Curved display panel and method of producing the same

Patent metadata

Field	Value
Publication number	US-11016326-B2
Application number	US-201916663913-A
Country	US
Kind code	B2
Filing date	Oct 25, 2019
Priority date	Nov 5, 2018
Publication date	May 25, 2021
Grant date	May 25, 2021

Abstract

A curved display panel including a display surface curved around one curving axis includes a first substrate, a second substrate disposed opposite the first substrate while having a space therebetween, first pixel sections included in the first substrate and arranged within a surface area of the display surface, and second pixel sections included in the second substrate and arranged within the surface area of the display surface and overlapping the first pixel sections, respectively, in a curved state of the display surface. For at least some of the second pixel sections that are to be displaced by curving, position relation with respect to the first pixel sections in the flat state of the display surface is changed from that in the curved state of the display surface by a correction displacement amount based on an assumed displacement amount corresponding to a position within the surface area of the display surface.

First claim

The invention claimed is:

1. A curved display pane including a display surface displaying an image, the display surface being curved around at least one curving axis, the curved display panel comprising:
a first substrate;
a second substrate disposed opposite the first substrate while having a space therebetween;
first pixel sections included in the first substrate and arranged within a surface area of the display surface; and
second pixel sections included in the second substrate and arranged within the surface area of the display surface and overlapping the first pixel sections, respectively, in a curved state of the display surface, wherein
at least some of the second pixel sections are to be displaced with respect to the first pixel sections according to change of the display surface from a flat state to the curved state, and for the at least some of the second pixel sections that are to be displaced by curving, position relation with respect to the first pixel sections corresponding to the at least some of the second pixel sections in the flat state of the display surface is changed from that in the curved state of the display surface by correction displacement amounts based on assumed displacement amounts corresponding to positions of the first pixel sections and the at least some of the second pixel sections corresponding to each other within the surface area of the display surface,
the correction displacement amounts include a first correction displacement amount a second correction displacement amount, a third correction displacement amount, and a fourth correction displacement amount and the assumed displacement amounts include a first assumed displacement amount a second assumed displacement amount a third assumed displacement amount and a fourth assumed displacement amount,
the first correction displacement amount in a curving direction that is perpendicular to the curving axis based on the first assumed displacement amount between first one of the first pixel sections and first one of the at least some of the second pixel sections that are corresponding to each other in a first position within the surface area of the display surface differs from the second correction displacement amount in the curving direction based on the second assumed displacement amount between second one of the first pixel sections and second one of the at least some of the second pixel sections that are corresponding to each other in a second position within the surface area, and the first position and the second position are disposed adjacent to each other in the curving direction, and
the third correction displacement amount in a curving perpendicular direction parallel to the curing axis based on the third assumed displacement amount between third one of the first pixel sections and third one of the at least some of the second pixel sections that are corresponding to each other in a third position within the surface area of the display surface differs from the fourth correction displacement amount in the curving perpendicular direction based on the fourth assumed displacement amount between fourth one of the first pixel sections and fourth one of the at least some of the second pixel sections that are corresponding to each other in a fourth position within the surface area, and the third position and the fourth position are disposed adjacent to each other in the curving perpendicular direction.

2. The curved display panel according to claim 1 , wherein the correction displacement amounts are based on an approximate curve that is obtained by plotting the assumed displacement amounts at the every positions within the surface area of the display surface.

3. The curved display panel according to claim 2 , wherein
the approximate curve includes a first approximate curve and a second approximate curve, the first approximate curve is obtained by plotting the assumed displacement amounts in a middle section of the display surface with respect to the curving perpendicular direction and the middle section extending in the curving direction, and the second approximate curve is obtained by plotting the assumed displacement amounts in a section that includes a position having a largest assumed displacement amount on the first approximate curve and extends in the curving perpendicular direction, and
the correction displacement amounts of the at least some of the second pixel sections that are to be displaced with respect to the first pixel sections are based on a multiplied function that is obtained by multiplying a first function related to the first approximate curve and a second function related to the second approximate curve.

4. The curved display panel according to claim 1 , further comprising a sealing member disposed between outer peripheral edge portions of the first substrate and the second substrate to fix the outer peripheral edge portions to each other.

5. The curved display panel according to claim 1 , further comprising a light blocking sections included in the second substrate and defining each of the second pixel sections that are adjacent to each other, wherein
for the at least the some of the second pixel sections that are to be displaced by curving, the position relation with respect to the first pixel sections in the flat state of the display surface is changed from that in the curved state of the display surface by adjusting a widths of the light blocking sections in the curving direction by the correction displacement amounts based on the assumed displacement amounts corresponding to the positions within the surface area of the display surface.

6. The curved display panel according to claim 5 , wherein the widths of the light blocking sections are adjusted and varied regularly in the curving direction by every certain unit dimension.

7. The curved display panel according to claim 6 , wherein the widths of the light blocking sections in the curving direction are adjusted such that the light blocking sections having different widths are disposed at a shorter interval as a rate of change in one correction displacement amount based on one assumed displacement amount within a predefined length of the display surface in the curving direction is higher, and the light blocking sections having different widths are disposed at a longer interval as a rate of change in another correction displacement amount based on another assumed displacement amount within the predefined length of the display surface in the curving direction is smaller.

8. The curved display panel according to claim 1 , wherein the second pixel sections include color filters that are adjacent to each other in the curving perpendicular direction perpendicular to the curving direction of the display surface exhibit different colors and color filters that are adjacent to each other in the curving direction exhibit a same color.

9. A method of producing a curved display panel, the method comprising:
a flat display panel producing process of producing a flat display panel having a display surface that is in a flat state, the flat display panel producing process including
disposing a first substrate above a second substrate to be opposite the first substrate and have a space between the first substrate and the second substrate,
disposing first pixel sections on the first substrate to be arranged within a surface area of the display surface displaying an image,
disposing second pixel sections on the second substrate to be arranged within the surface area of the display surface; and
a flat display panel deformation process of deforming the flat display panel and curving the display surface around at least one curving axis to overlap the first pixel sections and the second pixel sections,

Assignees

• Sharp Kk

Inventors

• Hasegawa Hiroshi

Classifications

• G02F1/133514

  Colour filters · CPC title

• G02F2201/52

  RGB geometrical arrangements · CPC title

• G02F1/133512 Primary

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title

• G02F1/134336

  Matrix · CPC title

• G02F2201/56

  Substrates having a particular shape, e.g. non-rectangular · CPC title