CN202256964U - Liquid crystal display screen and liquid crystal display - Google Patents

Abstract

The utility model discloses a liquid crystal display screen and a liquid crystal display. The liquid crystal display screen comprises a light bar, a light bar substrate, a light guide plate, a reflective sheet, a screen back panel, a power panel and a machine core board. The light bar and the light bar substrate are respectively attached tight to the inner surface of the screen back panel, the light bar is disposed above the light bar substrate, the light guide plate is arranged above the light bar, the reflective sheet is installed between the light guide plate and the screen back panel, and the power panel and the machine core board are placed on the outer surface of the screen back panel at an interval. The liquid crystal display screen further comprises a graphite film disposed between the reflective sheet and the screen back panel, and one end of the graphite film is contacted with the light bar. The screen back panel of the liquid crystal display screen is uniform in heat distribution, thereby being beneficial for heat dissipation, avoiding local hot marks caused by too high local temperature, also avoiding too high local temperature of the light guide plate and the reflective sheet corresponding to the screen back panel in position, ensuring stable optical performance of the light guide plate and the reflective sheet, and preventing light leak from occurring. Accordingly, brightness of all areas of the liquid crystal display is led to be more uniform, and picture quality of the liquid crystal display is effectively improved.

Description

LCDs and LCD

Technical field

The utility model relates to field of liquid crystal, particularly a kind of LCDs and LCD.

Background technology

Along with TV set LCD towards high definition, high brightness development, the luminance brightness of display screen is required also increasingly high, and then cause the power of lamp bar relatively large, heat is higher relatively.Generally, the heat of lamp bar mainly is through heat being conducted the screen backboard to LCD, and by the screen backboard heat is distributed.Therefore, the local temperature near the position of lamp bar can be high than other regional temperatures on the screen backboard.And the reflector plate and the LGP that are installed on the screen backboard are also higher relatively in this regional local temperature, cause the optical property of reflector plate and LGP to reduce, and cause each area light brightness irregularities on the display screen; Even the generation light leakage phenomena, cause image quality to reduce.

The utility model content

The fundamental purpose of the utility model is that a kind of uniform heat distribution and LCDs that helps dispelling the heat and LCD are provided.

The utility model proposes a kind of LCDs; Comprise lamp bar, lamp bar substrate, LGP, reflector plate, screen backboard, power panel and machine core board, said lamp bar and lamp bar substrate are close to said screen backboard inside surface respectively, and this lamp bar is arranged on said lamp bar substrate top; Said LGP is arranged on said lamp bar top; Between said LGP and the screen backboard said reflector plate is installed, said power panel and machine core board are arranged on said screen backboard outside surface at interval, also comprise:

The graphite film is arranged between said reflector plate and the screen backboard, and the one of which end contacts with said lamp bar.

Preferably, said LCDs also comprises:

Radiation coating is coated in said screen backboard outside surface, corresponding to said graphite film, lamp bar and lamp bar substrate.

Preferably, said lamp bar substrate is an extrudate, is provided with the dentation heat radiator.

Preferably, said screen backboard outside surface is fixed with the ladder double-screw bolt; Said LCDs also comprises:

The first samming sheet is installed on the said ladder double-screw bolt, and forms an air blanketing between the said screen backboard outside surface, and its thermal conductive surface is over against said power panel.

Preferably, said LCDs also comprises:

The second samming sheet is close to said screen backboard outside surface, and its thermal conductive surface is over against said machine core board.

The utility model also proposes a kind of LCD; Comprise LCDs; Said LCDs comprises lamp bar, lamp bar substrate, LGP, reflector plate, screen backboard, power panel and machine core board, and said lamp bar and lamp bar substrate are close to said screen backboard inside surface respectively, and this lamp bar is arranged on said lamp bar substrate top; Said LGP is arranged on said lamp bar top; Between said LGP and the screen backboard said reflector plate is installed, said power panel and machine core board are arranged on said screen backboard outside surface at interval, and said LCDs also comprises:

The graphite film is arranged between said reflector plate and the screen backboard, and the one of which end contacts with said lamp bar.

Preferably, said LCDs also comprises:

Radiation coating is coated in said screen backboard outside surface, corresponding to said graphite film, lamp bar and lamp bar substrate.

Preferably, said lamp bar substrate is an extrudate, is provided with the dentation heat radiator.

Preferably, said screen backboard outside surface is fixed with the ladder double-screw bolt; Said LCDs also comprises:

The first samming sheet is installed on the said ladder double-screw bolt, and forms an air blanketing between the said screen backboard outside surface, and its thermal conductive surface is over against said power panel.

Preferably, said LCDs also comprises:

The second samming sheet is close to said screen backboard outside surface, and its thermal conductive surface is over against said machine core board.

The utility model makes heat spread along screen backboard plane, and the uniform heat distribution on the screen backboard helps shielding the backboard heat radiation, avoids because of the too high local hot spot phenomenon that causes of screen backboard local temperature; Also avoided simultaneously causing the local temperature of LGP and reflector plate of its correspondence position too high because of screen backboard localized hyperthermia; The optical property of guaranteeing LGP and reflector plate is stable; Prevent that light leakage phenomena from producing; And then make each area light brightness of LCD more even, effectively improve the image quality of LCD.

Description of drawings

Fig. 1 is the structural representation of LCDs among the utility model embodiment;

Fig. 2 is the partial enlarged drawing at A place in the LCDs shown in Figure 1;

Fig. 3 is the partial enlarged drawing at B place in the LCDs shown in Figure 1.

The realization of the utility model purpose, functional characteristics and advantage will combine embodiment, further specify with reference to accompanying drawing.

Embodiment

Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

Referring to figs. 1 through Fig. 3, the LCDs that Fig. 1 proposes for the utility model embodiment, Fig. 2 is the partial enlarged drawing at A place in the LCDs shown in Figure 1, Fig. 3 is the partial enlarged drawing at B place in the LCDs shown in Figure 1.

As depicted in figs. 1 and 2; The LCDs that the utility model embodiment proposes; Comprise lamp bar 10, lamp bar substrate 20, LGP 30, reflector plate 40 and screen backboard 50, wherein, lamp bar 10, lamp bar substrate 20, LGP 30 and reflector plate 40 are installed in the inside surface of screen backboard 50; Lamp bar 10 is close to screen backboard 50 inside surfaces respectively with lamp bar substrate 20; Lamp bar 10 is arranged on lamp bar substrate 20 tops, and LGP 30 is arranged on lamp bar 10 tops, between LGP 30 and the screen backboard 50 reflector plate 40 is installed.LCDs also comprises:

Graphite film 61 is arranged between reflector plate 40 and the screen backboard 50, and the one of which end contacts with lamp bar 10.

In the utility model; Lamp bar 10 is delivered to heat one end of screen backboard 50 through lamp bar substrate 20; And heat is spread along screen backboard plane; Make the uniform heat distribution on the screen backboard 50, help shielding backboard 50 heat radiations, avoid because of the too high local hot spot phenomenon that causes of screen backboard 50 local temperatures.Also avoided simultaneously causing the local temperature of LGP 30 and reflector plate 40 of its correspondence position too high because of screen backboard 50 localized hyperthermias; The optical property of guaranteeing LGP 30 and reflector plate 40 is stable; Avoid light leakage phenomena to produce, and then effectively improve the backlight illumination of LCDs.

In the present embodiment, LCDs also can comprise:

Radiation coating 62 is coated in screen backboard 50 outside surfaces, corresponding to graphite film 61, lamp bar 10 and lamp bar substrate 20.

The utility model distributes through the heat radiation that the radiation coating 62 that shields backboard 50 outside surfaces will shield on the backboard 50, reduces the temperature of screen backboard 50 fast and effectively, avoids because of the too high local hot spot phenomenon that causes of screen backboard 50 local temperatures.Also avoided simultaneously guaranteeing that the optical property of LGP 30 and reflector plate 40 is stable, and then effectively improving the backlight illumination of LCDs because of screen backboard 50 localized hyperthermias cause the local temperature of LGP 30 and reflector plate 40 of its correspondence position too high.

In the present embodiment, lamp bar substrate 50 can be extrudate, is provided with a plurality of dentation heat radiator.

Present embodiment is made into dentation with lamp bar substrate 50; Utilize a plurality of concaveconvex structures to increase the surface radiating area of lamp bar substrate 50; Take away the heat on lamp bar substrate 50 surface through circulation of air, avoid too much heat to conduct to screen backboard 50 and cause screen backboard 50 local temperatures too high.In addition; Between lamp bar substrate 20 and screen backboard 50, be pasted with bond plies, make the heat on the lamp bar substrate 20 be transmitted to screen backboard 50 rapidly, spread through graphite film 61; And distribute through 62 radiation of radiation coating, help lamp bar substrate 20 and in time dispel the heat.

As shown in figures 1 and 3, the present embodiment LCDs also comprises power panel 71 and machine core board 72, is arranged on screen backboard 50 outside surfaces respectively at interval, and screen backboard 50 outside surfaces also are fixed with ladder double-screw bolt 51.

LCDs also comprises:

The first samming sheet 63 is installed on the ladder double-screw bolt 51, and forms an air blanketing between screen backboard 50 outside surfaces, and its thermal conductive surface is over against power panel 71.

In the present embodiment; The quantity of ladder double-screw bolt 51 is more than three; Be generally four, lay respectively on four angles of the first samming sheet 63, utilize the height of ladder double-screw bolt 51; The first samming sheet 63 and screen backboard 50 outside surfaces are separated, make between the first samming sheet 63 and screen backboard 50 outside surfaces and form air blanketing.Present embodiment spreads the heat that heater members on the power panel 71 produces rapidly along the first samming sheet, 63 in-planes through the first samming sheet 63; And heat and screen backboard 50 are isolated through the air blanketing that forms between the first samming sheet 63 and screen backboard 50 outside surfaces; Avoided conducting to screen screen backboard 50 localized hyperthermias that cause of backboard 50 and the generation of local hot spot because of the heat on the power panel 71; Reduce light leakage phenomena, improve the optical homogeneity and the backlight illumination of LCDs.When circulation of air, can take away the heat on the first samming sheet 63, help power panel 71 heat radiations.

Further, the present embodiment LCDs also can comprise:

The second samming sheet 64 is close to screen backboard 50 outside surfaces, and its thermal conductive surface is over against machine core board 72.

Present embodiment spreads the heat that heater members on the machine core board 72 produces rapidly along the second samming sheet, 64 in-planes through the second samming sheet 64; Because of the heat that heater members produced on the machine core board 72 few; Therefore can directly heat transferred be shielded backboard 50 through the second samming sheet 64; The heat that transmit this moment has been evenly distributed on the second samming sheet 64, also can not produce localized hyperthermia when therefore arriving screen backboard 50, has effectively avoided the generation of local hot spot; Reduce light leakage phenomena, improve the optical homogeneity and the backlight illumination of LCDs.

The utility model also proposes a kind of LCD; Comprise the foregoing liquid crystal display screen, for example, this LCDs comprises lamp bar 10, lamp bar substrate 20, LGP 30, reflector plate 40 and screen backboard 50; Wherein, Lamp bar 10, lamp bar substrate 20, LGP 30 and reflector plate 40 are installed in the inside surface of screen backboard 50, and lamp bar 10 is close to screen backboard 50 inside surfaces respectively with lamp bar substrate 20, and lamp bar 10 is arranged on lamp bar substrate 20 tops; LGP 30 is arranged on lamp bar 10 tops, between LGP 30 and the screen backboard 50 reflector plate 40 is installed.LCDs also comprises:

Graphite film 61 is arranged between reflector plate 40 and the screen backboard 50, and the one of which end contacts with lamp bar 10.

LCDs in the utility model LCD can comprise earlier figures 1 all technical schemes in embodiment illustrated in fig. 3, and its detailed structure and radiating principle can not given unnecessary details at this with reference to previous embodiment.Since adopt the scheme of foregoing liquid crystal display screen, the existing relatively LCD of the utility model LCD, each area light brightness is more even, and image quality is better, and picture is more clear.

The above is merely the preferred embodiment of the utility model; Be not thus the restriction the utility model claim; Every equivalent structure or equivalent flow process conversion that utilizes the utility model instructions and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the utility model.

Claims (10)

1. a LCDs comprises lamp bar, lamp bar substrate, LGP, reflector plate, screen backboard, power panel and machine core board, and said lamp bar and lamp bar substrate are close to said screen backboard inside surface respectively; This lamp bar is arranged on said lamp bar substrate top; Said LGP is arranged on said lamp bar top, between said LGP and the screen backboard said reflector plate is installed, and said power panel and machine core board are arranged on said screen backboard outside surface at interval; It is characterized in that, also comprise:

The graphite film is arranged between said reflector plate and the screen backboard, and the one of which end contacts with said lamp bar.

2. LCDs according to claim 1 is characterized in that, also comprises:

Radiation coating is coated in said screen backboard outside surface, corresponding to said graphite film, lamp bar and lamp bar substrate.

3. LCDs according to claim 2 is characterized in that, said lamp bar substrate is an extrudate, is provided with the dentation heat radiator.

4. according to each described LCDs in the claim 1 to 3, it is characterized in that said screen backboard outside surface is fixed with the ladder double-screw bolt; Said LCDs also comprises:

The first samming sheet is installed on the said ladder double-screw bolt, and forms an air blanketing between the said screen backboard outside surface, and its thermal conductive surface is over against said power panel.

5. LCDs according to claim 4 is characterized in that, also comprises:

The second samming sheet is close to said screen backboard outside surface, and its thermal conductive surface is over against said machine core board.

6. LCD; Comprise LCDs, said LCDs comprises lamp bar, lamp bar substrate, LGP, reflector plate, screen backboard, power panel and machine core board, and said lamp bar and lamp bar substrate are close to said screen backboard inside surface respectively; This lamp bar is arranged on said lamp bar substrate top; Said LGP is arranged on said lamp bar top, between said LGP and the screen backboard said reflector plate is installed, and said power panel and machine core board are arranged on said screen backboard outside surface at interval; It is characterized in that said LCDs also comprises:

The graphite film is arranged between said reflector plate and the screen backboard, and the one of which end contacts with said lamp bar.

7. LCD according to claim 6 is characterized in that, said LCDs also comprises:

Radiation coating is coated in said screen backboard outside surface, corresponding to said graphite film, lamp bar and lamp bar substrate.

8. LCD according to claim 7 is characterized in that, said lamp bar substrate is an extrudate, is provided with the dentation heat radiator.

9. according to each described LCD in the claim 6 to 8, it is characterized in that said screen backboard outside surface is fixed with the ladder double-screw bolt; Said LCDs also comprises:

The first samming sheet is installed on the said ladder double-screw bolt, and forms an air blanketing between the said screen backboard outside surface, and its thermal conductive surface is over against said power panel.

10. LCD according to claim 9 is characterized in that, said LCDs also comprises:

The second samming sheet is close to said screen backboard outside surface, and its thermal conductive surface is over against said machine core board.

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