Method for improving luminance uniformity of side-edge curved module

Patent metadata

Field	Value
Publication number	US-9684118-B2
Application number	US-201414378385-A
Country	US
Kind code	B2
Filing date	May 28, 2014
Priority date	May 4, 2014
Publication date	Jun 20, 2017
Grant date	Jun 20, 2017

Abstract

The present invention relates to a method for improving luminance uniformity of a side-edge curved module. The method includes: (1) dividing a display zone of a curved panel display zone into a plurality of panel grid cells and sequentially marking the plurality of grid cells as panel grid cells 1 -n, where n is a natural number; (2) dividing a light guide plate located exactly under the curved panel display zone into a plurality of corresponding light guide plate grid cells, each of the light guide plate grid cells having a dot density being indicated by Pn; (3) measuring transmittance of each of the panel grid cells, the transmittance of each of the panel grid cells being indicated by tn; and (4) taking the transmittance tc of the panel grid cell c that is located close to a center of the curved panel display zone as a reference, where c is a natural number less than n and the dot density of the light guide plate grid cell c corresponding to the panel grid cell c is indicated by Pc, wherein the dot density Pn of a light guide plate grid cell n is set between Pc×0.25×tc/tn to Pc×4×tc/tn. The present invention helps eliminate dark zones of a curved module and improves the luminance uniformity without increasing the product design expenditure.

First claim

What is claimed is:

1. A method for improving luminance uniformity of a side-edge curved module by providing a backlight module comprising a light guide plate and a light source in such a way that a surface of the light guide plate comprises dots that are arranged through a process comprising the following steps:
(1) dividing a display zone of a curved panel display zone of the side-edge curved module into a plurality of panel grid cells through horizontal lines and vertical lines that are imaginarily provided on the display zone and intersect each other to divide the display zone into a plurality of segments that respectively correspond to and form the plurality of panel grid cells on the display zone, and sequentially marking the plurality of grid cells as panel grid cells 1 -N, where N is a natural number;
(2) dividing the light guide plate that is located exactly under the curved panel display zone into a plurality of light guide plate grid cells through horizontal lines and vertical lines that are imaginarily provided on the light guide plate and intersect each other to divide the light guide plate into a plurality of sections that respectively correspond to the and form the plurality of light guide plate grid cells, wherein the light guide plate grid cells are arranged to respectively correspond to the plurality of the panel grid cells, the dots that are provided on the surface of the light guide plate being such that each of the light guide plate grid cells comprises a number of the dots arranged therein to provide a dot density associated with the light guide plate grid cell, the dot density of the light guide plate grid cell being indicated by Pn, where n is between 1 and N;
(3) measuring transmittance of each of the plurality of panel grid cells, the transmittance of each of the plurality of panel grid cells being indicated by tn, where n is between 1 and N; and
(4) taking the transmittance tc of a predetermined one of the panel grid cells that is located close to a center of the curved panel display zone as a reference, the predetermined one of the panel grid cells being denoted panel grid cell c, where c is a natural number less than N and the dot density of one of the light guide plate grid cells, denoted light guide plate grid cell c and corresponding to the panel grid cell c is indicated by Pc, wherein the dot density Pn of a light guide plate grid cell n is set between Pcx0.25×tc/tn to Pc×4×tc/tn, where n is between 1 and N.

2. The method for improving luminance uniformity of a side-edge curved module as claimed in claim 1 , wherein in Step 4, the dot density Pn of the light guide plate grid cell n is set between Pc×0.6 ×tc/tn to Pc×1.5×tc/tn.

3. The method for improving luminance uniformity of a side-edge curved module as claimed in claim 1 , wherein in Step 3, transmittance of a sample dot of each of the panel grid cells is designated to stand for the transmittance of the panel grid cell where the sample dot is located.

4. The method for improving luminance uniformity of a side-edge curved module as claimed in claim 3 , wherein in Step 1, the display zone of the curved panel is divided according to a 9×9 array into 81 panel grid cells and in Step 4, the panel grid cell c that is located close to the center is the 41st one of the panel grid cells.

5. The method for improving luminance uniformity of a side-edge curved module as claimed in claim 4 , wherein with a linear length of the curved panel display zone being designated by W and a linear width of the curved panel display zone being designated by H, the panel grid cells at four corners of the 9×9 array of the panel grid cells each have a light of 3W/20 and a width of 3H/20, while the remaining ones of the panel grid cells selectively have a length of W/10 or a width of H/10.

6. The method for improving luminance uniformity of a side-edge curved module as claimed in claim 5 , wherein the sample points have a spacing distance of W/10 in the lengthwise direction and H/10 in the widthwise direction.

7. The method for improving luminance uniformity of a side-edge curved module as claimed in claim 1 , wherein in Step 1 , the display zone of the curved panel is divided according to a 10×10 array into 100 panel grid cells.

8. The method for improving luminance uniformity of a side-edge curved module as claimed in claim 1 , wherein in Step 1 , the display zone of the curved panel is divided according to a 11×11 array into 121 panel grid cells.

9. method for improving luminance uniformity of a side-edge curved module by providing a backlight module comprising a light guide plate and a light source in such a way that a surface of the light guide plate comprises dots that are arranged through a process comprising the following steps:
(1) dividing a display zone of a curved panel display zone of the side-edge curved module into a plurality of panel grid cells through horizontal lines and vertical lines that are imaginarily provided on the display zone and intersect each other to divide the display zone into a plurality of segments that respectively correspond to and form the plurality of panel grid cells on the display zone, and sequentially marking the plurality of grid cells as panel grid cells 1 -N, where N is a natural number;
(2) dividing the light guide plate that is located exactly under the curved panel display zone into a plurality of light guide plate grid cells through horizontal lines and vertical lines that are imaginarily provided on the light guide plate and intersect each other to divide the light guide plate into a plurality of sections that respectively correspond to the and form the plurality of light guide plate grid cells, wherein the light guide plate grid cells are arranged to respectively correspond to the plurality of the panel grid cells, the dots that are provided on the surface of the light guide plate being such that each of the light guide plate grid cells comprises a number of the dots arranged therein to provide a dot density associated with the light guide plate grid cell, the dot density of the light guide plate grid cell being indicated by Pn, where n is between 1 and N;
(3) measuring transmittance of each of the plurality of panel grid cells, the transmittance of each of the plurality of panel grid cells being indicated by tn, where n is between 1 and N; and
(4) taking the transmittance tc of a predetermined one of the panel grid cells that is located close to a center of the curved panel display zone as a reference, the predetermined one of the panel grid cells being denoted panel grid cell c, where c is a natural number less than N and the dot density of one of the light guide plate grid cells, denoted light guide plate grid cell c and corresponding to the panel grid is indicated by Pc, wherein the dot density Pn of a light guide plate grid cell n is set between a lower bond that is equal to or greater than Pc×0.25×tc/tn and an upper bound that is equal to or smaller than Pc×4×tc/tn, where n is between 1 and N;
wherein in Step 4, the lower bound and the upper bound of the dot density Pn of the light guide plate grid cell n are respectively Pc×0.6×tc/tn and Pc×1.5×tc/tn.

10. The method for improving luminance uniformity of a side-edge curved module as claimed in claim 9 , wherein in Step 3, transmittance of a sample dot of each of the panel grid cells is designated to stand for the transmittance of the panel grid cell where the sample dot is located.

11. The method for improving luminance uniformity of a side-edge curved module as claimed in claim 10 , wherein in Step 1, the display zone of the curved panel is divided according to a 9×9 array into 81 panel grid cells and in Step 4, the panel grid cell c that is

Assignees

• Shenzhen China Star Optoelect
• Shenzhen China Star Optoelect

Inventors

• Wang Jiangfeng

Classifications

• G02B6/004

  Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles · CPC title

• G02B6/0061 Primary

  to provide homogeneous light output intensity · CPC title

• G02F1/133604

  with lamps · CPC title

• G02F1/1336

  Illuminating devices · CPC title

• G02F1/133611

  including means for improving the brightness uniformity · CPC title