Backlight and Smart Lighting Control by Ambient Light and Proximity Sensor Reference Design


Design files


This system conserves power and extends backlight life by dynamically adjusting the backlight brightness relative to the environment's ambient light.  A capacitive proximity sensor wakes up the system when a user is close to save even more power.


Watch related videos about Sensing NOW.

  • Detects Human Proximity Using Copper PCB Material or Other Conductive Materials
  • Good Human Eye Spectral Matching
  • Dynamically Adjust Backlight Brightness
  • UV Filter for Outdoor Use
  • Humidity and Temperature Sensor
  • This subsystem is tested and includes hardware files, firmware, demo, and Getting Started Guide
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDU781.PDF (10898 K)

Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRDM2.PDF (1082 K)

Detailed overview of design layout for component placement

TIDRDM4.ZIP (1049 K)

Files used for 3D models or 2D drawings of IC components

TIDC992.ZIP (2101 K)

Design file that contains information on physical board layer of design PCB

TIDRDM3.PDF (1811 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Ambient light sensors

OPT3001Digital ambient light sensor (ALS) with high-precision human-eye response

Data sheet: PDF | HTML
Backlight LED drivers

LM3630ALM3630A high-efficiency dual-String white LED driver

Data sheet: PDF | HTML
ESD protection diodes

TPD2E2U06Dual 1.5-pF, 5.5-V, ±25-kV ESD protection diode with 5.5-A 8/20-uS surge rating for USB 2.0

Data sheet: PDF | HTML
Humidity sensors

HDC1000Low Power, 3% Accuracy Digital Humidity Sensor with Integrated Temperature Sensor

Data sheet: PDF | HTML
Humidity sensors

HDC1008Low Power, 4% Accuracy Digital Humidity Sensor with Integrated Temperature Sensor

Data sheet: PDF | HTML
Humidity sensors

HDC1010±2% low-power digital humidity and temperature sensor in WCSP

Data sheet: PDF | HTML
Humidity sensors

HDC1050±3% low-power, digital humidity sensor with temperature sensor

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

TLV713P150-mA, capacitor-free low-dropout voltage regulator with active output discharge & enable

Data sheet: PDF | HTML
MSP430 microcontrollers

MSP430FR596916 MHz MCU with 64KB FRAM, 2KB SRAM, AES, 12-bit ADC, comparator, DMA, UART/SPI/I2C, timer

Data sheet: PDF | HTML
Signal conditioners

FDC10044-Ch, 16-bit, capacitance to digital converter with active shield driver

Data sheet: PDF | HTML

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Technical documentation

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Type Title Date
* Design guide Backlight and Smart Lighting Control by Ambient Light and Proximity Sensor Mar. 12, 2015
Technical article How to bring the IoT to older buildings with automation technology Aug. 13, 2015

Related design resources

Reference designs

TIDA-00220 Capacitive-Based Human Proximity Detection for System Wake-Up & Interrupt Reference Design TIDA-00754 Smart lighting & backlight control by ambient light & noise-immune proximity sensor reference design TIDA-01364 Smart Backlight Control by White LED Driver, Ambient Light, and Proximity Sensor Reference Design

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