CN107068902A - A kind of display device - Google Patents

A kind of display device Download PDF

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Publication number
CN107068902A
CN107068902A CN201710149695.3A CN201710149695A CN107068902A CN 107068902 A CN107068902 A CN 107068902A CN 201710149695 A CN201710149695 A CN 201710149695A CN 107068902 A CN107068902 A CN 107068902A
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CN
China
Prior art keywords
display
layer
ink
display panel
cover plate
Prior art date
Application number
CN201710149695.3A
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Chinese (zh)
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CN107068902B (en
Inventor
陆静茹
陈晓和
Original Assignee
上海天马有机发光显示技术有限公司
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Priority to CN201710149695.3A priority Critical patent/CN107068902B/en
Publication of CN107068902A publication Critical patent/CN107068902A/en
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Publication of CN107068902B publication Critical patent/CN107068902B/en

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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L51/00Solid state devices using organic materials as the active part, or using a combination of organic materials with other materials as the active part; Processes or apparatus specially adapted for the manufacture or treatment of such devices, or of parts thereof
    • H01L51/50Solid state devices using organic materials as the active part, or using a combination of organic materials with other materials as the active part; Processes or apparatus specially adapted for the manufacture or treatment of such devices, or of parts thereof specially adapted for light emission, e.g. organic light emitting diodes [OLED] or polymer light emitting devices [PLED]
    • H01L51/52Details of devices
    • H01L51/5237Passivation; Containers; Encapsulation, e.g. against humidity
    • H01L51/524Sealing arrangements having a self-supporting structure, e.g. containers
    • H01L51/5246Sealing arrangements having a self-supporting structure, e.g. containers characterised by the peripheral sealing arrangements, e.g. adhesives, sealants

Abstract

The invention discloses a kind of display device, to improve the intensity of display device, strengthen the impact resistance of display device.Display device includes display panel, cover plate, and the optical clear glue-line that display panel and cover plate are bonded, wherein:Cover plate includes non-display area and viewing area, and non-display area is provided with black-out ink layer in the side close to display panel, and viewing area is provided with transparent ink in the side close to display panel and fills up layer, and it is identical with black-out ink layer thickness that transparent ink fills up layer.

Description

A kind of display device

Technical field

The present invention relates to display technology field, more particularly to a kind of display device.

Background technology

AMOLED (Active Matrix Organic Light Emitting Diode, active matrix organic light-emitting two Pole pipe) display panel compare traditional liquid crystal panel, have the advantages that reaction speed is fast, contrast is high, visual angle is wide.Moreover, AMOLED display panels also have self luminous characteristic, without using backlight module, therefore, lighter than traditional liquid crystal panel It is thin, it may be omitted with the cost of backlight module.Many advantages make it have good application prospect.

As shown in figure 1, the schematic cross-section of the display screen for prior art display device, display panel 01 and cover plate 02 it Between be bonded using gelatine layer 03, wherein, cover plate 02 is provided with black-out ink layer towards the non-display area of the side of display panel 01 04, glue is liquid glue, after liquid glue is coated between display panel 01 and cover plate 02 and is solidified, you can form gelatine layer 03.Due to the thickness management and control of the display device using AMOLED display panels, the thickness of gelatine layer 03, which is generally required, to be less than 0.15mm.It was found by the inventors of the present invention that the shock-absorbing capacity of gelatine layer 03 is very poor under the thickness, AMOLED display panels are caused to hold Easily occurs crack damage.

The content of the invention

The purpose of the embodiment of the present invention is to provide a kind of display device, to improve the intensity of display device, enhancing display dress The impact resistance put.

The display device that the embodiment of the present invention is provided includes display panel, cover plate, and by the display panel and institute The optical clear glue-line of cover plate bonding is stated, wherein:

The cover plate includes non-display area and viewing area, and the non-display area is set in the side close to the display panel There is black-out ink layer, the viewing area is provided with transparent ink in the side close to the display panel and fills up layer, described transparent It is identical with the black-out ink layer thickness that ink fills up layer.

Optionally, the transparent ink fills up layer and fills up layer or heat cure transparent ink including ultraviolet curing transparent ink Fill up layer.

It is preferred that, the transparent ink fills up layer and fills up layer including organic transparent ink.

It is preferred that, the transmitance that the transparent ink fills up layer is not less than 90%.

It is preferred that, the thickness of the optical clear glue-line is 0.024mm~0.15mm.

It is preferred that, the optical clear glue-line is acrylic optical clear glue-line.

It is preferred that, the thickness of the black-out ink layer is 12 μm~40 μm.

It is preferred that, the thickness of the black-out ink layer is 12 μm~24 μm.

It is preferred that, the black-out ink layer has sandwich construction.

It is preferred that, the display panel is active matrix organic light-emitting diode display panel.

In technical scheme, cover plate and display panel are bonded using optical clear glue-line, due to the screening of cover plate Gloss oil layer of ink fills up that thickness degree is identical with transparent ink, therefore cover plate is flat surface towards the surface of display panel side, is adopted Display panel and cover plate are bonded with the optical clear glue-line of solid-state, it is possible to achieve be brought into close contact and be not easy air blister defect occur. Compared with prior art, under condition of equivalent thickness, more preferably, therefore, the program can strengthen aobvious the shock-absorbing capacity of optical clear glue-line The impact resistance of showing device, improves the intensity of display device.

Brief description of the drawings

Fig. 1 is the schematic cross-section of the display screen of prior art display device;

Fig. 2 is the schematic cross-section of the display screen of one embodiment of the invention display device;

Fig. 3 is the cover plate top view of one embodiment of the invention display device;

Fig. 4 is one embodiment of the invention display screen surface identification point position view.

Reference:

Prior art part:

01- display panels;

02- cover plates;

03- gelatine layers;

04- black-out ink layers;

Part of the present invention:

1- display panels;

2- cover plates;

3- optical clear glue-lines;

4- black-out ink layers;

5- transparent inks fill up layer.

Embodiment

To improve the intensity of display device, strengthen the impact resistance of display device, it is aobvious the embodiments of the invention provide one kind Showing device.To make the object, technical solutions and advantages of the present invention clearer, further detailed is made to the present invention by the following examples Describe in detail bright.

In this application, finished product of the display panel after Nian Jie with cover plate is referred to as display screen.As shown in Figures 2 and 3, Fig. 2 For the schematic cross-section of the display screen of one embodiment of the invention display device;Fig. 3 is the lid of one embodiment of the invention display device Plate top view.Display device provided in an embodiment of the present invention, including display panel 1, cover plate 2, and by display panel 1 and cover plate The optical clear glue-line 3 of 2 bondings, wherein:Cover plate 2 includes non-display area and viewing area, and non-display area is close to display panel 1 Side is provided with black-out ink layer 4, and viewing area is provided with transparent ink in the side close to display panel 1 and fills up layer 5, transparent ink It is identical with the thickness of black-out ink layer 4 that water fills up layer 5.

In technical scheme, cover plate and display panel are bonded using optical clear glue-line, due to the screening of cover plate Gloss oil layer of ink fills up that thickness degree is identical with transparent ink, thus cover plate towards the surface of display panel side be flat surface;Enter And, be bonded display panel 1 and during cover plate 2 using the optical clear glue-line 3 of solid-state, the two sides of optical clear glue-line 3 with it is smooth Surface is contacted, it is possible to achieve is brought into close contact, is made to be not easy gas occur between optical clear glue-line 3 and cover plate 2 or display panel 1 Defect is steeped, compared with prior art, under condition of equivalent thickness, more preferably, therefore, the program can for the shock-absorbing capacity of optical clear glue-line 3 To strengthen the impact resistance of display device;In the inventive solutions, in the viewing area of cover plate 2 and the phase of black-out ink layer 4 With side be provided with transparent ink and fill up layer 5, and ink fills up that layer 5 is identical with the thickness of black-out ink layer 4, and both can be with shape Into a smooth plane, when making, transparent ink is filled up layer 5 and can made by the way of inkjet printing, and technique is simple, And transparent ink fills up the thickness of layer 5 uniformly, make profile pattern of the cover plate 2 towards the side of display panel 1 preferable, be conducive to It is further to improve the adhesion strength that optical clear glue-line 3 is bonded display panel 1 and cover plate 2.

Conventionally, as glue is in a liquid state before curing, with mobility, by display panel 01 and cover plate During 02 bonding, the gap that glue can be filled up between display panel 01 and cover plate 02, the planarization no requirement (NR) to the surface of cover plate 02, Can be bonded with display panel 01 by cover plate 02.

In this application, Optical transparent adhesive is with certain thickness solid-state glue, if cover plate 2 is towards display panel 1 Surface is not flat surface, then bubble occurs between the surface of optical clear glue-line 3 and cover plate 2, therefore, the application is in cover plate 2 viewing area sets transparent ink to fill up layer 5 towards the side of black-out ink layer 4, makes cover plate 2 towards the side of display panel 1 For flat surface, when cover plate 2 is Nian Jie by transparent optical glue-line 3 with display panel 1, because cover plate 2 is towards display panel 1 Side is flat surface, therefore, is not in bubble between the surface of optical clear glue-line 3 and cover plate 2.Black-out ink layer 4 Thickness is generally tens microns, and the formed flat surface of layer 5 is filled up using ink, can by the way of inkjet printing system Make, technique is simple, and thickness is controllable and uniformity is good.

As shown in figure 1, in prior art display device, display panel 01 and cover plate 02 are bonded using glue, cover plate it is non- Glue thickness c corresponding to viewing area1For 0.15mm, the glue thickness c corresponding to the viewing area of cover plate2Then it is more than 0.15mm; As shown in Fig. 2 in the application display device, display panel 1 and cover plate 2 are bonded using optical clear glue-line 3, and cover plate 2 is towards aobvious The side for showing panel 1 is flat surface, and the thickness c of optical clear glue-line 3 is unanimously 0.15mm.Inventor is aobvious to prior art The shock-absorbing capacity of showing device mesoglea and the shock-absorbing capacity of the application display device mesoglea have carried out analysis contrast experiment, specifically Process is as follows:

Identification point is chosen in display screen surface, it is specific as shown in figure 4, being one embodiment of the invention display screen surface identification point The label of position view, as seen from the figure each identification point;

The display screen level of display device is positioned on testing stand upward;

Using steel ball free-falling above each identification point of the display screen of display device of same size, height of drop For h1, each identification point position of display screen is hit, the cracks of the display screen of display device are observed;

If display screen does not occur crackle, the height of drop of steel ball is adjusted to h2, h2> h1, then repeatedly abovementioned steps;

If there is crackle in display screen, record this shock of steel ball height of drop, identification point numbering and display screen it is aobvious Show situation.

The glue-line shock-absorbing capacity experiment of prior art display device, as shown in Table 1, the application display is filled its data record The glue-line shock-absorbing capacity experiment put, its data record is as shown in Table 2.

Display device is numbered Height of drop mm Failure phenomenon 1 155 Display panel crackle at No. 9 identification points, display is abnormal 2 63 Display panel crackle at No. 7 identification points, no display 3 125 Display panel crackle at No. 9 identification points, display is abnormal 4 94 Display panel crackle at No. 7 identification points, no display 5 125 Display panel crackle at No. 9 identification points, display is abnormal Height of drop average value 112

Table one is the glue-line shock-absorbing capacity Experiment Data Records table of prior art display device

Display device is numbered Height of drop mm Failure phenomenon 1 187 Display panel crackle at No. 9 identification points, no display 2 187 Display panel crackle at No. 9 identification points, no display 3 187 Display panel crackle at No. 7 identification points, no display 4 125 Display panel crackle at No. 9 identification points, display is abnormal 5 220 Display panel crackle at No. 9 identification points, no display Height of drop average value 181

Table two is the glue-line shock-absorbing capacity Experiment Data Records table of the application display device

From the experimental data of table one and table two can be seen that when gelatine layer and optical clear glue-line black-out ink layer with it is aobvious When the thickness for showing between panel is 0.15mm, the prior art display device of cover plate and display panel is bonded using gelatine layer, When the average height of drop of steel ball is 112mm, there is crackle and display exception or the situation without display in display screen;And utilize The application display device of optical clear glue-line adhesive cover plate and display panel, when the average height of drop of steel ball is 181mm, shows Just there is crackle and display exception or the situation without display in display screen, it is seen then that the shock resistance of the application display device is more It is good, it is also seen that the shock-absorbing capacity of optical clear glue-line is better than the shock-absorbing capacity of gelatine layer under condition of equivalent thickness.Therefore, it is our Case can strengthen the intensity of display device, improve the impact resistance of display device.

In the present invention, transparent ink, which fills up layer, to fill up layer for ultraviolet curing transparent ink, or thermosetting Change transparent ink and fill up layer.Ultraviolet light solidified ink is the ink-jet ink for starting recent years to occur and developing rapidly, is a kind of The ink of environment-friendly type, is had the advantages that rate of drying is fast, cost is low, production efficiency is high and cleaning, when making, is beaten using ink-jet Printing apparatus, ink is sprayed on the setting position of cover plate, and ultraviolet curing transparent is solidify to form at once after recycling ultraviolet photoetching Ink fills up layer.Heat cure transparent ink can certainly be made by the way of conventional heat cure fill up layer.No matter use Which kind of in curing mode, this programme, when making transparent ink and filling up layer, in order to improve the precision of inkjet printing, it will will cover Plate cools, and recycles ink jet printing device, ink is sprayed on to the setting position of cover plate, can be adjusted by setting drop density Transparent ink fills up the thickness of layer, so as to fill up thickness degree identical with the thickness of black-out ink layer for the transparent ink made, so that Cover plate is set to form flat surface towards the side of display panel;And then, it is bonded display panel and cover plate using optical clear glue-line When, optical clear glue-line is contacted with flat surface, makes to be not easy air blister defect occur between optical clear glue-line and cover plate, the party Case can strengthen the impact resistance of display device.

In the particular embodiment, above-mentioned transparent ink fills up layer and fills up layer for organic transparent ink, and transparent ink is filled out The transmitance for mending layer is not less than 90%.Because transparent ink fills up the viewing area that layer corresponds to cover plate, thus, it is ensured that translucency Can, so that display device has preferable display effect.Light transmittance can meet printing opacity demand not less than 90%.

Using technical solution of the present invention, the thickness of optical clear glue-line is 0.024mm~0.15mm, can be very good to meet The thin property requirement of display device, and with preferable shock-absorbing capacity, improve the shock resistance of display panel.Work as Optical transparent adhesive Thickness be more than 0.024mm when, you can firm bonding display panel and cover plate, meet to optical clear glue-line adhesive strength It is required that, in thickness increase, the adhesive strength and shock-absorbing capacity of optical clear glue-line also further increase, enhancing display device Impact resistance.

In specific scheme, optical clear glue-line is acrylic optical clear glue-line.Acrylic Optical transparent adhesive has The performances such as clarity is high, translucency is good, adhesion is strong, high durable, wet-heat resisting and uvioresistant, in addition, use will not for a long time Produce yellow, stripping and it is rotten the problem of.

In embodiments of the present invention, black-out ink layer can use single layer structure or sandwich construction, for example, in an implementation In example, black-out ink layer has six layer structure, including the first white ink layer, mirror-like silver ink layer, the clean oil being sequentially stacked Layer of ink, the second white ink layer, gray oil layer of ink and black ink layer.

When black-out ink layer uses sandwich construction, gross thickness can be 12 μm~40 μm, the thickness of every layer of ink for 6 μm~ 8μm.In order to reduce finished product thickness and reach preferable shaded effect, black-out ink layer is preferred to use two layers or three-decker, Gross thickness is 12 μm~24 μm.

In addition, can be colored ink layers arc close to the black-out ink layer of cover plate when black-out ink layer uses sandwich construction, There can also be certain pattern.

In a specific embodiment of the invention, the display panel of display device can be AMOLED (Active Matrix Organic Light Emitting Diode, active matrix organic light-emitting diode) display panel.AMOLED display panels have There is self luminous characteristic, without using backlight module, therefore, more frivolous than traditional liquid crystal panel, this programme is conducive to using The further thickness thinning of display device of AMOLED display panels.Certainly, display panel can also be other types of OLED (Organic Light-Emitting Diode, Organic Light Emitting Diode) display panel or TFT (Thin Film Transistor, thin film transistor (TFT)) display panel such as display panel

Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to comprising including these changes and modification.

Claims (10)

1. a kind of display device, it is characterised in that including display panel, cover plate, and by the display panel and the cover plate The optical clear glue-line of bonding, wherein:
The cover plate includes non-display area and viewing area, and the non-display area is provided with screening in the side close to the display panel Gloss oil layer of ink, the viewing area is provided with transparent ink in the side close to the display panel and fills up layer, the transparent ink Fill up layer identical with the black-out ink layer thickness.
2. display device as claimed in claim 1, it is characterised in that it is saturating including ultraviolet light solidification that the transparent ink fills up layer Bright ink fills up layer or heat cure transparent ink fills up layer.
3. display device as claimed in claim 1, it is characterised in that the transparent ink, which fills up layer, includes organic transparent ink Fill up layer.
4. display device as claimed in claim 1, it is characterised in that the transmitance that the transparent ink fills up layer is not less than 90%.
5. display device as claimed in claim 1, it is characterised in that the thickness of the optical clear glue-line be 0.024mm~ 0.15mm。
6. display device as claimed in claim 1, it is characterised in that the optical clear glue-line is acrylic Optical transparent adhesive Layer.
7. display device as claimed in claim 1, it is characterised in that the thickness of the black-out ink layer is 12 μm~40 μm.
8. display device as claimed in claim 7, it is characterised in that the thickness of the black-out ink layer is 12 μm~24 μm.
9. display device as claimed in claim 1, it is characterised in that the black-out ink layer has sandwich construction.
10. the display device as described in any one of claim 1~9, it is characterised in that the display panel has for active matrix Machine LED display panel.
CN201710149695.3A 2017-03-14 2017-03-14 A kind of display device CN107068902B (en)

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CN107369390A (en) * 2017-09-12 2017-11-21 昆山国显光电有限公司 A kind of display module and preparation method thereof
CN107545848A (en) * 2017-08-25 2018-01-05 武汉华星光电半导体显示技术有限公司 Flexible cover plate and preparation method thereof, flexible OLED display
CN107863407A (en) * 2017-12-14 2018-03-30 天合光能股份有限公司 A kind of two-sided double glass photovoltaic component glass backboards and two-sided double glass photovoltaic modulies
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US10620665B2 (en) 2018-02-05 2020-04-14 Guangdong Oppo Mobile Telecommunications Corp., Lt Terminal display assembly and mobile terminal
US10659582B2 (en) 2018-03-30 2020-05-19 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Display screen, terminal display screen assembly, and mobile terminal

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