CN115909890A

CN115909890A - Display panel and display device

Info

Publication number: CN115909890A
Application number: CN202110989060.0A
Authority: CN
Inventors: 张晓亮; 王吉思
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2021-08-26
Filing date: 2021-08-26
Publication date: 2023-04-04
Also published as: WO2023025055A1

Abstract

The application discloses a display panel and a display device. The display panel comprises a main display area and an auxiliary display area, wherein the main display area surrounds the auxiliary display area; the auxiliary display area comprises a plurality of sub-display areas arranged in an array, and each sub-display area comprises N light-emitting units and a control unit; the control units in the same row receive a first signal through a first wire connected with the main display area, and the control units in the same column receive a second signal through a second wire connected with the main display area; for any sub-display area, the control unit is respectively electrically connected with the N light-emitting units and is used for controlling a first signal and a second signal to be input into the N light-emitting units according to a preset sequence; n is an integer greater than or equal to 2. The technical scheme of this application can light the pixel in the vice display area in proper order according to the chronogenesis to reduce the interior line quantity of walking of vice display area, thereby when guaranteeing vice display area transmissivity, promote the display effect of vice display area.

Description

Display panel and display device

Technical Field

The application relates to the technical field of display, in particular to a display panel and a display device.

Background

With the development of display technologies, users have higher and higher requirements on screen occupation ratios of display screens of electronic devices, so that comprehensive screen display of electronic devices is receiving more and more attention in the industry. The appearance of the under-screen camera technology enables a real comprehensive screen to become reality, and how to improve the photographing effect of the under-screen camera is the most key factor for the under-screen camera technology to be really popular.

Disclosure of Invention

The main objective of the embodiment of the application is to provide a display panel and a display device, which can sequentially light pixels in an auxiliary display area according to a time sequence, and reduce the number of wires in the auxiliary display area, thereby improving the display effect of the auxiliary display area while ensuring the transmittance of the auxiliary display area.

The embodiment of the application provides a display panel, which comprises a main display area and an auxiliary display area, wherein the main display area surrounds the auxiliary display area; wherein, the first and the second end of the pipe are connected with each other,

the auxiliary display area comprises a plurality of sub-display areas arranged in an array, and each sub-display area comprises N light-emitting units and a control unit; the control units in the same row receive first signals through a first wire connected with the main display area, and the control units in the same column receive second signals through a second wire connected with the main display area;

for any sub-display area, the control unit is respectively and electrically connected with the N light-emitting units and is used for controlling the first signal and the second signal to be input into the N light-emitting units according to a preset sequence; n is an integer greater than or equal to 2.

The embodiment of the application also provides a display device which comprises the display panel with any one of the characteristics.

The application provides a display panel and a display device, which divide a sub-display area into a plurality of sub-display areas arranged in an array, wherein each sub-display area comprises N light-emitting units and a control unit; for any sub-display area, the control unit is respectively electrically connected with the N light-emitting units, and can control the first signal and the second signal to be input into the N light-emitting units according to a preset sequence, so that the purpose of sequentially lightening the pixels in the sub-display area according to a time sequence is achieved. Meanwhile, the first wiring and the second wiring are electrically connected with the control unit, and the control unit is respectively electrically connected with the N light-emitting units, so that the wiring number in the auxiliary display area can be reduced, and the display effect of the auxiliary display area is improved while the transmittance of the auxiliary display area is ensured.

With respect to the above embodiments and other aspects of the present application and implementations thereof, further description is provided in the accompanying drawings description, detailed description and claims.

Drawings

Fig. 1 is a schematic top view of a display panel according to an embodiment;

fig. 2 is a schematic cross-sectional view of a display panel according to an embodiment;

FIG. 3 is a schematic diagram of a diffraction phenomenon provided by an embodiment;

FIG. 4 is a schematic diagram of a display panel with light spots caused by interference and diffraction phenomena during an imaging process according to an embodiment;

fig. 5 is a schematic diagram illustrating a trace of a display panel according to an embodiment;

FIG. 6 is a schematic diagram of a sub-display area according to an embodiment;

fig. 7 is a circuit diagram of a light emitting unit according to an embodiment;

FIG. 8 is a schematic diagram of another embodiment of a sub-display area;

FIG. 9 is a diagram illustrating a structure of another sub-display area according to an embodiment;

fig. 10 is a schematic structural diagram of a display device according to an embodiment.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

Also, the drawings and description of the embodiments are to be regarded as illustrative in nature, and not as restrictive. Like reference numerals refer to like elements throughout the specification. In addition, the thickness or size of some layers, films, panels, regions, etc. may be exaggerated in the drawings for understanding and ease of description. It will also be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. In addition, "on 8230" \\ 8230 "; on" means to position an element on or under another element, but does not essentially mean to position on the upper side of the other element according to the direction of gravity. For ease of understanding, the figures in this application all depict an element on the top side of another element.

In addition, unless explicitly described to the contrary, the word "comprise" and variations such as "comprises" or "comprising", will be understood to imply the inclusion of stated elements but not the exclusion of any other elements.

It should also be noted that, in the embodiments of the present application, the various components are described by "first", "second", and the like, but these components should not be limited by these terms. These terms are only used to distinguish one component from another. Also, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

While certain embodiments may be practiced differently, the specific process sequence may be performed differently than described. For example, two processes described consecutively may be performed at substantially the same time or in an order reverse to that described.

With the development of display technology, the requirements of users on the screen occupation ratio of the display screen of the electronic equipment are higher and higher. At present, bang screen, water droplet screen, dig display screens such as hole screen have improved the screen of display screen to a certain extent and have accounted for the ratio, the appearance of camera technique under the screen till for real comprehensive screen becomes reality. The under-screen camera technology refers to: divide into two regions with the display screen, be the region A that is used for normally showing the picture and the region B that is used for placing the camera under the screen respectively, also be provided with luminescence unit (pixel) in the region B, only luminescence unit's in the region B arrange different with the luminescence unit's in the region A of arranging, the luminousness is also higher with the material that luminescence unit in the region A used to its material that uses, thereby make region B can have higher luminousness, make the camera have better formation of image effect under the screen.

The existing under-screen camera technology mainly adopts two methods to improve the image quality of images acquired by a camera:

one method is to enlarge the area of a single light-emitting unit in an area B as much as possible, reduce the number of gate lines and data lines in the area, and reduce the number of active Thin Film Transistor (TFT) devices for controlling the light-emitting unit to be lighted in each light-emitting unit, so as to reduce the area of an opaque area, increase the proportion of the area of a light-transmitting area in the whole area, and increase the light transmittance of the area. However, this approach may reduce the pixel density unit (PPI) of the region B (i.e., unlike the PPI of the region a), and the two regions may see a significant difference when displaying an image.

Another method is to use one active TFT device group to simultaneously control a plurality of light emitting cells in the region B, so that the plurality of light emitting cells are simultaneously lit, thereby reducing the number of gate lines and data in the region, increasing the ratio of the area of the light-transmitting region to the entire region, and increasing the light transmittance of the region. However, since the plurality of light emitting units are simultaneously turned on and have the same brightness, the plurality of light emitting units form a light emitting region with a larger area, so that the PPI of the region B is actually decreased, and the image quality is different from that of the region a.

The embodiment of the application provides a display panel and a display device, can light the pixel in the vice display area according to the chronogenesis in proper order to reduce the interior line quantity of walking of vice display area, thereby when guaranteeing vice display area transmissivity, promote the display effect in vice display area.

The following embodiments of the present application may be implemented individually, or in combination with each other, and the embodiments of the present application are not limited specifically.

The following describes a display panel, a display device and technical effects thereof.

Fig. 1 shows a schematic top view structure diagram of a display panel provided in an embodiment, and fig. 2 shows a schematic cross-sectional structure diagram of a display panel provided in an embodiment. As shown in fig. 1 and fig. 2, the display panel is used to implement a display function, and in the embodiment provided in the present application, the display panel includes a main display area 10 and a sub display area 20, the main display area 10 surrounds the sub display area 20, and both the main display area 10 and the sub display area 20 have a display function. The number of the sub display regions 20 may be one or more (fig. 1 shows the number of the sub display regions 20 as one example). Alternatively, the main display area 10 may be a region with a relatively large area in the display panel, and the sub-display area 20 may be a region with a relatively small area in the display panel, that is, the area ratio of the main display area 10 in the display panel is larger than the area ratio of the sub-display area 20 in the display panel.

Referring to fig. 2, although the display panel is divided into the main display area 10 and the sub display area 20, the main display area 10 and the sub display area 20 are physically integrated, that is, the display panel is an integrated structure and is not divided into a plurality of independent components. For example, the main display area 10 and the sub display area 20 are formed on one substrate. The substrate may be made of a glass material, or may be made of a flexible material such as Polyimide (PI), which is not limited in this embodiment. The shading bubble cotton 30 is pasted to the one side that the light-emitting side was kept away from in main display area 10, and the shading bubble cotton 30 is not attached to the one side that the light-emitting side was kept away from in vice display area 20, is about to the shading bubble cotton 30 position that corresponds vice display area 20 hole, and the region of digging out can set up photosensitive element 50, and display panel's light-emitting side is pasted polarizer 40, and light can pass through polarizer 40 and vice display area 20 and then enters photosensitive element 50.

Fig. 3 illustrates a schematic diagram of a diffraction phenomenon provided by an embodiment. The interference phenomenon is a phenomenon in which two (or more) lines of waves having the same amplitude, frequency and initial phase are superimposed and synthesized to cause redistribution of the vibration intensity. The two beams of light satisfying the coherence condition are called coherent light, and the coherence condition is as follows: 1. the vibration directions are the same; 2. the vibration frequencies are the same; 3. the phases are the same or the phase difference remains constant. Since the actual physical light source is not a point source, always has a certain spatial dimension and comprises a plurality of radiation units, the emitted light is not strictly monochromatic light, and the spectrum of the emitted light has a certain width, namely, partially coherent light. Light can continue to propagate around obstacles, a phenomenon known as diffraction of light. For coherent light and partially coherent light, when a beam of light irradiates on two small holes, the two small holes diffract the light respectively, the distance between the centers of the small holes is the distance of the diffraction grating, and as shown in fig. 3, the maximum light intensity appears in the direction of the diffraction angle. When a plurality of small holes are distributed at a fixed distance in the transverse direction or the longitudinal direction, a small hole diffraction array is formed.

Fig. 4 is a schematic diagram illustrating that light spots occur in the display panel due to interference and diffraction phenomena during the imaging process according to an embodiment. In the incoherent light photographing occasion, namely in the natural light photographing occasion, a gauze or silk stockings material is covered in front of a lens of the camera, so that a photo photographed by the camera becomes hazy, and the photographing or photographing mode is often used for photographing a portrait, so that a soft atmosphere can be created. The array of light emitting units of the display panel, like a gauze or silk stockings, covers the front of the light sensing element 50, which may cause a hazy effect to the photographed picture, and thus the clarity of the photographed picture may be deteriorated. The haziness degree of the photo caused by the difference of the distances between the silk stockings and the lens of the camera is different, and the definition is higher when the silk stockings are closer to the lens of the camera.

Fig. 5 illustrates a trace schematic diagram of a display panel according to an embodiment. Fig. 6 is a schematic structural diagram of a sub-display area according to an embodiment. As shown in fig. 5 and 6, the first wire 100 and the second wire 200 of the main display area 10 may divide the main display area 10 into an array of light emitting units 300, and each light emitting unit 300 is a small hole capable of transmitting light. Because the light-shading foam 30 is attached to the surface, far away from the light emergent side, of the main display area 10, the main display area 10 cannot transmit light, namely, the performance of the display panel cannot be influenced; however, if the structure is applied to the sub-display area 20, since the light-shielding foam 30 is not attached to the surface of the sub-display area 20 away from the light-emitting side, the light-transmitting aperture array composed of many apertures will generate interference and diffraction phenomena during the imaging process.

Therefore, the display panel provided in the embodiment of the present application divides the sub-display area 20 into a plurality of sub-display areas 21 arranged in an array, and each sub-display area 21 includes N light emitting units 300 and one control unit 301. The control units 301 in the same row receive the first signal through a first trace 100 connected to the main display area 10, and the control units 301 in the same column receive the second signal through a second trace 200 connected to the main display area 10. In this way, the number of traces entering the sub display area 20 can be greatly reduced. For example, in the sub display area 20 shown in fig. 5, compared with the main display area 10, the density of the first routing lines and the second routing lines is reduced by half, so that the transmittance of the sub display area 20 is increased. Meanwhile, the area of the small hole formed between the first wire and the second wire in the auxiliary display area 20 is correspondingly increased, and the problem of light spots caused by interference and diffraction phenomena in the imaging process is solved.

With continued reference to fig. 6, for any sub-display area 21, the control unit 301 is electrically connected to the N light emitting units 300, respectively, the control unit 301 is configured to control the first signal and the second signal to be input to the N light emitting units 300 according to a preset sequence; n is an integer greater than or equal to 2.

The Active-matrix organic light-emitting diode (AMOLED) display technology uses a thin film transistor (tft) in combination with a capacitor to store a signal to control the brightness of a display panel. For the purpose of a certain current driving, each light emitting unit 300 needs at least two switching tubes and a storage capacitor. Fig. 7 shows a circuit diagram of a light emitting unit according to an embodiment. As shown in fig. 7, each light emitting unit 300 includes a first switching tube T1, a second switching tube T2, a storage capacitor Cs, and a light emitting diode D.

The gate of the first switch transistor T1 is connected to an output terminal of the control unit 301, and is configured to receive a first signal (i.e. equivalent to being connected to the gate line); the drain of the first switch tube T1 is connected to another output terminal of the control unit 301, for receiving the second signal (i.e. equivalent to being connected to the data line); the source electrode of the first switch tube T1 is connected with the grid electrode of the second switch tube T2; the drain electrode of the second switch tube T2 is connected with the input end of the light-emitting diode D, and the source electrode of the second switch tube T2 is connected with a power supply VDD; one end of the storage capacitor Cs is connected with a power supply VDD, and the other end of the storage capacitor Cs is connected with a grid electrode of the second switching tube T2; the output end of the light emitting diode D is grounded GND.

After the first switch tube T1 is turned on, the voltage of the second signal can reach the second switch tube T2, the voltage of the second signal controls the magnitude of the current passing through the second switch tube T2, and when the second switch tube T2 has the current to pass through, the light emitting diode D can be turned on.

In one embodiment, the first signal is a gate signal and the second signal is a data signal. That is, the first wire 100 is a gate line, and the second wire 200 is a data line.

When the main display area 10 displays a picture, the gate lines sequentially output high voltages from top to bottom, when the gate line of a certain row is the high voltage, the first switch tubes T1 of all the light emitting units 300 in the row are turned on, and at this time, the display chip (display IC) outputs voltage signals for the data lines of all the columns, and respectively controls the brightness of each column of the corresponding light emitting unit 300 on the same row where the first switch tubes T1 are turned on. Accordingly, in the sub-display area 20, when a screen is displayed, one row of gate lines controls the control unit 301 located in the same row, one column of data lines controls the control unit 301 located in the same column, and the control unit 301 controls the lighting of the N light emitting units 300 electrically connected to the control unit 301.

For example, in the sub-display area 21 shown in fig. 6, one control unit 301 may control 4 light emitting units 300 electrically connected to the control unit 301, that is, one gate line may input gate signals to two rows of light emitting units 300, and one data line may input data signals to two columns of light emitting units 300. The control unit 301 may be a shift register to control the 4 light emitting units 300 one by one, so as to sequentially light up the pixels in the sub-display area according to the time sequence.

Specifically, when the gate line outputs a high level, the high level is used as a start signal of the shift register, and the shift register sequentially outputs 4 high level signals, which are respectively provided to the first switching tubes T1 of the four light emitting units 300. When the shift register provides a high level signal for the first switch transistor T1 of the first light emitting unit 300, the corresponding data line provides the data voltage required by the first light emitting unit 300; when the shift register provides a high level signal to the first switch transistor T1 of the second light emitting unit 300, the corresponding data line provides the required data voltage to the second light emitting unit 300; and so on until all four light emitting units 300 are sequentially lit.

The preset sequence can be from top to bottom and from left to right; other set orders are also possible, and the embodiments of the present application do not specifically limit this order.

It is understood that, for the sub-display region 21 shown in fig. 6, the 4 light emitting cells 300 are divided into two pairs of light emitting cell groups, each pair of light emitting cell groups being centrosymmetric with respect to the control unit 301. Thus, the distance from the 4 light emitting units 300 to the control unit 301 can be minimized, which is convenient for wiring.

In an embodiment, the value of N may be set according to actual needs. For example, N takes an even number; or the value of N is m ² And m is an integer greater than or equal to 2. Fig. 8 shows a schematic structural diagram of another sub-display area provided in an embodiment, and as shown in fig. 8, each sub-display area 21 includes 6 light-emitting units 300 and one control unit 301. Fig. 9 shows a schematic structural diagram of another sub-display area provided in an embodiment, and as shown in fig. 9, each sub-display area 21 includes 16 light-emitting units 300 and a control unit 301.

The larger the value of N is, the smaller the number of the first wires and the second wires in the sub display area 20 is, the larger the transmittance of the sub display area 20 is, and the larger the difficulty in the structural layout between the corresponding light emitting unit 300 and the control unit 301 is; the smaller the value of N is, the larger the number of the first wires and the second wires in the sub-display area 20 is, the smaller the transmittance of the sub-display area 20 is, and the smaller the difficulty of the structural layout between the corresponding light emitting unit 300 and the control unit 301 is.

In an embodiment, the material of the first trace 100 and the second trace 200 includes at least one of indium tin oxide and indium zinc oxide. The transparent indium tin oxide and/or indium zinc oxide wiring can further improve the transmittance of the display panel and improve the display effect.

In one embodiment, the pixel density units of the main display area 10 and the sub display area 20 are equal to ensure that the main display area 10 and the sub display area 20 do not have a difference in image quality when displaying a picture.

The embodiment of the application provides a display panel, which comprises a main display area and an auxiliary display area, wherein the main display area surrounds the auxiliary display area; the auxiliary display area comprises a plurality of sub-display areas arranged in an array, and each sub-display area comprises N light-emitting units and a control unit; the control units in the same row receive first signals through a first wire connected with the main display area, and the control units in the same column receive second signals through a second wire connected with the main display area; for any sub-display area, the control unit is respectively and electrically connected with the N light-emitting units and is used for controlling the first signal and the second signal to be input into the N light-emitting units according to a preset sequence; n is an integer greater than or equal to 2. Dividing the sub-display area into a plurality of sub-display areas arranged in an array, each sub-display area including N light emitting units and a control unit; for any sub-display area, the control unit is respectively electrically connected with the N light-emitting units, and can control the first signal and the second signal to be input into the N light-emitting units according to a preset sequence, so that the purpose of sequentially lightening the pixels in the sub-display area according to a time sequence is achieved. Meanwhile, the first wiring and the second wiring are electrically connected with the control unit, and the control unit is respectively electrically connected with the N light-emitting units, so that the wiring number in the auxiliary display area can be reduced, and the display effect of the auxiliary display area is improved while the transmittance of the auxiliary display area is ensured.

An embodiment of the present application further provides a display device, and fig. 10 illustrates a schematic structural diagram of the display device provided in the embodiment. As shown in fig. 10, the display device 70 includes a display panel 71 provided in any of the embodiments of the present application.

The display device 70 may also include light sensing elements (such as a camera and sensor). The front camera and the sensor are correspondingly arranged below the auxiliary display area of the display panel 71, and external light can enter the photosensitive element through the auxiliary display area. Optionally, besides the front camera and the sensor, other devices, such as a gyroscope or an earphone, may be disposed below the secondary display area.

The display panel 71 may be any one of an Organic Light-Emitting Diode (OLED) display panel, an In-Plane Switching (IPS) display panel, a Twisted Nematic (TN) display panel, a Vertical Alignment (VA) display panel, electronic paper, a Quantum Dot Light Emitting (QLED) display panel, or a micro LED (micro Light Emitting Diode, μ LED) display panel, and the like, which is not particularly limited In the present application. The light emission pattern of the display panel 71 may be top emission, bottom emission, or double-sided emission.

The display device 70 provided by the embodiment of the application can be applied to intelligent wearable equipment (such as an intelligent bracelet and an intelligent watch), and can also be applied to equipment such as a smart phone, a tablet computer and a display.

The preferred embodiments of the present application have been described above with reference to the accompanying drawings, and the scope of the claims of the present application is not limited thereby. Any modifications, equivalents and improvements which may occur to those skilled in the art without departing from the scope and spirit of the present application are intended to be within the scope of the claims of the present application.

Claims

1. A display panel comprising a main display area and a sub display area, the main display area surrounding the sub display area; wherein, the first and the second end of the pipe are connected with each other,

the auxiliary display area comprises a plurality of sub-display areas arranged in an array, and each sub-display area comprises N light-emitting units and a control unit; the control units positioned in the same row receive first signals through a first wire connected with the main display area, and the control units positioned in the same column receive second signals through a second wire connected with the main display area;

for any sub-display area, the control unit is electrically connected with the N light-emitting units respectively, and the control unit is used for controlling the first signal and the second signal to be input into the N light-emitting units according to a preset sequence; n is an integer greater than or equal to 2.

2. The display panel according to claim 1, wherein the control unit is a shift register.

3. The display panel according to claim 1, wherein the first signal is a gate signal and the second signal is a data signal.

4. The display panel according to claim 1, wherein each of the light emitting units comprises a first switching tube, a second switching tube, a storage capacitor, and a light emitting diode; wherein the content of the first and second substances,

the grid electrode of the first switch tube is connected with one output end of the control unit and used for receiving the first signal; the drain electrode of the first switch tube is connected with the other output end of the control unit and used for receiving the second signal; the source electrode of the first switch tube is connected with the grid electrode of the second switch tube;

the drain electrode of the second switch tube is connected with the input end of the light-emitting diode, and the source electrode of the second switch tube is connected with a power supply;

one end of the storage capacitor is connected with the power supply, and the other end of the storage capacitor is connected with the grid electrode of the second switching tube; the output end of the light emitting diode is grounded.

5. The display panel according to claim 1, wherein N is an even number; or the value of N is m ² And m is an integer greater than or equal to 2.

6. The display panel according to claim 5, wherein if N is 4, the 4 light emitting cells are divided into two pairs of light emitting cell groups for each sub-display region, and each pair of light emitting cell groups is symmetric with respect to the control unit center.

7. The display panel according to any one of claims 1 to 6, wherein a material of the first wirings and the second wirings comprises at least one of indium tin oxide and indium zinc oxide.

8. The display panel according to any one of claims 1 to 6, wherein the main display region and the sub display region have a pixel density unit equal to each other.

9. A display device characterized by comprising the display panel according to any one of claims 1 to 8.

10. The display device according to claim 9, further comprising: and the photosensitive element is positioned below the auxiliary display area of the display panel, and external light penetrates through the auxiliary display area to enter the photosensitive element.