KR-102963688-B1 - Viewing Angle Switchable Display Device Including Integrated Lens

KR102963688B1KR 102963688 B1KR102963688 B1KR 102963688B1KR-102963688-B1

Abstract

The present invention provides a viewing angle switching display device comprising: a substrate having at least one subpixel; a plurality of transistors disposed on the at least one subpixel on the upper part of the substrate; first and second light-emitting diodes disposed on the at least one subpixel on the upper part of the substrate and each connected to two of the plurality of transistors; and an integrated lens disposed on the first and second light-emitting diodes and comprising a semicylindrical lens corresponding to the first light-emitting diode and a hemispherical lens corresponding to the second light-emitting diode.

Inventors

송태준

Assignees

엘지디스플레이 주식회사

Dates

Publication Date: 20260511
Application Date: 20211230

Claims (9)

A substrate having at least one subpixel; A plurality of transistors disposed in at least one subpixel on the upper surface of the substrate; First and second light-emitting diodes disposed at the at least one subpixel on the upper surface of the substrate and connected to the plurality of transistors; An integrated lens disposed above the first and second light-emitting diodes, comprising a semicylindrical lens corresponding to the first light-emitting diode and a hemispherical lens corresponding to the second light-emitting diode. A viewing angle switching display device including
In Article 1, The above integrated lens is a viewing angle switching display device further comprising a light-blocking pattern disposed at the interface between the semi-cylindrical lens and the hemispherical lens.
In Article 1, The cross-section of the above semi-cylindrical lens along the vertical direction is semi-circular in shape, and A viewing angle switching display device in which the cross-section according to the left-right direction of the above semi-cylindrical lens is a rectangular shape with rounded corners or a semi-elliptical shape with inclined sides.
In Article 1, The first and second anodes of the first and second light-emitting diodes each have a planar shape corresponding to the semicylindrical lens and the hemispherical lens of the integrated lens, respectively, in a viewing angle switching display device.
In Article 4, The first anode and the semi-cylindrical lens have a rectangular planar shape with one side indented, The above second anode and the above hemispherical lens are a viewing angle switching display device having a circular planar shape.
In Article 1, An incap layer disposed on top of the first and second light-emitting diodes; First and second touch electrodes disposed on the upper portion of the above-mentioned cap layer; A first flattening layer disposed between the first and second touch electrodes and the integrated lens; A second flattening layer disposed on top of the integrated lens. A viewing angle switching display device including further
In Article 6, A viewing angle switching display device in which the refractive index of the integrated lens is greater than the refractive index of the second flattening layer.
In Article 1, The above plurality of transistors are, A first transistor connected to a high potential voltage; A second transistor that is switched according to a second light-emitting signal and connected to the first transistor and the first light-emitting diode; A third transistor that is switched according to a third light-emitting signal and connected to the first transistor and the second light-emitting diode; A fourth transistor that is switched according to the gate 2 signal and connected to the first transistor and the storage capacitor; A fifth transistor that is switched according to the gate 2 signal and connected to the second transistor and the reference signal; A sixth transistor that is switched according to the gate 2 signal and connected to the third transistor and the reference signal; A seventh transistor that is switched according to a first light-emitting signal and connected to the storage capacitor and the reference signal; The eighth transistor, which is switched according to the gate 1 signal and connected to the storage capacitor and data signal. A viewing angle switching display device including
In Article 8, The first light-emitting diode is connected between the second transistor and the low potential voltage, and The above second light-emitting diode is a viewing angle switching display device connected between the above third transistor and the above low voltage.

Description

Viewing Angle Switchable Display Device Including Integrated Lens The present invention relates to a display device, and more particularly to a viewing angle switching display device comprising an integrated lens comprising a semicylindrical lens with rounded corners and a hemispherical lens. As society has recently entered the full-scale information age, interest in information displays capable of processing and displaying large amounts of information is increasing. Furthermore, with the rising demand for portable information media, various lightweight and thin flat panel displays designed to meet these needs are being developed and are gaining attention. Among these flat panel display devices, organic light-emitting diode display devices are self-luminous devices that do not require a separate light source such as a backlight, and are widely applied in various fields because they have advantages in terms of viewing angle, contrast ratio, and power consumption. In particular, organic light-emitting diode (OLED) displays are used in vehicle dashboards, and in the automotive sector, OLED displays with switching viewing angles are being researched and developed to allow occupants in the driver's and passenger's seats to selectively view images. Organic light-emitting diode (OLED) displays for viewing angle switching utilize separate viewing angle switching films and light control films to switch the viewing angle of the displayed image. However, the addition of these separate films leads to reduced brightness and increased manufacturing costs, and there are problems such as the difficulty in developing viewing angle switching films for stable use in the automotive sector. FIG. 1 is a drawing illustrating a viewing angle switching display device according to an embodiment of the present invention. FIG. 2 is a circuit diagram illustrating a subpixel of a viewing angle switching display device according to an embodiment of the present invention. FIG. 3 is a cross-sectional view illustrating a viewing angle switching display device according to an embodiment of the present invention. FIG. 4 is a diagram illustrating the operation of wide field mode and narrow field mode of a pixel of a display panel of a viewing angle switching display device according to an embodiment of the present invention. FIG. 5 is a plan view illustrating an integrated lens of a viewing angle switching display device according to an embodiment of the present invention. FIG. 6 is a cross-sectional view along the cutting line IV-IV of FIG. 5. FIG. 7 is a table showing the brightness of a viewing angle switching display device according to an embodiment of the present invention. Hereinafter, a viewing angle switching display device including an integrated lens according to the present invention will be described with reference to the attached drawings. FIG. 1 is a drawing illustrating a viewing angle switching display device according to an embodiment of the present invention, and the display device may be an organic light emitting diode display device (OLED display device). As illustrated in FIG. 1, the viewing angle switching display device (110) according to the first embodiment of the present invention includes a timing control unit (120), a data driving unit (130), a gate driving unit (140), and a display panel (150). The timing control unit (120) can generate video data, data control signals, and gate control signals using a plurality of timing signals, such as a video signal, data enable signal, horizontal synchronization signal, vertical synchronization signal, and clock, transmitted from an external system (not shown), such as a graphics card or a TV system. Then, the timing control unit (120) transmits the generated video data and data control signals to the data driving unit (130), and transmits the generated gate control signals to the gate driving unit (140). The data driving unit (130) generates a data signal (data voltage) using a data control signal and image data transmitted from the timing control unit (120), and applies the generated data signal to the data wiring (DL) of the display panel (150). The gate driving unit (140) generates a gate signal (gate voltage) and a light emission signal using a gate control signal transmitted from the timing control unit (120), and applies the generated gate signal and light emission signal to the gate wiring (GL) of the display panel (150). Here, the gate driving unit (140) may be a gate-in-panel (GIP) type formed together with a gate wiring (GL), a data wiring (DL), and a pixel (P) on a substrate of a display panel (150) and placed in a non-display area (NDA). The display panel (150) includes a central display area (DA) and a non-display area (NDA) surrounding the display area (DA), and displays an image using a gate signal, a light emission signal, and a data signal. To display an image, the display panel (150) includes a plurality of pixels (P), a plurality of gate lines (GL), and a