Display apparatus
View Patent ↗A display apparatus is disclosed, and comprises a display panel and a lens. On the display panel, there are a width-fixed pixel zone, a width-variating pixel zone and a border zone arranged sequentially from the center to the edges of the display panel, wherein there are a plurality of width-fixed pixels disposed in the width-fixed zone, and there are a plurality of width-variating pixel groups disposed in the width-variating pixel zone, and the widths of the width-variating pixel groups are present in a first decreasing sequence. The lens has a focus-length-variating portion and a planar portion, wherein the planar portion is aligned with the width-fixed pixel zone, and the focus-length-variating portion is disposed to correspond to the border zone and the width-variating pixel zone. The focus lengths of the focus-length-variating portion corresponding to the width-variating pixel groups are present in a second decreasing sequence.
1. A display apparatus, comprising:
a display panel having a width-fixed pixel zone, a width-variating pixel zone and a border zone arranged sequentially from its center to its edges, wherein there are a plurality of width-fixed pixels disposed in the width-fixed zone, and there are a plurality of width-variating pixel groups disposed in the width-variating pixel zone, the width-variating pixel groups having respective widths present in a first decreasing sequence {P 1 , P 2 , . . . , P N }, wherein P 0 >P 1 , P 0 representing the width of each of the width-fixed pixels; and
a lens having a focus-length-variating portion and a planar portion, wherein the planar portion is aligned with the width-fixed pixel zone, and the focus-length-variating portion is disposed to correspond to the border zone and the width-variating pixel zone, the focus-length-variating portion having a plurality of microstructure groups, and respective focus lengths of the focus-length-variating portion corresponding to the width-variating pixel groups are present in a second decreasing sequence {f 1 , f 2 , . . . , f N };
wherein the number of the width-variating pixel groups and the number of the microstructure groups are the same as an integer N, and each of the width-variating pixel groups is composed of at least one width-variating pixel, and the total number of the width-variating pixels of the width-variating pixel groups is a total count M, the total count M satisfying the following relationship:
M ≧( d ×tan θ)/ P 0 ;
wherein M is a positive integer, d representing the distance between the display panel and the lens, θ representing a slant view angle.
2. The display apparatus as claimed in claim 1 , wherein, in the width-variating pixel groups, one width-variating pixel group with a width P 1 is disposed closest to the width-fixed zone, and another width-variating pixel group with the width P N is disposed closest to the border zone.
3. The display apparatus as claimed in claim 1 , wherein θ is ranged between 44.7° and 45.3°.
4. The display apparatus as claimed in claim 1 , wherein the integer N satisfies the following relationship:
N ≧( P 0 −P N )/PD;
P N =P 0 ×m N ;
m N =PA/FA;
PD≦(VD×tan α)/ M;
wherein N is a positive integer; PD representing an allowable difference between two adjacent pixels, m N representing the smallest magnification ratio, and PA representing the width of the width-variating pixel zone, and FA represents the width of the focus-length-variating portion, and VD representing a view distance, a representing a visual angle of human eyes.
5. The display apparatus as claimed in claim 4 , wherein α is ranged between 0.019° and 0.021°.
6. The display apparatus as claimed in claim 4 , wherein the number of the at least one width-variating pixel in each of the width-variating pixel groups is equal to the total count M divided by the integer N.
7. The display apparatus as claimed in claim 4 , wherein the first decreasing sequence {P 1 , P 2 , . . . , P N } satisfies the following relationship:
P i =P 0 −i ×( P 0 −P N );
I= 1,2 , . . . ,N;
wherein P i represents the width of the i-th width-variating pixel group.
8. The display apparatus as claimed in claim 4 , wherein the second decreasing sequence {f 1 , f 2 , . . . , f N } satisfies the following relationship:
f j =d /(1 −m j );
m j =1 −j ×(1 −m N )/ N;
j= 1,2 , . . . ,N;
wherein f j represents the focus length of the j-th microstructure group, m j representing the magnification ratio corresponding to the j-th microstructure group.
9. The display apparatus as claimed in claim 1 , wherein the lens is a Fresnel lens.
10. The display apparatus as claimed in claim 1 , wherein an angle included between each of the microstructure groups and the planar portion is ranged between 0° and 41°.
11. A display apparatus, comprising:
a display panel having a width-fixed pixel zone, a width-variating pixel zone and a border zone arranged sequentially from its center to its edges, wherein there are a plurality of width-fixed pixels disposed in the width-fixed zone, and there are a plurality of width-variating pixel groups disposed in the width-variating pixel zone; and
a lens having a focus-length-variating portion and a planar portion, wherein the planar portion is aligned with the width-fixed pixel zone, and the focus-length-variating portion is disposed to correspond to the border zone and the width-variating pixel zone, the focus-length-variating portion having a plurality of microstructure groups;
wherein the display panel is spaced from the lens at a distance d; each of the width-fixed pixels has a width P 0 ; the number of the width-variating pixel groups and the number of the microstructure groups are the same as an integer N, and the i-th width-variating pixel group has a width P i , wherein i=1, 2, . . . , N; the focus-length-variating portion corresponding to the j-th width-variating pixel group has a focus length f j , j=1, 2, . . . , N; and the j-th width-variating pixel group has a magnification ratio m j , and m j is present in a decreasing sequence {m 1 , m 2 , . . . , m N }, and each of the width-variating pixel groups is composed of at least one width-variating pixel, and the total number of the width-variating pixels of the width-variating pixel groups is a total count M, the total count M satisfying the following relationship:
M ≧( d ×tan θ)/ P 0 ;
wherein M is a positive integer, d representing the distance between the display panel and the lens, θ representing a slant view angle.
12. The display apparatus as claimed in claim 11 , wherein the integer N satisfies the following relationship:
N ≧( P 0 −P N )/PD;
P N =P 0 ×m N ;
m N =PA/FA;
PD≦(VD×tan α)/ M;
wherein PD representing an allowable differential between two adjacent pixels, m N representing the smallest magnification ratio, PA representing the width of the width-variating pixel zone, FA representing the width of the focus-length-variating portion, VD representing a view distance, a representing a visual angle of human eyes, and the total count is a multiple of the integer N.
13. The display apparatus as claimed in claim 12 , wherein FA≧PA+BA, BA representing the width of the border zone.
14. The display apparatus as claimed in claim 12 , wherein α is ranged between 0.019° and 0.021°.
15. The display apparatus as claimed in claim 11 , wherein θ is ranged between 44.7° and 45.3°.
16. The display apparatus as claimed in claim 11 , wherein m j =1−j×(1−m N )/N.
17. The display apparatus as claimed in claim 11 , wherein f j =d/(1−m j ).
18. The display apparatus as claimed in claim 11 , wherein an angle included between each of the microstructure groups and the planar portion is ranged between 0° and 41°.