阅读说明：本技术 显示背板和移动终端 (Display backboard and mobile terminal ) 是由 胡道兵 于 2021-07-15 设计创作，主要内容包括：本发明提供了显示背板和移动终端,显示背板包括多个发光单元和至少一侦测电路,每一发光单元包括发光电路,每一发光电路包括驱动晶体管,每一侦测电路电性连接于至少两个发光单元中的驱动晶体管的源极,以至少用于侦测对应的两个发光单元中的所述驱动晶体管的源极的电压；此方案中的侦测电路可以用于侦测多个发光单元,避免在每一发光单元中设置对应的侦测电路,有效减少了侦测电路的数目,以减少发光单元中的电子器件的数目和降低电路的复杂度,提高了显示面板的透光率和电路良率。(The invention provides a display back plate and a mobile terminal, wherein the display back plate comprises a plurality of light-emitting units and at least one detection circuit, each light-emitting unit comprises a light-emitting circuit, each light-emitting circuit comprises a driving transistor, and each detection circuit is electrically connected to the source electrode of the driving transistor in at least two light-emitting units and is at least used for detecting the voltage of the source electrode of the driving transistor in the corresponding two light-emitting units; the detection circuit in the scheme can be used for detecting a plurality of light-emitting units, avoids arranging a corresponding detection circuit in each light-emitting unit, effectively reduces the number of the detection circuits, reduces the number of electronic devices in the light-emitting units, reduces the complexity of the circuits, and improves the light transmittance and the circuit yield of the display panel.)

1. A display backplane, comprising:

a plurality of light emitting cells, each of the light emitting cells including a light emitting circuit, each of the light emitting circuits including a driving transistor;

each detection circuit is electrically connected to the source electrode of the driving transistor in at least two light-emitting units and is used for detecting the voltage of the source electrode of the driving transistor in at least two corresponding light-emitting units.

2. The display backplane of claim 1, wherein the plurality of light-emitting units comprises a plurality of repeating units, each of the repeating units comprising a plurality of the light-emitting units arranged in series;

the source electrodes of the driving transistors in the light-emitting units in at least one repeating unit are electrically connected with the detection circuit.

3. The display backplane of claim 2, wherein the detection circuit comprises a detection transistor, a gate of the detection transistor is electrically connected to a detection scan line, a source of the detection transistor is electrically connected to the switching module, and a drain of the detection transistor is electrically connected to a source of the driving transistor in the corresponding at least four light emitting units;

the switching module is used for controlling the source electrode of the detection transistor to be electrically connected with a reference voltage line or the sampling module.

4. The display backplane of claim 3, wherein each of the light emitting circuits further comprises a light emitting device, an anode of the light emitting device being electrically connected to the source of the driving transistor;

when the source of the detection transistor is electrically connected to the sampling module, the light-emitting devices in the repeating unit electrically connected to the detection circuit emit light simultaneously or non-simultaneously.

5. The display backplane of claim 2, wherein a plurality of the light emitting units are arranged in an array along a first direction and a second direction, the display backplane further comprising:

a plurality of scan lines extending in the first direction and arranged in the second direction;

a plurality of data lines extending in the second direction and arranged in the first direction;

each of the light emitting circuits further includes a switching transistor, a drain of the switching transistor is electrically connected to a gate of the corresponding driving transistor, each of the scan lines is electrically connected to a gate of the switching transistor in the light emitting circuit in the plurality of light emitting units arranged along the first direction, and each of the data lines is electrically connected to a source of the switching transistor in the light emitting circuit in the plurality of light emitting units arranged along the second direction.

6. The display backplane of claim 5, wherein each of the repeating units comprises four of the light emitting units arranged in an array along the first direction and the second direction, and two of the scan lines electrically connected to the repeating units are electrically connected.

7. The display backplane of claim 5, wherein the sources of the four driving transistors in the repeating unit electrically connected to the detection circuit and the corresponding detection circuit are disposed near the center of the repeating unit.

8. The display backplane of claim 7, further comprising:

a plurality of ground lines extending in the first direction and arranged in the second direction;

the four light-emitting circuits in the repeating unit electrically connected to the detection circuit are axisymmetrical with respect to a first axis, the first axis passes through the center of the repeating unit and extends along the first direction, and the ground lines electrically connected to the corresponding four light-emitting circuits are coincident with the corresponding first axis.

9. The display backplane of claim 8, wherein the two scan lines electrically connected to the repeating unit are located on opposite sides of the repeating unit and the two data lines electrically connected to the repeating unit are located on opposite sides of the repeating unit.

10. A mobile terminal, characterized in that the mobile terminal comprises a terminal body part and a display backplane according to any one of claims 1 to 9, the terminal body part and the display backplane being combined into one body.

Technical Field

The invention relates to the technical field of display, in particular to the technical field of display panel manufacturing, and specifically relates to a display back plate and a mobile terminal.

Background

The Mini LED (sub-millimeter Light Emitting diode) backlight can be matched with the display picture of the panel to realize area-on backlight, thereby achieving million-level contrast.

The Mini LED is current-driven, and a driving transistor for driving the Mini LED needs a corresponding detection circuit for detection and compensation due to charge mobility threshold voltage drift and the like. However, the corresponding detection circuit is disposed in each light emitting unit to detect and compensate the corresponding driving transistor, which results in excessive electronic devices and complicated circuits in the light emitting unit, and reduces the light transmittance and the circuit yield of the display panel.

Therefore, it is necessary to provide a display backplane and a mobile terminal that can improve the light transmittance of the display panel and the circuit yield.

Disclosure of Invention

The embodiment of the invention provides a display back plate and a mobile terminal, and aims to solve the problem that the light transmittance and the circuit yield of a display panel are low due to the fact that the number of detection circuits is too large in the prior art.

An embodiment of the present invention provides a display backplane, including:

a plurality of light emitting cells, each of the light emitting cells including a light emitting circuit, each of the light emitting circuits including a driving transistor;

each detection circuit is electrically connected to the source electrode of the driving transistor in at least two light-emitting units and is used for detecting the voltage of the source electrode of the driving transistor in at least two corresponding light-emitting units.

In one embodiment, the plurality of light-emitting units comprises a plurality of repeating units, each of which comprises a plurality of light-emitting units arranged in series;

the source electrodes of the driving transistors in the light-emitting units in at least one repeating unit are electrically connected with the detection circuit.

In one embodiment, the detection circuit includes a detection transistor, a gate of the detection transistor is electrically connected to a detection scan line, a source of the detection transistor is electrically connected to the switching module, and a drain of the detection transistor is electrically connected to a source of the driving transistor in the corresponding at least four light emitting units;

the switching module is used for controlling the source electrode of the detection transistor to be electrically connected with a reference voltage line or the sampling module.

In an embodiment, each of the light emitting circuits further includes a light emitting device, an anode of the light emitting device is electrically connected to the source of the driving transistor;

when the source of the detection transistor is electrically connected to the sampling module, the light-emitting devices in the repeating unit electrically connected to the detection circuit emit light simultaneously or non-simultaneously.

In one embodiment, the plurality of light emitting units are arranged in an array along a first direction and a second direction, and the display backplane further includes:

a plurality of scan lines extending in the first direction and arranged in the second direction;

a plurality of data lines extending in the second direction and arranged in the first direction;

each of the light emitting circuits further includes a switching transistor, a drain of the switching transistor is electrically connected to a gate of the corresponding driving transistor, each of the scan lines is electrically connected to a gate of the switching transistor in the light emitting circuit in the plurality of light emitting units arranged along the first direction, and each of the data lines is electrically connected to a source of the switching transistor in the light emitting circuit in the plurality of light emitting units arranged along the second direction.

In an embodiment, each of the repeating units includes four light emitting units arranged in an array along the first direction and the second direction, and two scan lines electrically connected to the repeating units are electrically connected.

In one embodiment, the sources of the four driving transistors in the repeating unit electrically connected to the detection circuit and the corresponding detection circuit are disposed near the center of the repeating unit.

In one embodiment, the display backplane further comprises:

a plurality of ground lines extending in the first direction and arranged in the second direction;

the four light-emitting circuits in the repeating unit electrically connected to the detection circuit are axisymmetrical with respect to a first axis, the first axis passes through the center of the repeating unit and extends along the first direction, and the ground lines electrically connected to the corresponding four light-emitting circuits are coincident with the corresponding first axis.

In one embodiment, the two scan lines electrically connected to the repeating unit are located at two opposite sides of the repeating unit, and the two data lines electrically connected to the repeating unit are located at the other opposite sides of the repeating unit.

An embodiment of the invention provides a display panel comprising a backlight comprising a display backplane as claimed in any of the preceding claims.

An embodiment of the invention provides a display panel comprising a pixel layer comprising a display backplane as described in any of the above.

The mobile terminal comprises a terminal main body part and the display panel, wherein the terminal main body part and the display panel are combined into a whole.

The invention provides a display backboard and a mobile terminal, wherein the display backboard comprises: a plurality of light emitting cells, each of the light emitting cells including a light emitting circuit, each of the light emitting circuits including a driving transistor; each detection circuit is electrically connected to the source electrode of the driving transistor in at least two light-emitting units and is used for detecting the voltage of the source electrode of the driving transistor in at least two corresponding light-emitting units. The detection circuit is electrically connected to the source electrodes of the driving transistors in the at least two light-emitting units to detect the at least two light-emitting units, so that the detection circuit is prevented from being arranged in each light-emitting unit, the number of the detection circuits is effectively reduced, the number of electronic devices in the light-emitting units is reduced, the complexity of the circuits is reduced, and the light transmittance and the circuit yield of the display panel are improved.

Drawings

The invention is further illustrated by the following figures. It should be noted that the drawings in the following description are only for illustrating some embodiments of the invention, and that other drawings may be derived from those drawings by a person skilled in the art without inventive effort.

Fig. 1 is a circuit diagram of a display backplane according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an arrangement of light emitting units according to an embodiment of the present invention;

fig. 3 is a schematic diagram of another arrangement of light emitting units according to an embodiment of the present invention;

fig. 4 is a schematic diagram of another arrangement of light emitting units according to an embodiment of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terms "first", "second", and the like in the present invention are used for distinguishing different objects, not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or modules is not limited to the listed steps or modules but may alternatively include other steps or modules not listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Embodiments of the present invention provide a display backplane including, but not limited to, the following embodiments and combinations of the following embodiments.

In one embodiment, as shown in fig. 1, the display backplane 100 comprises: a plurality of light emitting cells 10, each of the light emitting cells 10 including a light emitting circuit 20, each of the light emitting circuits 20 including a driving transistor T2; at least one detecting circuit 30, wherein each detecting circuit 30 is electrically connected to the sources of the driving transistors T2 in at least two of the light emitting cells 10, so as to at least detect the voltage of the sources of the driving transistors T2 in the corresponding two of the light emitting cells 10.

The plurality of light emitting units 10 may be arranged along one direction, or may be divergently arranged along a plurality of directions, and further, the plurality of light emitting units 10 may be arranged along two directions perpendicular to each other to form a matrix arrangement, where the number of the light emitting units 10 may be related to the size of the display backplane 100.

Specifically, the detecting circuit 30 may be located at an edge region of the display backplane 100 to avoid reducing the utilization rate of the light emitted by the plurality of light emitting units 10, and the detecting circuit 30 may be electrically connected to the sources of the driving transistors T2 in at least two of the light emitting units 10 through a connecting wire; further, the detection circuit 30 may be electrically connected to the sources of the driving transistors T2 in at least two of the light emitting units 10 near the edge region of the display backplane 100, so as to shorten the paths between the detection circuit 30 and the sources of at least two of the driving transistors T2, thereby improving the detection reliability. Specifically, the position of the detection circuit 30 may also be determined according to the positions of the sources of the driving transistors T2 in at least two of the light emitting units 10 electrically connected to the detection circuit 30, and the detection circuit 30 may be located in a region close to the sources of at least two of the driving transistors T2, so as to improve the detection reliability.

In one embodiment, as shown in fig. 1 to 3, the plurality of light emitting units 10 includes a plurality of repeating units 40, and each of the repeating units 40 includes a plurality of light emitting units 10 connected to each other; the sources of the driving transistors T2 in the light emitting units 10 in at least one of the repeating units 40 are electrically connected to a detecting circuit 30.

Wherein a plurality of the light emitting units 10 may be constituted by a plurality of the repeating units 40, or a part of the light emitting units 10 may be constituted by a plurality of the repeating units 40, and another part of the light emitting units 10 may be arranged in other manners. It should be noted that the plurality of light emitting units 10 in each of the repeating units 40 may be arranged in series to avoid any gap between any two adjacent light emitting units 10. As shown in fig. 2 to 4, two adjacent light-emitting units 10 in the repeating unit 40 may be disposed in contact with each other to intensively distribute the plurality of light-emitting units 10 in the repeating unit 40, and the drawing is only illustrated by taking the plurality of light-emitting units 10 in the repeating unit 40 as a circle.

It is understood that the arrangement of the plurality of light emitting units 10 in the repeating unit 40 may also be related to the shape of the light emitting units 10, and specifically, may be related to the included angle of the light emitting units 10. As can be seen from fig. 1 and 4, when the light emitting units 10 are rectangular, the repeating unit 40 may also include four light emitting units 10 arranged in an array, and similarly, the repeating unit 40 in fig. 2 may also include three light emitting units 10 arranged in a central symmetry manner with an included angle of 120 °, and the repeating unit 40 in fig. 3 may also include six light emitting units 10 arranged in a central symmetry manner with an included angle of 60 °.

It should be noted that, for a plurality of the repeating units 40, it is sufficient that the sources of a plurality of the driving transistors T2 in one or more of the repeating units 40 are electrically connected to a detecting circuit 30, and in other repeating units 40, the sources of one, two or three of the driving transistors T2 in each of the repeating units 40 may be electrically connected to a detecting circuit 30, or the sources of at least two of the driving transistors T2 in different repeating units 40 may be electrically connected to a detecting circuit 30.

It can be understood that, in the embodiment, since the plurality of light emitting units 10 are arranged as the continuous repeating unit 40, the electrically connecting the detecting circuit 30 to one of the repeating units 40 not only can save the number of the detecting circuit 30, but also can avoid the paths of the detecting circuit 30 and the plurality of light emitting units 10 from being dispersed, and shorten the total length of the paths of the detecting circuit 30 and the plurality of light emitting units 10, thereby improving the reliability of detection.

In one embodiment, as shown in fig. 1, the detecting circuit 30 includes a detecting transistor T3, a gate of the detecting transistor T3 is electrically connected to the detecting scan line 301, a source of the detecting transistor T3 is electrically connected to the switching module 302, and a drain of the detecting transistor T3 is electrically connected to a source of the driving transistor T2 in the corresponding plurality of light emitting units 10; the switching module 302 is configured to control the source of the detecting transistor T3 to be electrically connected to a reference voltage line or a sampling module.

Specifically, the electrical signal in the detection scan line 301 may control the detection transistor T3 to be turned on, further, in the reset phase, the switching module 302 may control the source of the detection transistor T3 to be electrically connected to the reference voltage line, so as to load the electrical signal in the reference voltage line to the source of the driving transistor T2 through the detection transistor T3 for resetting, and in the detection phase, the switching module 302 may control the source of the detection transistor T3 to be electrically connected to the sampling module, so that the sampling module collects the voltage value of the source of the driving transistor T2 through the detection transistor T3. The switching module 302 may include, but is not limited to, a plurality of transistors.

In an embodiment, each of the light emitting circuits 20 further includes a light emitting device 201, and an anode of the light emitting device 201 is electrically connected to the source of the driving transistor T2; when the source of the detecting transistor T3 is electrically connected to the sampling module, the light emitting devices 201 in the repeating unit 40 electrically connected to the detecting circuit 30 emit light simultaneously or not.

It should be noted that the detecting stage occurs at a corresponding device where at least one of the light emitting devices 201 emits light. Specifically, when the light emitting device 201 emits light, the corresponding sampling module may collect the voltage value of the source of the driving transistor T2 in real time through the corresponding detection circuit 30, and further, the voltage value of the source of the driving transistor T2 may be compared with a preset voltage value, so as to compensate the driving transistor T2.

It can be understood that, when at least two of the light emitting devices 201 in the repeating unit 40 electrically connected to the detecting circuit 30 emit light, the voltages of the anodes of the at least two light emitting devices 201 emitting light may be the same or different, and finally a target voltage value is presented at the drain of the detecting transistor T3, and the sampling module may collect the target voltage value as the voltage value of the anodes of the at least two light emitting devices 201 emitting light through the detecting transistor T3, and perform the same compensation on the at least two light emitting devices 201 emitting light according to the target voltage value. Of course, when the light emitting devices 201 in the repeating unit 40 electrically connected to the detecting circuit 30 do not emit light at the same time, the sampling module may collect the voltage value of the anode of the light emitting device 201 through the detecting transistor T3 when one of the light emitting devices 201 emits light, so as to compensate the light emitting device 201, and so on, the light emitting device 201 emitting light at a subsequent time may also perform the above operation.

Further, a switch module may be disposed between the detection circuit 30 and each of the light emitting devices 201 electrically connected to the detection circuit 30, and the switch module is configured to control conduction between the detection circuit 30 and the corresponding light emitting device 201. It can be understood that, when at least two of the light emitting devices 201 in the repeating unit 40 electrically connected to the detecting circuit 30 emit light, the detecting circuit 30 and different light emitting devices 201 can be turned on at different times by controlling the plurality of switch modules, so that the voltage value of the anode of the corresponding light emitting device 201 is collected at different times to compensate the corresponding driving transistor T2, thereby avoiding collecting only one target voltage value, and improving the reliability of detection and compensation.

In one embodiment, as shown in fig. 1, the plurality of light emitting units 10 are arranged in an array along a first direction 01 and a second direction 02, and the display backplane 100 further includes: a plurality of scan lines 50, the plurality of scan lines 50 extending along the first direction 01 and being arranged along the second direction 02; a plurality of data lines 60, the plurality of data lines 60 extending in the second direction 02 and arranged in the first direction 01; each of the light emitting circuits 20 further includes a switching transistor T1, a drain of the switching transistor T1 is electrically connected to a gate of the corresponding driving transistor T2, each of the scan lines 50 is electrically connected to a gate of the switching transistor T1 in the light emitting circuit 20 of the plurality of light emitting cells 10 arranged along the first direction 01, and each of the data lines 60 is electrically connected to a source of the switching transistor T1 in the light emitting circuit 20 of the plurality of light emitting cells 10 arranged along the second direction 02.

It should be noted that for convenience of description, it is understood that a plurality of rows of the light emitting cells 10 are arranged along the second direction 02 and a plurality of columns of the light emitting cells 10 are arranged along the first direction. Specifically, the electrical signals in the plurality of scan lines 50 may be different to control the switching transistors T1 in the plurality of rows of light emitting cells 10 to be turned on at different times; the electrical signals in the plurality of data lines 60 may be the same or different, and when the switching transistor T1 in one row of the light emitting cells 10 is turned on, the electrical signals in the plurality of data lines 60 are applied to the gate of the driving transistor T2 through the corresponding plurality of switching transistors T1, respectively.

As shown in fig. 1, for one of the light emitting units 10, in the writing phase, the electrical signal in the scan line 50 controls the switching transistor T1 to be turned on, and simultaneously, the electrical signal in the data line 60 is loaded to the gate of the driving transistor T2 through the switching transistor T1; further, the gate of the driving transistor T2 is electrically connected to one end of a capacitor C, and the other end of the capacitor C is electrically connected to the ground or the source of the driving transistor T2, so that when the switching transistor T1 is turned off, the capacitor C can maintain the voltage at the gate of the driving transistor T2 similar to the electrical signal in the data line 60.

In one embodiment, each of the repeating units 40 includes four light emitting units 10 arranged in an array along the first direction 01 and the second direction 02, and two of the scan lines 50 electrically connected to the repeating units 40 are electrically connected.

It is to be understood that a plurality of the light emitting cells 10 are arrayed in the first direction 01 and the second direction 02, and each of the repeating units 40 may include four or more of the light emitting cells 10 arrayed in the first direction 01 and the second direction 02. It should be noted that, since the four light emitting units 10 are arranged as a continuous repeating unit 40, and 4 is a minimum number which is greater than 1 and can be arranged in a matrix, electrically connecting the detecting circuit 30 to one repeating unit 40 not only can save the number of the detecting circuit 30, but also can avoid the paths of the detecting circuit 30 and the four light emitting units 10 from being dispersed, and shorten the total length of the paths of the detecting circuit 30 and the four light emitting units 10, thereby improving the reliability of detection.

As can be seen from the above analysis, the switching transistors T1 in the light emitting cells 10 in a plurality of rows can be controlled to be turned on at different times according to the electrical signals in the plurality of scanning lines 50; however, in the present embodiment, the two scan lines 50 electrically connected to the repeating unit 40 are electrically connected, so that the four switch transistors T1 electrically connected to the repeating unit 40 can be simultaneously turned on, so that the corresponding four light emitting devices 201 can simultaneously emit light, and the anode voltages of the corresponding four light emitting devices 201 can be simultaneously collected as the corresponding target voltage values, thereby improving the detection efficiency.

In one embodiment, as shown in fig. 1, the sources of the four driving transistors T2 in the repeating unit 40 electrically connected to the detecting circuit 30 and the corresponding detecting circuit 30 are disposed near the center of the repeating unit 40.

It can be understood that, four of the light emitting units 10 in the repeating unit 40 are arranged in an array, that is, the distance from the center of the repeating unit 40 to each of the light emitting circuits 20 can be smaller, and therefore, the distance from the corresponding detecting circuit 30 to the source of the corresponding four driving transistors T2 can be smaller by disposing the corresponding detecting circuit 30 close to the center of the repeating unit 40; further, by disposing the sources of the corresponding four driving transistors T2 close to the center of the repeating unit 40, the distance between the source of each driving transistor T2 and the corresponding detecting circuit 30 can be reduced. Therefore, the present embodiment shortens the total length of the paths of the detecting circuit 30 and the four light emitting units 10 by properly positioning the detecting circuit 30 and the sources of the four driving transistors T2 in the repeating unit 40, thereby improving the reliability of detection.

In one embodiment, as shown in fig. 1, the display backplane 100 further includes: a plurality of ground lines 70, the plurality of ground lines 70 extending in the first direction 01 and being arranged in the second direction 02; the four light emitting circuits 20 in the repeating unit 40 electrically connected to the detecting circuit 30 are axisymmetric with respect to a first axis passing through the center of the repeating unit 40 and extending along the first direction 01, and the ground lines 70 electrically connected to the corresponding four light emitting circuits 20 are coincident with the corresponding first axes.

Specifically, as shown in fig. 1, the first axis may be understood as a symmetry axis of the corresponding repeating unit 40 in the first direction 01, that is, the grounding line 70 may bisect and correspond to the repeating unit 40 in the second direction 02, that is, four light emitting circuits 20 electrically connected to the same grounding line 70 may be symmetrically distributed about the grounding line 70. Further, the four corresponding light emitting devices 201 may be symmetrically distributed about the ground line 70, and since the cathodes of the four corresponding light emitting devices 201 may be electrically connected to the ground line 70, the cathodes of the four corresponding light emitting devices 201 may be disposed close to the corresponding ground line 70. Further, each of the light emitting devices 201 may include a plurality of organic light emitting semiconductors connected in series or a plurality of light emitting diodes connected in series, and the plurality of organic light emitting semiconductors connected in series or the plurality of light emitting diodes connected in series may be arranged along the second direction 02.

Further, the display back panel 100 further includes: a plurality of working voltage lines 80, the plurality of working voltage lines 80 extending in the second direction 02 and arranged in the first direction 01; in the repeating unit 40, the working voltage line 80 electrically connected to the corresponding four light emitting circuits 20 is located between two adjacent light emitting circuits 20 arranged along the first direction 01. It should be noted that, after each of the working voltage lines 80 and each of the grounding lines 70 intersect with each other, four regions are formed at the boundary of the corresponding repeating unit 40, and the detecting circuit 30 electrically connected to the corresponding repeating unit 40 can be located in any one of the four regions, that is, the detecting circuit 30 can be disposed close to any one of the light emitting circuits 20.

Wherein the write phase may be located between the reset phase and the snoop phase; the grounding line 70 may be grounded, and the drain of the driving transistor T2 may be electrically connected to the corresponding working voltage line 80, that is, after the writing phase is finished, the driving transistor T2 may be turned on, and the electrical signal on the working voltage line 80 is loaded to the anode of the light emitting device 201 through the driving transistor T2, so that the light emitting device 201 emits light to enter the light emitting phase.

In one embodiment, as shown in fig. 1, the two scan lines 50 electrically connected to the repeating unit 40 are located at two opposite sides of the repeating unit 40, and the two data lines 60 electrically connected to the repeating unit 40 are located at the other opposite sides of the repeating unit 40.

As can be understood from the above analysis, for the repeating unit 40, since the corresponding ground line 70 is located between the two light emitting circuits 20 arranged along the second direction 02 and the corresponding operating voltage line 80 is located between the two light emitting circuits 20 arranged along the first direction 01, the corresponding two scanning lines 50 and the corresponding two data lines 60 are arranged at the edge of the repeating unit 40, and in the case where the ground line 70 and the operating voltage line 80 are shared, the signal interference of the two scanning lines 50 to the ground line 70 and the signal interference of the two data lines 60 to the operating voltage line 80 can be avoided.

An embodiment of the invention provides a display panel, which includes a backlight panel including the display backplane as described in any of the above. Specifically, the display backplane may be understood as a thin film transistor array, and the display panel in this embodiment may further include a pixel layer, a liquid crystal layer, and a color film layer on the backlight, where the backlight may be made of any of the display backplanes described above, and the display panel in this embodiment may be a liquid crystal display panel.

Embodiments of the present invention provide a display panel comprising a pixel layer comprising a display backplane as described in any of the above. Specifically, the display panel in this embodiment may be a self-luminous display panel of an organic light emitting semiconductor, that is, the display panel in this embodiment may not need a backlight, the display backplane may be understood as a thin film transistor array, and the display backplane may be provided with a light emitting layer, which may include, but is not limited to, an organic light emitting semiconductor device.

The embodiment of the invention provides a mobile terminal, which comprises a terminal main body part and a display panel, wherein the terminal main body part and the display panel are combined into a whole.

The invention provides a display backboard and a mobile terminal, wherein the display backboard comprises: a plurality of light emitting cells, each of the light emitting cells including a light emitting circuit, each of the light emitting circuits including a driving transistor; each detection circuit is electrically connected to the source electrode of the driving transistor in at least two light-emitting units and is used for detecting the voltage of the source electrode of the driving transistor in at least two corresponding light-emitting units. The detection circuit is electrically connected to the source electrodes of the driving transistors in the at least two light-emitting units to detect the at least two light-emitting units, so that the detection circuit is prevented from being arranged in each light-emitting unit, the number of the detection circuits is effectively reduced, the number of electronic devices in the light-emitting units is reduced, the complexity of the circuits is reduced, and the light transmittance and the circuit yield of the display panel are improved.

The display back panel and the mobile terminal provided by the embodiment of the invention are described in detail, a specific example is applied in the description to explain the principle and the implementation of the invention, and the description of the embodiment is only used for helping to understand the technical scheme and the core idea of the invention; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.