TWI775250B - Backlight module - Google Patents

Abstract

A backlight module is applied to a lighting touch pad of an electronic device, and the lighting touch pad is disposed on a casing of the electronic device. The backlight module includes a light guide plate, a reflection plate and a circuit board. The light guide plate is disposed under a top cover of the lighting touch pad. The reflection plate is disposed under the light guide plate and painted by the same color as the casing. The circuit board is disposed under the reflection plate and has at least one light unit. The light unit is disposed on a side of the light guide plate and emits a beam into the light guide plate for illumination of the top cover. The top cover is made by high transparency material.

Description

Backlight Module

The present invention provides a backlight module, especially a backlight module with better luminous brightness.

With the vigorous development of the gaming industry, gaming notebook computers will design touchpads with light-emitting functions on the operation interface, but notebook computers are required to have a consistent visual appearance, which means that the color of the touchpad should be the same or similar to The color of the shell of the notebook computer. The color of the shell is usually dark color such as black, gray or dark blue; if the touch panel is also coated with dark pigment on its top cover, it is necessary to increase the number of light-emitting units of the backlight module to provide sufficient brightness. However, increasing the number of light-emitting units not only increases product cost significantly, but also requires higher power consumption and correspondingly additional heat dissipation elements. Therefore, how to design a backlight module and a light-emitting touch panel that can improve the brightness without increasing the number of light-emitting units is the development goal of the related notebook industry.

The present invention provides a backlight module with better luminous brightness to solve the above problems.

The scope of the patent application of the present invention is to disclose a backlight module applied to a light-emitting touch panel of an electronic device, and the light-emitting touch panel is disposed in a casing of the electronic device. The backlight module contains There is a light guide plate, a reflection plate and a circuit substrate. The light guide plate is arranged under a top cover of the light-emitting touch panel. The reflection plate is arranged under the light guide plate. The reflector is coated with pigments of the same color as the shell. The circuit substrate is arranged under the reflector. The circuit substrate has at least one light-emitting unit. The light-emitting unit is located on one side of the light guide plate, and is used for outputting light to enter the light guide plate to illuminate the top cover. The top cover is made of high light transmittance material.

The scope of the patent application of the present invention further discloses a backlight module applied to a light-emitting touch panel of an electronic device, and the light-emitting touch panel is disposed in a casing of the electronic device. The backlight module includes a protection plate, a light guide plate and a circuit substrate. The protection plate is arranged under a top cover of the light-emitting touch panel. The protective plate is coated with a pigment of the same color as the shell. The light guide plate is arranged under the protection plate. The circuit substrate is arranged under the light guide plate. The circuit substrate has at least one light-emitting unit located on one side of the light guide plate for outputting light into the light guide plate to illuminate the top cover. The top cover is made of high light transmittance material.

The scope of the patent application of the present invention further discloses a backlight module applied to a light-emitting touch panel of an electronic device, and the light-emitting touch panel is disposed in a casing of the electronic device. The backlight module includes a light guide plate and a circuit substrate. The light guide plate is arranged under a top cover of the light-emitting touch panel. The circuit substrate is arranged under the reflector. The circuit substrate has at least one light-emitting unit located on one side of the light guide plate for outputting light into the light guide plate to illuminate the top cover. The top cover is made of dark but highly transparent material.

The present invention improves the light transmittance of the top cover and adjusts the coating color of the protective plate and/or reflective plate of the backlight module, so that the light-emitting touch panel can still have high brightness under the condition of providing bright backlight. Consistent with the appearance of dark shells. The top cover of the first embodiment is a transparent or light-colored material with high light transmittance If the material is used, the backlight module will coat the reflector with dark pigment to provide a dark appearance consistent with the shell. The top cover of the second embodiment is also a transparent or light-colored material with high light transmittance, and the backlight module coats the protective plate with dark pigments to provide a dark appearance consistent with the shell. The top cover of the third embodiment is designed to be a dark material with high light transmittance, and the backlight module does not need to additionally coat the reflective plate and/or the protective plate with dark pigments.

10: Electronics

12: The first shell

14: Second shell

16: Illuminated trackpad

18, 18A, 18B: Backlight module

20: top cover

22: Opening

24: light guide plate

26: Reflector

28: Protective plate

30: circuit substrate

32: Lighting unit

34: Sensor Array

36: Protective plate

38: Light guide plate

40: Light-colored reflector

42: circuit substrate

44: Lighting unit

46: Sensor array

48: light guide plate

50: circuit substrate

52: Light-colored reflector

54: Protective plate

56: Lighting unit

58: Sensor Array

FIG. 1 is an exploded view of the components of the electronic device according to the embodiment of the present invention.

FIG. 2 is an exploded view of the components of the backlight module according to the first embodiment of the present invention.

FIG. 3 is an exploded view of the components of the backlight module according to the second embodiment of the present invention.

FIG. 4 is an exploded view of the components of the backlight module according to the third embodiment of the present invention.

Please refer to FIG. 1. FIG. 1 is an exploded view of the components of the electronic device 10 according to the embodiment of the present invention. A light-emitting touch panel 16 and a backlight module 18 may be disposed between the first casing 12 and the second casing 14 of the electronic device 10 . The top cover 20 of the light-emitting touch panel 16 can be fitted into the opening 22 of the first casing 12 for protecting the backlight module 18 . The light-emitting touch panel 16 can read the movement track of the target object to interpret its operation command. The light-emitting touch panel 16 can be matched with the design of the backlight module 18 to present the same color as the first casing 12 , so that the appearance of the electronic device 10 is consistent.

Please refer to FIG. 2 , which is an exploded view of the components of the backlight module 18 according to the first embodiment of the present invention. The backlight module 18 may include a light guide plate 24 , a reflection plate 26 , a protection plate 28 and a circuit substrate 30 . The light guide plate 24 may be disposed under the top cover 20 . The reflection plate 26 can be arranged under the light guide plate 24 and is coated with a pigment of the same color as the first shell 12 . The circuit substrate 30 may be provided under the reflection plate 26 . The circuit substrate 30 may have a Light unit 32 and sensor array 34 . The light emitting unit 32 can be located on one side of the light guide plate 24 , and the output light thereof can enter the light guide plate 24 and illuminate the top cover 20 with the assistance of the reflective plate 26 .

The protective plate 28 can be an optional accessory and is disposed on the top cover 20 and the light guide plate 24 , which means to cover and protect the light guide plate 24 , the reflector 26 , the protective plate 28 and the circuit substrate 30 below it. The protective plate 28 can preferably be coated with the same color pigment as the first shell 12 and the reflector 26 . The sensor array 34 can sense the proximity or contact of a target object (eg, a finger or a stylus, etc.), and may be a capacitive sensing module, a resistive sensing module or an inductive sensing module.

In the first embodiment, the top cover 20 is made of a high light transmittance material, such as a high light transmittance transparent material or a high light transmittance dark material. When the top cover 20 is made of a transparent material with high light transmittance, at least one of the reflection plate 26 and the protection plate 28 is coated with a pigment of the same color as the first shell 12, so that the appearance color of the light-emitting touch panel 16 can be improved. This corresponds to the first housing part 12 . If the top cover 20 is made of a dark material with high light transmittance, the dark material refers to the material of the same color as the first shell 12 . At this time, the appearance color of the light-emitting touch panel 16 can be consistent with the first cover 20 because of the top cover 20 . There is a shell 12 , so the reflector 26 and the protection plate 28 can be arbitrarily selected to be coated with the same color pigment as the first shell 12 .

Please refer to FIG. 3, which is an exploded view of the components of the backlight module 18A according to the second embodiment of the present invention. The backlight module 18 may include a protection plate 36 , a light guide plate 38 , a light-colored reflective plate 40 and a circuit substrate 42 . The protection plate 36 may be disposed under the top cover 20 and coated with a material of the same color as the first shell member 12 . The light guide plate 38 and the circuit substrate 42 may be disposed under the protection plate 36 . The circuit substrate 42 may have light emitting units 44 and a sensor array 46 . The light emitting unit 44 can be located on one side of the light guide plate 38 , and the output light thereof can enter the light guide plate 38 to illuminate the top cover 20 . The sensor array 46 can sense the proximity or contact of a target object (eg, a finger or a stylus, etc.).

The light-colored reflective plate 40 is an optional accessory, and is disposed between the light guide plate 38 and the circuit substrate 42 , so that the light from the light guide plate 38 to the top cover 20 can be relatively uniform. In the second embodiment, the top cover 20 can be made of a transparent material with high light transmittance; since the protective plate 36 has been coated with a material of the same color as the first shell 12 , the appearance color of the light-emitting touch panel 16 can be consistent with that of the first shell 12 . A shell 12 . If the top cover 20 is designed as a dark material with high light transmittance (the dark material refers to a material of the same color as the first shell 12 ), the protective plate 36 can be made of a light-colored or transparent material.

Please refer to FIG. 4 , which is an exploded view of the components of the backlight module 18B according to the third embodiment of the present invention. The backlight module 18 may include a light guide plate 48 , a circuit substrate 50 , a light-colored reflective plate 52 and a protection plate 54 . The light guide plate 48 may be disposed under the top cover 20 . The circuit substrate 50 is disposed under the light guide plate 48 . The circuit substrate 50 may have light emitting units 56 and a sensor array 58 . The light emitting unit 56 may be located on one side of the light guide plate 48 , and its output light may enter the light guide plate 48 and illuminate the top cover 20 . The sensor array 58 can sense the proximity or contact of a target object (eg, a finger or a stylus, etc.). The top cover 20 is made of a dark material with high light transmittance (the dark material refers to a material of the same color as the first shell 12 ).

In the third embodiment, the light-colored reflective plate 52 and the protective plate 54 are optional accessories. The light-colored reflective plate 52 can be disposed between the light guide plate 48 and the circuit substrate 50 to make the light from the light guide plate 38 to the top cover 20 more uniform. The protection plate 54 can be disposed between the top cover 20 and the light guide plate 48 to cover and protect the light guide plate 48 , the circuit substrate 50 and the light-colored reflective plate 52 . The light-colored reflective plate 52 and the protective plate 54 do not need to be coated with pigments of specific colors, and are preferably made of light-colored or transparent.

To sum up, the present invention improves the light transmittance of the top cover and cooperates with the protection of the backlight module. The coating color of the cover and/or the reflector is adjusted so that the light-emitting touch panel can still have the appearance of a dark shell under the condition of providing a high-brightness backlight. The top cover of the first embodiment is a transparent or light-colored material with high light transmittance, and the backlight module coats the reflector with dark pigments to provide a dark appearance consistent with the shell. The top cover of the second embodiment is also a transparent or light-colored material with high light transmittance, and the backlight module coats the protective plate with dark pigments to provide a dark appearance consistent with the shell. The top cover of the third embodiment is designed to be a dark material with high light transmittance, and the backlight module does not need to additionally coat the reflective plate and/or the protective plate with dark pigments.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention.

18: Backlight module

20: top cover

24: light guide plate

26: Reflector

28: Protective plate

30: circuit substrate

32: Lighting unit

34: Sensor Array

Claims (9)

A backlight module is applied to a light-emitting touch panel of an electronic device. The light-emitting touch panel is arranged in a shell of the electronic device. The backlight module includes: a light guide plate, which is arranged on the light-emitting touch panel. Below the top cover of one of the panels, the light guide plate provides a global luminous effect; a reflective plate is arranged under the light guide plate, the reflective plate is coated with paint of the same color as the shell; and a circuit substrate is arranged on the reflective plate Below the board, the circuit substrate has at least one light-emitting unit, the light-emitting unit is located on one side of the light guide plate for outputting light into the light guide plate to illuminate the top cover; wherein the top cover is made of high light transmittance material. The backlight module of claim 1, wherein the high light transmittance material is a transparent material, or a dark material with high transmittance. The backlight module according to claim 1, further comprising: a protection plate disposed between the light guide plate and the top cover. The backlight module of claim 3, wherein the protective plate is coated with the pigment of the same color as the shell. A backlight module is applied to a light-emitting touch panel of an electronic device, the light-emitting touch panel is arranged in a casing of the electronic device, and the backlight module includes: a protection plate, which is arranged on the light-emitting touch panel Below the top cover of one of the panels, the protective panel is coated with the same pigments of color series; a light guide plate, arranged under the protection plate; and a circuit substrate, arranged under the light guide plate, the circuit substrate has at least one light-emitting unit, located on one side of the light guide plate, for outputting light into the The light guide plate passes through the protection plate to illuminate the top cover; wherein the top cover is made of high light transmittance material. The backlight module of claim 5, wherein the high light transmittance material is a transparent material, or a dark material with high transmittance. The backlight module of claim 5, further comprising: a light-colored reflective plate disposed between the light guide plate and the circuit substrate. A backlight module is applied to a light-emitting touch panel of an electronic device. The light-emitting touch panel is arranged in a shell of the electronic device. The backlight module includes: a light guide plate, which is arranged on the light-emitting touch panel. below a top cover of the board; a circuit substrate disposed under the light guide plate, the circuit substrate having at least one light-emitting unit located on one side of the light guide plate for outputting light into the light guide plate to illuminate the top cover; and A protective plate is arranged between the light guide plate and the top cover, and is made of light-colored or transparent material; wherein the top cover is made of dark-colored material with high transmittance. The backlight module according to claim 8, further comprising: a light-colored reflective plate disposed between the light guide plate and the circuit substrate.

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