KR101584336B1 - Embedded display port(eDP) image signal input device for inspection of UHD display panel - Google Patents

Embedded display port(eDP) image signal input device for inspection of UHD display panel Download PDF

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Publication number
KR101584336B1
KR101584336B1 KR1020150071111A KR20150071111A KR101584336B1 KR 101584336 B1 KR101584336 B1 KR 101584336B1 KR 1020150071111 A KR1020150071111 A KR 1020150071111A KR 20150071111 A KR20150071111 A KR 20150071111A KR 101584336 B1 KR101584336 B1 KR 101584336B1
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South Korea
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image
display panel
signal
video
inspection
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KR1020150071111A
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Korean (ko)
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최병철
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주식회사 지엔티시스템즈
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • H04N17/02—Diagnosis, testing or measuring for television systems or their details for colour television signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details

Abstract

The present invention relates to an image device signal input device for testing a display panel. The image device signal input device is used to input an embedded display port (eDP) image signal into the display panel in order to test the quality condition of an ultra-high resolution display panel. According to the present invention, the image device signal input device includes: an input unit which receives a command signal to input the image signal for testing the display panel; an image processor unit which generates and outputs the image signal for testing the display panel when the command signal is received through the input unit; an eDP interface unit which receives the image signal for testing the display panel from the image processor unit; and an eDP output unit which transmits the image signal for testing the display panel which is received from the eDP interface unit to the display panel.

Description

{Embedded display port (eDP) image signal input device for inspection of UHD display panel}

The present invention relates to a video signal input apparatus for inspecting an ultra-high resolution display panel, and more particularly to a video signal input apparatus for inspecting an ultra high resolution display panel for inputting an embedded display port video signal into the display panel. To an input device.

Display panels are generally used in a variety of electronic products such as televisions, computers, mobile phones, and portable communication devices. Such a display panel is manufactured through a number of processes, and when defects are generated on the surface thereof, the performance is adversely affected, so that a process of finally testing the display panel is required.

In addition, since the display panel has been developed to be large in size and high resolution, interfaces for signal transmission between the video source and the display panel have been upgraded, and accordingly, IT products such as notebooks are being replaced with display ports (DP) . The DP interface performs an interface function to transmit a video signal for inspection to a display panel. With the recent release of the new version of the Embedded Display Port (eDP) specification, the eDP specification is being applied as an interface specification designed for devices with embedded display devices such as notebook PCs, tablets, netbooks, and all-in-one desktop PCs.

In the related art, a video signal is input to a display panel for quality inspection of a display panel, and quality is measured using an image displayed on the display panel. Conventionally, in the case of a signal input for a display panel inspection, for example, in Japanese Patent Laid-Open No. 10-1076478, a GVIF (Gigabit Video InterFace) module and an LVDS (Low Voltage Differential Signaling) To perform a display panel inspection. As another example, the LVDS module receives an image data inspection signal including an image signal, a clock signal, and a synchronization signal, converts the image data into a low voltage differential signal (LVDS), and outputs the low voltage differential signal (LVDS) A display transmission circuit for receiving a signal and performing buffering and amplifying retransmission is disclosed.

However, in the related art, since an LVDS module is required to input a video signal for inspection to a display panel, a process of adding an LVDS module is required and the cost increases accordingly. In addition, since the LVDS signal is transmitted to the display panel in the prior art, it is difficult to apply it to the display panel having the eDP interface, and a separate module for converting the LVDS signal into the eDP signal is required to connect with the eDP interface. There arises a problem that the cost increases.

Patent Publication No. 10-2014-0005466 Patent No. 10-0828403

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an eDP video signal input device for inspecting ultra-high resolution display panel, which enables a video signal for inspection to be input to a display panel for inspecting a display panel with low cost and process. The purpose is to provide.

Also, according to the present invention, an eDP image for an ultra-high resolution display panel inspection for allowing a video signal for inspection of a display panel to be directly transmitted to an eDP interface and inputting the corresponding video signal to a display panel through an eDP interface without additionally installing a conventional LVDS module There is a further purpose in providing a signal input device.

An eDP video signal input apparatus for inspecting an ultra-high resolution display panel of the present invention comprises:

An input unit for receiving a command signal for inputting a video signal for a display panel inspection; If the command signal received through the input unit is a command signal related to the generation of a video image, generates a video image using the video image file stored in the video image file storage unit; An image pattern generating unit for generating an inspection image pattern of the display panel when the command signal received through the input unit is a command signal for generating an inspection image pattern; An overlay generator for generating a desired image to be added to the video image generated by the video image generator or the inspection image pattern generated by the image pattern generator and adding the selected information to the video image or the inspection image pattern; A synchronization signal generation unit for generating a synchronization signal between the image or the test image pattern and each pixel such that the generated image or inspection image pattern is displayed for each corresponding pixel of the display panel; A test image generating unit for generating and outputting a predetermined display panel test video signal when the operation power is applied; And an eDP interface unit for receiving a video signal for a display panel inspection or a test video signal output from the test video generator, An eDP output unit for transmitting a video signal for testing a display panel or a test video signal transmitted through the eDP interface unit to the display panel; Wherein the synchronization signal is generated by using the resolution of the image displayed on the display panel, the pixel size and number of the display panel, and the scanning frequency of the image signal, A time point at which RGB data of the video image or the inspection image pattern is displayed on the corresponding pixel according to the vertical signal (vs) and the horizontal signal (hs) for each pixel of the display panel The test image generator automatically operates only with the application of the operation power. If the command signal is not input through the input unit, the operation power is automatically applied to generate the test image signal and transmit the test image signal to the eDP interface unit.

In the present invention, the inspection video signal includes a multi-channel RGB video signal.

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According to the present invention, since it is not necessary to install an LVDS module in a device for inputting a video signal for inspection of a display panel into a display panel, the cost and process can be reduced.

In addition, according to the present invention, the generation of the video signal for the display panel inspection and the direct data transfer between the eDP interface and the display panel can be realized as a single chip, thereby simplifying the manufacturing process and reducing the manufacturing cost.

In addition, in the present invention, the display panel can be easily inspected by inputting the test image to the display panel only by applying the operating power.

1 is a block diagram of an eDP video signal input apparatus for inspection of an ultra-high resolution display panel according to an embodiment of the present invention;
2 is a configuration diagram of an image processor unit according to an embodiment of the present invention;

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference numerals whenever possible, even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected," "coupled," or "connected. &Quot;

1 is a block diagram of an embedded display port (eDP) video signal input device for inspecting an ultra-high resolution display panel according to an embodiment of the present invention.

Referring to FIG. 1, an embedded display port (eDP) video signal input apparatus 100 (hereinafter, referred to as a video signal input apparatus) for inspecting an ultra-high resolution display panel according to an embodiment of the present invention includes an input unit 110, A processor unit 120, an eDP interface unit 130, and an eDP output unit 140. In this case, in another embodiment of the present invention, the video signal input apparatus 100 may further include a test image generator 150.

The display panel to which the present invention is applied is preferably a high resolution panel, and preferably an embedded display port (eDP) image signal is input. In particular, the present invention is applicable to a display panel having an ultra high definition (UHD) of 4K resolution or higher.

The input unit 110 receives a command signal from the signal generator 10. This command signal is a signal related to the input of the video signal for the display panel inspection. That is, the signal generator 10 generates a video signal for inspection of the display panel and inputs the video signal to the input unit 110. Upon receipt of the inspection video signal, the video signal input device 100 generates and processes the video signal for the display panel inspection according to the command signal and inputs the video signal to the display panel 20. Although the signal generating unit 10 is illustrated as being installed outside the video signal input apparatus 100, this is merely an example. In another example, the signal generating unit 10 may be embedded in the signal generating unit 10. For example, a notebook PC, or may be implemented as a semiconductor chip or a processor when it is installed in an internal form.

The image processor 120 generates a video signal for the display panel inspection when the command signal is received through the input unit 110, and transmits the video signal to the eDP interface unit 130. Specifically, the image processor 120 generates an image signal for inspection and includes desired information in the generated image signal for inspection, so that the information displayed on the image displayed on the display panel 20 is displayed together. Such information may be in various forms, for example, a description of the image, a time at which the image is displayed, and the like. Also, a synchronization signal for synchronizing the video signal and each pixel is generated so that the video corresponding to the video signal for inspection is accurately displayed for each pixel of the display panel 20. Thus, when an image corresponding to the generated inspection video signal is displayed on the display panel 20, an accurate video signal is corresponded to each pixel of the display panel 20, and when the video is displayed, .

The eDP interface unit 130 receives the image signal for the display panel inspection received from the image processor unit 120. The image signal for inspection thus received is a multi-channel RGB image signal for outputting a plurality of channels simultaneously. Preferably, the inspection video signal includes an information signal and a synchronization signal to be displayed on a screen of the display panel.

The eDP output unit 140 transmits the inspection video signal received through the eDP interface unit 130 to the display panel 20. Thus, the display panel 20 displays an image corresponding to a video signal for inspection, and also displays desired information together.

The video signal input apparatus 100 according to the present invention generates a video signal for inspection when a command signal for inputting a video signal for inspection of the display panel 20 is received from the signal generator 10, And outputs the video signal for inspection to the display panel 20 through the display unit 130.

In another embodiment of the present invention, the test image generating unit 150 may be further included. The test image generating unit 150 is configured to operate automatically only by applying an operating power source. Particularly, when the operation power is applied, a test video signal for video test of the predetermined display panel 20 is generated and transmitted to the eDP interface unit 130 so that the corresponding test video signal is transmitted to the display panel 20). This is to allow simple test information to be transmitted to the display panel 20 by supplying only the operating power without passing through the image processor 120 according to the present invention. Therefore, in this embodiment, it is preferable that the operation power is applied to the test image generator 150 when the command signal is not input through the input unit 110. In this case, the test image generator 150 only generates the test image Signal. In this case, it is preferable that a power source (not shown) for applying a coin power to the test image generator 150 is installed. The power supply unit may be installed inside or outside the video signal input apparatus 100.

2 is a configuration diagram of an image processor unit of a video signal input apparatus for a display panel inspection according to the present invention.

2, an image processor 120 according to the present invention includes an image generator 121, an image pattern generator 122, an overlay generator 123, and a synchronization signal generator 124 .

The video image generation unit 121 generates a video image using a video image file stored in an unillustrated video image file storage unit (not shown). To this end, the video signal input apparatus 100 of the present invention is connected to or linked to a video image file storage unit (not shown). For example, a video image file storage unit may be provided inside or outside the video signal input apparatus 100. Preferably, when installed externally, the image generating unit 121 is connected to or interlocked with the video image generating unit 121 to receive a video image file stored therein to generate a video image. Such a video image file may be stored in advance for inspection of the display panel 20. [ If the command signal input from the signal generator 10 through the input unit 110 is a command signal related to the generation of a video image, the video image generation unit 121 calls the video image file stored in the video image file storage unit Thereby generating a video image for inspection of the display panel 20.

The image pattern generating unit 122 generates an image pattern for the display panel inspection. Unlike the image, the image pattern is used internally for a separate inspection. For example, the video image is a video image displayed on the display panel 20 to check whether the video image stored in the display panel 20 is well displayed, and the video pattern for inspection is displayed on the display panel 20, And detects a defect or an error of the display panel 20 from the displayed image pattern when displayed. Particularly, it is preferable that the brightness, resolution, and the like are determined so that the operator can easily inspect defects or the like with the naked eye. For this purpose, the image pattern generation unit 122 generates a predetermined pattern for inspection of the display panel 20 if the command signal input from the signal generation unit 10 through the input unit 110 is a command signal for generating an image pattern for inspection Thereby generating an image pattern for use.

The overlay generation unit 123 generates and adds desired information to the video image generated by the video image generation unit 121 or the inspection video pattern generated by the video pattern generation unit 122. Specifically, when the image image or inspection image pattern generated as described above is displayed on the display panel 20, desired information is added to the image image or the inspection image pattern so that desired information is displayed together. This information refers to information related to the inspection of the display panel 20, such as a description of a video image or an image pattern for inspection, an inspection time, and the like.

The synchronization signal generation unit 124 generates the synchronization signal so that the video image generated by the video image generation unit 121 or the video pattern for inspection generated by the video pattern generation unit 122 is displayed at the correct time for each pixel of the display panel 20 An image signal of a video image or an inspection image pattern and a synchronization signal between pixels are generated. That is, the synchronizing signal is applied to a vertical signal (vs) and a horizontal signal (hs: horizontal signal) set for each pixel of the display panel 20 when a video image or an inspection video pattern is displayed on the display panel 20 Is a signal for determining when the RGB data of the video image or the inspection image pattern is correctly displayed in each corresponding pixel. Thus, when an image corresponding to the generated image signal is displayed on the display panel 20, an accurate image signal is associated with each pixel of the display panel 20. [ To this end, the synchronization signal generator 124 stores information on the resolution of the image displayed on the display panel 20, the pixel size and number of the panel, and the scanning frequency of the image signal. Based on such information, a video image or an inspection video pattern is displayed on the display panel, thereby displaying a video image or an inspection video pattern accurately and clearly.

As described above, when the command signal for the input of the video signal for the display panel inspection is received from the signal generator 10, the video signal input device 100 for inspecting the display panel according to the embodiment of the present invention, And generates information and a synchronization signal to be added to the image or the inspection image pattern and transmits the information and the synchronization signal to the display panel 20 to be inspected through the eDP interface unit 130. [ The image signal input apparatus 100 transmits the generated image image or inspection image pattern, information, and synchronization signals directly to the eDP interface unit 130 without passing through the LVDS module, 130 to the display panel 20 so that the process and cost for installing the LVDS module can be reduced. As a result, the eDP interface is installed on the display panel of various IT products, so that it is possible to perform simple and quick inspection when the display panel is inspected.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10: Signal generator 20: Display panel
110: input unit 120: image processor unit
121: video image generation unit 122: video pattern generation unit
123: Overlay generation unit 124: Sync signal generation unit
130: eDP interface unit 140: eDP output unit
150: Test image generating unit

Claims (8)

An input unit for receiving a command signal for inputting a video signal for a display panel inspection;
If the command signal received through the input unit is a command signal related to the generation of a video image, generates a video image using the video image file stored in the video image file storage unit;
An image pattern generating unit for generating an inspection image pattern of the display panel when the command signal received through the input unit is a command signal for generating an inspection image pattern;
An overlay generator for generating a desired image to be added to the video image generated by the video image generator or the inspection image pattern generated by the image pattern generator and adding the selected information to the video image or the inspection image pattern;
A synchronization signal generation unit for generating a synchronization signal between the image or the test image pattern and each pixel such that the generated image or inspection image pattern is displayed for each corresponding pixel of the display panel;
A test image generating unit for generating and outputting a predetermined display panel test video signal when the operation power is applied; And
An eDP interface unit receiving a video signal for a display panel inspection or a test video signal output from the test video generator,
An eDP output unit for transmitting a video signal for testing a display panel or a test video signal transmitted through the eDP interface unit to the display panel; Lt; / RTI >
Wherein the synchronization signal is generated for each pixel of the display using the resolution of the image displayed on the display panel, the pixel size and number of the display panel, and the scan frequency of the image signal, Determines the time at which the RGB data of the image or inspection image pattern is displayed on the corresponding pixel according to the vertical signal (vs) and the horizontal signal (hs) for each pixel of the display panel,
The test image generator automatically operates only when the operation power is applied. If the command signal is not input through the input unit, the test image generator automatically generates the test image signal and transmits the test image signal to the eDP interface unit. Embedded Display Port (eDP) video signal input device. The method according to claim 1,
Wherein the inspection video signal includes a multi-channel RGB video signal, and the inspection video signal includes a multi-channel RGB video signal. delete delete delete delete delete delete
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180104441A (en) 2017-03-13 2018-09-21 주식회사 로하연구소 Displayport interface module of display test equipment
KR102501100B1 (en) 2022-03-15 2023-02-17 주식회사 픽셀 Display port image distribution device for inspection of imaging devices and method for checking connection of imaging devices
KR20230110020A (en) 2022-01-14 2023-07-21 주식회사 와이즈테크 Wireless connector module, inspection jig and inspection equipment having the same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101166409B1 (en) * 2012-03-08 2012-07-19 주식회사 지엔티시스템즈 High resolution multi-channel display meter for high resolution tablet-pc display module test

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101166409B1 (en) * 2012-03-08 2012-07-19 주식회사 지엔티시스템즈 High resolution multi-channel display meter for high resolution tablet-pc display module test

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180104441A (en) 2017-03-13 2018-09-21 주식회사 로하연구소 Displayport interface module of display test equipment
KR20230110020A (en) 2022-01-14 2023-07-21 주식회사 와이즈테크 Wireless connector module, inspection jig and inspection equipment having the same
KR102501100B1 (en) 2022-03-15 2023-02-17 주식회사 픽셀 Display port image distribution device for inspection of imaging devices and method for checking connection of imaging devices

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