CN220105939U - Folding display panel and electronic device - Google Patents

Abstract

The utility model discloses a folding display panel and an electronic device, wherein the folding display panel is provided with a folding area, a main display area and an auxiliary display area which are positioned at two sides of the folding area; the folding display panel comprises a plurality of first pixel units and a plurality of second pixel units, wherein the first pixel units are positioned in the main display area, the first pixel units have a first pixel opening ratio, the second pixel units are positioned in the auxiliary display area, and the second pixel units have a second pixel opening ratio; the first pixel aperture ratio is larger than the second pixel aperture ratio, so that the problems of service life, color difference and the like of the main display area and the auxiliary display area caused by the difference of using frequencies of users in the prior art are solved.

Description

Folding display panel and electronic device

Technical Field

The present utility model relates to the field of battery technologies, and in particular, to a foldable display panel and an electronic device.

Background

Along with the continuous development of display technology, in order to meet different use demands, various display with different characteristics have been developed, the development trend of intellectualization, portability and flexibility is one of the main development directions of the current electronic device, and the most outstanding advantage of the flexible display technology compared with the traditional flat panel display technology is that the inherent concept of original two-dimensional display is broken through, the application field of the display technology is expanded to more portable electronic devices, and a user can fold or curl the electronic device with the flexible display panel according to the needs so as to reduce the size of the electronic device and improve the portability of the electronic device.

At present, in a foldable electronic device, under an unfolding state and a folding state, an area for a display interface in a display screen visible on the front of a user changes, specifically, when electronic equipment is in the folding state (used as a straight-panel mobile phone scene), the display screen is changed from a large screen to a small screen, which is equivalent to a screen shared by a main screen and a sub-screen, and when the electronic equipment is unfolded (used as a flat-panel scene), the display screen is used as a whole screen; from the long-term use of the foldable electronic device, half of the screens in the display screen are used as large screens, and the secondary screens are used as secondary screens, so that the frequency is obviously higher than that of the other half of the screens, and the problems of low service life, large chromatic aberration and the like on both sides of the screen are caused.

Disclosure of Invention

The embodiment of the utility model provides a folding display panel and an electronic device, which are used for solving or at least partially solving the problems of low screen life, large chromatic aberration and the like of the traditional foldable electronic device.

In order to achieve the above functions, the technical solution provided by the embodiment of the present utility model is as follows:

the embodiment of the utility model provides a folding display panel, which is provided with a folding area, a main display area and a secondary display area, wherein the main display area and the secondary display area are positioned at two sides of the folding area;

the folding display panel includes:

the first pixel units are positioned in the main display area and have a first pixel opening ratio;

a plurality of second pixel units, the second pixel units being located in the secondary display area, the second pixel units having a second pixel aperture ratio;

wherein the first pixel aperture ratio is greater than the second pixel aperture ratio.

In the folded display panel provided by the embodiment of the utility model, the folding area includes a plurality of third pixel units, the third pixel units have third pixel aperture ratios, and the third pixel aperture ratios gradually decrease in the direction that the main display area points to the auxiliary display area.

In the folded display panel provided by the embodiment of the utility model, the folding region comprises a first bending sub-region and a second bending sub-region, the first bending sub-region is positioned at one side of the folding region close to the main display region, and the second bending sub-region is positioned at one side of the folding region close to the auxiliary display region;

the third pixel aperture ratio of the third pixel unit in the first bending sub-region is equal to the first pixel aperture ratio of the first pixel unit in the main display region, and the third pixel aperture ratio of the third pixel unit in the second bending sub-region is equal to the second pixel aperture ratio of the second pixel unit in the auxiliary display region.

In the folded display panel provided by the embodiment of the utility model, the number of the first pixel units in the main display area is equal to the number of the second pixel units in the auxiliary display area in the same unit area; the number of the second pixel units in the auxiliary display area is equal to the number of the third pixel units in the folding area in the same unit area.

In the folded display panel provided by the embodiment of the utility model, the distance between the center points of the adjacent first pixel units is equal to the distance between the center points of the adjacent second pixel units; the distance between the center points of the adjacent second pixel units is equal to the distance between the center points of the adjacent third pixel units.

In the folded display panel provided by the embodiment of the utility model, the first pixel unit comprises a plurality of first sub-pixels, the second pixel unit comprises a plurality of second sub-pixels, and the third pixel unit comprises a plurality of third sub-pixels;

the first sub-pixel includes a first light emitting layer, the second sub-pixel includes a second light emitting layer, and the third sub-pixel includes a third light emitting layer;

the distance between the adjacent first light-emitting layers is equal to the distance between the adjacent second light-emitting layers, and the distance between the adjacent second light-emitting layers is equal to the distance between the adjacent third light-emitting layers.

In the folding display panel provided by the embodiment of the utility model, the folding display panel comprises a substrate and a pixel definition layer which are arranged in a stacked manner;

the pixel definition layer is provided with a plurality of first sub-pixel openings in the main display area, one first sub-pixel opening is arranged corresponding to one first sub-pixel, the pixel definition layer is provided with a plurality of second sub-pixel openings in the auxiliary display area, and one second sub-pixel opening is arranged corresponding to one second sub-pixel;

the color of the first sub-pixel is the same as that of the second sub-pixel, and the area of the first sub-pixel opening is larger than that of the second sub-pixel opening.

In the folded display panel provided by the embodiment of the utility model, the pixel defining layer is provided with a plurality of third sub-pixel openings in the folding region, one of the third sub-pixel openings is arranged corresponding to one of the third sub-pixels, and the areas of the plurality of third sub-pixel openings gradually decrease in the direction of the main display region pointing to the auxiliary display region.

In the folded display panel provided by the embodiment of the utility model, the folded display panel comprises a driving circuit positioned between the substrate and the light-emitting layer, wherein the driving circuit comprises a first sub-circuit for driving a first sub-pixel and a second sub-circuit for driving a second sub-pixel;

wherein the current passing through the first light emitting layer per unit time is smaller than the current passing through the second light emitting layer.

The utility model provides an electronic device which comprises the folding display panel.

The embodiment of the utility model has the beneficial effects that: the embodiment of the utility model discloses a folding display panel and electronic equipment, wherein the folding display panel is provided with a folding area, a main display area and an auxiliary display area which are positioned at two sides of the folding area; the folding display panel comprises a plurality of first pixel units and a plurality of second pixel units, wherein the first pixel units are positioned in the main display area, the first pixel units have a first pixel opening ratio, the second pixel units are positioned in the auxiliary display area, and the second pixel units have a second pixel opening ratio; according to the utility model, the first pixel aperture ratio is larger than the second pixel aperture ratio, so that the brightness of the main display area is increased, the problem of chromatic aberration of the folded display panel caused by brightness attenuation of the main display area is further solved, and the service lives of the folded display panel in each area are balanced.

Drawings

In order to more clearly illustrate the technical solutions of the present embodiments, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a folded display panel in a flattened state according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a folded display panel in a folded state according to an embodiment of the present utility model;

FIG. 3 is a first top view cross-section of a pixel defining opening in a folded display panel according to an embodiment of the present utility model;

FIG. 4 is a schematic cross-sectional view of a foldable display panel according to an embodiment of the present utility model;

FIG. 5 is a top view cross-section of a second embodiment of a pixel defining opening in a folded display panel;

fig. 6 is a schematic cross-sectional view of a second type of foldable display panel according to an embodiment of the present utility model.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The embodiment of the utility model provides a folding display panel and electronic equipment. The following will describe in detail. The following description of the embodiments is not intended to limit the preferred embodiments.

Referring to fig. 3 to 6, the present utility model provides a foldable display panel 2 and an electronic device, wherein the foldable display panel 2 has a foldable area 30, and a main display area 10 and a sub display area 20 located at two sides of the foldable area 30; the folded display panel 2 includes a plurality of first pixel units 21 and a plurality of second pixel units 22, the first pixel units 21 are located in the main display area 10, the first pixel units 21 have a first pixel aperture ratio, the second pixel units 22 are located in the auxiliary display area 20, and the second pixel units 22 have a second pixel aperture ratio, wherein the first pixel aperture ratio is greater than the second pixel aperture ratio.

It should be noted that please refer to fig. 1 and fig. 2; fig. 1 is a schematic structural view of a conventional folded display panel in a flattened state; FIG. 2 is a schematic view of a conventional foldable display panel in a folded state; in the existing folding display panel 1, in the unfolded state and the folded state, the area for displaying the interface in the display screen visible on the front of the user will change, specifically, in this embodiment, the use frequency of the display screen corresponding to the main display area 10 is greater than the use frequency of the display screen corresponding to the auxiliary display area 20, which is taken as an example to illustrate the prior art; wherein, when the existing folding display panel 1 is unfolded, as shown in fig. 1, the display portion of the existing folding display panel 1 includes a main display area 10, a folding area 30, and a sub display area 20; when the existing folding display panel 1 is in a folded state, as shown in fig. 2, the display portion of the existing folding display panel 1 includes only the main display area 10; therefore, from the long-term use of the existing folded display panel 1, the frequency of use of the display screen corresponding to the main display area 10 is greater than the frequency of use of the display screen corresponding to the auxiliary display area 20, so that the problems of low service life, large color difference and the like of the existing folded display panel 1 may be caused.

It can be understood that in the present utility model, a plurality of first pixel units are disposed in the main display area, the first pixel units have a first pixel aperture ratio, a plurality of second pixel units are disposed in the auxiliary display area, the second pixel units have a second pixel aperture ratio, and the first pixel aperture ratio is greater than the second pixel aperture ratio, so as to increase the brightness of the main display area, further compensate for the problem of color difference of the folded display panel caused by the brightness attenuation of the main display area, and balance the service life of the folded display panel in each area.

The technical scheme of the present utility model will now be described with reference to specific embodiments.

Example 1

Please refer to fig. 3 and fig. 4; FIG. 3 is a first top view cross-section of a pixel defining opening in a foldable display panel according to an embodiment of the present utility model; fig. 4 is a first schematic cross-sectional view of a foldable display panel according to an embodiment of the utility model.

The present embodiment provides a folded display panel 2, the folded display panel 2 has a folding area 30, and a main display area 10 and a sub display area 20 located at two sides of the folding area 30, wherein the main display area 10 and the sub display area 20 are non-folding areas at two sides in a width direction of the folded display panel 2.

In this embodiment, the folded display panel 2 includes a plurality of first pixel units 21 and a plurality of second pixel units 22, where the first pixel units 21 are located in the main display area 10, the first pixel units 21 have a first pixel aperture ratio, the second pixel units 22 are located in the auxiliary display area 20, and the second pixel units 22 have a second pixel aperture ratio, and the first pixel aperture ratio is greater than the second pixel aperture ratio.

In this embodiment, the first pixel unit 21 includes a first pixel opening, the first pixel opening ratio is a ratio of an area of the first pixel opening to an area of the first pixel unit 21, and the second pixel unit 22 includes a second pixel opening, and the second pixel opening ratio is a ratio of an area of the second pixel opening to an area of the second pixel unit 22.

It can be appreciated that, in the existing folded display panel 1, the use frequency of the display screen corresponding to the main display area 10 is greater than the use frequency of the display screen corresponding to the auxiliary display area 20, so that the problem of luminance attenuation occurs in the main display area 10 in the existing folded display panel 1, and the luminance of the main display area 10 is increased by setting the first pixel aperture ratio to be greater than the second pixel aperture ratio, so that the problem of color difference occurring in the folded display panel 2 due to the luminance attenuation of the main display area 10 is compensated, and the service life of the folded display panel 2 in each area is balanced.

Further, in the present embodiment, the folded display panel 2 further includes a plurality of third pixel units 23, the third pixel units 23 are located in the folded region 30, and the third pixel units 23 have a third pixel aperture ratio; wherein the third pixel aperture ratios of the plurality of third pixel units 23 gradually decrease in a direction in which the main display area 10 points to the sub display area 20; wherein the third pixel unit 23 includes a third pixel opening, and the third pixel opening ratio is a ratio of an area of the third pixel opening to an area of the third pixel unit 23.

It can be understood that in the present embodiment, the third pixel aperture ratios of the plurality of third pixel units 23 gradually decrease in the direction in which the main display area 10 points to the auxiliary display area 20, so that the transition from the main display area 10 to the auxiliary display area 20 can be realized, and the light-emitting brightness of the main display area 10, the folding area 30, and the auxiliary display area 20 of the folding display panel 2 can be uniformly changed.

In this embodiment, the usage scenario and frequency of the user of the existing folding display panel 1 may be classified and counted by using big data, the frequency of the user unfolding and folding use may be counted, and the usage condition of the user in the whole life cycle of the folding display panel may be analyzed according to the usage data of the user in one day, one month, one year, etc., so as to calculate the service life of the folding display panel.

Then, the ratio of the first pixel aperture ratio, the second pixel aperture ratio and the third pixel aperture ratio can be calculated according to the data such as the brightness and the chromaticity of the product, the light-emitting life requirement, the light-emitting efficiency of the device and the like; the areas of the first pixel openings, the second pixel openings and the third pixel openings are designed according to the frequency of use of the main display area 10, the frequency of use of the auxiliary display area 20 and the frequency of use of the folding area 30; therefore, the area of the first pixel opening, the area of the second pixel opening, and the area of the third pixel opening may be designed according to actual use conditions, which is not particularly limited in this embodiment.

Further, in the present embodiment, the number of the first pixel units 21 in the main display area 10 is equal to the number of the second pixel units 22 in the sub display area 20 in the same unit area; the number of the second pixel units 22 in the sub-display area 20 is equal to the number of the third pixel units 23 in the folding area 30 in the same unit area.

It can be understood that, in this embodiment, the first pixel aperture ratio is greater than the second pixel aperture ratio, and by setting the number of the first pixel units 21 in the main display area 10 and the number of the second pixel units 22 in the auxiliary display area 20 to be equal in the same unit area, the number of pixels in the main display area 10 is relatively increased, so that the display effect of the main display area 10 is improved, and the picture of the folded display panel 2 is more uniform.

Further, in the present embodiment, the pitch between the center points of the adjacent first pixel units 21 is equal to the pitch between the center points of the adjacent second pixel units 22; the distance between the center points of the second pixel units 22 and the distance between the center points of the third pixel units 23 are equal, so that the arrangement structure of the first pixel units 21 in the main display area 10 and the arrangement structure of the second pixel units 22 in the auxiliary display area 20 are kept consistent, the display effect of the main display area 10 and the auxiliary display area 20 is kept the same, and the display difference between the main display area 10 and the auxiliary display area 20 is reduced.

Further, in the present embodiment, the first pixel unit 21 includes a plurality of first sub-pixels 21A, the second pixel unit 22 includes a plurality of second sub-pixels 22A, the third pixel unit 23 includes a plurality of third sub-pixels 23A, and the light emitting layer 14 includes a plurality of first light emitting layers 141, a plurality of second light emitting layers 142, and a plurality of third light emitting layers 143; the first sub-pixel 21A includes the first light emitting layer 141 located within the first sub-pixel opening 121, the second sub-pixel 22A includes the second light emitting layer 142 located within the second sub-pixel opening 122, and the third sub-pixel 23A includes the third light emitting layer 143 located within the third sub-pixel 23A opening 123; wherein, the pitch of the adjacent first light emitting layer 141 is equal to the pitch of the adjacent second light emitting layer 142, and the pitch of the adjacent second light emitting layer 142 is equal to the pitch of the adjacent third light emitting layer 143.

Specifically, in the present embodiment, the folding display panel 2 includes a substrate 11, and a first electrode layer 13, a pixel defining layer 12, a light emitting layer 14, and a second electrode layer 15 that are stacked on the substrate 11; the pixel defining layer 12 is provided with a plurality of first sub-pixel openings 121 in the main display area 10, one of the first sub-pixel openings 121 is corresponding to one of the first sub-pixels 21A, the pixel defining layer 12 is provided with a plurality of second sub-pixel openings 122 in the auxiliary display area 20, one of the second sub-pixel openings 122 is corresponding to one of the second sub-pixels 22A, the pixel defining layer 12 is provided with a plurality of third sub-pixel openings 123 in the folding area 30, one of the third sub-pixel openings 123 is corresponding to one of the third sub-pixels 23A, wherein the color of the first sub-pixel 21A is the same as the color of the second sub-pixel 22A and the color of the third sub-pixel 23A, and the area of the first sub-pixel openings is larger than the area of the second sub-pixel openings; further, the areas of the plurality of third sub-pixel openings 123 gradually decrease in the direction in which the main display area 10 points to the sub-display area 20.

Note that, in the present embodiment, the color of the first sub-pixel 21A includes, but is not limited to, one of blue, red, and yellow, the color of the second sub-pixel 22A includes, but is not limited to, one of blue, red, and yellow, and the color of the third sub-pixel 23A includes, but is not limited to, one of blue, red, and yellow, and the shape of the first sub-pixel 21A, the color of the first sub-pixel 21A, the number of the first sub-pixels 21A, the shape of the second sub-pixel 22A, the color of the second sub-pixel 22A, the number of the second sub-pixels 22A, the shape of the third sub-pixel 23A, the color of the third sub-pixel 23A, and the number of the third sub-pixels 23A are not particularly limited.

Further, in the present embodiment, the folded display panel 2 further includes a driving circuit between the substrate 11 and the first electrode layer 13, the driving circuit including a first sub-circuit for driving the first sub-pixel 21A and a second sub-circuit for driving the second sub-pixel 22A; wherein the current passing through the first light emitting layer 141 per unit time is smaller than the current passing through the second light emitting layer 142; it will be appreciated that since the lifetime of the light-emitting layer 14 is related to the current density through the light-emitting layer 14, the greater the current density, the more susceptible the light-emitting layer 14 to degradation, and the faster the luminance of the light-emitting layer 14 decays; conversely, the light-emitting layer 14 is less prone to aging as the current density is smaller, and the luminance of the light-emitting layer 14 is less degraded, so that the embodiment is beneficial to improving the light-emitting life of the first light-emitting layer 141 by setting the current passing through the first light-emitting layer 141 to be smaller than the current passing through the second light-emitting layer 142 in a unit time.

Example two

Please refer to fig. 5 and 6; FIG. 5 is a top view of a second embodiment of a pixel defining opening in a foldable display panel; fig. 6 is a schematic cross-sectional view of a second type of foldable display panel according to an embodiment of the present utility model.

In this embodiment, the structure of the folded display panel is similar to/the structure of the folded display panel provided in the above embodiment, and please refer to the description of the folded display panel in the above embodiment, which is not repeated herein, and the difference between the two is that:

in this embodiment, the folding area 30 includes a first folding sub-area 31 and a second folding sub-area 32, the first folding sub-area 31 is located at a side of the folding area 30 near the main display area 10, and the second folding sub-area 32 is located at a side of the folding area 30 near the auxiliary display area 20; the third pixel aperture ratio of the third pixel unit 23 in the first inflection sub-region 31 is equal to the first pixel aperture ratio of the first pixel unit 21 in the main display region 10, and the third pixel aperture ratio of the third pixel unit 23 in the second inflection sub-region 32 is equal to the second pixel aperture ratio of the second pixel unit 22 in the main display region 10.

Specifically, the first inflection sub-region 31 is disposed adjacent to the main display region 10, in this embodiment, by disposing that the third pixel aperture ratio of the third pixel unit 23 in the first inflection sub-region 31 is equal to the first pixel aperture ratio of the first pixel unit 21 in the main display region 10, the pixel aperture ratio in the first inflection sub-region 31 is identical to the pixel aperture ratio in the main display region 10, the third pixel aperture ratio of the third pixel unit 23 in the second inflection sub-region 32 is equal to the second pixel aperture ratio of the second pixel unit 22 in the main display region 10, so that the pixel aperture ratio in the second inflection sub-region 32 is identical to the pixel aperture ratio in the auxiliary display region 20, and by gradually disposing the pixel aperture ratio in the folding region 30, the pixel aperture ratio of the pixel unit in the display panel 2 is gradually changed from the first pixel aperture ratio of the main display region 10 to the second pixel aperture ratio of the auxiliary display region 20, thereby improving the uniformity of the luminance of the display panel 2.

The embodiment also provides an electronic device, which comprises the folding display panel according to any one of the embodiments.

The folding display panel has been described in detail in the above embodiments, and the description thereof will not be repeated.

When the electronic device is specifically applied, the electronic device can be a display screen of equipment such as a smart phone, a tablet personal computer, a notebook computer, a smart bracelet, a smart watch, smart glasses, a smart helmet, a desktop computer, a smart television or a digital camera, and even can be applied to electronic equipment with a flexible display screen.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

The above description of the embodiment of the present utility model provides a foldable display panel and an electronic device, and specific examples are applied to describe the principles and embodiments of the present utility model, where the description of the above embodiment is only for helping to understand the method and core idea of the present utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present utility model, the present description should not be construed as limiting the present utility model.

Claims (10)

1. The folding display panel is characterized by comprising a folding area, a main display area and a secondary display area which are positioned at two sides of the folding area;

the folding display panel includes:

the first pixel units are positioned in the main display area and have a first pixel opening ratio;

a plurality of second pixel units, the second pixel units being located in the secondary display area, the second pixel units having a second pixel aperture ratio;

wherein the first pixel aperture ratio is greater than the second pixel aperture ratio.

2. The folded display panel of claim 1, wherein the folding region includes a plurality of third pixel units having third pixel aperture ratios that gradually decrease in a direction in which the main display region points to the sub display region.

3. The folded display panel of claim 2, wherein the fold region comprises a first fold sub-region and a second fold sub-region, the first fold sub-region being located on a side of the fold region proximate to the primary display region and the second fold sub-region being located on a side of the fold region proximate to the secondary display region;

the third pixel aperture ratio of the third pixel unit in the first bending sub-region is equal to the first pixel aperture ratio of the first pixel unit in the main display region, and the third pixel aperture ratio of the third pixel unit in the second bending sub-region is equal to the second pixel aperture ratio of the second pixel unit in the auxiliary display region.

4. The folding display panel according to claim 2, wherein the number of the first pixel units in the main display area is equal to the number of the second pixel units in the sub display area in the same unit area; the number of the second pixel units in the auxiliary display area is equal to the number of the third pixel units in the folding area in the same unit area.

5. The folded display panel of claim 4, wherein a pitch between center points of adjacent first pixel units is equal to a pitch between center points of adjacent second pixel units; the distance between the center points of the adjacent second pixel units is equal to the distance between the center points of the adjacent third pixel units.

6. The folded display panel of claim 5, wherein the first pixel unit includes a plurality of first sub-pixels, the second pixel unit includes a plurality of second sub-pixels, and the third pixel unit includes a plurality of third sub-pixels;

the first sub-pixel includes a first light emitting layer, the second sub-pixel includes a second light emitting layer, and the third sub-pixel includes a third light emitting layer;

the distance between the adjacent first light-emitting layers is equal to the distance between the adjacent second light-emitting layers, and the distance between the adjacent second light-emitting layers is equal to the distance between the adjacent third light-emitting layers.

7. The folded display panel of claim 6, wherein the folded display panel comprises a substrate and a pixel defining layer arranged in a stack;

the pixel definition layer is provided with a plurality of first sub-pixel openings in the main display area, one first sub-pixel opening is arranged corresponding to one first sub-pixel, the pixel definition layer is provided with a plurality of second sub-pixel openings in the auxiliary display area, and one second sub-pixel opening is arranged corresponding to one second sub-pixel;

the color of the first sub-pixel is the same as that of the second sub-pixel, and the area of the first sub-pixel opening is larger than that of the second sub-pixel opening.

8. The foldable display panel of claim 7, wherein the pixel defining layer has a plurality of third sub-pixel openings formed in the folding region, one of the third sub-pixel openings being disposed corresponding to one of the third sub-pixels, and the areas of the plurality of third sub-pixel openings gradually decreasing in a direction in which the main display region is directed toward the sub-display region.

9. The folded display panel of claim 8, comprising a drive circuit between the substrate and the light emitting layer, the drive circuit comprising a first sub-circuit for driving a first sub-pixel and a second sub-circuit for driving a second sub-pixel;

wherein the current passing through the first light emitting layer per unit time is smaller than the current passing through the second light emitting layer.

10. An electronic device comprising a folded display panel according to any one of claims 1 to 9.