WO2020103386A1

WO2020103386A1 - Backlight device and display unit therefor

Info

Publication number: WO2020103386A1
Application number: PCT/CN2019/082670
Authority: WO
Inventors: 郭兆昆
Original assignee: 惠科股份有限公司
Priority date: 2018-11-22
Filing date: 2019-04-15
Publication date: 2020-05-28
Also published as: CN209525545U

Abstract

Disclosed are a backlight device and a display unit therefor. The backlight device comprises a back plate (200), a plurality of backlight sources (201), reflection sheets, an auxiliary light source (203), and an auxiliary reflection sheet (202), wherein the plurality of backlight sources (201) are arranged on the back plate (200), the plurality of backlight sources (201) are distributed in a matrix manner, the reflection sheets are arranged on the back plate (200), the positions of the reflection sheets correspond to the plurality of backlight sources (201), at least one auxiliary light source (203) is provided, the auxiliary light source (203) is arranged at an edge part of the back plate (200), the auxiliary reflection sheet (202) is arranged on the back plate (200), and the position of the auxiliary reflection sheet (202) corresponds to the auxiliary light source (203).

Description

Backlight equipment and display device

Technical field

The present application relates to the field of display technology, and in particular, to a backlight device and a display device thereof.

Background technique

The statements here only provide background information related to the present application and do not necessarily constitute prior art.

In the liquid crystal television industry, the backlight luminous body is mainly a direct light emitting diode (DLED) type. However, this direct backlight has some problems in the prior art. Most liquid crystal display devices usually have the problem that the light source cannot be fully illuminated at the peripheral edges or corners of the display panel because the light source illuminates from the light source of the array on the back panel of the backlight from bottom to top. The phenomenon of shadows, thus, leads to insufficient images when watching TV.

The traditional liquid crystal display uses a cold cathode fluorescent lamp as a backlight source, has poor color reproduction, and contains mercury vapor that is harmful to the human body. Nowadays, with the development of technology, it is gradually replaced by light-emitting diode (LED) backlight.

The backlight is divided into two types: direct type backlight and side type backlight. Side-lit backlight means that the light source is placed on the side of the product, and direct-lit backlight means that the light source is located directly under the product.

Direct-type backlights are generally thicker, usually more than 30mm thick, and the subjective display effect uniformity is about 70%, which can see more obvious brightness unevenness. Especially in the four corners, the brightness is low, and the light and dark intervals are abnormally obvious, resulting in the phenomenon of shadows.

In order to solve the above-mentioned defects, based on the direct backlight in the prior art, this case designs and manufactures a reflective sheet-type auxiliary light source, which can improve the problem of dark shadows in the four corners of the display screen and reduce the production cost as much as possible The main purpose urgently needed to be solved in the field of liquid crystal display technology.

Summary of the invention

In order to solve the above-mentioned defects, the purpose of the present application is to provide a backlight device and a display device thereof, on the premise of the original direct light source, by adding a reflective sheet-type auxiliary light source at the edge of the backplane, and by arranging the auxiliary light sources To achieve the purpose of improving the shadow of the four corners.

The purpose of this application and solving its technical problems are achieved by the following technical solutions. A backlight device proposed according to the present application includes: a backplane; a plurality of backlight sources arranged on the backplane, the plurality of backlight sources arranged in a matrix; a reflective sheet arranged on the backplane , The position corresponds to the plurality of backlight sources; the auxiliary light source is provided at the edge of the back plate; the auxiliary reflection sheet is provided on the back plate, and the position corresponds to the auxiliary light source.

In an embodiment of the present application, the number of configuration settings of the auxiliary light source is more than one.

In an embodiment of the present application, the auxiliary light source is disposed at more than one side of the surface edge of the backplane.

In an embodiment of the present application, the auxiliary light source is disposed on opposite sides of the surface edge of the backplane.

In an embodiment of the present application, the auxiliary light source is disposed on an adjacent side of the surface edge of the backplane.

In an embodiment of the present application, the auxiliary light source is disposed on all sides of the surface edge of the backplane.

In an embodiment of the present application, the position of the auxiliary light source is at more than one vertex position of the surface edge of the back plate.

In an embodiment of the present application, the auxiliary light source is disposed at a diagonal position of the surface edge of the backplane.

In an embodiment of the present application, the auxiliary light source is disposed adjacent to the top corner of the surface edge of the backplane.

In an embodiment of the present application, the auxiliary light source is disposed at all corner positions of the surface edge of the backplane.

In an embodiment of the present application, the auxiliary light sources are arranged at an edge of the back plate in an equidistant manner.

In an embodiment of the present application, the auxiliary light sources are arranged at the edge of the back plate in an unequal distance.

In an embodiment of the present application, the auxiliary light source is arranged at an edge of the back plate in a locally equidistant manner.

In an embodiment of the present application, the auxiliary light sources are arranged on the edge of the backplane. In the auxiliary light source array-type distributed arrangement, the distance between two adjacent auxiliary light sources is 40 mm to 60 mm.

In an embodiment of the present application, the number of the auxiliary light sources is set according to the proportion of the corresponding side length of the backplane.

In an embodiment of the present application, the auxiliary light sources are distributed and arranged in a horizontally arranged manner with an upper and lower displacement.

In an embodiment of the present application, the auxiliary light sources are distributed and arranged in a longitudinally arranged manner with a left-right displacement.

In an embodiment of the present application, the backlight and the auxiliary light source are both light emitting diodes (LEDs).

In an embodiment of the present application, the plurality of backlight sources are arranged in a matrix.

Another object of the present application is a display device, including: a panel; a driving device; a backlight device according to any one of the foregoing, the backlight device being controlled by the driving device to provide a light source to the panel.

In an embodiment of the present application, the driving device is to complete the conversion from an analog signal to a digital signal (or from a digital signal to another digital signal), and drive the LCD screen under the control of the image control unit Function module for displaying images.

In an embodiment of the present application, the plurality of backlight sources are composed of LED light bars. The LED light bars are generally elongated substrates composed of a plurality of LEDs arranged in a row, and the distance between the two LED light sources equal.

In this application, by providing an auxiliary light source and a reflective sheet, the defects of peripheral shadows can be improved, including the sides and four corners, the display brightness of the light at the edges is improved, and the entire display area is displayed more uniformly. This application does not need to significantly change the production process, and is applicable to all types of liquid crystal display devices with direct light sources, and has relatively high practicality.

BRIEF DESCRIPTION

In order to more clearly explain the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, so they are not It should be regarded as a limitation on the scope. For those of ordinary skill in the art, without paying any creative work, other related drawings can be obtained based on these drawings.

FIG. 1 is an arrangement diagram of backlight sources of an exemplary direct type backlight device;

2 is a distribution diagram of auxiliary light sources on a backplane according to an embodiment of the application;

3 is a distribution diagram of auxiliary light sources adjacent to a side of a backplane according to an embodiment of the present application;

4 is a distribution diagram of auxiliary light sources on opposite sides of a backplane according to an embodiment of the present application;

5a and 5b are distribution diagrams of auxiliary light sources on multiple sides of a backplane according to an embodiment of the present application;

6 is a distribution diagram of auxiliary light sources near the top angle of the backplane according to an embodiment of the present application;

7 is a distribution diagram of auxiliary light sources at a relative top angle of a backplane according to an embodiment of the present application;

8a and 8b are distribution diagrams of auxiliary light sources at multiple top angles of the edge of the backplane according to an embodiment of the present application;

9a and 9b are dislocation layout diagrams of newly added auxiliary light sources at the edge of the backplane according to an embodiment of the present application;

10 is a diagram of the relationship between the length-width ratio of the backplane and the number of auxiliary light sources according to an embodiment of the application;

11 is a structural diagram of a display device according to an embodiment of the application.

detailed description

The descriptions of the following embodiments refer to the attached drawings to illustrate specific embodiments that can be implemented in the present application. Directional terms mentioned in this application, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", etc., are for reference only Attach the direction of the schema. Therefore, the directional language used is to illustrate and understand this application, not to limit this application.

The drawings and description are to be regarded as illustrative in nature and not restrictive. In the figure, units with similar structures are indicated by the same reference numerals. In addition, for understanding and ease of description, the size and thickness of each component shown in the drawings are arbitrarily shown, but the present application is not limited thereto.

In addition, in the specification, unless expressly described to the contrary, the word "comprising" will be understood to mean including the stated components, but does not exclude any other components. In addition, in the specification, "on" means to be located above or below the target component, and does not mean that it must be located on the top based on the direction of gravity.

To further elaborate on the technical means and effects adopted by the present application to achieve the intended application purpose, the following describes the specific implementation, structure, and structure of the direct-type backlight device and display device proposed in accordance with the present application in conjunction with the drawings and specific embodiments. Features and functions are explained in detail as follows.

Please refer to FIG. 1 for an arrangement diagram of backlight sources of an exemplary direct-type backlight device. The backplane 200 and the direct-type backlight sources 201 disposed on the backplane 200 are arranged in a matrix. However, the thickness of the direct backlight is too large, resulting in uneven display brightness of the display device, especially the four top corner positions, which cannot achieve the brightness conditions required for display, resulting in the problem of dark shadows at the four corners.

FIG. 2 is a distribution diagram of auxiliary light sources on a backplane according to an embodiment of the application. In an embodiment of the present application, a backlight device includes: a backplane 200; a plurality of backlight sources 201 disposed on the backplane 200, the plurality of backlight sources arranged in a matrix; a reflective sheet, It is provided on the back plate 200 at a position corresponding to the multiple backlights; an auxiliary light source 203 is provided on the back plate 200, and the auxiliary light source 203 is provided at an edge of the back plate 200; The reflection sheet is disposed on the back plate 200, and the position corresponds to the auxiliary light source.

In an embodiment of the present application, referring to FIG. 2, the number of configurations of the auxiliary light source 203 is more than one, and the number is not limited to a limited value.

In an embodiment of the present application, the auxiliary light source 203 is disposed at one or more side positions of the surface edge of the backplane 200.

FIG. 3 is a distribution diagram of auxiliary light sources adjacent to a side of a backplane according to an embodiment of the present application. In an embodiment of the present application, the auxiliary light source 203 is disposed on the adjacent side of the surface edge of the backplane 200, for example, the auxiliary light source 203 is disposed on the left side and the upper side of the edge of the backplane 200 , But not limited to this location.

4 is a distribution diagram of auxiliary light sources on opposite sides of a backplane according to an embodiment of the present application. In an embodiment of the present application, the auxiliary light source 203 is disposed on opposite sides of the surface edge of the backplane 200, as shown in FIG. 4, on the left and right opposite sides of the edge of the backplane 200 of the display device The auxiliary light source 203 is provided on the side, but it is not limited to this arrangement.

5a and 5b are distribution diagrams of auxiliary light sources on multiple sides of a backplane according to an embodiment of the present application. In an embodiment of the present application, the auxiliary light source 203 is disposed on the edge of the surface of the backplane 200 Multi-side or all sides, as shown in FIGS. 5a and 5b, a reflective sheet 202 and an auxiliary light source 203 are provided on the multi-sided sides of the edge of the back plate 200 of the display device; in particular, as shown in FIG. 5a, it is not limited to this type Arrangement setting method.

FIG. 6 is a distribution diagram of auxiliary light sources near the top angle of a backplane according to an embodiment of the present application. In an embodiment of the present application, the auxiliary light source 203 is disposed adjacent to the top corner of the surface edge of the backplane 200, as shown in FIG. 6, at the upper left of the left edge of the backplane 200, The auxiliary light source 203 and the reflective sheet 202 are newly added near the top left corner, but it is not limited to this arrangement method.

FIG. 7 is an auxiliary light source distribution diagram of the relative top angle of the backplane according to an embodiment of the present application. In an embodiment of the present application, the auxiliary light source 203 is disposed at a relative top corner of the edge of the surface of the backplane 200, as shown in FIG. 7, at the upper left of the edge of the backplane 200 of the display device and The auxiliary light source 203 is provided at the lower right relative to the top corner, but it is not limited to this top corner position.

8a and 8b are distribution diagrams of auxiliary light sources at multiple vertex angles on the edge of the backplane according to an embodiment of the present application. In an embodiment of the present application, with reference to 8a, 8b, the position of the auxiliary light source is at more than one vertex position of the edge of the backplane of the backplane 200.

As shown in FIGS. 8a and 8b, in an embodiment of the present application, the auxiliary light source 203 is disposed at a plurality of or all corner positions of the edge of the backplane 200 of the backplane 200; in particular, reference In FIG. 8a, the arrangement and arrangement of the multiple top corners are not limited to this type.

9a and 9b are dislocation layout diagrams of newly added auxiliary light sources at the edge of the backplane according to an embodiment of the present application. In an embodiment of the present application, the auxiliary light sources 203 are arranged in a horizontal arrangement and vertically displaced, as shown in FIG. 9a, the auxiliary light sources 203 are arranged in a horizontal arrangement and vertically displaced, but not limited to This arrangement is distributed.

As shown in FIG. 9b, in an embodiment of the present application, the auxiliary light sources 203 are arranged in a longitudinal arrangement with left and right dislocations, but are not limited to this arrangement.

FIG. 10 is a diagram of the relationship between the length-to-width ratio of the backplane and the number of auxiliary light sources according to an embodiment of the application. In an embodiment of the present application, the number of the auxiliary light sources 203 is set according to the ratio of the corresponding side length of the backplane 200. As shown in FIG. 10, the length of the backplane 200 is b and the width is a. a: b = 6: 10, therefore, the number of auxiliary light sources 203 provided on the left side of the edge of the backplane 200 is 6 and the number of auxiliary light sources 203 provided on the upper side is 10, but Not limited to this number.

In an embodiment of the present application, the auxiliary light sources are disposed at the edge of the back plate 200. In the distribution of the auxiliary light sources 203, the distance between two adjacent auxiliary light sources 203 is 40 mm to 60 mm.

In an embodiment of the present application, the auxiliary light sources 203 are arranged at an edge of the back plate 200 in an equidistant manner, and the distance between two adjacent auxiliary light sources is 50 mm, but is not limited thereto.

In an embodiment of the present application, the auxiliary light source 203 is arranged at an edge of the back plate 200 in an unequal distance, and the distance between two adjacent auxiliary light sources is 40 mm to 60 mm, for example, 40 mm , 42m, 44mm, 46mm, 48mm, 50mm.

In an embodiment of the present application, the auxiliary light source 203 is arranged at the edge of the back plate 200 in a partially equidistant manner, for example, the auxiliary light source has an equidistant distance of 50 mm, and an unequal distance other than 50 mm Note that the distance between two adjacent auxiliary light sources is 40mm to 60mm.

In an embodiment of the present application, the light sources are all light emitting diodes (LEDs).

11 is a structural diagram of a display device according to an embodiment of the application. In an embodiment of the present application, the liquid crystal display device includes: a panel 303; a driving device 301; a backlight device 302 according to any one of the foregoing, the backlight device 302 is controlled by the driving device 301 To provide a light source to the panel 303.

In an embodiment of the present application, the driving device 301 completes the conversion from an analog signal to a digital signal (or from one digital signal to another digital signal), and drives it under the control of the image control unit LCD screen display module; LCD screen driver board usually contains the main control chip, MCU microcontroller, ROM memory, power supply module, power supply interface, VGA video signal input interface, OSD key board interface, high voltage board interface, LVDS / TTL drive screen signal interface and other parts; the principle of the LCD screen drive board: the video signal sent from the computer host display card is sent to the main control chip of the drive board through the VGA video signal input interface on the drive board. Information about the LCD screen in the MCU microcontroller controls the LCD screen to display images.

In this application, by providing an auxiliary light source and a reflective sheet, the defects of peripheral shadows can be improved, including the sides and four corners, the display brightness of the light at the edges is improved, and the entire display area is displayed more uniformly. This application does not need to significantly change the manufacturing process, and is applicable to all types of liquid crystal display devices with direct light sources. The practicality is relatively high, so it has industrial practicality.

The terms "in some embodiments" and "in various embodiments" are used repeatedly. The term generally does not refer to the same embodiment; but it can also refer to the same embodiment. The terms "comprising", "having" and "including" are synonyms unless the context before and after shows other meanings.

The above are only examples of this application, and are not intended to limit this application in any way. Although this application has been disclosed above with specific embodiments, it is not intended to limit this application. Any person skilled in the art, Without departing from the scope of the technical solution of the present application, when the technical contents disclosed above can be used to make some changes or modifications to equivalent embodiments of equivalent changes, but any content that does not deviate from the technical solution of the present application, based on the technical essence Any simple modifications, equivalent changes, and modifications made to the above embodiments still fall within the scope of the technical solution of the present application.

Claims

A backlight device, including:

Backplane

A plurality of backlight sources are arranged on the backplane, and the plurality of backlight sources are arranged in a matrix;

The reflection sheet is arranged on the back plate, and the position corresponds to the plurality of backlight sources;

The auxiliary light source is provided at the edge of the back plate;

The auxiliary reflection sheet is arranged on the back plate, and the position corresponds to the auxiliary light source.
The backlight device according to claim 1, wherein the number of configurations of the auxiliary light source is more than one.
The backlight device according to claim 1, wherein the plurality of backlight sources and the auxiliary light sources are light emitting diodes.
The backlight device according to claim 1, wherein the auxiliary light source is disposed at one or more side positions of the surface edge of the back plate.
The backlight device according to claim 4, wherein the auxiliary light source is disposed on an opposite side of the surface edge of the backplane.
The backlight device according to claim 4, wherein the auxiliary light source is disposed on an adjacent side of the surface edge of the back plate.
The backlight device according to claim 4, wherein the auxiliary light source is provided on all sides of the surface edge of the back plate.
The backlight device according to claim 1, wherein the auxiliary light source is disposed at one or more corner positions of the surface edge of the back plate.
The backlight device according to claim 8, wherein the auxiliary light source is disposed at a diagonal position of the surface edge of the back plate.
The backlight device according to claim 8, wherein the auxiliary light source is disposed at an adjacent vertex angle position of the surface edge of the back plate.
The backlight device according to claim 8, wherein the auxiliary light source is disposed at all corner positions of the surface edge of the back plate.
The backlight device according to claim 2, wherein, when the number of the auxiliary light sources is more than one, they are arranged at an edge of the back plate in an equidistant manner.
The backlight device according to claim 2, wherein when the number of the auxiliary light sources is more than one, the auxiliary light sources are arranged at unequal intervals at the edge of the back plate.
The backlight device according to claim 1, wherein the number of the auxiliary light sources is set according to a ratio of the corresponding side lengths of the backplane.
The backlight device according to claim 1, wherein the auxiliary light sources are distributed and arranged in a horizontally arranged manner with an upper and lower displacement.
The backlight device according to claim 1, wherein the auxiliary light sources are arranged in a longitudinally arranged manner with a left-right displacement.
A display panel, including a backlight device, the backlight device includes:

Backplane

A plurality of backlight sources are arranged on the backplane, and the plurality of backlight sources are arranged in a matrix;

The reflection sheet is arranged on the back plate, and the position corresponds to the plurality of backlight sources;

The number of auxiliary light sources is more than one, and they are arranged at the edge of the back plate;

Auxiliary reflection sheet is provided on the back plate, and the position corresponds to the auxiliary light source;

Wherein, the number of the auxiliary light sources is set according to the proportion of the corresponding side length of the back plate, and is set at the edge of the back plate in an equidistant or unequal distance.
A display device, including:

Panel, including backlight equipment and driving equipment;

The backlight device includes a backplane; and

A plurality of backlight sources are arranged on the backplane, and the plurality of backlight sources are arranged in a matrix;

The reflection sheet is arranged on the back plate, and the position corresponds to the plurality of backlight sources;

The number of auxiliary light sources is more than one, and they are arranged at the edge of the back plate;

Auxiliary reflection sheet is provided on the back plate, and the position corresponds to the auxiliary light source;

Wherein, the number of the auxiliary light sources is set according to the proportion of the corresponding side length of the backplane, and is set at the edge of the backplane in an equidistant or non-equidistant manner;

Wherein, the number of the auxiliary light sources is set according to the proportion of the corresponding side length of the back plate, and is arranged at the top corner of the surface edge of the back plate in an adjacent or opposite angle manner.