Hand-held instrument capable of automatically adjusting display brightness

Abstract

The utility model provides a handheld instrument capable of automatically adjusting display brightness, and relates to the technical field of instruments. The handheld instrument comprises a display part, a brightness control part, a signal processing part, an MCU unit and an input and output module, the brightness control part comprises a first processing circuit, a second processing circuit and a resistor which are electrically connected with the MCU unit, and the display part is used for setting the working mode of a display screen; the MCU unit is used for inputting an instruction to the first processing circuit, the first processing circuit responds to the instruction and outputs a display screen working voltage signal, the second processing circuit samples a voltage signal on a resistor and transmits the voltage signal to the signal processing part, and the signal processing part processes the received voltage signal and transmits the voltage signal to the display screen. And the working current of the display screen reaches the preset current, so that the set display brightness is achieved. By adopting the resistor and the circuit module, automatic adjustment of the display brightness of the handheld instrument is realized, and convenience is brought to the use of the handheld instrument.

Description

Technical Field

[0001] The utility model relates to the technical field of instruments, in particular to a handheld instrument with automatically adjustable display brightness. Background Art

[0002] As handheld meters are easy to carry and use, they are used more and more frequently in water quality testing. With different places of use, the requirements for the display brightness of handheld meters are also different. At present, the common practice is that either the brightness cannot be adjusted or the brightness is adjusted manually little by little through buttons, which makes it inconvenient to use.

[0003] Therefore, it is necessary to provide a handheld instrument that can automatically adjust the display brightness. Utility Model Content

[0004] The purpose of the utility model is to provide a handheld instrument with automatically adjustable display brightness to solve the problem of automatic brightness adjustment of the handheld instrument in view of the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] The utility model provides a handheld instrument with automatically adjustable display brightness, the instrument comprises: a display part, a brightness control part, a signal processing part, an MCU unit and an input and output module, the brightness control part comprises a first processing circuit electrically connected to the MCU unit, a second processing circuit electrically connected to the output end of the first processing circuit, and a resistor R6,

[0007] The display part is used for the user to set the working mode of the display screen of the handheld instrument according to the usage scenario; the MCU unit is used to input a command signal to the first processing circuit according to the selected working mode, and the first processing circuit outputs a corresponding display screen working voltage signal in response to the received command signal. The second processing circuit samples the voltage signal on the resistor R6 and transmits it to the signal processing part, and the signal processing part processes the received voltage signal and transmits it to the display screen, so that the working current of the display screen reaches the preset working current, thereby achieving the set display brightness.

[0008] Optionally, the first processing circuit is an AD5165 circuit module.

[0009] Optionally, the second processing circuit includes a first operational amplifier and a second operational amplifier connected via a resistor R3, and both the first operational amplifier and the second operational amplifier are LM358 circuit modules.

[0010] The beneficial effects of the utility model include:

[0011] The handheld instrument with automatically adjustable display brightness provided by the utility model comprises: a display part, a brightness control part, a signal processing part, an MCU unit and an input-output module, wherein the brightness control part comprises a first processing circuit electrically connected to the MCU unit, a second processing circuit electrically connected to the output end of the first processing circuit, and a resistor R6, and the display part is used for the user to set the working mode of the display screen of the handheld instrument according to the use scenario; the MCU unit is used to input a command signal to the first processing circuit according to the selected working mode, the first processing circuit outputs a corresponding display screen working voltage signal in response to the received command signal, the second processing circuit samples the voltage signal on the resistor R6 and transmits it to the signal processing part, the signal processing part processes the received voltage signal and transmits it to the display screen, so that the working current of the display screen reaches the preset working current, thereby achieving the set display brightness. The present application adopts resistors and circuit modules to realize the automatic adjustment of the display brightness of the handheld instrument, which brings convenience to the on-site use of the handheld instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 The structure block diagram of the handheld instrument with automatically adjustable display brightness provided by the embodiment of the utility model is shown;

[0014] Figure 2 The circuit schematic diagram of a handheld instrument with automatically adjustable display brightness provided by an embodiment of the utility model is shown. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0018] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0019] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] Since handheld meters are easy to carry and use, they will be used more and more frequently in water quality testing. With different places of use, the requirements for the display brightness of handheld meters are also different. At present, the common practice is that either the brightness cannot be adjusted or the brightness is adjusted manually little by little through buttons, which makes it inconvenient to use. Therefore, it is necessary to provide a handheld meter that can automatically adjust the display brightness.

[0021] Figure 1 The structure block diagram of the handheld instrument with automatically adjustable display brightness provided by the embodiment of the utility model is shown; Figure 2 The circuit schematic diagram of a handheld instrument with automatically adjustable display brightness provided by an embodiment of the utility model is shown.

[0022] like Figure 1 As shown, the utility model provides a handheld instrument with automatically adjustable display brightness, the instrument includes: a display part, a brightness control part, a signal processing part, an MCU unit and an input-output module, the brightness control part includes a first processing circuit electrically connected to the MCU unit, a second processing circuit electrically connected to the output end of the first processing circuit, and a resistor R6. The display part is used for the user to set the working mode of the display screen of the handheld instrument according to the use scenario; the MCU unit is used to input a command signal to the first processing circuit according to the selected working mode, the first processing circuit outputs the corresponding display screen working voltage signal in response to the received command signal, the second processing circuit samples the voltage signal on the resistor R6 and transmits it to the signal processing part, the signal processing part processes the received voltage signal and transmits it to the display screen, so that the working current of the display screen reaches the preset working current, thereby achieving the set display brightness. Optionally, the first processing circuit is an AD5165 circuit module. Optionally, the second processing circuit includes a first operational amplifier and a second operational amplifier connected via a resistor R3, and the first operational amplifier and the second operational amplifier are both LM358 circuit modules.

[0023] In summary, the present application uses resistors and circuit modules to achieve automatic adjustment of the display brightness of a handheld instrument, which brings convenience to the on-site use of the handheld instrument.

[0024] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A handheld instrument with automatically adjustable display brightness, characterized in that: The handheld instrument comprises: a display part, a brightness control part, a signal processing part, an MCU unit and an input-output module, wherein the brightness control part comprises a first processing circuit electrically connected to the MCU unit, a second processing circuit electrically connected to an output end of the first processing circuit, and a resistor R6. The display part is used for the user to set the working mode of the display screen of the handheld instrument according to the usage scenario; the MCU unit is used to input a command signal to the first processing circuit according to the selected working mode, and the first processing circuit outputs a corresponding display screen working voltage signal in response to the received command signal. The second processing circuit samples the voltage signal on the resistor R6 and transmits it to the signal processing part. The signal processing part processes the received voltage signal and transmits it to the display screen, so that the working current of the display screen reaches the preset working current, thereby achieving the set display brightness.

2. The handheld instrument with automatically adjustable display brightness according to claim 1, characterized in that: The first processing circuit is an AD5165 circuit module.

3. The handheld instrument with automatically adjustable display brightness according to claim 1, characterized in that: The second processing circuit includes a first operational amplifier and a second operational amplifier connected via a resistor R3, and both the first operational amplifier and the second operational amplifier are LM358 circuit modules.

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