Backlight structure for eliminating peripheral blue light of mini LED backlight

Abstract

The application discloses a backlight structure for eliminating peripheral blue light of a mini LED backlight, a display module and electronic equipment, wherein the backlight structure comprises a lamp plate and a QD film arranged on a light-emitting surface of the lamp plate, the lamp plate is provided with a plurality of mini LED chips, the mini LED chips comprise first chips and second chips, the wavelength of the first chips is greater than that of the second chips, and the mini LED chips closest to edge positions of four edges of the lamp plate are all first chips. The application has the beneficial effect that the problem of peripheral blue light caused by edge failure of the QD film can be avoided, the edge of the backlight can also maintain a normal light-emitting state, and the light-emitting quality of the backlight and the display effect of the subsequent display module and electronic equipment can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display modules, and in particular to a backlight structure for eliminating blue light at the periphery of a mini LED backlight. BACKGROUND

[0002] In a mini LED backlight module, the principle of emitting white light is that blue mini LED chips emit light, which is then projected onto a yellow QD film (quantum dot film). The blue light excites the corresponding materials in the QD film to generate white light. Subsequently, other optical films are used to brighten and mix the light. During the production and manufacturing of the QD film, the edge of the QD film is exposed to air after cutting, which causes the QD materials at the edge to be oxidized and lose effectiveness, resulting in blue light being emitted at the edge of the backlight module.

[0003] Therefore, the prior art has defects and needs to be improved. SUMMARY

[0004] The present application aims to overcome the shortcomings of the prior art and provide a backlight structure for eliminating blue light at the periphery of a mini LED backlight, a display module, and an electronic device.

[0005] The technical solution of the present application is as follows: The present application provides a backlight structure for eliminating blue light at the periphery of a mini LED backlight, comprising a lamp plate and a QD film arranged on the light-emitting surface of the lamp plate. The lamp plate is provided with a plurality of mini LED chips, the mini LED chips include first chips and second chips, the wavelength of the first chips is greater than that of the second chips, and the mini LED chips at the edge positions closest to the four edges of the lamp plate are all first chips.

[0006] Further, the wavelength of the first chips is greater than that of the second chips by no more than 5 nanometers.

[0007] Further, the mini LED chips on the lamp plate are arranged in an array.

[0008] Further, only the mini LED chips at the edge positions closest to the four edges of the lamp plate are first chips.

[0009] Further, the backlight structure further comprises a diffusion film, which is arranged between the QD film and the lamp plate.

[0010] Further, the backlight structure further comprises a blue film, which is arranged between the diffusion film and the QD film.

[0011] With the above scheme, the beneficial effects of the present application are that the problem of peripheral blue light caused by the edge failure of the QD film can be avoided, the edge of the backlight can also maintain normal light-emitting state, and the light-emitting quality of the backlight and the display effect of the subsequent display module and electronic device can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 The structure schematic diagram of an embodiment of the present application.

[0013] Fig. 2 The structure schematic diagram of a lamp plate of an embodiment of the present application. DETAILED DESCRIPTION

[0014] The present application will be described in detail below in combination with the drawings and specific embodiments.

[0015] Please refer to Figs. 1-2 The present application provides a structure for eliminating the peripheral blue light of a mini LED backlight, comprising a lamp plate 1 and a QD film 2 arranged on the light-emitting surface of the lamp plate 1, wherein the lamp plate 1 is provided with a plurality of mini LED chips 3, the mini LED chips 3 include first chips 31 and second chips 32, the wavelength of the first chips 31 is greater than that of the second chips 32, and the mini LED chips 3 closest to the edge positions of the four edges of the lamp plate 1 are all first chips 31.

[0016] Further, the wavelength of the first chips 31 is greater than that of the second chips 32 by no more than 5 nanometers, that is, the problem of peripheral blue light can be avoided, and the color difference between the periphery and the middle caused by too large wavelength difference can also be avoided. For example, when the wavelength of the second chips 32 is 450 nm, the wavelength of the first chips 31 at the edge can be 452.5 nm or 455 nm, etc.

[0017] Further, the mini LED chips 3 on the lamp plate 1 are arrayed.

[0018] Further, only the mini LED chips 3 closest to the edge positions of the four edges of the lamp plate 1 are first chips 31. That is, in the lamp plate 1, only the mini LED chips 3 in the leftmost column, the rightmost column, the frontmost row and the last row of the arrayed mini LED chips 3 are first chips 31, and the remaining mini LED chips 3 are all second chips 32.

[0019] Further, the backlight structure further comprises a diffusion film, which is arranged between the QD film 2 and the lamp plate 1. The backlight structure further comprises a blue film, which is arranged between the diffusion film and the QD film 2. The backlight structure further comprises an upper BEF, a lower BEF and an upper diffusion film, which are sequentially arranged above the QD film 2.

[0020] In the scheme, the blue light emitted by the mini LED chip 3 and the QD film 2 excite to generate red, green and blue light, and the three colors of light are mixed to form white light. Compared with the prior art, in the scheme, the wavelength of the mini LED chip 3 at the edge position is changed, so that the excitation proportion of red, green and blue light is also changed. The longer the wavelength of the chip is, the more red and green light is generated after excitation, and the less blue light is generated. The problem that the QD film 2 has more blue light and less red and green light due to the small peripheral QD density can be well solved, and the effect that the proportion of red, green and blue light generated at the periphery is appropriate can be achieved.

[0021] The application further provides a display module, which comprises the backlight structure.

[0022] The application further provides an electronic device, which comprises the display module.

[0023] In summary, the application has the beneficial effects that the problem of peripheral blue caused by the failure of the QD film edge of the backlight can be avoided, the backlight edge can also maintain a normal light-emitting state, and the light-emitting quality of the backlight and the display effect of the subsequent display module and electronic device can be improved.

[0024] The above is only a preferred embodiment of the application and is not used to limit the application. Any modification, equivalent replacement and improvement made within the spirit and principle of the application should be included in the protection scope of the application.

Claims

1. A backlight structure for eliminating blue light around the periphery of a mini LED backlight, characterized in that, include: The lamp board and a QD film disposed on the light-emitting surface of the lamp board are provided. The lamp board is provided with a plurality of mini LED chips, including a first chip and a second chip. The wavelength of the first chip is greater than that of the second chip. The mini LED chips located at the edges closest to the four sides of the lamp board are all first chips. The wavelength of the first chip is greater than that of the second chip by no more than 5 nanometers. The lamp board is designed with an array of mini LED chips. It also includes a diffusion film disposed between the QD film and the lamp board.

2. The backlight structure for eliminating blue light around the periphery of mini LED backlight according to claim 1, characterized in that, Only the mini LED chips located at the edges of the four sides closest to the light panel are the first chips.

3. The backlight structure for eliminating blue light around the periphery of mini LED backlight according to claim 1, characterized in that, It also includes a blue film, which is disposed between the diffusion film and the QD film.

4. A display module, characterized in that, Includes the backlight structure as described in any one of claims 1 to 3.

5. An electronic device, characterized in that, Includes the display module as described in claim 4.

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