CN210182038U - Electrodeless regulation front-lighting type electronic ink display screen with PWM function - Google Patents
Electrodeless regulation front-lighting type electronic ink display screen with PWM function Download PDFInfo
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- CN210182038U CN210182038U CN201921226403.2U CN201921226403U CN210182038U CN 210182038 U CN210182038 U CN 210182038U CN 201921226403 U CN201921226403 U CN 201921226403U CN 210182038 U CN210182038 U CN 210182038U
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Abstract
An electrodeless regulation front-lighting type electronic ink display screen with a PWM function comprises a front-lighting, an electronic ink display screen and a PCB circuit board which are arranged from top to bottom; the front light comprises a light guide film and a lamp group. The lamp group of the front lighting is arranged on the side edge part of the light guide film and comprises a plurality of SMT lamp wicks, and a plurality of SMT lamp wick patches are installed on the first FPC. The PCB circuit board comprises a master control MCU and a PWM control chip, the master control MCU is in serial communication connection with the PWM control chip, the PWM control chip is further connected with a first FPC through a port, and a plurality of SMT lamp wicks are connected through the first FPC. The front light of the side part is adjusted in a PWM (pulse width modulation) adjusting mode in a stepless mode, so that the stepless dimming effect of the front light of the electronic ink display screen can be achieved.
Description
Technical Field
The utility model relates to a liquid crystal display technology field, in particular to take electrodeless regulation of PWM function to shine formula electron ink display screen before.
Background
Electronic ink displays have many advantages, including readability, flexibility, and low power consumption. The reflectance and contrast of electronic ink is better than other display technologies. They appear like ink on paper, a medium that people feel comfortable reading and handling. Other display materials feel somewhat faint and difficult to read in bright light, including direct sunlight. Whereas electronic ink based displays are particularly good. Furthermore, electronic ink, unlike other display processes, can hold an image for weeks without consuming any additional power. With other display technologies, no additional power input is required once the image can stay together. An electronic ink display screen in the prior art has a backlight mode and a front lighting mode, and a patent with publication number CN 208507138U discloses an electronic paper display structure with a front lighting and a touch screen.
In the existing design, an adjustable design mode is often adopted in the design of a backlight source, and the design of stepless brightness adjustment is lacked in the adjustment design of the front light of the electronic ink display screen.
Disclosure of Invention
In order to overcome not enough among the background art, the utility model provides a take electrodeless regulation front-lighting formula electronic ink display screen of PWM function adopts PWM regulation mode to carry out electrodeless regulation to the luminous front-lighting of lateral part, can reach the electrodeless dimming effect of front-lighting of electronic ink display screen.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an electrodeless regulation front-lighting type electronic ink display screen with a PWM function comprises a front-lighting, an electronic ink display screen and a PCB circuit board which are arranged from top to bottom; the front light comprises a light guide film and a lamp group.
The lamp group of the front lighting is arranged on the side edge part of the light guide film and comprises a plurality of SMT lamp wicks and a first FPC, and a plurality of SMT lamp wick patches are installed on the first FPC.
The PCB circuit board comprises a master control MCU and a PWM control chip, the master control MCU is in serial communication connection with the PWM control chip, the PWM control chip is further connected with a first FPC through a port, and a plurality of SMT lamp wicks are connected through the first FPC.
The lower end of the electronic ink display screen is bound with a COG IC which is a driving IC of the electronic ink display screen and is connected with a main control MCU on a PCB circuit board through a second FPC.
The PCB circuit board on still install the photo resistance, PWM control chip still be connected with AD sampling chip, PWM control chip passes through AD sampling chip and connects the photo resistance.
Compared with the prior art, the beneficial effects of the utility model are that:
1) the utility model firstly carries out stepless regulation on the front light of the side part luminescence in a PWM regulation mode, and can achieve the stepless dimming effect of the front light of the electronic ink display screen;
2) the utility model adopts the independent PWM control chip except the main control MCU, and is connected with the main control MCU in series, thus being capable of ensuring the reliability of PWM output compared with the conventional mode of directly outputting PWM by the main control MCU;
3) the utility model discloses a photosensitive resistance realizes the detection to ambient light, with the luminance according to the preceding light of the luminance automatically regulated display screen of ambient light.
Drawings
FIG. 1 is a layered structure view of the present invention;
FIG. 2 is a front view of the present invention;
fig. 3 is a circuit block diagram of the PCB circuit board of the present invention;
FIG. 4 is a diagram of an electrical design embodiment of a PWM control chip of the PCB circuit board of the present invention;
fig. 5 is an electrical design example diagram of the main control MCU of the PCB circuit board of the present invention.
In the figure: 1-front lighting 2-electronic ink display screen 3-PCB circuit board 4-first FPC 5-COG IC 6-second FPC 7-master control MCU 8-PWM control chip 9-photoresistor 10-FPC connection port 11-light guide film 12-SMT lamp wick.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
As shown in fig. 1, an electrodeless adjustable front-illuminated electronic ink display screen with a PWM function comprises a front light (1), an electronic ink display screen (2) and a PCB (printed circuit board) arranged from top to bottom.
As shown in fig. 2, the front light (1) includes a light guide film (11) and a lamp set. The lamp group of the front lighting is arranged on the side edge part of the light guide film and comprises a plurality of SMT lamp wicks (12) and a first FPC (4), and the plurality of SMT lamp wicks (12) are mounted on the first FPC (4) in a paster mode.
As shown in fig. 1, 3, 4 and 5, the PCB circuit board (3) comprises a main control MCU (7) and a PWM control chip (8), the main control MCU (7) and the PWM control chip (8) are in serial communication connection, the PWM control chip (8) is further connected with a first FPC (4) through a port, and is connected with a plurality of SMT wicks (12) through the first FPC (4).
The lower end of the electronic ink display screen (2) is bound with a COG IC (5), the COG IC (5) is a driving IC of the electronic ink display screen and is connected with a main control MCU (7) on the PCB circuit board (3) through a second FPC (6).
PCB circuit board (3) on still install photo resistance (9), PWM control chip (3) still be connected with AD sampling chip, PWM control chip (3) are through AD sampling chip connection photo resistance (9). The ambient light is detected through the photoresistor (9), so that the brightness of the SMT lamp wick (12) of the front lighting (1) is automatically adjusted.
In the electrical layout of the PWM controller chip (8) of fig. 4, the PWM controller chip (8) is selected as STC89C32, which connects pin No. 5 (RXD) and pin No. 7 (TXD) of the master MCU (STM32F) of fig. 5 in a serial communication manner through pin No. 10 (RXD P3.1) and pin No. 11 (TXD P3.2).
Except for the serial RXD and TXD connection with the PWM control chip (8), the other programmable output ports of the main control MCU (7) in the figure 5 are all connection ports connected with the electronic ink display screen (2), and are connected with a COG IC (5) bound at the lower end of the electronic ink display screen (2) through a second FPC (6) to drive the ink display screen (2).
The above embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation and specific operation processes are given, but the protection scope of the present invention is not limited to the above embodiments. The methods used in the above examples are conventional methods unless otherwise specified.
Claims (3)
1. An electrodeless regulation front-lighting type electronic ink display screen with a PWM function comprises a front-lighting, an electronic ink display screen and a PCB circuit board which are arranged from top to bottom; the front light comprises a light guide film and a lamp group;
the front lighting lamp group is arranged on the side edge part of the light guide film and comprises a plurality of SMT lamp wicks and a first FPC (flexible printed circuit), and a plurality of SMT lamp wick patches are arranged on the first FPC;
the PCB circuit board comprises a master control MCU and a PWM control chip, the master control MCU is in serial communication connection with the PWM control chip, the PWM control chip is further connected with a first FPC through a port, and a plurality of SMT lamp wicks are connected through the first FPC.
2. The electrodeless adjusted front lighting type electronic ink display screen with the PWM function as claimed in claim 1, wherein a COGIC is bound at the lower end of the electronic ink display screen, is a driving IC of the electronic ink display screen, and is connected with a main control MCU on a PCB circuit board through a second FPC.
3. The electrodeless adjustable front-illuminated electronic ink display screen with the PWM function as claimed in claim 1, wherein a photoresistor is further mounted on the PCB, the PWM control chip is further connected with an AD sampling chip, and the PWM control chip is connected with the photoresistor through the AD sampling chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921226403.2U CN210182038U (en) | 2019-07-31 | 2019-07-31 | Electrodeless regulation front-lighting type electronic ink display screen with PWM function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921226403.2U CN210182038U (en) | 2019-07-31 | 2019-07-31 | Electrodeless regulation front-lighting type electronic ink display screen with PWM function |
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| Publication Number | Publication Date |
|---|---|
| CN210182038U true CN210182038U (en) | 2020-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921226403.2U Active CN210182038U (en) | 2019-07-31 | 2019-07-31 | Electrodeless regulation front-lighting type electronic ink display screen with PWM function |
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| CN (1) | CN210182038U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230333306A1 (en) * | 2022-04-19 | 2023-10-19 | Sindarin, Inc. | Front lighting of a display for a wearable e-reader |
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2019
- 2019-07-31 CN CN201921226403.2U patent/CN210182038U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230333306A1 (en) * | 2022-04-19 | 2023-10-19 | Sindarin, Inc. | Front lighting of a display for a wearable e-reader |
| US12135426B2 (en) * | 2022-04-19 | 2024-11-05 | Sindarin, Inc. | Wearable e-reader |
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Address after: No.288, Yueling Road, Lishan District, Anshan City, Liaoning Province, 114000 Patentee after: Yashi Optoelectronics (Group) Co.,Ltd. Address before: No.288, Yueling Road, Lishan District, Anshan City, Liaoning Province, 114000 Patentee before: ANSHAN YES OPTOELECTRONICS DISPLAY Co.,Ltd. |