Backlight module and related manufacturing method and operation interface
AssigneeWistron Corporation
InventorsChih-Feng Yeh, Cheng-Ju Lee, Chia-Hung Chan
Life of this patent
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Abstract
A backlight module for an operation interface of a portable electronic device is disclosed. The operation interface includes at least one keypad. The backlight module includes a light guide film including at least one hole corresponding to the at least one keypad, a backlight board installed in the bottom of the light guide film for reflecting light, and a light emitting unit installed in a side of the light guide film for generating light source to inside of the light guide film, wherein the at least one hole of the light guide film is filled with a phosphor material.
Claims15
A backlight module for an operation interface of a portable electronic device, the operation interface comprising at least one keypad, the backlight module comprising:
- a light guide film, comprising at least one through hole corresponding to the at least one keypad, and filled with a phosphor material into the through hole;
- a backlight board, installed at a bottom of the light guide film, for reflecting light;
- and
- a light emitting unit, installed on a side of the light guide film, for receiving an intermittent power source to generate a light source to an inside of the light guide film;
- wherein the phosphor material comprises a first surface and a second surface, and according to the phosphor material being liquid with cooled-down and surface-tension dried formation or being powdery with hot pressing formation, the first surface is close to the backlight board and forms a concave down curve by viewing from the backlight board to the light guide film, and the second surface is away from the backlight board and forms a concave up curve by viewing from the backlight board to the light guide film.
A method of manufacturing a backlight module comprising:
- forming a light guide film;
- forming at least one through hole at a position corresponding to at least one keypad of an operation interface in the light guide film;
- filling the at least one through hole with a phosphor material;
- forming a backlight board at a bottom of the light guide film;
- and
- forming a light emitting unit on a side of the light guide film to receive an intermittent power source;
- wherein the phosphor material comprises a first surface and a second surface, and according to the phosphor material being liquid with cooled-down and surface-tension dried formation or being powdery with hot pressing formation, the first surface is close to the backlight board and forms a concave down curve by viewing from the backlight board to the light guide film, and the second surface is away from the backlight board and forms a concave up curve by viewing from the backlight board to the light guide film.
An operation interface for a portable electronic device comprising:
- at least one keypad;
- a backlight module comprising:
- a light guide film, comprising at least one through hole corresponding to the at least one keypad, and filled with a phosphor material;
- a backlight board, installed at a bottom of the light guide film, for reflecting light;
- and
- a light emitting unit, installed on a side of the light guide film, for generating a light source to an inside of the light guide film;
- a power supply device, for providing an intermittent power source to the light emitting unit;
- and
- a control circuit, for controlling the power supply device according to a pressing condition of the at least one keypad;
- wherein the phosphor material comprises a first surface and a second surface, and according to the phosphor material being liquid with cooled-down and surface-tension dried formation or being powdery with hot pressing formation, the first surface is close to the backlight board and forms a concave down curve by viewing from the backlight board to the light guide film, and the second surface is away from the backlight board and forms a concave up curve by viewing from the backlight board to the light guide film.
Dependencies are inferred from the claim text.