Plasma display panel device with fluorescent layer protector
A plasma display panel device includes an upper substrate and a bottom substrate. A dielectric layer, a plurality of displaying electrodes and scanning electrodes are arranged on an inner surface of the upper substrate. A plurality of addressing electrodes and blue fluorescent layers are arranged on an inner surface of the bottom substrate. An optical film stack is formed on a surface of each blue fluorescent layer. The optical film stack includes a plurality of first optical units, and a plurality of second optical units located on the plurality of first optical units. Each of the first optical units and the second optical units respectively includes a high refractive index film and a low refractive index film.
1 . A plasma display panel device, comprising:
an upper substrate formed with a dielectric layer, a plurality of displaying electrodes, and a plurality of scanning electrodes; and
a bottom substrate formed with a plurality of addressing electrodes, and a plurality of blue fluorescent layers above the addressing electrodes;
wherein, an optical film stack is formed on each of the blue fluorescent layers, the optical film stack has a plurality of first optical units, and a plurality of second optical units located on the plurality of first optical units; and
each of the first optical units and the second optical units has a high refractive index film and a low refractive index film, a first reference thickness of the high refractive index film is equal to λ/4n 1 , a second reference thickness of the low refractive index film is equal to λ/4n 2 , λ is a reference wavelength, n 1 is a refractive index of the high refractive index film, and n 2 is a refractive index of the low refractive index film.
2 . The plasma display panel device as recited in claim 1 , wherein a physical thickness of the high refractive index film of the first optical unit is equal to the first reference thickness multiplied by a first coefficient, a physical thickness of the low refractive index film of the first optical unit is equal to the second reference thickness multiplied by a second coefficient, a physical thickness of the high refractive index film of the second optical unit is equal to the first reference thickness multiplied by a third coefficient, a physical thickness of the low refractive index film of the second optical unit is equal to the second reference thickness multiplied by a fourth coefficient, and ranges of the first, the second, the third, and the fourth coefficients are respectively from 0.372 to 1.064, 0.960 to 1.203, 0.477 to 0.946, and 0.389 to 2.183.
3 . The plasma display panel device as recited in claim 2 , wherein the first, the second, the third, and the fourth coefficients are respectively 1, 1, 0.76, and 0.76.
4 . The plasma display panel device as recited in claim 3 , wherein the value of the reference wavelength is between 200 and 380 nanometers.
5 . The plasma display panel device as recited in claim 4 , wherein the value of the reference wavelength is 320 nanometers.
6 . The plasma display panel device as recited in claim 1 , wherein the high refractive index films of both the first optical units and the second optical units are made of titanium oxide.
7 . The plasma display panel device as recited in claim 6 , wherein the refractive index n 1 of the high refractive index films is 2.705.
8 . The plasma display panel device as recited in claim 6 , wherein the low refractive index films of both the first optical units and the second optical units are made of silicon oxide.
9 . The plasma display panel device as recited in claim 8 , wherein the refractive index n 2 of the low refractive index films is 1.499.
10 . The plasma display panel device as recited in claim 1 , wherein the number of first optical units is seven.
11 . The plasma display panel device as recited in claim 10 , wherein the number of second optical units is six.
12 . The plasma display panel device as recited in claim 1 , wherein the blue fluorescent layers comprise BaMgAlO x1 :Eu 2+ , CaMgSiO x2 :Eu 2+ , BaMgAl 10 O 17 :Eu 2+ , or aluminate doped with Eu 2+ , a numerical value of x 1 being one, two, or three, and a numerical value of x 2 being one or two.
13 . The plasma display panel device as recited in claim 1 , wherein the red fluorescent layers comprise Y 2 O 3 :Eu 2+ , YBO 3 :Eu 3+ , or GdBO 3 :Eu 3+ .
14 . The plasma display panel device as recited in claim 1 , wherein the green fluorescent layers comprise Zn 2 SiO 4 :Mn 2+ , ZnSiO x :Mn 2+ , or aluminate doped with Mn 2+ , a numerical value of x being one or two.
15 . The plasma display panel device as recited in claim 1 , further comprising a plurality of red fluorescent layers and green fluorescent layers above the addressing electrodes.
16 . The plasma display panel device as recited in claim 15 , wherein an optical unit is also formed on each of the red fluorescent layers and the green fluorescent layers, and the optical unit has a same structure as the optical unit formed on each of the blue fluorescent layers.