CN118197255A

CN118197255A - Display device

Info

Publication number: CN118197255A
Application number: CN202311694209.8A
Authority: CN
Inventors: 曺贤杓; 金洺猷
Original assignee: LX Semicon Co Ltd
Current assignee: LX Semicon Co Ltd
Priority date: 2022-12-13
Filing date: 2023-12-11
Publication date: 2024-06-14

Abstract

The display device according to an embodiment of the present invention may include: a panel configured to include a plurality of RGB groups, each of the plurality of RGB groups including a plurality of RGB channels, and each of the plurality of RGB channels including a plurality of RGB pixels; and a source driver configured to: error information is obtained based on error test information for testing an error of data transmitted from the timing controller, the error information is converted into an identification code, an RGB information set matching the converted identification code is generated, and a data voltage is supplied to each of a plurality of RGB groups constituting a panel based on the generated RGB information set, wherein the panel is configured to display the identification code based on the data voltage.

Description

Display device

Technical Field

The present disclosure relates to a display device, and more particularly, to a display device that can simply express status information of the display device.

Background

Display devices such as Liquid Crystal Display (LCD) devices and Organic Light Emitting Display (OLED) devices are commonly used in electronic devices such as televisions, computers and mobile phones.

When image data (RGB data) is supplied to the source driver through the timing controller, the display device displays an image.

In general, image data supplied from a timing controller to a source driver is transmitted at a sufficiently low frequency that bit errors are relatively rare.

Previously, in order to notify information about bit errors, the information about bit errors was transmitted to the shipment inspection device through a read-back protocol, visually expressed in the form of lines on a screen, or character strings were directly displayed on the screen to express accurate numbers or information.

However, as in the past, when information on bit errors is transmitted to the shipment inspection device through the read-back protocol, there is an inconvenience in that means for the read-back protocol must be implemented in the shipment inspection device.

In addition, when information on bit errors is provided in the form of lines as before, there is a problem in that only simple information is provided.

In addition, as in the past, the method of directly expressing a character string in an image to express an accurate number or information about bit errors has a problem in that a complicated design structure of a source driver or a gate driver is required.

Disclosure of Invention

The object of the present invention is to determine the state of a source driver by providing specific test results of the source driver in the form of Morse codes.

The object of the invention is to check for errors without the need to implement a separate read-back protocol in a shipment inspection device that inspects a display device.

A method for displaying a state of a display device including a panel (including a plurality of RGB groups) and a source driver according to an embodiment of the present invention may include: obtaining, by the source driver, error information based on error test information for testing an error of the data transmitted from the timing controller; converting the obtained error information into an identification code by a source driver; generating, by the source driver, a set of RGB information matching the converted identification code; supplying, by a source driver, a data voltage to each of a plurality of RGB groups constituting a panel based on the generated RGB information set; and displaying, by the panel, the identification code based on the data voltage.

According to the embodiments of the present invention, when a specific test result of a source driver is displayed on a panel using Morse codes, an internal state and an error state of the source driver can be simply and accurately identified.

In addition, according to the embodiment of the present invention, information about errors can be provided without implementing a separate read-back protocol in a shipment inspection device that inspects a display device, thereby reducing costs.

In addition, according to the embodiment of the present invention, error information can be identified by detecting only some RGB groups of the panel, and thus an error test result can be easily performed.

Drawings

Fig. 1 is a configuration diagram of a display device according to an embodiment.

Fig. 2 is a flowchart illustrating a display method of status information of a display device according to an embodiment of the present invention.

Fig. 3 is a diagram illustrating a set of morse codes corresponding to numerals.

Fig. 4 is a diagram showing an example of displaying error information using a morse code according to an embodiment of the present invention.

Fig. 5 is a block diagram illustrating a configuration of a source driver according to an embodiment of the present disclosure.

Fig. 6 is a flowchart illustrating an operation method of a source driver according to an embodiment of the present disclosure.

Detailed Description

Hereinafter, the present disclosure will be described in more detail with reference to the accompanying drawings.

Hereinafter, some embodiments of the present invention will be described in detail by way of exemplary drawings. When reference is made to components in the respective drawings, it should be noted that the same components are given the same reference numerals as much as possible even though they are shown in different drawings. In addition, in describing the present invention, if it is determined that detailed description of related known configurations or functions may obscure the gist of the present invention, detailed description will be omitted.

In addition, in describing the components of the present invention, terms such as first, second, A, B, (a) and (b) may be used.

These terms are only used to distinguish one component from another and the nature or order of the components is not limited by the terms. When a component is described as being "coupled" or "connected" to another component, the component may be directly coupled or connected to the other component, but it will be understood that another component between the various components may be "coupled," combined, "or" connected.

Referring to fig. 1, a display device 10 may include a panel 11, a source driver 12 (SDIC), a gate driver 13 (GDIC), and a timing controller 14.

A plurality of Data Lines (DL) and a plurality of Gate Lines (GL) may be disposed on the panel 11, and a plurality of pixels (P) may be disposed.

The plurality of pixels (P) may be arranged adjacent to each other in the horizontal direction (H) and the vertical direction (V) of the panel 11 to form a square shape. The square shape is similar to the matrix shape, and a set of a plurality of pixels (P) arranged in a horizontal direction (H) or a horizontal line represented by them may be defined as a row or a line, and a set of a plurality of pixels (P) arranged in a vertical direction (V) or a vertical line represented by them may be defined as a column or a channel.

The gate driver 13 may supply a scan signal of an on voltage or an off voltage to the gate line GL. The pixel (P) is connected to the Data Line (DL) when a scan signal having an on voltage is supplied to the pixel (P), and the pixel (P) connected to the Data Line (DL) is disconnected when a scan signal having an off voltage is supplied to the pixel (P).

The source driver 12 supplies a data voltage to the data line DL. The data voltage supplied to the Data Line (DL) is transmitted to the pixel (P) connected to the Data Line (DL) according to the scan signal.

The timing controller 14 may supply various control signals to each of the source driver 12 and the gate driver 13.

The timing controller 14 may convert image data input from the outside into image data (RGB data) of a data format used by the source driver 12 to output to the source driver 12.

The timing controller 14 may generate a Gate Control Signal (GCS) to start scanning according to the timing implemented in each frame and transmit it to the gate driver 13.

The timing controller 14 may transmit a Data Control Signal (DCS) controlling the source driver 12 to supply the data voltage to each pixel (P) according to each timing.

Referring to fig. 2, the timing controller 14 of the display device 10 may transmit error test information to the source driver 12 (S201).

The error test information may include information for testing an error in data transmitted from the timing controller 14 or an external device to the source driver 12.

In one embodiment, the error test information may include information for testing errors in the image data sent by the timing controller 14 to the source driver 12.

The error test information may include information for checking bit errors in the image data. As an example, the error test information may include a Bit Error Rate (BER) test pattern for testing BER. The BER test pattern may be a pattern erroneously embedded in bits configuring image data.

The source driver 12 may obtain error information based on the received error test information (S203).

In one embodiment, the error information may include one or more of a Bit Error Rate (BER) or a type of error.

The source driver 12 may calculate BER based on the error test information. The source driver 12 may include an error detection circuit for detecting an error included in the error test information. The error detection circuit may detect the error information by a parity check or a Cyclic Redundancy Check (CRC).

The error detection circuit may include a BER detection circuit for detecting BER.

In another embodiment, the source driver 12 may obtain error information indicating the type of error based on the error test information.

The type of error may be one of a single bit error type, a multi-bit error type, a burst error type, and a random error type.

The single bit error type may be a type in which an error occurs in one bit during transmission of image data.

The multi-bit error type may be a type in which two or more bits are simultaneously incorrect during transmission of image data.

The burst error type may be a type in which an error occurs in consecutive bits during transmission of image data.

The random error type may be a type in which bit errors occur randomly during transmission of image data.

The error detection circuit of the source driver 12 may further include an error type detection circuit for detecting the type of error based on the error test information.

The source driver 12 may transmit the acquired error information to the timing controller 14 (S205).

The error information may include one or more of BER or error type.

The timing controller 14 may convert the received error information into an identification code (S207).

In one embodiment, the identification code may be a code that can identify the error information.

As an example, the identification code may be a morse code. The error information may be expressed as a number, a string of numbers, a character, or a string.

The identification code may comprise a plurality of Morse code sets. Each of the plurality of Morse code sets may comprise a plurality of Morse codes.

Referring to fig. 3, a plurality of morse code sets corresponding to respective numbers from 0 to 9 are shown.

Each set of morse codes may include one or more of the first morse code 310 or the second morse code 330.

For example, the number 0 may be identified by five first Morse codes 310.

The number 1 may be identified by one second morse code 330 followed by four first morse codes 310.

The number 2 may be identified by two second morse codes 330 followed by three first morse codes 310.

The first Morse code 310 may be a code whose RGB values correspond to full white (255 ) or full black (0, 0).

The second Morse code 330 may be a code in which a particular sub-pixel value among the R, G, and B sub-pixel values may correspond to 255 and the remaining sub-pixel values may correspond to 0. For example, the second Morse code 330 may be a code whose RGB values correspond to all green (0,255,0). However, this is merely an example, and the second morse code 330 may be a code whose RGB value corresponds to full red (255, 0) or full blue (0,0,255).

Again, fig. 2 will be described.

The timing controller 14 may generate an RGB information set matching the converted identification code (S209) and transmit the generated RGB information set to the source driver 12 (S211).

The timing controller 14 may generate a set of RGB information that matches the morse code corresponding to the error information.

The RGB information set may include a plurality of RGB information matching the morse code set that each of a plurality of RGB groups constituting the panel 11 must represent.

The RGB information may include RGB values provided to each of a plurality of RGB channels included in the respective RGB groups.

The RGB information may include RGB values provided to each of a plurality of RGB pixels included in each of a plurality of RGB channels of the RGB group.

The timing controller 14 may transmit the RGB information set and the control signal to the source driver 12 to supply the data voltage based on the RGB information set.

The source driver 12 may supply a data voltage to each of a plurality of RGB groups included in the panel 11 based on the RGB information set (S213).

The source driver 12 may supply data voltages corresponding to the respective RGB information included in the RGB information set to the corresponding RGB group.

The panel 11 may display the identification code based on the supplied data voltage.

Referring to fig. 4, the panel 11 may include a plurality of RGB groups 401 to 405.

Each of the plurality of RGB groups 401 to 405 may include a plurality of RGB channels.

For example, the first RGB group 401 may include 2 nd to 6 th RGB channels (pixels 2 to 6), the second RGB group 402 may include 8 th to 12 th RGB channels (pixels 8 to 12), the third RGB group 403 may include 14 th to 18 th RGB channels (pixels 14 to 18), the fourth RGB group 404 may include 20 th to 24 th RGB channels (pixels 20 to 24), and the fifth RGB group 405 may include 26 th to 30 th RGB channels (pixels 26 to 30).

There may be additional RGB channels (pixels 1, 7, 13, 19, 25 and 31) between the RGB groups to distinguish the morse code.

For example, an additional seventh RGB channel (pixel 7) may be disposed between the first RGB group 401 and the second RGB group 402. One or more additional RGB channels may be provided between dots, lines or numbers.

Each RGB channel may include a plurality of RGB pixels in a column form. The plurality of RGB pixels included in the respective RGB channels may be arranged in a column form.

Each of the plurality of RGB pixels may include an R sub-pixel, a G sub-pixel, and a B sub-pixel.

The dots in the Morse code may be expressed using only one type of pixel included in the RGB channel, and the lines in the Morse code may be expressed using all three types of pixels included in the RGB channel.

In addition, each RGB group of the panel 11 may express more lines using white on a black background or black on a white background.

Other types of pixels that are not used for Morse code points may also be used as boundaries between numbers.

In fig. 4, it is assumed that the error information is a numeric string called 65536. In this case, the first RGB group 401 may represent a morse code set corresponding to "6", the second RGB group 402 may represent a morse code set corresponding to "5", the third RGB group 403 may represent a morse code set corresponding to "5", the fourth RGB group 404 may represent a morse code set corresponding to "3", and the fifth RGB group 405 may represent a morse code set corresponding to "6".

The set of morse codes shown at the numeral "6" shown in fig. 3 may be comprised of a first morse code 310 and four consecutive second morse codes 330 following the first morse code 310.

To express the first morse code 310, the timing controller 14 may obtain RGB values of a plurality of RGB pixels included in the second RGB channel (pixel 2) as values (255 ) corresponding to full white.

To express four consecutive second morse codes 330, the timing controller 14 may obtain RGB values of a plurality of RGB pixels (pixels 3 to 6) included in each of the third to sixth RGB channels as values corresponding to the full green color (0,255,0).

In this way, the timing controller 14 can obtain RGB values of a plurality of RGB channels included in each RGB group of the remaining digital string "5536".

The timing controller 14 may generate RGB values of a plurality of RGB channels included in each RGB group as RGB information.

The timing controller 14 may generate the first RGB information such that the first RGB group 401 represents a Morse code set corresponding to "6".

The timing controller 14 may generate the second RGB information such that the second RGB group 402 represents a set of morse codes corresponding to "5".

The timing controller 14 may generate the third RGB information such that the third RGB group 403 represents a Morse code set corresponding to "5".

The timing controller 14 may generate the fourth RGB information such that the fourth RGB group 404 represents a set of morse codes corresponding to "3".

The timing controller 14 may generate the fifth RGB information such that the fifth RGB group 405 represents a Morse code set corresponding to "6".

The timing controller 14 may transmit the RGB information set including the first to fifth RGB information to the source driver 12.

The source driver 12 may supply data voltages to the respective RGB groups based on the RGB information set.

The source driver 12 may supply a first data voltage corresponding to the first RGB information to the first RGB group 401.

The source driver 12 may supply a second data voltage corresponding to the second RGB information to the second RGB group 402.

The source driver 12 may supply a third data voltage corresponding to the third RGB information to the third RGB group 403.

The source driver 12 may supply a fourth data voltage corresponding to the fourth RGB information to the fourth RGB group 404.

The source driver 12 may supply a fifth data voltage corresponding to the fifth RGB information to the fifth RGB group 405.

The first RGB group 401 constituting the panel 11 may display the first morse code set 411 corresponding to the number "6" according to the first data voltage. The first set of Morse codes 411 may represent Morse codes corresponding to the number "6" shown in FIG. 3. The first Morse code set 411 may include an all white column format 431 corresponding to the first Morse code 310 and all green columns 432-435 corresponding to the second Morse code 330.

The second RGB group 402 constituting the panel 11 may display a second morse code set 412 corresponding to the number "5" according to the second data voltage. The second set of morse codes 412 may include all green columns corresponding to the second morse code 330.

The third RGB group 403 constituting the panel 11 may display a third morse code set 413 corresponding to the number "5" according to the third data voltage. The third Morse code set 413 is the same as the second Morse code set 412.

The fourth RGB group 404 constituting the panel 11 may display a fourth morse code set 414 corresponding to the number "3" according to the fourth data voltage. The fourth Morse code set 414 may include three rows of all-green columns and two rows of all-white columns.

The fifth RGB group 405 constituting the panel 11 may display a fifth morse code set 415 corresponding to the number "6" according to the fifth data voltage. The fifth Morse code set 415 is the same as the first Morse code set 411.

Since the panel 11 is not interlocked with the gate driver 13 during shipment inspection, the panel 11 may display the Morse code set on a line (column) basis.

Thus, according to the embodiment of the present invention, when a specific test result of the source driver 12 is displayed on the panel 11 using the morse code, the internal state and the error state of the source driver 12 can be accurately and simply recognized.

In addition, according to the embodiment of the present invention, information about errors can be provided without implementing a separate read-back protocol in the shipment inspection device that inspects the display device 10, thereby reducing costs.

In addition, according to the embodiment of the present invention, error information can be identified by detecting only some RGB groups of the panel 11, and thus an error test result can be easily performed.

Referring to fig. 5, the source driver 12 may include an error detection circuit 12a and a processor 12b.

The error detection circuit 12a may detect an error based on error test information received from the timing controller 14 or an external device.

Error detection circuit 12a may detect one or more of BER or error type based on the error test information.

The error detection circuit 12a may detect errors through parity checking or Cyclic Redundancy Checking (CRC).

The processor 12b may control the overall operation of the source driver 12.

The processor 12b may convert the obtained error information into an identification code.

The processor 12b may generate a set of RGB information that matches the converted identification code.

The processor 12b of the source driver 12 may supply the data voltage to the respective RGB groups based on the RGB information.

Fig. 6 is a diagram illustrating an embodiment in which the source driver 12 performs some of the functions of the timing controller 14 described in the embodiment of fig. 2.

In fig. 6, portions that overlap those illustrated in fig. 2 are borrowed from the embodiment of fig. 2.

Referring to fig. 6, the error detection circuit 12a of the source driver 12 may receive error test information (S601).

The error test information may include information for testing errors in the data transmitted from the timing controller 14 to the source driver 12.

The error test information may include information for checking bit errors in the image data. As an example, the error test information may include a Bit Error Rate (BER) test pattern for testing BER. The BER test pattern may be a pattern erroneously embedded in bits constituting image data.

The error detection circuit 12a of the source driver 12 may obtain error information based on the received error test information (S603).

The error detection circuit 12a may calculate BER based on the error test information. The error detection circuit 12a may include an error detection circuit for detecting an error included in the error test information. As an example, the error detection circuit may include a BER detection circuit to detect BER.

In another embodiment, the error detection circuit 12a may obtain error information indicating the type of error based on the error test information.

The processor 12b of the source driver 12 may convert the obtained error information into an identification code (S605).

As an example, the identification code may be a morse code. The error information may be expressed as numbers, letters, or strings.

The error information may be expressed by a combination of Morse codes. If the error information is digital, the multiple Morse code sets of FIG. 3 corresponding to 0 through 9 may be used to identify the error information.

The processor 12b of the source driver 12 may generate an RGB information set matching the converted identification code (S607).

The processor 12b of the source driver 12 may supply the data voltage to the respective RGB groups based on the RGB information (S609).

The processor 12b of the source driver 12 may supply data voltages corresponding to the respective RGB information included in the RGB information set to the corresponding RGB group.

An example of using Morse codes to display error information employs the embodiment of FIG. 4.

According to an embodiment of the present disclosure, the above-described method may be implemented as processor-readable code on a program recording medium. Examples of processor-readable media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, and optical data storage.

The above-described display device is not limited to the configuration and method of the above-described embodiments, and the embodiments may be configured by selectively combining all or part of the respective embodiments so that various modifications may be made.

Claims

1. A display device, the display device comprising:

A panel configured to include a plurality of RGB groups, each of the plurality of RGB groups including a plurality of RGB channels, and each of the plurality of RGB channels including a plurality of RGB pixels; and

A source driver configured to:

Error information is obtained based on error test information for testing errors of data transmitted from the timing controller,

The error information is converted into an identification code,

Generating an RGB information set matching the converted identification code, and

Supplying a data voltage to each of the plurality of RGB groups constituting the panel based on the generated RGB information set,

Wherein the panel is configured to display the identification code based on the data voltage.

2. The display device of claim 1, wherein the identification code comprises a plurality of morse code sets, each morse code set comprising a plurality of morse codes.

3. The display device of claim 2, wherein each of the sets of morse codes comprises at least one of a first morse code or a second morse code.

4. A display device according to claim 3, wherein the first morse code is a code whose RGB values correspond to full white or full black, and

The second Morse code is a code in which only a specific subpixel among the R, G, and B subpixel values has a value of 255 and the remaining subpixels have a value of 0.

5. The display device of claim 1, wherein the RGB information set includes a plurality of RGB information matching a morse code represented by each of the plurality of RGB groups, and

The respective RGB information includes RGB values provided to each of a plurality of RGB pixels included in each of a plurality of RGB channels of the respective RGB groups.

6. The display device of claim 1, wherein the error information is a bit error rate or an error type.

7. The display device of claim 6, wherein the error information is expressed as a number, a string of numbers, a letter, or a string.

8. The display device according to claim 1, wherein the source driver further comprises an error detection circuit configured to detect the error information from the error test information.

9. The display device according to claim 8, wherein the error detection circuit detects the error information by a parity check or a cyclic redundancy check CRC.

10. The display device according to claim 1, wherein the plurality of RGB channels included in the respective RGB groups are arranged in a column form.