Pursuant to 35 U.S.C. § 119(a), this application claims the benefit of earlier filing date and right of priority to Korean Patent Application No. 10-2019-0052196, filed on May 3, 2019, the contents of which are all hereby incorporated by reference herein in its entirety.

BACKGROUND OF THE INVENTION

With the development of the information society, various demands for display devices are increasing. Various display devices such as liquid crystal displays (LCDs), plasma display panels (PDPs), electroluminescent displays (ELDs), and vacuum fluorescent displays (VFDs) have been recently studied and used in response to various demands for the display devices.

Among the display devices, a liquid crystal display panel of a liquid crystal display includes a liquid crystal layer and a thin film transistor (TFT) substrate and a color filter substrate that are positioned opposite each other with the liquid crystal layer interposed therebetween. The liquid crystal display panel can display an image using light provided by a backlight unit.

As interest in image quality of the display device recently increases, color representation or color reproducibility close to a true color is receiving significant attention, and many studies have been made on improvement in image quality for implementing the true color.

SUMMARY OF THE INVENTION

An object of the present disclosure is to address the above-described and other problems.

Another object of the present disclosure is to provide a display device capable of improving image quality.

Another object of the present disclosure is to provide a display device capable of improving color reproducibility.

Another object of the present disclosure is to provide a display device capable of efficiently controlling a wavelength of light provided by a backlight unit.

To achieve the above-described and other objects, in one aspect of the present disclosure, there is provided a display device comprising a display panel; a light assembly configured to provide light to the display panel; a light absorbing layer positioned on a path of light that is provided to the display panel by the light assembly, the light absorbing layer absorbing light of a predetermined range wavelength; and a light shielding layer between the light assembly and the display panel, the light shielding layer shielding or passing at least a portion of light provided by the light assembly.

According to another aspect of the present disclosure, the display panel may include a front substrate and a rear substrate opposite the front substrate, the light absorbing layer may be positioned or formed in front of the front substrate, and the light shielding layer may be positioned or formed in rear of the rear substrate.

According to another aspect of the present disclosure, the display device may further comprise a front polarizing layer on a front surface of the front substrate; and a rear polarizing layer on a rear surface of the rear substrate, and the light shielding layer may be combined or attached to the rear polarizing layer.

According to another aspect of the present disclosure, the light shielding layer may include a front film; a rear film opposite the front film; a liquid crystal layer filled between the front film and the rear film; and a thin film transistor (TFT) on the front film or the rear film, the TFT configured to control a voltage provided to the liquid crystal layer.

According to another aspect of the present disclosure, the display device may further comprise a common electrode on a rear surface of the front film; and a pixel electrode on a front surface of the rear film, and the TFT may be formed on the front surface of the rear film and electrically connected to the pixel electrode.

According to another aspect of the present disclosure, the display device may further comprise a sealant formed between the front film and the rear film at an edge of the display panel, and the sealant may fix the front film to the rear film and seals the liquid crystal layer.

According to another aspect of the present disclosure, the display device may further comprise a connection pad adjacent to one end of the rear film, positioned on the front surface of the rear film, and electrically connected to the TFT; and a wire electrically connected to the connection pad.

According to another aspect of the present disclosure, the light assembly may include a plurality of light assemblies forming a first matrix, and the light shielding layer may include a plurality of light shielding pixels that forms a second matrix and shields light provided by the plurality of light assemblies.

According to another aspect of the present disclosure, a number of elements of the second matrix may be equal to a number of elements of the first matrix.

According to another aspect of the present disclosure, a number of elements of the second matrix may be greater than a number of elements of the first matrix.

According to another aspect of the present disclosure, a number of elements of the second matrix may be less than a number of pixels of the display panel.

According to another aspect of the present disclosure, the light assembly may provide light in which an intensity of green-based light is 25% to 38% and an intensity of red-based light is 14% to 32% based on intensity 100% of blue-based light.

According to another aspect of the present disclosure, the light absorbing layer may absorb light of a wavelength band between 540 nm and 600 nm, and the light assembly may provide light in which an intensity of green-based light is 25% to 38% and an intensity of red-based light is 14% to 32% based on intensity 100% of blue-based light.

According to another aspect of the present disclosure, the light assembly may provide light in which an intensity of green-based light is about 31% and an intensity of red-based light is about 20% based on an intensity of blue-based light.

According to another aspect of the present disclosure, the light absorbing layer may include tetra-aza-porphyrin.

According to another aspect of the present disclosure, the light assembly may include a light source providing blue-based light; an encapsulant covering around the light source; and yellow-based and red-based fluorescent substances distributed within the encapsulant, and a mix ratio of the yellow-based fluorescent substance and the red-based fluorescent substance may be 0.42 to 0.62:0.37 to 0.57.

According to another aspect of the present disclosure, a sum of the mix ratio of the yellow-based fluorescent substance and the red-based fluorescent substance may be 1.

According to another aspect of the present disclosure, the light assembly may include a light source providing blue-based light; an encapsulant covering around the light source; and yellow-based and red-based fluorescent substances distributed within the encapsulant, and a content ratio of the yellow-based fluorescent substance and the red-based fluorescent substance may be 1:0.71 to 0.93.

According to another aspect of the present disclosure, the light assembly may include a light source providing blue-based light; an encapsulant covering around the light source; and yellow-based and red-based fluorescent substances distributed within the encapsulant, and a content ratio of the fluorescent substances may be 4.2 to 6.8% with respect to the encapsulant.

According to another aspect of the present disclosure, a color temperature of an image provided on a front surface of the display panel may be 10,000 to 12,000 K.

Effects of a display device according to the present disclosure are described as follows.

According to at least one aspect of the present disclosure, the present disclosure can improve image quality of the display device.

According to at least one aspect of the present disclosure, the present disclosure can improve color reproducibility.

According to at least one aspect of the present disclosure, the present disclosure can efficiently control a wavelength of light provided by a backlight unit.

Further scope of applicability of the present disclosure will become apparent from the detailed description given blow. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the disclosure, are given by illustration only, since various changes and modifications within the spirit and scope of the disclosure will become apparent to those skilled in the art from this detailed description.

