CN-116543685-B - Display device and control method thereof

CN116543685BCN 116543685 BCN116543685 BCN 116543685BCN-116543685-B

Abstract

A display device and a control method thereof are provided, wherein the display device comprises a display panel and a source driver positioned on at least one side of the display panel, the display panel is provided with sub-pixels and a plurality of data signal lines which are arranged in an array, the sub-pixels are electrically connected with the data signal lines, the display device further comprises a repairing module and a plurality of data signal transmission lines, part of the data signal transmission lines are broken, the data signal transmission lines are respectively electrically connected with the source driver and the data signal lines, the repairing module is electrically connected with the data signal lines connected with the broken data signal transmission lines, and the display device is configured to transmit data signals to the data signal lines connected with the broken data signal transmission lines.

Inventors

Cui Zhengxi

Assignees

北京京东方显示技术有限公司
京东方科技集团股份有限公司
北京京东方技术开发有限公司

Dates

Publication Date: 20260512
Application Date: 20230602

Claims (16)

1. A display device is characterized by comprising a display panel, a memory and a source driver positioned on at least one side of the display panel; the display panel is provided with sub-pixels and a plurality of data signal lines which are arranged in an array, wherein the sub-pixels are electrically connected with the data signal lines, the display device also comprises a repair module and a plurality of data signal transmission lines, part of the data signal transmission lines are broken, and the extending direction of the data signal transmission lines is the same as the extending direction of the data signal lines; The data signal transmission line is electrically connected with the source driver and the data signal line respectively; the source driver is electrically connected with the data signal transmission line which is not broken and is configured to provide a data signal for the data signal transmission line which is not broken; the repair module is electrically connected with the data signal line connected with the broken data signal transmission line and is configured to provide a data signal for the data signal line connected with the broken data signal transmission line; The source driver comprises a data processing circuit and a plurality of signal output circuits, wherein the signal output circuits comprise a shift register, a data latch circuit, a level conversion circuit, a digital-to-analog conversion circuit and an output buffer circuit; the data processing circuit is configured to preprocess received image data; The shift register is electrically connected with the data processing circuit and is configured to sample and output the preprocessed image data to generate a first data signal, and comprises at least one shift register unit, a first data signal and a second data signal, wherein a plurality of shift register units positioned in the same shift register are mutually cascaded, and each shift register unit comprises a first shift register unit and a second shift register unit, and the polarities of the first shift register unit and the second shift register unit are opposite; the data latch circuit is electrically connected with the shift register, and is configured to latch the first data signal and output a second data signal; The level conversion circuit is electrically connected with the data latch circuit and is configured to convert a second data signal into a third data signal, and the level of the third data signal is greater than that of the second data signal; the digital-to-analog conversion circuit is configured to convert a third data signal into a data signal, the third data signal being a digital signal, the data signal being an analog signal, The output buffer circuit is respectively and electrically connected with the digital-to-analog conversion circuit and the data signal transmission line and is configured to send the data signal to the data signal transmission line which is not broken; the plurality of data signal transmission lines and the plurality of data signal lines are in one-to-one correspondence, and the number of the shift register units in the signal output circuit is the same as the number of the data signal transmission lines connected with the signal output circuit and has one-to-one correspondence; the memory is configured to store a set of bad identifications including identifications of shift register units electrically connected to broken data signal transmission lines, the identifications including numbers of the shift register units or addresses of the shift register units; the repair module comprises a plurality of repair signal connection lines, wherein the extension direction of the repair signal connection lines is intersected with the extension direction of the data signal lines; The repair signal connecting lines are electrically connected with the data signal lines connected with the data signal transmission lines disconnected and the data signal lines connected with the data signal transmission lines adjacent to the data signal transmission lines disconnected, and the repair signal connecting lines connected with different data signal transmission lines are different; The number of the repair signal connection lines is greater than or equal to the number of the broken data signal transmission lines.
2. The display device according to claim 1, wherein when the display device includes a flip-chip film, the source driver is provided on the flip-chip film; The repair module is arranged on at least one of the display panel and the flip chip film, and the data signal transmission line is arranged on the display panel and the flip chip film.
3. The display device according to claim 2, wherein the repair module includes at least one repair output circuit, at least one repair signal transmission line, and at least one repair signal connection line, an extension direction of the repair signal transmission line intersecting an extension direction of the repair signal connection line, the repair signal transmission line having a one-to-one correspondence with the repair signal connection line, the extension direction of the repair signal transmission line being the same as the extension direction of the data signal transmission line; The data processing circuit is configured to acquire a prestored bad mark set, judge whether the mark of the shift register unit for transmitting the image data is positioned in the prestored bad mark set, transmit the preprocessed image data to the shift register unit when the mark of the shift register unit for transmitting the image data is not positioned in the prestored bad mark set, and transmit the preprocessed repair image data to the repair output circuit when the mark of the shift register unit for transmitting the image data is positioned in the prestored bad mark set, wherein the repair image data is the image data provided to the shift register unit connected to the broken data signal transmission line; the repair output circuit is respectively and electrically connected with the data processing circuit and at least one repair signal transmission line and is configured to generate a data signal sent to a data signal line connected with the broken data signal transmission line according to the preprocessed repair image data; The repair signal connecting wires are respectively and electrically connected with the corresponding repair signal transmission lines and the data signal lines connected with the broken data signal transmission lines, and different repair signal connecting wires are connected with different data signal lines; the number of the repair signal transmission lines is greater than or equal to the number of the broken data signal transmission lines.
4. A display device according to claim 3, wherein the repair output circuit is provided on the flip chip film, the repair signal transmission line is provided on the display panel and the flip chip film, and the repair signal connection line is provided on the display panel.
5. The display device according to claim 3 or 4, wherein the repair output circuit includes a repair shift register, a repair data latch circuit, a repair level conversion circuit, a repair digital-to-analog conversion circuit, and a repair output buffer circuit; The repair shift register is electrically connected with the data processing circuit and is configured to sample and output the preprocessed repair image data to generate a first repair data signal; The repair data latch circuit is electrically connected with the repair shift register, and is configured to latch the first repair data signal and output a second repair data signal; The repair level conversion circuit is electrically connected with the repair data latch circuit and is configured to convert a second repair data signal into a third repair data signal, and the level of the third repair data signal is greater than that of the second repair data signal; The repair digital-to-analog conversion circuit is configured to convert a third repair data signal into a data signal, the third repair data signal being a digital signal, the data signal being an analog signal, The repair output buffer circuit is electrically connected with the repair digital-to-analog conversion circuit and the repair signal transmission line respectively and is configured to send the data signal to the repair signal transmission line.
6. The display device according to claim 5, wherein the repair signal connection line is laser-welded to the data signal line to which the broken data signal transmission line is connected.
7. The display device according to claim 3, wherein the repair output circuit includes a plurality of repair control circuits, a selection circuit, a repair signal transmission line, a first repair signal connection line, and a second repair signal connection line, an extending direction of the first repair signal connection line and an extending direction of the second repair signal connection line intersecting an extending direction of the repair signal transmission line, respectively, the extending direction of the repair signal transmission line being the same as an extending direction of the data signal transmission line; The data processing circuit is configured to generate a control signal; the repair control circuit is respectively and electrically connected with the data processing circuit and the selection circuit and is configured to generate a repair control signal according to the control signal; The selection circuit is electrically connected with the signal output circuit, the repair control circuit, the data signal transmission line and the first repair signal connection line respectively and is configured to transmit the data signal output by the signal output circuit to the data signal transmission line or the first repair signal connection line under the control of the repair control signal; The repair signal transmission line is electrically connected with the first repair signal connection line and the second repair signal connection line respectively, and the second repair signal connection line is electrically connected with a data signal line connected with the broken data signal transmission line.
8. The display device according to claim 7, wherein the repair control circuit, the selection circuit, and the first repair signal connection line are disposed on the flip chip film, the repair signal transmission line is disposed on the display panel and the flip chip film, and the second repair signal connection line is disposed on the display panel.
9. The display device according to claim 7, wherein the repair control circuit is the same in number as the signal output circuits, and the repair control circuit includes a control shift register and a control level shift circuit, the selection circuit including a plurality of selection switches including a control terminal, a first terminal, a second terminal, and a third terminal; The control shift register is respectively and electrically connected with the data processing circuit and the control level conversion circuit and is configured to sample and output a control signal to generate an intermediate control signal; The control level conversion circuit is electrically connected with the control shift register and the selection circuit and is configured to convert an intermediate control signal into a repair control signal, and the level of the repair control signal is greater than that of the intermediate control signal; The control end of the selection switch is electrically connected with the connected control level conversion circuit, the first end of the selection switch is electrically connected with the connected signal output circuit, the second end of the selection switch is electrically connected with the connected data signal transmission line, and the third end of the selection switch is electrically connected with the first repair signal connection line.
10. The display device according to claim 9, wherein the second repair signal connection line is laser-welded to the data signal line to which the broken data signal transmission line is connected.
11. The display device of claim 1, wherein the repair module further comprises a switching circuit comprising a plurality of switches in one-to-one correspondence with the plurality of repair signal connection lines; The switch is electrically connected with the corresponding repair signal connection line.
12. The display device of claim 11, wherein the repair signal connection lines are metal traces; The repair signal connection line is welded with the data signal line connected with the data signal transmission line disconnected, and the repair signal connection line is welded with the data signal line connected with the data signal transmission line adjacent to the data signal transmission line disconnected.
13. The display device according to claim 5, wherein when the repair shift register includes a plurality of repair shift register units, the repair shift register units include a first repair shift register unit and a second repair shift register unit, the polarities of the first repair shift register unit and the second repair shift register unit are opposite, and the polarity of the first shift register unit is the same as the polarity of the first repair shift register unit; the data processing circuit sequentially transmits the plurality of image data to be transmitted to the shift register units connected with the broken data signal transmission line to the plurality of repair shift register units, or transmits the image data to be transmitted to the first shift register unit connected with the broken data signal transmission line to the first repair shift register unit, and transmits the image data to be transmitted to the second shift register unit connected with the broken data signal transmission line to the second repair shift register unit.
14. The display device of claim 2, further comprising a printed circuit board; The printed circuit board is electrically connected with the flip chip film.
15. A control method of a display device, configured to control the display device according to any one of claims 1 to 14, the method comprising: the source driving circuit supplies a data signal to the data signal transmission line which is not broken; the repair module supplies a data signal to a data signal line to which the broken data signal transmission line is connected.
16. The method of claim 15, wherein the source driver includes a data processing circuit and a plurality of shift register cells, the repair module includes a plurality of repair output circuits, and the repair module transmits the data signal to the data signal line to which the broken data signal transmission line is connected includes: The data processing circuit acquires a prestored bad mark set, wherein the bad mark set comprises marks of a shift register unit electrically connected with a broken data signal transmission line, and the marks comprise numbers of the shift register unit or addresses of the shift register unit; The data processing circuit judges whether the identification of the shift register unit for transmitting the image data is positioned in a prestored bad identification set, when the identification of the shift register unit for transmitting the image data is not positioned in the prestored bad identification set, the data processing circuit transmits the preprocessed image data to the shift register unit, and when the identification of the shift register unit for transmitting the image data is positioned in the prestored bad identification set, the data processing circuit transmits the preprocessed repair image data to the repair output circuit, wherein the repair image data is the image data provided for the shift register unit connected with a broken data signal transmission line; The repair output circuit generates a data signal to be supplied to a data signal line to which a broken data signal transmission line is connected, according to the preprocessed repair image data, and supplies the data signal to the data signal line to which the broken data signal transmission line is connected.

Description

Display device and control method thereof Technical Field The disclosure relates to the field of display technologies, but not limited to, and in particular relates to a display device and a control method thereof. Background As two types of displays commonly used in the market, a Liquid Crystal Display (LCD) device has the characteristics of small volume, low power consumption, no radiation and the like, and an Organic LIGHT EMITTING Diode (OLED) and a Quantum dot LIGHT EMITTING Diode (QLED) are active light emitting display devices, and have the advantages of self-luminescence, wide viewing angle, high contrast ratio, low power consumption, extremely high reaction speed, light and thin, flexibility, low cost and the like. The two types of displays are typically connected to a printed circuit board and a display panel by a Chip On Film (COF). Disclosure of Invention The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims. In a first aspect, the present disclosure provides a display device including a display panel and a source driver on at least one side of the display panel; the display panel is provided with sub-pixels and a plurality of data signal lines which are arranged in an array manner, and the sub-pixels are electrically connected with the data signal lines; the display device also comprises a repair module and a plurality of data signal transmission lines, wherein part of the data signal transmission lines are broken, and the extending direction of the data signal transmission lines is the same as the extending direction of the data signal lines; The data signal transmission line is electrically connected with the source driver and the data signal line respectively; the source driver is electrically connected with the data signal transmission line which is not broken and is configured to provide a data signal for the data signal transmission line which is not broken; The repair module is electrically connected to the data signal line connected to the broken data signal transmission line and configured to supply a data signal to the data signal line connected to the broken data signal transmission line. In an exemplary embodiment, when the display device includes a flip-chip film, the source driver is disposed on the flip-chip film; The repair module is arranged on at least one of the display panel and the flip chip film, and the data signal transmission line is arranged on the display panel and the flip chip film. In an exemplary embodiment, the source driver includes a data processing circuit and a plurality of signal output circuits including a shift register, a data latch circuit, a level conversion circuit, a digital-to-analog conversion circuit, and an output buffer circuit; the data processing circuit is configured to preprocess received image data; The shift register is electrically connected with the data processing circuit and is configured to sample and output the preprocessed image data to generate a first data signal; the data latch circuit is electrically connected with the shift register, and is configured to latch the first data signal and output a second data signal; The level conversion circuit is electrically connected with the data latch circuit and is configured to convert a second data signal into a third data signal, and the level of the third data signal is greater than that of the second data signal; the digital-to-analog conversion circuit is configured to convert a third data signal into a data signal, the third data signal being a digital signal, the data signal being an analog signal, The output buffer circuit is respectively and electrically connected with the digital-to-analog conversion circuit and the data signal transmission line and is configured to send the data signal to the data signal transmission line which is not broken; The shift register comprises at least one shift register unit, wherein when the shift register comprises a plurality of shift register units, the plurality of shift register units positioned in the same shift register are mutually cascaded; The plurality of data signal transmission lines and the plurality of data signal lines are in one-to-one correspondence, and the number of the shift register units in the signal output circuit is the same as the number of the data signal transmission lines connected with the signal output circuit, and the one-to-one correspondence exists. In an exemplary embodiment, the display apparatus further includes a memory; The memory is configured to store a set of bad identifications including identifications of shift register units electrically connected to broken data signal transmission lines, the identifications including numbers of the shift register units or addresses of the shift register units. In an exemplary embodiment, the repair module comprises at least one repair output circuit, at least one repair signal transmissi