CN201765803U - Backlight intensity adjustment structure of electronic device - Google Patents

Abstract

The utility model provides an electron device's strong and weak adjustment structure of light source in a poor light installs in inside and backlight unit electric connection of casing, has printing opacity portion on this casing. The adjusting structure is provided with a light detection circuit board. The light detection circuit board is arranged in the shell, corresponds to the light transmission part, is electrically connected with the backlight module of the electronic device, and is provided with a light detection circuit which is provided with a control unit, a light emitting unit, a driving assembly and a storage unit, wherein the light emitting unit is provided with a light emitting chip and a light detection assembly. The control unit outputs a signal to drive the light-emitting chip through the driving component so as to enable the light-emitting chip to flicker, the light detection component reads an external environment light source when the light-emitting chip is in an off state, the detection signal is transmitted to the control unit to be processed and is compared with a set parameter value stored in the storage unit, and then the brightness of the backlight module is adjusted according to the set parameter value.

Description

Backlight intensity adjustment structure for electronic devices

technical field

The utility model relates to a display screen, in particular to a display screen which can adjust the brightness of a backlight module according to the strength of the light source in the external environment. the

Background technique

Liquid crystal displays have been widely used in various electronic devices, such as liquid crystal displays, mobile phones, personal digital assistants (PDAs), global positioning systems (GPS), ipods, ipads, iphones and digital cameras. the

The current liquid crystal display has two types: reflective and transmissive. Since the power consumption of the reflective LCD is much greater than that of the transmissive, many electronic devices such as PDA, GPS, ipod, ipad, iphone, mobile phones, liquid crystal displays And digital cameras use transmissive LCD screens to best meet the needs of power saving and economic benefits. the

Generally, when using a transmissive LCD display, the image of the transmissive LCD display will be washed out due to strong outdoor light, resulting in a decrease in contrast, resulting in the user being unable to see the LCD display clearly. The images displayed on the LCD screen must be taken in a weak light environment to clearly see the screen displayed on the LCD screen, thus causing trouble and inconvenience in use. the

Moreover, when the transmissive liquid crystal display is used in an environment with weak light, when the brightness reflected by the backlight module of the transmissive liquid crystal display is too bright, it will make the eyes feel uncomfortable. Time use is easy to hurt the eyes. the

In order to solve the above-mentioned problems, people in the industry must open a perforation on the housing of the electronic device, install a light sensor on the through hole, and adjust the brightness of the backlight of the electronic device by using the light sensor to detect the external ambient light source. the

Utility model content

The main purpose of the present invention is to provide a structure for adjusting the intensity of the backlight light source of an electronic device, which can adjust the brightness of the backlight of the electronic device without additionally opening holes in the casing of the electronic device for installing a light detection component. the

In order to achieve the above purpose, the utility model provides a structure for adjusting the intensity of the backlight light source of an electronic device, which is installed inside the housing and electrically connected to the backlight module. The housing has a light-transmitting part. The adjustment structure has:

The light detection circuit board is installed inside the housing, is configured corresponding to the light-transmitting part, and is electrically connected to the backlight module. The light detection circuit board has a light detection circuit; wherein,

The light detection circuit, including:

The control unit is the control core of the light detection circuit;

The drive component is electrically connected to the control unit to receive the drive signal output by the control unit;

The light-emitting unit has a light-emitting chip and a light-detecting component, the light-emitting chip and the light-detecting component are packaged by a package body, and the light-emitting chip is electrically connected to the driving component;

The storage unit is electrically connected to the control unit to store the set parameter value for adjusting the brightness;

Wherein, the control unit controls the light-emitting chip to be in a blinking state. When the light-emitting chip is in a extinguished state, the light detection component reads the external ambient light source entering from the light-transmitting part, transmits the read signal to the control unit for processing, and then communicates with the storage unit. The set parameter value of the unit is compared, and the control unit adjusts the brightness of the light source of the backlight module according to the set parameter value. the

In order to achieve the above purpose, the utility model also provides a structure for adjusting the intensity of the backlight light source of an electronic device, which is installed inside the housing and electrically connected to the backlight module. The housing has a light-transmitting part, and the adjustment structure has:

The light detection circuit board is installed inside the housing, is configured corresponding to the light-transmitting part, and is electrically connected to the backlight module. The light detection circuit board has a light detection circuit; wherein,

The light detection circuit, including:

The control unit is the control core of the light detection circuit;

The light-emitting unit is installed in the light-transmitting part and has a light-emitting chip and a light-detection driving component. The light-emitting chip is electrically connected to the light-detection drive component, and the light-detection drive component is electrically connected to the control unit;

The storage unit is electrically connected to the control unit and stores the set parameter value for adjusting the brightness;

Wherein, the control unit controls the light-emitting chip to blink through the light-detection driving component. When the light-emitting chip is turned off, the light-detection drive component reads the external ambient light source, transmits the read signal to the control unit for processing, and then communicates with the storage unit. Compared with the set parameter value, the control unit adjusts the brightness of the light source of the backlight module according to the set parameter value. the

Compared with the prior art, the utility model combines the light-emitting chip of the light-emitting diode that was originally used as an indicator light and the light detection component for detecting light into a single component, which can be directly installed on the electronic device shell during use. The body is originally installed on the perforation of the indicator light, so that the light detection component can detect the external ambient light source. In this way, the utility model does not need to provide additional perforations on the housing of the electronic device to separately install the light detection component for detecting the external environment light source, so that the display screen of the electronic device is more convenient to adjust according to the strength of the external environment light source The brightness of the backlight module is improved, and it is more economical and convenient to implement. the

Description of drawings

Fig. 1 is the circuit block schematic diagram of light detection circuit of the present utility model;

Fig. 2 is the schematic diagram of using state one of light detecting circuit of the present utility model;

Fig. 3 is the schematic diagram of the second use state of the light detection circuit of the present utility model;

Fig. 4 is the schematic diagram of the usage state three of the optical detection circuit of the present utility model;

Fig. 5 is the schematic diagram of the usage state four of the photodetection circuit of the present utility model;

FIG. 6 is a schematic diagram of another embodiment of the intensity adjustment structure of the backlight light source of the electronic device of the present invention. the

Explanation of reference signs

Light detection circuit 10 Light emitting unit 1

Light-emitting chip 11 Light detection component 12

Encapsulation 13 Driving component 3

Control unit 2 Storage unit 4

Load 5 Light detection drive assembly 6

Light detection circuit board 10a Electronic device 20

Housing 201, 201a, 201b, 201c

Light-transmitting parts 202, 202a, 202c

Translucent button 202b Fluorescent screen 203

Backlight module 204

Detailed ways

Relevant detailed description and technical content of the present utility model, now cooperate with accompanying drawing to illustrate as follows:

Please refer to FIG. 1 , which is a circuit block diagram of the photodetection circuit of the present invention. The intensity adjustment structure of the backlight light source of the electronic device of the utility model is installed inside the casing and electrically connected with the backlight module. As shown in FIG. 1 , the photodetection circuit 10 in the intensity adjustment structure of the backlight light source of the electronic device of the present invention includes: a light emitting unit 1 , a control unit 2 , a driving unit 3 and a storage unit 4 . the

The light emitting unit 1 is composed of a light emitting chip 11 and a light detection component 12 electrically connected, and is packaged by a transparent package body 13 . The light-emitting chip 11 is a light-emitting diode chip. Since the output signal of the control unit 2 drives the light-emitting chip 11 through the drive assembly 3, the light-emitting chip 11 is flickering (on and off). 11 is driven to extinguish the light source to read the external environment. the

The control unit 2 is the control core of the light detection circuit 10, the control unit 2 is electrically connected to the light emitting unit 1, and is used to calculate the signal output by the light detection component 12 and the parameters stored in the storage unit 4 After the values are compared, a control signal is output to control the load 5 . In FIG. 1, the control unit 2 is either a microprocessor (MCU) or a central processing unit (CPU). the

The driving component 3 is electrically connected with the control unit 2 to receive an output signal (such as a driving signal) of the control unit 2 to drive the light-emitting chip 11 to blink. the

The storage unit 4 is electrically connected with the control unit 2 and used for storing setting parameter values for adjusting the brightness of the backlight of the electronic device. In FIG. 1, the storage unit 4 is a memory. the

Please refer to FIG. 1 and FIG. 2 , which are schematic diagrams of the circuit block and the use state 1 of the light detection circuit of the present invention, respectively. As shown in Figures 1 and 2: when the light-emitting unit 1 of the present utility model is used as an indicator light, the light detection circuit 10 is a single light detection circuit board 10a or is directly arranged on the main circuit board of the electronic device 20, The photodetection circuit board 10a is installed at a predetermined position inside the housing 201 of the electronic device 20. When the housing 201 is not transparent, the housing 201 has a light-transmitting portion 202. The light-transmitting portion 202 is a light conductor, and the light detection circuit board 10 a is electrically connected to the backlight module 204 of the fluorescent screen 203 of the electronic device 20 . the

During the use of the electronic device (such as a liquid crystal display) 20, the output signal of the control unit 2 drives the light-emitting chip 11 of the light-emitting unit 1 through the drive component 3, so that when the light-emitting chip 11 is flickering, the light detection component 12 When the light-emitting chip 11 is in the extinguished state, it reads the external ambient light source introduced by the light-transmitting part 202, and transmits the read signal to the control unit 2 for processing. The set parameter value stored inside the unit 4 is compared, and the brightness of the backlight module 204 is adjusted according to the set parameter value, so that the user can clearly see the backlight module 204 when the brightness of the light source in the external environment is too bright or too dark. The picture displayed on the fluorescent screen 203 of the device 20 . the

Please refer to FIG. 1 and FIG. 3 , which are schematic diagrams of the circuit block and the second use state of the photodetection circuit of the present invention, respectively. As shown in Figures 1 and 3: this usage state is roughly the same as that in Figure 2, the difference is that when the housing 201a of the electronic device 20 is transparent, the position of the housing 201a corresponding to the light-emitting unit 1 can be regarded as A light-transmitting part 202a, the output signal of the control unit 2 drives the light-emitting chip 11 through the driving component 3, so that when the light-emitting chip 11 is turned off, the light-detecting component 12 directly reads the light passing through the light-transmitting part 202a. The external ambient light source transmits the read signal to the control unit 2 of the light detection circuit board 10 a for processing, and the control unit 2 adjusts the brightness of the backlight module 204 . the

Please refer to FIG. 1 and FIG. 4 , which are schematic diagrams of the circuit block and the third use state of the light detection circuit of the present invention, respectively. As shown in FIGS. 1 and 4 , the light-transmitting button 202 b on the casing 201 b is a light-introducing component, which is an implementation of the light-transmitting part 202 . The output signal of the control unit 2 drives the light-emitting chip 11 through the driving component 3, and when the light-emitting chip 11 is turned off, the light detection component 12 reads the external ambient light source introduced by the light-transmitting button 202b, and reads the light-emitting chip 11. The acquired signal is sent to the control unit 2 of the light detection circuit board 10a for processing, and the control unit 2 adjusts the brightness of the backlight module 204, so that the user can clearly see the light source when the brightness of the light source in the external environment is too bright or too dark. The picture displayed on the fluorescent screen 203 of the electronic device 20 can be clearly seen. the

Please refer to Fig. 1 and Fig. 5, which are schematic diagrams of the circuit block and the use state 4 of the photodetection circuit of the present utility model respectively. As shown in FIGS. 1 and 5 : when the light-transmitting portion 202c on the casing 201c is a through hole, the light emitting unit 1 can be installed in the through hole. When the output signal of the control unit 2 drives the light-emitting chip 11 through the driving component 3, so that the light-emitting chip 11 is turned off, the light detection component 12 can directly read the external ambient light source, and transmit the read signal to After being processed by the control unit 2 of the light detection circuit board 10a, the control unit 2 adjusts the brightness of the backlight module 204, so that the user can clearly see the electronic device when the brightness of the light source in the external environment is too bright or too dark. The picture displayed on the fluorescent screen 203 of 20. the

Please refer to FIG. 6 , which is a schematic diagram of another embodiment of the intensity adjustment structure of the backlight light source of the electronic device of the present invention. As shown in FIG. 6 : the difference between this embodiment and the embodiment shown in FIG. 1 is that the light detection component 12 inside the light emitting unit 1 is combined with the drive component 3 to form a single light detection drive component 6 . When the output signal of the control unit 2 drives the light-emitting chip 11 through the driving component 3 to turn off the light-emitting chip 11, the light detection component 12 reads the external ambient light source and transmits the signal to the control unit 2 for processing. Afterwards, compared with the set parameter value stored in the storage unit 4, the brightness of the backlight module 204 can be adjusted by the control unit 2, so that the user can clearly see the electronic device when the external ambient light source is too bright or too dark. The picture displayed on the fluorescent screen 203 of 20. the

The above are only preferred embodiments of the present utility model, and are not intended to limit the implementation scope of the present utility model. That is, all equivalent changes and modifications made according to the claims of the utility model are covered within the patent scope of the utility model. the

Claims (14)

1. A structure for adjusting the intensity of the backlight light source of an electronic device, which is installed inside the housing and is electrically connected to the backlight module. The housing has a light-transmitting portion, and it is characterized in that the adjustment structure has: The light detection circuit board is installed inside the casing, is arranged corresponding to the light-transmitting part, and is electrically connected with the backlight module, and has a light detection circuit on the light detection circuit board; wherein, The light detection circuit, including: a control unit, which is the control core of the light detection circuit; a drive assembly electrically connected to the control unit to receive a drive signal output by the control unit; The light emitting unit has a light emitting chip and a light detection component, and the light emitting chip is electrically connected to the driving component; a storage unit, electrically connected to the control unit, for storing the set parameter value for adjusting the brightness; Wherein, the control unit controls the light-emitting chip to be in a blinking state, and the light detection component reads the external ambient light source entering from the light-transmitting part when the light-emitting chip is in the extinguished state, and transmits the read signal to the control unit for processing, and then Compared with the set parameter value of the storage unit, the control unit adjusts the brightness of the light source of the backlight module according to the set parameter value. 2 . The structure for adjusting the intensity of the backlight light source of an electronic device according to claim 1 , wherein the casing is transparent or opaque. 3 . 3 . The structure for adjusting the intensity of the backlight light source of an electronic device according to claim 2 , wherein the light-transmitting portion on the housing is a light-conducting body or a light-transmitting button. 4 . 4 . The structure for adjusting the intensity of the backlight light source of an electronic device according to claim 1 , wherein the light-emitting chip is a light-emitting diode chip. 5 . The structure for adjusting the intensity of the backlight light source of an electronic device according to claim 4 , wherein the light emitting chip and the light detection component are encapsulated by a package body. 6 . 6 . The structure for adjusting the intensity of the backlight light source of an electronic device according to claim 1 , wherein the control unit is a microprocessor or a CPU. 7 . 7. The structure for adjusting the intensity of a backlight light source of an electronic device according to claim 1, wherein the storage unit is a memory. 8. A structure for adjusting the intensity of the backlight light source of an electronic device, which is installed inside the casing and electrically connected to the backlight module. The casing has a light-transmitting portion, and it is characterized in that the adjustment structure has: The light detection circuit board is installed inside the casing, is arranged corresponding to the light-transmitting part, and is electrically connected with the backlight module, and has a light detection circuit on the light detection circuit board; wherein, The light detection circuit, including: a control unit, which is the control core of the light detection circuit; A light-emitting unit, installed in the light-transmitting part, has a light-emitting chip and a light-detecting driving component, the light-emitting chip is electrically connected to the light-detecting driving component, and the light-detecting driving component is electrically connected to the control unit; a storage unit, electrically connected to the control unit, for storing the set parameter value for adjusting the brightness; Wherein, the control unit controls the light-emitting chip to blink through the light-detection driving component, and the light-detection drive component reads the external ambient light source when the light-emitting chip is in the off state, and transmits the read signal to the control unit for processing, Compared with the set parameter value of the storage unit, the control unit adjusts the brightness of the light source of the backlight module according to the set parameter value. 9 . The structure for adjusting the light intensity of the backlight of an electronic device according to claim 8 , wherein the light-transmitting portion is a perforation. 10 . 10 . The structure for adjusting the intensity of the backlight light source of an electronic device according to claim 8 , wherein the light-emitting chip is a light-emitting diode chip. 11 . 11 . The backlight intensity adjustment structure of an electronic device according to claim 10 , wherein the light emitting chip and the light detection driving component are encapsulated by a package body. 12 . 12. The structure for adjusting the intensity of the backlight light source of an electronic device according to claim 11, wherein the light detection drive assembly is composed of a light detection assembly and a drive assembly, and the light detection assembly is electrically connected to the control unit , the driving component is electrically connected with the light emitting chip and the control unit. 13 . The structure for adjusting the intensity of the backlight light source of an electronic device according to claim 8 , wherein the control unit is a microprocessor or a CPU. 14 . 14. The structure for adjusting the intensity of a backlight light source of an electronic device as claimed in claim 8, wherein the storage unit is a memory.

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