CN202632727U

CN202632727U - Liquid crystal display screen backlight model with local dimming function

Info

Publication number: CN202632727U
Application number: CN 201220239293
Authority: CN
Inventors: 史跃林
Original assignee: Dongguan Konka Electronics Co Ltd
Current assignee: Dongguan Konka Electronics Co Ltd
Priority date: 2012-05-25
Filing date: 2012-05-25
Publication date: 2012-12-26
Anticipated expiration: 2022-05-25

Abstract

The utility model relates to the technical field of a liquid crystal display television, in particular to a liquid crystal display screen backlight model with a local dimming function. The liquid crystal display backlight model is provided with four circuit boards of a power board, a machine core main board, an integrated light-emitting diode (LED) drive board and a timer controller register (TCON) board and an upper LED light bar and a lower light bar which are respectively arranged on the upper side and the lower side of a screen body, the LED of each light bar is divided into eight groups, and every group is driven independently. The technology of two dimensional local dimming is achieved on a side-emitting LED backlight, so that power consumption is greatly lowered, contrast ratio of a display picture is improved, ghost shadow is decreased, and meanwhile a direct type LED backlight slim design which is difficult to achieve is achieved, namely eat the cake and have the cake.

Description

Liquid crystal display module backlight with local dimming function

Technical field

The utility model relates to the liquid crystal tv technology field, especially relates to a kind of liquid crystal display module backlight.

Background technology

At present, the use of LCD TV more and more widely in daily life, occupy more and more important position, and the energy of its consumption also more and more causes people's attention.Therefore, each TV, liquid crystal manufacturer all drop into great material resources, manpower, financial resources and strengthen research and development strength and go to reduce power consumption, from technology trends, how to reduce power consumption backlight and receive publicity most.Because backlight is maximum energy depleter, reduced power consumption backlight, also just greatly reduce the power consumption of complete machine.This technology wherein comprises the driving circuit that improves backlight, improves the luminescence efficiency of LED, develops new LED kind, and at present, Local Dimming (local dimming) is easy in these technology realize the most tangible technology of effect most.Especially direct-light type LED backlight collocation Local Dimming technology can reduce electric weight, raising display frame correlative value, grey exponent number significantly, reach and reduce ghost etc.It is thin that but the shortcoming that direct-light type LED backlight collocation 2D Local Dimming technology exists is that module thickness backlight is difficult to do, and causes the LCD TV product thick partially.

Summary of the invention

The purpose of the utility model is to provide a kind of both can realize local dimming, can realize the liquid crystal display module backlight of the ultrathin design that direct LED backlight is difficult to realize again.

For achieving the above object, the utility model adopts following technical scheme:

Liquid crystal display module backlight with local dimming function; Have four circuit boards on this liquid crystal display module backlight: power panel, movement mainboard, integrated LED drive plate, TCON plate; And the last LED lamp bar and following LED lamp bar that are installed in screen body upper and lower sides respectively; LED in each lamp bar is divided into eight groups, every group of drive.

Said integrated LED drive plate includes local dimming controller and pure led drive circuit; The local dimming controller is made up of FPGA and peripheral cell; New FPGA is an empty IC, has no function, after writing code, compiling, will compiling destination file burning FPGA; FPGA promptly is an IC with specific function; IC can repeat burning, and the different files of burning just have difference in functionality; Pure led drive circuit is selected special-purpose drive IC for use, like AS3693B, SN3480, MSL2100 etc.

The utility model is on the side-emitting LED backlight, to realize 2D Local Dimming technology; Significantly reduce power consumption, improve the display frame correlative value, reach and reduce ghost; Simultaneously, having realized the ultrathin design that direct LED backlight is difficult to realize, is that fish and bear's paw get both.

Description of drawings:

Accompanying drawing 1 is the frame principle figure of the utility model;

Accompanying drawing 2 is the schematic diagram of local dimming controller.

Embodiment:

Below in conjunction with accompanying drawing the utility model is further specified:

Consult Fig. 1, shown in 2; The module backlight of the liquid crystal display with local dimming function that the utility model provides; Have four circuit boards on this liquid crystal display module backlight: power panel 1, movement mainboard 2, integrated LED drive plate 3, TCON plate 4; And the last LED lamp bar 5 and following LED lamp bar 6 that are installed in screen body upper and lower sides respectively, the LED in each lamp bar is divided into eight groups, every group of drive; Full frame 16 zones that are divided into, each zone can independent light modulations, significantly reduce power consumption, improve the display frame correlative value and reduce ghost.

Shown in Figure 2, said integrated LED drive plate 3 includes local dimming controller 31 and pure led drive circuit 32; Local dimming controller 31 is made up of FPGA and peripheral cell; New FPGA is an empty IC, has no function, after writing code, compiling, will compiling destination file burning FPGA; FPGA promptly is an IC with specific function; IC can repeat burning, and the different files of burning just have difference in functionality; Pure led drive circuit 32 is selected special-purpose drive IC for use, and like AS3693B, SN3480, MSL2100 etc., pure led drive circuit 32 drives the last LED lamp bar 5 and following LED lamp bar 6 of screen body upper and lower sides.After said local dimming controller 31 receives LVD; One the tunnel through flowing to TCON plate 4 after luminance compensation 311 and the RGB commentaries on classics L312 processing; Another road flows to pure led drive circuit 32 after then calculating through brightness histogram and produce and driving numbers 313, and pure led drive circuit 32 drives the last LED lamp bar 5 and the following LED lamp bar 6 of screen body upper and lower sides; Realize lighting liquid crystal face version and local dimming thus.The utility model is on the side-emitting LED backlight, to realize 2D Local Dimming technology; Significantly reduce power consumption, improve the display frame correlative value, reach and reduce ghost; Simultaneously, having realized the ultrathin design that direct LED backlight is difficult to realize, is that fish and bear's paw get both.

Claims

1. the liquid crystal display module backlight that has the local dimming function; It is characterized in that: have four circuit boards on the liquid crystal display module backlight: power panel, movement mainboard, integrated LED drive plate, TCON plate; And the last LED lamp bar and following LED lamp bar that are installed in screen body upper and lower sides respectively; LED in each lamp bar is divided into eight groups, every group of drive.

2. the liquid crystal display module backlight with local dimming function according to claim 1, it is characterized in that: the integrated LED drive plate includes local dimming controller and pure led drive circuit; The local dimming controller is made up of FPGA and peripheral cell.