Patent ID: 12256624

DETAILED DESCRIPTION OF EMBODIMENTS

The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present disclosure, but are not all embodiments of the present disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts are within the scope of the present application. Besides, it should be understood that the specific embodiments described herein are merely for describing and explaining the present application and are not intended to limit the present application. In the present application, unless opposite stated, the orientation words used such as “upper” and “lower” generally refer to the upper and lower directions of the device in actual using or working state, and specifically refer to the drawing directions in the drawings, and “inner” and “outer” refer to the outline of the device.

Embodiments of the present application provide a display panel and a manufacturing method thereof. The details are described below respectively. It should be noted that a description order of the following embodiments is not intended to limit a preferred order of the embodiments.

Please refer toFIG.1, one embodiment of the present application provides a display panel, including a display region111and a non-display region112. The non-display region112is located on a side of the display region111. In one embodiment of the present application, the non-display region112is disposed on a peripheral side of the display region111, i.e., the non-display region112is disposed around the display region111. Of course, the non-display region112can be disposed only on one side of the display region111according to an actual selection and specific requirements, which is not limited herein.

The display panel includes a first substrate110, a driving circuit layer120, and a light-emitting device layer130. The driving circuit layer120is disposed on a side of the first substrate110. The light-emitting device layer130is disposed on a side of the driving circuit layer120away from the first substrate110. In this embodiment, the light-emitting device layer130is electrically connected to the driving circuit layer120. The driving circuit layer120energizes the light-emitting device layer130, thereby driving the light-emitting device layer130to emit light.

The display panel includes a second substrate210and a stress releasing layer231. The second substrate210is disposed opposite to the first substrate110. The driving circuit layer120and the light-emitting device layer130are disposed between the first substrate110and the second substrate210. The stress releasing layer231is disposed on a side of the second substrate210close to the first substrate110. The stress releasing layer231is disposed corresponding to the non-display region112. A concave section233is disposed in the stress releasing layer231.

In the display panel of one embodiment of the present application, by disposing the stress releasing layer231having the concave section233at the position of the second substrate210corresponding to the non-display region112, when the display panel is bent, the concave section223can serve an effect of releasing stress to prevent film layers in the non-display region112from being fractured when a bending radius is small. Water vapor and oxygen entering the display region111from a fragmentation position of the non-display region112can be prevented, which can improve reliability of the display panel and reduce failure risk of the display panel.

Specifically, as illustrated inFIG.1andFIG.2, the concave section223includes a plurality of first grooves234extending along the first direction X. The plurality of first grooves234are arranged along a second direction Y. The first direction X intersects with the second direction Y. The stress releasing layer231includes a plurality of color resist blocks232. The plurality of color resist blocks232are spaced apart. The first grooves234are defined between two adjacent color resist blocks232arranged along the second direction Y. In this structure, when the display panel is bent along the second direction Y, the concave section234can serve an effect of releasing stress to prevent film layers in the non-display region112from being fractured, which effectively prevents water vapor and oxygen from entering the display region111from a fragmentation position of the non-display region112to improve reliability of the display panel and to reduce failure risk of the display panel. In one embodiment of the present application, the first direction X and the second direction Y are perpendicular. Of course, the first direction X and the second direction Y can also configured to intersect at other angles according to an actual selection and specific requirements, which is not limited herein.

Specifically, a width of the first grooves234is gradually expanded from a direction of the second substrate210toward the first substrate110. In this structure, when a bending radius of the display panel is relative small, the concave section234can provide sufficient space conducive moving of the color resist blocks232. The concave section234can release stress better, thereby preventing film layers in the non-display region112from being fractured, which effectively prevents water vapor and oxygen from entering the display region111from the fragmentation position of the non-display region112to improve reliability of the display panel and to reduce failure risk of the display panel.

Specifically, as illustrated inFIG.1andFIG.3, the concave section223further includes a plurality of second grooves235extending along the second direction X. The plurality of second grooves235are arranged along the first direction X. The first grooves234communicate with the second grooves235. The second grooves235are defined between two adjacent color resist blocks232arranged along the first direction X. In this structure, when the display panel is bent along the first direction X, the second grooves235can serve an effect of releasing stress to prevent film layers in the non-display region112from being fractured, which effectively prevents water vapor and oxygen from entering the display region111from a fragmentation position of the non-display region112to improve reliability of the display panel and to reduce failure risk of the display panel. In this embodiment, the plurality of color resist blocks232are distributed in an array manner along the first direction X and the second direction Y. Of course, the plurality of color resist blocks232can be distributed according to other manner according to an actual selection and specific requirements, which is not limited herein.

Specifically, a width of the second grooves235is gradually expanded from the direction of the second substrate210toward the first substrate110. In this structure, when a bending radius of the display panel is relative small, the second grooves235can provide sufficient space conducive moving of the color resist blocks232. The second grooves235can release stress better, thereby preventing film layers in the non-display region112from being fractured, which effectively prevents water vapor and oxygen from entering the display region111from the fragmentation position of the non-display region112to improve reliability of the display panel and to reduce failure risk of the display panel.

Specifically, as illustrated inFIG.1,FIG.4, andFIG.5, the concave section233further includes via holes236defined in the color resists232. In this structure, the via holes236can improve deformation ability of the color resist blocks232and greatly improve flexibility of the display panel, thereby preventing the film layers in the non-display region112from being fractured, which effectively prevents water vapor and oxygen from entering the display region111from a fragmentation position of the non-display region112to improve reliability of the display panel and to reduce failure risk of the display panel.

Specifically, a cross-sectional area of the via holes236is gradually expanded from a direction of the second substrate210toward the first substrate110. In this structure, when a bending radius of the display panel is relative small, the via holes236can provide sufficient space conducive moving of the color resist blocks232. The via holes236can release stress better, thereby preventing film layers in the non-display region112from being fractured, which effectively prevents water vapor and oxygen from entering the display region111from the fragmentation position of the non-display region112to improve reliability of the display panel and to reduce failure risk of the display panel.

Specifically, as illustrated inFIG.4andFIG.5, a cross-sectional shape of the via holes236can be circular. Of course, the cross-sectional shape of the via holes236can also be other shapes according to an actual selection and specific requirements, for example, the cross-sectional shape of the via holes236can be oval or polygonal, which is not limited herein.

Specifically, as illustrated inFIG.1, the display panel further includes a light filter layer230. The light shielding layer230is disposed on a side of the second substrate210close to the light-emitting device layer130. The light filter layer230is disposed corresponding to the display region111. The color filter layer230includes the red color resist237, the green color resist238, and the blue color resist239.

Specifically, as illustrated inFIG.1, the color resist blocks232are a stacked structure selected from one or at least two consisting of the red color resist237, the green color resist238, and the blue color resist239. In this structure, when the color resist blocks232include the red color resist237, the red color resist237of the color resist blocks232and the red color resist237of the display region111can be formed simultaneously; when the color resist blocks232include the green color resist238, the green color resist238of the color resist blocks232and the green color resist238of the display region111can be formed simultaneously; and when the color resist blocks232include the blue color resist239, the blue color resist239of the color resist blocks232and the blue color resist239of the display region111can be formed simultaneously. There is no need to increase masks and processes for manufacturing the color resist blocks232, this process is simple, flexible, and adjustable.

As illustrated inFIG.1, in the display panel of one embodiment of the present application, the color resist blocks232are a stacked structure of the red color resist237and the green color resist238. Of course, the color resist blocks232can only include one kind of color resists according to an actual selection and specific requirements. For example, the color resist blocks232can be the red color resist237, the green color resist238, or the blue color resist239. The color resist blocks232can include two kind of color resists, for example, the color resist blocks232can be a stacked structure including the red color resist237and the blue color resist239; or the color resist blocks232can be a stacked structure including the green color resist238and the blue color resist239; or the color resist blocks232can be a stacked structure including the red color resist237and the green color resist238. The color resist blocks232can include three kind of color resists, for example, the color resist blocks232can be a stacked structure including the red color resist237, the green color resist238, and the blue color resist239, which are not limited herein.

Specifically, as illustrated inFIG.6, heights of two adjacent color resist blocks232are different. In this structure, when the display panel is bent, adjacent color resist blocks232cannot interfere and squeeze each other, thereby preventing film layers in the non-display region112from being fractured, which effectively prevents water vapor and oxygen from entering the display region111from a fragmentation position of the non-display region112to improve reliability of the display panel and to reduce failure risk of the display panel.

As illustrated inFIG.6, in the display panel of one embodiment of the present application, between two adjacent color resist blocks232, one of the color resist blocks232includes the red color resist237, and another color resist block232includes the red color resist237and the green color resist238. In the present application, a height difference between two adjacent color resist blocks232is adjusted by adjusting a number of color resist layers. For example, between two adjacent color resist blocks232, one of the color resist blocks232is one of the red color resist237, the green color resist238, or the blue color resist239, and another color resist block232is a stacked structure including two or three of the red color resist237, the green color resist238, or the blue color resist239; or between the two adjacent color resist blocks232, one of the color resist blocks232is a stacked structure including two of the red color resist237, the green color resist238, or the blue color resist239; and another color resist block232is a stacked structure including the red color resist237, the green color resist238, and the blue color resist239.

Specifically, as illustrated inFIG.1,FIG.6andFIG.7, the display panel further includes an encapsulation layer140covering the light-emitting device layer130. The encapsulation layer140is located on a side of the color filter layer230close to the light-emitting device layer130. A thickness of the non-display region112of the first substrate110is less than a thickness of the display region111of the first substrate110. In this structure, by making the thickness of the non-display region112of the first substrate110to be thinner than the thickness of the display region111of the first substrate110, a part of the encapsulation layer140corresponding to the non-display region112can be adjusted to the neutral plane of the display panel, which increases the bending radius of the encapsulation layer140and prevents an fragmentation situation of the encapsulation layer140from occurring when the display panel is bent. In this embodiment, by adding stress releasing layer231in the non-display region112, the part of the encapsulation layer140corresponding to the non-display region112can be adjusted to the neutral plane of the display panel, which increases the bending radius of the encapsulation layer140and prevents an fragmentation situation of the encapsulation layer140from occurring when the display panel is bent.

Specifically, the encapsulation layer140includes a first inorganic layer141, an organic layer142, and a second inorganic layer143. The first inorganic layer141covers on a side of the light-emitting device layer130away from the driving circuit layer120. The organic layer142covers a side of the first inorganic layer141away from the light-emitting device layer130. The second inorganic layer143covers a side of the organic layer142away from the first inorganic layer141. Therefore, water vapor and oxygen eroding the light-emitting device layer130and the driving circuit layer120is prevented, reliability of the display panel is improved, and failure risk of the display panel is reduced.

Specifically, as illustrated inFIG.1,FIG.6, andFIG.7, in the display panel of one embodiment of the present application, the display panel further includes a light shielding layer220. The light shielding layer220can be but is not limited to black matrices. The light shielding layer220is disposed on a side of the second substrate210close to the light-emitting device layer130. The light shielding layer220is disposed corresponding to the display region111and the non-display region112. A plurality of accommodating grooves221are defined corresponding to the display region111in the light shielding layer220. The accommodating grooves221are defined to penetrate the light shielding layer220. The red color resist237, the green color resist238, and the blue color resist239of the display region111are disposed in corresponding accommodating grooves221. The stress releasing layer231(color resist blocks232) are disposed on a side of the light shielding layer220close to the light-emitting device layer130.

Specifically, as illustrated inFIG.1,FIG.6andFIG.7, the driving circuit layer120includes a buffer layer127, an active layer121disposed on a side of the buffer layer127facing away from the first substrate110, a gate insulation layer122disposed on a side of the active layer121facing away from the first substrate110, a gate electrode layer123disposed on a side of the gate insulation layer122facing away from the active layer121, a first insulation layer124covering on the gate electrode and the active layer121, a source-drain electrode metal layer125disposed on the first insulation layer124; and a second insulation layer126disposed on the source-drain electrode metal layer125and the first insulation layer124. A thickness of a section of the first insulation layer124corresponding to the non-display region112is less than a thickness of a section of the first insulation layer124corresponding to the display region111. In this structure, by making the thickness of the first insulation layer124corresponding to the non-display region112to be thinner than the thickness of the first insulation layer124corresponding to the display region111, a part of the encapsulation layer140corresponding to the non-display region112can be adjusted to the neutral plane of the display panel, which increases the bending radius of the encapsulation layer140and prevents an fragmentation situation of the encapsulation layer140from occurring when the display panel is bent.

Specifically, as illustrated inFIG.1,FIG.6andFIG.7, the light-emitting device layer130includes a plurality of organic light emitting diode (OLED) device131disposed in the display region111. The plurality of OLED devices131are distributed in an array manner. Each OLED device131corresponds to one of the red color resist237, the green color resist238, and the blue color resist239in the display region111. In this embodiment, the OLED devices131include an anode132disposed on the second insulation layer126, a light-emitting functional layer disposed on the anode132, and a cathode disposed on the light-emitting functional layer. The anode132is electrically connected to the source-drain electrode metal layer125, and the OLED devices131are energized by the driving circuit layer120through the source-drain electrode metal layer125, allowing a voltage difference to be between the anode132and the cathode, thereby driving the light-emitting functional layer of the OLED devices131to emit light.

Specifically, the light-emitting functional layer132includes a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, and an electron injection layer stacked in a direction from the anode132to the cathode. When the voltage difference is between the anode132and the cathode, electron holes pass through the hole injection layer and the hole transport layer in turn to reach the light-emitting layer, and ions pass through the electron injection layer and the electron transport layer in turn to reach the light-emitting layer. The electron holes combine with the electrons in the light-emitting layer. The energy generated by the combination causes outermost electrons of a material to be excited, and the electrons cross over to an outer atomic orbital. As it is only excitation, the outermost atomic orbital is unstable, and the outermost electron can immediately return to an original orbit. In this way, excess energy can be released in a form of light, thereby realizing light emission.

Please refer toFIG.8and combine withFIGS.1to7, one embodiment of the present application further provides a manufacturing method of the aforesaid display panel. The display panel includes a display region111and a non-display region112. The non-display region112is located on a side of the display region111. In one embodiment of the present application, the non-display region112is disposed on a peripheral side of the display region111, i.e., the non-display region112is disposed around the display region111. Of course, the non-display region112can be disposed only on one side of the display region111according to an actual selection and specific requirements, which is not limited herein. The manufacturing method of the display panel includes following steps:

step B1: forming a driving circuit layer120and a light-emitting device layer130on a first substrate110, wherein the driving circuit layer120is disposed on a side of the first substrate110, and the light-emitting device layer130is disposed on a side of the driving circuit layer120away from the first substrate110;

step B2: forming a stress releasing layer231on a second substrate210, wherein the stress releasing layer231is disposed corresponding to the non-display region112, and a concave section233is disposed in the stress releasing layer231; and

step B3: fixing the second substrate210on a side of the first substrate110, wherein the driving circuit layer120, the light-emitting device layer130, and the stress releasing layer231are disposed between the first substrate110and the second substrate210. The second substrate210can be but is not limited to be fixed to the side of the first substrate110by a fixing adhesive300. In this embodiment, the order of the above step B1and step B2can be switched, which is not limited here.

In the embodiments of the present application, by disposing the stress releasing layer231having the concave section233at the position of the second substrate210corresponding to the non-display region112, when the display panel is bent, the concave section223can serve an effect of releasing stress to prevent the stress releasing layer231from being fractured when a bending radius is small. Water vapor and oxygen entering the display region111from a fragmentation position can be prevented, which can improve reliability of the display panel and reduce failure risk of the display panel.

Specifically, the aforesaid step B2includes:step B21: forming a light shielding layer220on the second substrate210, wherein the light shielding layer220is disposed corresponding to the display region111and the non-display region112, a plurality of accommodating grooves221are defined corresponding to the display region111in the light shielding layer220, and the accommodating grooves221are defined to penetrate the light shielding layer220; andstep B22: forming a color filter layer230and a stress releasing layer231on the second substrate210, wherein the light shielding layer230and the stress releasing layer231are disposed on a side of the light shielding layer220close to the light-emitting device layer130, the light filter layer230is disposed corresponding to the display region111, the stress releasing layer231is disposed corresponding to the non-display region112, the color filter layer230includes a red color resist237, a green color resist238, and a blue color resist239disposed in the display region111, and the red color resist237, the green color resist238, and the blue color resist239of the display region111are disposed in corresponding accommodating grooves221.

Specifically, in the aforesaid step B22, the stress releasing layer231includes a plurality of color resist blocks232, the plurality of color resist blocks232are spaced apart, and the color resist blocks232are a stacked structure selected from one or at least two consisting of the red color resist237, the green color resist238, and the blue color resist239. In this configuration, when the color resist blocks232include the red color resist237, the red color resist237of the color resist blocks232and the red color resist237of the display region111can be formed simultaneously; when the color resist blocks232include the green color resist238, the green color resist238of the color resist blocks232and the green color resist238of the display region111can be formed simultaneously; and when the color resist blocks232include the blue color resist239, the blue color resist239of the color resist blocks232and the blue color resist239of the display region111can be formed simultaneously. There is no need to increase masks and processes for manufacturing the color resist blocks232, this process is simple, flexible, and adjustable.

The display panel and the manufacturing method thereof provided by the embodiments of the present application are described in detail above. This article uses specific cases for describing the principles and the embodiments of the present application, and the description of the embodiments mentioned above is only for helping to understand the method and the core idea of the present application. Meanwhile, for hose skilled in the art, will have various changes in specific embodiments and application scopes according to the idea of the present application. In summary, the content of the specification should not be understood as limit to the present application.