CN204271085U - An organic light emitting display device - Google Patents

Abstract

The utility model relates to a kind of organic light-emitting display device, comprise and drive substrate and encapsulated layer, the first pixel confining layers and luminescence unit is provided with in the confined space that described driving substrate and described encapsulated layer are formed, described first pixel confining layers forms continuous print network, described luminescence unit is filled in described network, and described first pixel confining layers is black-matrix layer.The utility model efficiently solves the phenomenon that existing white light OLED variegates OLED luminescence unit side light leak in filter technology, improve the utilance of OLED luminescence, also can improve the contrast of organic light-emitting display device simultaneously, improve the image displaying quality of display device.

Description

An organic light emitting display device

technical field

The utility model relates to an organic light emitting display device, in particular to a white light organic light emitting display device.

Background technique

Organic Light-emitting Diode (OLED) has the advantages of active luminescence, high luminous efficiency, fast response time, low operating voltage, wide viewing angle, high contrast, wide operating temperature range, and flexible display. It is the third generation display technology after CRT and LCD.

Contrast is one of the important indicators of a display, and its quality directly affects the picture quality of the display, so it has always been an indicator that manufacturers and consumers attach great importance to. OLED displays have the advantage of self-illumination, and the brightness is zero in the dark state, so they have the advantage of ultra-high contrast. But for white light OLED (WOLED) plus color filter (CF) technology, OLED is equivalent to a backlight source, and there will be certain problems in contrast.

In order to achieve full-color OLED displays, lamination of WOLED substrates and CF substrates is a widely used technology. This technology can avoid deformation of the shadow mask caused by evaporation after resolution increase or large size. . In the prior art, when laminating the TFT array substrate and the CF layer, there will be a gap of a certain value between the CF layer and the WOLED light-emitting layer, and because the WOLED light-emitting layer has the characteristics of a self-luminous light source, the light emitted by the organic light-emitting unit When the light reaches the color filter substrate in the lateral direction, the gap will cause the manufactured WOLED display to leak laterally, thereby causing color mixing of the product, and further affecting the quality of the white light OLED display device.

As shown in Figures 1-a and 2-a, for WOLED+CF, most WOLEDs emit light in the direction indicated by arrow ①, but there are also some dotted line arrows in the direction of light emission, and the light emission methods of these dotted lines are It will produce color mixing and reduce the contrast of the screen, so it is necessary to eliminate or reduce such effects.

Aiming at the above problems, some solutions are currently available, as shown in Figures 1-b and 2-b. In Figure 1-b, the packaging cover of the OLED device is directly used as the substrate of the color filter, so that the distance between the WOLED and the color filter is reduced, and the gap is reduced, which can play a certain effect. In Figure 2-b, the color filter part is directly made on the TFT driving layer, which can also significantly improve the display effect and reduce color mixing. However, the problem of light loss on the side of the OLED has not been fundamentally resolved.

Utility model content

The technical problem to be solved by the utility model is that the existing WOLED display has the problem of lateral light leakage, so as to provide an OLED device with higher display resolution.

In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:

An organic light-emitting display device, comprising a driving substrate and an encapsulation layer, a first pixel defining layer and a light-emitting unit are arranged in a closed space formed by the driving substrate and the encapsulating layer, and the first pixel defining layer forms a continuous A grid structure, the light-emitting units are filled in the grid structure, and the first pixel defining layer is a black matrix layer.

The first pixel defining layer and the light emitting unit are disposed on the substrate, and the light emitting unit is one of a red light emitting unit, a green light emitting unit, a blue light emitting unit or a combination thereof.

Preferably, the light emitting unit is a white light emitting unit, and the first pixel defining layer and the white light emitting unit constitute a white light OLED.

The organic light emitting display device further includes a color filter arranged above or below the white OLED; the color filter includes: a second pixel defining layer and a color filter unit formed on the same layer, and the second pixel defining The layers form a continuous grid structure, and the color filter units are filled in the grid structure;

The light emitting surface of the white light emitting unit is set close to the color filter;

Both the first pixel defining layer and the second pixel defining layer are black matrix, the openings of the first pixel defining layer should correspond to the openings of the second pixel defining layer one by one, and the second pixel defining layer is smaller than equal to the first pixel definition layer opening.

The color filter is arranged under the white OLED, and the second pixel defining layer and the color filter unit are arranged on a side of the driving substrate away from the encapsulation layer.

The color filter is arranged on the driving substrate, and the white light OLED is arranged on the color filter.

The color filter also includes a CF substrate, the CF substrate of the color filter is attached to the drive substrate, and the second pixel definition layer and the color filter unit are arranged on the CF substrate away from the drive substrate side.

The color filter is arranged above the white OLED, and the second pixel defining layer and the color filter unit are arranged on a side of the encapsulation layer away from the driving substrate.

The color filter further includes a CF substrate, the CF substrate of the color filter is attached to the encapsulation layer, and the second pixel definition layer and the color filter unit are arranged on the CF substrate away from the encapsulation layer one side; the color filter unit at least includes a red filter unit, a green filter unit, and a blue filter unit.

The black matrix is a black photoresist material layer.

Compared with the prior art, the above-mentioned technical solution of the utility model has the following advantages:

(1) The organic light-emitting display device provided by the utility model adopts a black photoresist material in the first pixel definition layer without increasing the process and cost, and the black first pixel definition layer can absorb the light emitted from the side of the light-emitting unit, At the same time, it can also absorb the incident light from the outside to improve the contrast of the display.

(2) As a preferred mode, when the light-emitting unit of the present invention is a white light-emitting unit, the second pixel definition layer in the color filter also adopts a black photoresist material to reduce the light emitted from the side and improve the performance of the organic light-emitting display. Contrast, improve the light utilization efficiency of white OLED.

(3) As a preferred method, the first pixel defining layer in the white WOLED and the second pixel defining layer in the color filter use black matrix materials of the same material, without adding new materials and processes, both are existing technologies, The method is simple and easy to implement, can reduce the side light loss of the OLED light-emitting unit, improve the utilization rate of the OLED light-emitting light, and can improve the contrast of the organic light-emitting display device at the same time.

(4) In the mode of bottom-emitting white light plus color filter, as shown in Figure 3-a, the black matrix layer in the color filter 104 can be combined with the pixel definition layer 102" between the white OLED light-emitting units. Two into one", one process is done, one photolithography process is reduced, and the cost is reduced.

Description of drawings

In order to make the content of the utility model easier to understand clearly, the utility model will be described in further detail below in conjunction with the accompanying drawings, wherein,

Fig. 1-a, 1-b, 2-a, 2-b are the structural representations of prior art;

Fig. 3 is a structural schematic diagram of the three-primary-color light-emitting display device of the present invention;

Fig. 4-a is a schematic structural diagram of the first embodiment of the bottom light-emitting display device of the present invention;

Fig. 4-b is a schematic structural view of the second embodiment of the bottom light-emitting display device of the present invention;

Fig. 4-c is a schematic structural diagram of a third embodiment of a bottom-emitting display device of the present invention;

Fig. 5-a is a schematic structural view of the first embodiment of the top-emitting display device of the present invention;

Fig. 5-b is a schematic structural diagram of the second embodiment of the top-emitting display device of the present invention;

The reference signs in the figure represent:

101 - drive substrate, 102 - first pixel definition layer, 103 - encapsulation layer, 104 - color filter, 105 - CF substrate, 106 - second pixel definition layer, 107 - color filter unit, 108 - light emitting unit. the

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the implementation of the present utility model will be further described in detail below in conjunction with the accompanying drawings.

This invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of the invention to those skilled in the art, and the invention will only be defined by the appended claims. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. It will be understood that when an element such as a layer, region or substrate is referred to as being "disposed on" or "disposed on" another element, it can be directly on the other element or present middle element. In contrast, when an element is referred to as being "directly disposed on" or "directly disposed on" another element, there are no intervening elements present.

Example 1 Ordinary RGB three primary color display mode

As shown in FIG. 3 , an organic light-emitting display device in this embodiment includes a driving substrate 101 and an encapsulation layer 103. The drive substrate 101 and the encapsulation layer 103 form a closed space, and the driving substrate 101 is provided with a first pixel. Defined layer 102 and light emitting unit 108, the first pixel defined layer 102 forms a continuous grid structure, the light emitting unit is filled in the grid structure, the first pixel defined layer 102 is a black matrix layer, so The light emitting unit 108 is one of a red light emitting unit, a green light emitting unit, a blue light emitting unit or a combination thereof.

In the light-emitting display device of this embodiment, a driving substrate 101 containing a TFT driving part is firstly formed, a first pixel defining layer 102 is prepared on the driving substrate 101, and then light-emitting units 108 are respectively prepared in the pixel-defining area. The units are a red light emitting unit (R), a green light emitting unit (G), and a blue light emitting unit (B). After the light emitting units are prepared, they are packaged as a whole to form the packaging layer 103 and finally form an organic light emitting display device. The first pixel defining layer 102 is made of black photoresist material, and the black first pixel defining layer 102 can absorb the light emitted from the side of the light-emitting unit, and also absorb the incident light from the outside to improve the contrast of the display.

Example 2 Display mode of bottom-emitting white light plus color filter

As shown in FIG. 4-a, an organic light-emitting display device in this embodiment includes a driving substrate 101 and an encapsulation layer 103, and a color filter is arranged in a closed space formed by the driving substrate 101 and the encapsulation layer 103. 104 and a light emitting unit 108 (this embodiment is a white light OLED), the color filter 104 is set on the driving substrate 101 , and the white light OLED is set on the color filter 104 .

The white light OLED includes a first pixel defining layer 102 and a white light emitting unit, the first pixel defining layer 102 forms a continuous grid structure, the light emitting units are filled in the grid structure, and the first pixel The definition layer 102 is a black matrix layer.

The color filter 104 includes: a second pixel defining layer 106 and a color filter unit 107 formed in the same layer, the second pixel defining layer 106 forms a continuous grid structure, and the color filter unit 107 is filled in In the grid structure; the color filter unit 107 at least includes a red light filter unit, a green light filter unit, and a blue light filter unit. The light emitting surface of the white light emitting unit is set close to the color filter 104;

Both the first pixel defining layer 102 and the second pixel defining layer 106 are black matrix, the openings of the first pixel defining layer 102 should correspond to the openings of the second pixel defining layer 106 one by one, and the second The pixel defining layer 106 is smaller than or equal to the opening of the first pixel defining layer 102 .

The black matrix is a black photoresist material layer, such as a photoresist dispersed with carbon black or organic black pigment, or a black metal such as Cr.

In the light-emitting display device of this embodiment, first prepare the driving substrate 101 containing the TFT driving part, and the color filter layer 104 is directly arranged on the TFT driving substrate, wherein the color filter layer includes two parts: the second pixel defining layer 106 (black matrix ) and color filter unit 107. The first pixel defining layer 102 is disposed on the color filter layer, and the material used in the first pixel defining layer 102 is the same as that used in the black matrix in the color filter layer 104, both of which are black photoresist materials. In some cases Next, the black matrix in the color filter layer 104 and the first pixel defining layer 102 can be manufactured in one process to complete two film layers, reducing one photolithography process and reducing the cost. The WOLED light-emitting device is prepared on the first pixel defining layer and packaged as a whole, and 103 is the packaging layer.

Since the side of the WOLED is the first pixel defining layer 102, and the first pixel defining layer uses a black photoresist material, the light emitted from the side of the WOLED is absorbed by the material of the pixel defining layer, and there is no light emitted from the side, so the contrast will be significantly improved. .

Similarly, in the case of bottom-emitting white light plus color filters for other displays, the use of black photoresist material for the pixel definition layer will also have the effect of improving the contrast of the organic light-emitting display.

Example 3 Display mode of bottom-emitting white light plus color filter

As shown in FIG. 4-b, an organic light-emitting display device in this embodiment includes a driving substrate 101 and an encapsulation layer 103, and a light-emitting unit 108 ( This embodiment is a white light OLED), and the white light OLED is arranged on the driving substrate 101, and its structure is the same as that of the white light OLED in the second embodiment. The color filter 104 includes: a second pixel defining layer 106 and a color filter unit 107 formed in the same layer on the CF substrate 105, the second pixel defining layer 106 forms a continuous grid structure, and the color filter The light unit 107 is filled in the grid structure; the color filter 104 is arranged under the white OLED, the CF substrate 105 of the color filter is attached to the driving substrate 101, and the second pixel The limiting layer 106 and the color filter unit 107 are disposed on a side of the CF substrate 105 away from the driving substrate 101 , that is, disposed below the CF substrate 105 .

Both the first pixel defining layer 102 and the second pixel defining layer 106 are black matrix, the openings of the first pixel defining layer 102 should correspond to the openings of the second pixel defining layer 106 one by one, and the second The pixel defining layer 106 is smaller than or equal to the opening of the first pixel defining layer 102 .

Since the side of the WOLED is the first pixel defining layer 102, and the first pixel defining layer uses a black photoresist material, the light emitted from the side of the WOLED is absorbed by the material of the pixel defining layer, and there is no light emitted from the side, so the contrast will be significantly improved. .

Example 4 Display mode of bottom-emitting white light plus color filter

As shown in FIG. 4-c, the structure of an organic light-emitting display device in this embodiment is compared with that of Embodiment 3, without a CF substrate 105, and other structures are the same as in Embodiment 3, and the color filter 104 is disposed on the Below the white OLED, the second pixel defining layer 106 and the color filter unit 107 are arranged on the side of the driving substrate 101 away from the encapsulation layer 103 .

Since the side of the WOLED is the first pixel defining layer 102, and the first pixel defining layer uses a black photoresist material, the light emitted from the side of the WOLED is absorbed by the material of the pixel defining layer, and there is no light emitted from the side, so the contrast will be significantly improved. .

Embodiment 5 Display mode of top-emitting white light plus color filter

As shown in Figure 5-a, the light-emitting organic light-emitting display device of the present invention includes a driving substrate 101 and an encapsulation layer 103, and a white light OLED is arranged in a closed space formed by the drive substrate 101 and the encapsulation layer 103, and the The white light OLED is arranged on the driving substrate 101, and its structure is the same as that of the white light OLED in the second embodiment. The color filter 104 includes a second pixel defining layer 106 and a color filter unit 107 formed in the same layer, the second pixel defining layer 106 forms a continuous grid structure, and the color filter unit 107 is filled in the In the grid structure; the color filter 104 is arranged above the white OLED, and the second pixel defining layer 106 and the color filter unit 107 are arranged on a side of the encapsulation layer 103 away from the driving substrate 101 side. The structure of the white light OLED is the same as that in Example 2.

In the light-emitting display device of this embodiment, a driving substrate 101 containing a TFT driving part is formed first, and a first pixel defining layer 102 is prepared on the driving substrate 101. The first pixel defining layer 102 adopts a black photoresist material, and then the first pixel defining layer 102 The light-emitting unit 108 is prepared on the layer 102, and the light-emitting unit is a WOLED light-emitting layer. After the device is prepared, it is packaged as a whole to form the packaging layer 103. The color filter layer 104 is directly prepared on the packaging layer 103, sometimes in the color filter layer. A protective layer is prepared on top of the color filter layer to prevent the material of the color filter layer from absorbing water to cause the display effect to deteriorate. This aspect is not described in detail here, but it is also within the scope of this embodiment, and an organic light-emitting display device is finally formed.

Embodiment 6 Display mode of top-emitting white light plus color filter

As shown in Figure 5-b, the structure of the light-emitting organic light-emitting display device of the present invention is the same as that of Embodiment 5, wherein the color filter 104 includes: a second pixel defining layer 106 formed on the same layer as the CF substrate 105 and A color filter unit 107, the second pixel defining layer 106 forms a continuous grid structure, and the color filter unit 107 is filled in the grid structure; the color filter 104 is arranged on the white OLED Above, the CF substrate 105 of the color filter is attached to the encapsulation layer 103, and the second pixel definition layer 106 and the color filter unit 107 are arranged on the side of the CF substrate 105 away from the encapsulation layer 103 , that is, disposed above the CF substrate 105 .

In the top emission mode shown in Figure 5-b, the color filter is a separate substrate, which is attached externally, and a black photoresist material is also used in the first pixel definition layer 102 to reduce the light emitted from the side and improve the organic The contrast ratio of light-emitting displays improves the light utilization efficiency of white OLEDs.

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, on the basis of the above description, other changes or changes in different forms can also be made. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the scope of protection of the utility model.

Claims (10)

1. an organic light-emitting display device, comprise and drive substrate (101) and encapsulated layer (103), the first pixel confining layers (102) and luminescence unit (108) is provided with in the confined space that described driving substrate (101) and described encapsulated layer (103) are formed, described first pixel confining layers (102) forms continuous print network, described luminescence unit is filled in described network, it is characterized in that: described first pixel confining layers (102) is black-matrix layer.

2. organic light-emitting display device according to claim 1, it is characterized in that, first pixel confining layers (102) and luminescence unit (108) are arranged on described driving substrate (101), and described luminescence unit (108) is red light-emitting unit, one in green luminescence unit, blue light emitting unit or its combination.

3. organic light-emitting display device according to claim 1, it is characterized in that, described luminescence unit (108) is white-light emitting unit, and described first pixel confining layers (102) and white-light emitting unit form white light OLED.

4. organic light-emitting display device according to claim 3, it is characterized in that, described organic light-emitting display device also comprises the colored filter (104) be arranged on above or below white light OLED;

Described colored filter (104) comprising: the second pixel confining layers (106) formed with layer and colored light-filtering units (107), described second pixel confining layers (106) forms continuous print network, and described colored light-filtering units (107) is filled in described network;

The exiting surface of described white-light emitting unit is arranged near described colored filter (104);

Described first pixel confining layers (102) and described second pixel confining layers (106) are black matrix", the opening of described first pixel confining layers (102) should with the second pixel confining layers (106) opening one_to_one corresponding, and described second pixel confining layers (106) is less than or equal to the first pixel confining layers (102) opening.

5. organic light-emitting display device according to claim 4, it is characterized in that, described colored filter (104) is arranged on the below of described white light OLED, and the second pixel confining layers (106) and colored light-filtering units (107) are arranged on the side of described driving substrate (101) away from described encapsulated layer (103).

6. organic light-emitting display device according to claim 4, it is characterized in that, described colored filter (104) is arranged on described driving substrate (101), and described white light OLED is arranged on described colored filter (104).

7. organic light-emitting display device according to claim 4, it is characterized in that, described colored filter (104) also comprises CF substrate (105), CF substrate (105) and the described driving substrate (101) of colored filter are fitted and are arranged, and described second pixel confining layers (106) and colored light-filtering units (107) are arranged on the side of described CF substrate (105) away from described driving substrate (101).

8. organic light-emitting display device according to claim 4, it is characterized in that, described colored filter (104) is arranged on the top of described white light OLED, and the second pixel confining layers (106) and colored light-filtering units (107) are arranged on the side of described encapsulated layer (103) away from described driving substrate (101).

9. organic light-emitting display device according to claim 8, it is characterized in that, described colored filter (104) also comprises CF substrate (105), CF substrate (105) and the described encapsulated layer (103) of colored filter are fitted and are arranged, and described second pixel confining layers (106) and colored light-filtering units (107) are arranged on the side of described CF substrate (105) away from described encapsulated layer (103); Described colored light-filtering units (107) at least comprises ruddiness filter unit, green glow filter unit, blue light filter unit.

10. according to the arbitrary described organic light-emitting display device of claim 1-9, it is characterized in that, described black matrix" is black photoresist layer.