Light source module and method for manufacturing the same, and backlight module and display device using the same

Patent metadata

Field	Value
Publication number	US-11709307-B2
Application number	US-202117445829-A
Country	US
Kind code	B2
Filing date	Aug 24, 2021
Priority date	Jan 8, 2020
Publication date	Jul 25, 2023
Grant date	Jul 25, 2023

Abstract

A light source module and a method for manufacturing the same, and a backlight module and a display device using the same are provided. The method includes the following steps. A reference light source module is provided. The reference light source module comprises a substrate and plural light-emitting units arranged on the substrate. Then, plural optical trends between every two adjacent light-emitting units are obtained. Then, plural optical ratios between every two adjacent light-emitting units are calculated, in which each of the optical ratios is a ratio of each of the optical trends to a total reference optical trend of the reference light source module. Then, plural target distances are calculated according to the optical ratios and plural initial distances between every two adjacent light-emitting units are adjusted according to the target distances, thereby forming a target light source module.

First claim

What is claimed is:

1. A method for manufacturing a light source module, the method comprising:
providing a reference light source module, wherein the reference light source module comprises a substrate and a plurality of light-emitting units arranged on the substrate;
obtaining a plurality of optical trends between every two adjacent light-emitting units;
calculating a plurality of optical ratios between every two adjacent light-emitting units, wherein each of the optical ratios is a ratio of each of the optical trends to a total reference optical trend of the reference light source module; and
calculating a plurality of target distances according to the optical ratios and adjusting a plurality of initial distances between every two adjacent light-emitting units according to the target distances, so as to form a target light source module;
wherein each of the target distances is defined by the following equation:

P
i
′

=

(

∑

P
i

)

·

f
i

∑

f
i

⁢

;

wherein P′ i , represents each of the target distances, f i represents the optical trend at an area i between any two adjacent light-emitting units, P i represents the initial distance at the area i between any two adjacent light-emitting units.

2. The method of claim 1 , wherein each of the optical trends is defined by the following equation:

f
i

=

Br
i

Br
s

_

⁢

;

wherein f i represents the optical trend at the area i between any two adjacent light-emitting units, Br i represents a brightness value or a luminance value at the area i between any two adjacent light-emitting units, and Br s represents an average brightness value or an average luminance value generated by the reference light source module.

3. The method of claim 1 , wherein each of the optical trends is defined by one of the following equations:

f
i

=

Br
i

Br
_

⁢

⁢
and
⁢

⁢

f
i

=

Br
i

∑

n
=
1

i

⁢

Br
i
2

n

⁢

;

wherein f i represents the optical trend at the area i between any two adjacent light-emitting units, Br i represents a brightness value or a luminance value at the area i between any two adjacent light-emitting units which are arranged along a direction, and Br represents an average brightness value or an average luminance value generated by the light-emitting units which are arranged along the direction, and n represents the number of spacings between every two adjacent light-emitting units.

4. A backlight module, comprising:
the light source module manufactured by the method of claim 1 ; and
an optical film disposed on the light source module.

5. The backlight module of claim 4 , wherein the substrate of the light source module has a shape of a rectangle, a circle, an oval or a fan-shape, and the shape of the optical film corresponds to the shape of the substrate.

6. The backlight module of claim 4 , wherein the target distances between every two adjacent light-emitting units are not all equal.

7. The backlight module of claim 4 , wherein the target distances between every two adjacent light-emitting units located closer to side edges of the substrate are smaller than the target distances between every two adjacent light-emitting units located closer to a central area of the substrate.

8. A display device, comprising:
a backlight module of claim 4 ; and
a display panel disposed on the optical film.

9. A method for manufacturing a light source module, the method comprising:
providing a reference light source module, wherein the reference light source module comprises a substrate and a plurality of light-emitting units arranged on the substrate, wherein the light-emitting units are arranged along a first direction to form a plurality of rows, and the light-emitting units are arranged along a second direction to form a plurality of columns;
respectively obtaining a plurality of optical trends between every two adjacent light-emitting units in each row and in each column;
calculating a plurality of optical ratios between every two adjacent light-emitting units, wherein each of the optical ratios is a ratio of each of the optical trends to a total reference optical trend of the reference light source module; and
calculating a plurality of target distances corresponding to every two adjacent light-emitting units in each row and in each column according to the optical ratios, and adjusting a plurality of initial distances between every two adjacent light-emitting units in each row along the first direction according to the target distances, and adjusting a plurality of initial distances between every two adjacent light-emitting units in each column along the second direction acco

Assignees

• Radiant Opto Electronics Suzhou Co Ltd
• Radiant Opto Electronics Corp
• Radiany Opto Electronics Corp

Inventors

• Chen chang-yao
• Chang Chih-Chiang
• Tsai Ya-Yin

Classifications

• G02B6/0051 Primary

  Diffusing sheet or layer · CPC title

• G02B6/0061

  to provide homogeneous light output intensity · CPC title

• G02B6/0065

  Manufacturing aspects; Material aspects · CPC title

• G02B6/0068

  Arrangements of plural sources, e.g. multi-colour light sources · CPC title

• G02F1/133603 Primary

  with LEDs · CPC title