CN203895463U - OLED (Organic light emitting diode) display panel and masking plate - Google Patents
OLED (Organic light emitting diode) display panel and masking plate Download PDFInfo
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- CN203895463U CN203895463U CN201420323340.3U CN201420323340U CN203895463U CN 203895463 U CN203895463 U CN 203895463U CN 201420323340 U CN201420323340 U CN 201420323340U CN 203895463 U CN203895463 U CN 203895463U
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Abstract
The utility model provides an OLED display panel and a masking plate. The OLED display panel comprises a luminescent layer and a cathode arranged at the light emitting side of the luminescent layer, the cathode is provided with gaps, and light emitted by the luminescent layer can directly pass through the gaps. Compared with cathodes which are arranged at the entire surface in the prior art, the light, which is emitted by the luminescent layer, absorbed and reflected by the cathodes is reduced, the light out-coupling efficiency of the OLED display panel is increased, the micro cavity effect is weakened, and the problem that the display color of the OLED display panel changes with the visual angle is solved.
Description
Technical field
The utility model includes OLED (OLED) Display Technique field, relates in particular to a kind of OLED display floater and mask plate.
Background technology
Please refer to Fig. 1, Fig. 1 is a cross-sectional view of OLED display floater of the prior art, this OLED display floater mainly comprises: underlay substrate 101, reflective metal layer 102, anode 103, hole transmission layer (HTL) 104, luminescent layer (EML) 105, electron transfer layer (ETL) 106, semi-transparent metals negative electrode (Cathode) 107, and light removing layer 108.Wherein, hole transmission layer 104, luminescent layer 105, electron transfer layer 106 and metallic cathode 107 are all to adopt vacuum evaporation process to carry out film forming conventionally, the mask plate (mask) adopting in vacuum evaporation process has fine metal mask plate (FMM, Fine metal mask) and common layer metal mask plate (Open mask), and metallic cathode 107 normally adopts Open mask to carry out vacuum evaporation, the metallic cathode that adopts Open mask to form is the metallic cathode of whole setting.
Because metallic cathode is all very strong for the absorption of light and reflection, therefore comprise that the loss of light of the OLED display floater of the metallic cathode of whole setting is very large, cause light emission rate very low (please refer to Fig. 2), the arrow in figure represents direction of light.In addition, because metallic cathode is larger to reflection of light, therefore make to form microcavity effect in OLED display floater, and a shortcoming of microcavity effect is exactly, display color can have significant change with the variation at visual angle.
Utility model content
In view of this, the utility model provides a kind of OLED display floater and mask plate, and to solve, existing OLED display floater light emission rate is low, display color is with the problem of visual angle change.
For solving the problems of the technologies described above, the utility model provides a kind of OLED display floater, comprises luminescent layer and is positioned at the negative electrode of described luminescent layer bright dipping side, and described luminescent layer comprises multiple sub-pixs; On described negative electrode, be provided with the gap of the transmitance for improving the light that described luminescent layer sends.
Preferably, described negative electrode comprises: at least two spaced cathode electrode units, are provided with described gap between described cathode electrode unit.
Preferably, the position in the gap between the gap between described cathode electrode unit and described sub-pix is corresponding, and width is less than or equal to the width in the gap between corresponding described sub-pix.
Preferably, described multiple sub-pixs and described at least two cathode electrode units all arrange along the line direction interval of display floater, the described sub-pix of the corresponding at least one row of cathode electrode unit described in each.
Preferably, described multiple sub-pixs arrange along the line direction interval of display floater, and described multiple cathode electrode units arrange along the column direction interval of display floater, at least sub-pix described in a line of cathode electrode unit correspondence described in each.
Preferably, described cathode electrode unit is bar shaped.
Preferably, described cathode electrode unit comprises: multiple sub-pix covering parts and for connecting the refinement portion of adjacent described sub-pix covering part, wherein, the corresponding one or more sub-pixs of each sub-pix covering part, the width of described refinement portion is less than the width of described sub-pix covering part.
Preferably, described in each, cathode electrode unit is joined together to form an entirety by being arranged at the connecting line of periphery, viewing area.
The utility model embodiment also provides a kind of mask plate of the negative electrode for the preparation of OLED display floater, comprise and see through district and blocked area, in the time that described mask plate adopts negative photoresist, the described pattern in district that sees through is corresponding to the pattern of the cathode electrode unit on described negative electrode, and the pattern of described blocked area is corresponding to the pattern in the gap between described cathode electrode unit; In the time that described mask plate adopts positive photoresist, the pattern of described blocked area is corresponding to the pattern of the cathode electrode unit on described negative electrode, and the described pattern in district that sees through is corresponding to the pattern in the gap between described cathode electrode unit.
The beneficial effect of technique scheme of the present utility model is as follows:
On the negative electrode of OLED display floater, form gap, on the position in gap, the light that the luminescent layer of OLED display floater sends can directly see through, compared with the negative electrode of whole setting in prior art, can reduce absorption and the reflection of the light that negative electrode sends luminescent layer, improve the light emission rate of OLED display floater, and can weaken microcavity effect, solved the display color of OLED display floater with the problem of visual angle change.
Brief description of the drawings
Fig. 1 is a cross-sectional view of OLED display floater of the prior art.
Fig. 2 is the light path schematic diagram of the light that sends of the luminescent layer of the OLED display floater in Fig. 1.
Fig. 3 is the cross-sectional view of the OLED display floater of the utility model embodiment mono-.
Fig. 4 is the structural representation of the negative electrode of the OLED display floater in Fig. 3.
Fig. 5 is the negative electrode of OLED display floater and the vertical view of luminescent layer in Fig. 3.
The light path schematic diagram of the light that the luminescent layer of the OLED display floater of Fig. 6 the utility model embodiment mono-sends.
Fig. 7 is the cross-sectional view of the OLED display floater of the utility model embodiment bis-.
Fig. 8 is the structural representation of the negative electrode of the OLED display floater in Fig. 7.
Fig. 9 is the negative electrode of OLED display floater and the vertical view of luminescent layer in Fig. 7.
Figure 10 is the structural representation of the negative electrode of the OLED display floater of the utility model embodiment tri-.
Figure 11 is the negative electrode of OLED display floater and the vertical view of luminescent layer of the utility model embodiment tri-.
Figure 12 is the negative electrode of OLED display floater and the vertical view of luminescent layer of the utility model embodiment tetra-.
Figure 13 is the structural representation of the negative electrode of the OLED display floater of the utility model embodiment five.
Figure 14 is the structural representation of the negative electrode of the OLED display floater of the utility model embodiment six.
Figure 15 is the structural representation for the preparation of the mask plate of the negative electrode of the OLED display floater in the utility model embodiment mono-.
Figure 16 is the structural representation for the preparation of the mask plate of the negative electrode of the OLED display floater in the utility model embodiment tri-.
Embodiment
In order to solve, existing OLED display floater light emission rate is low, display color is with the problem of visual angle change, the utility model embodiment provides a kind of OLED display floater, this OLED display floater comprises luminescent layer and is positioned at the negative electrode of described luminescent layer bright dipping side, is provided with the gap of the transmitance for improving the light that described luminescent layer sends on described negative electrode.
On the position in described gap, the light that described luminescent layer sends can directly see through, compared with the negative electrode of whole setting in prior art, can reduce absorption and the reflection of the light that negative electrode sends luminescent layer, improve the light emission rate of OLED display floater, and can weaken microcavity effect, solve the display color of OLED display floater with the problem of visual angle change.
Negative electrode in the utility model embodiment can be the structure of multiple kind, as long as be provided with above-mentioned gap on it.
Preferably, described negative electrode comprises at least two spaced cathode electrode units, is provided with described gap between described cathode electrode unit.
Preferably, the position in the gap between the gap between described cathode electrode unit and described sub-pix is corresponding, and width is less than or equal to the width in the gap between corresponding described sub-pix, to guarantee normally to inject electronics to described luminescent layer.
Preferably, described multiple cathode electrode units are matrix-style to be arranged, and described matrix is N × N matrix, and wherein, described N is greater than 1 positive integer.
Preferably, described multiple sub-pixs and described at least two cathode electrode units all arrange along the line direction interval of display floater, the described sub-pix of the corresponding at least one row of cathode electrode unit described in each.
Or described multiple sub-pixs arrange along the line direction interval of display floater, described multiple cathode electrode units are along the column direction setting of display floater, at least sub-pix described in a line of cathode electrode unit correspondence described in each.
Preferably, described cathode electrode unit is bar shaped, and certainly, described cathode electrode unit can be also other shapes.
Negative electrode in the utility model embodiment can be semi-transparent metals negative electrode.
OLED display floater in above-described embodiment, except comprising luminescent layer and negative electrode, can also comprise: underlay substrate, reflective metals, anode, hole transmission layer, electron transfer layer and optical transport layer etc.
Anode in the utility model embodiment can be dots structure.
For making the technical problems to be solved in the utility model, technical scheme and advantage clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
Embodiment mono-
Please refer to Fig. 3, Fig. 3 is the cross-sectional view of the OLED display floater of the utility model embodiment mono-.
The OLED display floater of the utility model embodiment comprises: underlay substrate 301, reflective metals 302, anode 303, hole transmission layer 304, luminescent layer 305, electron transfer layer 306, negative electrode 307 and light removing layer 308.Certainly,, in some other embodiment of the present utility model, more above-mentioned layer is not necessary, as reflective metals 302, light removing layer 308 etc.
Described luminescent layer 305 comprises three sub-pixs (red sub-pixel 3051, green sub-pix 3052 and blue sub-pix 3053), certainly, in some other embodiment of the present utility model, described sub-pix is not limited to red sub-pixel, green sub-pix and blue sub-pix, and the number of sub-pix is also not limited to three.
Please also refer to Fig. 4, Fig. 4 is the structural representation of the negative electrode of the OLED display floater in Fig. 3.
Described negative electrode 307 comprises: multiple spaced cathode electrode units 3071, are provided with the gap 3072 of the transmitance for improving the light that luminescent layer sends between described cathode electrode unit 3071.
In the present embodiment, the plurality of cathode electrode unit 3071 that is positioned at viewing area connects into an entirety by being arranged at the connecting line of periphery, viewing area, is then connected with drive circuit.
As can be seen from Figure 4, the multiple cathode electrode units 3071 in the utility model embodiment are matrix-style to be arranged, the matrix that described matrix is 1 × N, and wherein, described N is greater than 1 positive integer.
Please also refer to Fig. 5, Fig. 5 is the negative electrode of OLED display floater and the vertical view of luminescent layer in Fig. 3.
Red sub-pixel 3051, green sub-pix 3052 and blue sub-pix 3053 in the utility model embodiment arranges along line direction (hereinafter to be referred as the line direction) interval of display floater.From Fig. 3 and Fig. 5, can find out, described multiple cathode electrode unit 3071 is interval setting in the row direction also, the described sub-pix of the corresponding row of cathode electrode unit 3071 described in each, the width that described in each, cathode electrode unit 3071 is gone up in the row direction equals the width that a corresponding row sub-pix is gone up in the row direction, thereby make described cathode electrode unit 3071 can cover corresponding described sub-pix completely, to guarantee normally to inject electronics to described luminescent layer.
Please refer to Fig. 6, the light path schematic diagram of the light that the luminescent layer of the OLED display floater of Fig. 6 the utility model embodiment mono-sends.As can be seen from Figure 6, on the position in described gap 3072, the light that described luminescent layer sends can directly see through, compared with the negative electrode of whole setting in prior art, can reduce absorption and the reflection of the light that negative electrode sends luminescent layer, improve the light emission rate of OLED display floater, and can weaken microcavity effect, solved the display color of OLED display floater with the problem of visual angle change.
Embodiment bis-
Please refer to Fig. 7-9, Fig. 7 is the cross-sectional view of the OLED display floater of the utility model embodiment bis-, and Fig. 8 is the structural representation of the negative electrode of the OLED display floater in Fig. 7, and Fig. 9 is the negative electrode of OLED display floater and the vertical view of luminescent layer in Fig. 7.
The difference of the utility model embodiment and embodiment is, the described sub-pix of corresponding three row of cathode electrode unit 3071 described in each, and the width that described in each, cathode electrode unit 3071 is gone up in the row direction equals the width that the corresponding described sub-pix of three row is gone up in the row direction.
Certainly, in some other embodiment of the present utility model, the columns of the corresponding sub-pix of each cathode electrode unit 3071 can be also other numbers, as two row, four row etc.
In above-described embodiment, the width that each cathode electrode unit 3071 is gone up is in the row direction equal to the width that corresponding sub-pix is gone up in the row direction, certainly, in some other embodiment of the present utility model, the width that each cathode electrode unit 3071 is gone up in the row direction also can be greater than the width that corresponding sub-pix is gone up in the row direction.
Embodiment tri-
Please refer to Figure 10 and Figure 11, Figure 10 is the structural representation of the negative electrode of the OLED display floater of the utility model embodiment tri-.Figure 11 is the negative electrode of OLED display floater and the vertical view of luminescent layer of the utility model embodiment tri-.
As can be seen from Figure 10, the multiple cathode electrode units in the utility model embodiment are matrix-style to be arranged, the matrix that described matrix is N × 1, and wherein, described N is greater than 1 positive integer.
As can be seen from Figure 11, the red sub-pixel 3051 in the utility model embodiment, green sub-pix 3052 and blue sub-pix 3053 arrange at interval in the row direction.Described multiple cathode electrode unit 3071 is along arranging with column direction (hereinafter to be referred as the column direction) interval of display floater.Sub-pix described in the corresponding a line of cathode electrode unit 3071 described in each, described in each, the width of cathode electrode unit 3071 on column direction equals corresponding a line sub-pix width on column direction, thereby make described cathode electrode unit 3071 can cover corresponding described sub-pix completely, to guarantee normally to inject electronics to described luminescent layer.
Embodiment tetra-
Please refer to Figure 12, Figure 12 is the negative electrode of OLED display floater and the vertical view of luminescent layer of the utility model embodiment tetra-, the difference of the present embodiment and embodiment tri-is, sub-pix described in corresponding two row of cathode electrode unit 3071 described in each, described in each, the width of cathode electrode unit 3071 on column direction equals the corresponding width of two row sub-pixs on column direction.
Certainly, in some other embodiment of the present utility model, the line number of the corresponding sub-pix of each cathode electrode unit 3071 can be also other numbers, as three row, four row or multiple rows more.
In above-described embodiment, the width of each cathode electrode unit 3071 on column direction is equal to the width of corresponding sub-pix on column direction, certainly, in some other embodiment of the present utility model, the width of each cathode electrode unit 3071 on column direction also can be greater than the width of corresponding sub-pix on column direction.
In the various embodiments described above, described multiple sub-pixs in the row direction interval arrange, and certainly, in other embodiment of the present utility model, described multiple sub-pixs also can arrange along column direction interval.
In the various embodiments described above, described cathode electrode unit is all regular bar shaped, and in some other embodiment of the present utility model, cathode electrode unit can be also other shapes.
Embodiment five
Please refer to Figure 13, Figure 13 is the structural representation of the negative electrode of the OLED display floater of the utility model embodiment five.In the present embodiment, described cathode electrode unit 3071 is irregular bar shaped, comprise multiple sub-pix covering parts 401 and refinement portion 402 for being connected adjacent described sub-pix covering part 401, wherein, each sub-pix covering part 402 can corresponding one or more sub-pixs, and the width of described refinement portion 402 is less than the width of described sub-pix covering part 401.
In the present embodiment, the plurality of cathode electrode unit 3071 that is positioned at viewing area is joined together to form an entirety by being arranged at the connecting line of periphery, viewing area, is then connected with drive circuit.
Embodiment six
Please refer to Figure 14, Figure 14 is the structural representation of the negative electrode of the OLED display floater of the utility model embodiment six, in the present embodiment, cathode electrode unit 3071 couples together in viewing area, under this kind of structure, do not need each cathode electrode unit 3071 to be all joined together to form an entirety with the connecting line that is positioned at periphery, viewing area, be then connected with drive circuit.
The utility model embodiment also provides a kind of mask plate of the negative electrode for the preparation of the OLED display floater described in above-described embodiment, described mask plate comprises through district and blocked area, in the time that described mask plate adopts negative photoresist, the described pattern in district that sees through is corresponding to the pattern of the cathode electrode unit on described negative electrode, and the pattern of described blocked area is corresponding to the pattern in the gap between described cathode electrode unit.When described mask plate adopts positive photoresist, the pattern of described blocked area is corresponding to the pattern of the cathode electrode unit on described negative electrode, and the described pattern in district that sees through is corresponding to the pattern in the gap between described cathode electrode unit.
Describe as an example of mask plate employing negative photoresist example below.
Please refer to Figure 15, Figure 15 is the mask plate for the preparation of the negative electrode of the OLED display floater of the utility model embodiment mono-, described mask plate comprises through district 501 and blocked area 502, the described pattern in district 501 that sees through is corresponding to the pattern of the cathode electrode unit 3071 on described negative electrode, and described blocked area 502 is corresponding to the pattern in the gap 3072 between described cathode electrode unit 3071.
Please refer to Figure 16, Figure 16 is the mask plate for the preparation of the negative electrode of the OLED display floater of the utility model embodiment tri-, described mask plate comprises through district 501 and blocked area 502, the described pattern in district 501 that sees through is corresponding to the pattern of the cathode electrode unit 3071 on described negative electrode, and described blocked area 502 is corresponding to the pattern in the gap 3072 between described cathode electrode unit 3071.
The utility model embodiment also provides a kind of preparation method of OLED display floater, comprises that the mask plate adopting in above-described embodiment forms the step of negative electrode.The preparation method of described OLED display floater adopts vacuum evaporation process to form described negative electrode.
Concrete, described step comprises:
Cathodic coating material is placed in to the evaporation source in vacuum chamber;
Near a side of evaporation source, mask plate is set at described substrate;
By described evaporation source, described cathodic coating material is evaporated, after described cathodic coating material evaporation gasification, from described evaporation source, overflow, arrive on plated substrate surface, condense and form described negative electrode.
The above is preferred implementation of the present utility model; should be understood that; for those skilled in the art; do not departing under the prerequisite of principle described in the utility model; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (9)
1. an OLED display floater, comprises luminescent layer and is positioned at the negative electrode of described luminescent layer bright dipping side, described luminescent layer comprises multiple sub-pixs; It is characterized in that, on described negative electrode, be provided with the gap of the transmitance for improving the light that described luminescent layer sends.
2. OLED display floater according to claim 1, is characterized in that, described negative electrode comprises: at least two spaced cathode electrode units, are provided with described gap between described cathode electrode unit.
3. OLED display floater according to claim 2, is characterized in that, the position in the gap between the gap between described cathode electrode unit and described sub-pix is corresponding, and width is less than or equal to the width in the gap between corresponding described sub-pix.
4. OLED display floater according to claim 2, is characterized in that, described multiple sub-pixs and described at least two cathode electrode units all arrange along the line direction interval of display floater, the described sub-pix of the corresponding at least one row of cathode electrode unit described in each.
5. OLED display floater according to claim 2, it is characterized in that, described multiple sub-pix arranges along the line direction interval of display floater, and described multiple cathode electrode units arrange along the column direction interval of display floater, at least sub-pix described in a line of cathode electrode unit correspondence described in each.
6. OLED display floater according to claim 2, is characterized in that, described cathode electrode unit is bar shaped.
7. OLED display floater according to claim 2, it is characterized in that, described cathode electrode unit comprises: multiple sub-pix covering parts and for connecting the refinement portion of adjacent described sub-pix covering part, wherein, the corresponding one or more sub-pixs of each sub-pix covering part, the width of described refinement portion is less than the width of described sub-pix covering part.
8. according to the OLED display floater described in claim 2-7 any one, it is characterized in that, described in each, cathode electrode unit is joined together to form an entirety by being arranged at the connecting line of periphery, viewing area.
9. the mask plate for the preparation of the negative electrode of OLED display floater, it is characterized in that, comprise and see through district and blocked area, in the time that described mask plate adopts negative photoresist, the described pattern in district that sees through is corresponding to the pattern of the cathode electrode unit on described negative electrode, and the pattern of described blocked area is corresponding to the pattern in the gap between described cathode electrode unit; In the time that described mask plate adopts positive photoresist, the pattern of described blocked area is corresponding to the pattern of the cathode electrode unit on described negative electrode, and the described pattern in district that sees through is corresponding to the pattern in the gap between described cathode electrode unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420323340.3U CN203895463U (en) | 2014-06-17 | 2014-06-17 | OLED (Organic light emitting diode) display panel and masking plate |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104134681A (en) * | 2014-06-17 | 2014-11-05 | 京东方科技集团股份有限公司 | Organic light emitting diode display panel, preparation method of organic light emitting diode display panel, and mask |
| WO2020124423A1 (en) * | 2018-12-19 | 2020-06-25 | 京东方科技集团股份有限公司 | Display panel and manufacturing method therefor, and display apparatus |
| WO2021201032A1 (en) * | 2020-03-31 | 2021-10-07 | ソニーセミコンダクタソリューションズ株式会社 | Display device |
-
2014
- 2014-06-17 CN CN201420323340.3U patent/CN203895463U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104134681A (en) * | 2014-06-17 | 2014-11-05 | 京东方科技集团股份有限公司 | Organic light emitting diode display panel, preparation method of organic light emitting diode display panel, and mask |
| US9818970B2 (en) | 2014-06-17 | 2017-11-14 | Boe Technology Group Co., Ltd. | Organic light emitting diode display panel, manufacturing method thereof and mask plate |
| CN104134681B (en) * | 2014-06-17 | 2018-01-23 | 京东方科技集团股份有限公司 | A kind of organic LED display panel and preparation method thereof, mask plate |
| WO2020124423A1 (en) * | 2018-12-19 | 2020-06-25 | 京东方科技集团股份有限公司 | Display panel and manufacturing method therefor, and display apparatus |
| US11348978B2 (en) | 2018-12-19 | 2022-05-31 | Boe Technology Group Co., Ltd. | Display panel and method for manufacturing the same, and display device |
| WO2021201032A1 (en) * | 2020-03-31 | 2021-10-07 | ソニーセミコンダクタソリューションズ株式会社 | Display device |
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