CN215340639U

CN215340639U - Local dimming liquid crystal module

Info

Publication number: CN215340639U
Application number: CN202121757934.1U
Authority: CN
Inventors: 刘洁; 何基强
Original assignee: Jiangxi Holitech Technology Co Ltd
Current assignee: Jiangxi Holitech Technology Co Ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2021-12-28
Anticipated expiration: 2031-07-30

Abstract

The utility model discloses a local dimming liquid crystal module which comprises an LED lamp panel, wherein a single-layer optical film material, a third polaroid, a second LCD, a second polaroid, a first LCD and a first polaroid are sequentially arranged above the LED lamp panel from bottom to top. According to the utility model, the second LCD is added, the third polarizer is matched, and the single-layer optical film material is combined to replace various multi-layer optical film materials, so that the lamp shadow of the LED lamp panel is eliminated, the thickness is thinner than that of a straight miniLED, and the effect can be comparable to that of an AMOLED; the second LCD can be divided into a plurality of areas, the second LCD and the third polaroid in the liquid crystal module are used for controlling the switch of each area according to the information of the real image, the whole uniform light of the traditional liquid crystal module is changed into the light which is bright and dark and is matched with the displayed image, the more refined control of the image is realized, and the regional dimming effect is better.

Description

Local dimming liquid crystal module

Technical Field

The utility model relates to the field of liquid crystal display, in particular to a local dimming liquid crystal module.

Background

The contrast ratio of the conventional liquid crystal display is not as good as that of the AMOLED screen, and the conventional liquid crystal display can achieve the display effect similar to that of the AMOLED screen by performing local dimming processing on the conventional liquid crystal display.

As shown in fig. 1, the conventional miniLED local dimming module generally employs an LED lamp panel disposed below an LCD, and an LED light source group in the LED lamp panel is disposed above a reflective layer and is a direct-type light emitting structure. This kind of module of adjusting luminance is divided into N regions with the LED lamp plate, adjusts the switch in every region and the regional light modulation of realizing with the power according to picture information, and for the facula problem that covers the LED lamp plate, the LED lamp plate needs certain distance with the membrane material in a poor light, this lamp shadow that just needs to increase multiple multilayer optical membrane material in order to eliminate the LED lamp plate leads to miniLED thickness in a poor light great.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: the local dimming liquid crystal module is thinned by changing the internal structure of the local dimming liquid crystal module.

The technical scheme adopted by the utility model for solving the problems is as follows: the utility model provides a regional liquid crystal module of adjusting luminance, includes the LED lamp plate, up single-layer optical film material, third polaroid, second LCD, second polaroid, first LCD and first polaroid have set gradually from down in LED lamp plate top.

Compared with the prior art, the utility model has the advantages that: by adding the second LCD and matching with the third polarizer and combining with a single-layer optical film material, various multi-layer optical film materials are replaced, the lamp shadow of the LED lamp panel is eliminated, the thickness is thinner than that of a straight miniLED, and the effect can be comparable to that of an AMOLED; the second LCD can be divided into a plurality of areas, the second LCD and the third polaroid in the liquid crystal module are used for controlling the switch of each area according to the information of the real image, the whole uniform light of the traditional liquid crystal module is changed into the light which is bright and dark and is matched with the displayed image, the more refined control of the image is realized, and the regional dimming effect is better.

Preferably, the LED lamp plate includes reflecting layer and LED light source group, LED light source group sets up in the reflecting layer top, LED light source group and optical film material butt. Like this, use current straight following formula LED lamp plate to come the direct aggregate, convenient equipment.

Preferably, the LED lamp plate includes light guide plate and LED light source group, LED light source group butt in the light guide plate side, light guide plate and optical film material butt. Thus, the thickness of the whole liquid crystal module can be further reduced by adopting a side-emitting form, so that the whole liquid crystal module is thinner.

Preferably, the first LCD comprises a second glass, a first thin film transistor, a first liquid crystal, a color filter and a first glass which are sequentially arranged from bottom to top. Thus, the color filter can perform filtering processing on the first liquid crystal, and the display effect is better.

Preferably, the second LCD comprises a fourth glass, a second thin film transistor, a second liquid crystal and a third glass which are sequentially arranged from bottom to top. Therefore, the second LCD is arranged below the first LCD, light from the lower part upwards needs to pass through the first LCD, the added second LCD can only be provided with a thin film transistor without a color filter, and the light is filtered through the color filter of the first LCD, so that the thickness can be further reduced.

Preferably, the number of the thin film transistor switches in the second thin film transistor is less than that of the thin film transistor switches in the first thin film transistor, and the thin film transistor switches in the second thin film transistor are uniformly arranged in the second thin film transistor. Therefore, the second thin film transistor is simpler in design, the brightness of each region of the second LCD can be adjusted conveniently, the backlight uniform area light source is more finely controlled, and regional dimming is realized.

Preferably, the difference between the polarization angles of the first polarizer and the second polarizer is 90 °, and the difference between the polarization angles of the second polarizer and the third polarizer is 90 °. Therefore, an included angle of 90 degrees is formed between two adjacent polaroids, and local dimming is facilitated.

Drawings

FIG. 1 is a diagram of a direct type miniLED local dimming module in the prior art;

FIG. 2 is a schematic diagram of a local dimming LCD module according to the present invention;

FIG. 3 is a schematic view of a direct-type light-emitting structure of a local dimming LCD module according to the present invention;

FIG. 4 is a schematic side view of a local dimming LCD module according to the present invention;

FIG. 5 is a schematic diagram of the internal structure of the first LCD according to the present invention;

fig. 6 is a schematic diagram of the internal structure of a second LCD according to the present invention.

The reference numbers in the figures illustrate: 1. the liquid crystal display panel comprises a first polarizer, 2, a first LCD, 21, first glass, 22, a color filter, 23, first liquid crystal, 24, a first thin film transistor, 25, second glass, 3, a second polarizer, 4, a second LCD, 41, third glass, 42, second liquid crystal, 43, a second thin film transistor, 44, fourth glass, 5, a third polarizer, 6, an optical film, 7, an LED lamp panel, 71, a reflecting layer, 72, an LED light source group, 73 and a light guide plate.

Detailed Description

Embodiments of the present invention are further described below with reference to the accompanying drawings.

As shown in fig. 2-6, this embodiment relates to a local dimming liquid crystal module, including LED lamp plate 7, from bottom to top has set gradually individual layer optical film material 6, second polaroid 3, first LCD2 and first polaroid 1 above LED lamp plate 7.

In this embodiment, a second LCD4 and a third polarizer 5 are disposed between the second polarizer 3 and the optical film 6, the second LCD4 is disposed below the second polarizer 3, and the third polarizer 5 is disposed above the optical film 6.

By controlling the deflection of the second LCD4 and matching the second polarizer 3 and the third polarizer 5, the brightness of each region can be adjusted according to the actual image information, so that the original uniform light can be dimmed, and the contrast of the picture can be enhanced. The first LCD2 and the second LCD4 share the second polarizer 3, the thickness of the second LCD2 and the thickness of the third polarizer 5 are increased compared with the common display module of the local dimming LCD module, but the used optical film material 6 is of a single-layer structure, various multi-layer structures are not needed, the thickness of the optical film material is lower than that of the direct-type miniLED display module, and the effect of the optical film material can be comparable to that of an AMOLED.

Wherein, see that fig. 3 shows, LED lamp plate 7 includes reflection stratum 71 and LED light source group 72, and LED light source group 72 sets up in reflection stratum 71 top, and LED light source group 72 and optical film material 6 butt. The existing direct type LED lamp panel is used for direct combination, and assembly is convenient.

Referring to fig. 4, the LED lamp panel 7 includes a light guide plate 73 and an LED light source group 72, the LED light source group 72 abuts against the side of the light guide plate 73, and the light guide plate 73 abuts against the optical film 6. Thus, the thickness of the whole liquid crystal module can be further reduced by adopting a side-emitting form, so that the whole liquid crystal module is thinner.

In this embodiment, the first LCD2 includes a second glass 25, a first tft 24, a first liquid crystal 23, a color filter 22, and a first glass 21, which are sequentially disposed from bottom to top, the second glass 25 is disposed above the second polarizer 3, and the first glass 21 is disposed below the first polarizer 1.

The second LCD4 includes a fourth glass 44, a second tft 43, a second liquid crystal 42, and a third glass 41 sequentially disposed from bottom to top, the fourth glass 44 is disposed above the third polarizer 5, and the third glass 41 is disposed below the second polarizer 3.

Since the second LCD4 is disposed below the first LCD2, light is irradiated from below to above and needs to pass through the first LCD2, and the additional second LCD4 may only have a thin film transistor without the color filter 22 and may be filtered through the color filter 22 of the first LCD2, thereby further reducing the thickness.

The number of tft switches in the second tft 43 is lower than that in the first tft 24, and the tft switches in the second tft 43 are uniformly arranged in the second tft 43. By reducing the number of the thin film transistor switches in the second thin film transistor 43, the design of the second thin film transistor 43 is simpler, the brightness of each region of the second LCD4 can be conveniently adjusted, the backlight uniform surface light source can be more finely controlled, and the regional dimming can be realized.

In this embodiment, the polarization angles of the first polarizer 1 and the second polarizer 3 are different by 90 °, and the polarization angles of the second polarizer 3 and the third polarizer 5 are different by 90 °. An included angle of 90 degrees is formed between two adjacent polaroids, and local dimming is facilitated.

In this embodiment, the angles of the adjacent polarizers also need to match the LCD. For example, the upper and lower polarizers of some LCDs are matched at 0 ° by 90 °, and some polarizers are matched at 45 ° by 45 °. Of course, in the actual use process, the difference of 90 ° may not be exactly achieved, but only the difference of approximately 90 ° is required, for example, there is a matching of 97 ° × 173 °.

The utility model has the beneficial effects that: by adding the second LCD4 and matching with the third polarizer 5, the single-layer optical film 6 is combined to replace various multi-layer optical films 6, the lamp shadow of the LED lamp panel 7 is eliminated, the thickness is thinner than that of a straight miniLED, and the effect can be comparable to that of an AMOLED; the second LCD4 can be divided into a plurality of areas, and the switch of each area is controlled through the second LCD4 and the third polaroid 5 in the liquid crystal module according to the information of the real image, so that the whole uniform light of the traditional liquid crystal module is changed into the light which is partially bright and partially dark and is matched with the displayed image, the more fine control of the image is realized, and the regional dimming effect is better.

While the foregoing description shows and describes several preferred embodiments of the utility model, it is to be understood, as noted above, that the utility model is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The utility model provides a local dimming liquid crystal module, includes LED lamp plate (7), its characterized in that: the LED lamp panel (7) top is from up having set gradually individual layer optical film material (6), third polaroid (5), second LCD (4), second polaroid (3), first LCD (2) and first polaroid (1) down.

2. The local dimming liquid crystal module as claimed in claim 1, wherein: LED lamp plate (7) are including reflection stratum (71) and LED light source group (72), LED light source group (72) set up in reflection stratum (71) top, LED light source group (72) and optical film material (6) butt.

3. The local dimming liquid crystal module as claimed in claim 1, wherein: LED lamp plate (7) include light guide plate (73) and LED light source group (72), LED light source group (72) butt in light guide plate (73) side, light guide plate (73) and optical film material (6) butt.

4. The local dimming liquid crystal module as claimed in claim 1, wherein: the first LCD (2) comprises second glass (25), a first thin film transistor (24), first liquid crystal (23), a color filter (22) and first glass (21) which are sequentially arranged from bottom to top.

5. The local dimming liquid crystal module as claimed in claim 4, wherein: the second LCD (4) comprises fourth glass (44), a second thin film transistor (43), second liquid crystal (42) and third glass (41) which are sequentially arranged from bottom to top.

6. The local dimming liquid crystal module as claimed in claim 5, wherein: the number of the thin film transistor switches in the second thin film transistor (43) is lower than that of the thin film transistor switches in the first thin film transistor (24), and the thin film transistor switches in the second thin film transistor (43) are uniformly arranged in the second thin film transistor (43).

7. The local dimming liquid crystal module as claimed in claim 1, wherein: the polarizing angles of the first polarizer (1) and the second polarizer (3) are different by 90 degrees, and the polarizing angles of the second polarizer (3) and the third polarizer (5) are different by 90 degrees.