Backlight direct display module and display device

Abstract

The backlight direct display module comprises a cover plate, one side of the back face of the cover plate is directly connected with the backlight module into a whole, and a liquid crystal display module is not arranged between the cover plate and the backlight module. The cover plate structurally comprises a cover plate body, a black shading ink layer and a semi-permeable ink layer which are stacked in sequence; the black shading ink layer covers partial area of the back surface of the cover plate body, and the area, not covered by the black shading ink layer, of the back surface of the cover plate body forms a plurality of hollow areas, so that the cover plate forms a display area and a non-display area; the semi-permeable ink layer covers the black shading ink layer and the plurality of hollow areas; the backlight module comprises a plurality of LED lamps which are independently controlled; a light-emitting side of the backlight module is provided with a light-shielding layer used for being attached to the cover plate, and hollowed-out parts are arranged on the light-shielding layer and correspond to the hollowed-out areas in position. According to the utility model, the performance of the display module is improved and the manufacturing cost is reduced while the simple display requirement is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to display technical field especially, it is a kind of backlight direct display module and display device. BACKGROUND

[0002] Some simple liquid crystal display module will be used in automobile instrument, just need to display some simple icons and speed etc.This kind of liquid crystal display module's structure generally includes cover plate, segment code (liquid crystal screen display mode) screen and backlight source, can be realized display function by controlling the bright and dark of multiple segment electrode.It is widely used in intelligent water meter, electronic alarm clock, blood glucose meter etc.low-power consumption equipment.This kind of liquid crystal display module's structure display function has certain limitation and weak environmental adaptability, mainly reflected in: single color, mostly monochrome (such as black background white word), and multicolor segment code screen needs complex driving circuit, cost increases significantly.Temperature sensitivity, liquid crystal viscosity changes with temperature, response speed or contrast ratio significantly decreases under extreme temperature (-20 DEG C or above 60 DEG C).Poor resistance to vibration, vibration or impact easily leads to electrode fracture or liquid crystal leakage. SUMMARY

[0003] In view of the deficiencies of the prior art, the utility model provides a backlight direct display module and display device, aims at meeting simple display requirement while improving module performance and reducing manufacturing cost.

[0004] The technical scheme adopted by the utility model is as follows:

[0005] The utility model provides a backlight direct display module, including cover plate, the back side of cover plate is directly connected with backlight module and is integrated, and no liquid crystal display module is arranged between the both;

[0006] The structure of the cover plate includes cover plate body, black light-shielding ink layer and semi-transparent ink layer which are stacked in sequence;

[0007] The black light-shielding ink layer covers part area of the back of the cover plate body, the area of the back of the cover plate body not covered by the black light-shielding ink layer forms a plurality of hollow areas, so that the cover plate forms display area and non-display area;

[0008] The semi-transparent ink layer covers the black light-shielding ink layer and the plurality of hollow areas;

[0009] The backlight module includes a plurality of independently controlled LED lamps;

[0010] The light-emitting side of the backlight module is provided with a light-shielding layer for being attached with the cover plate, the light-shielding layer is provided with a hollow part, which corresponds to the position of the plurality of hollow areas, so that the light provided by the backlight module passes through the display area.

[0011] Further technical scheme is:

[0012] The light shielding layer is a light shielding double-sided adhesive, and the backlight module is bonded to the cover plate through the light shielding double-sided adhesive.

[0013] The edge of the hollow part on the light shielding layer exceeds the edge of the corresponding hollow area by 0.2-0.4 mm.

[0014] The backlight module comprises a rubber frame, and the rubber frame is provided with a lamp plate, which is provided with the plurality of independently controlled LED lamps, and the top of the LED lamp is provided with an optical film layer, and the lamp plate is used to be connected with a mainboard of a display device.

[0015] The LED lamp is a top light emitting lamp and is arranged in an array and corresponds to the hollow area.

[0016] The color developing ink layer is arranged at a position corresponding to the hollow area on the semi-transparent ink layer, and the color developing ink layer is yellow, red or green.

[0017] The thickness of the black light shielding ink layer is 5-10 microns, and the thickness of the semi-transparent ink layer is 5-10 microns.

[0018] The thickness of the light shielding layer is 0.06-0.15 mm.

[0019] The shapes of the plurality of hollow areas match the shapes of icons, numbers or letters to be displayed.

[0020] The utility model also provides a display device which comprises the backlight direct display module.

[0021] The utility model has the advantages as follows:

[0022] Compared with a traditional simple display screen, the utility model has the advantages of strong environmental temperature adaptability, good anti-falling performance, low cost and the like.

[0023] The utility model does not need to set a segment code liquid crystal display module, and only through the combination of the improved cover plate and the backlight module, the display function of the traditional simple display screen is realized, and the utility model is simple to manufacture and low in cost.

[0024] The utility model satisfies the differentiated and personalized requirements of different icon brightness and color in the display area, improves the display performance in an extreme environment, and has good anti-falling performance.

[0025] The light shielding double-sided adhesive is connected between the cover plate and the backlight module of the utility model, solves the light shielding problem, and realizes bonding connection.

[0026] Other features and advantages of the utility model will be described in the subsequent description or can be understood through the implementation of the utility model. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0028] Figure 2 This is a schematic diagram of the cover plate in an embodiment of the present utility model.

[0029] Figure 3 This is a schematic diagram of the back structure of the cover plate in an embodiment of this utility model.

[0030] Figure 4 This is a schematic diagram of the backlight module according to an embodiment of the present invention.

[0031] In the diagram: 1. Cover plate; 2. Backlight module; 11. Cover plate body; 12. Black light-shielding ink layer; 13. Semi-transparent ink layer; 21. Light-shielding layer; 22. Optical film layer; 23. LED light; 24. Light board; 25. Frame. Detailed Implementation

[0032] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0033] See Figures 1 to 4 The backlight direct display module of this embodiment includes a cover plate 1. One side of the back of the cover plate 1 is directly connected to the backlight module 2 to form a whole, and no liquid crystal display module is disposed between the two.

[0034] like Figure 2 and Figure 3 As shown, the structure of the cover plate 1 includes a cover plate body 11, a black light-blocking ink layer 12, and a semi-transparent ink layer 13 stacked in sequence.

[0035] The black light-blocking ink layer 12 covers a portion of the back of the cover plate body 11. The area on the back of the cover plate body 11 not covered by the black light-blocking ink layer 12 forms several hollow areas 111, thereby forming a display area and a non-display area on the cover plate 1.

[0036] Among them, the shapes of several cutout areas 111 match the shapes of the icons, numbers, or letters to be displayed.

[0037] Preferably, the cover plate body 11 is a glass substrate.

[0038] Preferably, the thickness of the black opaque ink layer 12 is 5–10 μm.

[0039] The position of the display area corresponds to the position of the cutout area 111, while the position of the non-display area corresponds to the position of the black light-blocking ink layer 12.

[0040] A semi-transparent ink layer 13 covers a black opaque ink layer 12 and the aforementioned perforated areas 111.

[0041] The semi-transparent ink layer 13 is full-surface screen-printed. As the second layer of light-blocking ink, the semi-transparent ink layer 13 also serves as the semi-transparent ink of the hollowed-out portion, so that the display area appears black when the light source of the backlight module is not on.

[0042] Preferably, the thickness of the semi-transparent ink layer 13 is 5-10 μm.

[0043] Preferably, the light transmittance of the semi-transparent ink layer 13 is 30%-70%.

[0044] As a further improvement, the semi-transparent ink layer 13 is further provided with a color-developing ink layer 14 at the position corresponding to the hollowed-out area 111. The color of the color-developing ink layer 14 is preferably one of yellow, red, and green.

[0045] The color-developing ink layer 14 is used to present various color effects. The color-developing ink layer 14 is screen-printed on the semi-transparent ink layer 13 and corresponds to the position of the hollowed-out area 111, so as to meet the differentiation requirements of color, brightness, etc. of different icons, numbers, and letters.

[0046] As shown in FIGS. 1, 2, and 3, the backlight module 2 is provided with a light-blocking layer 21 for bonding with the cover plate 1. The light-blocking layer 21 is provided with a hollowed-out portion corresponding to the positions of the hollowed-out areas 111, so as to allow the light provided by the backlight module 2 to pass through the display area. Figure 3 Figure 4 Preferably, the light-blocking layer 21 is a light-blocking double-sided adhesive, i.e., a black-and-white double-sided adhesive, which is usually black on the front side and white on the back side. The light-blocking double-sided adhesive serves to block light, so that the light source only passes through the display area to be displayed, and to realize the bonding of the backlight module 2 and the cover plate 1.

[0047] Preferably, the edge of the hollowed-out portion of the light-blocking layer 21 extends 0.2-0.4 mm beyond the edge of the hollowed-out area 111 corresponding thereto. That is, the edge of the hollowed-out portion extends 0.2-0.4 mm outward relative to the edge of the hollowed-out area corresponding thereto, so as to meet the assembly dimensional tolerance and avoid incomplete image display of the display area to be displayed after assembly.

[0048] Preferably, the thickness of the light-blocking layer 21 is 0.06-0.15 mm.

[0049] The structure of the backlight module 2 further includes a rubber frame 25 as a supporting shell. The rubber frame 25 is provided with a lamp plate 24, which is provided with a plurality of independently controlled LED lamps 23. The top of the LED lamp 23 is provided with an optical film layer 22. The lamp plate 24 can be FPC or PCB and is connected to the main board of the display device.

[0050] Preferably, the LED lamp 23 is welded on the lamp plate 24, and the single LED lamp 23 is controlled by wire.

[0051] Preferably, the LED lamp 23 is welded on the lamp plate 24, and the single LED lamp 23 is controlled by wire. ​

[0052] As preferred, the LED lamp 23 is arranged in an array, and the arrangement position corresponds to the hollowed-out area 111, and the remaining area does not need to be arranged.

[0053] As preferred, the LED lamp 23 is a top-emitting lamp.

[0054] The optical film layer 22 adopts the optical film device commonly used in the backlight module, including diffusion film and light enhancement film, and mainly plays the role of increasing the brightness of the backlight, dispersing the light source, and making the light emission uniform.

[0055] The lamp plate 24 and the optical film layer 22 can be fixed by using buckles, limiting grooves and other structures, which are conventional technical means and will not be described in detail.

[0056] The embodiment also provides a display device comprising the backlight direct display module. The display device comprises a vehicle-mounted instrument, a smart water meter, a smart household appliance display such as an electronic scale, a thermometer and a multimeter.

[0057] The utility model discloses a segment code liquid crystal display module is not needed, only through the improved cover and the backlight module combination, realized the display function of traditional simple display screen. Meanwhile, through the superposition design of ink layer, satisfy the individuality demand of icon brightness, color, improve the display performance under the extreme environment, and possess good anti -shock, simple production low cost. The traditional simple display screen temperature environment adaptability is poor, and the anti -shock performance is poor, and the cost is high.

[0058] Those skilled in the art can understand that the above description is only preferred embodiments of the utility model, and is not used to limit the utility model, and although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art, still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part technical features. Any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model, should be included in the protection scope of the utility model.

Claims

1. A direct-lit backlight module, comprising: The cover plate (1) is directly connected with the backlight module (2) on the back side and no liquid crystal display module is arranged between them. The structure of the cover plate (1) comprises a cover plate body (11), a black light-shielding ink layer (12) and a semi-transparent ink layer (13) stacked in sequence. The black light-shielding ink layer (12) covers part of the back side of the cover plate body (11), and the area of the back side of the cover plate body (11) not covered by the black light-shielding ink layer (12) forms a plurality of hollow areas (111), so that the cover plate (1) forms a display area and a non-display area. The semi-transparent ink layer (13) covers the black light-shielding ink layer (12) and the plurality of hollow areas (111). The backlight module (2) comprises a plurality of independently controlled LED lamps (23). The light-emitting side of the backlight module (2) is provided with a light-shielding layer (21) for adhering to the cover plate (1), and the light-shielding layer (21) is provided with a hollow part corresponding to the position of the plurality of hollow areas (111), so that the light provided by the backlight module (2) passes through the display area.

2. The direct-lit backlight module of claim 1, wherein, The light-shielding layer (21) is a light-shielding double-sided adhesive, and the backlight module (2) is bonded to the cover plate (1) through the light-shielding double-sided adhesive.

3. The direct-lit backlight module of claim 1, wherein, The edge of the hollow part on the light-shielding layer (21) exceeds the edge of the corresponding hollow area (111) by 0.2-0.4 mm.

4. The direct-lit backlight module of claim 1, wherein, The backlight module (2) comprises a rubber frame (25) provided with a lamp plate (24) inside, and the lamp plate (24) is provided with a plurality of independently controlled LED lamps (23) thereon, and the top of the LED lamp (23) is provided with an optical film layer (22), and the lamp plate (24) is used for connecting with the main board of the display device.

5. The direct-lit backlight module of claim 1, wherein, The LED lamp (23) is a top-emitting lamp and is arranged in an array corresponding to the position of the hollow area (111).

6. The direct-lit backlight module of claim 1, wherein, The semi-transparent ink layer (13) is provided with a color-developing ink layer (14) corresponding to the position of the hollow area (111), and the color-developing ink layer (14) is one of yellow, red and green.

7. The direct-lit backlight module of claim 1, wherein, The thickness of the black light-shielding ink layer (12) is 5-10 μm, and the thickness of the semi-transparent ink layer (13) is 5-10 μm.

8. The direct-lit backlight module of claim 1, wherein, The thickness of the light-shielding layer (21) is 0.06-0.15 mm.

9. The direct-lit backlight module of claim 1, wherein, The shapes of the plurality of hollow areas (111) match the shapes of the icons, numbers or letters to be displayed.

10. A display device, characterized by comprising: The backlight direct display module comprises the backlight direct display module according to any one of claims 1-9.

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