Patent Application
20220172654
The present disclosure claims priority to Chinese Patent Application No. 202011359648.X filed in China on Nov. 27, 2020, the disclosure of which is hereby incorporated by reference in its entirely.
The present disclosure relates to the field of display, and in particular, to a display panel, a method for detecting a display panel and an electronic device.
In the related art, a small-sized watch product is taken as an example of an organic light emitting diode display product, and after the small-sized watch product completes a single display screen preparation process, electronic detection needs to be performed on the small-sized watch product to screen out defective products, so that the single display screens flowing to a module process are all good products. In the design of the backboard for displaying a product in the related art, part of circuit abnormity cannot be detected in electronic detection before the control chip is bound, and badness can be detected only when the display product is subjected to final detection after a module process (namely, after the flexible circuit board and the control chip are bound), so that the waste of capacity and materials is caused.
Therefore, the display panel, the method for testing the display panel, and the electronic device still need to be improved.
In a first aspect, a display panel is provided in the present disclosure, including a display area and a peripheral region surrounding the display area;
a plurality of bonding pads in the peripheral region;
a lighting pad in the peripheral region;
a plurality of source signal lines at least in the display region;
a plurality of source signal line leads in the peripheral region and electrically connected to the plurality of source signal lines and electrically connected to the plurality of bonding pads;
a plurality of sub-pixel columns in the display region and electrically connected to the plurality of source signal lines; and
a detection circuit, arranged in the peripheral region and between the plurality of binding pads and the display area, where the detection circuit and the lighting pad are symmetrically distributed on two sides of the display area;
where the detection circuit includes at least one lighting data line which surrounds the display area, extends to the lighting pad and is electrically connected to the lighting pad;
the at least one lighting data line is electrically connected to at least one of the plurality of source signal line leads, and is configured to transmit a lighting signal to the at least one of the plurality of source signal line leads.
Optionally, the display panel includes: a multi-splitter circuit between the display area and the detection circuit, and electrically connected to at least two of the plurality of source signal lines and one of the plurality of source signal line leads, where the multi-splitter circuit is configured to transmit the lighting signal provided by the source signal line leads to the at least two source signal lines respectively at different periods of time.
Optionally, a direction pointing from the bonding region to the lighting pad is a first direction, the at least one lighting data line extends in a direction perpendicular to the first direction, and the plurality of source signal line leads extend in the first direction.
Optionally, the multi-splitter circuit includes a first sub-circuit connected to the sub-pixel columns in odd columns and a second sub-circuit connected to the sub-pixel columns in even columns.
Optionally, the at least one lighting data line includes a first lighting data line, a second lighting data line and a third lighting data line,
the first lighting data line, the second lighting data line and the third lighting data line are respectively electrically connected to different source signal line leads.
Optionally, the display panel further includes at least one thin film transistor, where a source of the at least one thin film transistor is electrically connected to the at least one lighting data line, and a drain of the at least one thin film transistor is electrically connected to the plurality of source signal line leads.
Optionally, the at least one lighting data line further includes a switch bus electrically connected to gates of the plurality of thin film transistors.
Optionally, the switch bus is located on a side of the gate away from a substrate, and an insulating medium is interposed between the switch bus and the gate, and the switch bus and the gate are electrically connected through a via in the insulating medium.
In a second aspect, a method for detecting a display panel hereinabove is further provided in the present disclosure, including: inputting a lighting signal from the lighting pad to the plurality of source signal lines through the detection circuit.
In a third aspect, an electronic device is further provided in the present disclosure, including a display panel;
where the display panel includes a display area and a peripheral region surrounding the display area;
a plurality of bonding pads in the peripheral region;
a lighting pad in the peripheral region;
a plurality of source signal lines at least in the display region;
a plurality of source signal line leads in the peripheral region and electrically connected to the plurality of source signal lines and electrically connected to the plurality of bonding pads;
a plurality of sub-pixel columns in the display region and electrically connected to the plurality of source signal lines; and
a detection circuit, arranged in the peripheral region and between the plurality of binding pads and the display area, where the detection circuit and the lighting pad are symmetrically distributed on two sides of the display area;
where the detection circuit includes at least one lighting data line which surrounds the display area, extends to the lighting pad and is electrically connected to the lighting pad;
the at least one lighting data line is electrically connected to at least one of the plurality of source signal line leads, and is configured to transmit a lighting signal to the at least one of the plurality of source signal line leads.
Optionally, the electronic device includes: a multi-splitter circuit between the display area and the detection circuit, and electrically connected to at least two of the plurality of source signal lines and one of the plurality of source signal line leads, where the multi-splitter circuit is configured to transmit the lighting signal provided by the source signal line leads to the at least two source signal lines respectively at different periods of time.
Optionally, a direction pointing from the bonding region to the lighting pad is a first direction, the at least one lighting data line extends in a direction perpendicular to the first direction, and the plurality of source signal line leads extend in the first direction.
Optionally, the multi-splitter circuit includes a first sub-circuit connected to the sub-pixel columns in odd columns and a second sub-circuit connected to the sub-pixel columns in even columns.
Optionally, the at least one lighting data line includes a first lighting data line, a second lighting data line and a third lighting data line,
the first lighting data line, the second lighting data line and the third lighting data line are respectively electrically connected to different source signal line leads.
Optionally, the electronic device further includes at least one thin film transistor, where a source of the at least one thin film transistor is electrically connected to the at least one lighting data line, and a drain of the at least one thin film transistor is electrically connected to the plurality of source signal line leads.
Optionally, the at least one lighting data line further includes a switch bus electrically connected to gates of the plurality of thin film transistors.
Optionally, the switch bus is located on a side of the gate away from a substrate, and an insulating medium is interposed between the switch bus and the gate, and the switch bus and the gate are electrically connected through a via in the insulating medium.
The above and/or additional aspects and advantages of the present disclosure will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
Reference will now be made in detail to the embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, where like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present disclosure, and are not to be construed as limiting the present disclosure.
The present application is directed to solving, to some extent, one of the technical problems in the related art.
In one aspect of the present disclosure, referring to
It should be noted that the open circles in black in the drawings indicate that the two lines do not intersect, that is, the open circles in black indicate that the two lines do not communicate with each other, and only the orthographic projections of the two lines on the substrate intersect.
For ease of understanding, referring to
in the related art, a plurality of source signal lines connecting the small-sized display panel and the sub-pixel columns extend from the display area 100 to the bonding area at the periphery of the display area 100 and are connected to the multi-splitter circuit 300, and the multi-splitter circuit 300 extends to the fan-out area 500 and is connected to a plurality of ports of the flexible printed circuit board of the bonding pad 600. Therefore, one multi-splitter circuit 300 can control multiple rows of sub-pixel columns simultaneously, thereby reducing the routing difficulty of the fan-out area 500. However, in this connection manner, when the single display panel is electronically inspected before the control chip is bonded, the lighting signal can only be directly transmitted to the pixel area 100 through the lighting pad 700 to be subjected to the lighting test, and the lighting signal does not pass through the source signal line, the multi-splitter circuit, and the fan-out area. That is, the lighting test at this time cannot detect abnormalities such as electrostatic burns, short circuits, and disconnection in some or more lines in the multi-splitter circuit, the source signal line, and the fan-out area, and the abnormalities of the display panel can be detected only when the display product reaches the rear section, completes the module process, and performs final inspection through the control chip, resulting in a great waste of module productivity and materials.
In the present disclosure, referring to
According to some embodiments of the present disclosure, referring to
According to some embodiments of the present disclosure, the number of sub-pixel columns connected to the same multi-splitter circuit is not particularly limited as long as the number of sub-pixel columns connected to the same multi-splitter circuit is greater than 1, for example, the number of sub-pixel columns connected to the same multi-splitter circuit may be 6 or 12.
According to some embodiments of the present disclosure, the emission colors of the sub-pixel columns connected to the same multi-splitter circuit are not particularly limited, for example, the emission colors of the sub-pixel columns connected to the same multi-splitter circuit may be the same. When a plurality of sub-pixel columns of the same emission color are connected to a multi-splitter circuit, the multi-splitter circuit can uniformly control the emission intensity of the plurality of sub-pixel columns connected thereto, so as to detect the color difference between the sub-pixel columns of the same color.
According to some embodiments of the present disclosure, the number of sub-circuits included in the multi-splitter circuit is not particularly limited, for example, the multi-splitter circuit may include a first sub-circuit and a second sub-circuit, where the first sub-circuit may be connected to a plurality of sub-pixel columns in odd columns, and the second sub-circuit may be connected to a plurality of sub-pixel columns in even columns.
According to some embodiments of the present disclosure, the number of the sub-pixel lighting data lines included in the lighting data lines is not particularly limited as long as it is consistent with the kind of the sub-pixel column color of the display area. For example, when the sub-pixel columns of the display region are repeatedly arranged in an RGB format, the sub-pixel lighting data lines of the lighting data lines may include a first lighting data line, i.e., a red lighting data line, a second lighting data line, i.e., a green lighting data line, and a third lighting data line, i.e., a blue lighting data line. When the number of the sub-pixel lighting data lines is consistent with the type of the sub-pixel column color of the display area, the sub-pixel column of at least one color in the display area can emit light simultaneously when the electronic detection is carried out.
According to some embodiments of the present disclosure, referring to
In order to improve the uniformity of light emission of the same color sub-pixel row in the lighting test, the source signal line lead may further include a thin film transistor.
According to some embodiments of the present disclosure, each of the sub-pixel lighting data lines and the source signal line lead may further include at least one thin film transistor therebetween. The detection circuit realizes the line detection of the multi-splitter circuit, the source signal line and the fan-out area in the electronic detection stage, and can effectively detect the line abnormity of the multi-splitter circuit, the source signal line and the fan-out area. Because the lighting data line has self internal resistance, when the lighting data line transmits lighting signals to the source signal line leads, lighting signals received by the source signal line leads at different positions have difference due to IR drop, and the lighting test display effect shows that the display brightness of the sub-pixel rows with the same color is not uniform. The thin film transistor is arranged between the lighting data line and the source electrode signal line lead, so that the problem of uneven display brightness of the sub-pixel rows with the same color can be effectively solved, where the lighting data line can control the switch of the thin film transistor, the source electrode signal line lead is connected to the source electrode of the thin film transistor, and the drain electrode of the thin film transistor is connected to the multi-splitter circuit, so that the lighting signals which can be output to the multi-splitter circuit through the thin film transistor are kept consistent by controlling the electrical characteristics of the thin film transistor.
According to some embodiments of the present disclosure, referring to
According to some embodiments of the present disclosure, the composition of the thin film transistor gate is not particularly limited, for example, the gate of the thin film transistor may include a first gate and a second gate. That is, the thin film transistor may be a double gate type thin film transistor. When the grid electrode of the thin film transistor includes the first grid electrode and the second grid electrode, the thin film transistor has stronger regulation and control capability on the source current, so that the characteristics of the thin film transistor can be regulated and controlled, and the current output by the thin film transistor can be regulated and controlled, therefore, the uniformity of the lighting signal transmitted to the multi-splitter circuit can be further improved, and the uniformity of the lighting signal received by a plurality of sub-pixel columns connected to the multi-splitter circuit can be further controlled.
According to some embodiments of the present disclosure, referring to
According to some embodiments of the present disclosure, referring to
In another aspect of the present disclosure, the present disclosure provides a method for detecting a display panel, where the display panel is the display panel described above, and the method includes: a lighting signal is inputted from a lighting pad to a plurality of source signal lines through a detection circuit. Therefore, the abnormity detection of the source electrode signal line, the multi-splitter circuit and the fan-out area of the display panel which only completes the single display screen preparation process can be directly realized, the detection can be completed without a module process, the detection flow is greatly simplified, and the waste of defective products to module process productivity and materials is reduced.
According to some embodiments of the present disclosure, the kinds of the lighting signals output by the lighting pad are not particularly limited, and for example, the lighting signals may include timing signals as well as switching signals. Therefore, the display area can be displayed with different colors through the change of the lighting signal, and the completeness of detection is ensured.
According to some embodiments of the present disclosure, the lighting data line is not particularly limited in composition, for example, the lighting data line may further include a switch bus and a plurality of sub-pixel lighting data lines, each of which further includes a thin film transistor between the source signal line lead and each of the sub-pixel lighting data lines.
According to some embodiments of the present disclosure, the method for detecting the display panel is not particularly limited, for example, when the lighting data line may further include a switch bus and a plurality of sub-pixel lighting data lines, each of which further includes a thin film transistor between the sub-pixel lighting data line and the source signal line lead, the method for detecting the display panel further includes: the switch bus is inputted with a switch signal to turn on the plurality of thin film transistors, and the lighting signal is inputted to the drain of the thin film transistor through the sub-pixel lighting data line and inputted from the source of the thin film transistor to the source signal line lead. This further improves the uniformity of light emission of each sub-pixel row during detection.
According to some embodiments of the present disclosure, the circuit design of the multi-splitter circuit is not particularly configured, and for example, may have a structure as shown in
When the detection circuit does not include a thin film transistor, that is, the lighting data lines include only the first lighting data line, the second lighting data line, and the third lighting data line, the driving timing diagram does not include the SW timing in
when the red lighting test is performed, the MUX2, the MUX3, the MUX5, and the MUX6 are all kept in the high-level off state, and in the same frame, when the MUX1 is in the low-level on state, the MUX4 is kept in the high-level off state, and when the MUX1 is in the high-level off state, the MUX4 is kept in the low-level on state, so that the red subpixels in the odd columns and the even columns are sequentially lit, and the display of the display panel is red.
Similarly, when the green lighting test is performed, the MUX1, the MUX3, the MUX4, and the MUX6 all keep a high-level off state, and in the same frame, when the MUX2 is low-level on, the MUX5 keeps high-level off, and when the MUX2 is high-level off, the MUX5 keeps low-level on, so that the green sub-pixels in the odd columns and the even columns are sequentially turned on, and the display of the display panel is green.
Similarly, when the blue lighting test is performed, the MUX1, the MUX2, the MUX4, and the MUX5 all keep a high-level off state, and in the same frame, when the MUX3 is low-level on, the MUX6 keeps high-level off, and when the MUX3 is high-level off, the MUX6 keeps low-level on, so that the blue sub-pixels in the odd columns and the even columns are sequentially turned on, and the display of the display panel is blue.
When performing the black or white lighting test, the MUX1-6 is turned on at low level in the same frame. Thereby, the display panel displays black or white.
When the lighting data lines include only the first lighting data line, the second lighting data line, the third lighting data line, and the switch bus, i.e., the thin film transistor is included between the lighting data line and the source signal line lead, the driving timing diagram includes the SW timing shown in
In yet another aspect of the present disclosure, the present disclosure proposes an electronic device, which includes a display panel,
the display panel includes a display area and a peripheral region surrounding the display area;
a plurality of bonding pads in the peripheral region;
the lighting pad is in the peripheral region;
a plurality of source signal lines at least in the display region;
a plurality of source signal line leads in the peripheral region and electrically connected to the plurality of source signal lines and electrically connected to the plurality of bonding pads;
a plurality of sub-pixel columns in the display region and electrically connected to the plurality of source signal lines;
the detection circuit is in the peripheral region, positioned between the plurality of binding pads and the display area and symmetrically distributed on two sides of the display area together with the lighting pad;
the detection circuit includes at least one lighting data line which surrounds the display area, extends to the lighting pad and is electrically connected to the lighting pad;
the at least one lighting data line is electrically connected to at least one of the plurality of source signal line leads, and is configured to transmit a lighting signal to the at least one of the plurality of source signal line leads.
Optionally, the electronic device includes: a multi-splitter circuit between the display area and the detection circuit, and electrically connected to at least two of the plurality of source signal lines and one of the plurality of source signal line leads, respectively, the multi-splitter circuit being configured to transmit the lighting signal provided by the source signal line leads to the at least two source signal lines at different periods of time, respectively.
Optionally, a direction from the bonding region to the lighting pad is a first direction, the at least one lighting data line extends in a direction perpendicular to the first direction, and the plurality of source signal line leads extend in the first direction.
Optionally, the multi-splitter circuit includes a first sub-circuit and a second sub-circuit, the first sub-circuit is connected to a plurality of sub-pixel columns in odd columns, and the second sub-circuit is connected to a plurality of sub-pixel columns in even columns.
Optionally, the at least one lighting data line includes a first lighting data line, a second lighting data line and a third lighting data line,
the first lighting data line, the second lighting data line and the third lighting data line are respectively electrically connected to different source signal line leads.
Optionally, the electronic device further includes at least one thin film transistor, a source of the at least one thin film transistor is electrically connected to the at least one lighting data line, and a drain of the at least one thin film transistor is electrically connected to the plurality of source signal line leads.
Optionally, the at least one lighting data line further includes a switch bus electrically connected to the gates of the plurality of thin film transistors.
Optionally, the switch bus is located on a side of the gate away from the substrate, an insulating medium is spaced between the switch bus and the gate, and the switch bus and the gate are electrically connected through a via in the insulating medium.
Reference throughout this specification to the description of “one embodiment,” “another embodiment,” or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
While embodiments of the present disclosure have been shown and described above, it will be understood that the above embodiments are exemplary and not to be construed as limiting the present disclosure, and that changes, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202011359648.X | Nov 2020 | CN | national |
