CROSS-REFERENCE TO RELATED APPLICATION

This application claims the priority benefit of China application serial no. 201920952187.3, filed on Jun. 24, 2019. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification.

BACKGROUND

Technical Field

The disclosure relates to a display technology, and more particularly to a screen anti-peeping protection layer and a touch display device with a touch function.

Description of Related Art

With the development of technology, touch display devices have become common electronic devices in daily life. At present, some display devices provide anti-peeping functions to protect the user's viewing privacy. However, if the touch display device is combined with the touch function and the anti-peeping function, the problems including that the touch recognition is reduced or the anti-peeping film falls off and the picture contrast is reduced may arise. Therefore, how to provide a touch display device with anti-peeping and touch functions and good display quality has become a subject to be studied.

The information disclosed in this Background section is only for enhancement of understanding of the background of the described technology and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Further, the information disclosed in the Background section does not mean that one or more problems to be resolved by one or more embodiments of the invention was acknowledged by a person of ordinary skill in the art.

SUMMARY

The disclosure provides a screen anti-peeping protection layer and a touch display device, which can protect the screen and adjust the emitted light viewing angle, and also have the advantages of avoiding touch misjudgment and maintaining good display picture quality.

Embodiments of the disclosure provide a screen anti-peeping protection layer arranged above the display panel. The screen anti-peeping protection layer includes a first polarizing layer, a second polarizing layer, a viewing angle adjusting layer and a touch sensing layer. The first polarizing layer and the second polarizing layer are sequentially arranged on a transmission path of a display beam, wherein the display beam comes from the display panel. The viewing angle adjusting layer is arranged on the transmission path and located between the first polarizing layer and the second polarizing layer, and used for changing a range of an emitted light viewing angle of the display beam. The touch sensing layer is arranged on the transmission path, and located above the viewing angle adjusting layer and opposite to the first polarizing layer.

Embodiments of the disclosure further provide a touch display device, including the display panel and the screen anti-peeping protection layer. The display panel is used for emitting a display beam. The screen anti-peeping protection layer is arranged on a transmission path of the display beam, and includes a first polarizing layer, a second polarizing layer, a viewing angle adjusting layer and a touch sensing layer. The first polarizing layer and the second polarizing layer are sequentially arranged on the transmission path. The viewing angle adjusting layer is arranged on the transmission path and located between the first polarizing layer and the second polarizing layer, and used for changing a range of an emitted light viewing angle of the display beam. The touch sensing layer is arranged on the transmission path, and located above the viewing angle adjusting layer and opposite to the second polarizing layer.

Based on the above, the screen anti-peeping protection layer of the disclosure has a touch function, and the touch display device includes the screen anti-peeping protection layer and the display panel as described above. The screen anti-peeping protection layer can provide a touch function, and protects the screen and adjusts the range of the emitted light viewing angle of the display panel. The touch sensing layer of the screen anti-peeping protection layer is arranged above the viewing angle adjusting layer, but the viewing angle adjusting layer is not adjacent to the touch sensing layer. The screen anti-peeping protection layer of the disclosure can avoid the touch misjudgment of the touch display device and maintain good display picture quality in different display modes.

Other objectives, features and advantages of the invention will be further understood from the further technological features disclosed by the embodiments of the invention wherein there are shown and described preferred embodiments of this invention, simply by way of illustration of modes best suited to carry out the invention.

