Display device using semiconductor light-emitting element
The present disclosure relates to a display device and, in particular, a display device using a semiconductor light-emitting device. The display device according to the present disclosure comprises: a substrate having a wiring electrode; a plurality of semiconductor light-emitting elements are electrically connected to the wiring electrode; a plurality of fluorescent substance layers for converting a wavelength of light; a wavelength conversion layer having a plurality of light-emitting elements formed from a plurality of fluorescent substance layers, and a color filter disposed so as to cover the wavelength conversion layer, where at least one of the plurality of fluorescent substance layers has a plurality of layers.
1. A display device, comprising:
a substrate on which wiring electrodes are formed;
a plurality of semiconductor light-emitting elements electrically connected to the wiring electrodes;
a wavelength conversion layer provided with a plurality of phosphor layers that convert a wavelength of light and a plurality of partition wall portions formed between the plurality of phosphor layers to cover the plurality of semiconductor light-emitting elements; and
a color filter disposed to cover the wavelength conversion layer,
wherein the plurality of phosphor layers comprise:
a first phosphor layer disposed at a position corresponding to a red pixel and comprising a plurality of layers; and
a second phosphor layer disposed at a position corresponding to a green pixel and comprising a single layer, and
wherein the plurality of partition wall portions comprise:
a first partition wall portion disposed to cover a space between the plurality of semiconductor light-emitting elements; and
a second partition wall portion configured to cover a position corresponding to a blue pixel.
2. The display device of claim 1 , wherein the plurality of layers are formed such that a red phosphor overlaps with a yellow or green phosphor.
3. The display device of claim 2 , wherein a phosphor provided in the second phosphor layer is the yellow phosphor.
4. The display device according to claim 2 , wherein the yellow phosphor comprises at least one of YAG or LuAG.
5. The display device according to claim 2 , wherein the red phosphor is mixed with a photosensitive material to form any one of the plurality of layers.
6. The display device of claim 5 , wherein the red phosphor forms a first layer comprising inorganic phosphor, and a height of the first layer is within a range of 50% to 90% of a height of the partition wall portions.
7. The display device of claim 6 , wherein a second layer comprising the yellow phosphor is formed on the first layer.
8. The display device of claim 5 , wherein the red phosphor forms a first layer comprising organic phosphor, and a second layer comprising the yellow phosphor is formed below the first layer.
9. The display device of claim 8 , wherein the second layer is formed of a same material and with a same height as a phosphor layer disposed on the green pixel.
10. The display device of claim 9 , wherein a thickness of the first layer is within a range of 0.1 to 3 micrometers.
11. A method of fabricating a display device, the method comprising:
coupling a plurality of semiconductor light-emitting elements to wiring electrodes formed on a substrate;
forming a wavelength conversion layer disposed to cover the plurality of semiconductor light-emitting elements, the wavelength conversion layer provided with a plurality of phosphor layers that convert a wavelength of light and a plurality of partition wall portions formed between the plurality of phosphor layers; and
placing a color filter to cover the wavelength conversion layer using an adhesive layer,
wherein the wavelength conversion layer comprises:
a first phosphor layer disposed at a position corresponding to a red pixel and comprising a plurality of layers; and
a second phosphor layer disposed at a position corresponding to a green pixel and comprising a single layer, and
wherein the plurality of partition wall portions comprise:
a first partition wall portion disposed to cover a space between the plurality of semiconductor light-emitting elements; and
a second partition wall portion configured to cover a position corresponding to a blue pixel.
12. The method of claim 11 , wherein a first layer of the plurality of layers comprises a red phosphor formed by a photolithography method, and a second layer thereof comprises a yellow or green phosphor formed by a coating method.
13. The method of claim 12 , wherein the first layer is formed by mixing the red phosphor with a photosensitive material.