US-12626665-B2 - Display device having a plurality of sub-pixels for outputting different viewing angle

Abstract

A display device can include a first mode sub-pixel having a first viewing angle and including a first emitting element, a second mode sub-pixel having a second viewing angle and including a second emitting element, a driving transistor connected to the first emitting element or the second emitting element, a first control transistor configured to connect the first emitting element to the driving transistor by being controlled by a mode selecting signal, a second control transistor configured to connect the second emitting element to the driving transistor by being controlled by the mode selecting signal, and a mode control line configured to apply the mode selection signal to the first switching transistor and the second switching transistor. The first control transistor and the second control transistor are applied with the mode selection signal from the same mode control line.

Inventors

• Yoonji CHOI
• Haksu Kim

Assignees

• LG DISPLAY CO., LTD.

Dates

Publication Date

20260512

Application Date

20241025

Priority Date

20231027

Claims (19)

1. 1 . A display device comprising: a first mode sub-pixel having a first viewing angle and including a first emitting element; a second mode sub-pixel having a second viewing angle and including a second emitting element; a driving transistor connected to the first emitting element or the second emitting element; a first control transistor configured to connect the first emitting element to the driving transistor by being controlled by a mode selecting signal; a second control transistor configured to connect the second emitting element to the driving transistor by being controlled by the mode selecting signal; and a mode control line configured to apply the mode selection signal to the first switching transistor and the second switching transistor, wherein the first control transistor and the second control transistor are applied with the mode selection signal from the same mode control line, and wherein the first control transistor is configured to be turned on by the mode selection signal corresponding to a first voltage, and the second control transistor is configured to be turned on by the mode selection signal corresponding to a second voltage different from the first voltage.
2. 2 . The display device of claim 1 , wherein the first viewing angle and the second viewing angle are different in at least one of a direction and an angular range.
3. 3 . The display device of claim 1 , wherein the second mode sub-pixel is disposed adjacent to the first mode sub-pixel.
4. 4 . The display device of claim 1 , wherein only one of the first control transistor and the second control transistor is turned on when the mode selection signal is applied to the first control transistor and the second control transistor.
5. 5 . The display device of claim 1 , wherein one of the first voltage and the second voltage is a high voltage and the other of the first voltage and the second voltage is a low voltage.
6. 6 . The display device of claim 1 , wherein one of the first control transistor and the second control transistor is a N-type transistor and the other of the first control transistor and the second control transistor is a P-type transistor.
7. 7 . The display device of claim 1 , further comprising: a timing controller configured to supply the mode selection signal to the mode control line.
8. 8 . The display device of claim 1 , further comprising: a pixel block provided with a plurality of sub-pixels comprising the first mode sub-pixel and the second mode sub-pixel, wherein the plurality of sub-pixels included in the pixel block are applied with the mode selection signal from the same mode control line.
9. 9 . The display device of claim 8 , wherein the pixel block is provided to be plural, and wherein the mode control line is provided to be plural and is disposed in each of the pixel blocks.
10. 10 . The display device of claim 9 , wherein the mode control lines correspond one-to-one with the pixel blocks.
11. 11 . A display device comprising: a display panel comprising a plurality of display areas, a pad area, and a plurality of mode control lines disposed in each of the plurality of display areas to extend to the pad area, the plurality of display areas having a plurality of sub-pixels respectively, wherein the plurality of mode control lines correspond one-to-one to the plurality of display areas, and wherein each of the plurality of mode control lines applies a mode selection signal to the plurality of sub-pixels provided in the corresponding display area.
12. 12 . The display device of claim 11 , wherein each of the plurality of sub-pixels comprises: a first mode sub-pixel having a first viewing angle and comprising a first emitting element, and a second mode sub-pixel having a second viewing angle smaller than the first viewing angle and comprising a second emitting element, wherein one of the first mode sub-pixel and the second mode sub-pixel selectively emits according to the mode selection signal.
13. 13 . The display device of claim 12 , wherein the first mode sub-pixel and the second mode sub-pixel, which are comprised in a same sub-pixel, are applied with the mode selection signal from the same mode control line.
14. 14 . The display device of claim 12 , wherein the display panel further comprises: a driving transistor connected to the first emitting element or the second emitting element, a first control transistor configured to connect the first emitting element to the driving transistor by being controlled by the mode selecting signal, and a second control transistor configured to connect the second emitting element to the driving transistor by being controlled by the mode selecting signal, wherein the first control transistor is turned on while the second control transistor is turned off, when the mode selection signal corresponding to a first gate-on-voltage is supplied to the mode control line, and wherein the first control transistor is turned off while the second control transistor is turned on, when the mode selection signal corresponding to a second gate-on-voltage is supplied to the mode control line.
15. 15 . The display device of claim 11 , further comprising: a circuit film on which a data drive integrated circuit (IC) is mounted, the circuit film comprising a plurality of signal lines connected to each of the plurality of mode control lines in the pad area of the display panel, and a printed circuit board connected to the circuit film, wherein a timing controller is mounted on the printed circuit board, wherein each of the plurality of mode control lines is supplied with the mode selection signal through the signal lines of the circuit film from the data drive IC or the timing controller.
16. 16 . The display device of claim 15 , wherein the circuit film is provided to be plural in a first direction, wherein each circuit film is provided with signal lines for controlling the modes of at least two display areas, and wherein the at least two display areas are disposed adjacent to each other in the first direction.
17. 17 . The display device of claim 16 , wherein the at least two display areas comprise a first display area and a second display area, and wherein the second display area comprises a first sub-area disposed in one side of the first display area and a second sub-area disposed in another side of the first display area.
18. 18 . The display device of claim 11 , wherein each of the plurality of mode control lines comprises: a plurality of first lines extended in a first direction within the corresponding display area, and one second line connecting the plurality of the first lines and extended to the pad area, wherein the same mode selection signal is applied to the plurality of first lines and the second line.
19. 19 . The display device of claim 18 , further comprising: a plurality of third lines extended in a second direction within the corresponding display area and be connected to the plurality of first lines, the second direction being different from the first direction, wherein the plurality of first lines, the second line, and the plurality of third lines are supplied with the same mode selection signal.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to Korean Patent Applications No. 10-2023-0145871 filed in the Republic of Korea on Oct. 27, 2023, the entire contents of which is hereby expressly incorporated by reference into the present application. BACKGROUND Field of the Invention The present disclosure relates to a display device capable of controlling a viewing angle. Discussion of the Related Art Recently, there has been a problem of information leakage to third parties through image information displayed on a display device. To solve this problem, security films are being developed to provide image information only to specific people located in front of the display device. By attaching a security film to the display device, a user can prevent a nearby third party from viewing the image information displayed on the display device. On the other hand, by removing the security film from the display device, the user can allow a nearby third party to see the image information displayed on the display device. As a result, the user has inconvenience of having to carry and manage the security films separately, so that it can be difficult to partially obscure or provide image information to the third party. SUMMARY OF THE DISCLOSURE The present disclosure is to provide a display device capable of controlling a viewing angle without a security film. The present disclosure is to provide a display device capable of partially controlling a viewing angle within a display area. The present disclosure provides a display device which addresses the limitations and disadvantages associated with the related art. The present disclosure is to provide a display device capable of implementing Environmental/Social/Governance (ESG) by reducing the generation of greenhouse gases that can be generated by a manufacturing process. The technical benefits of the present disclosure are not limited to the above-mentioned benefits, and other benefits, which are not mentioned above, can be clearly understood by those skilled in the art from the following descriptions. A display device according to an embodiment of the present disclosure comprises a first mode sub-pixel having a first viewing angle and including a first emitting element; a second mode sub-pixel having a second viewing angle and including a second emitting element; a driving transistor connected to the first emitting element or the second emitting element; a first control transistor connecting the first emitting element to the driving transistor by being controlled by a mode selecting signal; a second control transistor connecting the second emitting element to the driving transistor by being controlled by the mode selecting signal; and a mode control line applying the mode selection signal to the first switching transistor and the second switching transistor, wherein the first control transistor and the second control transistor are applied with the mode selection signal from the same mode control line. A display device according to another embodiment of the present disclosure comprises a display panel comprising a plurality of display areas, a pad area, and a plurality of mode control lines disposed in the each of the plurality of display areas to extend to the pad area, the plurality of display areas having a plurality of sub-pixels respectively, wherein the plurality of mode control lines correspond one-to-one to the plurality of display areas, and each of the plurality of mode control line applies a mode selection signal to the plurality of sub-pixels provided in the corresponding display area. BRIEF DESCRIPTION OF THE 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 application, illustrate embodiments of the disclosure and together with the description serve to explain the principle of the disclosure. In the drawings: FIG. 1 is a perspective view illustrating a display device according to one embodiment of the present disclosure. FIG. 2 is a block diagram schematically illustrating a configuration of a display device according to one embodiment of the present disclosure. FIG. 3 is a plan view illustrating one example of a pixel in a display device according to one embodiment of the present disclosure. FIG. 4 is a cross-sectional view illustrating one example of a first mode sub-pixel along line I-I′ illustrated in FIG. 3. FIG. 5 is a cross-sectional view illustrating one example of a second mode sub-pixel along line II-II′ illustrated in FIG. 3. FIG. 6 is an equivalent circuit diagram illustrating the circuit configuration of each sub-pixel in a display panel according to one embodiment of the present disclosure. FIG. 7 is an illustration of an example driving waveform for a sub-pixel of a display panel, according to one embodiment of the present disclosure. FIG. 8 is a diagram illustrating an example of a plurality of display ar