CN209215818U - Backlight module and instrument board - Google Patents

Abstract

This application involves a kind of backlight module and instrument boards.Wherein.Backlight module includes: luminescence unit, including multiple primary colors light source and secondary colour backlight is provided；Primary light source includes first light source, and first light source is in parallel with other primary light sources in luminescence unit, and first light source provides the first back；Second light source, brightness that is in parallel with first light source and enhancing the first backlight.The application can effectively improve backlight display brightness.

Description

Backlight module and instrument board

Technical field

This application involves technical field of electronic equipment, more particularly to a kind of backlight module and instrument board.

Background technique

With the development of science and technology, there is backlight display technology.Backlight display refers to when user uses electronic equipment When, the display screen on fuselage issues backlight, more clearly to show content.Backlight display technology can use the conducts such as LED Light source.

It is equipped with backlight module in some electronic equipments (such as instrument board), and then is clearly shown by backlight technology Show.In order to improve display clarity, multiple primary colors (such as feux rouges, turquoise, blue light three primary colours) light source is usually arranged in backlight module The luminescence unit of formation, so allow luminescence unit by multiple primary colors mixing issue readily identified secondary colour (such as White) backlight.Meanwhile backlight module can also usually be arranged various primary colours and backlight is provided separately, and allow user according to a People likes and selects backlight color.

But in order to be mixed into secondary colour (such as white), the brightness design of some primary colours (such as blue) light sources is not up to To the brightness of user demand.This results in user when selecting the primary colours to provide backlight, inconvenient for use.

Utility model content

Based on this, it is necessary in view of the above technical problems, provide a kind of backlight module that can be improved backlight display brightness And instrument board.

A kind of backlight module characterized by comprising

Luminescence unit, including multiple primary colors light source is to provide secondary colour backlight；The primary light source includes first light source, institute It is in parallel with other primary light sources in the luminescence unit to state first light source, and the first light source provides the first backlight；

Second light source, it is in parallel with the first light source and enhance the brightness of first backlight.

First light source brightness in a variety of primary light sources is minimum in one of the embodiments,.

The luminescent color phase of the luminescent color of the second light source and the first light source in one of the embodiments, Together.

In one of the embodiments, the luminescence unit it is in parallel with the second light source and provide the first auxiliary backlight.

Other at least one described primary light sources are in parallel with the second light source and be provided in one of the embodiments, The second auxiliary backlight of few one kind.

It is connected in parallel between the various primary light sources in other described primary light sources in one of the embodiments, every kind The primary light source is set as providing corresponding color backlight.

The secondary colour is white in one of the embodiments,.

The luminescence unit includes three kinds of primary light sources in one of the embodiments, three kinds of primary light sources difference For emitting red light light source, green emitting light source and blue-light-emitting light source, the first light source is blue-light-emitting light source.

The second light source is blue-light-emitting light source in one of the embodiments,.

A kind of instrument board, including backlight module described in any of the above embodiments and the display illuminated by the backlight module Screen.

Above-mentioned backlight module, the first light source of luminescence unit can also provide first other than synthesizing secondary colour backlight Backlight.Meanwhile backlight module is provided with the second light source in parallel with first light source, so that client provides the in selection first light source When one backlight, the brightness of the first backlight is effectively increased.Therefore, the application can effectively improve backlight display brightness.

Detailed description of the invention

Fig. 1 is that instrument board schematic diagram is instrument board schematic diagram in one embodiment in one embodiment；

Fig. 2 is the schematic diagram of Fig. 1 dashed rectangle portion amplification；

Fig. 3 is backlight module circuit diagram in one embodiment；

Fig. 4 is backlight module circuit diagram in another embodiment；

Fig. 5 is backlight module circuit diagram in another embodiment.

Specific embodiment

It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, not For limiting the application.

Instrument board provided by the present application can be the instrument board on various vehicles, naturally it is also possible to for for other electricity Instrument board in son setting.

In one embodiment, it with reference to Fig. 1, provides a kind of instrument board, including display screen 100 and illuminates display screen 100 backlight module 200.Display screen 100 can be liquid crystal display, naturally it is also possible to it is other kinds of display screen, such as Organic light emitting display etc..On the display screen 100 of instrument board can so that various patterns and data display.Backlight module 200 for illuminating display screen so that the display content on display screen can be clearly displayed under the illuminating of backlight module 200 in User at the moment, and then observes the display registration etc. that instrument board is shown convenient for user.

In one embodiment, with reference to Fig. 2, backlight module 200 includes luminescence unit 210.Luminescence unit 210 includes a variety of Primary light source, can be on a chip comprising multiple primary colors light source.Every kind of primary light source can issue corresponding color Light.Each primary light source can be LED light source or other kinds of illuminating source.The multiple primary colors light source of luminescence unit can be same Shi Faguang is mixed into secondary colour in turn, and then provides secondary colour backlight.In order to enable secondary colour backlight is more uniform, can be set Various primary light sources are uniformly arranged at equal intervals.

With reference to Fig. 2 and Fig. 3, primary light source may include first light source 211.First light source 211 is set as and other bases Color light source 212 is in parallel, so that first light source 211 while having the function of synthesizing secondary colour backlight, also has independent The effect of first backlight is provided.Can connect between other primary light sources 212, can also in parallel or sections in series part simultaneously Connection, there is no restriction to this by the application.

At the same time, the application backlight module further includes second light source 220.Second light source 220 and first light source 211 are simultaneously Connection.First light source 211 shines when providing the first backlight with second light source 220 simultaneously, and then can effectively enhance the first back The brightness of light.Second light source 220 can be on a single colored chip, which can mount to where luminescence unit 210 Chip.

In order to enable shining uniformly, second light source 220 should be as close as possible to luminescence unit 210.Specifically, luminescence unit 210 Two avris in instrument board can be set, and then provide light distribution from side for instrument board.Multiple primary colors light in luminescence unit Source can be arranged successively along the extending direction of two avris of instrument board.Meanwhile second light source 220 can be attached at the list that shines Member 210, and the extending direction of two avris together with the multiple primary colors light source of luminescence unit 210 along instrument board is successively equal Even arrangement, and then improve backlight uniformity.Certainly, the setting form of the luminescence unit 210 and second light source 220 of the application Can unlike this, the application is not limited thereto system.

The secondary colour that luminescence unit 210 issues can be white.With reference to Fig. 2, at this point it is possible to which the packet of luminescence unit 210 is arranged Include three kinds of primary light sources.Three kinds of primary light sources 100 are respectively emitting red light light source R, green emitting light source G and blue-light-emitting light Source B.Emitting red light light source R, green emitting light source G and blue-light-emitting light source B can simply and easily synthesize white light.

At this point, first light source 211 can be blue-light-emitting light source B.In order to be able to achieve the synthesis of white light, emitting red light light The ratio between the light emission luminance of source R, the light emission luminance of green emitting light source G and light emission luminance of blue-light-emitting light source B can design For 1:3:8 or 1:N:N (N is greater than 1).That is, in order to which the secondary colour backlight of white, blue-light-emitting light can be formed upon mixing The brightness of source B is usually minimum.So when user does not select secondary colour backlight (white backlight), and select first light source 211 When (blue-light-emitting light source B) issues backlight, it may appear that the problem of backlight illumination is insufficient, and display content is less susceptible to identification.At this point, One second light source 220 is set again on backlight module, so that second light source and first light source 211 shine simultaneously and provide the first back Light can effectively increase the brightness of not the first backlight, so that display content is clearly effectively identified.

Certainly, in the embodiment of the present application, secondary colour may be other colors (such as yellow) in addition to white, this Apply not restricted to this.Meanwhile when colour mixture color is white, the primary light source for synthesizing secondary colour is also not limited to red hair Radiant R, green emitting light source G and tri- kinds of blue-light-emitting light source B, such as it can also be Yellow luminous light source and green hair Radiant etc..

When the usual minimum primary light source of brightness is individually shown, it may appear that luminance shortage and be difficult to distinguish showing for display content As.Therefore, the primary light source (such as above-mentioned blue-light-emitting light source B) that first light source 211 can be minimum for brightness can be set.When So, in the embodiment of the present application, the primary light source that first light source 211 can not also be minimum for brightness, but according to the tool of client There are colour brightness demand and circuit facilities etc. to be set.

In one embodiment, the luminescent color with first light source 211 can be set into the luminescent color of second light source 220 It is identical.At this point, on the one hand effectively increasing the brightness of the first backlight of the offer of first light source 211, on the other hand it is also possible that The color for the first backlight that first light source 211 provides is maintained identical as the luminescent color of first light source 211.Work as first light source 211 when brightness is minimum in multiple primary colors light source, and the luminescent color of second light source 220 can be set into and first light source 211 Luminescent color is identical, and instrument board is allowed to maintain color display mode when not adding second light source 220, while guaranteeing again assorted The brightness of backlight is enough.Certainly, in other embodiments, the luminescent color of second light source 220 also can be set into and the first light The luminescent color in source 211 is different.

In one embodiment, with reference to Fig. 4, luminescence unit 210 is in parallel with second light source 220 and provides the first auxiliary back Light.Luminescence unit 210 can issue colour mixture color (such as white) light, and second light source 220 can issue another color (such as blue) Light.The two is in parallel and when shining simultaneously, secondary colour can be made further to mix with another color, and then formation first is auxiliary It helps backlight (such as light blue backlight), and then the color category of abundant backlight.

In one embodiment, second light source 220 can also be with other at least one 212 (such as emitting red lights of primary light source Light source R and/or green emitting light source G) it is in parallel.At this point it is possible to make other at least one primary light sources 212 and second light source 220 shine simultaneously, and then form the second auxiliary backlight, and then the color category of abundant backlight.

In one embodiment, it with reference to Fig. 5, is connected in parallel between other primary light sources 212.First light source 211 also with hair Other primary light sources 212 in light unit 210 are in parallel.So in the present embodiment, the various primary light sources of luminescence unit 210 It is connected in parallel.Every kind of primary light source 112 is set as providing corresponding color backlight, so that the color category of backlight is richer It is rich.

In the present embodiment, first light source 211 it is also in parallel with second light source 220 and issue the first backlight.Therefore, it shines single Various other primary light sources 212 of member 210 are also connected in parallel with second light source 220, and then can control various other primary lights Source 212 and second light source 220 shine simultaneously and provide more backlight colors.

In conclusion backlight module provided by the present application, the first light source 211 of luminescence unit is in addition to synthesizing secondary colour backlight In addition, the first backlight can also be provided.Meanwhile backlight module is provided with the second light source 220 in parallel with first light source 211, makes Client is obtained when selecting first light source 211 to provide the first backlight, the brightness of the first backlight effectively increases.Therefore, the application can have Effect improves backlight display brightness.

Each technical characteristic of above embodiments can be combined arbitrarily, for simplicity of description, not to above-described embodiment In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance Shield all should be considered as described in this specification.

The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously The limitation to utility model patent range therefore cannot be interpreted as.It should be pointed out that for the ordinary skill people of this field For member, without departing from the concept of this application, various modifications and improvements can be made, these belong to the application's Protection scope.Therefore, the scope of protection shall be subject to the appended claims for the application patent.

Claims (10)

1. a kind of backlight module characterized by comprising

Luminescence unit, including multiple primary colors light source is to provide secondary colour backlight；The primary light source includes first light source, and described One light source is in parallel with other primary light sources in the luminescence unit, and the first light source provides the first backlight；

Second light source, it is in parallel with the first light source and enhance the brightness of first backlight.

2. backlight module according to claim 1, which is characterized in that the first light source is in a variety of primary light sources Brightness is minimum.

3. backlight module according to claim 1, which is characterized in that the luminescent color of the second light source and described first The luminescent color of light source is identical.

4. backlight module according to claim 1, which is characterized in that the luminescence unit it is in parallel with the second light source and First auxiliary backlight is provided.

5. backlight module according to claim 1, which is characterized in that other at least one described primary light sources and described the Two light sources are in parallel and provide at least one second auxiliary backlight.

6. backlight module according to claim 1, which is characterized in that the various primary light sources in other described primary light sources Between be connected in parallel, every kind of primary light source be set as provide corresponding color backlight.

7. backlight module according to any one of claims 1 to 6, which is characterized in that the secondary colour is white.

8. backlight module according to claim 7, which is characterized in that the luminescence unit includes three kinds of primary light sources, institute Stating three kinds of primary light sources is respectively emitting red light light source, green emitting light source and blue-light-emitting light source, and the first light source is Blue-light-emitting light source.

9. backlight module according to claim 8, which is characterized in that the second light source is blue-light-emitting light source.

10. a kind of instrument board, which is characterized in that including the described in any item backlight modules of claim 1-9 and by the back The display screen that optical module illuminates.