TWI615961B - Organic light emitting diode display device - Google Patents

Abstract

An organic light emitting diode display device includes a substrate, a cover layer provided on the substrate, and includes a plurality of microlens structures and an organic light emitting element provided on the cover layer. The organic light emitting element includes a first electrode, an organic light emitting layer, and a second electrode. The microlens structure respectively includes a recess and a protrusion, and the organic light emitting diode display device further includes a reflective pattern disposed in a region corresponding to the recess.

Description

Organic light emitting diode display device

The present invention claims the Korean Patent Application No. 10-2015-0123173 proposed by the Korea Intellectual Property Office on August 31, 2015, and the Korean Patent Application No. 10-2016-0067665 proposed by the Korea Intellectual Property Office on May 31, 2016. The entire contents of which are incorporated in the present invention.

The present invention relates to an organic light emitting diode display device having a scattering structure.

In general, an organic light-emitting diode display device is a self-luminous display device, and it is not necessary to mount an additional light source like a liquid crystal display device, so that a thin and light organic light-emitting diode display device can be manufactured. In addition, the organic light-emitting diode display device has a low driving voltage, which is advantageous for reducing energy consumption, and has excellent color performance, response speed, viewing angle and contrast, in order to use the organic light-emitting diode display device as a display of the next generation. There have been many studies related to organic light-emitting diode display devices.

Light emitted from the organic light-emitting layer of the organic light-emitting diode display device passes through constituent elements of a plurality of display devices and is emitted outside the organic light-emitting diode display device. However, among the light emitted from the organic light-emitting layer, some of the light is confined in the organic light-emitting diode display device and cannot be emitted to the outside. As such, the light extraction efficiency of the organic light emitting diode display device is affected to cause problems.

Specifically, in the bottom emission type organic light emitting diode display device, total reflection or light absorption occurs at the anode, and only about 50% of the light emitted from the organic light emitting layer can be emitted from the organic light emitting layer. Total reflection or light absorption also occurs at the substrate, causing about 30% of the light incident on the substrate to be blocked. In this way, about 80% of the light emitted by the organic light-emitting layer is blocked inside the organic light-emitting diode display device, so that only about 20% of the light emitted by the organic light-emitting layer can be extracted to the organic light-emitting diode display device. Externally, the light extraction efficiency is very low.

In order to improve the light extraction efficiency of the organic light emitting diode display device, one method is to provide a microlens array outside the substrate of the display device or to form a microlens structure on the cover layer of the display device.

However, although a microlens array is disposed outside the substrate or a microlens structure is formed on the cover layer, a large amount of light is blocked inside the display device, and thus the amount of extracted light is still small. In addition, when part of the external ambient light is incident on the microlens array or the microlens structure, the microlens array or the microlens structure reflects the external ambient light, and some of the reflected light can pass through the polarizing plate, thereby making the organic light emitting diode The reflectance of the body display device becomes high. In addition, when light generated by the organic light-emitting layer is incident on the polarizing plate through the substrate, part of the light is reflected by the polarizing plate and returned to the inside of the display device, and the reflected light returning to the inside of the display device may be incident on the micro-adjacent pixel. A lens array or a microlens structure, but the wavelength of light generated by the organic light-emitting layer adjacent to the pixel has a different color expression than the wavelength of the reflected light, thereby causing light leakage.

In view of the above problems, the present invention provides an organic light emitting diode display device which contributes to improving light extraction efficiency, reducing light reflectance, and preventing light leakage.

An organic light emitting diode display device according to an embodiment of the present invention includes a polarizing plate, a substrate disposed on the polarizing plate, a cover layer disposed on the substrate, an organic light emitting element disposed on the cover layer, and a reflective pattern. The cover layer comprises a plurality of microlens structures, and the organic light emitting device comprises a first electrode, an organic light emitting layer and a second electrode. The microlens structure includes a recess and a sidewall surrounding the recess. The reflective pattern is disposed in a region of the organic light emitting diode display device corresponding to the recess. In this embodiment, the width of the reflective pattern may be less than the maximum height of the protrusions of the microlens structure.

In an organic light emitting diode display device according to an embodiment of the present invention, a sidewall surrounding the recess may include a first slope and a second slope. The first ramp and the second ramp extend along a first direction of extension, and the first ramp is configured to form a protrusion of the microlens structure. In this embodiment, the second ramp can be arranged symmetrically with respect to a normal to the horizontal reference plane.

In an organic light emitting diode display device according to an embodiment of the present invention, the polarizing plate may have a polarization axis in a predetermined direction. The light incident on the substrate after passing through the polarizing plate can be reflected by the reflective pattern such that the polarization direction of the light is opposite to the polarization axis of the polarizing plate.

In an organic light emitting diode display device according to an embodiment of the present invention, light incident into a region corresponding to the sidewall of the organic light emitting diode display device may have an incident angle greater than a critical angle of total reflection, and when incident on the polarizing plate It can then be reflected to the reflective pattern at least once.

In an organic light emitting diode display device according to an embodiment of the present invention, light incident into a region corresponding to the sidewall of the organic light emitting diode display device is relative to a reference line perpendicular to a tangent to the first slope or the second slope An incident angle of -30 degrees to 30 degrees, and light meeting the above incident angle condition may be reflected to the reflective pattern at least once.

An organic light emitting diode display device according to an embodiment of the present invention includes a substrate, a cover layer, an organic light emitting element, and a reflective pattern. The cover layer is disposed on the substrate, and the cover layer includes a plurality of microlens structures. The organic light emitting device includes a first electrode, an organic light emitting layer, and a second electrode. The organic light emitting element is disposed on the cover layer, and the organic light emitting element has a curved surface formed according to the shape of the microlens structure, and the microlens structures respectively include a recess and a protrusion. The reflective pattern is disposed in a region of the organic light emitting diode display device corresponding to the recesses.

In an organic light emitting diode display device according to an embodiment of the present invention, the protrusions of the microlens structures separate the recesses.

In an organic light emitting diode display device according to an embodiment of the present invention, the protrusions of the microlens structures are alternately arranged with the recesses.

In an organic light emitting diode display device according to an embodiment of the present invention, the protrusions of the microlens structures each have a slope. The slope is at an angle to a horizontal reference plane and the angle is 40 degrees to 60 degrees or 120 degrees to 140 degrees.

In an organic light emitting diode display device according to an embodiment of the present invention, the cover layer has at least one opening. The protrusions of at least one of the microlens structures comprise two convex portions. The opening separates the two convex portions. The reflective pattern is disposed in a separation space corresponding to the at least one opening, and the separation space corresponds to the recess.

In an organic light emitting diode display device according to an embodiment of the present invention, the organic light emitting diode display device further includes a polarizing plate, and the reflective pattern is disposed between the organic light emitting layer of the organic light emitting device and the polarizing plate.

In an organic light emitting diode display device according to an embodiment of the present invention, the refractive index of the first electrode and the refractive index of the organic light emitting layer are both greater than the refractive index of the cover layer and the refractive index of the substrate.

In an organic light emitting diode display device according to an embodiment of the present invention, the organic light emitting layer is adapted to emit an outgoing light. The emitted light is incident on the polarizing plate and is reflected by the polarizing plate to generate a reflected light, and the reflective pattern is disposed on the optical path of the reflected light.

In an organic light emitting diode display device according to an embodiment of the present invention, the protrusions of the microlens structure respectively include two convex portions, and the width of the reflective pattern is smaller than the distance between the two centers of the two convex portions.

In an organic light emitting diode display device according to an embodiment of the present invention, the width of the reflective pattern is smaller than the distance between the two centers of the two adjacent recesses.

In an organic light emitting diode display device according to an embodiment of the present invention, a reflection pattern is provided between a cover layer and a substrate.

In an organic light emitting diode display device according to an embodiment of the present invention, in a region corresponding to the recesses of the organic light emitting diode display device, the reflective pattern is disposed on a color filter layer, and the color filter layer is disposed on the substrate or an insulation layer. The layer and the substrate or the insulating layer are disposed on a thin film transistor.

In an organic light emitting diode display device according to an embodiment of the present invention, in a region corresponding to the recesses of the organic light emitting diode display device, a reflective pattern is disposed between the cover layer and the first electrode.

In an organic light emitting diode display device according to an embodiment of the present invention, the organic light emitting diode display device further includes a bank layer pattern. The bank layer pattern is disposed between the cover layer and the first electrode, and the bank layer pattern defines a light emitting portion and a non-light emitting portion of the organic light emitting diode display device. The microlens structure is located in a region of the organic light emitting diode display device corresponding to the light emitting portion.

In an organic light emitting diode display device according to an embodiment of the present invention, the microlens structure has a first range corresponding to the recess, a second range corresponding to a sidewall surrounding the recess, and a convex corresponding to the protrusion. A third range of the portion, and the reflective pattern is disposed in a region of the organic light emitting diode display device corresponding to the first range.

An organic light emitting diode display device according to an embodiment of the present invention includes a substrate, a cover layer, an organic light emitting element, and a reflective pattern. The cover layer is disposed on the substrate, and the cover layer has a non-flat surface on a side of the opposite substrate. The organic light emitting device includes a first electrode, an organic light emitting layer, and a second electrode. The organic light emitting element is disposed on the cover layer, and the organic light emitting element has a curved surface formed according to the shape of the uneven surface. The reflective pattern is disposed between the first electrode and the substrate.

According to the OLED display device of the present invention, the reflective pattern is disposed in a region corresponding to the recess of the microlens structure of the organic light emitting diode display device, or is disposed between the first electrode and the substrate. Thereby, it is helpful to reduce the reflectance of the external ambient light, and as the arrangement area of the reflective pattern increases, the magnitude of the decrease in the reflectance is also larger.

In addition, even if the light incident from the inside of the organic light-emitting diode display device has an incident angle larger than the critical angle of the total reflection, the arrangement of the reflective pattern helps to prevent the light from being reflected to the adjacent pixels, thereby preventing light leakage. .

In addition, light having an incident angle of -30 degrees to 30 degrees with respect to a reference line perpendicular to a tangent to a sidewall of the microlens structure may be reflected by the reflective pattern and the microlens structure to be emitted outside the organic light emitting diode display device, and Helps improve light extraction efficiency.

The above description of the disclosure and the following description of the embodiments of the present invention are intended to illustrate and explain the spirit and principles of the invention, and to provide further explanation of the scope of the invention.

The exemplary embodiments are provided below and the invention is described with reference to the accompanying drawings. The drawings are intended to be illustrative of the spirit and scope of the invention, and those skilled in the art will recognize that the invention can be An exemplary embodiment. In addition, the relative sizes and proportions of the elements illustrated in the drawings are enlarged or reduced for clarity and convenience of the drawings, and any size is merely exemplary. The same structures, elements or components illustrated in the two or more drawings are denoted by the same reference numerals to the same or the like.

The various advantages, features, and methods of the present invention are described in detail below through the exemplary embodiments and the accompanying drawings. However, the invention is not limited to the exemplary embodiments disclosed in the specification, but will be implemented in various forms. The exemplified embodiments disclosed in the specification are intended to be fully understood by those of ordinary skill in the art. Therefore, the scope of the invention should be determined by the content of the patent application. Like reference numerals indicate identical elements throughout the specification. The relative sizes and proportions of the elements illustrated in the drawings are for the purpose of clarity and convenience.

When an element that is considered a layer, region or substrate is described as "in another element", it can be placed directly on the other element, or additional elements can be present between the two. In contrast, when an element is described as "directly on another element," there is no additional element in between.

Words related to spatial configuration, such as "under", "below", "lower", "above", "upper", etc., may be used to describe elements and/or features in the figure and another ( Or a plurality of relationships of components and/or features. It will be understood that the words relating to the space are intended to encompass different orientations of the device in use and/or operation in addition to the orientation shown in the figures. For example, elements in the "Bene" and/or "Bottom" of other elements or features will be <RTIgt;

In addition, terms such as "first", "second", "A", "B", "(a)", "(b)" may be used to simply refer to different individual elements of a plurality of elements. , but does not indicate any order or order.

FIG. 1 is a schematic structural view of a display according to an embodiment of the invention. Referring to FIG. 1, a display 1000 includes a display panel 1100, a data driver 1200, a gate driver 1300, and a timing controller 1400. The display panel 1100 is provided with a plurality of sub-pixels, a plurality of data lines DL1 to DLm, and a plurality of gate lines GL1 to GLn. The data driver 1200 is for driving the data lines DL1 to DLm, and the gate driver 1300 is for driving the gate lines GL1 to GLn. The timing controller 1400 is used to control the data driver 1200 and the gate driver 1300.

The data driver 1200 supplies a data voltage to drive the data line. In addition, the gate driver 1300 supplies scan signals to the gate lines to sequentially drive the gate lines.

In addition, the timing controller 1400 supplies control signals to the data driver 1200 and the gate driver 1300 to control the data driver 1200 and the gate driver 1300. The timing controller 1400 starts scanning according to the timing executed in the frame, and converts the input image data input from the outside according to the data signal format used by the data driver 1200, and then outputs the converted image data. The timing controller 1400 controls the transmission and driving of the data at an appropriate timing according to the scan result.

The gate driver 1300 sequentially supplies the scan signals of the turn-on voltage or the turn-off voltage to the gate lines according to the timing controller 1400 to sequentially drive the gate lines. Further, the gate driver 1300 may be disposed only on one side of the display panel 1100. Depending on the driving mode, design type, and the like of the display panel, in some cases, the gate driver 1300 may be disposed on both sides of the display panel 1100. FIG. 1 illustrates an example in which the gate driver 1300 is disposed on one side of the display panel 1100, but the invention is not limited thereto.

The gate driver 1300 can include at least one gate drive integrated circuit. The gate driving integrated circuit is connected to the bonding pad of the display panel 1100 via Tape Automatic Bonding or Chip on Glass; or the gate driving integrated circuit is built in via the panel. (Gate in Panel) is directly disposed on the display panel 1100. In some cases, the gate driving integrated circuit may be integrated and disposed on the display panel 1100.

In addition, a gate drive integrated circuit can be provided by chip on film. In this case, the gate driving wafer corresponding to the gate driving integrated circuit is mounted on the flexible film, and one end of the flexible film is bonded to the display panel 1100.

The data driver 1200 converts the image data received from the timing controller 1400 into an analog type data voltage, and the specified gate line is turned on to supply the converted data voltage to the data line, thereby driving the data line. The data driver 1200 includes at least one source drive integrated circuit for driving the data lines.

The source driving integrated circuit is connected to the bonding pad of the display panel 1100 via a tape-type automatic bonding or flip-chip bonding. In some cases, the source driving integrated circuit may be integrated and disposed on the display panel 1100.

In addition, the source driving integrated circuit can be set by using a flip chip technology. In this case, the source driving wafer corresponding to the source driving integrated circuit is mounted on the flexible film, and one end of the flexible film is bonded to the at least one source printed circuit board, and the other end is bonded to the display panel 1100. .

The source printed circuit board is connected to the control printed circuit board via a connection medium such as a Flexible Flat Cable (FFC) or a Flexible Printed Circuit (FPC). The timing controller 1400 is disposed within the control printed circuit board.

In addition, the control printed circuit board may further include a power controller (not shown) for supplying voltage or current to the display panel 1100, the data driver 1200, the gate driver 1300, or the like, or controlling the voltage supplied to the components. Size or current size. The source printed circuit board and the control printed circuit board described above can form a complete printed circuit board.

Meanwhile, the pixel mentioned in the present invention contains at least one pixel. A sub-pixel is a unit having a specific type of color filter, or an organic light-emitting element that can emit a specific color without relying on a color filter. The colors that the sub-pixels can express include red, green, blue, and optionally white, but the invention is not limited thereto. Each sub-pixel can include one or more organic light-emitting diode display devices.

In addition, in each sub-pixel of the display panel, an electrode connected to the thin film transistor for controlling the light emission is referred to as a first electrode, and electrodes disposed on all surfaces of the display panel or at least two pixel regions are It is called the second electrode. When the first electrode is an anode, the second electrode is a cathode; conversely, when the first electrode is a cathode, the second electrode is an anode. The following description takes the case where the first electrode is used as the anode and the second electrode is used as the cathode, but the invention is not limited thereto.

In addition, a monochrome color filter may be provided in the aforementioned sub-pixel area. The color filter can convert monochromatic light having a large wavelength wave width emitted from the organic light emitting element into monochromatic light having a predetermined wavelength of a small wavelength width. Furthermore, a light scattering layer is disposed in each sub-pixel area to improve light extraction efficiency. The light scattering layer may be a microlens array, a nano pattern, a diffusion film pattern or cerium oxide beads.

Hereinafter, the microlens array is described as an example of a light scattering layer, but the exemplary embodiments of the present invention are not limited thereto, and may be combined with other different light scattering structures.

2 is a schematic cross-sectional view showing an organic light emitting diode display device according to an embodiment of the invention. Referring to FIG. 2, an organic light emitting diode display device of the bottom emission type includes a thin film transistor Tr, and the thin film transistor Tr includes an active layer 102, a gate electrode 104, a source electrode 106, and a drain electrode. 107. The OLED display device further includes an organic light emitting element EL electrically connected to the thin film transistor Tr, and the organic light emitting element EL includes a first electrode 111, an organic light emitting layer 113, and a second electrode 114.

In detail, the organic light emitting diode display device further includes a substrate 100 and a buffer layer 101 disposed on the substrate 100, and the thin film transistor Tr further includes a gate insulating layer 103 and an interlayer insulating layer 105. The active layer 102 of the thin film transistor Tr is disposed on the buffer layer 101. The gate insulating layer 103 and the gate electrode 104 of the thin film transistor Tr are both disposed on the active layer 102, and the interlayer insulating layer 105 is disposed on the gate electrode 104.

The source electrode 106 and the drain electrode 107 that are in contact with the active layer 102 are disposed on the interlayer insulating layer 105 via a contact hole formed in the interlayer insulating layer 105. A protective layer 108 of the organic light emitting diode display device is disposed on the source electrode 106 and the drain electrode 107. A color filter layer 109 of the organic light emitting diode display device may be disposed on a surface of the protective layer 108.

The organic light emitting diode display device further includes a cover layer 190 disposed on the substrate 100 and the color filter layer 109. The first electrode 111 of the organic light emitting element EL is disposed on the cap layer 190 and is connected to the drain electrode 107 of the thin film transistor Tr. The organic light emitting diode display device further includes a bank layer pattern 112 disposed on the cover layer 190, and the bank layer pattern 112 exposes a portion of the upper surface of the first electrode 111. The bank pattern 112 defines a light emitting portion and a non-light emitting portion of the organic light emitting diode display device. The organic light-emitting layer 113 of the organic light-emitting element EL is partially disposed on a portion of the upper surface of the exposed portion of the first electrode 111, and the other portion of the organic light-emitting layer 113 is disposed on the bank pattern 112. The second electrode 114 of the organic light emitting element EL is disposed on the organic light emitting layer 113.

In this embodiment, the first electrode 111 may be a transparent conductive material, and the second electrode 114 may be an opaque conductive material. Further, the second electrode 114 may be an opaque conductive material having a high light reflectivity. Therefore, the bottom light-emitting type organic light-emitting diode display device can be implemented.

The organic light emitting diode display device further includes a polarizing plate 110 disposed on the back surface of the substrate 100. The polarizing plate 110 may have a polarization axis of a predetermined direction, and thus only polarized light having the same direction as the polarization axis can be incident on the back surface of the substrate 100 through the polarizing plate 110. In addition, FIG. 2 illustrates a single-layer polarizing plate 110 as an example, but the invention is not limited thereto. In other embodiments, the polarizer 110 can be multiple layers.

In the bottom emission type organic light emitting diode display device of FIG. 2, in order to enhance the light extraction effect, the cover layer is designed to include a plurality of protrusions and a plurality of depressions. However, designing the cover layer in this way causes the light extraction efficiency of the protrusion position and the recessed position to be different, and also has problems such as high reflectance and severe light leakage.

The following description solves the above problems by providing an exemplary embodiment of the present invention, which improves the light extraction efficiency of the organic light emitting diode display device and reduces the organic light emitting diode display device by providing a reflective pattern overlapping the cover layer. The light reflectance and the prevention of light leakage by the organic light emitting diode display device.

3 is a top plan view of an organic light emitting diode display device according to another embodiment of the present invention. Referring to FIG. 3, in an exemplary embodiment of the present invention, the cover layer includes a plurality of microlens structures, and each of the microlens structures has a first range 150, a second range 160, and a third range 155.

The first range 150 may be a region of the organic light emitting diode display device corresponding to the recess of the microlens structure, and the second range 160 may be a region of the organic light emitting diode display device corresponding to a sidewall surrounding the recess, and the third range 155 may be a region of the organic light-emitting diode display device corresponding to a convex portion of the protrusion of the microlens structure. The thickness of the organic light-emitting layer 113 located in the first range 150 and the third range 155 may be greater than the thickness of the organic light-emitting layer 113 located in the second range 160. That is, the first range 150, the second range 160, and the third range 155 can be distinguished according to the thickness of the organic light-emitting layer 113 disposed in the microlens structure. In this embodiment, the organic light emitting diode display device further includes a reflective pattern overlapping the microlens structure.

In addition, referring to FIG. 3, in the region corresponding to the microlens structure, the sidewall of the microlens structure is a recess that surrounds the microlens structure in a circular shape, but the invention is not limited thereto. In other embodiments, the sidewalls of the microlens structure may be recesses that surround the microlens structure in a hexagonal or elliptical shape.

The structure of the microlens structure is as shown in FIG. 4 is a cross-sectional view of the organic light emitting diode display device of FIG. 3 taken along line A-B.

FIG. 4 is a schematic diagram for describing an arrangement relationship between the cover layer 190 and the reflective pattern 120. The present embodiment is exemplified by the fact that the reflective pattern 120 and the cover layer 190 are both disposed on the substrate 100. The cover layer 190 has a non-flat surface with respect to one side of the substrate 100, and the reflective pattern 120 is disposed between the non-flat surface and the substrate 100. In the present embodiment, the cover layer 190 includes a plurality of microlens structures 180 disposed on a non-planar surface. Each of the microlens structures 180 can include a recess and a protrusion, and the protrusions can be alternately disposed with the recesses, and thus the microlens structures 180 can be wavy. The microlens structure 180 has a plurality of first ranges 150 corresponding to the recesses, respectively.

The reflective pattern 120 may be disposed in a region of the organic light emitting diode display device corresponding to the first range 150. The thin film transistor and the color filter layer of the organic light emitting diode display device may be disposed on the substrate 100. An insulating layer may be disposed on the thin film transistor and the color filter layer, and the reflective pattern 120 may be disposed on the insulating layer. Thereby, the light generated by the organic light emitting element EL can be reflected by the reflective pattern 120 to be emitted to the outside of the substrate 100. The optical path of the light reflected by the reflective pattern 120 and the technical effects presented will be further described in Figures 9-11.

Further, in a region where the microlens structure corresponds to the light emitting portion of the organic light emitting diode display device, the main light emitting phenomenon is a region from which the organic light emitting element EL corresponds to the second range 160 and the third range 155.

In a region where the organic light emitting diode display device corresponds to the second range 160, the light emitted from the organic light emitting element EL is incident on the slope of the microlens structure at an incident angle, and the incident angle is approximately equal to the total reflection critical angle (about 42 degrees), so the light will produce multiple total reflections on the slope of the microlens structure, thereby improving the light extraction efficiency. In addition, in the region where the organic light emitting diode display device corresponds to the second range 160, the thickness of the organic light emitting layer 113 is the thinnest, so the current density in the second range 160 is high, thereby improving the organic content in the second range 160. The luminous efficiency of the light-emitting element EL.

In a region where the organic light emitting diode display device corresponds to the third range 155, the thickness of the organic light emitting layer 113 is greater than the thickness in the second range 160, so the current density in the third range 155 is lower, but the microlens structure is transmitted. The third range 155 still has a high light extraction efficiency.

Therefore, the illuminating phenomenon of the organic light emitting diode display device mainly occurs in the second range 160 and the third range 155 of the microlens structure, and the reflective pattern 120 in the embodiment is not disposed in the second range 160 and the third range. Within 155. That is, only in the region where the organic light emitting diode display device corresponds to the first range 150, the light emitting phenomenon rarely occurs, and the reflective pattern 120 may be disposed in the region corresponding to the first range 150.

Thereby, the light incident at the critical angle of the total reflection or the light emitted from the main light-emitting regions (the second range 160 and the third range 155) transmits an additional reflection phenomenon through the reflection pattern 120, and the increase is extracted to the outside of the substrate 100. The amount of light. In other words, in the region where the organic light-emitting diode display device corresponds to the first range 150 in which the light-emitting phenomenon rarely occurs, the reflective pattern 120 is disposed therein, and thus the light extraction efficiency can be improved via the additional reflection phenomenon.

Further, the width d1 of the reflective pattern 120 may be smaller than the distance D1 between the two centers of the recesses of each of the two adjacent microlens structures 180. The width d1 of the reflective pattern 120 is smaller than the distance D1, and helps to enhance the light extraction effect through the microlens structure 180.

In an embodiment of the invention, the protrusion of each microlens structure 180 may include two convex portions, and the adjacent two convex portions are located on opposite sides of the concave portion. The width d1 of the reflective pattern 120 may be less than the distance D11 between the two centers of the two convex portions.

In detail, if the width d1 of the reflective pattern 120 is greater than the distance D1 or the distance D11, the path of light that should originally be extracted from the microlens structure 180 to the outside of the substrate 100 may change, eventually resulting in the extraction to the substrate 100. The outside light is blocked inside the unit. That is, if the width d1 of the reflective pattern 120 is greater than the distance D1 or the distance D11, the amount of light blocked inside the device may increase, and the light extraction efficiency may be lowered.

The reflective pattern 120 may be a metal material. For example, the material of the reflective pattern 120 may be selected from the group consisting of silver (Ag), copper (Cu), gold (Au), tin (Sn), and aluminum (Al), but the material of the reflective pattern 120 is not Limited. In an exemplary embodiment of the present invention, the material of the reflective pattern 120 may be selected as long as the required material having a sufficiently high light reflectance is satisfied.

The microlens structure 180 has a ramp 130 and a ramp 140, and the ramps 130, 140 can collectively form a sidewall surrounding the recess. In the present embodiment, the ramps 130, 140 extend along the first direction A1 and the second direction A2, respectively, to form protrusions of the microlens structure 180. The cover layer 190 includes the above-described microlens structure 180 and can be blocked from being extracted inside the organic light emitting diode display device to the outside of the substrate 100, thereby improving luminous efficiency.

The slopes 130, 140 of the microlens structure 180 have an angle with a horizontal reference plane S, and the angle of the angle may be 40 degrees to 60 degrees or 120 degrees to 140 degrees.

Thereby, the light extraction efficiency of the microlens structure can be improved. In particular, due to the tilt angle of the depressed slopes 130, 140 surrounding the microlens structure 180, light generated from the organic light emitting element EL may undergo multiple total reflections, thereby contributing to increased emission to the organic light emitting diode display device. The amount of external light.

Further, the shape of the microlens structure 180 is not limited to the aspect illustrated in FIG. The microlens structure 180 can have a shape as illustrated in FIG. 5 or 6. FIG. 5 is a schematic cross-sectional view showing an organic light emitting diode display device according to still another embodiment of the present invention. FIG. 6 is a schematic cross-sectional view showing an organic light emitting diode display device according to still another embodiment of the present invention.

In other exemplary embodiments of the present invention, the organic light emitting diode display device may include an element having the same structural composition as the above-described exemplary embodiment. Elements having the same structural composition will not be repeatedly described, and thus will be omitted below. Further, the same or similar elements have the same or similar reference numerals.

In the present embodiment, the difference from the foregoing embodiment is that the full width at half maximum F2 of the microlens structure 280 as shown in FIG. 5 is smaller than the full width F1 of the half height of the microlens structure 180 illustrated in FIG. The full width at half maximum of the microlens structure can be defined as the width of the protrusion of the microlens structure at half the height. In the process of forming the microlens structure, the full width at half maximum of the microlens structure may depend on the amount of exposure of the cover layer, the material of the cover layer, and other related factors.

Moreover, each microlens structure 280 can include a recess and two ramps 230, 240 that collectively surround the recess. The slopes 230, 240 and a horizontal reference surface S may have an angle, and the angle of the angle may be 40 degrees to 60 degrees, or 120 degrees to 140 degrees.

However, as shown in FIGS. 4 and 5, the full width at half maximum F1 of the microlens structure 180 is greater than the full width F2 of the half height of the microlens structure 280, so that the slopes of the slopes 130, 140 surrounding the recess of the microlens structure 180 in FIG. 4 may be less than The slope of the depressed slopes 230, 240 surrounding the microlens structure 280 in FIG.

Therefore, by controlling the exposure amount of the cover layer, the material selection of the cover layer, and other related factors, the shape of the microlens structure in the exemplary embodiment of the present invention can be freely adjusted to achieve the desired desired light extraction effect. .

In addition, in FIG. 5, the reflective pattern 120 may be disposed in a region of the organic light emitting diode display device corresponding to the first range 250 of the microlens structure 280. The width d2 of the reflective pattern 120 may be less than the distance D2 between the two centers of the two recesses of the two adjacent microlens structures 280.

In FIG. 6, a plurality of microlens structures 380 may be disposed on the substrate 100 and separated from each other along a cut plane of the organic light emitting diode display device. Each microlens structure 380 can include a recess and two ramps 330, 340, and the ramps 330, 340 collectively surround the recess of the microlens structure 380. The slopes 330, 340 and a horizontal reference surface S may have an angle, and the angle of the angle may be 40 degrees to 60 degrees, or 120 degrees to 140 degrees.

In FIG. 6, these microlens structures 380 are separated from one another, and a separation space E is formed between adjacent two of the microlens structures 380.

In an embodiment of the invention, the cover layer has at least one opening 191. As shown in FIG. 6, the cover layer has a plurality of openings 191. The protrusion of each microlens structure 380 includes two convex portions, and these openings 191 separate the convex portions, respectively. The reflective pattern 120 is disposed in the separation space E corresponding to the opening 191, and the separation space E corresponds to the recess of the microlens structure 380.

The microlens structure 380 can be formed on the cover layer through the reticle, and a separation space E is formed between the lenticular structures 380, and the width of the separation space E can be determined according to the pitch of the reticle pattern and the exposure amount in the process. .

In detail, the microlens structure pattern for forming the microlens structure 380 in the cover layer is disposed in the photomask to be separated. When the separation distance between the microlens structure patterns on the photomask is large, the width of the partition space E formed between the microlens structures 380 is wider. If the exposure amount in the process is increased, the width of the partition space E formed will be wider.

In this embodiment, the width of the separation space E between the adjacent microlens structures 380 may be greater than the distance between the two depressions of the adjacent microlens structure 380 (ie, the width D3 of the protrusions of the microlens structure 380). Still small. Thereby, it helps to enhance the light extraction effect.

In addition, the reflective pattern 120 may be disposed in a region corresponding to the separation space E between the microlens structures 380. The reflective pattern 120 is disposed in the separation space E between the microlens structures 380, so that even if a color filter layer (not shown) is exposed from the separation space E, the reflective pattern 120 can be disposed on the exposed color filter layer. The color filter layer is prevented from being exposed to the outside. Thereby, it helps to prevent outgassing caused by the color filter layer.

In the present embodiment, the width d3 of the reflective pattern 120 may be smaller than the width D3 of the protrusion of the microlens structure 380. Thereby, it is helpful to enhance the light extraction effect of the reflective pattern 120.

In the organic light emitting diode display device disclosed in the present invention, micro patterns having different shapes may be applied.

The following detailed description is viewed from a cross-sectional schematic view in which a plurality of microlens structures and a plurality of reflection patterns are applied to an organic light emitting diode display device. FIG. 7 is a schematic cross-sectional view showing an organic light emitting diode display device according to still another embodiment of the present invention.

As shown in FIG. 7, in the organic light emitting diode display device of the present embodiment, a plurality of microlens structures 180 are formed on the cover layer 190, and the microlens structures 180 can be disposed with the color filter layer 109 disposed on the protective layer 108. Overlapping.

Further, these microlens structures 180 may be disposed in the light emitting portion and the non-light emitting portion defined by the bank layer pattern 112. In the present embodiment, the microlens structures 180 are disposed only in the region where the organic light emitting diode display device corresponds to the light emitting portion for extracting the light emitted from the organic light emitting element EL to the outside of the substrate 100. That is, these microlens structures 180 are only disposed in areas that are required for light extraction. Therefore, it helps to improve light extraction efficiency. In addition, these reflective patterns 120 may be disposed on the color filter layer 109 to correspond to the recesses of the microlens structure 180.

The first electrode 111 of the organic light emitting element EL is disposed on the cap layer 190 and is connected to the drain electrode 107 of the thin film transistor Tr. In the present embodiment, the first electrode 111 may be formed according to the form of the cover layer 190. That is, the first electrode 111 includes a plurality of recesses and a plurality of protrusions, and the protrusions and the recesses are alternately disposed in the region of the organic light emitting diode display device corresponding to the microlens structure 180 formed in the cover layer 190.

Further, the organic light-emitting layer 113 and the second electrode 114 of the organic light-emitting element EL are disposed on the first electrode 111. The organic light-emitting layer 113 and the second electrode 114 respectively include a plurality of recesses and a plurality of protrusions, and the protrusions and the recesses are alternately disposed in the region of the organic light-emitting diode display device corresponding to the microlens structure 180 formed in the cover layer 190. That is, the reflective pattern 120 may be disposed in a region of the organic light emitting diode display device corresponding to the recess of the first electrode 111, the second electrode 114, and the organic light emitting layer 113. The reflective pattern 120 may be disposed in a region of the recessed portion of the organic light emitting diode display device corresponding to the microlens structure 180 in the light emitting portion (without the bank layer pattern 112).

In addition, FIG. 7 illustrates a microlens structure employed in the organic light emitting diode display device of an exemplary embodiment, but the invention is not limited thereto. The organic light emitting diode display device may employ the microlens structure mentioned in the foregoing other exemplary embodiments.

Referring to Figure 8, the position of the reflective pattern in another exemplary embodiment is described below. FIG. 8 is a schematic cross-sectional view showing an organic light emitting diode display device according to still another embodiment of the present invention. The organic light emitting diode display device illustrated in FIG. 8 may include an element having the same structural composition as the above-described exemplary embodiment. Elements having the same structural composition will not be repeatedly described, and thus will be omitted below. Further, the same or similar elements have the same or similar reference numerals.

As shown in FIG. 8, the organic light emitting diode display device in this embodiment includes a reflective pattern 220. The reflective pattern 220 is disposed in a region of the organic light emitting diode display device corresponding to the recess of the cover layer 290, and may be disposed between the cover layer 290 and the first electrode 211. That is, in the region corresponding to the recess of the cover layer 290, the reflective pattern 220 is disposed on the cover layer 290, and the reflective pattern 220 may be disposed under the first electrode 211.

The following steps can determine the position of the reflective pattern 220. First, the cover layer 290 is formed together with the microlens structure. Thereafter, a metal layer is formed on the cap layer 290, and a photoresist layer is formed on the metal layer. In addition, the form of the reflective pattern 220 is defined by the wet etched metal layer, and the reflective pattern 220 is formed in a region corresponding to the recess of the cover layer 290.

In the present embodiment, the reflective patterns 220 are disposed on the cover layer 290 to prevent the microlens structures from forming irregularities due to moisture, impurities, and other related factors generated in the exposure process for forming the reflective patterns 220. In detail, in the present embodiment, the cover layer 290 including these microlens structures is formed before the reflective pattern 220 is formed, and the microlens structure is prevented from being formed due to impurities generated in the process of forming the reflective pattern 220. Regular form.

Meanwhile, the recess of the cover layer 290 of the present embodiment may be formed flatly compared to the recess of the cover layer 290 illustrated in FIG. 4, but the invention is not limited thereto. In addition, the first electrode 111, the organic light-emitting layer 113, and the second electrode 114 are formed in a recessed shape in a region corresponding to the recess and the reflective pattern 220 of the cover layer 290, as shown in FIG. The first electrode 211, the organic light-emitting layer 213, and the second electrode 214 disposed on the reflective pattern 220 may be formed flat, but the invention is not limited thereto.

The organic light emitting diode display device disclosed in the invention helps to improve light extraction efficiency, reduce light reflectance and prevent light leakage. Please refer to FIG. 9 to FIG. 11 for related description.

FIG. 9 is a schematic diagram of reducing the reflectance of an organic light emitting diode display device according to an embodiment of the invention. For convenience of explanation, the organic light-emitting diode display device described below mainly includes an embodiment in which the reflective pattern 120 is disposed under the cover layer 190. In other embodiments, the reflective pattern 120 can be disposed over the cover layer 190, but the effect of reducing the reflectance can also be achieved according to the techniques described below. As shown in FIG. 9 , a plurality of reflective patterns 120 and a plurality of microlens structures 180 of the cover layer 190 are disposed on the substrate 100 . Further, the polarizing plate 110 is disposed on the substrate 100, and the polarizing plate 110 may include a polarizing layer that overlaps a polarization axis having a predetermined direction and another polarizing layer having a predetermined retardation value.

When the external ambient light 500 is incident on the back surface of the substrate 100 through the polarizing plate 110, the polarizing plate 110 allows only light of the same polarization direction as the polarization axis to pass. Further, polarized light having such a polarization direction is circularly polarized by a polarizing layer having a predetermined retardation amount, and then transferred to the substrate 100. The light transmitted to the house of the organic light emitting diode display device is reflected by the second electrode 114 of the organic light emitting element EL, and the reflected light generates a phase retardation of 180 degrees with respect to the polarized light passing through the polarizing plate 110. The reflected light that generates the phase delay is incident on the substrate 100 in a traveling direction opposite to the originally incident light.

Meanwhile, the plurality of microlens structures 180 of the cover layer 190, the first electrodes 111 of the organic light emitting elements EL, the organic light emitting layer 113, and the second electrodes 114 also include a plurality of protrusions and a plurality of recesses alternately disposed. The second electrode 114 reflects the light incident from the substrate 100, and thus the polarization axis of the partially reflected light is converted to be opposite to the polarization axis of the polarizing plate 110.

However, since the second electrode 114 is not flat, when the second electrode 114 reflects the light incident from the substrate 100, some of the reflected light still has the same polarization direction as the polarization axis of the polarizing plate 110, and can pass through the polarizing plate 110. It is emitted to the outside of the substrate 100. Therefore, the reflectance of the organic light emitting diode display device increases.

In the present embodiment, the reflective pattern 120 is disposed in a region of the organic light emitting diode display device corresponding to the recess of the microlens structure 180, and is also disposed on the cover layer 190. The reflective pattern 120 may also be disposed on an insulating layer of the thin film transistor or a color filter layer on the substrate 100. Under such a configuration, when the external ambient light 500 passes through the polarizing plate 110 so that polarized light satisfying certain conditions can enter the inside of the organic light emitting diode display device, the polarized light is reflected by the reflective pattern 120, and the reflected light is reflected along The opposite direction is advanced toward the substrate 100.

The light reflected by the reflective pattern 120 advances toward the substrate 100 and is incident on the polarizing plate 110 having a specific polarization axis and a specific retardation value. However, since the polarization direction of the reflected light is converted, the polarization direction of the reflected light becomes opposite to the polarization axis of the polarizing plate 110.

Thereby, the light reflected by the reflective pattern 120 is blocked by the polarizing plate 110 and cannot be emitted to the outside of the substrate 100. That is, in the region where the reflective pattern 120 is disposed, the reflectance caused by the external ambient light 500 can be reduced.

In other words, in the present embodiment, the reflective pattern 120 is disposed in a region of the organic light emitting diode display device corresponding to the recess of the microlens structure 180 to prevent high reflectivity caused by the external ambient light 500. Thereby, the organic light emitting diode display device of the present embodiment contributes to reducing the reflectance of the external ambient light, and as the arrangement area of the reflective pattern increases, the magnitude of the decrease in the light reflectance is also greater.

Next, the organic light emitting diode display device disclosed in the present invention is described to prevent light leakage. FIG. 10 is a schematic diagram of an organic light emitting diode display device for preventing light leakage according to an embodiment of the invention. For convenience of explanation, the organic light-emitting diode display device described below mainly includes an embodiment in which the reflective pattern 120 is disposed under the cover layer 190. In other embodiments, the reflective pattern 120 may be disposed over the cover layer 190, but the effect of preventing light leakage may also be achieved according to the technical means described below.

As shown in FIG. 10, a plurality of reflective patterns 120, a cover layer 190 including a plurality of microlens structures 180, and an organic light emitting element EL are disposed on the substrate 100. In the present embodiment, the refractive index of the first electrode 111 of the organic light-emitting element EL and the refractive index of the organic light-emitting layer 113 may be greater than the refractive index of the substrate 100 and the refractive index of the cover layer 190. For example, the refractive index of the substrate 100 and the cap layer 190 is about 1.5, and the refractive index of the first electrode 111 and the organic light-emitting layer 113 of the organic light-emitting element EL may be 1.7 to 2.0.

In this embodiment, the light emitted by a portion of the organic light-emitting layer 113 is reflected by the second electrode 114 toward the first electrode 111, and the light emitted by the other portion of the organic light-emitting layer 113 passes through the first electrode 111 toward the substrate. 100 forward. That is to say, most of the light emitted from the organic light-emitting layer 113 is advanced toward the first electrode 111 to be incident on the substrate 100.

Since the refractive index of the first electrode 111 is the same as or similar to the refractive index of the organic light-emitting layer 113, the path of the light emitted from the organic light-emitting layer 113 does not change at the boundary between the first electrode 111 and the organic light-emitting layer 113. Meanwhile, in the process of light passing through the first electrode 111, since the refractive index difference between the first electrode 111 and the cover layer 190 is large, light having an incident angle equal to or greater than the critical angle of total reflection may be at the first electrode 111 and covered. Total reflection occurs at the junction of layer 190.

The light that is totally reflected at the boundary between the first electrode 111 and the cover layer 190 is reflected by the second electrode 114 and finally can be incident on the substrate 100 having the same or similar refractive index as the cover layer 190, and reaches the polarizer through the substrate 100. 110. The polarizing plate 110 reflects the light again, and advances the reflected light toward the substrate 100. A part of the reflected light that is advanced toward the substrate 100 reaches the microlens structure of the adjacent pixel, and the adjacent pixels emit light having different wavelengths of light or different light colors, thereby causing light leakage.

In the present embodiment, the reflective pattern 120 is disposed in a region of the organic light emitting diode display device corresponding to the recess of the microlens structure 180, and the reflective pattern 120 is disposed on the cover layer 190. Thereby, it is helpful to prevent light having an incident angle larger than the total reflection critical angle a from being reflected by the polarizing plate 110 to be incident on the microlens structure 180 of the adjacent pixel.

In detail, the light emitted from the organic light-emitting layer 113 is totally reflected when it reaches the boundary between the first electrode 111 and the cover layer 190. When the incident angle is larger than the total reflection critical angle a, when the light is incident on the boundary between the substrate 100 and the polarizing plate 110 through the cover layer 190 and the substrate 100, the light is reflected again toward the substrate 100.

Thereafter, the path is changed so that the light traveling toward the substrate 100 reaches the reflective pattern 120 provided on the substrate 100 again through the substrate 100. The light that reaches the reflective pattern 120 is again reflected by the reflective pattern 120 and changes toward the polarizing plate 110, and the light that reaches the polarizing plate 110 is reflected again through the substrate 100, thereby reaching the other reflective pattern 120.

That is to say, the light having an incident angle larger than the total reflection critical angle a reaches the polarizing plate 110 and is reflected, and is again reflected by the reflective pattern 120 at least once to be blocked in the substrate 100. Thereby, light having an incident angle greater than the critical angle a of total reflection is confined within the substrate 100.

According to the organic light emitting diode display device of the exemplary embodiment of the present invention, even in the case where the incident angle of light is larger than the total reflection critical angle a, the light does not reach the microlenses of the other pixels through the arrangement of the reflective pattern 120. Structure 180 helps to prevent light leakage.

Next, the organic light emitting diode display device disclosed in the present invention is described to improve light extraction efficiency. FIG. 11 is a schematic diagram showing an improvement of light extraction efficiency of an organic light emitting diode display device according to an embodiment of the invention. For convenience of explanation, the organic light-emitting diode display device described below mainly includes an embodiment in which the reflective pattern 120 is disposed under the cover layer 190. In other embodiments, the reflective pattern 120 may be disposed over the cover layer 190, but the effect of improving light extraction efficiency may also be achieved according to the technical means described below.

As shown in FIG. 11, in the present embodiment, a plurality of reflective patterns 120, a cover layer 190 including a plurality of microlens structures 180, and an organic light emitting element EL are disposed on the substrate 100.

The microlens structure 180 is divided into a first range 150, a second range 160, and a third range 155, and the light extraction efficiency is higher in the second range 160. The organic light-emitting layer 113 is formed according to the morphology of the cover layer 190, and the thickness of the organic light-emitting layer 113 is the thinnest in the region corresponding to the second range 160, so the organic light-emitting layer 113 has a higher current density corresponding to the portion of the second range 160. . Therefore, a strong electric field is applied to the second range 160, and the luminescence phenomenon of the organic light emitting element EL mainly occurs in a region corresponding to the second range 160.

Further, since the microlens structure 180 includes the slope formed at the second range 160, the organic light emitting element EL has the highest light extraction efficiency at the portion corresponding to the second range 160. For example, when the microlens structure 180 includes a recess and two slopes 130, 140 surrounding the recess and extending in the first direction A1 and the second direction A2, respectively, the light emitted by the organic light emitting element EL is incident on the microlens structure. The slopes 130, 140 of the second range 160 of 180 are scattered, and the amount of light extracted to the outside of the substrate 100 can be increased.

For example, light emitted by the organic light emitting element EL may be incident on the slope 140 of the microlens structure 180 and have -30 degrees to -90 degrees or 30 degrees to 90 degrees with respect to the reference line N perpendicular to the tangent to the slope 140. The incident angle light is scattered at the slopes 130, 140 and can be extracted to the outside of the substrate 100.

However, light having an incident angle of -30 degrees to 30 degrees with respect to the reference line N perpendicular to the tangent to the slope 140 cannot be incident on the slopes 130, 140, so that scattering cannot be generated without being extracted to the outside of the substrate 100, and Blocked inside the organic light emitting diode display device.

In the organic light emitting diode display device of the present embodiment, the reflective pattern 120 is disposed in a region of the organic light emitting diode display device corresponding to the recess of the microlens structure 180, and the reflective pattern 120 is disposed on the cover layer 190, which is helpful. Improve light extraction efficiency.

In detail, based on the reference line N perpendicular to the straight line representing the inclination of the slope 140, among the light emitted from the organic light emitting element EL, light having an incident angle of -30 to 30 degrees with respect to the reference line N is incident on the setting. The reflective pattern 120 corresponds to a region of the recess of the microlens structure 180.

Light incident on the reflective pattern 120 is reflected, and the reflected light is incident on the other microlens structure 180 adjacent to the microlens structure 180 described above. Therefore, more light emitted from the organic light emitting element EL can be extracted to the outside of the substrate 100.

With the above configuration, light having an incident angle of -30 degrees to 30 degrees with respect to the reference line N perpendicular to the tangent to the slope 140 may be incident on the reflective pattern 120 at least once and reflected by the reflective pattern 120. Thereby, the original incident angle is -30 degrees to 30 degrees, and after the light is reflected by the reflective pattern 120, the light path changes to have an incidence of -30 degrees to -90 degrees or 30 degrees to 90 degrees with respect to the reference line. The corners can be extracted to the outside of the substrate 100.

In the above exemplary embodiment, the effect of the reflection pattern 120 on the light extraction efficiency is mainly explained by taking the light incident to the slope 140 of the microlens structure 180 as an example, but the invention is not limited thereto. Light incident on the slope 130 of the microlens structure 180 may also be extracted to the outside of the substrate 100 by providing the reflective pattern 120.

In the organic light emitting diode display device disclosed in the present invention, light having an incident angle of -30 degrees to 30 degrees with respect to the reference line N perpendicular to the tangent to the slopes 130, 140 is incident on the reflective pattern 120 and is reflected by the reflective pattern. 120 reflections. Thereby, after the incident angle is -30 degrees to 30 degrees, the light path is changed and can be extracted to the outside of the substrate 100 after being reflected by the reflective pattern 120, thereby improving the light extraction efficiency.

As described above, in the organic light emitting diode display device disclosed in the present invention, the organic light emitting diode display device includes a reflective pattern. The reflective pattern is disposed in a region corresponding to the recess of the microlens structure, and the reflective pattern may be disposed on the cover layer. Thereby, it helps to improve light extraction efficiency, reduce reflectance and prevent light leakage.

The above features, structures, effects, and the like are included in at least one exemplary embodiment of the present invention and are not construed as being limited to only one exemplary embodiment. Features, structures, effects, and the like, which are described in the exemplary embodiments, may be combined or modified by those of ordinary skill in the art to which the present invention pertains. Therefore, the matters related to the combination and modification of the above-described exemplary embodiments should be construed as being included in the scope of the present invention.

In addition, although the invention is disclosed in the above exemplary embodiments, it is not intended to limit the invention. It is within the scope of the invention to be modified and modified without departing from the spirit and scope of the invention. For example, each of the elements described in the exemplary embodiments may be modified as appropriate without departing from the spirit and scope of the invention.

1000‧‧‧ display
1100‧‧‧ display panel
1200‧‧‧ data drive
1300‧‧ ‧ gate driver
1400‧‧‧ timing controller
DL1, DL2, DL3, DL4....., DLm‧‧‧ data line
GL1, GL2, GL3....., GLn‧‧ ‧ gate line
EL‧‧‧Organic light-emitting elements
Tr‧‧‧thin film transistor
100‧‧‧Substrate
101‧‧‧buffer layer
102‧‧‧Active layer
103‧‧‧ gate insulation
104‧‧‧gate electrode
105‧‧‧Interlayer insulation
106‧‧‧Source electrode
107‧‧‧汲electrode
108‧‧‧Protective layer
109‧‧‧Color layer
110‧‧‧Polarizer
111, 211‧‧‧ first electrode
112‧‧‧ dyke pattern
113, 213‧‧‧ organic light-emitting layer
114, 214‧‧‧ second electrode
120, 220‧‧‧ reflection pattern
130, 140, 230, 240, 330, 340‧ ‧ slopes
150, 250‧‧‧ first range
160, 260‧‧‧ second range
155, 255‧‧‧ third range
180, 280, 380‧‧‧ microlens structure
190, 290‧‧ ‧ overlay
191‧‧‧ openings
500‧‧‧External ambient light
A1‧‧‧ first direction
A2‧‧‧ second direction
A‧‧‧ total reflection critical angle
D1, d3‧‧‧ width of the reflection pattern
D1, D2‧‧‧ distance between the two centers of the two recesses of the microlens structure
D3‧‧‧ Width of the protrusion of the microlens structure
D11‧‧‧Distance between the two centers of the two convex portions of the microlens structure
E‧‧‧Separate space
F1, F2‧‧‧ half-height full width of microlens structure
N‧‧‧ reference line
S‧‧‧ horizontal reference plane

FIG. 1 is a schematic structural view of a display according to an embodiment of the invention. 2 is a schematic cross-sectional view showing an organic light emitting diode display device according to an embodiment of the invention. 3 is a top plan view of an organic light emitting diode display device according to another embodiment of the present invention. 4 is a cross-sectional view of the organic light emitting diode display device of FIG. 3 taken along line A-B. FIG. 5 is a schematic cross-sectional view showing an organic light emitting diode display device according to still another embodiment of the present invention. FIG. 6 is a schematic cross-sectional view showing an organic light emitting diode display device according to still another embodiment of the present invention. FIG. 7 is a schematic cross-sectional view showing an organic light emitting diode display device according to still another embodiment of the present invention. FIG. 8 is a schematic cross-sectional view showing an organic light emitting diode display device according to still another embodiment of the present invention. FIG. 9 is a schematic diagram of reducing the reflectance of an organic light emitting diode display device according to an embodiment of the invention. FIG. 10 is a schematic diagram of an organic light emitting diode display device for preventing light leakage according to an embodiment of the invention. FIG. 11 is a schematic diagram showing an improvement of light extraction efficiency of an organic light emitting diode display device according to an embodiment of the invention.

EL‧‧‧Organic light-emitting elements

100‧‧‧Substrate

111‧‧‧First electrode

113‧‧‧Organic light-emitting layer

114‧‧‧second electrode

120‧‧‧Reflective pattern

130, 140‧‧‧ slopes

150‧‧‧First range

160‧‧‧second range

155‧‧‧ third range

180‧‧‧Microlens structure

190‧‧‧ Coverage

A1‧‧‧ first direction

A2‧‧‧ second direction

D1‧‧‧Width of the reflection pattern

D1‧‧‧Distance between the two centers of the two recesses of the microlens structure

D11‧‧‧Distance between the two centers of the two convex portions of the microlens structure

F1‧‧‧ half-height full width of microlens structure

S‧‧‧ horizontal reference plane

Claims (22)

An organic light emitting diode display device includes: a substrate; a cover layer disposed on the substrate, wherein the cover layer comprises a plurality of microlens structures; an organic light emitting device comprising a first electrode, an organic light emitting layer, and a second electrode, the organic light emitting device is disposed on the cover layer, the organic light emitting device has a curved surface formed according to shapes of the microlens structures, and the microlens structures respectively include a recess and a protrusion; and a reflective pattern And disposed in the region of the organic light emitting diode display device corresponding to the recesses. The organic light emitting diode display device of claim 1, wherein the protrusions of the microlens structures separate the recesses. The organic light emitting diode display device of claim 2, wherein the protrusions of the microlens structures are alternately disposed with the recesses. The OLED display device of claim 1, wherein the protrusions of the microlens structure respectively have a slope, the slope is at an angle with respect to a horizontal reference surface, and the angle is 40 degrees. 60 degrees or 120 degrees to 140 degrees. The OLED display device of claim 1, wherein the cover layer has at least one opening, and the protrusion of at least one of the microlens structures comprises two convex portions, the at least one opening separating the The two convex portions are disposed in a separation space corresponding to the at least one opening, and the separation spaces are correspondingly recessed. The organic light emitting diode display device of claim 1, further comprising a polarizing plate disposed between the organic light emitting layer of the organic light emitting device and the polarizing plate. The organic light emitting diode display device of claim 1, wherein the refractive index of the first electrode and the refractive index of the organic light emitting layer are both greater than a refractive index of the cover layer and a refractive index of the substrate. The organic light emitting diode display device of claim 1, wherein the organic light emitting layer is adapted to emit an outgoing light that is incident on a polarizing plate and is reflected by the polarizing plate to generate a reflected light. And the reflective pattern is disposed on the optical path of the reflected light. The OLED display device of claim 1, wherein the protrusions of the microlens structure respectively comprise two convex portions, and the width of the reflective pattern is smaller than the two centers of the two convex portions. The distance between them. The organic light emitting diode display device of claim 1, wherein the width of the reflective pattern is smaller than a distance between two centers of the two adjacent recesses. The organic light emitting diode display device of claim 1, wherein the reflective pattern is disposed between the cover layer and the substrate. The organic light emitting diode display device of claim 1, wherein the organic light emitting diode display device is disposed in a region corresponding to the recesses, the reflective pattern is disposed on a color filter layer, the color filter The layer is disposed on the substrate or an insulating layer, and a thin film electro-crystal system is disposed on the substrate or the insulating layer. The organic light emitting diode display device of claim 1, wherein the organic light emitting diode display device is disposed in the region corresponding to the recesses, the reflective pattern is disposed on the cover layer and the first electrode between. The organic light emitting diode display device of claim 1, further comprising: a bank layer pattern disposed between the cover layer and the first electrode, and the bank layer pattern defines the organic light emitting diode a light emitting portion of the polar body display device and a non-light emitting portion; wherein the microlens structures are located in a region of the organic light emitting diode display device corresponding to the light emitting portion. The OLED display device of claim 1, wherein the microlens structures respectively have a first range corresponding to the recess, a second range corresponding to a sidewall surrounding the recess, and Corresponding to a third range of a convex portion of the protrusion, and the reflection pattern is disposed in a region corresponding to the first range of the organic light emitting diode display device. An OLED display device includes: a substrate having an illuminating light side and a illuminating light side; a covering layer disposed on the illuminating light side of the substrate, wherein the covering layer is opposite to the substrate One of the organic light-emitting elements includes a first electrode, an organic light-emitting layer, and a second electrode, and the organic light-emitting element is disposed on the cover layer, and the organic light-emitting element has a non-flat surface a curved surface formed by the shape of the flat surface, and the light emitted by the organic light emitting layer is adapted to be emitted from the light emitting light side through the light emitting light side; and a reflective pattern is disposed on the first electrode and the This illumination of the substrate enters between the light sides. The OLED display device of claim 16, wherein the cover layer comprises a plurality of microlens structures, the microlens structures are located on the non-planar surface, and the microlens structures respectively comprise a recess and a protrusion. The cover layer has at least one opening, and the protrusion of at least one of the microlens structures includes two convex portions, the at least one opening partitioning the two convex portions, and the reflective pattern is disposed on a separation space corresponding to the at least one opening Inside, and the partition space corresponds to the recess. The organic light emitting diode display device of claim 16, further comprising a polarizing plate disposed between the organic light emitting layer of the organic light emitting device and the polarizing plate. The organic light emitting diode display device of claim 17, wherein the width of the reflective pattern is smaller than a distance between two centers of the two convex portions. The organic light emitting diode display device of claim 17, wherein the width of the reflective pattern is smaller than a distance between two centers of the two adjacent recesses. The OLED display device of claim 16, wherein the cover layer comprises a plurality of microlens structures, the microlens structures are located on the non-planar surface, and the microlens structures respectively comprise a recess and a protrusion. And the reflective pattern is disposed in a region corresponding to the recesses of the organic light emitting diode display device. The organic light emitting diode display device of claim 21, wherein the organic light emitting diode display device is disposed in a region corresponding to the recesses, the reflective pattern is disposed on a color filter layer, the color filter The layer is disposed on the substrate or an insulating layer, and a thin film electro-crystal system is disposed on the substrate or the insulating layer.