Color filter substrate and fabrication method thereof, OLED structure, related display panel, and related display device
The present disclosure provides a color filter substrate used in an organic light-emitting diode (OLED) or liquid crystal (LC) display structure for improving a contrast ratio and light output. The color filter substrate includes a substrate; a color filter layer comprising a plurality of pixel units; and a reflective metallic matrix comprising a plurality of reflective metallic matrix elements surrounding each pixel unit.
1. A color filter substrate, comprising:
a substrate;
a color filter layer comprising a plurality of pixel units; and
a reflective metallic matrix comprising a plurality of reflective metallic matrix elements surrounding each pixel unit,
wherein:
each of the metallic matrix elements has a bottom surface proximate to the substrate and larger than a top surface away from the substrate, and
a whole of each of the reflective metallic matrix elements is made of a same metallic material.
2. The color filter substrate of claim 1 , wherein each reflective metallic matrix element includes a reflective surface facing each adjacent pixel unit.
3. The color filter substrate of claim 2 , wherein the reflective surface forms an acute angle with a bottom surface of the metal matrix element contacting the substrate.
4. The color filter substrate of claim 3 , wherein the reflective surface forms an acute angle of about 30° to 60°.
5. The color filter substrate according to claim 1 , wherein the reflective metallic matrix elements comprise pyramid shaped metallic elements with reflective surfaces.
6. The color filter substrate according to claim 1 , wherein the reflective metallic elements comprise frustum shaped metallic elements with reflective surfaces.
7. The color filter substrate according to claim 1 , wherein the color filter layer is thinner than the reflective metallic matrix.
8. The color filter substrate according to claim 1 , further comprising a protection layer covering the reflective metallic matrix and the color filter layer.
9. The color filter substrate according to claim 8 , wherein a thickness of the protection layer is about 2 μm to 4 μm.
10. The color filter substrate according to claim 8 , further comprising light diffusers dispensed on the protection layer.
11. The color filter substrate according to claim 10 , wherein the light diffusers are transparent.
12. The color filter substrate according to claim 10 , wherein the light diffusers are light scattering particles with diameters of about 20 nm to 80 nm.
13. The color filter substrate according to claim 10 , wherein the light diffusers are selected from one or a combination of SiO 2 and TiO 2 .
14. The color filter substrate according to claim 1 , wherein the pixel units comprise blue pixel units, red pixel units, green pixel units, and white pixel units.
15. An organic light-emitting diode device (OLED) structure for improving a contrast ratio and light output, comprising:
an OLED array substrate including:
a thin-film transistor (TFT) substrate with a TFT layer;
an OLED layer formed on the TFT substrate, the OLED layer emitting light; and
a color filter substrate including:
a substrate;
a color filter layer comprising a plurality of pixel units; and
a reflective metallic matrix comprising a plurality of reflective metallic elements surrounding each pixel unit,
wherein:
each of the metallic matrix elements has a bottom surface proximate to the substrate and larger than a top surface away from the substrate, and
a whole of each of the reflective metallic matrix elements is made of a same metallic material.
16. The OLED structure according to claim 15 , wherein each reflective metallic matrix element includes a reflective surface facing each adjacent pixel unit.
17. The OLED structure according to claim 16 , wherein the reflective surface forms an acute angle with a bottom surface of the element contacting the substrate.
18. The OLED structure according to claim 17 , wherein the reflective surface forms an acute angle of about 30° to 60°.
19. A method for fabricating a color filter substrate, comprising:
forming a reflective metallic matrix including a plurality of reflective metallic matrix elements in an active region of a cover glass, wherein:
each of the reflective metallic matrix elements is of a pyramid shape having a bottom surface proximate to the cover glass and larger than a top surface away from the cover glass, and
a whole of each of the metallic matrix elements is made of a same metallic material;
forming pixel units in the active region of the cover glass, the plurality of reflective metallic matrix elements surrounding each of the pixel units;
forming a protection layer to cover the pixel units and the reflective metallic matrix; and
dispensing light diffusers on the protection layer.
20. A display panel, including the color filter substrate according to claim 1 .