CN110264878A - Foldable display panel and production method - Google Patents
Foldable display panel and production method Download PDFInfo
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- CN110264878A CN110264878A CN201910513520.5A CN201910513520A CN110264878A CN 110264878 A CN110264878 A CN 110264878A CN 201910513520 A CN201910513520 A CN 201910513520A CN 110264878 A CN110264878 A CN 110264878A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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Abstract
Present applicant proposes a kind of foldable display panel and preparation method thereof, which includes folding region；At least two pixel units and the alleviation stress members between adjacent two pixel units are provided in the folding region；The folding region includes the first bending section, the second bending section and third bending section；The alleviation stress members are different in the volume of first bending section, second bending section and the third bending section.The application reduces foldable display panel bending stress when folding, the foldable display panel is made to can be realized smaller bending angle by the way that the alleviation stress members are arranged between pixel unit two neighboring in folding region.
Description
Technical field
This application involves display field, in particular to a kind of foldable display panel and preparation method thereof.
Background technique
With the development of science and technology, great variety has occurred in the appearance of mobile electronic device, wherein flexible screen is unique with its
Characteristic and huge potentiality and be concerned.For flexible screen is compared to conventional screen, have flexibility by force and flexible spy
Point, can reduce the degree of equipment accidental injury, and robustness is much higher than other screens.
Existing flexible screen due to the metal layer and inorganic ply stress concentration in product, and is cracked in bending, and
Crackle can gradually extend to display area, lead to signal transmitting failure, and picture display is abnormal.
Summary of the invention
The application provides a kind of foldable display panel and preparation method thereof, is being bent with solving existing foldable flexible screen
Shi Yingli larger technical problem.
To solve the above problems, technical solution provided by the present application is as follows:
The application provides a kind of foldable display panel comprising folding region；
At least two pixel units and delaying between adjacent two pixel unit are provided in the folding region
Solve stress members；
The folding region includes the first bending section, the second bending section and third bending section；
The stress members of alleviating are in the body of first bending section, second bending section and the third bending section
Product is different.
In the foldable display panel of the application,
The folding region is provided with substrate and the tft layer on the substrate；
The tft layer includes at least two thin film transistor (TFT)s；
The corresponding pixel unit of one thin film transistor (TFT)；
The alleviation stress members are between adjacent two thin film transistor (TFT).
In the foldable display panel of the application, the tft layer include at least two signals contact via hole and
An at least groove；
Flexible material is filled in the groove, to form the alleviation stress members；
The groove is formed in etch process with signal contact via hole with along with.
In the foldable display panel of the application, the cross sectional shape of the groove includes rectangle, square, inverted trapezoidal
At least one of.
In the foldable display panel of the application,
When the radius of curvature of second bending section is curved less than the radius of curvature of first bending section and the third
When the radius of curvature of tune, the volume for alleviating stress members is greater than institute in first bending section in second bending section
The volume for alleviating stress members is stated, the volume for alleviating stress members is greater than the third bending section in second bending section
The interior volume for alleviating stress members.
In the foldable display panel of the application,
On first bending section to the direction of second bending section, the volume for alleviating stress members gradually increases
Add, on second bending section to the direction of the third bending section, the volume for alleviating stress members is gradually reduced.
In the foldable display panel of the application,
When the radius of curvature of second bending section is curved greater than the radius of curvature of first bending section and the third
When the radius of curvature of tune, the volume for alleviating stress members is less than institute in first bending section in second bending section
The volume for alleviating stress members is stated, the volume for alleviating stress members is less than the third bending section in second bending section
The interior volume for alleviating stress members.
In the foldable display panel of the application,
On first bending section to the direction of second bending section, the volume for alleviating stress members gradually subtracts
Small, on second bending section to the direction of the third bending section, the volume for alleviating stress members is gradually increased.
Radius of curvature, second bending section in the foldable display panel of the application, when first bending section
Radius of curvature and the third bending section radius of curvature it is equal when, first bending section, second bending section and
The volume of the alleviation stress members in the third bending section is equal.
The production method that the application also proposed a kind of foldable display panel comprising:
At least dielectric layers of covering signal lead are formed on the substrate；
An at least groove is formed on the insulating layer in the folding region of the foldable display panel using etch process；
Organic material is filled, in the groove to form alleviation stress members；
The folding region includes the first bending section, the second bending section and third bending section, and the alleviation stress members exist
The volume of first bending section, second bending section and the third bending section is different.
The utility model has the advantages that the application between pixel unit two neighboring in folding region by being arranged the alleviation stress structure
Part reduces foldable display panel bending stress when folding, can be realized the foldable display panel smaller
Bending angle.
Detailed description of the invention
It, below will be to embodiment or the prior art in order to illustrate more clearly of embodiment or technical solution in the prior art
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only some of invention
Embodiment for those of ordinary skill in the art without creative efforts, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is the first structure chart of the application foldable display panel；
Fig. 2 is the film layer figure of the application foldable display panel folding region；
Fig. 3 is the first plane structure chart of the application foldable display panel folding region；
Fig. 4 is second of plane structure chart of the application foldable display panel folding region；
Fig. 5 is the third plane structure chart of the application foldable display panel folding region；
Fig. 6 is the 4th kind of plane structure chart of the application foldable display panel folding region；
The step of Fig. 7 is the application foldable display panel production method is schemed；
Fig. 8 A~8D is the process sequence diagram of the application foldable display panel production method.
Specific embodiment
The explanation of following embodiment is referred to the additional illustration, the particular implementation that can be used to implement to illustrate the application
Example.The direction term that the application is previously mentioned, such as [on], [under], [preceding], [rear], [left side], [right side], [interior], [outer], [side]
Deng being only the direction with reference to annexed drawings.Therefore, the direction term used be to illustrate and understand the application, rather than to
Limit the application.The similar unit of structure is with being given the same reference numerals in the figure.
Referring to Fig. 1, Fig. 1 is the first structure chart of the application foldable display panel.
Present applicant proposes a kind of foldable display panel 100, the foldable display panel 100 includes 10 He of folding region
Non-collapsible district 20 positioned at 10 two sides of folding region.It is provided at least two pixel units in the folding region 10 and is located at
Alleviation stress members 30 between adjacent two pixel unit.
Referring to Fig. 2, Fig. 2 is the film layer figure of the application foldable display panel folding region.
Substrate 201 and the tft layer 40 on the substrate 201 are provided in the folding region 10.It is described thin
Film transistor layer 40 includes at least two thin film transistor (TFT)s 41.The corresponding pixel unit of one thin film transistor (TFT) 41.Institute
It states and alleviates stress members 30 between adjacent two thin film transistor (TFT) 41.
In the present embodiment, the substrate 201 can be flexible base board.The material of the flexible base board may include polyamides
Imines.
In the present embodiment, the corresponding pixel unit of a thin film transistor (TFT) 41.The alleviation in the application
Stress members 30 can be between adjacent two thin film transistor (TFT) 41.
The tft layer 40 can be 202 type of etch stop layer, back channel etch type or top-gate thin-film transistors
The structures such as 41 types, specific there is no limit.Such as the tft layer 40 of 41 type of top-gate thin-film transistors includes: barrier layer
202, buffer layer 203, active layer 204, the first gate insulation layer 205, the first metal layer 206, the second gate insulation layer 207, the second gold medal
Belong to layer 208, interlayer dielectric layer 209, third metal layer 210 and flatness layer 211.In the present embodiment, the first metal layer
206 and the second metal layer 208 may be collectively referred to as grid layer, first gate insulation layer 205 and second gate insulation layer
207 may be collectively referred to as gate insulation layer.
The barrier layer 202 is located on the substrate 201.
In the present embodiment, the material on the barrier layer 202 may include silica.
The buffer layer 203 is formed on the barrier layer 202, is mainly used for buffering the pressure between film layer matter structure,
And there can also be the oxygen that centainly blocks water.
In the present embodiment, the material of the buffer layer 203 include one of silicon nitride or silica or more than one
Composition.
The active layer 204 is formed on the buffer layer 203, and the active layer 204 includes the doping through ion doping
Area.
First gate insulation layer 205 is formed on the active layer 204.First gate insulation layer 205 has described
Active layer 204 covers, and first gate insulation layer 205 is mainly used for the active layer 204 and is located on the active layer 204
Metal layer isolation.
The first metal layer 206 is located on first gate insulation layer 205.
The first metal layer 206 is the grid of the display panel.The metal material of the grid can usually use
The group of above-mentioned several metal materials also can be used in one of metals such as molybdenum, aluminium, alumel, molybdenum and tungsten alloy, chromium or copper
Close object.
In the present embodiment, the material of the first metal layer 206 can be molybdenum.
Second gate insulation layer 207 is formed on the first metal layer 206.Second gate insulation layer 207 is mainly used for
The first metal layer 206 and second metal layer 208 are isolated.
In the present embodiment, the material of first gate insulation layer 205 and second gate insulation layer 207 can be nitridation
The inorganic material of other insulation such as silicon, silica or silicon oxynitride.
The second metal layer 208 is formed on second gate insulation layer 207.
In the present embodiment, the metal material of the second metal layer 208 can be with the metal of the first metal layer 206
Material is identical.
The interlayer dielectric layer 209 is formed in the second metal layer 208, and the interlayer dielectric layer 209 is by described
The covering of two metal layers 208, is mainly used for for the second metal layer 208 and third metal layer 210 being isolated.
In the present embodiment, the material of the interlayer dielectric layer 209 can be with first gate insulation layer 205 and described
Two gate insulation layers 207 are identical.
The third metal layer 210 is formed on the interlayer dielectric layer 209.
The third metal layer 210 is the source-drain electrode of the display panel.The metal material of the source-drain electrode can use
Above-mentioned several metals also can be used in one of metals such as molybdenum, aluminium, alumel, molybdenum and tungsten alloy, chromium, copper or titanium-aluminium alloy
The composition of material.
In the present embodiment, the third metal layer 210 contacts via hole 212 by signal and is electrically connected with the active layer 204
It connects.
In the present embodiment, the material of the third metal layer 210 can be titanium-aluminium alloy.
Flatness layer 211 is formed on the third metal layer 210, guarantees the planarization of the array substrate film layer structure.
The foldable display panel 100 further include light emitting device layer (not shown) on the flatness layer 211 and
Encapsulated layer (not shown).
Referring to Fig. 2, being additionally provided with an at least groove 213 in the folding region 10.Filling is flexible in the groove 213
Material, to form the alleviation stress members 30；
In the present embodiment, the groove 213 can contact via hole 212 in the shape in etch process with along with the signal
At.Using the first etch process formed signal contact via hole 212, recycle the second etch process adjacent films transistor 41 it
Between form the groove 213.
In the present embodiment, first etch process and second etch process can be dry etching or wet process
Etching.
In the present embodiment, signal contact through the interlayer dielectric layer 209, second gate insulation layer 207 and
Part first insulating layer, the groove 213 can through the interlayer dielectric layer 209, second gate insulation layer 207,
First insulating layer.
In the present embodiment, the groove 213 can also be etched to the barrier layer 202.
In the present embodiment, the cross sectional shape of the groove 213 may include rectangle, square, in inverted trapezoidal extremely
Few one kind.
It in the present embodiment, can be same with the formation flatness layer 211 the step of filling organic material in the groove 213
Shi Jinhang.
Referring to Fig. 1, the folding region 10 includes the first bending section 11, the second bending section 12 and third bending section 13.
In the present embodiment, the alleviation stress members 30 first bending section 11, second bending section 12 with
And the volume of the third bending section 13 is different.
The difference of volume can be determined according to the depth and 213 opening area of groove of the groove 213, for the ease of saying
Bright, the depth of groove 213 described herein is all the same, changes the groove to change the opening area of the groove 213
213 volume.
Referring to Fig. 3, Fig. 3 is the first plane structure chart of the application foldable display panel folding region.
From mechanical analysis it is found that when the radius of curvature of second bending section 12 is less than the song of first bending section 11
When the radius of curvature of rate radius and the third bending section 13, bending stress suffered by second bending section 12 is maximum,
I.e. described second bending section 12 is the region of the most easy fracture of the foldable display panel 100.
The bending stress of second bending section 12 is greater than the bending stress of first bending section 11, second bending
The bending stress of section 12 is greater than the bending stress of the third bending section 13.
The volume for alleviating stress members 30 is greater than described in first bending section 11 in second bending section 12
Alleviate the volume of stress members 30, it is curved to be greater than the third for the volume for alleviating stress members 30 in second bending section 12
The volume for alleviating stress members 30 in tune 13.
Referring to Fig. 4, Fig. 4 is second of plane structure chart of the application foldable display panel folding region.
On the basis of Fig. 3, on first bending section 11 to the direction of second bending section 12, the alleviation is answered
The volume of power component 30 gradually increases, on second bending section 12 to the direction of the third bending section 13, the alleviation
The volume of stress members 30 is gradually reduced.
In Fig. 3~Fig. 4, the corresponding stress members 30 of alleviating of biggish second bending section 12 of bending stress
Volume is larger, lesser first bending section 11 of bending stress and the corresponding alleviation stress structure of the third bending section 13
The small volume of part 30, the stress for avoiding the 10 theca interna structure of folding region are concentrated, and the foldable display surface is improved
The bending performance of plate 100.
Referring to Fig. 5, Fig. 5 is the third plane structure chart of the application foldable display panel folding region.
From mechanical analysis it is found that when the radius of curvature of second bending section 12 is greater than the song of first bending section 11
When the radius of curvature of rate radius and the third bending section 13, bending stress suffered by second bending section 12 is minimum,
I.e. described first bending section 11 and the third bending section 13 are the region of the most easy fracture of the foldable display panel 100.
The bending stress of second bending section 12 is less than the bending stress of first bending section 11, second bending
The bending stress of section 12 is less than the bending stress of the third bending section 13.
The volume for alleviating stress members 30 is less than described in first bending section 11 in second bending section 12
Alleviate the volume of stress members 30, it is curved to be less than the third for the volume for alleviating stress members 30 in second bending section 12
The volume for alleviating stress members 30 in tune 13.
Referring to Fig. 6, Fig. 6 is the 4th kind of plane structure chart of the application foldable display panel folding region.
On first bending section 11 to the direction of second bending section 12, the volume for alleviating stress members 30
It is gradually reduced, on second bending section 12 to the direction of the third bending section 13, the body for alleviating stress members 30
Product gradually increases.
In the foldable display panel 100 of the application, when the radius of curvature, described second curved of first bending section 11
When the radius of curvature of tune 12 and the equal radius of curvature of the third bending section 13, first bending section 11, described second
The volume of the alleviation stress members 30 in bending section 12 and the third bending section 13 is equal.
In Fig. 3~Fig. 4, biggish first bending section 11 of bending stress and the corresponding institute of the third bending section 13
State alleviate stress members 30 volume it is larger, the corresponding alleviation stress structure of lesser second bending section 12 of bending stress
The small volume of part 30, the stress for avoiding the 10 theca interna structure of folding region are concentrated, and the foldable display surface is improved
The bending performance of plate 100.
The application is different by the way that the alleviation stress members 30 are arranged between pixel unit two neighboring in folding region 10
The volume for being bent the alleviation stress members 30 in region is different, reduces the foldable display panel 100 bending when folding
Stress, the stress for avoiding each region are concentrated, and the foldable display panel 100 is made to can be realized smaller bending angle.
Referring to Fig. 7, Fig. 7 schemes the step of being the application foldable display panel production method.
Fig. 8 A~8D is please referred to, Fig. 8 A~8D is the process sequence diagram of the application foldable display panel production method.
The production method of the foldable display panel 100 includes:
S10, at least dielectric layers that covering signal lead is formed on substrate 201；
This step specifically includes: providing a substrate 201, active layer 204, gate insulation are sequentially formed on the substrate 201
Layer, grid layer and interlayer dielectric layer 209；
Fig. 8 A is please referred to, barrier layer 202, buffer layer 203, active layer 204, first are sequentially formed on the substrate 201
Gate insulation layer 205, the first metal layer 206, the second gate insulation layer 207, second metal layer 208, interlayer dielectric layer 209.Described
One metal layer 206 and the second metal layer 208 may be collectively referred to as grid layer, first gate insulation layer 205 and described second
Gate insulation layer 207 may be collectively referred to as gate insulation layer.
In the present embodiment, the substrate 201 can also be flexible base board.The material of the flexible base board may include gathering
Acid imide.
The barrier layer 202 is located on the substrate 201.
In the present embodiment, the material on the barrier layer 202 may include silica.
The buffer layer 203 is formed on the barrier layer 202, is mainly used for buffering the pressure between film layer matter structure,
And there can also be the oxygen that centainly blocks water.
In the present embodiment, the material of the buffer layer 203 include one of silicon nitride or silica or more than one
Composition.
The active layer 204 is formed on the buffer layer 203.
First gate insulation layer 205 is formed on the active layer 204.First gate insulation layer 205 has described
Active layer 204 covers, and first gate insulation layer 205 is mainly used for the active layer 204 and is located on the active layer 204
Metal layer isolation.
The first metal layer 206 is located on first gate insulation layer 205.
The first metal layer 206 is the grid of the display panel.The metal material of the grid can usually use
The group of above-mentioned several metal materials also can be used in one of metals such as molybdenum, aluminium, alumel, molybdenum and tungsten alloy, chromium or copper
Close object.
In the present embodiment, the metal material of the first metal layer 206 can be molybdenum.
Second gate insulation layer 207 is formed on the first metal layer 206.Second gate insulation layer 207 is mainly used for
The first metal layer 206 and second metal layer 208 are isolated.
In the present embodiment, the material of first gate insulation layer 205 and second gate insulation layer 207 can be nitridation
The inorganic material of other insulation such as silicon, silica or silicon oxynitride.
The second metal layer 208 is formed on second gate insulation layer 207.
In the present embodiment, the metal material of the second metal layer 208 can be with the metal of the first metal layer 206
Material is identical.
The interlayer dielectric layer 209 is formed in the second metal layer 208, and the interlayer dielectric layer 209 is by described
The covering of two metal layers 208, is mainly used for for the second metal layer 208 and third metal layer 210 being isolated.
In the present embodiment, the material of the interlayer dielectric layer 209 can be with first gate insulation layer 205 and described
Two gate insulation layers 207 are identical.
S20, it is formed at least on the insulating layer in the folding region 10 of the foldable display panel 100 using etch process
One groove 213；
Fig. 8 B is please referred to, signal is formed first with the first etch process herein and contacts via hole 212, recycles the second etching
Technique forms the groove 213 between adjacent films transistor 41.
In the present embodiment, first etch process and second etch process can be dry etching or wet process
Etching.
S30, organic material is filled in the groove 213, alleviates stress members 30 to be formed；
It is further comprised the steps of: before filling organic material in the groove 213
Source-drain electrode layer is formed on the interlayer dielectric layer 209.
Fig. 8 C is please referred to, the source-drain electrode is formed by third metal layer 210 by patterned process.
The metal material of the third metal layer 210 can use molybdenum, aluminium, alumel, molybdenum and tungsten alloy, chromium, copper or titanium
The composition of above-mentioned several metal materials also can be used in one of metals such as aluminium alloy.
In the present embodiment, the third metal layer 210 contacts via hole 212 and the active layer 204 by the signal
Electrical connection.
In the present embodiment, the metal material of the third metal layer 210 is titanium-aluminium alloy.
Fig. 8 D is please referred to, the organic material filled in the groove 213 can be identical as the flatness layer 211, that is, has
Machine material first fills the groove 213 and forms the alleviation stress members 30, and continues deposition and form the flatness layer 211.
In step S20, since the groove 213 is located at the folding region 10.And the region that the folding region 10 is different
The stress intensity being subject to is different, therefore the radius size that can be folded according to the folding region 10 forms different depth and opening is big
The groove 213 of the small groove 213 and different volumes size.
Referring to Fig. 1, the folding region 10 includes the first bending section 11, the second bending section 12 and third bending section 13.
The stress members 30 of alleviating are in the body of first bending section 11, second bending section 12 and the third bending section 13
Product is different.
For ease of description, the depth of groove 213 described herein is all the same, to change the opening of the groove 213
Area changes the volume of the groove 213.
Referring to Fig. 3, it is found that the radius of curvature when second bending section 12 is curved less than described first from mechanical analysis
When the radius of curvature of tune 11 and the radius of curvature of the third bending section 13, bending suffered by second bending section 12
Stress is maximum, i.e., described second bending section 12 is the region of the most easy fracture of the foldable display panel 100.
The bending stress of second bending section 12 is greater than the bending stress of first bending section 11, second bending
The bending stress of section 12 is greater than the bending stress of the third bending section 13.
The volume for alleviating stress members 30 is greater than described in first bending section 11 in second bending section 12
Alleviate the volume of stress members 30, it is curved to be greater than the third for the volume for alleviating stress members 30 in second bending section 12
The volume for alleviating stress members 30 in tune 13.
Referring to Fig. 4, on the basis of Fig. 3, on first bending section 11 to the direction of second bending section 12,
The volume for alleviating stress members 30 gradually increases, in second bending section 12 to the direction of the third bending section 13
On, the volume for alleviating stress members 30 is gradually reduced.
In Fig. 3~Fig. 4, the corresponding stress members 30 of alleviating of biggish second bending section 12 of bending stress
Volume is larger, lesser first bending section 11 of bending stress and the corresponding alleviation stress structure of the third bending section 13
The small volume of part 30, the stress for avoiding the 10 theca interna structure of folding region are concentrated, and the foldable display surface is improved
The bending performance of plate 100.
Referring to Fig. 5, it is found that the radius of curvature when second bending section 12 is curved greater than described first from mechanical analysis
When the radius of curvature of tune 11 and the radius of curvature of the third bending section 13, bending suffered by second bending section 12
Stress is minimum, i.e., described first bending section 11 and the third bending section 13 are the most easily broken of the foldable display panel 100
The region split.
The bending stress of second bending section 12 is less than the bending stress of first bending section 11, second bending
The bending stress of section 12 is less than the bending stress of the third bending section 13.
The volume for alleviating stress members 30 is less than described in first bending section 11 in second bending section 12
Alleviate the volume of stress members 30, it is curved to be less than the third for the volume for alleviating stress members 30 in second bending section 12
The volume for alleviating stress members 30 in tune 13.
Referring to Fig. 6, on first bending section 11 to the direction of second bending section 12, the alleviation stress structure
The volume of part 30 is gradually reduced, on second bending section 12 to the direction of the third bending section 13, the alleviation stress
The volume of component 30 gradually increases.
In the foldable display panel 100 of the application, when the radius of curvature, described second curved of first bending section 11
When the radius of curvature of tune 12 and the equal radius of curvature of the third bending section 13, first bending section 11, described second
The volume of the alleviation stress members 30 in bending section 12 and the third bending section 13 is equal.
In Fig. 3~Fig. 4, biggish first bending section 11 of bending stress and the corresponding institute of the third bending section 13
State alleviate stress members 30 volume it is larger, the corresponding alleviation stress structure of lesser second bending section 12 of bending stress
The small volume of part 30, the stress for avoiding the 10 theca interna structure of folding region are concentrated, and the foldable display surface is improved
The bending performance of plate 100.
The application also proposed a kind of foldable display module, and the foldable display module includes above-mentioned foldable display
Panel and layer of polarizer, cover layer on above-mentioned display panel etc..The working principle of the foldable display module and institute
The working principle for stating foldable display panel is same or similar, and the application is not repeating.
Present applicant proposes a kind of foldable display panel and preparation method thereof, the foldable display panel includes folding
Area；At least two pixel units and the alleviation stress between adjacent two pixel unit are provided in the folding region
Component；The folding region includes the first bending section, the second bending section and third bending section；The alleviation stress members are described
The volume of first bending section, second bending section and the third bending section is different.The application passes through the phase in folding region
The alleviation stress members are set between adjacent two pixel units, reduces foldable display panel bending when folding and answers
Power makes the foldable display panel can be realized smaller bending angle.
Although above preferred embodiment is not to limit in conclusion the application is disclosed above with preferred embodiment
The application processed, those skilled in the art are not departing from spirit and scope, can make various changes and profit
Decorations, therefore the protection scope of the application subjects to the scope of the claims.
Claims (10)
1. a kind of foldable display panel, which is characterized in that including folding region；
It is provided at least two pixel units in the folding region and the alleviation between adjacent two pixel unit is answered
Power component；
The folding region includes the first bending section, the second bending section and third bending section；
It is described alleviate stress members first bending section, second bending section and the third bending section volume not
Together.
2. foldable display panel according to claim 1, which is characterized in that
The folding region is provided with substrate and the tft layer on the substrate；
The tft layer includes at least two thin film transistor (TFT)s；
The corresponding pixel unit of one thin film transistor (TFT)；
The alleviation stress members are between adjacent two thin film transistor (TFT).
3. foldable display panel according to claim 2, which is characterized in that the tft layer includes at least two
A signal contact via hole and an at least groove；
Flexible material is filled in the groove, to form the alleviation stress members；
The groove is formed in etch process with signal contact via hole with along with.
4. foldable display panel according to claim 3, which is characterized in that the cross sectional shape of the groove includes rectangular
At least one of shape, square, inverted trapezoidal.
5. foldable display panel according to claim 1, which is characterized in that
When radius of curvature of the radius of curvature of second bending section less than first bending section and the third bending section
Radius of curvature when, the volume for alleviating stress members is greater than described slow in first bending section in second bending section
The volume of stress members is solved, the volume for alleviating stress members is greater than institute in the third bending section in second bending section
State the volume for alleviating stress members.
6. foldable display panel according to claim 5, which is characterized in that
On first bending section to the direction of second bending section, the volume for alleviating stress members is gradually increased,
On second bending section to the direction of the third bending section, the volume for alleviating stress members is gradually reduced.
7. foldable display panel according to claim 1, which is characterized in that
When radius of curvature of the radius of curvature of second bending section greater than first bending section and the third bending section
Radius of curvature when, the volume for alleviating stress members is less than described slow in first bending section in second bending section
The volume of stress members is solved, the volume for alleviating stress members is less than institute in the third bending section in second bending section
State the volume for alleviating stress members.
8. foldable display panel according to claim 7, which is characterized in that
On first bending section to the direction of second bending section, the volume for alleviating stress members is gradually reduced,
On second bending section to the direction of the third bending section, the volume for alleviating stress members is gradually increased.
9. foldable display panel according to claim 1, which is characterized in that when the curvature half of first bending section
When the radius of curvature of diameter, the radius of curvature of second bending section and the third bending section is equal, first bending section,
The volume of the alleviation stress members in second bending section and the third bending section is equal.
10. a kind of production method of foldable display panel characterized by comprising
At least dielectric layers of covering signal lead are formed on the substrate；
An at least groove is formed on the insulating layer in the folding region of the foldable display panel using etch process；
Organic material is filled, in the groove to form alleviation stress members；
The folding region includes the first bending section, the second bending section and third bending section, and the alleviation stress members are described
The volume of first bending section, second bending section and the third bending section is different.
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| CN201910513520.5A CN110264878A (en) | 2019-06-14 | 2019-06-14 | Foldable display panel and production method |
| PCT/CN2019/111210 WO2020248450A1 (en) | 2019-06-14 | 2019-10-15 | Foldable display panel, display module and manufacturing method |
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| WO2020248450A1 (en) | 2020-12-17 |
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Application publication date: 20190920 |