CN-116261354-B - Organic light emitting diode display device

Abstract

An organic light emitting diode display device includes a substrate including first to third sub-pixels, first to third light emitting diodes respectively located in the first to third sub-pixels on the substrate, and a transmission control layer located on an outer surface of the substrate corresponding to an emission direction of light emitted from the first to third light emitting diodes, the transmission control layer including a first lens and a second lens covering the first lens, wherein one of the first to third sub-pixels includes a green sub-pixel, wherein the first lens is disposed to correspond to an emission region of the green sub-pixel, and wherein the second lens is disposed to correspond to the first to third sub-pixels.

Inventors

• Pu Jifan
• LI SHENGLAI
• YIN ZHIZHU
• Jin Zhenlian

Assignees

• 乐金显示有限公司

Dates

Publication Date

20260508

Application Date

20220929

Priority Date

20211207

Claims (14)

1. 1. An organic light emitting diode display device, comprising: a substrate including first to third sub-pixels; First to third light emitting diodes respectively located in the first to third sub-pixels on the substrate, and A transmission control layer on an outer surface of the substrate corresponding to an emission direction of light emitted from the first to third light emitting diodes, the transmission control layer including a first lens and a second lens covering the first lens, Wherein one of the first to third sub-pixels comprises a green sub-pixel, Wherein the first lens is arranged to correspond only to the emission area of the green sub-pixel, and Wherein the second lens is disposed to correspond to the first to third sub-pixels, and a refractive index of the first lens is greater than a refractive index of the second lens.
2. 2. The apparatus of claim 1, wherein the second lens has an absorption wavelength peak of 530nm to 540 nm.
3. 3. The apparatus of claim 1, wherein the second lens has a first thickness corresponding to the green sub-pixel and a second thickness corresponding to an outer periphery of the first lens, Wherein the second thickness is greater than the first thickness.
4. 4. The apparatus of claim 3, wherein the first thickness is a minimum thickness of the second lens.
5. 5. The device of claim 1, wherein the refractive index of the first lens is 0.1 or more greater than the refractive index of the substrate and the second lens.
6. 6. The apparatus of claim 5, wherein the first lens has a refractive index of 1.6 to 1.8.
7. 7. The apparatus of claim 6, wherein the second lens has a refractive index of 1.4 to 1.5.
8. 8. The apparatus of claim 7, wherein the transmission control layer further comprises a planarization layer covering the second lens, and Wherein the planarization layer has a refractive index of 1.4 to 1.5.
9. 9. The apparatus of claim 1, wherein the first through third sub-pixels comprise one of a red sub-pixel and a blue sub-pixel.
10. 10. The apparatus of claim 1, wherein the first to third light emitting diodes emit white light, and Wherein red, green and blue filter patterns are disposed between the transmission control layer and the first to third light emitting diodes to correspond to emission regions of the first to third sub-pixels.
11. 11. The device of claim 1, wherein the substrate further comprises a white subpixel, and Wherein a fourth light emitting diode is disposed in the white subpixel on the substrate.
12. 12. The apparatus of claim 11, wherein a white filter pattern is disposed between the transmission control layer and the fourth light emitting diode to correspond to an emission region of the white subpixel.
13. 13. The apparatus of claim 1, wherein the second lens is in contact with the outer surface of the substrate.
14. 14. The device of claim 11, wherein the white subpixel is exposed outside the second lens.

Description

Organic light emitting diode display device Cross Reference to Related Applications This patent application claims priority from korean patent application No.10-2021-0174043 filed in korea on 12 th month 7 of 2021, which is incorporated herein by reference in its entirety. Technical Field The present disclosure relates to an organic light emitting diode display device, and more particularly, to an organic light emitting diode display device in which a difference in color sense according to a viewing angle is improved. Background Recently, with the advent of information oriented society, there has been an increasing interest in information displays for processing and displaying a large amount of information and a demand for portable information media, and thus the display field has been rapidly advanced. Accordingly, various thin and lightweight flat panel display devices have been developed and paid attention to. Among various flat panel display devices, an Organic Light Emitting Diode (OLED) display device is an emissive device, and does not include a backlight unit used in a non-emissive device, such as a Liquid Crystal Display (LCD) device. As a result, the OLED display device has a low weight and a thin profile. In addition, the OLED display device has advantages in view angle, contrast ratio, and power consumption as compared with the LCD device. In addition, the OLED display device may be driven with a low Direct Current (DC) voltage and has a fast response speed. Furthermore, since the internal elements of the OLED display device have a solid phase, the OLED display device has high resistance to external impact and has a wide usable temperature range. When white is displayed in the OLED display device, a color sense of the white may vary according to a viewing angle of a user. When an OLED display device displaying white is viewed from the side, a greenish phenomenon in which white appears greenish may occur. The user may recognize the above-described difference in color sense, thereby causing light emission degradation, and the user may recognize such difference in color sense as degradation of the display. Disclosure of Invention Accordingly, the present disclosure is directed to an organic light emitting diode display device that substantially obviates one or more of the problems due to limitations and disadvantages of the related art. An object of the present disclosure is to provide an organic light emitting display device that improves a greenish phenomenon. Another object of the present disclosure is to provide an organic light emitting diode display device in which light emission degradation is prevented from being recognized by a user by minimizing a color sense difference of white display. Additional features and advantages of the disclosure will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the disclosure. These and other advantages of the present disclosure will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. To achieve these and other advantages and in accordance with the purpose of the present disclosure, as embodied and broadly described herein, an organic light emitting diode display device includes a substrate including first to third sub-pixels, first to third light emitting diodes respectively located on the substrate, and a transmission control layer located on an outer surface of the substrate corresponding to an emission direction of light emitted from the first to third light emitting diodes, the transmission control layer including a first lens and a second lens covering the first lens, wherein one of the first to third sub-pixels includes a green sub-pixel, wherein the first lens is disposed to correspond to an emission region of the green sub-pixel, and wherein the second lens is disposed to correspond to the first to third sub-pixels. It is to be understood that both the foregoing general description and the following detailed description are explanatory and are intended to provide further explanation of the disclosure as claimed. Drawings The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the principles of the disclosure. In the drawings: fig. 1 is a cross-sectional view illustrating a unit pixel including four sub-pixels of an organic light emitting diode display device according to an embodiment of the present disclosure; fig. 2 is a diagram illustrating a light emitting diode of an organic light emitting diode display device according to an embodiment of the present disclosure. Fig. 3A is a plan view illustrating a unit pixel including four sub-pixels of an organic light emitting diode