Brightness adjustment circuit

A brightness adjustment and adjustment circuit technology, applied in the direction of digital output to display devices, etc., can solve the problems of poor backlight adjustment sensitivity, increased manufacturing cost of computer motherboards, and increased power consumption of motherboards, so as to overcome the insensitivity of adjustment instructions and improve user Experience the effect of feeling, power consumption and cost savings

Active Publication Date: 2017-11-10
SHENZHEN WEIBU INFORMATION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1) The sensitivity of backlight adjustment is poor
Because the user's operation command to adjust the backlight needs to pass through the EC or other conversion chips first, and then send it to the LVDS controller of the X86 motherboard. When several modules are jointly debugged, sometimes there will be hysteresis. The intuitive experience of the user is that the sensitivity is poor.
[0005] 2) The power consumption of the motherboard is high
The EC chip or LVDS conversion chip ad

Method used

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  • Brightness adjustment circuit

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Example Embodiment

[0017] Please refer to the attached figure 1 , Which shows the circuit diagram of the brightness adjustment circuit, in view of the current need to achieve the brightness adjustment of the computer through an EC chip or an independent LVDS conversion chip, which causes the problem of poor adjustment sensitivity. A brightness adjustment circuit that improves the sensitivity of LVDS backlight adjustment and reduces the manufacturing cost and power consumption of the motherboard is proposed. In this circuit, the method of using EC or LVDS conversion IC is abandoned, and the backlight brightness adjustment is realized by directly using the platform control chip of the X86 computer motherboard.

[0018] The adjusting circuit directly controls the platform processor U1 through the brightening circuit and the dimming circuit connected to the X86 computer platform processor U1; the brightening circuit includes the brightening button Key1 and the first filter circuit, wherein the brighten...

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Abstract

A brightness adjustment circuit directly controls the platform processor U1 through a brightening circuit and a dimming circuit connected to the X86 computer platform processor U1; wherein the brightening button Key1 in the brightening circuit is connected with an electrostatic protection diode D1, Through the first filter circuit, it is connected to the pin GPIOx of the X86 platform processor U1 to form an external backlight dimming command adjustment circuit as a whole; wherein the dimming key Key2 in the dimming circuit is connected to the electrostatic protection diode D2, through the The second filter circuit composed of the resistor R3 and the capacitor C2 is connected to the pin GPIOy of the processor U1 of the X86 platform, and constitutes an external backlight dimming instruction regulating circuit as a whole. The adjustment circuit achieves the function of receiving user brightness adjustment instructions and outputting pulse width adjustment signals through a relatively simple external circuit combined with the X86 platform controller, avoiding communication delays in communication with third-party ICs, and overcoming the need for adjustment instructions. unresponsive issues, and saves power and cost.

Description

【Technical field】 [0001] The invention relates to an electronic computer mainboard, in particular to an all-in-one computer mainboard without an EC chip (Embedded Controller, which is an embedded controller chip). The brightness adjustment method of the built-in LVDS interface (LowVoltage Differential Signaling, which is a low-voltage differential signal technology interface) is carried out through the X86 computer motherboard PCH itself (PlatformControlling Hub, which is the platform control chip adopted by the X86 computer motherboard). 【Background technique】 [0002] All-in-one products are becoming more and more popular, not only used in homes, but also in advertising, medical and other industry applications, and these products mostly use LVDS display screens, generally ranging in size from 24 inches to 60 This requires that the computer motherboard assembled in the all-in-one product must have the function of LVDS backlight adjustment. [0003] Nowadays, the LVDS backl...

Claims

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Application Information

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IPC IPC(8): G06F3/14
Inventor 黄建新陈忠华
Owner SHENZHEN WEIBU INFORMATION
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