether the display acts in accordance with the setting mechanism, thereby achieving rapid and convenient detection of the energy saving mode mechanism. The embodiments of the present invention are described in detail below with reference to the accompanying drawings, in which FIG.

1 is a schematic diagram of a detection system in accordance with an embodiment of the present invention. Referring to FIG. 1, the detection system 10 includes a display 20 and a detection device 30. The detecting device 30 may include an image capturing unit 40, an image processing unit 50, and a determining unit 60. The image processing unit 50 is coupled to the image capturing unit 40. The image capturing unit 40 is coupled to the determining unit 60. The display 20 is, for example, a liquid crystal display, but the invention is not limited thereto. In other embodiments, the display 20 may also be other types of displays, such as an organic light emitting diode display. In addition, the image capturing unit 40 is, for example, a conventional photographic element, but the invention is not limited thereto. In other embodiments, the image capturing unit 40 may also be a dynamic photographic element.

2 is a flow chart of a method for detecting an energy saving mode in accordance with an embodiment of the present invention. Referring to FIG. 1 and FIG. 2 together, first, in step S201, the image capturing unit 40 captures the test screen TF displayed on the display 20, and transmits the captured image CF to the image processing unit 50. More specifically, in the embodiment, the image capturing unit 40 can capture the overall image displayed on the display 20, but the invention is not limited thereto.

Then, in step S202, the image processing unit 50 performs image processing on the image CF, obtains the image information FI, and transmits the image information FI to the determining unit 60. Then, the determining unit 60 can receive the image information FI and the preset information PI corresponding to the preset screen TF, and determine whether the display 20 enters the preset energy saving mode according to the image information FI and the preset information PI (step S203). Steps S202 and S203 will be further described below.

3 is a schematic diagram of an embodiment of the image processing unit of FIG. 1. Referring to FIG. 3, in the embodiment, the image processing unit 50 may include a Histogram Unit 51, a grouping unit 52, and a center of gravity unit 53. The bar graph unit 51 is coupled to the image capturing unit 40. The grouping unit 52 is coupled to the bar graph unit 51. The center of gravity unit 53 is coupled to the grouping unit 52 and the determining unit 60.

4 is a flow chart of an embodiment of step S202 of FIG. 2. Referring to FIG. 3 and FIG. 4 together, in step S201, first, in step S401, the bar graph unit 51 generates gray scale distribution information DI according to the image CF. Then, in step S402, the grouping unit 52 performs a grouping algorithm on the grayscale distribution information DI to obtain at least one grayscale group GI. Further, in step S403, the centroid unit 53 analyzes the center of gravity of the gray scale group GI to generate the image information FI. The image information FI includes, for example, the center of gravity of the gray scale group GI described above. Next, the determining unit 60 can determine whether the display 20 enters the power saving mode according to the preset information PI and the image information FI including the center of gravity of the gray scale group GI.

More specifically, FIG. 5A is a schematic diagram of a test image in accordance with an embodiment of the present invention. FIG. 5B is a bar graph of a test image according to an embodiment of the invention. FIG. 5C is a bar graph of an image captured by an image capturing unit in a normal mode according to an embodiment of the invention. FIG. 5D is a bar graph of an image captured by an image capturing unit in a power saving mode according to an embodiment of the invention. In this embodiment, the test image TF displayed by the display 20 (as shown in FIG. 5A ) is composed of, for example, 80% dark gray scale and 20% bright gray scale, wherein the gray scale value of the dark gray scale is, for example, 0. The grayscale value of the bright grayscale is, for example, 255. The bar graph of the test image TF is shown in Fig. 5B.

When the display 20 is operated in the normal mode, the bar graph of the test image TF is similar to the bar graph of the image CF captured by the image capturing unit 40 (as shown in FIG. 5C). In contrast, when the display 20 is operated in the power saving mode, the display 20 will display the picture at a lower power, so the brightness of the displayed picture will be significantly darker, that is, the center of gravity of the gray bar group of the test image TF will be significantly The center of gravity of the gray-scale group of the bar graph higher than the image CF (Fig. 5D).

In this embodiment, it is assumed that the center of gravity of the bright gray level group in FIG. 5C is 240, the center of gravity of the bright gray level group in FIG. 5D is 120, and the preset information PI is 220. Since the test image TF is composed of 80% dark gray scale and 20% bright gray scale, in step S402, the grouping unit 52 obtains two gray scale groups, respectively, a bright gray level group and a dark gray level group. . After the center of gravity unit 53 analyzes the center of gravity of the bright gray level group of the captured image, the determining unit 60 can determine whether the center of gravity of the bright gray level group is greater than the preset information PI, and can determine whether the display 20 enters the power saving mode. When the center of gravity of the bright gray level group is greater than 220, it means that the display 20 enters the normal mode; conversely, when the center of gravity of the bright gray level group is less than 220, the display 20 enters the power saving mode. In this way, it is possible to easily detect whether the display 20 normally enters the power saving mode.

It is worth noting that in the prior art, when the digital analog converter and/or its back end circuit in the display fails, the display cannot enter the power saving mode correctly. The detection technique of this embodiment uses machine vision to detect whether the display 20 enters the power saving mode (whether the test screen can be normally displayed in the power saving mode), thereby improving the above-mentioned conventional defects and further discriminating the digital analog conversion Whether the device and / or its back-end circuit is faulty.

In addition, the technique of the present embodiment utilizes machine vision, and the detecting device 30 can detect the display 20 without contacting the display 20. Therefore, the detecting device 30 may be affected by ambient light to cause a detection result. FIG. 5E is a bar graph of an image captured by an image capturing unit in a power saving mode and the detecting device is affected by ambient light according to an embodiment of the invention. Fig. 5E is similar to Fig. 5D except that the brightness of each gray scale group in Fig. 5E is slightly increased due to the influence of ambient light. Assume that the center of gravity of the bright gray level group in FIG. 5E is 190. According to the above detection mode, the center of gravity of the bright gray level group in FIG. 5E is 190, which is still smaller than 220 of the preset information PI, so the discriminating unit 60 can still correctly discriminate that the display 20 enters the power saving mode. In other words, in the case where the intensity of the ambient light is not large, the detecting device 30 can correctly detect whether the display 20 enters the power saving mode.

Although the detection system, the detection device and the detection method have been drawn out in a possible form in the above embodiments, those skilled in the art should know that each manufacturer designs the detection system, the detection device and the detection method. Not the same, so the application of the invention is not limited to this possible type. In other words, it is in line with the spirit of the present invention as long as it is a test screen displayed on the display and it is judged whether the display enters the power saving mode through image processing and analysis. In the following, several embodiments will be described to enable those skilled in the art to further understand the spirit of the invention and to practice the invention.

In the above embodiment, FIG. 3 and FIG. 4 are only an alternative embodiment of the image processing unit and the processing flow thereof, and the present invention is not limited thereto. Those skilled in the art can also change the above embodiments as needed. For example, FIG. 6 is a schematic diagram of another embodiment of the image processing unit of FIG. 1. FIG. 7 is a flow chart of another embodiment of step S202 of FIG. 2. 6 is similar to FIG. 3 except that FIG. 6 replaces the center of gravity unit 53 of FIG. 3 with a specific gravity unit 54. Steps S701 and S702 in FIG. 7 are similar to steps S401 and S402 in FIG. 4, and details are not described herein again.

It is to be noted that, in step S703, the specific gravity unit 54 can analyze the specific gravity of the bright gray scale and the dark gray scale. For example, the specific gravity unit 54 can count the number of bright gray scales and dark gray scales according to preset gray scale values. The preset grayscale value is, for example, 220 in this embodiment. If the gray scale value of each pixel is greater than 220, it is regarded as a bright gray scale. If the gray scale value of each pixel is less than 220, it is regarded as a dark gray scale, so that the number of bright gray scales and dark gray scales can be counted. Obtain the specific gravity of the bright gray scale and the dark gray scale.

Next, the determining unit 60 can determine whether the display 20 enters the power saving mode according to the preset information PI and the number of bright gray levels counted by the specific gravity unit 54. In this embodiment, the preset information PI is, for example, 18% of the number of bright gray levels, and those skilled in the art can also change the preset information PI according to the needs thereof. In other words, if the determining unit 60 determines that the number of bright gray levels is greater than 18% of the preset information PI, it can be determined that the display 20 enters the normal mode; otherwise, if the determining unit 60 determines that the number of bright gray levels is less than 18% of the preset information PI , it can be determined that the display 20 enters the power saving mode. In this way, similar effects to the above embodiments can be achieved.

The test screen TF of FIG. 5A in the above embodiment is only an alternative embodiment, and those skilled in the art can also change the test screen TF according to the requirements. For example, Figure 8A is a schematic illustration of another test image in accordance with an embodiment of the present invention. 8B is a bar graph of another test image in accordance with an embodiment of the present invention. FIG. 8C is a bar graph of an image captured by an image capturing unit in a normal mode according to another embodiment of the present invention. In this embodiment, the test picture TF is composed of 80% bright gray scale and 20% dark gray scale. Those skilled in the art can achieve similar effects to the above embodiments as long as the preset information PI is changed corresponding to the test screen TF.

In step S201 of the above embodiment, the image capturing unit 40 captures the overall image displayed on the display 20, but it is only an alternative embodiment. In another embodiment, the image capturing unit 40 can also capture a partial image displayed on the display 20, so that similar effects to the above embodiments can be achieved.

In summary, the present invention can take a test image displayed by the display and perform image processing to obtain image information. In addition, according to the above image information and the preset information corresponding to the test screen, it can be determined whether the display enters the preset energy saving mode. Furthermore, embodiments of the invention have the following advantages:

1. Using machine vision to detect whether the display enters a power saving mode (whether or not the test screen can be normally displayed in the power saving mode), so that it is possible to further discriminate whether the digital analog converter and/or its back end circuit is faulty.

2. The detection device detects the display without touching the display.

3. In the case where the intensity of the ambient light is not large, the detecting device can correctly detect whether the display enters the power saving mode.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and those skilled in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

10. . . Detection Systems

20. . . monitor

30. . . Testing device

40. . . Image capture unit

50. . . Image processing unit

60. . . Discriminating unit

TF. . . Test screen

CF. . . Captured image

FI. . . Image information

PI. . . Default information

S201 to S203, S401 to S403, and S701 to S703. . . Steps of the energy saving mode detection method

DI. . . Gray scale distribution information

GI. . . Gray-scale group

51. . . Bar graph unit

52. . . Grouping unit

53. . . Center of gravity

54. . . Specific gravity unit

1 is a schematic diagram of a detection system in accordance with an embodiment of the present invention.

2 is a flow chart of a method for detecting an energy saving mode in accordance with an embodiment of the present invention.

3 is a schematic diagram of an embodiment of the image processing unit of FIG. 1.

4 is a flow chart of an embodiment of step S202 of FIG. 2.

FIG. 5A is a schematic diagram of a test image according to an embodiment of the invention.

FIG. 5B is a bar graph of a test image according to an embodiment of the invention.

FIG. 5C is a bar graph of an image captured by an image capturing unit in a normal mode according to an embodiment of the invention.

FIG. 5D is a bar graph of an image captured by an image capturing unit in a power saving mode according to an embodiment of the invention.

FIG. 5E is a bar graph of an image captured by an image capturing unit in a power saving mode and the detecting device is affected by ambient light according to an embodiment of the invention.

6 is a schematic diagram of another embodiment of the image processing unit of FIG. 1.

FIG. 7 is a flow chart of another embodiment of step S202 of FIG. 2.

8A is a schematic diagram of another test image in accordance with an embodiment of the present invention.

8B is a bar graph of another test image in accordance with an embodiment of the present invention.

FIG. 8C is a bar graph of an image captured by an image capturing unit in a normal mode according to another embodiment of the present invention.

S201～S203. . . Steps of the energy saving mode detection method

Claims (6)

A method for detecting an energy-saving mode of a display, comprising: capturing a test image displayed by the display to obtain an image; performing image processing on the image to obtain an image information; and correspondingly testing the image according to the image information a preset information for determining whether the display enters a preset power saving mode, wherein the step of performing the image processing on the image to obtain the image information comprises: generating a gray scale distribution information according to the image; Distributing the information to perform a grouping algorithm to obtain at least one gray level group; and analyzing the center of gravity of the gray level group, wherein the image information includes the center of gravity of the gray level group; or performing image processing on the image to obtain the image The step of information includes: generating a grayscale distribution information according to the image; performing a clustering algorithm on the grayscale distribution information to obtain at least one grayscale group; and analyzing the proportion of the grayscale group, wherein the image information includes The specific gravity of the above gray scale group. A detection system comprising: a display for displaying a test screen; A detecting device includes: an image capturing unit that captures the test image to obtain an image; an image processing unit coupled to the image capturing unit to perform an image processing on the image to obtain an image information; a discriminating unit coupled to the image processing unit, receiving a preset information corresponding to the test screen, and determining, according to the image information and the preset information, whether the display enters a preset energy saving mode, wherein the image processing unit The method includes: a long bar graph unit coupled to the image capturing unit, generating a gray scale distribution information according to the image; a grouping unit coupled to the bar graph unit, performing a clustering algorithm on the gray scale distribution information Obtaining at least one gray-scale group; and a centroid unit coupled to the grouping unit to analyze a center of gravity of the gray-scale group, wherein the image information includes a center of gravity of the gray-scale group. A detection system includes: a display for displaying a test screen; and a detecting device, comprising: an image capturing unit that captures the test image to obtain an image; and an image processing unit coupled to the image capturing unit Performing an image processing on the image to obtain an image information; and a discriminating unit coupled to the image processing unit to receive a preset information corresponding to the test screen, and according to the image information and the preset resource The image processing unit includes: a bar graph unit coupled to the image capturing unit to generate a gray scale distribution information according to the image; a group unit, coupled Connecting to the bar graph unit, performing a clustering algorithm on the gray scale distribution information to obtain at least one gray scale group; and a specific gravity unit coupled to the cluster unit to analyze the proportion of the gray scale group, wherein the image information Including the specific gravity of the above gray scale group. A display device includes: an image capturing unit that captures a test image displayed by the display to obtain an image; an image processing unit coupled to the image capturing unit to perform image processing on the image, Obtaining an image information; and a discriminating unit coupled to the image processing unit to receive a preset information corresponding to the test screen, and determining, according to the image information and the preset information, whether the display enters a preset energy saving The image processing unit includes: a bar graph unit coupled to the image capturing unit to generate a gray scale distribution information according to the image; a grouping unit coupled to the bar graph unit, the gray scale The distribution information is subjected to a grouping algorithm to obtain at least one gray level group; and a center of gravity unit coupled to the grouping unit to analyze the center of gravity of the gray level group, wherein the image information includes the center of gravity of the gray level group. A display detecting device comprising: An image capturing unit that captures a test image displayed on the display to obtain an image; an image processing unit coupled to the image capturing unit to perform an image processing on the image to obtain an image information; The determining unit is coupled to the image processing unit, and receives a preset information corresponding to the test screen, and determines, according to the image information and the preset information, whether the display enters a preset energy saving mode, wherein the image processing unit, The method includes: a long bar graph unit coupled to the image capturing unit, generating a gray scale distribution information according to the image; a grouping unit coupled to the bar graph unit, performing a clustering algorithm on the gray scale distribution information, Borrowing at least one gray-scale group; and a specific gravity unit coupled to the clustering unit to analyze the specific gravity of the gray-scale group, wherein the image information includes the specific gravity of the gray-scale group. An energy-saving mode detecting method for displaying a video obtained by capturing a test picture displayed on the display; the method comprising: generating a gray-scale distribution information according to the image; performing a clustering calculation on the gray-scale distribution information a method for obtaining at least one gray scale group; analyzing one of the center of gravity and the specific gravity of the gray scale group to obtain an image information; and determining whether the display enters a display according to the image information and a preset information corresponding to the test screen Preset energy saving mode.