Display substrate, display panel, display device and control method

Abstract

The present invention discloses a display substrate, a display panel, a display device, and a control method to improve the problem of uneven brightness between the camera area and the display area outside the camera. The display substrate includes: a first display area for arranging the camera and a second display area located outside the first display area; the first display area includes a plurality of first light-emitting units, and the second display area includes a plurality of second light-emitting units; the display substrate also includes: a first power line and a second power line that are insulated from each other, wherein at least some of the first light-emitting units in the first display area are electrically connected to the first power line, and at least some of the second light-emitting units in the second display area are electrically connected to the second power line.

Description

Technical Field

[0001] The present invention relates to the field of semiconductor technology, and in particular to a display substrate, a display panel, a display device and a control method. Background Art

[0002] When implementing under-screen camera technology (Full Display Camera, FDC) with built-in pixel circuits, the indium tin oxide (ITO) traces inside the FDC cause the ITO loading to cause the FDC and the area above it to be brighter. Furthermore, the FDC area is brighter overall. Summary of the Invention

[0003] The present invention provides a display substrate, a display panel, a display device and a control method, so as to improve the problem of uneven brightness between an area where a camera is located and a display area outside the camera.

[0004] An embodiment of the present invention provides a display substrate, comprising: a first display area for arranging a camera and a second display area located outside the first display area; the first display area comprises a plurality of first light-emitting units, and the second display area comprises a plurality of second light-emitting units;

[0005] The display substrate further includes: a first power line and a second power line insulated from each other, wherein at least part of the first light-emitting units in the first display area are electrically connected to the first power line, and at least part of the second light-emitting units in the second display area are electrically connected to the second power line.

[0006] In a possible implementation, the display substrate further includes a data line, and a signal of the data line is transmitted from the first end to the second end along an extension direction of the data line;

[0007] In the second display area, the second light emitting unit located on a side of the first display area away from the first end and in the same column as the first light emitting unit in the first display area is electrically connected to the first power line.

[0008] In a possible implementation, the display substrate further includes: a third power line insulated from the first power line and the second power line;

[0009] In the first display area, the first light-emitting unit closest to the edge of the first display area is electrically connected to the third power line;

[0010] And / or, in the second display area, the second light-emitting unit closest to the edge of the first display area is electrically connected to the third power line.

[0011] In a possible implementation, in the first display area, all of the first light-emitting units except those electrically connected to the third power line are electrically connected to the first power line;

[0012] In the second display area, all the second light-emitting units except those electrically connected to the third power line and the first power line are electrically connected to the second power line.

[0013] In a possible implementation, the first power line and the second power line are located in different layers; and the third power line and the second power line are located in different layers.

[0014] In a possible implementation, the display substrate includes a plurality of signal lines, and the signal lines in the first display area are made of a transparent material.

[0015] In a possible implementation, the signal line includes: a gate line and / or the data line.

[0016] An embodiment of the present invention further provides a display panel, comprising the display substrate provided by the embodiment of the present invention.

[0017] An embodiment of the present invention further provides a display device, comprising the display panel provided by the embodiment of the present invention.

[0018] An embodiment of the present invention further provides a method for controlling the display panel provided in the embodiment of the present invention, comprising:

[0019] applying a first power signal to at least part of the first light-emitting units in the first display area through a first power line;

[0020] supplying a second power signal line to at least part of the second light-emitting units in the second display area via the second power line;

[0021] The first power signal and the second power signal are controlled to be different so that the light emitting brightness of the first light emitting unit in the first display area is consistent with the light emitting brightness of the second light emitting unit in the second display area.

[0022] The beneficial effects of the embodiments of the present invention are as follows: In the embodiments of the present invention, the display panel includes a first power line and a second power line insulated from each other, at least part of the first light-emitting units in the first display area is electrically connected to the first power line, and at least part of the second light-emitting units in the second display area is electrically connected to the second power line, that is, the first light-emitting units in the first display area can independently control the brightness by the size of the power signal loaded by the first power line, and the second light-emitting units in the second display area can independently control the brightness by the size of the power signal loaded by the second power line. When the brightness of the first display area and the second display area is uneven because the signal line in the first display area needs to be made of a material different from that of the signal line in the second display area, the brightness of the first display area and the second display area can be independently controlled by the setting of the first power line and the second power line, thereby improving the problem of uneven brightness between the first display area and the second display area. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is one of the schematic diagrams of a display substrate provided by an embodiment of the present invention;

[0024] Figure 2 for Figure 1 A partially enlarged schematic diagram of the first display area;

[0025] Figure 3 A second schematic diagram of a display substrate provided by an embodiment of the present invention;

[0026] Figure 4 for Figure 3 An enlarged schematic diagram of the first display area S1 and its surroundings;

[0027] Figure 5 A third schematic diagram of a display substrate provided by an embodiment of the present invention;

[0028] Figure 6 for Figure 5 An enlarged schematic diagram of the first display area S1 and its surroundings;

[0029] Figure 7 A fourth schematic diagram of a display substrate provided by an embodiment of the present invention;

[0030] Figure 8 for Figure 7 An enlarged schematic diagram of the first display area S1 and its surroundings;

[0031] Figure 9 A fifth schematic diagram of a display substrate provided by an embodiment of the present invention;

[0032] Figure 10 for Figure 9 An enlarged schematic diagram of the first display area S1 and its surroundings;

[0033] Figure 11A schematic diagram of a method for controlling a display substrate provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0035] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the usual meanings understood by persons of ordinary skill in the field to which this disclosure belongs. The words "first", "second" and similar terms used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0036] In order to keep the following description of the embodiments of the present disclosure clear and concise, the present disclosure omits detailed descriptions of known functions and known components.

[0037] For built-in FDC design, transparent ITO wiring is required in the FDC area. The ITO material has high impedance, resulting in a heavy load in the FDC area. Specifically, the heavy load affects the display: for the data line (Data line), the pixels above the FDC area are affected by the Data line load in the FDC area, resulting in a higher brightness. For the gate line (Gate line), the ITO load causes the Gate signal rise delay time Tr (such as the voltage rising to 80% of the maximum value) and fall delay time Tf (such as the voltage falling to 80% of the maximum value) to be too long, further affecting the time it takes to open the switch during charging, resulting in a difference between the required value and the actual value of the gate voltage, which in turn causes a display difference, making the brightness of the FDC area and directly above the FDC brighter.

[0038] In view of this, see Figure 1 and Figure 2 As shown, Figure 2 for Figure 1In the locally enlarged schematic diagram of the first display area, an embodiment of the present invention provides a display substrate, including: a first display area S1 for setting a camera and a second display area S2 located outside the first display area S1; the first display area S1 includes a plurality of first light-emitting units A1, and the second display area S2 includes a plurality of second light-emitting units A2; specifically, the first light-emitting unit A1 may include a first light-emitting device and a first pixel circuit located between the first light-emitting device and the substrate for driving the first light-emitting device, specifically, the first pixel circuit may be located directly below the first light-emitting device, and the first pixel circuit may be located in the first display area S1; the second light-emitting unit A2 may include a second light-emitting device and a second pixel circuit located between the second light-emitting device and the substrate for driving the second light-emitting device, specifically, the second pixel circuit may be located in the second light-emitting device. Directly below the optical device; specifically, the size of the first light-emitting unit A1 can be smaller than the size of the second light-emitting unit A2, so as to achieve a higher light transmittance in the first display area S1, and when the camera is set in the first display area S1, the collection of external light is achieved; specifically, the size of the first light-emitting unit A1 can be smaller than the size of the second light-emitting unit A2, which can be understood as mainly reducing the pixel circuit, that is, the size of the first pixel circuit is smaller than the size of the second pixel circuit, specifically, the size of the first pixel circuit can be understood as the area occupied by the orthographic projection of multiple elements (for example, thin film transistors and / or capacitors) included in the first pixel circuit on the substrate, similarly, the size of the second pixel circuit can be understood as the area occupied by the orthographic projection of multiple elements (for example, thin film transistors and / or capacitors) included in the second pixel circuit on the substrate;

[0039] The display substrate further includes: a first power line L1 and a second power line L2 insulated from each other, wherein at least part of the first light-emitting units A1 of the first display area S1 is electrically connected to the first power line L1, and at least part of the second light-emitting units A2 of the second display area S2 is electrically connected to the second power line L2.

[0040] In an embodiment of the present invention, the display panel includes a first power line L1 and a second power line L2 that are insulated from each other. At least some of the first light-emitting units A1 in the first display area S1 are electrically connected to the first power line L1, and at least some of the second light-emitting units A2 in the second display area S2 are electrically connected to the second power line L2. That is, the first light-emitting units A1 in the first display area S1 can independently control the brightness according to the magnitude of the power signal loaded through the first power line L1, and the second light-emitting units A2 in the second display area S2 can independently control the brightness according to the magnitude of the power signal loaded through the second power line L2. When the brightness of the first display area S1 and the second display area S2 is uneven because the signal lines in the first display area S1 need to be made of different signal line materials from those in the second display area S2, the independent control of the brightness of the first display area S1 and the second display area S2 can be achieved through the settings of the first power line L1 and the second power line L2, and the problem of uneven brightness between the first display area S1 and the second display area S2 can be improved.

[0041] The Ids current formula of the driving transistor DTFT device in the pixel circuit is Ids = K * (V data - VDD) 2 (where K is a constant). According to this formula, it can be seen that adjusting the VDD signal can change the magnitude of Ids and further control the magnitude of the current. Since the overall brightness of the FDC area and above is relatively bright, the VDD1 signal loaded through the first power line L1 is used in the FDC (the first display area S1), and the VDD2 signal loaded through the second power line L2 is used to control the non-FDC area (the second display area S2). Since the operating voltage of the DTFT is on the left side of the Ids parabola (i.e., Vdata < VDD), to reduce the brightness of the FDC and above areas, reducing the VDD1 signal loaded through the first power line L1 can be achieved.

[0042] Specifically, in a possible implementation manner, for example, as shown in Figure 2 , all of the first light-emitting units A1 in the first display area S1 may be electrically connected to the first power line L1, and all of the second light-emitting units A2 in the second display area S2 may be electrically connected to the second power line L2.

[0043] In specific implementation, since when the data line transmits from the first end to the second end, along the signal transmission direction, the later signal is more affected by the load, which further causes the problem that the overall brightness of the first display area S1 and the area of the first display area S1 far from the first end is inconsistent with the brightness of the rest of the second display area S2. Based on this, in another possible implementation manner of the embodiment of the present invention, as shown in Figure 3 and Figure 4 , where Figure 4 is Figure 3In the enlarged schematic diagram of the first display area S1 and its periphery, the display substrate further includes a data line (not shown in the figure), and the signal of the data line is transmitted from the first end to the second end along the extension direction of the data line; in the second display area S2, the second light-emitting unit A2 located on the side of the first display area S1 away from the first end and located in the same column as the first light-emitting unit of the first display area S1 is electrically connected to the first power line L1. In this way, the overall brightness of the first display area S1 and the area of ​​the first display area S1 away from the first end can be made consistent with the brightness of the rest of the second display area S2. Specifically, for example, the data line can be Figure 3 and Figure 4 The data line extends vertically, and the data line signal can be transmitted from bottom to top. In the second display area S2, the second light-emitting unit A2 located above the first display area S1 and in the same column as the first light-emitting unit A1 in the first display area S1 is also electrically connected to the first power line L1.

[0044] In a specific implementation, there will be a difference in brightness between the boundary of the first display area S1 and the interior of the first display area S1 and the brightness of the second display area S2 outside, thereby causing the problem of uneven visual perception of brightness. Based on this, in the embodiment of the present invention, see Figure 5-10 As shown, Figure 6 for Figure 5 An enlarged schematic diagram of the first display area S1 and its surroundings, wherein: Figure 8 for Figure 7 An enlarged schematic diagram of the first display area S1 and its surroundings, wherein: Figure 10 for Figure 9 An enlarged schematic diagram of the first display area S1 and its surroundings; the display substrate further includes: a third power line L3 insulated from the first power line L1 and the second power line L2;

[0045] Specifically, in a possible implementation manner, as Figure 5 and Figure 6 As shown, in the first display area S1, the first light-emitting units A1 closest to the edge of the first display area S1 are electrically connected to the third power line L3. For example, a circle of first light-emitting units A1 inside the edge of the first display area S1 are electrically connected to the third power line L3.

[0046] Specifically, in another possible implementation, as Figure 7 and Figure 8 As shown, in the second display area S2, the second light-emitting units A2 closest to the edge of the first display area S1 are electrically connected to the third power line L3. For example, a circle of second light-emitting units A2 outside the edge of the first display area S1 are electrically connected to the third power line L3.

[0047] Specifically, in another possible implementation, as Figure 9 and Figure 10 As shown, in the first display area L1, the first light-emitting unit A1 closest to the edge of the first display area S1 is electrically connected to the third power line. At the same time, in the second display area S2, the second light-emitting unit A2 closest to the edge of the first display area S1 is electrically connected to the third power line L3. That is, a circle of first light-emitting units A1 inside the edge of the first display area S1 is electrically connected to the third power line L3, and a circle of second light-emitting units A2 outside the edge of the first display area S1 is electrically connected to the third power line L3.

[0048] In an embodiment of the present invention, in the first display area S1, the first light-emitting unit A1 closest to the edge of the first display area S1 is electrically connected to the third power line L3, and / or, in the second display area S2, the second light-emitting unit A2 closest to the edge of the first display area S1 is electrically connected to the third power line L3, which can improve the brightness at the boundary of the first display area S1 and the problem of uneven brightness between the interior of the first display area S1 and the second display area S2 outside the first display area S1.

[0049] In one possible implementation, see Figure 9 and Figure 10 As shown, in the first display area S1, the remaining first light-emitting units A1 except those electrically connected to the third power line L3 are all electrically connected to the first power line L1; in the second display area S2, the remaining second light-emitting units except those electrically connected to the third power line L3 and the first power line L1 are all electrically connected to the second power line L2.

[0050] In a possible implementation, the first power line L1 and the second power line L2 may be located in different layers; and the third power line L3 and the second power line L2 may be located in different layers.

[0051] In one possible embodiment, the display substrate includes multiple signal lines, and the signal lines in the first display area S1 are made of a transparent material. Specifically, the signal lines in the first display area S1 may be made of a transparent oxide, such as indium tin oxide (ITO). Specifically, the signal lines in the second display area S2 may be made of a metal. The impedance of the signal lines in the first display area S1 may be greater than the impedance of the signal lines in the second display area S2. Specifically, the same signal line may be made of a transparent oxide material in the first display area S1 and of a metal material in the second display area S2. Specifically, the signal lines may include gate lines and / or data lines.

[0052] Based on the same inventive concept, an embodiment of the present invention further provides a display panel, including the display substrate provided by the embodiment of the present invention.

[0053] Based on the same inventive concept, an embodiment of the present invention further provides a display device, including the display panel according to the embodiment of the present invention.

[0054] Based on the same inventive concept, an embodiment of the present invention further provides a control method for a display panel as an example of the present invention, see Figure 11 Shown, including:

[0055] Step S100: applying a first power signal to at least part of the first light-emitting units in the first display area through a first power line;

[0056] Step S200: supplying a second power signal line to at least part of the second light-emitting units in the second display area via a second power line;

[0057] Step S300: controlling the first power signal and the second power signal to be different so that the light emitting brightness of the first light emitting unit in the first display area is consistent with the light emitting brightness of the second light emitting unit in the second display area.

[0058] The beneficial effects of the embodiments of the present invention are as follows: In the embodiments of the present invention, the display panel includes a first power line L1 and a second power line L2 that are insulated from each other, at least part of the first light-emitting unit A1 of the first display area S1 is electrically connected to the first power line L1, and at least part of the second light-emitting unit A2 of the second display area S2 is electrically connected to the second power line L2, that is, the first light-emitting unit A1 of the first display area S1 can independently control the brightness by the size of the power signal loaded by the first power line L1, and the second light-emitting unit A2 of the second display area S2 can independently control the brightness by the size of the power signal loaded by the second power line L2. When the brightness of the first display area S1 and the second display area S2 are uneven because the signal line in the first display area S1 needs to be made of a signal line material different from that of the second display area S2, the brightness of the first display area S1 and the second display area S2 can be independently controlled by the setting of the first power line L1 and the second power line L2, thereby improving the problem of uneven brightness between the first display area S1 and the second display area S2.

[0059] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A display substrate, characterized in that: include: A first display area for setting a camera and a second display area located outside the first display area; the first display area includes a plurality of first light-emitting units, and the second display area includes a plurality of second light-emitting units; The display substrate further includes: a first power line and a second power line insulated from each other, wherein at least part of the first light-emitting units in the first display area are electrically connected to the first power line, and at least part of the second light-emitting units in the second display area are electrically connected to the second power line; The display substrate further includes a data line, wherein a signal of the data line is transmitted from the first end to the second end along an extension direction of the data line; In the second display area, the second light emitting unit located on a side of the first display area away from the first end and in the same column as the first light emitting unit in the first display area is electrically connected to the first power line.

2. The display substrate according to claim 1, wherein The display substrate further includes: a third power line insulated from the first power line and the second power line; In the first display area, the first light-emitting unit closest to the edge of the first display area is electrically connected to the third power line; And / or, in the second display area, the second light-emitting unit closest to the edge of the first display area is electrically connected to the third power line.

3. The display substrate according to claim 2, wherein: In the first display area, all the first light-emitting units except those electrically connected to the third power line are electrically connected to the first power line; In the second display area, all the second light-emitting units except those electrically connected to the third power line and the first power line are electrically connected to the second power line.

4. The display substrate according to claim 2, wherein: The first power line and the second power line are located in different layers; the third power line and the second power line are located in different layers.

5. The display substrate according to claim 1, wherein The display substrate includes a plurality of signal lines, and the signal lines in the first display area are made of a transparent material.

6. The display substrate according to claim 5, wherein: The signal line includes: a gate line and / or the data line.

7. A display panel, characterized in that: The display substrate comprises the display substrate according to any one of claims 1 to 6.

8. A display device, characterized in that: Comprising the display panel as claimed in claim 7.

9. A method for controlling a display substrate according to any one of claims 1 to 6, characterized in that: include: applying a first power signal to at least part of the first light-emitting units in the first display area through a first power line; supplying a second power signal line to at least part of the second light-emitting units in the second display area via the second power line; The first power signal and the second power signal are controlled to be different so that the light emitting brightness of the first light emitting unit in the first display area is consistent with the light emitting brightness of the second light emitting unit in the second display area.

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