WO2016149969A1

WO2016149969A1 - Substrate for oled display and display device

Info

Publication number: WO2016149969A1
Application number: PCT/CN2015/076886
Authority: WO
Inventors: 路林; 曹建伟
Original assignee: 青岛海信电器股份有限公司
Priority date: 2015-03-25
Filing date: 2015-04-17
Publication date: 2016-09-29
Also published as: CN104835830A; CN104835830B

Abstract

A substrate for OLED display and a display device relate to the technical field of display, and solve the problems of complex driving and large power consumption caused by driving other sub-pixels by the existing OLED display device for adjusting the chromaticity coordinate or the color temperature balance. The substrate for OLED display comprises a color filter layer (22), and the color filter layer (22) comprises the filter patterns of at least four different colors, wherein a red filter pattern (221) is formed on the substrate for display at the position corresponding to a first sub-pixel, a green filter pattern (222) is formed at the position corresponding to a second sub-pixel, a blue filter pattern (223) is formed at the position corresponding to a third sub-pixel, and a white filter pattern (224) and a filter pattern of at least one color except white and black are formed at the position corresponding to a fourth sub-pixel. The luminance sum of the filter patterns of the colors except white and black is not greater than 20% of the luminance of the fourth sub-pixel.

Description

Substrate and display device for OLED display

The present application claims priority to Chinese Patent Application No. 201510133759.1, entitled "A OLED Display Substrate and Display Device", filed on March 25, 2015, the entire contents of which are incorporated herein by reference. In the application.

Technical field

The present invention relates to the field of display technologies, and in particular, to a substrate for OLED display and a display device.

Background technique

OLED (Organic Light-Emitting Diode) displays have been widely used in the field of display technology. The basic structure of the OLED display includes an anode, a light-emitting functional layer, and a cathode, wherein the light-emitting functional layer is formed using an organic light-emitting material.

The color display of OLED is generally realized in two ways: one is to use white organic light-emitting material combined with color filter to realize color display; the other is to use high-precision metal mask to vaporize organic light-emitting materials with different primary colors to form color sub- The pixels implement a color display.

Among them, in the method of realizing color display by using a white light organic light-emitting material combined with a color filter, generally, in order to improve brightness and display realism, white light and color filter are often used to form red, green, blue, and white four-color sub-pixels. However, the OLED display device (mainly white organic light-emitting material) changes color coordinate or color temperature of the display panel as the operating voltage and current change. Among them, the color temperature is high, the blue component is high, and the color performance is cold; on the contrary, when the color temperature is low, the red component is high, the color performance is warm, and the color coordinate or color temperature changes seriously affects the image quality.

In order to adjust the stability of color coordinates or color temperature, it is possible to use not only white sub-pixel display, red sub-pixel, green sub-pixel, blue sub-pixel or the like when the pixel is displayed in white on the driving control end such as the movement chip or the timing control circuit. Any combination is displayed at the same time to adjust the color coordinate or color temperature balance when the pixel displays white. However, on the one hand, this method requires a complex algorithm to calculate according to the viewing angle of the human eye, and on the other hand, it will cause a large increase in power consumption.

Summary of the invention

Embodiments of the present invention provide a substrate for OLED display and a display device, wherein the OLED display substrate is formed with a white filter pattern and at least one other color other than white and black at a position corresponding to the fourth sub-pixel. Filter pattern, on the one hand, filter patterns of other colors than white and black The sum of the illuminating brightness is not more than 20% of the fourth sub-pixel illuminating brightness, and the display color abnormality can be avoided; on the other hand, when the fourth sub-pixel is separately displayed, the pixel displays white and other colors except white and black. The color of the filter pattern can adjust the color coordinate or color temperature balance when the pixel displays white, avoiding the problem of driving complexity and power consumption caused by driving other sub-pixels for display.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

In one aspect, an embodiment of the present invention provides a substrate for an OLED display, which is applied to an OLED display device, where the display device includes a plurality of pixels, and each of the pixels includes: a first sub-pixel, a second sub-pixel, and a third sub- a pixel and a fourth sub-pixel, the display substrate includes a color filter layer, the color filter layer includes at least four filter patterns of different colors, wherein the color filter layer corresponds to the first sub- a red filter pattern is formed at a position of the pixel, a green filter pattern is formed at a position corresponding to the second sub-pixel, and a blue filter pattern is formed at a position corresponding to the third sub-pixel, in the corresponding place a white filter pattern and a filter pattern of at least one other color other than white and black are formed at a position of the fourth sub-pixel, and the filter pattern of the color other than white or black is formed. The sum of the luminances of the light is not more than 20% of the luminance of the fourth sub-pixel.

Preferably, the filter pattern of at least one other color other than white and black includes at least one of a red filter pattern, a green filter pattern, and a blue filter pattern.

Preferably, the filter pattern of at least one other color other than white and black includes: a red filter pattern and a blue filter pattern.

Preferably, at a position corresponding to the fourth sub-pixel, the luminance of the red filter pattern is not greater than the luminance of the blue filter pattern.

Preferably, the illuminating brightness of the red filter pattern is not more than 10% of the fourth sub-pixel illuminating brightness, and the illuminating brightness of the blue filter pattern is not more than 20% of the fourth sub-pixel illuminating brightness. .

Preferably, an area of the red filter pattern is equal to an area of the blue filter pattern, and a thickness of the red filter pattern is greater than a thickness of the blue filter pattern; or

The thickness of the red filter pattern is equal to the thickness of the blue filter pattern, and the area of the red filter pattern is smaller than the area of the blue filter pattern.

On the other hand, an embodiment of the present invention provides an OLED display device, including an array substrate and a package substrate, wherein the array substrate or the package substrate is any of the display substrates provided by the embodiments of the present invention.

Preferably, when the array substrate is the display substrate according to any one of the embodiments of the present invention, the array substrate further includes: a first substrate; and a TFT array formed on the first substrate, a pixel defining layer, a first electrode, a second electrode, and a light emitting functional layer formed between the first electrode and the second electrode, The TFT includes a gate, a gate insulating layer, an active layer, a source and a drain, and the first electrode is electrically connected to the source or the drain.

Preferably, the color filter layer is formed between the pixel defining layer and the light emitting functional layer.

Preferably, when the package substrate is the substrate for display according to any of the embodiments of the present invention, the array substrate includes: a first substrate, and a TFT array and a pixel formed on the first substrate Defining a layer, a first electrode, a second electrode, and a light emitting functional layer formed between the first electrode and the second electrode, wherein the TFT comprises: a gate, a gate insulating layer, an active layer, and a source And a drain, the first electrode being electrically connected to the source or the drain.

Embodiments of the present invention provide a substrate for OLED display and a display device, wherein the OLED display substrate is formed with a white filter pattern and at least one other color other than white and black at a position corresponding to the fourth sub-pixel. The filter pattern, on the one hand, the sum of the light-emitting luminances of the filter patterns of the colors other than white and black is not more than 20% of the brightness of the fourth sub-pixel, and the display color abnormality can be avoided; The fourth sub-pixel is provided with at least one other color filter pattern other than white and black, so that when the fourth sub-pixel is separately displayed, the white and the other color filter patterns other than white and black are simultaneously displayed. The color can adjust the color coordinate or color temperature balance when the pixel displays white, avoiding the problem of driving complexity and power consumption caused by driving other sub-pixels for display.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic cross-sectional view of a conventional OLED display device;

2 is a schematic diagram of a conventional pixel structure;

FIG. 3 is a schematic structural diagram of a pixel according to an embodiment of the present disclosure;

4 is a schematic structural diagram of another pixel according to an embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of an OLED display device according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of a method for fabricating a bottom emission type OLED display device according to an embodiment of the present invention; FIG.

FIG. 7 is a schematic diagram of a method for fabricating a top emission type OLED display device according to an embodiment of the present invention.

Reference mark:

10-pixel; 11-substrate substrate; 12-TFT array; 13-anode; 14-light-emitting functional layer; 15-cathode; 16-pixel defining layer; 22-color filter layer; 101-array substrate; 102-package substrate; 221-red filter pattern; 222-green filter pattern; 223-blue filter pattern; 224-white filter pattern.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In order to facilitate understanding of the technical solution of the present invention, the display principle of the color display of the white light organic light emitting material combined with the color filter is first explained.

As shown in FIG. 1 , an OLED display device includes an array substrate 101 and a package substrate 102 . The array substrate 101 includes a base substrate 11 and a TFT array formed on the base substrate 11 . 12. A pixel defining layer 16, an anode 13 electrically connected to a source or a drain of the TFT, a light emitting functional layer 14, and a cathode 15. When the anode 13 and the cathode 15 are simultaneously loaded with a voltage, the light-emitting function layer 14 located between the anode 13 and the cathode 15 emits white light. A color filter layer 22 is formed on the package substrate 102. The color filter layer 22 includes a red filter pattern 221, a green filter pattern 222, a blue filter pattern 223, and a white filter pattern 224, which respectively correspond to an anode. Forming a red sub-pixel, a green sub-pixel, a blue sub-pixel, and a white sub-pixel. As shown in FIG. 2 , it is a schematic top view of a color filter pattern in one pixel, including a red (R) sub-pixel, a green (G) sub-pixel, a blue (B) sub-pixel, and a white (Y) sub-pixel.

In all embodiments of the invention, it is necessary to clarify the definition of "layer" and "pattern", and the relationship between them. Wherein, "layer" refers to a film formed by deposition or other process on a substrate by using a certain material; if the film needs a patterning process during the whole process, the "layer" after the patterning process is included At least one film "pattern".

For example, the color filter layer may be a red filter film, a green filter film, a blue filter film, and a white filter film formed on a transparent substrate, and a red filter pattern and a green filter formed by a patterning process. Light pattern, blue filter pattern, and white filter pattern.

It should be noted that the electrode electrically connected to the source or the drain of the TFT may also be a cathode, and the other electrode may be an anode. In the embodiment of the present invention, an electrode electrically connected to the source or the drain of the TFT is taken as an anode for description.

In the prior art, if the pixel displays red, it may be a red sub-pixel display, and other sub-pixels are not displayed; if the pixel displays blue, it may be a blue sub-pixel display, and other sub-pixels are not displayed; If it is green, it can be green sub-pixel display, other sub-pixels are not displayed; but when the pixel is white, the white sub-pixel display is also displayed, and the red sub-pixel and the blue sub-pixel are also displayed to display the white sub-pixel. The compensation causes a problem that the driving of the display device is complicated and the power consumption is large.

It should be noted that the sub-pixel display, that is, the cathode and the anode corresponding to the sub-pixel are simultaneously loaded with voltage, so that the light-emitting functional layer of the sub-pixel emits light, that is, display is realized. The sub-pixel is not displayed, that is, the cathode and/or the anode are not loaded with voltage, so that the light-emitting functional layer of the sub-pixel cannot emit light, and display cannot be realized.

An embodiment of the present invention provides a substrate for an OLED display, which is applied to an OLED display device. The display device includes a plurality of pixels, and each pixel includes: a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel. The display substrate includes a color filter layer, and the color filter layer includes at least four filter patterns of different colors, wherein the color filter layer is formed with a red filter pattern at a position corresponding to the first sub-pixel, corresponding to the second a green filter pattern is formed at a position of the sub-pixel, a blue filter pattern is formed at a position corresponding to the third sub-pixel, a white filter pattern is formed at a position corresponding to the fourth sub-pixel, and white and black are removed. At least one filter pattern of the other color, and the light-emitting brightness of the filter pattern of the color other than white or black is not more than 20% of the sum of the brightness of the fourth sub-pixel.

Since the color of the pixel display is the mixed color of the color displayed by each sub-pixel, a white filter pattern is formed at the corresponding fourth sub-pixel position, mainly for increasing the transmittance of the pixel, corresponding to the fourth sub- The sum of the light-emitting luminances of the filter patterns of the colors other than white and black formed at the positions of the pixels is not more than 20% of the luminance of the fourth sub-pixels, for example, 10%, 15%, etc., to avoid the display device The display color is abnormal.

For example, when a red filter pattern, a green filter pattern, and a blue filter pattern are formed at positions corresponding to the fourth sub-pixel, the sum of the luminances of the red filter pattern, the green filter pattern, and the blue filter pattern is not More than 20% of the fourth sub-pixel luminance. Of course, according to different display devices, the sum of the light-emitting luminances of the filter patterns of the colors other than white and black formed at the positions corresponding to the fourth sub-pixels may be not more than 40% of the brightness of the fourth sub-pixels. . In the embodiment of the present invention, it is preferable that the sum of the light-emitting luminances of the filter patterns of the colors other than white and black formed at the positions corresponding to the fourth sub-pixels is not more than 20% of the fourth sub-pixel light-emitting luminance.

It should be noted that a white filter pattern and a filter pattern of at least one other color other than white and black may be formed at a position corresponding to the fourth sub-pixel, which may be only at a position corresponding to the fourth sub-pixel. a color filter pattern of one color other than white or black is formed, and a color filter pattern of two or three colors other than white and black may be formed at a position corresponding to the fourth sub-pixel. . The color filter pattern may be a filter pattern of any color, and may be, for example, a yellow filter pattern, an orange filter pattern, or the like. The embodiments of the present invention are not specifically limited, and only the examples shown in the drawings will be described as an example.

The present invention provides a substrate for OLED display, in which a white filter pattern and a filter pattern of at least one other color other than white and black are formed at a position corresponding to the fourth sub-pixel, on the one hand, except for white The sum of the light-emitting luminances of the filter patterns of other colors other than black is not more than 20% of the brightness of the fourth sub-pixel light-emitting brightness, and the display color abnormality can be avoided; on the other hand, by removing the white and black colors in the fourth sub-pixel setting At least one filter pattern of the other color, such that when the fourth sub-pixel is separately displayed, the color of the white and the filter pattern of the color other than white and black is simultaneously displayed, and the pixel can be adjusted when the pixel is displayed in white. The color coordinate or color temperature balance avoids the problem of driving complexity and power consumption caused by driving other sub-pixels for display.

Optionally, at least one of the red filter pattern, the green filter pattern, and the blue filter pattern is formed at a position corresponding to the fourth sub-pixel.

Specifically, as shown in FIG. 3 , the display substrate is formed with a red filter pattern 221 at a position corresponding to the first sub-pixel, and a green filter pattern 222 is formed at a position corresponding to the second sub-pixel. A blue filter pattern 223 is formed at a position of the third sub-pixel, and a white filter pattern 224 and a red filter pattern 221 are formed at positions corresponding to the fourth sub-pixel. Since a red filter pattern is formed at a position corresponding to the first sub-pixel, the red filter pattern corresponding to the first sub-pixel position may be formed by a patterning process with the red filter pattern at the corresponding fourth sub-pixel position. Therefore, the material type of the color filter layer can be reduced, and the manufacturing process can be simplified.

Of course, at the position corresponding to the fourth sub-pixel, one of the red filter pattern, the green filter pattern, and the blue filter pattern may be formed, or the red filter pattern may be formed, and the green filter pattern may be formed. Any two filter patterns of the filter pattern and the blue filter pattern may be formed with a red filter pattern, a green filter pattern, and a blue filter pattern.

Preferably, as shown in FIG. 4, the display substrate is formed with a red filter pattern 221 at a position corresponding to the first sub-pixel, and a green filter pattern 222 is formed at a position corresponding to the second sub-pixel, corresponding to the third sub- A blue filter pattern 223 is formed at a position of the pixel, and a white filter pattern 224, and a red filter pattern 221 and a blue filter pattern 223 are formed at positions corresponding to the fourth sub-pixel. Since red is a warm color and blue is a cool color, a warm color tone and a cold color filter pattern are respectively formed at positions corresponding to the fourth sub-pixel, and the fourth sub-pixel can be displayed and compensated at different color temperatures.

It should be noted that, due to the different materials of the light-emitting functional layers used by different display panels, if the color coordinates and the color temperature are different under long-term operation, the compensation thereof is different, and the display panel may be different according to the specific display panel. The case is selected to be compensated for the color filter pattern. The embodiment of the present invention will be described by taking only the examples shown in FIG. 3 and FIG. 4 as an example.

Due to the different wavelengths of red and blue, the human eye is highly sensitive to red, which is preferred, corresponding to the fourth At the position of the sub-pixel, the luminance of the red filter pattern is not greater than the luminance of the blue filter pattern. Further, the illuminating brightness of the red filter pattern is smaller than the illuminating brightness of the blue filter pattern to balance the visual difference of the human eye to achieve a better visual effect.

Since the thickness and area of the color filter pattern are proportional to the brightness of the light, that is, in the area of one sub-pixel, the larger the area of the filter pattern, the greater the brightness of the light, and the smaller the thickness of the filter pattern, the greater the brightness of the light. . Then, the luminance of the red filter pattern is smaller than the luminance of the blue filter pattern, and the area of the red filter pattern may be equal to the area of the blue filter pattern, and the thickness of the red filter pattern is greater than that of the blue filter pattern. The thickness; or, the thickness of the red filter pattern is equal to the thickness of the blue filter pattern, and the area of the red filter pattern is smaller than the area of the blue filter pattern.

Further, the light emission brightness of the red filter pattern is not more than 10% of the fourth sub-pixel light-emitting brightness, and the light-emitting brightness of the blue filter pattern is not more than 20% of the fourth sub-pixel light-emitting brightness. For example, the luminance of the red filter pattern may be equal to 5% of the luminance of the fourth sub-pixel, and the luminance of the blue filter may be equal to 15% of the luminance of the fourth sub-pixel, and the luminance of the red filter. The sum of the luminances of the blue filter patterns and the blue filter pattern is equal to 20% of the luminance of the fourth sub-pixel. Alternatively, the illuminating brightness of the red filter pattern may be equal to 8% of the fourth sub-pixel illuminating brightness, and the illuminating brightness of the blue filter pattern may be equal to 12% of the fourth sub-pixel illuminating brightness, and the illuminating brightness of the red filter pattern The sum of the luminances of the blue filter patterns and the blue filter pattern is equal to 20% of the luminance of the fourth sub-pixel.

Certainly, the brightness of the red filter pattern and the brightness of the blue filter pattern may be other values, and the sum of the brightness of the red filter pattern and the brightness of the blue filter pattern may be less than the fourth sub-pixel brightness. Any other value of 20%. The embodiment of the present invention is not specifically limited, and only the above is taken as an example for description.

Specifically, the illuminating brightness of the red filter pattern is equal to 5% of the fourth sub-pixel illuminating brightness, and the illuminating brightness of the blue filtering pattern is equal to the fourth sub-pixel illuminating brightness of 15%. Then, at a position corresponding to the fourth sub-pixel, the thickness of the red filter pattern is equal to the thickness of the blue filter pattern, and the area of the red filter pattern is one-twentieth of the area of the fourth sub-pixel, blue The area of the filter pattern is three-tenths of the fourth sub-pixel area, and the area of the white filter pattern is four-fifths of the fourth sub-pixel area.

The embodiment of the present invention provides an OLED display device, as shown in FIG. 5, comprising an array substrate 101 and a package substrate 102, wherein the array substrate is a display substrate provided by an embodiment of the present invention. For example, as shown in FIG. 5, the array substrate 101 further includes: a first substrate 11, and a TFT array 12 formed on the first substrate 11, a pixel defining layer 16, a color filter layer 22, and a first electrode ( An anode) 13, a second electrode (cathode) 15 and a light-emitting function layer 14 formed between the first electrode 13 and the second electrode 15, wherein the TFT comprises: a gate electrode, a gate insulating layer, an active layer, and a source And drain, first electrode and source or drain Connection (not shown). The color filter layer 22 is formed between the first electrode 13 and the light-emitting function layer 14. The display device is a bottom-light display device, that is, the side of the light-emitting function layer close to the first electrode is the display side.

Specifically, the TFT may be an amorphous silicon TFT, a polysilicon TFT, an oxide TFT, an organic TFT, or the like. Specifically, the TFT includes a multilayer structure including a gate electrode, a gate insulating layer, an active layer, a source, and a drain. The organic light-emitting functional layer is located between the cathode and the anode, and may include a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, an electron injection layer, and the like. Wherein the cathode or the anode may be electrically connected to the source or the drain of the TFT. And by providing the light transmittance of the cathode and the anode, an OLED display panel of bottom emission, top emission or double-sided display can be fabricated.

It should be noted that, if the display panel is a bottom light emitting display device, the color filter layer may be formed under the light emitting function layer, specifically, as shown in FIG. 5; if the display device is a top light emitting display device, the color filter The light layer may be an upper surface on which the light-emitting functional layer is formed. The specific position of the color filter layer on the array substrate is not limited in the embodiment of the present invention, and the above description is only taken as an example.

In the following, an embodiment of the present invention provides a method for fabricating a display device as shown in FIG. 5, as shown in FIG.

Step 101: Select a glass substrate as a base substrate, and form a TFT array, a pixel defining layer, and a pixel electrode on the glass substrate. Wherein the TFT comprises a gate electrode, a gate insulating layer, an active layer, a source and a drain. The pixel electrode is electrically connected to the source or drain, typically as an anode.

Step 102, forming a red filter layer, a green filter layer, a blue filter layer, and a white filter layer on the pixel electrode.

Specifically, a wet filter process, such as an inkjet printing process, produces a red filter pattern of a certain thickness at a position corresponding to the first sub-pixel, and a red filter pattern of the same thickness is formed at a position of the corresponding fourth sub-pixel. . For example, the thickness of the red filter pattern may be 1 micron, and the area of the red filter pattern corresponding to the fourth sub-pixel position may be one-twentieth of the area of the fourth sub-pixel.

A green filter pattern of a certain thickness is formed at a position corresponding to the second sub-pixel by a wet process such as an inkjet printing process. By way of example, the green filter pattern can have a thickness of 1 micron.

A wet filter process, such as an inkjet printing process, produces a blue filter pattern of a certain thickness at a position corresponding to the third sub-pixel, and a blue filter pattern of the same thickness is formed at a position of the corresponding fourth sub-pixel. For example, the thickness of the blue filter pattern may be 1 micron, and the area of the blue filter pattern corresponding to the fourth sub-pixel position may be two-tenths of the fourth sub-pixel area.

Making a certain thickness at a position corresponding to the fourth sub-pixel by a wet process such as an inkjet printing process White filter pattern. By way of example, the white filter pattern can have a thickness of 1 micron. And the area of the white filter pattern corresponding to the fourth sub-pixel position may be four-fifths of the fourth sub-pixel area.

Since the pixel defining layer is mainly used to separate the respective pixel electrodes, a color filter layer is formed on the pixel electrodes, and the filter patterns of different colors may be separated by the pixel defining layer.

Step 103, forming a light-emitting functional layer and a cathode on the color filter layer.

The array substrate of the bottom emission type OLED display device is formed through the above steps 101 to 103. As shown in FIG. 5, the color filter layer is located between the anode 13 and the organic light-emitting functional layer 14. Since it is a bottom emission type OLED display device, the cathode can be opaque, the anode is transparent, and the picture is displayed on one side of the anode.

Step 104: Encapsulate the array substrate of the formed bottom emission type OLED display device by using a package substrate. The package substrate can be a packaged film or a transparent glass substrate, and the package can be implemented by a laser irradiation process.

At this time, the OLED display device is completed, and each pixel in the formed OLED display device may be as shown in FIG.

Of course, the fabrication of the bottom emission type OLED display device is not limited to the above steps. For example, a pixel defining layer or other film or layer structure may be formed on the glass substrate of the array substrate. .

The embodiment of the present invention provides an OLED display device, including an array substrate and a package substrate, wherein the package substrate is any display substrate provided by the embodiment of the present invention;

The array substrate includes: a first substrate, and a TFT array formed on the first substrate, a pixel defining layer, a first electrode, a second electrode, and a light emitting functional layer formed between the first electrode and the second electrode, wherein The TFT includes a gate, a gate insulating layer, an active layer, a source and a drain, and the first electrode is electrically connected to the source or the drain.

That is, the color filter layer is formed on the package substrate. Specifically, the filter pattern included in the color film layer can be referred to the description of the substrate for display in the embodiment of the present invention, and details are not described herein. A display device in which a color filter layer is formed on a package substrate is a top emission type display device. The package substrate is generally used for the package with the array substrate. The color filter layer may be formed on the side of the package substrate adjacent to the array substrate or on the side of the package substrate away from the array substrate.

A method for fabricating a top emission type OLED display device, as shown in FIG. 7, includes:

Step 201: Form an array substrate of a top emission type OLED display device. Specifically, the method includes: selecting a glass substrate as a base substrate, and forming a TFT array, a pixel defining layer, and a pixel electrode on the glass substrate. Its The TFT includes a gate electrode, a gate insulating layer, an active layer, a source, and a drain. The pixel electrode is electrically connected to the source or drain, typically as an anode.

An organic light-emitting functional layer and a cathode are formed on the pixel electrode.

Step 202: Form a package substrate having a color filter layer. Specifically, the method comprises: selecting a glass substrate as a base substrate, and forming a red filter layer, a green filter layer, a blue filter layer, and a white filter layer on the glass substrate.

A white filter pattern of a certain thickness is formed at a position corresponding to the fourth sub-pixel by a wet process such as an inkjet printing process. By way of example, the white filter pattern can have a thickness of 1 micron. And the area of the white filter pattern corresponding to the fourth sub-pixel position may be four-fifths of the fourth sub-pixel area.

Step 203: Encapsulate the array substrate of the formed top emission type OLED display device by using a package substrate. Specifically, the package can be implemented by a laser irradiation process.

When the package is packaged by the package substrate, the side on which the color filter layer is formed may be packaged close to the array substrate, or the side on which the color filter layer is formed may be packaged away from the array substrate.

At this time, the fabrication of the OLED display device is completed, and each pixel in the formed OLED display device may be as shown in FIG.

Of course, the fabrication of the top-emission OLED display device is not limited to the above steps. For example, a black matrix or other thin film or layer structure may be formed on the glass substrate of the package substrate. The embodiment of the present invention is described by way of example only.

It should be noted that, in the description of the present invention, it is to be understood that the orientation or positional relationship of the terms "upper", "lower" and the like is based on the orientation or positional relationship shown in the drawings, only for convenience of description. The invention and the simplification of the description, rather than indicating or implying that the device or component referred to must have a particular orientation, The orientation and construction of the orientation are not to be construed as limiting the invention.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the invention without departing from the spirit and scope of the embodiments of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the embodiments of the invention.

Claims

A substrate for OLED display is applied to an OLED display device, the display device comprising a plurality of pixels, each of the pixels comprising: a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel, the characteristics thereof The display substrate includes a color filter layer, the color filter layer includes at least four filter patterns of different colors, wherein the color filter layer is formed at a position corresponding to the first sub-pixel a red filter pattern having a green filter pattern formed at a position corresponding to the second sub-pixel, and a blue filter pattern formed at a position corresponding to the third sub-pixel, corresponding to the fourth sub-pixel a white filter pattern and a filter pattern of at least one other color other than white and black are formed at the position, and the sum of the luminances of the filter patterns of the colors other than white and black is not It is greater than 20% of the brightness of the fourth sub-pixel.
The display substrate according to claim 1, wherein the filter pattern of at least one other color other than white and black comprises: a red filter pattern, a green filter pattern, and a blue filter. At least one filter pattern in the pattern.
The display substrate according to claim 1, wherein the filter pattern of at least one other color other than white or black includes a red filter pattern and a blue filter pattern.
The display substrate according to claim 3, wherein a luminance of the red filter pattern is not greater than a luminance of the blue filter pattern at a position corresponding to the fourth sub-pixel.
The substrate for display according to claim 4, wherein the luminance of the red filter pattern is not greater than 10% of the luminance of the fourth sub-pixel, and the luminance of the blue filter pattern is not greater than The fourth sub-pixel emits 20% of the luminance.
The display substrate according to claim 4 or 5, wherein an area of the red filter pattern is equal to an area of the blue filter pattern, and a thickness of the red filter pattern is larger than the blue The thickness of the color filter pattern; or,

The thickness of the red filter pattern is equal to the thickness of the blue filter pattern, and the area of the red filter pattern is smaller than the area of the blue filter pattern.
An OLED display device comprising an array substrate and a package substrate, wherein the array substrate or the package substrate is the display substrate according to any one of claims 1 to 6.
The display device according to claim 7, wherein when the array substrate is the substrate for display according to any one of claims 1 to 6, the array substrate further comprises: a first substrate, and a formation a TFT array on the first substrate, a pixel defining layer, a first electrode, a second electrode, and a light emitting functional layer formed between the first electrode and the second electrode, wherein the TFT includes: a gate a gate, a gate insulating layer, an active layer, a source and a drain, the first electrode being electrically connected to the source or the drain.
The display device according to claim 8, wherein the color filter layer is formed between the pixel defining layer and the light emitting function layer.
The display device according to claim 7, wherein when the package substrate is the display substrate according to any one of claims 1 to 6, the array substrate comprises: a first substrate, and is formed on a TFT array on the first substrate, a pixel defining layer, a first electrode, a second electrode, and a light emitting functional layer formed between the first electrode and the second electrode, wherein the TFT comprises: a gate a gate insulating layer, an active layer, a source and a drain, the first electrode being electrically connected to the source or the drain.